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Identifying nutrient sources to three lagoons at Ofu and Olosega, American Samoa using δ15N of benthic macroalgae

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dc.contributor.author Garrison, Virginia
dc.contributor.author Kroeger, Kevin D.
dc.contributor.author Fenner, Douglas
dc.contributor.author Craig, Peter
dc.date.accessioned 2008-02-04T19:59:52Z
dc.date.available 2008-02-04T19:59:52Z
dc.date.issued 2007-11-01
dc.identifier.citation Marine Pollution Bulletin 54 (2007): 1830-1838 en
dc.identifier.uri http://hdl.handle.net/1912/2054
dc.description This paper is not subject to U.S. copyright. The definitive version was published in Marine Pollution Bulletin 54 (2007): 1830-1838, doi:10.1016/j.marpolbul.2007.08.016. en
dc.description.abstract Degradation of nearshore habitats is a serious problem in some areas of American Samoa, such as in Pago Pago Harbor on Tutuila Island, and is a smaller but chronic problem in other areas. Sedimentation, pollution, nutrient enrichment from surface runoff or groundwater, and trampling are the major factors causing the changes. On the outer islands of Ofu and Olosega, there is an interesting contrast between relatively pristine lagoon habitats not far from comparatively degraded lagoon habitats. To’aga lagoon on the southeast side of Ofu Island has clear waters, a high diversity of corals and fishes, no human habitations, and an undeveloped watershed with no streams. To’aga lagoon is within the boundaries of the National Park of American Samoa and is the site of long-term research on coral reef resilience and global climate change. Only 3 km to the east of To’aga is a degraded lagoon that fronts Olosega Village. The Olosega lagoon is similar in size but has significantly less live coral than To’aga, and blooms of filamentous algae have been reported to cover the Olosega lagoon/reef flat bottom. The islands are influenced by the same regional-scale and biogeochemical regimes, and both islands are remnants of a volcanic caldera. en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Elsevier B.V. en
dc.relation.uri http://dx.doi.org/10.1016/j.marpolbul.2007.08.016
dc.title Identifying nutrient sources to three lagoons at Ofu and Olosega, American Samoa using δ15N of benthic macroalgae en
dc.type Article en
dc.identifier.doi 10.1016/j.marpolbul.2007.08.016


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