Is the per capita rate of increase a good measure of population-level effects in ecotoxicology?
In this paper we consider the relationships between effects of toxicants on population growth rate (r) and the individual‐level traits (survival and reproduction) contributing to it by examining population dynamics theory and by reviewing the experimental work that has been carried out in this conte...
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| Veröffentlicht in: | Environmental toxicology and chemistry 1999-07, Vol.18 (7), p.1544-1556 |
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| container_title | Environmental toxicology and chemistry |
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| creator | Forbes, Valery E. Calow, Peter |
| description | In this paper we consider the relationships between effects of toxicants on population growth rate (r) and the individual‐level traits (survival and reproduction) contributing to it by examining population dynamics theory and by reviewing the experimental work that has been carried out in this context. There was no consistent pattern in terms of which individual‐level traits were most or least sensitive to toxicant exposure, and it is therefore impractical to select traits for ecotoxicological testing on this basis. Although percent changes in several of the individual‐level traits showed significant overall correlations with percent changes in r, changes in any single trait could explain no more than about one‐half of the percent change in r. Our conclusion is that r is a better measure of responses to toxicants than are individual‐level effects, because it integrates potentially complex interactions among life‐history traits and provides a more relevant measure of ecological impact. |
| doi_str_mv | 10.1002/etc.5620180729 |
| format | Article |
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There was no consistent pattern in terms of which individual‐level traits were most or least sensitive to toxicant exposure, and it is therefore impractical to select traits for ecotoxicological testing on this basis. Although percent changes in several of the individual‐level traits showed significant overall correlations with percent changes in r, changes in any single trait could explain no more than about one‐half of the percent change in r. 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There was no consistent pattern in terms of which individual‐level traits were most or least sensitive to toxicant exposure, and it is therefore impractical to select traits for ecotoxicological testing on this basis. Although percent changes in several of the individual‐level traits showed significant overall correlations with percent changes in r, changes in any single trait could explain no more than about one‐half of the percent change in r. Our conclusion is that r is a better measure of responses to toxicants than are individual‐level effects, because it integrates potentially complex interactions among life‐history traits and provides a more relevant measure of ecological impact.</description><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Biological and medical sciences</subject><subject>Ecological risk assessment</subject><subject>Ecotoxicology, biological effects of pollution</subject><subject>Fundamental and applied biological sciences. 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| ispartof | Environmental toxicology and chemistry, 1999-07, Vol.18 (7), p.1544-1556 |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Animal, plant and microbial ecology Applied ecology Biological and medical sciences Ecological risk assessment Ecotoxicology, biological effects of pollution Fundamental and applied biological sciences. Psychology General aspects Life history Population dynamics |
| title | Is the per capita rate of increase a good measure of population-level effects in ecotoxicology? |
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