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REGULAR ARTICLE Plant phenology and life span influence soil pool

Plant phenology and life span influence soil pool
dynamics: Bromus tectorum invasion of perennial
C3C4 grass communities
Elizabeth Carol Adair & Ingrid C. Burke
Received: 7 January 2010 /Accepted: 22 April 2010 /Published online: 14 May 2010
# The Author(s) 2010. This article is published with open access at Springerlink.com
Abstract In water-limited ecosystems, small rainfall
events can have dramatic impacts on microbial
activity and soil nutrient pools. Plant community
phenology and life span also affect soil resources by
determining the timing and quantity of plant nutrient
uptake, storage, and release. Using the replacement of
C3C4 perennial grasses by the invasive annual grass
Bromus tectorum as a case study, we investigated the
influence of phenology and life span on pulse
responses and sizes of soil carbon (C) and nitrogen
(N) pools. We hypothesized that available and
microbial C and N would respond to small rainfall
events and that B. tectorum invasion would increase


Source: Adair, E. Carol - National Center for Ecological Analysis and Synthesis, University of California at Santa Barbara


Collections: Environmental Sciences and Ecology