Skip to main content

Home/ UWC Grade 5 (2009-2010)/ Group items tagged addition

Rss Feed Group items tagged

Shaian R

Deforestation - 0 views

  • What is Deforestation Deforestation is defined as the destruction of forested land. It has proved to be a major problem all over world. However, the rates of destruction of forests are particularly high in the tropics. Causes of Deforestation The causes of deforestation vary form place to place. The most common causes, however, are logging, agricultural expansion, wars, and mining, Effects of Deforestation Deforestation has been the cause of many problems facing the world today such as erosions, loss of biodiversity through extinction of plant and animal species, and increased atmospheric carbon dioxide. Importnace of Vegetation Deforestation consequently decrease the supply of oxygen found on earth. Oxygen is essential to the existence of all living things and without it every living creature (including humans) will not be able to sustain life. In addition, forests provide homes for many important species such as the Northern Spotted Owl which can only survive in the northwestern United States . Furthermore, forests prevent desertification by replenishing nutrients in the land. These are just a few reasons why forests are soon important.  
  • What is Deforestation Deforestation is defined as the destruction of forested land. It has proved to be a major problem all over world. However, the rates of destruction of forests are particularly high in the tropics. Causes of Deforestation The causes of deforestation vary form place to place. The most common causes, however, are logging, agricultural expansion, wars, and mining, Effects of Deforestation Deforestation has been the cause of many problems facing the world today such as erosions, loss of biodiversity through extinction of plant and animal species, and increased atmospheric carbon dioxide. Importnace of Vegetation Deforestation consequently decrease the supply of oxygen found on earth. Oxygen is essential to the existence of all living things and without it every living creature (including humans) will not be able to sustain life. In addition, forests provide homes for many important species such as the Northern Spotted Owl which can only survive in the northwestern United States . Furthermore, forests prevent desertification by replenishing nutrients in the land. These are just a few reasons why forests are soon important.   CLICK ON A REGION BELOW Africa South America North and Central America Europe Asia Oceania     Back to top | Home | Deforestation | Prevent | Interact | Bibliography | Contact ©2005 Copyright© Think Quest Team All Rights Reserved  
  •     Deforestation What is Deforestation Deforestation is defined as the destruction of forested land. It has proved to be a major problem all over world. However, the rates of destruction of forests are particularly high in the tropics. Causes of Deforestation The causes of deforestation vary form place to place. The most common causes, however, are logging, agricultural expansion, wars, and mining, Effects of Deforestation Deforestation has been the cause of many problems facing the world today such as erosions, loss of biodiversity through extinction of plant and animal species, and increased atmospheric carbon dioxide. Importnace of Vegetation Deforestation consequently decrease the supply of oxygen found on earth. Oxygen is essential to the existence of all living things and without it every living creature (including humans) will not be able to sustain life. In addition, forests provide homes for many important species such as the Northern Spotted Owl which can only survive in the northwestern United States . Furthermore, forests prevent desertification by replenishing nutrients in the land. These are just a few reasons why forests are soon important.
  • ...1 more annotation...
  •     Deforestation What is Deforestation Deforestation is defined as the destruction of forested land. It has proved to be a major problem all over world. However, the rates of destruction of forests are particularly high in the tropics. Causes of Deforestation The causes of deforestation vary form place to place. The most common causes, however, are logging, agricultural expansion, wars, and mining, Effects of Deforestation Deforestation has been the cause of many problems facing the world today such as erosions, loss of biodiversity through extinction of plant and animal species, and increased atmospheric carbon dioxide. Importnace of Vegetation Deforestation consequently decrease the supply of oxygen found on earth. Oxygen is essential to the existence of all living things and without it every living creature (including humans) will not be able to sustain life. In addition, forests provide homes for many important species such as the Northern Spotted Owl which can only survive in the northwestern United States . Furthermore, forests prevent desertification by replenishing nutrients in the land. These are just a few reasons why forests are soon important.
Ajay V

Deforestation in the Amazon - 0 views

shared by Ajay V on 11 Sep 09 - Cached
  •  
    Home What's New About Contribute Submissions Rainforests Mission Introduction Characteristics Biodiversity The Canopy Forest Floor Forest Waters Indigenous People Deforestation Consequences Saving Rainforests Amazon rainforest Borneo rainforest Congo rainforest Country Profiles Statistics Works Cited For Kids For Teachers Photos/Images Expert Interviews Rainforest News XML Feeds Chinese French Japanese Spanish Other Languages Pictures Books Links Newsletter Education Mongabay Sites Kids' site Travel Tips Tropical Fish Madagascar Contact About this site Providing tropical forest news, statistics, photos, and information, rainforests.mongabay.com is the world's most popular rainforest site. [more] Deforestation in the Amazon DEFORESTATION IN BRAZIL: 60-70 percent of deforestation in the Amazon results from cattle ranches while the rest mostly results from small-scale subsistence agriculture. Despite the widespread press attention, large-scale farming (i.e. soybeans) currently contributes relatively little to total deforestation in the Amazon. Most soybean cultivation takes place outside the rainforest in the neighboring cerrado grassland ecosystem and in areas that have already been cleared. Logging results in forest degradation but rarely direct deforestation. However, studies have showed a close correlation between logging and future clearing for settlement and farming. [Português | Español | Français] Deforestation by state Deforestation Figures for Brazil Year Deforestation [sq mi] Deforestation [sq km] Change [%] 1988 8,127 21,050 1989 6,861 17,770 -16% 1990 5,301 13,730 -23% 1991 4,259 11,030 -20% 1992 5,323 13,786 25% 1993 5,751 14,896 8% 1994 5,751 14,896 0% 1995 11,220 29,059 95% 1996 7,012 18,161 -38% 1997 5,107 13,227 -27% 1998 6,712 17,383 31% 1999 6,664 17,259 -1% 2000 7,037 18,226 6% 2001 7,014 18,165 0% 2002 8,260 2
  •  
    TROPICAL RAINFORESTS: Deforestation in Brazil Click Here Home What's New About Contribute Submissions Rainforests Mission Introduction Characteristics Biodiversity The Canopy Forest Floor Forest Waters Indigenous People Deforestation Consequences Saving Rainforests Amazon rainforest Borneo rainforest Congo rainforest Country Profiles Statistics Works Cited For Kids For Teachers Photos/Images Expert Interviews Rainforest News XML Feeds Chinese French Japanese Spanish Other Languages Pictures Books Links Newsletter Education Mongabay Sites Kids' site Travel Tips Tropical Fish Madagascar Contact About this site Providing tropical forest news, statistics, photos, and information, rainforests.mongabay.com is the world's most popular rainforest site. [more] Deforestation in the Amazon DEFORESTATION IN BRAZIL: 60-70 percent of deforestation in the Amazon results from cattle ranches while the rest mostly results from small-scale subsistence agriculture. Despite the widespread press attention, large-scale farming (i.e. soybeans) currently contributes relatively little to total deforestation in the Amazon. Most soybean cultivation takes place outside the rainforest in the neighboring cerrado grassland ecosystem and in areas that have already been cleared. Logging results in forest degradation but rarely direct deforestation. However, studies have showed a close correlation between logging and future clearing for settlement and farming. [Português | Español | Français] Deforestation by state Deforestation Figures for Brazil Year Deforestation [sq mi] Deforestation [sq km] Change [%] 1988 8,127 21,050 1989 6,861 17,770 -16% 1990 5,301 13,730 -23% 1991 4,259 11,030 -20% 1992 5,323 13,786 25% 1993 5,751 14,896 8% 1994 5,751 14,896 0% 1995 11,220 29,059 95% 1996 7,012 18,161 -38% 1997 5,107 13,227 -27% 1998 6,712 17,383 31% 1999 6,664
Yen Yu C

Benefits of Deforestation - 0 views

  • One of the easiest benefits of deforestation to spot are the economic ones. Lumber products are one of the most staple constructive materials in human society. Whether it's raw lumber used for making tables and houses, or paper and other wood by-products, we simply cannot live without the use of lumber. Like steel and stone, wood is one of the most basic natural resources, and unlike steel and stone, it is renewable simply by growing more trees. The only real trick to balancing it's consumption is to grow more trees to replace the ones taken.
    • Yen Yu C
       
      that's why it's soo hard to be balanced. Good for my question Q$
  • his benefit of deforestation not only covers the people who cut down trees and process them, but also extends to the people who "clean up" after them. For every patch of forest cut down, arable land becomes available for farmers, or can be used as an area to place urban living sites like apartments, houses, and buildings. The number of people employed by such a construction project are many and varied. Or, if the city/government mandates replanting trees to replace the lost ones, then jobs are also provided for those people who do the seeding after a patch of forest is stripped.
    • Yen Yu C
       
      Key Words "Clean Up"
  •  
    One of the easiest benefits of deforestation to spot are the economic ones. Lumber products are one of the most staple constructive materials in human society. Whether it's raw lumber used for making tables and houses, or paper and other wood by-products, we simply cannot live without the use of lumber. Like steel and stone, wood is one of the most basic natural resources, and unlike steel and stone, it is renewable simply by growing more trees. The only real trick to balancing it's consumption is to grow more trees to replace the ones taken. On a similarly related note, keep in mind that a lot of jobs revolve around the use of lumber. Wood cutters aside, there are those who work in processing plants to make glue from wood sap, process pulp into paper, and others. This is another benefit of deforestation; it opens more job opportunities for people who would otherwise be unemployed. These job opportunities are more than simply a humanitarian concept; society at large would suffer if all of the people working in the wood industry were to suddenly find themselves jobless. This benefit of deforestation not only covers the people who cut down trees and process them, but also extends to the people who "clean up" after them. For every patch of forest cut down, arable land becomes available for farmers, or can be used as an area to place urban living sites like apartments, houses, and buildings. The number of people employed by such a construction project are many and varied. Or, if the city/government mandates replanting trees to replace the lost ones, then jobs are also provided for those people who do the seeding after a patch of forest is stripped. Thinking about it, the cleared areas are places which provide a lot of potential for growth, and this is yet another benefit of deforestation. As stated above, arable land is valuable, and the act of deforestation to clear a place for farm land provides a much needed additional food source for man. More often than not, the
Kengo M

From Wood to Paper - 0 views

  • From Wood to Paper:A Diagram of the Process & Chemistry Chemical Additives and Reactions A White Liquor added to wood chips.(Na2S + Na OH + Na2CO3) B Black Liquor washed out. C Pulp treated with Chlorine to oxidize Lignin. D Pulp extracted with Caustic Sods to remove Lignin. E Pulp treated with Sodium Hypochiorite(Na OCI) F Pulp treated with Chlorine Dioxide(CI O2) to increase whiteness. G Bleached pulp slurry. Rosin, Alum, Dyes, Clay, Titanium Dioxide (TI O2), added. H Paper sheet formed here through dewatering. Rosin and Alum react to size the paper (make it more waterproof). I Black Liquor (Spent White Liquor + Lignins from Wood). J Converts Black Liquor + added saltcake to Green Liquor thru combustion1. Na2SO4 ---> Na2S2. Na Lignin ---> Na2CO3 K Contains Green Liquor(Na2CO3 + Na2S) L Converts Green Liquor to White Liquor(Na2S + NaCO3 + Ca (OH)2 ---> Na OH + Na2S + Ca CO3) M Calcium Carbonate (Ca CO3) is settled out and sent to Lime Kiln. Clarified White Liquor goes back into new cooking cycle at Piont A. Chemical Additives and Reactions A White Liquor added to wood chips.(Na2S + Na OH + Na2CO3) B Black Liquor washed out. C Pulp treated with Chlorine to oxidize Lignin.
    • Kengo M
       
      For Q1
  •  
    diagram of the trees to paper
Victoria B

Tropical rainforest - Wikipedia, the free encyclopedia - 1 views

  • tropical rainforests are considered a type of tropical wet forest (or tropical moist broadleaf forest) and may also be referred to as lowland equatorial evergreen rainforest
    • Gurupranav G
       
      Intro for report.
  • and may also be referred to as lowland equatorial evergreen rainforest
  • Rainforests are home to half of all the living animal and plant species on the planet.[2] Tropical rain forests are called the "world's largest pharmacy" because over one-quarter of modern medicines originate from its plants.
    • Gurupranav G
       
      Intro for report.
  • ...18 more annotations...
  • The rainforest is divided into five different layers, each with different plants and animals, adapted for life in the particular area. These are: the floor layer, the shrub layer, the undercanopy layer, the canopy layer and the emergent layer. Only the emergent layer is unique to tropical rainforests, while the others are also found in temperate rainforests.
    • Gurupranav G
       
      Useful for my Q2.
  • The emergent layer contains a small number of very large trees which grow above the general canopy, reaching heights of 45-55 m, although on occasion a few species will grow to 70 m or 80 m tall.
    • Gurupranav G
       
      Useful for my Q2.
  • Eagles, butterflies, bats and certain monkeys inhabit this layer
    • Gurupranav G
       
      Useful for my Q2.
  • Those animals include: snakes, toucans and tree frogs.
    • Gurupranav G
       
      Useful for my Q2.
  • Many animals live here including jaguars, red-eyed tree frogs and leopards. There is a large concentration of insects here.
    • Gurupranav G
       
      Useful for my Q2.
  • Giant anteaters live in this layer
    • Gurupranav G
       
      Useful for my Q2.
  • A tropical rainforest is an ecosystem usually found around the equator. They are common in Asia, Australia, Africa, South America, Central America, Mexico and on many of the Pacific Islands. Within the World Wildlife Fund's biome classification,
    • Gurupranav G
       
      Intro for report.
  • Minimum normal annual rainfall between 1,750 millimetres (69 in) and 2,000 millimetres (79 in) occurs in this climate region. Mean monthly temperatures exceed 18 °C (64 °F) during all months of the year.[1]
    • Gurupranav G
       
      Intro for report
    • Gurupranav G
       
      Intro for report.
  • The undergrowth in a rainforest is restricted in many areas by the lack of sunlight at ground level.[4] This makes it possible for people and other animals to walk through the forest. If the leaf canopy is destroyed or thinned for any reason, the ground beneath is soon colonized by a dense tangled growth of vines, shrubs and small trees called a jungle.[5]
    • Gurupranav G
       
      Intro for report.
  • able to withstand the hot temperatures and strong winds.
    • Gurupranav G
       
      Useful for my Q2.
  • Canopy - This is the primary layer of the forest and forms a roof over the two remaining layers. Most canopy trees have smooth, oval leaves that come to a point. It's a maze of leaves and branches. Many animals live in this area since food is abundant.
    • Gurupranav G
       
      Useful for my Q2.
  • Under canopy - Little sunshine reaches this area so the plants have to grow larger leaves to reach the sunlight. The plants in this area seldom grow to 12 feet
    • Gurupranav G
       
      Useful for my Q2.
  • Shrub layer/forest floor - This layer is very dark. Almost no plants grow in this area, as a result. Since hardly any sun reaches the forest floor things begin to decay quickly. A leaf that might take one year to decompose in a regular climate will disappear in 6 weeks
    • Gurupranav G
       
      Useful for my Q2.
  • An increase in tourism has increased economic support, allowing more revenue to go into the protection of the habitat. Tourism can contribute directly to the conservation of sensitive areas and habitat. Revenue from park-entrance fees and similar sources can be utilised specifically to pay for the protection and management of environmentally sensitive areas. Revenue from taxation and tourism provides an additional incentive for governments to contribute revenue to the protection of the forest. Tourism also has the potential to increase public appreciation of the environment and to spread awareness of environmental problems when it brings people into closer contact with the environment. Such increased awareness can induce more environmentally conscious behavior. Tourism has had a positive effect on wildlife preservation and protection efforts, notably in Africa but also in South America, Asia, Australia, and the South Pacific.[14]
    • Gurupranav G
       
      Useful for my Q4.
    • Victoria B
       
      HAve to use for project
  • Tall, broad-leaved evergreen trees are the dominant plants, forming a leafy canopy over the forest floor. Taller trees,
    • Victoria B
       
      Must use for project
Kengo M

Desert - Wikipedia, the free encyclopedia - 0 views

shared by Kengo M on 08 Sep 09 - Cached
  • Deserts take up about one third (33 percent) of the Earth's land surface.
    • Marius S
       
      Look more on it.
  • Deserts are often composed of sand and rocky surfaces.
  • In hot deserts the temperature in the daytime can reach 45 °C/113 °F or higher in the summer, and dip to 0 °C/32°F or lower in the winter.
    • Marius S
       
      Intresting information!
  • ...3 more annotations...
  • The 10 largest deserts Rank   Desert   Area (km²)   Area (mi²)   1 Antarctic Desert (Antarctica) 13,829,430 5,339,573 2 Arctic 13,700,000+ 5,300,000+ 3 Sahara (Africa) 9,100,000+ 3,320,000+ 4 Arabian Desert (Middle East) 2,330,000 900,000 5 Gobi Desert (Asia) 1,300,000 500,000 6 Kalahari Desert (Africa) 900,000 360,000 7 Patagonian Desert (South America) 670,000 260,000 8 Great Victoria Desert (Australia) 647,000 250,000 9 Syrian Desert (Middle East) 520,000 200,000 10 Great Basin Desert (North America) 492,000 190,000
    • Kengo M
       
      So THE IS THE COLD DESERTS. i THOUGHT THEY WERE SMALLER. i SHOULD LEARN MORE ABOUT THE COLD DESERTS
  • A desert is a hostile, potentially deadly environment for unprepared humans. In hot deserts, high temperatures cause rapid loss of water due to sweating, and the absence of water sources with which to replenish it can result in dehydration and death within a few days. In addition, unprotected humans are also at risk from heatstroke.
  • Humans may also have to adapt to sandstorms in some deserts
  •  
    Wow that is big. What kind of animals live there?
Gurupranav G

Rainforest Biomes - 0 views

  • Many species of animal life can be found in the rain forest. Common characteristics found among mammals and birds (and reptiles and amphibians, too) include adaptations to a life in the trees, such as the prehensile tails of New World monkeys. Other characteristics are bright colors and sharp patterns, loud vocalizations, and diets heavy on fruits. Insects make up the largest single group of animals that live in tropical forests. They include brightly colored butterflies, mosquitoes, camouflaged stick insects, and huge colonies of ants. The Amazon river basin rainforest contains a wider variety of plant and animal life than any other biome in the world. The second largest population of plant and animal life can be found in scattered locations and islands of Southeast Asia. The lowest variety can be found in Africa. There may be 40 to 100 different species in 2.5 acres ( 1 hectare) of a tropical rain forest.   When early explorers first discovered the rainforests of Africa, Southeast Asia and South America, they They were amazed by the dense growth, trees with giant buttresses, vines and epiphytes . The tropical vegetation grew so dense that it was difficult to cut one's way through it. It was thought at the time that the soil of a rainforest must be very fertile, filled with nutrients, enabling it to support the immense trees and other vegetation they found. Today we know that the soil of the tropical rainforests is shallow, very poor in nutrients and almost without soluble minerals. Thousands of years of heavy rains have washed away the nutrients in the soil obtained from weathered rocks. The rainforest has a very short nutrient cycle. Nutrients generally stay in an ecosystem by being recycled and in a rainforest are mainly found in the living plants and the layers of decomposing leaf litter. Various species of decomposers like insects, bacteria, and fungi make quick work of turning dead plant and animal matter into nutrients. Plants take up these nutrients the moment they are released. A study in the Amazon rainforest found that 99% of nutrients are held in root mats. When a rainforest is burned or cut down the nutrients are removed from the ecosystem. The soil can only be used for a very short time before it becomes completely depleted of all nutrients.
    • Gurupranav G
       
      A great peice of info if you want to look at the biodiversity of animals in a rainforest
  • Besides these four layers, a shrub/sapling layer receives about 3 % of the light that filters in through the canopies. These stunted trees are capable of a sudden growth surge when a gap in the canopy opens above them. The air beneath the lower canopy is almost always humid. The trees themselves give off water through the pores (stomata) of their leaves. This process, called transpiration, can account for as much as half of the precipitation in the rain forest. Rainforest plants have made many adaptations to their environment. With over 80 inches of rain per year, plants have made adaptations that helps them shed water off their leaves quickly so the branches don't get weighed down and break. Many plants have drip tips and grooved leaves, and some leaves have oily coatings to shed water. To absorb as much sunlight as possible on the dark understory, leaves are very large. Some trees have leaf stalks that turn with the movement of the sun so they always absorb the maximum amount of light. Leaves in the upper canopy are dark green, small and leathery to reduce water loss in the strong sunlight. Some trees will grow large leaves at the lower canopy level and small leaves in the upper canopy. Other plants grow in the upper canopy on larger trees to get sunlight. These are the epiphytes such as orchids and bromeliads. Many trees have buttress and stilt roots for extra support in the shallow, wet soil of the rainforests. Over 2,500 species of vines grow in the rainforest. Lianas start off as small shrubs that grow on the forest floor. To reach the sunlight in the upper canopy it sends out tendrils to grab sapling trees. The liana and the tree grow towards the canopy together. The vines grow from one tree to another and make up 40% of the canopy leaves. The rattan vine has spikes on the underside of its leaves that point backwards to grab onto sapling trees. Other "strangler" vines will use trees as support and grow thicker and thicker as they reach the canopy, strangling its host tree. They look like trees whose centers have been hollowed out. Dominant species do not exist in tropical rainforests. Lowland dipterocarp forest can consist of many different species of Dipterocarpaceae, but not all of the same species. Trees of the same species are very seldom found growing close together. This bio diversity and separation of the species prevents mass contamination and die-off from disease or insect infestation. Bio diversity also insures that there will be enough pollinators to take care of each species' needs. Animals depend on the staggered blooming and fruiting of rainforest plants to supply them with a year-round source of food.
    • Gurupranav G
       
      Again, another useful peice of info if you are looking at the diversity of plants in the rainforest.
  • There are four very distinct layers of trees in a tropical rain forest. These layers have been identified as the emergent, upper canopy, understory, and forest floor. Emergent trees are spaced wide apart, and are 100 to 240 feet tall with umbrella-shaped canopies that grow above the forest. Because emergent trees are exposed to drying winds, they tend to have small, pointed leaves. Some species lose their leaves during the brief dry season in monsoon rainforests. These giant trees have straight, smooth trunks with few branches. Their root system is very shallow, and to support their size they grow buttresses that can spread out to a distance of 30 feet. The upper canopy of 60 to 130 foot trees allows light to be easily available at the top of this layer, but greatly reduced any light below it. Most of the rainforest's animals live in the upper canopy. There is so much food available at this level that some animals never go down to the forest floor. The leaves have "drip spouts" that allows rain to run off. This keeps them dry and prevents mold and mildew from forming in the humid environment. The understory, or lower canopy, consists of 60 foot trees. This layer is made up of the trunks of canopy trees, shrubs, plants and small trees. There is little air movement. As a result the humidity is constantly high. This level is in constant shade. The forest floor is usually completely shaded, except where a canopy tree has fallen and created an opening. Most areas of the forest floor receive so little light that few bushes or herbs can grow there. As a result, a person can easily walk through most parts of a tropical rain forest. Less than 1 % of the light that strikes the top of the forest penetrates to the forest floor. The top soil is very thin and of poor quality. A lot of litter falls to the ground where it is quickly broken down by decomposers like termites, earthworms and fungi. The heat and humidity further help to break down the litter. This organic matter is then just as quickly absorbed by the trees' shallow roots
    • Gurupranav G
       
      This peice of info tells you about the plants that live in each of the layers of the rainforest and some of their qualities. Very useful indeed.
  • ...1 more annotation...
  • The tropical rain forest is a forest of tall trees in a region of year-round warmth. An average of 50 to 260 inches (125 to 660 cm.) of rain falls yearly. Rain forests belong to the tropical wet climate group. The temperature in a rain forest rarely gets higher than 93 °F (34 °C) or drops below 68 °F (20 °C); average humidity is between 77 and 88%; rainfall is often more than 100 inches a year. There is usually a brief season of less rain. In monsoonal areas, there is a real dry season. Almost all rain forests lie near the equator. Rainforests now cover less than 6% of Earth's land surface. Scientists estimate that more than half of all the world's plant and animal species live in tropical rain forests. Tropical rainforests produce 40% of Earth's oxygen. A tropical rain forest has more kinds of trees than any other area in the world. Scientists have counted about 100 to 300 species in one 2 1/2-acre (1-hectare) area in South America. Seventy percent of the plants in the rainforest are trees. About 1/4 of all the medicines we use come from rainforest plants. Curare comes from a tropical vine, and is used as an anesthetic and to relax muscles during surgery. Quinine, from the cinchona tree, is used to treat malaria. A person with lymphocytic leukemia has a 99% chance that the disease will go into remission because of the rosy periwinkle. More than 1,400 varieties of tropical plants are thought to be potential cures for cancer. All tropical rain forests resemble one another in some ways. Many of the trees have straight trunks that don't branch out for 100 feet or more. There is no sense in growing branches below the canopy where there is little light. The majority of the trees have smooth, thin bark because there is no need to protect the them from water loss and freezing temperatures. It also makes it difficult for epiphytes and plant parasites to get a hold on the trunks. The bark of different species is so similar that it is difficult to identify a tree by its bark. Many trees can only be identified by their flowers. Despite these differences, each of the three largest rainforests--the American, the African, and the Asian--has a different group of animal and plant species. Each rain forest has many species of monkeys, all of which differ from the species of the other two rain forests. In addition, different areas of the same rain forest may have different species. Many kinds of trees that grow in the mountains of the Amazon rain forest do not grow in the lowlands of that same forest.
    • Gurupranav G
       
      This tells you about what a tropical rainforest basically is, some of it's qualities, even the temperature of the rain that falls there.
Thomas C

Rainforest - Wikipedia, the free encyclopedia - 0 views

  • On January 18, 2007, FUNAI reported that it had confirmed the presence of 67 different uncontacted tribes in Brazil, up from 40 in 2005. With this addition, Brazil has now overtaken the island of New Guinea as the country having the largest number of uncontacted tribes.[19] The province of Irian Jaya or West Papua in the island of New Guinea is home to an estimated 44 uncontacted tribal groups.[20]
  • From 40 to 75% of all species on Earth are indigenous to the rainforests.[1] It has been estimated that many millions of species of plants, insects, and microorganisms are still undiscovered. Tropical rainforests have been called the "jewels of the Earth", and the "world's largest pharmacy", because of the large number of natural medicines discovered there.[2] Rainforests are also responsible for 28% of the worlds oxygen turn over, often misunderstood as oxygen production,[3] processing it through photosynthesis from carbon dioxide and through breathing to carbon dioxide.
    • Thomas C
       
      report showing.
  • Rainforests are forests characterized by high rainfall, with definitions setting minimum normal annual rainfall between 1750–2000 mm (68-78 inches).
Shashank A

Species in the Rainforest - 0 views

  • Tropical rainforests are the most diverse ecosystems on earth. A four-square mile patch of rainforest contains as many as 1500 species of flowering plants, 750 species of trees, 125 species of mammals, 400 species of birds, 100 species of reptiles, 60 species of amphibians, and 150 species of butterflies. More than 50% of the world's plant and animal species inhabit the 7% of the world that is covered in rainforest.
    • Shashank A
       
      This is great infrmation!!!
  • Some forests in Southeast Asia have been around for more than 100 million years, when the dinosaurs roamed the Earth. During the Ice Ages, the last of which occurred about 10,000 years ago, the frozen areas of the North and South Poles spread over much of the earth, causing huge numbers of extinctions.
    • Shashank A
       
      Very intresting!!!
  • While there are many species of plants in a square-mile of tropical rainforest, there may only be one or two of each. In addition as most of the species are found nowhere else on Earth, by removing one plant or animal, the fragile ecosystem would be threatened, and the species may be forced into extinction.
Elizabeth B

Tiger - Wikipedia, the free encyclopedia - 0 views

  • Highly adaptable, tigers range from the Siberian taiga, to open grasslands, to tropical mangrove swamps. They are territorial and generally solitary animals, often requiring large contiguous areas of habitat that support their prey demands. This, coupled with the fact that they are endemic to some of the more densely populated places on earth, has caused significant conflicts with humans. Of the nine subspecies of modern tiger, three are extinct and the remaining six are classified as endangered, some critically so. The primary direct causes are habitat destruction and fragmentation, and hunting. Their historical range, which once reached from Mesopotamia and the Caucasus through most of South and East Asia, has been radically reduced. While all surviving species are under formal protection, poaching, habitat destruction and inbreeding depression continue to be threats.
  • Tigers are perhaps the most recognisable of all the cats (with the possible exception of the lion). They typically have rusty-reddish to brown-rusty coats, a whitish medial and ventral area, a white "fringe" that surrounds the face, and stripes that vary from brown or gray to pure black.
  • Main article: Golden tabby A rare golden tabby/strawberry tiger at the Buffalo Zoo. In addition, another recessive gene may create a very unusual "golden tabby" colour variation, sometimes known as "strawberry." Golden tabby tigers have light gold fur, pale legs and faint orange stripes. Their fur tends to be much thicker than normal.[50] There are extremely few golden tabby tigers in captivity, around 30 in all. Like white tigers, strawberry tigers are invariably at least part Bengal. Some golden tabby tigers, called heterozygous tigers, carry the white tiger gene, and when two such tigers are mated, can produce some stripeless white offspring. Both white and golden tabby tigers tend to be larger than average Bengal tigers.
  •  
    Highly adaptable, tigers range from the Siberian taiga, to open grasslands, to tropical mangrove swamps. They are territorial and generally solitary animals, often requiring large contiguous areas of habitat that support their prey demands. This, coupled with the fact that they are endemic to some of the more densely populated places on earth, has caused significant conflicts with humans. Of the nine subspecies of modern tiger, three are extinct and the remaining six are classified as endangered, some critically so. The primary direct causes are habitat destruction and fragmentation, and hunting. Their historical range, which once reached from Mesopotamia and the Caucasus through most of South and East Asia, has been radically reduced. While all surviving species are under formal protection, poaching, habitat destruction and inbreeding depression continue to be threats.
Katherine G

Ocelot - Wikipedia, the free encyclopedia - 0 views

shared by Katherine G on 17 Sep 09 - Cached
  • The Ocelot is mostly nocturnal and very territorial. It will fight fiercely, sometimes to the death, in territorial disputes. In addition, the Ocelot marks its territory with especially pungent urine. Like most felines, it is solitary, usually meeting only to mate
    • Katherine G
       
      VERY CUTE!
  •  
    ocelot
Avinash X

Rainforest Canopy-Introduction - 0 views

  • The billions of leaves of the canopy, acting as miniature solar panels, provide the source of power for the forest by converting sunlight to energy through photosynthesis. Photosynthesis is the process by which plants convert atmospheric carbon dioxide and water into oxygen and simple sugars. Since the rate of photosynthesis of canopy trees is so high, these plants have a higher yield of fruits, seeds, flowers, and leaves which attract and support a wide diversity of animal life. Besides attracting a broad array of wildlife, the canopy plays an important role in regulating regional and global climate because it is the principal site of the interchange of heat, water vapor, and atmospheric gases. In addition to collecting solar energy and regulating the climate, the canopy shields the understory from harsh and intense sunlight, drying winds, and heavy rainfall, and retains the moisture of the forest below. Thus the forest interior is a far less volatile environment than the upper parts of the canopy ceiling. The interior region is protected from the extremes of the canopy: temperature fluctuations, damaging solar radiation, and strong winds. Light levels are diffuse and subdued, the humidity is higher and more constant, and there is very little direct sunlight in the lower canopy.
    • Avinash X
       
      leaves and their role in the ecosystem
  • The overstory is characterized by scattered emergent trees that tower above the rest of the canopy, the tops of some species exceeding 210 feet (65 m). Below the overstory trees, the canopy stretches for vast distances, seemingly unbroken when observed from an airplane. However, despite overlapping tree branches, canopy trees rarely interlock or even touch. Instead they are separated from one another by a few feet. Why the branches of these trees do not touch is still a mystery, but it is thought that it might serve as protection from infestations from tree-eating caterpillars and tree diseases like leaf blight. To survive, canopy dwellers must have the ability to negotiate these gaps by climbing, leaping, gliding, or flying.
    • Avinash X
       
      overstory
  •  
    All about the canopy
Shaian R

Dwarf - Wikipedia, the free encyclopedia - 0 views

  • A Dwarf is a creature from Germanic mythologies, fairy tales, fantasy fiction, and role-playing games. It usually has magical talents, often involving metallurgy. The original concept of Dwarves is very difficult to determine. Sources have gradually given Dwarves more comical and superstitious roles[1]. Dwarves were certainly humanoid, but sources differ over their lifestyles, and their similarity to Elves. They may have had a strong associations with death[2][3]: paled skin; dark hair; connections with the earth; their role in mythology. They followed animistic traditions, showing similarities to such concepts of the dead. They were similar to others from the 'Vættir' family, such as Elves.[2]
    • Shaian R
       
      I never knew dwarves can be so intresting
    • Elizabeth B
       
      yeah i agree
    • Shaian R
       
      this looks like a painting
  • Rackham. Grouping Mythological creature Fairy Country Northern Europe
  • ...3 more annotations...
  • Traditionally, the plural of dwarf was "dwarfs", especially when referring to actual humans with dwarfism, but ever since J. R. R. Tolkien used Dwarves in his fantasy novel The Hobbit, the subsequent The Lord of the Rings (often published in three volumes), and the posthumously published The Silmarillion, the plural forms "dwarfs" has been replaced by "Dwarves". Tolkien, who was fond of low philological jests, also suggested two other plural forms, Dwarrows and Dwerrows; but he never used them in his writings, apart from the name 'Dwarrowdelf', the Western name for Khazad-dûm or Moria, which was, inside his fiction, a calque of the Westron name Phurunargian. His Dwarves' name for themselves was Khazâd, singular probably Khuzd. 'Dwarrows' is the Middle English plural of 'Dwerg' or 'Dwerf' ('Dwarf'), and derives from the Old English 'Dweorgas', plural of 'Dweorh' or 'Dweorg'.
  • Dwarves in Tolkien are long-lived, living nearly four times the age of man (about 250 years), but are not prolific breeders, having children rarely and spaced far apart, and having few women among them. Dwarvish children are cherished by their parents, and are defended at all costs from their traditional enemies, such as Orcs. A longstanding enmity between normal Dwarves and Elves is also a staple of the racial conception.
  • A long standing source of interest (and humour) comes from the allusion of Tolkien to female Dwarves having beards, which was borrowed by other writers. Essentially, Tolkien developed a rational explanation for why female Dwarves are never encountered in the story, by elaborating that female Dwarves never travel abroad, and look so much like Dwarf men that visitors to Dwarf cities cannot immediately spot them. In addition to being rare creatures they are perhaps not often featured in many fantasy milieu for this reason. Tolkien writes his Dwarf-women are "in voice and appearance, and in garb if they must go on a journey, so like to dwarf-men that the eyes and ears of the other peoples cannot tell them apart." This, he writes, leads to the belief that Dwarves grow out of stone[15]. In The Chronicles of Narnia, in fact, C. S. Lewis, who was a friend of Tolkien, describes his Dwarfs as doing just this, and it is possible that Tolkien was ribbing Lewis in making this point. Interestingly, though, Lewis' all-male Dwarfs are capable of mixing with humans to make half-Dwarfs, such as Doctor Cornelius, the tutor of Prince Caspian (In the 2008 adaption of Prince Caspian, female Dwarfs are shown as archers along with the males, though these female Dwarfs are shown to be beardless). In later writings, Tolkien directly states that his female Dwarves have beards "from the beginning of their lives", as do the males[16].
Gurupranav G

Poverty in Asia - 0 views

  • Poverty in Asia,caste and progress. In this FAO Poverty In Asia map, Darker is Poorer but some light areas are just 'no data' - see our Poor in a Rich World page.A majority of the worlds poorest people today are in Asia - partly because it holds a majority of the world's population. Of course some Asian countries like Japan and South Korea are not as poor as others like India and Cambodia, with Asian poverty being concentrated in South Asia.  Asian poverty1. Poverty in some Asian countries is largely due to the pressure of population growth on scarce resources and inadequate governments allowing strongly negative caste discrimination. 2. Education, medicine, clean water and sanitation are often inadequate also3. In some Asian countries land ownership being problematic also encourages poverty. 4. Asia till recently attracted less foreign investment than Latin America, but more of it has been stable longer-term European investment. Some of Asia has shown good progress on poverty in recent years, like China and South Korea. (in China noteably helped partly by controls on population growth)  But Asia, holding the largest populations, still has many extreme poor. The current world recession is also causing family remittances from overseas workers or migrant workers to fall. As more migrant workers lose jobs in Western Europe and the USA, remittances to their poor families in Central Asia are being hit hard. And the likely prospect for aid in the short term is a sharp fall.
    • Gurupranav G
       
      Great piece of info on poverty in asia
  • # The new green selected food crops have been helping in reducing poverty in Asia, but the newer genetically modified food crops and their monopoly providers seem to have been unhelpful to date ? See South Asia Land Management  - SACEP pdf 1.5 mb # For one small charity trying to do some good extreme-poverty work in India today, see SEED at seedkolkata.org or for another similar good small extreme-poverty charity working in Cambodia, see the Sao Sara Foundation at ssfcambodia.org Good small charities like these often lack the money they need to do as much as they would like. # For facts about individual countries, see NationMaster
    • Gurupranav G
       
      An addition to the info you see at the top. Quite valuable maybe you should take a good look at it.
  •  
    Poverty in Asia on Japan, South Korea, China, India and Cambodia, and poverty in South Asia
  •  
    A majority of the worlds poorest people today are in Asia - partly because it holds a majority of the world's population. Of course some Asian countries like Japan and South Korea are not as poor as others like India and Cambodia, with Asian poverty being concentrated in South Asia.
Gurupranav G

Microfinance - Wikipedia, the free encyclopedia - 0 views

  • Microfinance is the provision of financial services to low-income clients, including consumers and the self-employed, who traditionally lack access to banking and related services. More broadly, it is a movement whose object is "a world in which as many poor and near-poor households as possible have permanent access to an appropriate range of high quality financial services, including not just credit but also savings, insurance, and fund transfers."[1] Those who promote microfinance generally believe that such access will help poor people out of poverty
    • Gurupranav G
       
      t definition on microfinance and how it helps the needy
  • Traditionally, banks have not provided financial services, such as loans, to clients with little or no cash income. Banks incur substantial costs to manage a client account, regardless of how small the sums of money involved. For example, the total profit for a bank from delivering 100 loans worth $1,000 each will not differ greatly from the revenue that results from delivering one loan of $100,000. But the fixed cost of processing loans of any size is considerable as assessment of potential borrowers, their repayment prospects and security; administration of outstanding loans, collecting from delinquent borrowers, etc., has to be done in all cases. There is a break-even point in providing loans or deposits below which banks lose money on each transaction they make. Poor people usually fall below that breakeven point. In addition, most poor people have few assets that can be secured by a bank as collateral. As documented extensively by Hernando de Soto and others, even if they happen to own land in the developing world, they may not have effective title to it.[2] This means that the bank will have little recourse against defaulting borrowers. Seen from a broader perspective, the development of a healthy national financial system has long been viewed as a catalyst for the broader goal of national economic development (see for example Alexander Gerschenkron, Paul Rosenstein-Rodan, Joseph Schumpeter, Anne Krueger ). However, the efforts of national planners and experts to develop financial services for most people have often failed in developing countries, for reasons summarized well by Adams, Graham & Von Pischke in their classic analysis 'Undermining Rural Development with Cheap Credit'.[3] Because of these difficulties, when poor people borrow they often rely on relatives or a local moneylender, whose interest rates can be very high. An analysis of 28 studies of informal moneylending rates in 14 countries in Asia, Latin America and Africa concluded that 76% of moneylender rates exceed 10% per month, including 22% that exceeded 100% per month. Moneylenders usually charge higher rates to poorer borrowers than to less poor ones.[4] While moneylenders are often demonized and accused of usury, their services are convenient and fast, and they can be very flexible when borrowers run into problems. Hopes of quickly putting them out of business have proven unrealistic, even in places where microfinance institutions are active.[citation needed] Over the past centuries practical visionaries, from the Franciscan monks who founded the community-oriented pawnshops of the 15th century, to the founders of the European credit union movement in the 19th century (such as Friedrich Wilhelm Raiffeisen) and the founders of the microcredit movement in the 1970s (such as Muhammad Yunus) have tested practices and built institutions designed to bring the kinds of opportunities and risk-management tools that financial services can provide to the doorsteps of poor people.[5] While the success of the Grameen Bank (which now serves over 7 million poor Bangladeshi women) has inspired the world, it has proved difficult to replicate this success. In nations with lower population densities, meeting the operating costs of a retail branch by serving nearby customers has proven considerably more challenging. Hans Dieter Seibel, board member of the European Microfinance Platform, is in favour of the group model. This particular model (used by many Microfinance institutions) makes financial sense, he says, because it reduces transaction costs. Microfinance programmes also need to be based on local funds. Local Roots Although much progress has been made, the problem has not been solved yet, and the overwhelming majority of people who earn less than $1 a day, especially in the rural areas, continue to have no practical access to formal sector finance. Microfinance has been growing rapidly with $25 billion currently at work in microfinance loans.[6] It is estimated that the industry needs $250 billion to get capital to all the poor people who need it.[6] The industry has been growing rapidly, and concerns have arisen that the rate of capital flowing into microfinance is a potential risk unless managed well.[7]
    • Gurupranav G
       
      Great info on the challenges of microfinance, though it may be extremely helpful. Not bad!
Katie Day

Nicholas Kristof -- Op-Ed - Moonshine or the Kids? - NYTimes.com - 0 views

  • There’s an ugly secret of global poverty, one rarely acknowledged by aid groups or U.N. reports. It’s a blunt truth that is politically incorrect, heartbreaking, frustrating and ubiquitous: It’s that if the poorest families spent as much money educating their children as they do on wine, cigarettes and prostitutes, their children’s prospects would be transformed. Much suffering is caused not only by low incomes, but also by shortsighted private spending decisions by heads of households.
  • Two M.I.T. economists, Abhijit Banerjee and Esther Duflo, found that the world’s poor typically spend about 2 percent of their income educating their children, and often larger percentages on alcohol and tobacco: 4 percent in rural Papua New Guinea, 6 percent in Indonesia, 8 percent in Mexico. The indigent also spend significant sums on soft drinks, prostitution and extravagant festivals.
  •  
    How the poorest families all around the world often spend money on alcohol and tobacco instead of education for their children.
1 - 16 of 16
Showing 20 items per page