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An isotopic analysis of ecosystem co...

Hanson, Natalie.

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An isotopic analysis of ecosystem connectivity: Are anadromous Alosa herring marine nutrient vectors?

Record Type:	Language materials, printed : Monograph/item
Title/Author:	An isotopic analysis of ecosystem connectivity: Are anadromous Alosa herring marine nutrient vectors?/
Author:	Hanson, Natalie.
Description:	51 p.
Notes:	Adviser: Stephen MacAvoy.
Contained By:	Masters Abstracts International47-01.
Subject:	Agriculture, Fisheries and Aquaculture. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1458246
ISBN:	9780549752448

An isotopic analysis of ecosystem connectivity: Are anadromous Alosa herring marine nutrient vectors?
Hanson, Natalie.

An isotopic analysis of ecosystem connectivity: Are anadromous Alosa herring marine nutrient vectors? - 51 p.

Adviser: Stephen MacAvoy.

Thesis (M.S.)--The American University, 2008.

This thesis examines the role of herring of the genus Alosa as vectors of marine-derived nutrients to freshwater invertebrates. Alosa feed in the Atlantic Ocean and migrate to coastal streams of the eastern US to spawn each spring. In order to investigate whether the temporary presence of these fish is a nutrient source for the stream ecosystem, stable isotope analysis was employed. Since oceanic organisms will be relatively enriched in nitrogen-15 and carbon-13 in comparison to the stream components, those isotopes can be used as a chemical tracer. Significant enrichment in 15N and 13C was found in stream invertebrates in correlation with the Alosa spawning migration. Application of a mixing model to the data yielded the estimate that approximately 20% of the diet of the invertebrate Gammarus fasciatus in late April had come from Alosa-derived nutrients.

ISBN: 9780549752448Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

An isotopic analysis of ecosystem connectivity: Are anadromous Alosa herring marine nutrient vectors?
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020 $a 9780549752448
035 $a (UMI)AAI1458246
035 $a AAI1458246
040 $a UMI $c UMI
100 1 $a Hanson, Natalie. $3 1277405
245 1 3 $a An isotopic analysis of ecosystem connectivity: Are anadromous Alosa herring marine nutrient vectors?
300 $a 51 p.
500 $a Adviser: Stephen MacAvoy.
500 $a Source: Masters Abstracts International, Volume: 47-01, page: .
502 $a Thesis (M.S.)--The American University, 2008.
520 $a This thesis examines the role of herring of the genus Alosa as vectors of marine-derived nutrients to freshwater invertebrates. Alosa feed in the Atlantic Ocean and migrate to coastal streams of the eastern US to spawn each spring. In order to investigate whether the temporary presence of these fish is a nutrient source for the stream ecosystem, stable isotope analysis was employed. Since oceanic organisms will be relatively enriched in nitrogen-15 and carbon-13 in comparison to the stream components, those isotopes can be used as a chemical tracer. Significant enrichment in 15N and 13C was found in stream invertebrates in correlation with the Alosa spawning migration. Application of a mixing model to the data yielded the estimate that approximately 20% of the diet of the invertebrate Gammarus fasciatus in late April had come from Alosa-derived nutrients.
590 $a School code: 0008.
650 4 $a Agriculture, Fisheries and Aquaculture. $3 1020913
650 4 $a Biology, Ecology. $3 1017726
690 $a 0329
690 $a 0792
710 2 $a The American University. $3 1017567
773 0 $t Masters Abstracts International $g 47-01.
790 $a 0008
790 1 0 $a MacAvoy, Stephen, $e advisor
791 $a M.S.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1458246