Filters: Tags: semi-arid lands (X) > partyWithName: Jayne Belnap (X)
1 result (8ms)|
Filters
Date Range
Extensions Types Categories |
Biological soil crusts can be the dominant source of N for arid land ecosystems. We measured potential N fixation rates biweekly for 2 years, using three types of soil crusts: (1) crusts whose directly counted cells were >98% Microcoleus vaginatus (light crusts); (2) crusts dominated by M. vaginatus, but with 20% or more of the directly counted cells represented by Nostoc commune and Scytonema myochrous (dark crusts); and (3) the soil lichen Collema sp. At all observation times, Collema had higher nitrogenase activity (NA) than dark crusts, which had higher NA than light crusts, indicating that species composition is critical when estimating N inputs. In addition, all three types of crusts generally responded in...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Biology and Fertility of Soils,
Cryptobiotic crusts,
Microbiotic crusts,
Microphytic crusts,
Nitrogen budgets,
|
