Keystone species: toward an operational concept for marine biodiversity conservation
International audience Various definitions and indices have been proposed in the literature to identify keystone species. In this study, we intended to make the concept of keystone species operational for marine biodiversity conservation. We used an exclusive definition of keystone species, based on...
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ftunimontpellier:oai:HAL:hal-01840230v1 2024-06-23T07:57:12+00:00 Keystone species: toward an operational concept for marine biodiversity conservation Valls, Audrey Coll, Marta Christensen, Villy MARine Biodiversity Exploitation and Conservation (UMR MARBEC) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) 2015-02 https://hal.science/hal-01840230 https://doi.org/10.1890/14-0306.1 en eng HAL CCSD Ecological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1890/14-0306.1 hal-01840230 https://hal.science/hal-01840230 doi:10.1890/14-0306.1 ISSN: 0012-9615 EISSN: 1557-7015 Ecological monographs https://hal.science/hal-01840230 Ecological monographs, 2015, 85 (1), pp.29-47. ⟨10.1890/14-0306.1⟩ classification tree Ecopath model food-web structure index of keystoneness keystone species marine ecosystems Meta-analysis mixed-trophic impact rank correlation tests scoring method [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/article Journal articles 2015 ftunimontpellier https://doi.org/10.1890/14-0306.1 2024-05-27T14:36:36Z International audience Various definitions and indices have been proposed in the literature to identify keystone species. In this study, we intended to make the concept of keystone species operational for marine biodiversity conservation. We used an exclusive definition of keystone species, based on the original concept of keystone predator, and derived a new functional index of keystoneness (KS) from an ecosystem-modeling approach. First, several KS indices were formulated, by combining measures of the mixed-trophic impact (MTI) and biomass of species. Then, a meta-analysis was performed, based on 101 published Ecopath food-web models, selected with a scoring method, and representative of the variety of marine ecosystems worldwide. The indices were applied to the models, and two statistical methods were compared to select the most promising KS index. Rank correlation tests were performed to assess the balance between the contribution of the impact and biomass components to the different KS indices. In addition, a classification tree was implemented, based on ecosystem-specific thresholds applied to the latter species traits, and used to confirm the identified keystone species. The selected index obtained the highest number of models with positive results from both the rank correlation tests and the classification tree. We also demonstrated the limitations of existing KS indices previously applied in the literature. Species were ranked according to their estimates of keystoneness with the selected KS index, so that potential keystone species were quantitatively identified in the 101 modeled food webs. The standardized modeling approach allowed for a comparison of the identified keystone species across models: cartilaginous fishes and toothed whales obtained the highest occurrences. Finally, the selected KS index was applied to the well-known case study of Prince William Sound (Alaska, USA). Potentially significant anthropogenic (fishing) impacts on keystone species were also considered and discussed. The ... Article in Journal/Newspaper toothed whales Alaska Université de Montpellier: HAL Ecological Monographs 85 1 29 47 |
institution |
Open Polar |
collection |
Université de Montpellier: HAL |
op_collection_id |
ftunimontpellier |
language |
English |
topic |
classification tree Ecopath model food-web structure index of keystoneness keystone species marine ecosystems Meta-analysis mixed-trophic impact rank correlation tests scoring method [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
classification tree Ecopath model food-web structure index of keystoneness keystone species marine ecosystems Meta-analysis mixed-trophic impact rank correlation tests scoring method [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Valls, Audrey Coll, Marta Christensen, Villy Keystone species: toward an operational concept for marine biodiversity conservation |
topic_facet |
classification tree Ecopath model food-web structure index of keystoneness keystone species marine ecosystems Meta-analysis mixed-trophic impact rank correlation tests scoring method [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
description |
International audience Various definitions and indices have been proposed in the literature to identify keystone species. In this study, we intended to make the concept of keystone species operational for marine biodiversity conservation. We used an exclusive definition of keystone species, based on the original concept of keystone predator, and derived a new functional index of keystoneness (KS) from an ecosystem-modeling approach. First, several KS indices were formulated, by combining measures of the mixed-trophic impact (MTI) and biomass of species. Then, a meta-analysis was performed, based on 101 published Ecopath food-web models, selected with a scoring method, and representative of the variety of marine ecosystems worldwide. The indices were applied to the models, and two statistical methods were compared to select the most promising KS index. Rank correlation tests were performed to assess the balance between the contribution of the impact and biomass components to the different KS indices. In addition, a classification tree was implemented, based on ecosystem-specific thresholds applied to the latter species traits, and used to confirm the identified keystone species. The selected index obtained the highest number of models with positive results from both the rank correlation tests and the classification tree. We also demonstrated the limitations of existing KS indices previously applied in the literature. Species were ranked according to their estimates of keystoneness with the selected KS index, so that potential keystone species were quantitatively identified in the 101 modeled food webs. The standardized modeling approach allowed for a comparison of the identified keystone species across models: cartilaginous fishes and toothed whales obtained the highest occurrences. Finally, the selected KS index was applied to the well-known case study of Prince William Sound (Alaska, USA). Potentially significant anthropogenic (fishing) impacts on keystone species were also considered and discussed. The ... |
author2 |
MARine Biodiversity Exploitation and Conservation (UMR MARBEC) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Valls, Audrey Coll, Marta Christensen, Villy |
author_facet |
Valls, Audrey Coll, Marta Christensen, Villy |
author_sort |
Valls, Audrey |
title |
Keystone species: toward an operational concept for marine biodiversity conservation |
title_short |
Keystone species: toward an operational concept for marine biodiversity conservation |
title_full |
Keystone species: toward an operational concept for marine biodiversity conservation |
title_fullStr |
Keystone species: toward an operational concept for marine biodiversity conservation |
title_full_unstemmed |
Keystone species: toward an operational concept for marine biodiversity conservation |
title_sort |
keystone species: toward an operational concept for marine biodiversity conservation |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01840230 https://doi.org/10.1890/14-0306.1 |
genre |
toothed whales Alaska |
genre_facet |
toothed whales Alaska |
op_source |
ISSN: 0012-9615 EISSN: 1557-7015 Ecological monographs https://hal.science/hal-01840230 Ecological monographs, 2015, 85 (1), pp.29-47. ⟨10.1890/14-0306.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1890/14-0306.1 hal-01840230 https://hal.science/hal-01840230 doi:10.1890/14-0306.1 |
op_doi |
https://doi.org/10.1890/14-0306.1 |
container_title |
Ecological Monographs |
container_volume |
85 |
container_issue |
1 |
container_start_page |
29 |
op_container_end_page |
47 |
_version_ |
1802650723989585920 |