Home About us MoEF Contact us Sitemap Tamil Website  
About Envis
Whats New
Research on Microbes
Microbiology Experts
Online Submission

Site Visitors

blog tracking

Ecology Letters
Vol. 17, No. 2, 2014; Page: 155 - 164

Climate change alters ecological strategies of soil bacteria

Sarah E. Evans, Matthew D. Wallenstein

Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, USA.


The timing and magnitude of rainfall events are expected to change in future decades, resulting in longer drought periods and larger rainfall events. Although microbial community composition and function are both sensitive to changes in rainfall, it is unclear whether this is because taxa adopt strategies that maximise fitness under new regimes. We assessed whether bacteria exhibited phylogenetically conserved ecological strategies in response to drying-rewetting, and whether these strategies were altered by historical exposure to experimentally intensified rainfall patterns. By clustering relative abundance patterns, we identified three discrete ecological strategies and found that tolerance to drying-rewetting increased with exposure to intensified rainfall patterns. Changes in strategy were primarily due to changes in community composition, but also to strategy shifts within taxa. These moisture regime-selected ecological strategies may be predictable from disturbance history, and are likely to be linked to traits that influence the functional potential of microbial communities.

Keywords: Birch effect; drying-rewetting; historical legacy; microbial life history; moisture niche; moisture stress; precipitation manipulation; rainfall pulses; rainfall timing; tallgrass prairie



Copyright © 2005 ENVIS Centre ! All rights reserved
This site is optimized for 1024 x 768 screen resolution