Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations
Abstract The immediate and delayed effects of embryonic exposure to low levels of polynuclear aromatic hydrocarbons (PAHs) have been shown to reduce survival to maturity by 50% in exposed pink salmon populations. This suggests that chronically exposed populations could be extirpated over relatively...
Published in: | Integrated Environmental Assessment and Management |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2007
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/ieam.5630030306 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fieam.5630030306 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/ieam.5630030306 |
id |
crwiley:10.1002/ieam.5630030306 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/ieam.5630030306 2024-06-23T07:56:13+00:00 Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations Heintz, Ron A 2007 http://dx.doi.org/10.1002/ieam.5630030306 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fieam.5630030306 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/ieam.5630030306 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Integrated Environmental Assessment and Management volume 3, issue 3, page 351-363 ISSN 1551-3777 1551-3793 journal-article 2007 crwiley https://doi.org/10.1002/ieam.5630030306 2024-06-11T04:46:09Z Abstract The immediate and delayed effects of embryonic exposure to low levels of polynuclear aromatic hydrocarbons (PAHs) have been shown to reduce survival to maturity by 50% in exposed pink salmon populations. This suggests that chronically exposed populations could be extirpated over relatively few generations, but the effect of density dependence on extirpation rate is unknown. This study examines the interaction of PAH effects and randomly varying density dependence on a simulated population. The simulation derives from 70 years of observations made on a single pink salmon population and toxicity studies involving a hatchery population in the same watershed. Results from simulations involving exposure of 100% of the population to effects consistent with an aqueous PAH concentration of 18 nL/L indicate an 80% decrease in population productivity and an 11% probability of extinction after 35 generations. In contrast, population growth rate declined by only 5%. Further decreases in survival relative to that of observed PAH effects rapidly increase the probability of extinction. Data from these simulations demonstrate that, at low levels of exposure, density dependence can compensate for reduced population size and buffer the population against extinction. However, if equilibrium size is depressed sufficiently, random environmental variation overcomes the buffering effect of density dependence and extinction probability increases. These data demonstrate that extinction probability and population size are more sensitive measures of population effects than growth rate for wild populations regulated by density dependence. Article in Journal/Newspaper Pink salmon Wiley Online Library Integrated Environmental Assessment and Management 3 3 351 363 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The immediate and delayed effects of embryonic exposure to low levels of polynuclear aromatic hydrocarbons (PAHs) have been shown to reduce survival to maturity by 50% in exposed pink salmon populations. This suggests that chronically exposed populations could be extirpated over relatively few generations, but the effect of density dependence on extirpation rate is unknown. This study examines the interaction of PAH effects and randomly varying density dependence on a simulated population. The simulation derives from 70 years of observations made on a single pink salmon population and toxicity studies involving a hatchery population in the same watershed. Results from simulations involving exposure of 100% of the population to effects consistent with an aqueous PAH concentration of 18 nL/L indicate an 80% decrease in population productivity and an 11% probability of extinction after 35 generations. In contrast, population growth rate declined by only 5%. Further decreases in survival relative to that of observed PAH effects rapidly increase the probability of extinction. Data from these simulations demonstrate that, at low levels of exposure, density dependence can compensate for reduced population size and buffer the population against extinction. However, if equilibrium size is depressed sufficiently, random environmental variation overcomes the buffering effect of density dependence and extinction probability increases. These data demonstrate that extinction probability and population size are more sensitive measures of population effects than growth rate for wild populations regulated by density dependence. |
format |
Article in Journal/Newspaper |
author |
Heintz, Ron A |
spellingShingle |
Heintz, Ron A Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations |
author_facet |
Heintz, Ron A |
author_sort |
Heintz, Ron A |
title |
Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations |
title_short |
Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations |
title_full |
Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations |
title_fullStr |
Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations |
title_full_unstemmed |
Chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations |
title_sort |
chronic exposure to polynuclear aromatic hydrocarbons in natal habitats leads to decreased equilibrium size, growth, and stability of pink salmon populations |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/ieam.5630030306 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fieam.5630030306 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/ieam.5630030306 |
genre |
Pink salmon |
genre_facet |
Pink salmon |
op_source |
Integrated Environmental Assessment and Management volume 3, issue 3, page 351-363 ISSN 1551-3777 1551-3793 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ieam.5630030306 |
container_title |
Integrated Environmental Assessment and Management |
container_volume |
3 |
container_issue |
3 |
container_start_page |
351 |
op_container_end_page |
363 |
_version_ |
1802649179811479552 |