But in a few rare cases—such as ecosystems found in rocks deep beneath the ground—bacterial producers can use the energy found in a gas called hydrogen sulfide, that is found within the ...

In most ecosystems, the ultimate source of all energy is the sun. Plants and microorganisms on land and in the sea use photosynthesis to produce biomass (living material): they absorb specific ...

D. L. DeAngelis, Energy Flow, Nutrient Cycling, and Ecosystem Resilience, Ecology, Vol. 61, No. 4 (Aug., 1980), pp. 764-771 ...

An annual energy budget is presented for Bear Brook, a small undisturbed second-order stream in northeastern United States. The ecosystem approach, in which all input and output fluxes of potential ...