Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset
The main objective of this long-term study (1978-2016) was to find the underlying factors behind the declining trends of eider Somateria mollissima in the Baltic/Wadden Sea. Specifically, we aimed at quantifying the bottom-up effect of nutrients, through mussel stocks, on reproduction and abundance...
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Online Access: | https://doi.org/10.5061/dryad.qv9s4mwdm |
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ftzenodo:oai:zenodo.org:4667861 2024-09-15T18:10:35+00:00 Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset Morelli, Federico Laursen, Karsten Svitok, Marek Benedetti, Yanina Pape Møller, Anders 2021-04-06 https://doi.org/10.5061/dryad.qv9s4mwdm unknown Zenodo https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.qv9s4mwdm oai:zenodo.org:4667861 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode macro-nutrients eagles eiders bottom-up and top-down effects info:eu-repo/semantics/other 2021 ftzenodo https://doi.org/10.5061/dryad.qv9s4mwdm 2024-07-27T04:39:32Z The main objective of this long-term study (1978-2016) was to find the underlying factors behind the declining trends of eider Somateria mollissima in the Baltic/Wadden Sea. Specifically, we aimed at quantifying the bottom-up effect of nutrients, through mussel stocks, on reproduction and abundance of eider, and the top-down effects caused by white-tailed eagle Haliaeetus albicilla predation. Bottom-up effects increase marine primary productivity with subsequent effects on food availability for a major mussel predator. Top-down effects may also regulate eider populations because during incubation female eiders are vulnerable to predation by eagles. Our structural equation modelling explained a large percentage of the variance in eider abundance. We conclude that the Baltic/Wadden Sea eider population was regulated directly by white-tailed sea-eagle predation on incubating females and indirectly by the amount of nutrients in seawater affecting both mussel stocks and the breeding success of eiders, reflecting density dependence. These findings may explain the decreasing trend in the Baltic/Wadden Sea eider population during the last decades as an additive effect of top-down and bottom-up factors, and likely as an interaction between them. The dataset contains the metadata in the second excel sheet, describing each field. Additional information about the dataset could be asked to the corresponding author: E-mail: anders.moller@u-psud.fr Other/Unknown Material Haliaeetus albicilla Somateria mollissima White-tailed eagle Zenodo |
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unknown |
topic |
macro-nutrients eagles eiders bottom-up and top-down effects |
spellingShingle |
macro-nutrients eagles eiders bottom-up and top-down effects Morelli, Federico Laursen, Karsten Svitok, Marek Benedetti, Yanina Pape Møller, Anders Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset |
topic_facet |
macro-nutrients eagles eiders bottom-up and top-down effects |
description |
The main objective of this long-term study (1978-2016) was to find the underlying factors behind the declining trends of eider Somateria mollissima in the Baltic/Wadden Sea. Specifically, we aimed at quantifying the bottom-up effect of nutrients, through mussel stocks, on reproduction and abundance of eider, and the top-down effects caused by white-tailed eagle Haliaeetus albicilla predation. Bottom-up effects increase marine primary productivity with subsequent effects on food availability for a major mussel predator. Top-down effects may also regulate eider populations because during incubation female eiders are vulnerable to predation by eagles. Our structural equation modelling explained a large percentage of the variance in eider abundance. We conclude that the Baltic/Wadden Sea eider population was regulated directly by white-tailed sea-eagle predation on incubating females and indirectly by the amount of nutrients in seawater affecting both mussel stocks and the breeding success of eiders, reflecting density dependence. These findings may explain the decreasing trend in the Baltic/Wadden Sea eider population during the last decades as an additive effect of top-down and bottom-up factors, and likely as an interaction between them. The dataset contains the metadata in the second excel sheet, describing each field. Additional information about the dataset could be asked to the corresponding author: E-mail: anders.moller@u-psud.fr |
format |
Other/Unknown Material |
author |
Morelli, Federico Laursen, Karsten Svitok, Marek Benedetti, Yanina Pape Møller, Anders |
author_facet |
Morelli, Federico Laursen, Karsten Svitok, Marek Benedetti, Yanina Pape Møller, Anders |
author_sort |
Morelli, Federico |
title |
Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset |
title_short |
Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset |
title_full |
Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset |
title_fullStr |
Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset |
title_full_unstemmed |
Eiders, nutrients and eagles: Bottom-up and top-down population dynamics in a marine bird_dataset |
title_sort |
eiders, nutrients and eagles: bottom-up and top-down population dynamics in a marine bird_dataset |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.5061/dryad.qv9s4mwdm |
genre |
Haliaeetus albicilla Somateria mollissima White-tailed eagle |
genre_facet |
Haliaeetus albicilla Somateria mollissima White-tailed eagle |
op_relation |
https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.qv9s4mwdm oai:zenodo.org:4667861 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.qv9s4mwdm |
_version_ |
1810448182893608960 |