Document Detail


Warming reduces the growth and diversity of biological soil crusts in a semi-arid environment: implications for ecosystem structure and functioning.
MedLine Citation:
PMID:  23045707     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Biological soil crusts (BSCs) are key biotic components of dryland ecosystems worldwide that control many functional processes, including carbon and nitrogen cycling, soil stabilization and infiltration. Regardless of their ecological importance and prevalence in drylands, very few studies have explicitly evaluated how climate change will affect the structure and composition of BSCs, and the functioning of their constituents. Using a manipulative experiment conducted over 3 years in a semi-arid site from central Spain, we evaluated how the composition, structure and performance of lichen-dominated BSCs respond to a 2.4°C increase in temperature, and to an approximately 30 per cent reduction of total annual rainfall. In areas with well-developed BSCs, warming promoted a significant decrease in the richness and diversity of the whole BSC community. This was accompanied by important compositional changes, as the cover of lichens suffered a substantial decrease with warming (from 70 to 40% on average), while that of mosses increased slightly (from 0.3 to 7% on average). The physiological performance of the BSC community, evaluated using chlorophyll fluorescence, increased with warming during the first year of the experiment, but did not respond to rainfall reduction. Our results indicate that ongoing climate change will strongly affect the diversity and composition of BSC communities, as well as their recovery after disturbances. The expected changes in richness and composition under warming could reduce or even reverse the positive effects of BSCs on important soil processes. Thus, these changes are likely to promote an overall reduction in ecosystem processes that sustain and control nutrient cycling, soil stabilization and water dynamics.
Authors:
Cristina Escolar; Isabel Martínez; Matthew A Bowker; Fernando T Maestre
Related Documents :
19326787 - Reconsidering domestication of legumes versus cereals in the ancient near east.
24234877 - Reciprocal effects of platinum and lead on the water household of poplar cuttings.
24498737 - Impact of planting date and varietal maturity on tarnished plant bug (hemiptera: mirida...
15882657 - Use of petunia to unravel plant meristem functioning.
16662297 - Ethylene production and leaflet abscission of three peanut genotypes infected with cerc...
6495757 - Determination of metabolites of xenobiotics in the bile of fish from polluted waterways.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Philosophical transactions of the Royal Society of London. Series B, Biological sciences     Volume:  367     ISSN:  1471-2970     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-10-09     Completed Date:  2013-03-08     Revised Date:  2013-12-04    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  3087-99     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Bryophyta / chemistry,  growth & development
Carbon / chemistry
Chlorophyll / chemistry
Desert Climate*
Ecosystem*
Fluorescence
Global Warming*
Lichens / chemistry,  growth & development
Mediterranean Region
Rain
Soil / chemistry*
Soil Microbiology*
Spain
Temperature
Water / chemistry
Grant Support
ID/Acronym/Agency:
242658//European Research Council
Chemical
Reg. No./Substance:
0/Soil; 059QF0KO0R/Water; 1406-65-1/Chlorophyll; 7440-44-0/Carbon
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Impact of grazing intensity on seasonal variations in soil organic carbon and soil CO2 efflux in two...
Next Document:  A demographic approach to study effects of climate change in desert plants.