Land-use drives energy dynamics of boreal lake food webs
Lake ecosystems can receive high inputs of terrestrial organic matter (t-OM) that microbes make available to higher trophic level consumers. A research group examined terrestrial reliance of 19 consumer groups from 35 boreal lakes using stable isotopes of hydrogen. According to the study, benthic macroinvertebrates and the benthivorous fish reliance to terrestrial energy (allochthony) was higher compared to pelagic plankton and planktivorous fish. Consumer allochthony decreased along the environmental gradient from forested to agricultural catchments, likely due to alteration in the origin of lake organic matter.
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Lake ecosystems can receive high inputs of terrestrial organic matter (t-OM) that microbes make available to higher trophic level consumers. A research group examined terrestrial reliance of 19 consumer groups from 35 boreal lakes using stable isotopes of hydrogen. According to the study, benthic macroinvertebrates and the benthivorous fish reliance to terrestrial energy (allochthony) was higher compared to pelagic plankton and planktivorous fish. Consumer allochthony decreased along the environmental gradient from forested to agricultural catchments, likely due to alteration in the origin of lake organic matter.
