Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model
Two emblematic anadromous species of the Northern Atlantic coasts, allis shad and the American shad, have undergone a drastic decline of their populations over the last century. On that, a better understanding of the remaining “knowledge gaps” related to their ecology and population dynamics, especi...
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Online Access: | https://theses.hal.science/tel-03875846 https://theses.hal.science/tel-03875846/document https://theses.hal.science/tel-03875846/file/POULET_CAMILLE_2022.pdf |
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ftunivnantes:oai:HAL:tel-03875846v1 2023-05-15T17:36:56+02:00 Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model Écologie et conservation des aloses de la façade atlantique dans un contexte global changeant : apports d’un modèle mécaniste de distribution Poulet, Camille Ecosystèmes aquatiques et changements globaux (UR EABX) Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de Bordeaux Géraldine Lassalle Patrick Lambert 2022-03-24 https://theses.hal.science/tel-03875846 https://theses.hal.science/tel-03875846/document https://theses.hal.science/tel-03875846/file/POULET_CAMILLE_2022.pdf fr fre HAL CCSD NNT: 2022BORD0109 tel-03875846 https://theses.hal.science/tel-03875846 https://theses.hal.science/tel-03875846/document https://theses.hal.science/tel-03875846/file/POULET_CAMILLE_2022.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-03875846 Ecologie, Environnement. Université de Bordeaux, 2022. Français. ⟨NNT : 2022BORD0109⟩ Shads Conservation Temperature Species distribution models Population dynamics Aloses Température Modèles de distribution d’espèce Dynamique de population [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/doctoralThesis Theses 2022 ftunivnantes 2023-03-08T01:07:55Z Two emblematic anadromous species of the Northern Atlantic coasts, allis shad and the American shad, have undergone a drastic decline of their populations over the last century. On that, a better understanding of the remaining “knowledge gaps” related to their ecology and population dynamics, especially at sea, is required to implement appropriate conservation policies and ensure the recovery and sustainability of both species and the ecosystem services they provide to human societies. Mechanistic species distribution models are useful tools to tackle these remaining knowledge gaps, since they enable the exploration of the population dynamics at a large spatio- temporal scale and allow modelers to test different scenarios and/or ecological hypotheses that cannot be addressed otherwise by field monitoring or lab experiments. In this study, the mechanistic species distribution model, GR3D (Global Repositioning Dynamics for Diadromous fish Distribution), which was first developed for allis shad in Western Europe, was adapted to fit the American shad ecology across the Eastern U.S. coast. The model application to this new species implied a reconfiguration of the marine environment implemented into GR3D, by including trophic migrations of individuals at sea. In addition, the exploration of the GR3DUS model through a sensitivity analysis has underlined the role of dispersal and depensatory forces in the spatial structure of American shad populations. In the same way, the integration of a new nutrient calculator within GR3DEU primarily required the distinction between males and females into the model and then, provided a first quantification of the regulation service (i.e. nutrient fluxes) operated by allis shad at the scale of its distribution range. Finally, a comparative ecology approach, simulating the population dynamics of the two species on both Atlantic coasts, allowed deepened investigation of the role played by temperature and dispersal in the dynamics behind their distribution and their metapopulation ... Doctoral or Postdoctoral Thesis North Atlantic Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
Shads Conservation Temperature Species distribution models Population dynamics Aloses Température Modèles de distribution d’espèce Dynamique de population [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
Shads Conservation Temperature Species distribution models Population dynamics Aloses Température Modèles de distribution d’espèce Dynamique de population [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Poulet, Camille Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model |
topic_facet |
Shads Conservation Temperature Species distribution models Population dynamics Aloses Température Modèles de distribution d’espèce Dynamique de population [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
description |
Two emblematic anadromous species of the Northern Atlantic coasts, allis shad and the American shad, have undergone a drastic decline of their populations over the last century. On that, a better understanding of the remaining “knowledge gaps” related to their ecology and population dynamics, especially at sea, is required to implement appropriate conservation policies and ensure the recovery and sustainability of both species and the ecosystem services they provide to human societies. Mechanistic species distribution models are useful tools to tackle these remaining knowledge gaps, since they enable the exploration of the population dynamics at a large spatio- temporal scale and allow modelers to test different scenarios and/or ecological hypotheses that cannot be addressed otherwise by field monitoring or lab experiments. In this study, the mechanistic species distribution model, GR3D (Global Repositioning Dynamics for Diadromous fish Distribution), which was first developed for allis shad in Western Europe, was adapted to fit the American shad ecology across the Eastern U.S. coast. The model application to this new species implied a reconfiguration of the marine environment implemented into GR3D, by including trophic migrations of individuals at sea. In addition, the exploration of the GR3DUS model through a sensitivity analysis has underlined the role of dispersal and depensatory forces in the spatial structure of American shad populations. In the same way, the integration of a new nutrient calculator within GR3DEU primarily required the distinction between males and females into the model and then, provided a first quantification of the regulation service (i.e. nutrient fluxes) operated by allis shad at the scale of its distribution range. Finally, a comparative ecology approach, simulating the population dynamics of the two species on both Atlantic coasts, allowed deepened investigation of the role played by temperature and dispersal in the dynamics behind their distribution and their metapopulation ... |
author2 |
Ecosystèmes aquatiques et changements globaux (UR EABX) Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université de Bordeaux Géraldine Lassalle Patrick Lambert |
format |
Doctoral or Postdoctoral Thesis |
author |
Poulet, Camille |
author_facet |
Poulet, Camille |
author_sort |
Poulet, Camille |
title |
Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model |
title_short |
Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model |
title_full |
Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model |
title_fullStr |
Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model |
title_full_unstemmed |
Ecology and conservation of North-Atlantic shads in a global changing context : inputs from a mechanistic species distribution model |
title_sort |
ecology and conservation of north-atlantic shads in a global changing context : inputs from a mechanistic species distribution model |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://theses.hal.science/tel-03875846 https://theses.hal.science/tel-03875846/document https://theses.hal.science/tel-03875846/file/POULET_CAMILLE_2022.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
https://theses.hal.science/tel-03875846 Ecologie, Environnement. Université de Bordeaux, 2022. Français. ⟨NNT : 2022BORD0109⟩ |
op_relation |
NNT: 2022BORD0109 tel-03875846 https://theses.hal.science/tel-03875846 https://theses.hal.science/tel-03875846/document https://theses.hal.science/tel-03875846/file/POULET_CAMILLE_2022.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766136599653908480 |