Advanced

The global relationship between climate, net primary production and the diet of spiders

Birkhofer, Klaus LU and Wolters, Volkmar (2012) In Global Ecology and Biogeography 21(2). p.100-108
Abstract
Aim We compiled data on prey utilization of spiders at a global scale to better understand the relationship between current climate or net primary production (NPP) and diet breadth, evenness and composition in spiders. We test whether the productivity and the diversity–climatic-stability (DCS) hypotheses focusing on diversity patterns may also explain global patterns in prey utilization by web-building and cursorial spiders.



Location A global dataset of 95 data points from semi-natural and natural terrestrial habitats spanning 41.3° S to 56.1° N.



Methods We collected data on spider prey (29 groups, mostly order-level invertebrate taxa) through extensive literature research to identify the relationship... (More)
Aim We compiled data on prey utilization of spiders at a global scale to better understand the relationship between current climate or net primary production (NPP) and diet breadth, evenness and composition in spiders. We test whether the productivity and the diversity–climatic-stability (DCS) hypotheses focusing on diversity patterns may also explain global patterns in prey utilization by web-building and cursorial spiders.



Location A global dataset of 95 data points from semi-natural and natural terrestrial habitats spanning 41.3° S to 56.1° N.



Methods We collected data on spider prey (29 groups, mostly order-level invertebrate taxa) through extensive literature research to identify the relationship between climatic conditions and NPP and spider diets based on 66 studies of prey composition in 82 spider species.



Results The number of prey groups in spider diets was positively related to NPP, after accounting for differences in sampling effort in the original studies. In general, diet breadth was significantly higher for spider species in tropical environments. Prey individuals in spider diets were more evenly distributed among different prey groups in warmer environments with lower fluctuations in precipitation. Collembola and other spiders were more common prey for spiders with a cursorial hunting mode. Myriapoda and Collembola were more common prey in cooler climates with more stable precipitation, whereas Isoptera, Lepidoptera, Psocoptera and Coleoptera showed the opposite pattern.



Main conclusions The positive relationship between diet breadth and NPP and the negative relationship between prey evenness and seasonality in precipitation support the productivity and the DCS hypotheses, respectively. This effect on global patterns of invertebrate predator–prey interactions suggests that trophic interactions between spiders and their prey are sensitive to climatic conditions. Climatic conditions may not only affect spider community composition, but also considerably alter the functional role of these abundant invertebrate predators in terrestrial ecosystems. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Araneae, diet breadth, diet composition, generalist predators, more-individuals hypothesis, predator–prey interactions, prey specialization, species–energy theory
in
Global Ecology and Biogeography
volume
21
issue
2
pages
100 - 108
publisher
Wiley-Blackwell
external identifiers
  • wos:000298912900001
  • scopus:84855555854
ISSN
1466-8238
DOI
10.1111/j.1466-8238.2011.00654.x
project
BECC
language
English
LU publication?
no
id
1d6a595a-7481-448b-8867-4ed81b335c35 (old id 2440373)
alternative location
http://www.scopus.com/inward/record.url?eid=2-s2.0-84855555854&partnerID=40&md5=f28387a40a60cc3d0e9b0eb0e263cdef
date added to LUP
2012-06-18 14:41:46
date last changed
2017-11-12 03:00:45
@article{1d6a595a-7481-448b-8867-4ed81b335c35,
  abstract     = {Aim We compiled data on prey utilization of spiders at a global scale to better understand the relationship between current climate or net primary production (NPP) and diet breadth, evenness and composition in spiders. We test whether the productivity and the diversity–climatic-stability (DCS) hypotheses focusing on diversity patterns may also explain global patterns in prey utilization by web-building and cursorial spiders.<br/><br>
<br/><br>
Location A global dataset of 95 data points from semi-natural and natural terrestrial habitats spanning 41.3° S to 56.1° N.<br/><br>
<br/><br>
Methods We collected data on spider prey (29 groups, mostly order-level invertebrate taxa) through extensive literature research to identify the relationship between climatic conditions and NPP and spider diets based on 66 studies of prey composition in 82 spider species.<br/><br>
<br/><br>
Results The number of prey groups in spider diets was positively related to NPP, after accounting for differences in sampling effort in the original studies. In general, diet breadth was significantly higher for spider species in tropical environments. Prey individuals in spider diets were more evenly distributed among different prey groups in warmer environments with lower fluctuations in precipitation. Collembola and other spiders were more common prey for spiders with a cursorial hunting mode. Myriapoda and Collembola were more common prey in cooler climates with more stable precipitation, whereas Isoptera, Lepidoptera, Psocoptera and Coleoptera showed the opposite pattern.<br/><br>
<br/><br>
Main conclusions The positive relationship between diet breadth and NPP and the negative relationship between prey evenness and seasonality in precipitation support the productivity and the DCS hypotheses, respectively. This effect on global patterns of invertebrate predator–prey interactions suggests that trophic interactions between spiders and their prey are sensitive to climatic conditions. Climatic conditions may not only affect spider community composition, but also considerably alter the functional role of these abundant invertebrate predators in terrestrial ecosystems.},
  author       = {Birkhofer, Klaus and Wolters, Volkmar},
  issn         = {1466-8238},
  keyword      = {Araneae,diet breadth,diet composition,generalist predators,more-individuals hypothesis,predator–prey interactions,prey specialization,species–energy theory},
  language     = {eng},
  number       = {2},
  pages        = {100--108},
  publisher    = {Wiley-Blackwell},
  series       = {Global Ecology and Biogeography},
  title        = {The global relationship between climate, net primary production and the diet of spiders},
  url          = {http://dx.doi.org/10.1111/j.1466-8238.2011.00654.x},
  volume       = {21},
  year         = {2012},
}