Imperial College London

Dr Samraat Pawar

Faculty of Natural SciencesDepartment of Life Sciences (Silwood Park)

Reader in Theoretical Ecology
 
 
 
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Contact

 

+44 (0)20 7594 2213s.pawar CV

 
 
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Location

 

2.4KennedySilwood Park

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Summary

 

Publications

Citation

BibTex format

@article{Pawar:2012:10.1038/nature11131,
author = {Pawar, S and Dell, AI and Savage, VM},
doi = {10.1038/nature11131},
journal = {Nature},
pages = {485­--489},
title = {Dimensionality of consumer search space drives trophic interaction strengths},
url = {http://dx.doi.org/10.1038/nature11131},
volume = {486},
year = {2012}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Trophic interactions govern biomass fluxes in ecosystems, and stability in food webs. Knowledge of how trophic interaction strengths are affected by differences among habitats is crucial for understanding variation in ecological systems. Here we show how substantial variation in consumption-rate data, and hence trophic interaction strengths, arises because consumers tend to encounter resources more frequently in three dimensions (3D) (for example, arboreal and pelagic zones) than two dimensions (2D) (for example, terrestrial and benthic zones). By combining new theory with extensive data (376 species, with body masses ranging from 5.24 × 10(-14) kg to 800 kg), we find that consumption rates scale sublinearly with consumer body mass (exponent of approximately 0.85) for 2D interactions, but superlinearly (exponent of approximately 1.06) for 3D interactions. These results contradict the currently widespread assumption of a single exponent (of approximately 0.75) in consumer-resource and food-web research. Further analysis of 2,929 consumer-resource interactions shows that dimensionality of consumer search space is probably a major driver of species coexistence, and the stability and abundance of populations.
AU - Pawar,S
AU - Dell,AI
AU - Savage,VM
DO - 10.1038/nature11131
EP - 489
PY - 2012///
SN - 1476-4687
SP - 485
TI - Dimensionality of consumer search space drives trophic interaction strengths
T2 - Nature
UR - http://dx.doi.org/10.1038/nature11131
UR - http://www.ncbi.nlm.nih.gov/pubmed/22722834%20http://www.nature.com/nature/journal/v486/n7404/abs/nature11131.html
VL - 486
ER -