Feeding preferences of Gammarus pseudolimnaeus when presented with fresh and senescent leaves of associated riparian vegetation.

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dc.contributor.author Allan, Brian en_US
dc.coverage.spatial Carp Creek en_US
dc.date.accessioned 2007-06-14T22:52:08Z
dc.date.available 2007-06-14T22:52:08Z
dc.date.issued 1998 en_US
dc.identifier.uri http://hdl.handle.net/2027.42/54756
dc.description.abstract The purpose of this study was to investigate if the amphipod, Gammarus pseudolimnaeus, feeds preferentially upon fresh vs. senescent leaves of four species of plant occurring in its habitat. The four species of plant used in this experiment were: Alnus rugosa, Caltha palustris, Lemna minor, and a bryophyte, Fontinalis hypnoides. The specimens used in this experiment were obtained from Carp Creek, in Cheboygan Co., Michigan. Sixty petri dishes were used, fifteen for each species of plant, each dish containing one samaple of senescent leaf tissue, and one sample of fresh leaf tissue. To each dish three G. pseudolimnaeus were added, totaling 25 mm of amphipod per dish. The amphipods were allowed to feed at room temperature for 36 hours, after the initial experiment performed in a refrigerator failed after 24 hours. With all four species, G. pseudolimnaeus demonstrated a statistically significant preference for senescent leaves over fresh leaves. For the three vascular plants, there is little doubt that the G. pseudolimnaeus consistently prefers the senescent leaves, and that this is the result of the presence of secondary metabolites. For the bryophyte, it is clear that the senescent leaves were preferred to some degree, but the cause of this preference is less evident. It is not yet well-documented if bryophytes produce their own secondary metabolites, or if they obtain them from microbial associations or mineral uptake. There is also evidence to indicate that there may be sufficient benefits for herbivores living in cold water to consume fresh bryophyte leaves in spite of risk associated with consuming toxins. en_US
dc.format.extent 379411 bytes
dc.format.extent 3144 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.subject General Ecology en_US
dc.subject.other VASCULAR en_US
dc.subject.other PLANTS en_US
dc.subject.other BRYOPHYTES en_US
dc.subject.other GAMMARUS en_US
dc.subject.other INSECTS en_US
dc.subject.other AQUATIC en_US
dc.subject.other INVERTEBRATES en_US
dc.subject.other HERBIVORY en_US
dc.subject.other SENESCENCE en_US
dc.subject.other AMPHIPODS en_US
dc.subject.other LEAF en_US
dc.subject.other LITTER en_US
dc.subject.other SHREDDER en_US
dc.subject.other DETRITUS en_US
dc.subject.other SECONDARY en_US
dc.subject.other COMPOUNDS en_US
dc.title Feeding preferences of Gammarus pseudolimnaeus when presented with fresh and senescent leaves of associated riparian vegetation. en_US
dc.type Working Paper en_US
dc.subject.hlbsecondlevel Natural Resource and Environment en_US
dc.subject.hlbtoplevel Science en_US
dc.contributor.affiliationum Biological Station, University of Michigan en_US
dc.contributor.affiliationumcampus Ann Arbor en_US
dc.description.bitstreamurl http://deepblue.lib.umich.edu/bitstream/2027.42/54756/1/3197.pdf en_US
dc.description.filedescription Description of 3197.pdf : Access restricted to on-site users at the U-M Biological Station. en_US
dc.owningcollname Biological Station, University of Michigan (UMBS)
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