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Predicting Off-Site Impacts on Breeding Success of the Marsh Harrier

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Title: Predicting Off-Site Impacts on Breeding Success of the Marsh Harrier
Authors: Senzaki, Masayuki Browse this author
Yamaura, Yuichi Browse this author →KAKEN DB
Nakamura, Futoshi Browse this author →KAKEN DB
Keywords: abundance
hierarchical model
land-use change
off-site impacts
reproductive success
spatial scale
Issue Date: Aug-2017
Publisher: John Wiley & Sons
Journal Title: Journal of wildlife management
Volume: 81
Issue: 6
Start Page: 973
End Page: 981
Publisher DOI: 10.1002/jwmg.21266
Abstract: Construction of buildings, and other types of land uses by humans can exert negative impacts on wildlife that live in the areas surrounding such developments (i.e., off-site impacts). To reduce or lessen such impacts, it is important to determine the biological metrics (e.g., abundance, breeding success) that are affected and at which spatial scales. We monitored the eastern marsh harrier (Circus spilonotus) breeding in wetland patches in northern Japan for 4 years and quantified its abundance (no. pairs) and breeding success (no. juveniles) in natural environments compared to artificial land uses in the surrounding areas. We developed a hierarchical model to simultaneously infer the effects of foraging habitats and artificial land uses on the numbers of pairs and juveniles. We found that the amount of foraging habitat within 0.5 km of wetland patches positively influenced the number of pairs per patch and that the amount of artificial land use within 2.0 km from the patches negatively influenced the number of pairs per patch and the number of juveniles per pair. The number of juveniles per patch was therefore affected by these 2 features and was most susceptible to increased land use by humans within 2.0 km from the patches. Our results can be used to predict the magnitudes of off-site impacts on eastern marsh harriers before any additional development occurs. To effectively manage off-site impacts, we highlight the importance of considering species abundance and the biological processes mediating breeding success that are possibly affected by different land uses. (C) 2017 The Wildlife Society.
Rights: This is the peer reviewed version of the following article: Journal of wildlife management; 81(6); 973-981; 2017 Aug, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 先崎 理之

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