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Jérôme OLLIER

Impact chains for the deep seafloor: assessing pressures footprint under limited knowle... - 0 views

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    Pressures on the marine environment threaten biodiversity, ecosystem functions and services. Current marine environmental policies, such as the European Marine Strategy Framework Directive, require the assessment of combined effects and the application of ecosystem-based management approaches to maintain or achieve Good Environmental Status (GES) of marine ecosystems. We mapped the major activities and pressures affecting deep-sea benthic habitats in the mainland component of the Portuguese EEZ to assess their combined effects and support decision-making on management and conservation. Activities related to marine traffic, fisheries, and climate change processes are among the most prevalent in the study area. As a data-poor case study, most of the pressure layers were only partially mapped due to a lack of information or the inadequacy of the available data on activities to derive suitable proxies of pressure intensity. Pressures related to chemical changes, chemicals and other pollutants were the most widespread, while abrasion and damage were the most geographically limited. Endogenic pressures dominate in bathyal benthic habitats and decrease their prevalence with depth, while exogenic pressures are more widespread in the abyss than in the bathyal area. Benthic habitats in the bathyal zone, closer to the 200-meter bathymetric contour, consistently exhibited higher combined effect scores, suggesting higher risk of potential impacts on these ecosystem components. Research directed towards these areas is required to assess the state of these habitats and develop conservation and restoration measures, if necessary, to achieve GES. A continuous support for open-access databases containing high-quality, standardized, and harmonized marine data is crucial for future assessments of the combined effects of human pressures on deep-sea ecosystems.
xiaobaicai

Pressure Fryer For Home Use - 0 views

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    We specialize in the manufacture and sale Pressure Fryer For Home Use,If you wank know please contact us
Jérôme OLLIER

ITF Organizes Dockers' Unions to Pressure DP World - @Mar_Ex - 0 views

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    ITF Organizes Dockers' Unions to Pressure DP World.
Jérôme OLLIER

Via @WhySharksMatter - COVID-related anthropause highlights the impact of marine traffi... - 0 views

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    The COVID-19 pandemic and its lock-down measures have resulted in periods of reduced human activity, known as anthropause. While this period was expected to be favorable for the marine ecosystem, due to a probable reduction of pollution, shipping traffic, industrial activity and fishing pressure, negative counterparts such as reduced fisheries surveillance could counterbalance these positive effects. Simultaneously, on-land pressure due to human disturbance and tourism should have drastically decreased, potentially benefiting land-breeding marine animals such as seabirds. We analyzed 11 breeding seasons of data on several biological parameters of little penguins from a popular tourist attraction at Phillip Island, Australia. We investigated the impact of anthropogenic activities on penguin behavior during the breeding season measured by (1) distribution at sea, (2) colony attendance, (3) isotopic niche (4) chick meal mass, and (5) offspring investment against shipping traffic and number of tourists. The 2020 lock-downs resulted in a near absence of tourists visiting the Penguin Parade®, which was otherwise visited by 800,000+ visitors on average per breeding season. However, our long-term analysis showed no effect of the presence of visitors on little penguins' activities. Surprisingly, the anthropause did not trigger any changes in maritime traffic intensity and distribution in the region. We found inter- and intra-annual variations for most parameters, we detected a negative effect of marine traffic on the foraging efficiency. Our results suggest that environmental variations have a greater influence on the breeding behavior of little penguins compared to short-term anthropause events. Our long-term dataset was key to test whether changes in anthropogenic activities affected the wildlife during the COVID-19 pandemic.
Jérôme OLLIER

Inside the Middle East port that the US wants to host aircraft carriers as it pressures... - 0 views

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    Inside the Middle East port that the US wants to host aircraft carriers as it pressures Iran.
Jérôme OLLIER

Somali Pirates Flee Captured Dhow as EU Naval Force Applies Pressure from the Air and t... - 0 views

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    On Saturday 26 April the master of a dhow spoke of his relief after 6 armed pirates, who had taken his vessel and crew hostage, fled the scene after sightings of an EU Naval Force Spanish maritime patrol and reconnaissance (MPRA) aircraft.
Peter Morriss

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    Timely financial assistance is assured when you apply to no upfront fee bad credit loans to take care of your emergency financial requirements. With a year to pay back the loan in full any borrower can feel comfortable to seek this loan without any pressure. The ease and convenience with which one can get the loan sanctioned, adds to its advantages.
Steve Richards

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    When you need a loan and to ease budgetary pressure if you want an extended repayment period, instant cash payday loans is the best option. You get up to 30 days period for loan repayment.
Jérôme OLLIER

Via @IAMSPOnline - Tightening the Chain: Implementing a Strategy of Maritime Pressure i... - 0 views

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    The U.S. military has a problem in the Western Pacific: the tyranny of distance and time. Delivering military force across the vast Pacific Ocean has never been easy, even for a country as blessed in resources and ingenuity as the United States. The problem has worsened as America's chief regional rival, China, has improved its ability to harm American interests quickly and with limited forewarning. Seventy years after Mao Zedong proclaimed the People's Republic of China, China's military capabilities have matured to the point where, if directed by the Chinese Communist Party (CCP), the People's Liberation Army (PLA) could launch a rapid attack to change the status quo, including territorial seizure, before the United States could meaningfully respond, thus presenting Washington with a fait accompli. American forces located outside the conflict area would have to penetrate China's anti-access/area-denial (A2/AD) network to restore the status quo ex-ante, a daunting proposition. Under these circumstances, Washington might face the unenviable choice of doing nothing or escalating to higher levels of violence. Either way, the national interests of both the United States and its closest allies would suffer dramatically.
Jérôme OLLIER

Theft and extortion common experiences, say seafarers - @cardiffuni - 0 views

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    Seafarers have spoken of the pressures caused by corrupt practices when they arrive at some ports.
Jérôme OLLIER

Changes in Underwater Noise and Vessel Traffic in the Approaches to Halifax Harbor, Nov... - 0 views

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    Over the past two years, researchers at Fisheries and Oceans Canada have been running an acoustic monitoring project at multiple study sites throughout Nova Scotia, Canada to investigate baleen whale presence and levels of underwater noise. At the onset of the COVID-19 pandemic, a passive acoustic monitor (PAM) was in place in the study site located in the approaches to Halifax Harbor, a major Canadian port. This provided a unique opportunity to determine if changes in vessel noise levels occurred after pandemic restrictions were put in place. To investigate this, we analyzed and compared acoustic data collected from March 28 to April 28 and August 6 to October 22 in both 2019 and 2020. We also investigated possible changes in vessel traffic from February 1 through April 28 and July 1 through July 28 in 2019 and 2020 using terrestrial-based automatic identification system (AIS) data provided by the Canadian Coast Guard and cargo information provided by the Port of Halifax. The acoustic data were analyzed in 1/3 octave frequency bands. For the 89.1-112 Hz frequency band, we found an 8.4 dB increase in the daily minimum sound pressure level (SPL) in April 2020 compared to April 2019 due the presence of a large crane vessel stationed near the mooring site. For the period of August to October, we found an approximately 1.7 dB reduction in the same metric from 2019 to 2020. The most noticeable change in vessel composition was the dramatic decrease in the number and occurrence of pleasure craft in July 2020 compared to the same period in 2019. While this analysis looked at only a single PAM and a limited amount of data, we observed changes in sound levels in the frequency band known to be associated with shipping as well as changes in vessel traffic; we conclude that these observed changes may be related to pandemic restrictions.
Jérôme OLLIER

#coronavirus - Slower Ship Speed in the Bahamas Due to #Covid19 Produces a Dramatic Red... - 0 views

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    As underwater noise from ship traffic increases, profound effects on the marine environment highlight the need for improved mitigation measures. One measure, reduction in ship speed, has been shown to be one of the key drivers in reducing sound source levels of vessels. In 2017, a study began to assess the impacts of increasing commercial shipping traffic on sperm whales in Northwest Providence Channel, northern Bahamas, an international trade route that primarily serves the southeast US. Ship data were collected from an Automatic Identification System (AIS) station combined with recordings from an acoustic recorder to measure underwater sound levels and to detect the presence of sperm whales. Here we analyze a subset of these data to opportunistically investigate potential changes in ship traffic before and during the COVID-19 pandemic. These data span one calendar year from October 2019 to October 2020. A pre-COVID-19 dataset of 121 days, from a recorder approximately 2 km from the shipping route was compared to a 134-day dataset collected during COVID-19 from the same site, comprising 2900 and 3181 ten-minute recordings, respectively. A dramatic decrease in ocean noise levels concurrent with changes in shipping activity occurred during the pandemic. The mean pre-COVID-19 power density level in the 111-140 Hz 1/3-octave band was 88.81 dB re 1 μPa (range 81.38-100.90) and decreased to 84.27 dB re 1 μPa (range 78.60-99.51) during COVID-19, equating to a 41% reduction in sound pressure levels (SPL). After differences in seasonal changes in wind speed were accounted for, SPL decreased during the pandemic by 3.98 dB (37%). The most notable changes in ship activity were significantly reduced vessel speeds for all ship types and fewer ships using the area during the pandemic. Vessel speed was highly correlated to SPL and the only ship-based variable that predicted SPLs. Despite the opportunistic nature [i.e., not a standard before-after-control-impact (BACI) stud
Jérôme OLLIER

Methods to get more information from sparse vessel monitoring systems data - @FrontMari... - 0 views

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    Vessel Monitoring Systems (VMS) and other vessel tracking data have been used for many years to map the distribution of fishing activities. Mapping areas with low levels of fishing activity can be of particular interest; for example to avoid conflicts between fishing and other ocean uses like offshore renewable energy or to protect relatively pristine ecosystems from increasing fishing pressure. A particular problem when trying to delineate areas that are lightly fished, is the relative sparsity of vessel monitoring data in these areas. This paper explores three novel methods for estimating the distribution of fishing activity from VMS data, with particular focus on lightly impacted areas. The first new method divides the area of interest into a nested grid with varying cell sizes (depending on the density of data at each location); the second new method uses Voronoi diagrams to define polygons around observations and the third method applies a local regression to generate a smooth map of fishing intensity. The new methods are compared with two established methods: applying spatial grids and interpolating fishing tracks. The track interpolation method generally performs better than any of the new methods, however it is not always possible or appropriate to apply track interpolation; in those cases the local regression method is the best alternative.
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