Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species
Migratory shorebirds select stopover sites to fuel their migration across heterogeneous coastal landscapes with abundant prey resources. Quantifying the degree of dietary specialization between closely-related species and how they partition resources across different coastal habitat types during bot...
Published in: | Estuarine, Coastal and Shelf Science |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
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Online Access: | https://doi.org/10.1016/j.ecss.2020.106990 http://researchrepository.napier.ac.uk/Output/2946790 |
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ftnapieruniv:oai:repository@napier.ac.uk:2946790 2023-05-15T16:08:31+02:00 Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species Li, Donglai Zhang, Jing Liu, Yu Lloyd, Huw Pagani-Núñez, Emilio Zhang, Zhengwang 2020-08-30 https://doi.org/10.1016/j.ecss.2020.106990 http://researchrepository.napier.ac.uk/Output/2946790 unknown Elsevier http://researchrepository.napier.ac.uk/Output/2946790 doi:https://doi.org/10.1016/j.ecss.2020.106990 0272-7714 10.1016/j.ecss.2020.106990 Diet specialization Migration Foraging ecology Mixed models Coastal wetlands Numenius species Journal Article 2020 ftnapieruniv https://doi.org/10.1016/j.ecss.2020.106990 2022-11-03T23:40:55Z Migratory shorebirds select stopover sites to fuel their migration across heterogeneous coastal landscapes with abundant prey resources. Quantifying the degree of dietary specialization between closely-related species and how they partition resources across different coastal habitat types during both spring and autumn migration could identify some interesting possibilities for conservation management given the extent of anthropogenic habitat degradation at critical stopover sites. Here we used a comparative approach to examine diet specialization and feeding rates of two migratory Numenius curlew species, Far Eastern Curlew Numenius madagascariensis and Eurasian Curlew N. arquata populations, at an important stopover site in the Yellow Sea, China, and to assess the influence of habitat type, presence of human disturbance (activities related to aquaculture and oil production), and migratory season on their feeding behavior. Far Eastern Curlews were more dependent on tidal crabs and exhibited less dietary flexibility than its closely-related congener. Feeding rates on crabs by Far Eastern Curlews were not significantly different between mudflat and Suaeda salsa saltmarsh habitat but were negatively influenced by human disturbance and were higher during spring migration. In contrast, these effects were not apparent for Eurasian Curlew which fed predominantly on ragworms in saltmarsh habitat. The differences in prey type and feeding rates between adjacent habitats and migration seasons could explain how these two congeners fit syntopically along coastal wetland resource gradients. The extensive utilization of S. salsa habitat by both species suggests that saltmarshes represent an important feeding habitat for these species and that further conservation efforts aimed at reducing human disturbance would benefit both species and may lead to improved feeding rates for Far Eastern Curlews. Article in Journal/Newspaper Eurasian Curlew Edinburgh Napier Repository (Napier University Edinburgh) Estuarine, Coastal and Shelf Science 245 106990 |
institution |
Open Polar |
collection |
Edinburgh Napier Repository (Napier University Edinburgh) |
op_collection_id |
ftnapieruniv |
language |
unknown |
topic |
Diet specialization Migration Foraging ecology Mixed models Coastal wetlands Numenius species |
spellingShingle |
Diet specialization Migration Foraging ecology Mixed models Coastal wetlands Numenius species Li, Donglai Zhang, Jing Liu, Yu Lloyd, Huw Pagani-Núñez, Emilio Zhang, Zhengwang Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species |
topic_facet |
Diet specialization Migration Foraging ecology Mixed models Coastal wetlands Numenius species |
description |
Migratory shorebirds select stopover sites to fuel their migration across heterogeneous coastal landscapes with abundant prey resources. Quantifying the degree of dietary specialization between closely-related species and how they partition resources across different coastal habitat types during both spring and autumn migration could identify some interesting possibilities for conservation management given the extent of anthropogenic habitat degradation at critical stopover sites. Here we used a comparative approach to examine diet specialization and feeding rates of two migratory Numenius curlew species, Far Eastern Curlew Numenius madagascariensis and Eurasian Curlew N. arquata populations, at an important stopover site in the Yellow Sea, China, and to assess the influence of habitat type, presence of human disturbance (activities related to aquaculture and oil production), and migratory season on their feeding behavior. Far Eastern Curlews were more dependent on tidal crabs and exhibited less dietary flexibility than its closely-related congener. Feeding rates on crabs by Far Eastern Curlews were not significantly different between mudflat and Suaeda salsa saltmarsh habitat but were negatively influenced by human disturbance and were higher during spring migration. In contrast, these effects were not apparent for Eurasian Curlew which fed predominantly on ragworms in saltmarsh habitat. The differences in prey type and feeding rates between adjacent habitats and migration seasons could explain how these two congeners fit syntopically along coastal wetland resource gradients. The extensive utilization of S. salsa habitat by both species suggests that saltmarshes represent an important feeding habitat for these species and that further conservation efforts aimed at reducing human disturbance would benefit both species and may lead to improved feeding rates for Far Eastern Curlews. |
format |
Article in Journal/Newspaper |
author |
Li, Donglai Zhang, Jing Liu, Yu Lloyd, Huw Pagani-Núñez, Emilio Zhang, Zhengwang |
author_facet |
Li, Donglai Zhang, Jing Liu, Yu Lloyd, Huw Pagani-Núñez, Emilio Zhang, Zhengwang |
author_sort |
Li, Donglai |
title |
Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species |
title_short |
Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species |
title_full |
Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species |
title_fullStr |
Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species |
title_full_unstemmed |
Differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory Numenius curlew species |
title_sort |
differences in dietary specialization, habitat use and susceptibility to human disturbance influence feeding rates and resource partitioning between two migratory numenius curlew species |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.ecss.2020.106990 http://researchrepository.napier.ac.uk/Output/2946790 |
genre |
Eurasian Curlew |
genre_facet |
Eurasian Curlew |
op_relation |
http://researchrepository.napier.ac.uk/Output/2946790 doi:https://doi.org/10.1016/j.ecss.2020.106990 0272-7714 10.1016/j.ecss.2020.106990 |
op_doi |
https://doi.org/10.1016/j.ecss.2020.106990 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
245 |
container_start_page |
106990 |
_version_ |
1766404560443670528 |