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פותח על ידי קלירמאש פתרונות בע"מ -
Use of alternative habitats by spiders in a desert agroecosystem
Year:
2017
Source of publication :
Journal of Arachnology
Authors :
וינטראוב, פיליס
;
.
Volume :
45
Co-Authors:

Itai Opatovsky - Regional Agricultural Research and Development Center, Southern Branch (Besor) 85400, Israel and Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel; 
Iris Musli and Yael Lubin - Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel

Facilitators :
From page:
129
To page:
138
(
Total pages:
10
)
Abstract:

Annual crop fields are short-lived and disturbed environments. Therefore, sustainable populations of natural enemies in these fields must be maintained by repeated colonization each season from habitats outside the crop fields. In desert agroecosystems, unmanaged habitats differ greatly in abiotic and biotic conditions from croplands, creating potentially significant barriers to movement of predators. We asked here: to what extent do predators use non-crop habitats as refuges or breeding sites in the desert agroecosystem of the northern Negev, Israel? We investigated the use of natural desert habitat, planted trees (Eucalyptus), and a summer crop (sunflowers) by winter-wheat inhabiting spiders. We collected spiders using pitfall traps and a suction device from wheat fields and adjacent to non-wheat habitats during the wheat season and between seasons. We found that two crop specialist species, Trichoncoides piscator (Simon, 1884) (Linyphiidae) and Thanatus vulgaris Simon, 1870 (Philodromidae), switched to an alternative crop during the inter-wheat season. Habitat generalist species, such as Nomisia sp. (Gnaphosidae), Enoplognatha spp. (Theridiidae) and Alioranus pastoralis (O. Pickard-Cambridge, 1872) (Linyphiidae) used alternative non-crop habitats as refuges and breeding sites to differing degrees in both seasons. While all habitat generalist species used the desert habitat, none used planted trees exclusively as an alternative habitat. We conclude that crop-inhabiting, desert species may be unable to colonize the wheat fields if nearby desert habitat is supplanted by other crops or by tree plantations.

Note:
Related Files :
breeding site
colonization
desert ecosystem
insects
Negev
planted trees
refuge
Spiders
עכבישים
עוד תגיות
תוכן קשור
More details
DOI :
https://doi.org/10.1636/JoA-S-16-008.1
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
44897
Last updated date:
02/03/2022 17:27
Creation date:
11/11/2019 08:01
Scientific Publication
Use of alternative habitats by spiders in a desert agroecosystem
45

Itai Opatovsky - Regional Agricultural Research and Development Center, Southern Branch (Besor) 85400, Israel and Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel; 
Iris Musli and Yael Lubin - Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel

Use of alternative habitats by spiders in a desert agroecosystem

Annual crop fields are short-lived and disturbed environments. Therefore, sustainable populations of natural enemies in these fields must be maintained by repeated colonization each season from habitats outside the crop fields. In desert agroecosystems, unmanaged habitats differ greatly in abiotic and biotic conditions from croplands, creating potentially significant barriers to movement of predators. We asked here: to what extent do predators use non-crop habitats as refuges or breeding sites in the desert agroecosystem of the northern Negev, Israel? We investigated the use of natural desert habitat, planted trees (Eucalyptus), and a summer crop (sunflowers) by winter-wheat inhabiting spiders. We collected spiders using pitfall traps and a suction device from wheat fields and adjacent to non-wheat habitats during the wheat season and between seasons. We found that two crop specialist species, Trichoncoides piscator (Simon, 1884) (Linyphiidae) and Thanatus vulgaris Simon, 1870 (Philodromidae), switched to an alternative crop during the inter-wheat season. Habitat generalist species, such as Nomisia sp. (Gnaphosidae), Enoplognatha spp. (Theridiidae) and Alioranus pastoralis (O. Pickard-Cambridge, 1872) (Linyphiidae) used alternative non-crop habitats as refuges and breeding sites to differing degrees in both seasons. While all habitat generalist species used the desert habitat, none used planted trees exclusively as an alternative habitat. We conclude that crop-inhabiting, desert species may be unable to colonize the wheat fields if nearby desert habitat is supplanted by other crops or by tree plantations.

Scientific Publication
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