The role of amoeboid protists and the microbial community in moss-rich terrestrial ecosystems: Biogeochemical implications for the carbon budget and carbon cycle, especially at higher latitudes

LDEO Publication: 
Publication Type  Journal Article
Year of Publication  2008
Authors  Anderson, O. R.
Journal Title  Journal of Eukaryotic Microbiology
Volume  55
Issue  3
Pages  145-150
Journal Date  May-Jun
ISBN Number  1066-5234
Accession Number  ISI:000255532400002
LDEO Publication Number  7088
Key Words  bacterial-based microbial communities; boreal forests; climate change; global warming; heterotrophic protists; microbial respiratory co2; terrestrial-atmospheric co2 dynamics; tundra; arctic tundra; boreal forest; taimyr peninsula; co2 exchange; cell-volu

Moss-rich terrestrial communities are widely distributed in low- and high-latitude environments, covering vast surface areas in the boreal forests and tundra. The microbial biota in these organic-rich communities may contribute substantially to the carbon budget of terrestrial communities and the carbon cycle on a global scale. Recent research is reported on the carbon content of microbial communities in some temperate and high-latitude moss communities. The total carbon content and potential respiratory carbon dioxide (CO2) efflux is reported for bacteria, microflagellates, naked amoebae, and testate amoebae within sampling sites at a northeastern forest and the tundra at Toolik, Alaska. Quantitative models of the predicted total CO2 efflux from the microbes, based on microscopic observations and enumeration of the microbiota in samples from the research sites, are described and predictions are compared with published field-based data of CO2 efflux. The significance of the predictions for climate change and global warming are discussed.


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URL  <Go to ISI>://000255532400002
DOI  DOI 10.1111/j.1550-7408.2008.00319.x