Eur. J. Entomol. 115: 372-379, 2018 | DOI: 10.14411/eje.2018.037
Stones on the ground in olive groves promote the presence of spiders (Araneae)Original article
- 1 Centro de Investigação de Montanha (CIMO), ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal; e-mails: jbenma@hotmail.com, jpereira@ipb.pt
- 2 Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; e-mail: jps@zoo.uc.pt
- 3 Department of Animal Biology, Plant Biology and Ecology, Faculty of Biosciences, Autonomous University of Barcelona, 08193 Bellaterra, Barcelona, Spain; e-mail: JoseAntonio.Barrientos@uab.cat
- 4 CIQuiBio, Barreiro School of Technology, Polytechnic Institute of Setúbal, Rua Américo da Silva Marinho, 2839-001 Lavradio, Portugal; e-mail: sonia.santos@estbarreiro.ips.pt
- 5 LEAF, Instituto Superior de Agronomia, Tapada da Ajuda, 1349-017 Lisboa, Portugal
Spiders are generalist predators that contribute to the control of pests in agroecosystems. Land use management determines habitats including refuges for hibernation and aestivation. The availability of shelters on the ground can be crucial for maintaining populations of spider within crops. We studied the effect of the number of stones on the surface of the soil on the spider community in selected olive groves in Trás-os-Montes (northeastern Portugal). The number of stones significantly influenced the overall diversity of spiders, abundance of immature individuals and abundance of ground hunters. Agricultural management practices aimed at the conservation of soil microhabitats such as hedgerows, stonewalls and stones on the ground should be promoted in order to maintain or increase the number of shelters for potential natural enemies of pests.
Keywords: Araneae, biological control, ground hunter, predator, abundance, diversity, shelter
Received: April 3, 2018; Revised: July 19, 2018; Accepted: July 19, 2018; Published online: August 7, 2018 Show citation
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