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Hydrothermal ecosystems in Yellowstone National Park host microbial communities that include Archaea and Bacteria on the deepest branches of the phylogenetic tree of life. These chemotrophic organisms occur in the highest temperature portions of these ecosystems at temperatures greater than those where photosynthetic microbes thrive. In some hot spring outflow channels, strictly chemotrophic communities form abundant, thick, streamer-like biofilms that lack bright pigments. Where these microbial streamers are conspicuous, they are easily sampled for genomic, biogeochemical and biomarker studies. This project investigated both composition and biodiversity of streamer-forming communities, the geochemical controls on their distributions as well as aspects of their physiologies.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Containing original articles on timely topics, full reports of important cases, and a quarterly digest of all recent criminal cases, American and English.
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