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Factors affecting estuarine populations of Nereocystis luetkeana in Kachemak Bay, Alaska

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dc.contributor.author Chenelot, Héloïse Anne Claude
dc.date.accessioned 2015-03-17T22:27:17Z
dc.date.available 2015-03-17T22:27:17Z
dc.date.issued 2003-12
dc.identifier.uri http://hdl.handle.net/11122/5133
dc.description Thesis (M.S.) University of Alaska Fairbanks, 2003 en_US
dc.description.abstract Nereocystis luetkeana forms extensive kelp beds in Kachemak Bay, Alaska. Salinity and turbidity gradients apparently regulate kelp bed distribution throughout this estuary. The beds are large at the entrance of the bay, only solitary stands occur in the inner bay, and no kelp is found at the head of the bay. The role of salinity and turbidity on Nereocystis sporophyte growth was investigated by performing reciprocal transplants among three beds along the bay axis and regularly measuring stipe growth. The effects of salinity and light on spores were studied in the laboratory by recording sinking tendency, settlement success, germination success, and germ tube length under different salinity and light levels. Grazing effects of Lacuna vincta impacted the survival of Nereocystis transplants in-situ and on plants of different age classes in the laboratory. Overall, this study suggests a possible negative estuarine effect on sporophytes transplanted from the outer to the inner bay and on certain aspects of spore development. Herbivory pressure had significant localized effects on Nereocystis survival and was most pronounced on juvenile plants. The dynamics of Nereocystis kelp beds in Kachemak Bay results from large-scale environmental factors and local-scale biological processes. en_US
dc.language.iso en_US en_US
dc.title Factors affecting estuarine populations of Nereocystis luetkeana in Kachemak Bay, Alaska en_US
dc.type Thesis en_US
dc.type.degree ms en_US
dc.identifier.department Graduate Program in Marine Science and Limnology en_US


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