Evidence for competition between carnivorous plants and spiders

Several studies have demonstrated that competition between disparate taxa can be important in determining community structure, yet surprisingly, to our knowledge, no quantitative studies have been conducted on competition between carnivorous plants and animals. To examine potential competition betwe...

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Published in:Proceedings of the Royal Society. B, Biological sciences Biological sciences, 2010-10, Vol.277 (1696), p.3001-3008
Main Authors: Jennings, David E., Krupa, James J., Raffel, Thomas R., Rohr, Jason R.
Format: Article
Language:English
Subjects:
Animal traps
Animals
Araneae
Arthropoda
Arthropods
Biomass
Carnivorous plants
Competition
Competitive Behavior
Drosera - anatomy & histology
Drosera - physiology
Drosera capillaris
Ecological competition
Ecosystem
Feeding Behavior
Interspecific competition
Lycosidae
Plants
Plant–animal Interactions
Spiders
Spiders - physiology
Taxa
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container_issue 1696
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container_title Proceedings of the Royal Society. B, Biological sciences
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creator Jennings, David E.
Krupa, James J.
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description Several studies have demonstrated that competition between disparate taxa can be important in determining community structure, yet surprisingly, to our knowledge, no quantitative studies have been conducted on competition between carnivorous plants and animals. To examine potential competition between these taxa, we studied dietary and microhabitat overlap between pink sundews (Drosera capillaris) and wolf spiders (Lycosidae) in the field, and conducted a laboratory experiment examining the effects of wolf spiders on sundew fitness. In the field, we found that sundews and spiders had a high dietary overlap with each other and with the available arthropod prey. Associations between sundews and spiders depended on spatial scale: both sundews and spiders were found more frequently in quadrats with more abundant prey, but within quadrats, spiders constructed larger webs and located them further away from sundews as the total sundew trapping area increased, presumably to reduce competition. Spiders also constructed larger webs when fewer prey were available. In the laboratory, our experiment revealed that spiders can significantly reduce sundew fitness. Our findings suggest that members of the plant and animal kingdoms can and do compete.
doi_str_mv 10.1098/rspb.2010.0465
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subjects Animal traps
Animals
Araneae
Arthropoda
Arthropods
Biomass
Carnivorous plants
Competition
Competitive Behavior
Drosera - anatomy & histology
Drosera - physiology
Drosera capillaris
Ecological competition
Ecosystem
Feeding Behavior
Interspecific competition
Lycosidae
Plants
Plant–animal Interactions
Spiders
Spiders - physiology
Taxa
title Evidence for competition between carnivorous plants and spiders
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