Recent Comments. 1  KDM: Many modern vehicles have specific lifting points where the jack must be placed.... 2  Philip Werner: I definitely can't swing my leg over the back bag. Have to kick my foot as high... 3  Tom Bebee: Just wondering are there any issues with swinging your leg over the bag when mou...
From Wikipedia, the free encyclopedia. Stream metabolism, also known as aquatic ecosystem metabolism in lakes, can be expressed as net ecosystem productivity (NEP), the difference between gross primary productivity (GPP) and ecosystem respiration (ER).
Energy transformations and biogeochemical cycling are the main processes that occur in an ecosystem. Part of what sustains an ecosystem is the constant interchange of matter between its living (biotic) and non-living or 'physical' (abiotic) components.