| The effects of resource enrichment, dispersal, and predation on local and metacommunity structure. | |
| | |
MedLine Citation:
|
PMID: 16639564 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Community structure is the observable outcome of numerous processes. We conducted a laboratory experiment using a microbial model system to disentangle effects of nutrient enrichment, dispersal, and predation on prey species richness and predator abundance at local and metacommunity scales. Prey species included: Chilomonas sp., Colpidium striatum, Colpoda cucullus, Paramecium tetraurelia, P. caudatum, Philodina sp., Spirostomum sp., Tetrahymena thermophila, and Uronema sp., and Stentor coeruleus was the predator used. We hypothesized that: (1) increased basal resources should maintain greater species richness and higher predator abundance; (2) dispersal should maintain greater species richness; and (3) predation should reduce species richness, especially in the high resource treatments relative to no-predator treatments. Our results support all three hypotheses. Further, we show that dispersal affects richness at the local community scale but not at the metacommunity scale. However, predation seems to have major effects at both the local and metacommunity scale. Overall, our results show that effects of resource enrichment, dispersal, and predation were mostly additive rather than interactive, indicating that it may be sometimes easier to understand their effects than generally thought due to complex interactive effects. |
| | |
Authors:
|
Marc W Cadotte; Allison M Fortner; Tadashi Fukami |
Related Documents
:
|
11345334 - Transient dynamics and food-web complexity in the lotka-volterra cascade model. 17427134 - Importance of interactions between food quality, quantity, and gut transit time on cons... 18559174 - Influence of a large late summer precipitation event on food limitation and grasshopper... 16963354 - Internet food marketing strategies aimed at children and adolescents: a content analysi... 17920144 - Affective modulation of eyeblink reactions to noxious sural nerve stimulation: a supras... 19120914 - Bacteriophages and their application in food safety. |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2006-04-26 |
Journal Detail:
|
Title: Oecologia Volume: 149 ISSN: 0029-8549 ISO Abbreviation: Oecologia Publication Date: 2006 Aug |
Date Detail:
|
Created Date: 2006-09-11 Completed Date: 2006-11-20 Revised Date: 2009-11-19 |
Medline Journal Info:
|
Nlm Unique ID: 0150372 Medline TA: Oecologia Country: Germany |
Other Details:
|
Languages: eng Pagination: 150-7 Citation Subset: IM |
Affiliation:
|
Complex Systems Group, Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996, USA. mcadotte@utk.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Analysis of Variance Animals Bacterial Physiological Phenomena Ecosystem* Eukaryota / physiology Food Chain* Models, Theoretical* Population Dynamics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Endovascular management of dural carotid-cavernous sinus fistulas in 141 patients.
Next Document: Stoichiometry and large-scale patterns of leaf carbon and nitrogen in the grassland biomes of China.