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Food web structure, mercury biomagni...

Embury, John David.

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Food web structure, mercury biomagnification and carbon pathways in an experimentally flooded wetland.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Food web structure, mercury biomagnification and carbon pathways in an experimentally flooded wetland./
作者:	Embury, John David.
面頁冊數:	87 p.
附註:	Adviser: Robert Hecky.
Contained By:	Masters Abstracts International39-03.
標題:	Agriculture, Fisheries and Aquaculture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ56123
ISBN:	0612561232

Food web structure, mercury biomagnification and carbon pathways in an experimentally flooded wetland.
Embury, John David.

Food web structure, mercury biomagnification and carbon pathways in an experimentally flooded wetland. - 87 p.

Adviser: Robert Hecky.

Thesis (M.Sc.)--The University of Manitoba (Canada), 2000.

The objective of this thesis was to determine the role of food web structures and carbon sources in contributing to elevated organic mercury (OHg) in a flooded reservoir food web compared to a non flooded lake. Stable isotopes of carbon indicated the different sources of food energy that could potentially transfer OHg through the food web to top predators. Stable isotopes of nitrogen related trophic position of organisms to contaminant loading and allowed quantification of biomagnification. The components of the pelagic food webs in the Experimental Lake had higher concentrations of OHg relative to other food webs based on littoral benthic algal production of the Experimental Lake and food webs in the Control Lake. Consequently, the higher OHg concentrations in the pelagic food web were caused by higher OHg concentrations at the base of the pelagic food web. Consequently, this study found that impoundment affects mercury burdens in pelagic food webs more so than littoral/benthic food webs. (Abstract shortened by UMI.)

ISBN: 0612561232Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

Food web structure, mercury biomagnification and carbon pathways in an experimentally flooded wetland.
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