A spatial energetics model of cadmium accumulation by diving ducks
Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous env...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Lovvorn, J. R. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1996 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag New York Inc. 1996 |
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| Übergeordnetes Werk: |
Enthalten in: Archives of environmental contamination and toxicology - Springer-Verlag, 1973, 30(1996), 2 vom: Feb., Seite 241-251 |
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| Übergeordnetes Werk: |
volume:30 ; year:1996 ; number:2 ; month:02 ; pages:241-251 |
| Links: |
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| DOI / URN: |
10.1007/BF00215804 |
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| Katalog-ID: |
OLC2070693600 |
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| 520 | |a Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. | ||
| 650 | 4 | |a Bioaccumulation Factor | |
| 650 | 4 | |a Cadmium Content | |
| 650 | 4 | |a Cadmium Uptake | |
| 650 | 4 | |a Cadmium Accumulation | |
| 650 | 4 | |a Profitability Effect | |
| 700 | 1 | |a Gillingham, M. P. |4 aut | |
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10.1007/BF00215804 doi (DE-627)OLC2070693600 (DE-He213)BF00215804-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Lovvorn, J. R. verfasserin aut A spatial energetics model of cadmium accumulation by diving ducks 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1996 Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. Bioaccumulation Factor Cadmium Content Cadmium Uptake Cadmium Accumulation Profitability Effect Gillingham, M. P. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 30(1996), 2 vom: Feb., Seite 241-251 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:30 year:1996 number:2 month:02 pages:241-251 https://doi.org/10.1007/BF00215804 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_23 GBV_ILN_31 GBV_ILN_69 GBV_ILN_70 GBV_ILN_130 GBV_ILN_154 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2006 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2360 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 AR 30 1996 2 02 241-251 |
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10.1007/BF00215804 doi (DE-627)OLC2070693600 (DE-He213)BF00215804-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Lovvorn, J. R. verfasserin aut A spatial energetics model of cadmium accumulation by diving ducks 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1996 Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. Bioaccumulation Factor Cadmium Content Cadmium Uptake Cadmium Accumulation Profitability Effect Gillingham, M. P. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 30(1996), 2 vom: Feb., Seite 241-251 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:30 year:1996 number:2 month:02 pages:241-251 https://doi.org/10.1007/BF00215804 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_23 GBV_ILN_31 GBV_ILN_69 GBV_ILN_70 GBV_ILN_130 GBV_ILN_154 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2006 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2360 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 AR 30 1996 2 02 241-251 |
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10.1007/BF00215804 doi (DE-627)OLC2070693600 (DE-He213)BF00215804-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Lovvorn, J. R. verfasserin aut A spatial energetics model of cadmium accumulation by diving ducks 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1996 Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. Bioaccumulation Factor Cadmium Content Cadmium Uptake Cadmium Accumulation Profitability Effect Gillingham, M. P. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 30(1996), 2 vom: Feb., Seite 241-251 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:30 year:1996 number:2 month:02 pages:241-251 https://doi.org/10.1007/BF00215804 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_23 GBV_ILN_31 GBV_ILN_69 GBV_ILN_70 GBV_ILN_130 GBV_ILN_154 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2006 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2360 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 AR 30 1996 2 02 241-251 |
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10.1007/BF00215804 doi (DE-627)OLC2070693600 (DE-He213)BF00215804-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Lovvorn, J. R. verfasserin aut A spatial energetics model of cadmium accumulation by diving ducks 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1996 Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. Bioaccumulation Factor Cadmium Content Cadmium Uptake Cadmium Accumulation Profitability Effect Gillingham, M. P. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 30(1996), 2 vom: Feb., Seite 241-251 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:30 year:1996 number:2 month:02 pages:241-251 https://doi.org/10.1007/BF00215804 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_23 GBV_ILN_31 GBV_ILN_69 GBV_ILN_70 GBV_ILN_130 GBV_ILN_154 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2006 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2360 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 AR 30 1996 2 02 241-251 |
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10.1007/BF00215804 doi (DE-627)OLC2070693600 (DE-He213)BF00215804-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Lovvorn, J. R. verfasserin aut A spatial energetics model of cadmium accumulation by diving ducks 1996 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1996 Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. Bioaccumulation Factor Cadmium Content Cadmium Uptake Cadmium Accumulation Profitability Effect Gillingham, M. P. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 30(1996), 2 vom: Feb., Seite 241-251 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:30 year:1996 number:2 month:02 pages:241-251 https://doi.org/10.1007/BF00215804 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_23 GBV_ILN_31 GBV_ILN_69 GBV_ILN_70 GBV_ILN_130 GBV_ILN_154 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2006 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2360 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4277 GBV_ILN_4307 GBV_ILN_4313 AR 30 1996 2 02 241-251 |
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Enthalten in Archives of environmental contamination and toxicology 30(1996), 2 vom: Feb., Seite 241-251 volume:30 year:1996 number:2 month:02 pages:241-251 |
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a spatial energetics model of cadmium accumulation by diving ducks |
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A spatial energetics model of cadmium accumulation by diving ducks |
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Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. © Springer-Verlag New York Inc. 1996 |
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Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. © Springer-Verlag New York Inc. 1996 |
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Abstract Food-chain transfer of contaminants is often predictable below the level of birds, but relations between contaminant concentrations in birds and their foods are often weak and variable. Much of this variation probably results from the energetics of foraging in fluctuating, heterogeneous environments, which has not been accounted for in past models of contaminant uptake by birds. Because birds are highly mobile with varying lengths of stay in different areas, collecting birds and analyzing their tissues yields unclear information on the importance of local contaminants. Likewise, toxicity assays with captive birds ignore changes in food intake with varying activity and weather experienced by wild birds. Neither of these approaches alone can predict maximum allowable contaminant levels in foods that avoid toxic effects under different field conditions, or what body burdens accumulate during varying lengths of stay that might affect the birds' biology at other places and times. To allow such predictions, an individual-based computer model was developed to simulate the intake of contaminated foods by diving ducks for varying conditions such as weather, water depth, food dispersion, and the size and digestibility of food. Food-intake estimates are combined with laboratory data on contaminant uptake as a function of food consumption and contaminant content. As an example, cadmium uptake is estimated for Canvasback ducks (Aythya valisineria) foraging on belowground winter buds of the submerged plant Vallisneria americana. Results indicate that relations between cadmium content of food and cadmium uptake by kidneys can be quite different depending on field conditions, and that cadmium content of food can be less important than food dispersion and resulting search costs in determining cadmium uptake. Models that estimate food intake based on energetic profitability can yield very different predictions than models that assume constant daily intake, or assume that food intake simply increases as energy costs of thermoregulation or other factors go up. Such profitability effects might explain much of the confounding variation in deriving bioaccumulation factors for birds. © Springer-Verlag New York Inc. 1996 |
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