An ecosystem consists of the biological
community that occurs in some locale, and the physical and chemical factors
that make up its non-living or abiotic environment. There are many examples
of ecosystems -- a pond, a forest, an estuary, a grassland. The boundaries
are not fixed in any objective way, although sometimes they seem obvious,
as with the shoreline of a small pond. Usually the boundaries of an ecosystem
are chosen for practical reasons having to do with the goals of the particular
study.
Martin Burrett on 11 Jun 12A UK site which encourages exploration and outdoor activities by setting missions ranging from finding or photographing things from nature to going pond dipping to write reports about a location. Earn points for each mission completed. http://ictmagic.wikispaces.com/PSHE%2C+RE%2C+Citizenship%2C+Geography+%26+Environmental
