Filters: Tags: microphytic crusts (X) > partyWithName: Evans, R David (X)
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Anthropogenic activity is causing dramatic changes in the nitrogen (N) cycle in many ecosystems. Most research has focused on the increase in N input caused by atmospheric deposition and invasion of N-fixing species, and on their effects on resource availability and species composition. However, in contrast to many ecosystems experiencing large increases in N input, many arid ecosystems are experiencing loss of nutrients due to land-use change. An important component of many arid ecosystems on a worldwide basis is the microbiotic crust, a biological soil crust composed of lichens, cyanobacteria, mosses, and algae. Nitrogen fixation by lichens and cyanobacteria comprising the crust is the primary source of N input...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Canyonlands National Park,
Ecology,
Utah,
cryptogamic crusts,
land-use change,
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