Effects of spatial subsidies and canopy cover on pond communities and multiple life stages in amphibians

MOspace/Manakin Repository

Breadcrumbs Navigation

Effects of spatial subsidies and canopy cover on pond communities and multiple life stages in amphibians

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/15872

[-] show simple item record

dc.contributor.advisor Semlitsch, Raymond D. en_US
dc.contributor.author Earl, Julia E.
dc.contributor.other University of Missouri-Columbia. Graduate School. Theses and Dissertations. Dissertations. 2012 Dissertations en_US
dc.date.accessioned 2012-10-26T16:08:10Z
dc.date.available 2012-10-26T16:08:10Z
dc.date.issued 2012
dc.date.submitted 2012 Summer en_US
dc.identifier.other EarlJ-071211-D16
dc.identifier.uri http://hdl.handle.net/10355/15872
dc.description Title from PDF of title page (University of Missouri--Columbia, viewed on October 26, 2012). en_US
dc.description The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. en_US
dc.description Dissertation advisor: Dr. Raymond D. Semlitsch en_US
dc.description Includes bibliographical references. en_US
dc.description Vita. en_US
dc.description Ph. D. University of Missouri-Columbia 2012. en_US
dc.description Dissertations, Academic -- University of Missouri--Columbia -- Biological sciences. en_US
dc.description "July 2012" en_US
dc.description.abstract Spatial subsidies are resources that move from one ecosystem to another. In aquatic systems, canopy cover determines both light availability and subsidy input in the form of senescing leaves. This phenomenon has been well studied in streams, and general patterns of ecosystem production, community structure, and the reciprocal export of animals have been discovered. I was interested in whether these patterns also occurred in ponds. I examined these patterns using experimental pond mesocosms and supported the results using an observational study of natural ponds. For the pond mesocosm experiment, I placed mesocosms along a canopy cover gradient and manipulated spatial subsidy input. I found a shift from net heterotrophy in closed canopy mesocosms to a balance between heterotrophy and autotrophy in open canopy mesocosms. The macroinvertebrate community structure responded to both canopy cover and subsidy input in mesocosms. The biomass of collectors (detritivores) was highest in mesocosms with litter input and increased with canopy cover, a pattern also present in natural ponds. Finally, I found that litter input increased the reciprocal export of amphibian biomass compared to no input. Amphibian biomass also decreased with increases in primary productivity. This research highlights the importance of spatial subsidies that connect different ecosystem types. Conserving these ecosystem connections will help maintain biodiversity and ecosystem function. en_US
dc.format.extent xiii, 185 pages en_US
dc.language.iso en_US en_US
dc.publisher University of Missouri--Columbia en_US
dc.relation.ispartof 2012 Freely available dissertations (MU) en_US
dc.subject macroinvertebrate en_US
dc.subject ecosystem en_US
dc.subject canopy cover en_US
dc.title Effects of spatial subsidies and canopy cover on pond communities and multiple life stages in amphibians en_US
dc.type Thesis en_US
thesis.degree.discipline Biological sciences en_US
thesis.degree.grantor University of Missouri--Columbia en_US
thesis.degree.name Ph. D. en_US
thesis.degree.level Doctoral en_US


This item appears in the following Collection(s)

[-] show simple item record