Dissertation/Thesis Abstract

The effects of ultraviolet radiation on the growth, reproduction and survival of the lobate ctenophore Mnemiopsis leidyi
by Rathjen, Kristen Alyssa, M.S., University of Maryland, College Park, 2010, 76; 1478131
Abstract (Summary)

Solar ultraviolet radiation (UVR) is an environmental stressor that can have a variety of negative effects on aquatic organisms. The ctenophore Mnemiopsis leidyi is a highly transparent organism that has not been shown to actively avoid UVR or possess photoprotective compounds and may therefore be vulnerable to deleterious effects of UVR. Results of this study indicate that summertime UVR exposure equivalent to average UVR conditions within the top 0.5 m of the water column of the Rhode River, Maryland, USA, can cause mortality and reduced size of M. leidyi. Exposures tested did not, however, affect egg production. Experiments indicated a sharp threshold for the tolerance of M. leidyi to biologically effective UVR exposure. Mnemiopsis leidyi is an important component in many ecosystems; thus, changes in its abundance have the potential to significantly affect coastal and estuarine food webs and oyster, fish and sea nettle populations in systems like Chesapeake Bay.

Indexing (document details)
Advisor: Breitburg, Denise L., Roman, Michael R.
Commitee: Neale, Patrick J., Rowe, Christopher L.
School: University of Maryland, College Park
Department: Marine-Estuarine-Environmental Sciences
School Location: United States -- Maryland
Source: MAI 48/06M, Masters Abstracts International
Subjects: Water Resource Management, Environmental science, Biophysics
Keywords: Biological weighting function, Chesapeake Bay, Ctenophore, Maryland, Ultraviolet radiation
Publication Number: 1478131
ISBN: 978-1-124-07654-6
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