Document Detail


Community scale (15) N isoscapes: tracing the spatial impact of an exotic N(2) -fixing invader.
MedLine Citation:
PMID:  22409424     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Ecology Letters (2012) ABSTRACT: Plant-plant interactions are key processes shaping plant communities, but methods are lacking to accurately capture the spatial dimension of these processes. Isoscapes, i.e. spatially continuous observations of variations in stable isotope ratios, provide innovative methods to trace the spatial dimension of ecological processes at continental to global scales. Herein, we test the usefulness of nitrogen isoscapes (δ(15) N) for quantifying alterations in community functioning following exotic plant invasion. Nitrogen introduced by an exotic N(2) -fixing acacia could be accurately traced through the ecosystem and into the surrounding native vegetation by combining native species foliar δ(15) N with spatial information regarding plant location using geostatistical methods. The area impacted by N-addition was at least 3.5-fold greater than the physical area covered by the invader. Thus, downscaling isoscapes to the community level opens new frontiers in quantifying the spatial dimension of functional changes associated with invasion and in resolving the spatial component of within-community interactions.
Authors:
Katherine G Rascher; Christine Hellmann; Cristina Máguas; Christiane Werner
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Publication Detail:
Type:  LETTER     Date:  2012-3-12
Journal Detail:
Title:  Ecology letters     Volume:  -     ISSN:  1461-0248     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101121949     Medline TA:  Ecol Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 Blackwell Publishing Ltd/CNRS.
Affiliation:
Experimental and Systems Ecology, University of Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany Centre for Environmental Biology, Faculty of Sciences, University of Lisbon, Campo Grande, 1749-016, Lisbon, Portugal.
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