Testing the role of contaminants in depressing avian numbers

Environmental contaminants are ubiquitous and so are often key suspects in cases of lagging wildlife populations. How do we test hypotheses about cause-effect linkages between contaminants and wildlife health? We present three case studies in which different approaches were used to test hypotheses a...

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Autores principales:	KARASOV,WILLIAM H., MEYER,MICHAEL W.
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2000
Materias:	Applied physiological ecology ecotoxicology birds chemical contaminants
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300009
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spelling	oai:scielo:S0716-078X20000003000092000-11-09Testing the role of contaminants in depressing avian numbersKARASOV,WILLIAM H.MEYER,MICHAEL W. Applied physiological ecology ecotoxicology birds chemical contaminants Environmental contaminants are ubiquitous and so are often key suspects in cases of lagging wildlife populations. How do we test hypotheses about cause-effect linkages between contaminants and wildlife health? We present three case studies in which different approaches were used to test hypotheses about effects of contaminants on wildlife. The cases involve the possible impacts of (1) polychlorinated biphenyl on Lake Superior bald eagles (Haliaeetus leucocephalus); (2) dioxin on osprey (Pandion halieatus); and (3) methyl mercury on common loons (Gavia immer). The different approaches were dictated by legal, logistic, and financial limitations, but the relative strengths of experimental and mechanistic approaches over correlative approaches is underscored. For all three species, the simple correlation between a single contaminant and performance was confounded by covariation with other types of contaminants and/or natural ecological factors such as food availability and predationinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.73 n.3 20002000-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300009en10.4067/S0716-078X2000000300009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Applied physiological ecology ecotoxicology birds chemical contaminants
spellingShingle	Applied physiological ecology ecotoxicology birds chemical contaminants KARASOV,WILLIAM H. MEYER,MICHAEL W. Testing the role of contaminants in depressing avian numbers
description	Environmental contaminants are ubiquitous and so are often key suspects in cases of lagging wildlife populations. How do we test hypotheses about cause-effect linkages between contaminants and wildlife health? We present three case studies in which different approaches were used to test hypotheses about effects of contaminants on wildlife. The cases involve the possible impacts of (1) polychlorinated biphenyl on Lake Superior bald eagles (Haliaeetus leucocephalus); (2) dioxin on osprey (Pandion halieatus); and (3) methyl mercury on common loons (Gavia immer). The different approaches were dictated by legal, logistic, and financial limitations, but the relative strengths of experimental and mechanistic approaches over correlative approaches is underscored. For all three species, the simple correlation between a single contaminant and performance was confounded by covariation with other types of contaminants and/or natural ecological factors such as food availability and predation
author	KARASOV,WILLIAM H. MEYER,MICHAEL W.
author_facet	KARASOV,WILLIAM H. MEYER,MICHAEL W.
author_sort	KARASOV,WILLIAM H.
title	Testing the role of contaminants in depressing avian numbers
title_short	Testing the role of contaminants in depressing avian numbers
title_full	Testing the role of contaminants in depressing avian numbers
title_fullStr	Testing the role of contaminants in depressing avian numbers
title_full_unstemmed	Testing the role of contaminants in depressing avian numbers
title_sort	testing the role of contaminants in depressing avian numbers
publisher	Sociedad de Biología de Chile
publishDate	2000
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300009
work_keys_str_mv	AT karasovwilliamh testingtheroleofcontaminantsindepressingaviannumbers AT meyermichaelw testingtheroleofcontaminantsindepressingaviannumbers
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Testing the role of contaminants in depressing avian numbers

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