Aguilera Nuñez, Guillermo
(2020).
Local and landscape-level impacts of agricultural intensification on arthropod communities and their interaction networks.
Diss. (sammanfattning/summary)
Sveriges lantbruksuniv.,
Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-634-5
eISBN 978-91-7760-635-2
[Doctoral thesis]
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Abstract
Arthropods play a central role in agricultural landscapes being responsible for the delivery of many ecosystem services such as pollination, biological pest control, and nutrient cycling. But the current global decline of arthropods is intensified by habitat modification, loss and fragmentation, pesticide use and other intensive management practices. Thus, it is crucial to understand how such impacts affect ecosystem services provisioning. In this thesis, I aim to explore how the management of local crop fields and landscape composition affect beneficial arthropod communities at different levels, including abundances and diversity of species and species interaction networks. I focus on predaceous and parasitic insects that provide biological pest control and pollinators. I assess i) how crop diversity affects arthropod diversity, ii) how fertilisation affects the local predator community and pest control, iii) how crop type (annual vs perennial) and landscape composition affect the predator-prey and host-parasitoid interaction networks and the implications for pest control. I found that increasing crop diversity in landscapes with a high proportion of seminatural habitats can enhance the diversity of beneficial arthropods. I also detected that organic fertilisation can benefit the abundance of local predators while specialist predators that move into the crop from the surrounding habitats boost biological pest control. I also found that crop type and landscape composition have effects beyond community species composition as also the interaction networks were altered, modifying the network stability and pest control potential. My findings suggest that the main drivers of change in agricultural landscapes affect arthropod communities at different levels. Effects of habitat type and local management can be observed not only in the community composition, but some of the consequences were also reflected in the species interaction networks. Finally, I show that food web ecology can link community composition and ecosystem service provisioning.
Authors/Creators: | Aguilera Nuñez, Guillermo | ||||
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Title: | Local and landscape-level impacts of agricultural intensification on arthropod communities and their interaction networks | ||||
Alternative abstract: |
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Series Name/Journal: | Acta Universitatis Agriculturae Sueciae | ||||
Year of publishing : | 2020 | ||||
Number: | 2020:58 | ||||
Number of Pages: | 69 | ||||
Publisher: | Department of Ecology, Swedish University of Agricultural Sciences | ||||
ISBN for printed version: | 978-91-7760-634-5 | ||||
ISBN for electronic version: | 978-91-7760-635-2 | ||||
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 (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science | ||||
Keywords: | Crop diversity, Fertilisation, Community composition, Pest control, Pollination, Species interaction, Robustness, Apparent competition | ||||
URN:NBN: | urn:nbn:se:slu:epsilon-p-108486 | ||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108486 | ||||
ID Code: | 18142 | ||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap | ||||
Department: | (NL, NJ) > Dept. of Ecology (S) > Dept. of Ecology | ||||
Deposited By: | SLUpub Connector | ||||
Deposited On: | 06 Nov 2020 18:23 | ||||
Metadata Last Modified: | 15 Jan 2021 19:16 |
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