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Large grazing birds and crop damage : investigating spatial and temporal patterns to guide management practices

Montras Janer, Teresa (2021). Large grazing birds and crop damage : investigating spatial and temporal patterns to guide management practices. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-68-2
eISBN 978-91-7760-681-9
[Doctoral thesis]

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Abstract

Populations of geese, swans and cranes (i.e., large grazing birds) are increasing in Europe and North America, raising conflicts between conservation and farming interests when, foraging in agricultural fields (often in the vicinity of wetlands), cause yield loss for farmers. The aim of this thesis is to increase the understanding of spatial and temporal patterns of large grazing birds and their crop damage to improve future management practices. At the national level, crop damage was found to be positively related to national estimates of bird abundance. At the regional level, crop damage followed seasonal patterns associated with vulnerable stages of crops and the crop selection by the culprit species. Seasonal patterns remained consistent over the years but differed across the country, relating to the spatial distribution of different crops and culprit species. Large grazing birds showed a clustered spatial distribution across the country with distinct hotspots of high abundance. The spatial variation in abundance of large grazing birds were largely reflected in a corresponding spatial pattern of crop damage as reported by farmers. The complexity of the system (e.g., weather dependence, opportunistic behaviour of the birds) and the coarse temporal and spatial resolution of the available data probably caused model predictions of crop damage to be characterized by large uncertainties. My results suggest that it is necessary to integrate management strategies across different spatial and temporal scales when implementing current and future management actions for crop damage prevention.

Authors/Creators:Montras Janer, Teresa
Title:Large grazing birds and crop damage : investigating spatial and temporal patterns to guide management practices
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2021
Number:2021:1
Number of Pages:83
Publisher:Department of Ecology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-68-2
ISBN for electronic version:978-91-7760-681-9
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:agriculture, Anser, Branta, conservation conflicts, crop protection, Cygnus, Grus, human-wildlife interactions, wildlife damage management
URN:NBN:urn:nbn:se:slu:epsilon-p-109840
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109840
ID Code:21254
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:18 Jan 2021 11:03
Metadata Last Modified:21 Jan 2021 13:46

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