Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon
International audience Spatial aggregation within a population is a widespread phenomenon which may both exacerbate local competition and the stochastic effect of local environmental perturbations. In particular, the spatial aggregation of nests may strongly affect recruitment and hence population d...
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Online Access: | https://hal.science/hal-01773150 https://hal.science/hal-01773150/document https://hal.science/hal-01773150/file/2018_Bouchard_Ecosphere.pdf https://doi.org/10.1002/ecs2.2178 |
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ftunivpau:oai:HAL:hal-01773150v1 2023-11-12T04:14:39+01:00 Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon Bouchard, Colin Bardonnet, Agnes Buoro, Mathieu Tentelier, Cédric Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA) 2018 https://hal.science/hal-01773150 https://hal.science/hal-01773150/document https://hal.science/hal-01773150/file/2018_Bouchard_Ecosphere.pdf https://doi.org/10.1002/ecs2.2178 en eng HAL CCSD Ecological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1002/ecs2.2178 hal-01773150 https://hal.science/hal-01773150 https://hal.science/hal-01773150/document https://hal.science/hal-01773150/file/2018_Bouchard_Ecosphere.pdf doi:10.1002/ecs2.2178 PRODINRA: 427231 WOS: 000435729400008 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2150-8925 Ecosphere https://hal.science/hal-01773150 Ecosphere, 2018, 9 (4), 18 p. ⟨10.1002/ecs2.2178⟩ https://esajournals.onlinelibrary.wiley.com/journal/21508925 spatial distribution spatial heterogeneity salmon spawning grounds nest population dynamics atlantic beverton-holt breeding site clustering density compensation environmental stochasticity patchiness population dynamic salmo salar dynamique des populations nivelle site de reproduction frayère nid distribution spatiale [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2018 ftunivpau https://doi.org/10.1002/ecs2.2178 2023-10-15T20:57:00Z International audience Spatial aggregation within a population is a widespread phenomenon which may both exacerbate local competition and the stochastic effect of local environmental perturbations. In particular, the spatial aggregation of nests may strongly affect recruitment and hence population dynamics. Although the negative effect of local density on local recruitment has often been theoretically extended to population dynamics, very few studies have demonstrated the effect of local aggregation on the whole population recruitment. Using a long-term survey of a small Atlantic salmon population, we tested the effect of spatial aggregation on the whole population recruitment and whether accounting for population stock is important or not when explaining the population recruitment. We found that accounting for population stock is necessary and that spatial aggregation of nests improved estimates of population recruitment. The spatial aggregation of nests did not impact the average population recruitment; however, a stronger aggregationdiminished the variability of population recruitment. Our findings suggest that the aggregation of nests among some breeding areas does not necessarily impair the whole population recruitment and significantly reduces the stochasticity of the recruitment. In addition, the aggregation of nests seems to be the result of an ideal distribution of females, selecting the best-breeding sites. Our results also indicate that females select breeding sites on environmental risk to spawn within the safest sites. This study warns against the extrapolation of local density dependence observations to the population level, and advocates for investigating the effect of aggregation on the demographic and evolutionary population dynamics, a clear contribution of aggregation on population dynamic processes being found in the Nivelle population. Article in Journal/Newspaper Atlantic salmon Salmo salar HAL e2s UPPA (Université de Pau et des Pays de l'Adour) Ecosphere 9 4 |
institution |
Open Polar |
collection |
HAL e2s UPPA (Université de Pau et des Pays de l'Adour) |
op_collection_id |
ftunivpau |
language |
English |
topic |
spatial distribution spatial heterogeneity salmon spawning grounds nest population dynamics atlantic beverton-holt breeding site clustering density compensation environmental stochasticity patchiness population dynamic salmo salar dynamique des populations nivelle site de reproduction frayère nid distribution spatiale [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
spatial distribution spatial heterogeneity salmon spawning grounds nest population dynamics atlantic beverton-holt breeding site clustering density compensation environmental stochasticity patchiness population dynamic salmo salar dynamique des populations nivelle site de reproduction frayère nid distribution spatiale [SDE.BE]Environmental Sciences/Biodiversity and Ecology Bouchard, Colin Bardonnet, Agnes Buoro, Mathieu Tentelier, Cédric Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon |
topic_facet |
spatial distribution spatial heterogeneity salmon spawning grounds nest population dynamics atlantic beverton-holt breeding site clustering density compensation environmental stochasticity patchiness population dynamic salmo salar dynamique des populations nivelle site de reproduction frayère nid distribution spatiale [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience Spatial aggregation within a population is a widespread phenomenon which may both exacerbate local competition and the stochastic effect of local environmental perturbations. In particular, the spatial aggregation of nests may strongly affect recruitment and hence population dynamics. Although the negative effect of local density on local recruitment has often been theoretically extended to population dynamics, very few studies have demonstrated the effect of local aggregation on the whole population recruitment. Using a long-term survey of a small Atlantic salmon population, we tested the effect of spatial aggregation on the whole population recruitment and whether accounting for population stock is important or not when explaining the population recruitment. We found that accounting for population stock is necessary and that spatial aggregation of nests improved estimates of population recruitment. The spatial aggregation of nests did not impact the average population recruitment; however, a stronger aggregationdiminished the variability of population recruitment. Our findings suggest that the aggregation of nests among some breeding areas does not necessarily impair the whole population recruitment and significantly reduces the stochasticity of the recruitment. In addition, the aggregation of nests seems to be the result of an ideal distribution of females, selecting the best-breeding sites. Our results also indicate that females select breeding sites on environmental risk to spawn within the safest sites. This study warns against the extrapolation of local density dependence observations to the population level, and advocates for investigating the effect of aggregation on the demographic and evolutionary population dynamics, a clear contribution of aggregation on population dynamic processes being found in the Nivelle population. |
author2 |
Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA) |
format |
Article in Journal/Newspaper |
author |
Bouchard, Colin Bardonnet, Agnes Buoro, Mathieu Tentelier, Cédric |
author_facet |
Bouchard, Colin Bardonnet, Agnes Buoro, Mathieu Tentelier, Cédric |
author_sort |
Bouchard, Colin |
title |
Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon |
title_short |
Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon |
title_full |
Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon |
title_fullStr |
Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon |
title_full_unstemmed |
Effects of spatial aggregation of nests on population recruitment: the case of a small population of Atlantic salmon |
title_sort |
effects of spatial aggregation of nests on population recruitment: the case of a small population of atlantic salmon |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01773150 https://hal.science/hal-01773150/document https://hal.science/hal-01773150/file/2018_Bouchard_Ecosphere.pdf https://doi.org/10.1002/ecs2.2178 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
ISSN: 2150-8925 Ecosphere https://hal.science/hal-01773150 Ecosphere, 2018, 9 (4), 18 p. ⟨10.1002/ecs2.2178⟩ https://esajournals.onlinelibrary.wiley.com/journal/21508925 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ecs2.2178 hal-01773150 https://hal.science/hal-01773150 https://hal.science/hal-01773150/document https://hal.science/hal-01773150/file/2018_Bouchard_Ecosphere.pdf doi:10.1002/ecs2.2178 PRODINRA: 427231 WOS: 000435729400008 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/ecs2.2178 |
container_title |
Ecosphere |
container_volume |
9 |
container_issue |
4 |
_version_ |
1782332258112241664 |