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Semi-natural grasslands as population sources for pollinating insects in agricultural landscapes |
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| Authors: | ERIK Ö CKINGER, HENRIK G. SMITH |
| Affiliation: | Department of Ecology, Animal Ecology, Lund University, SE-223 62 Lund, Sweden |
| Abstract: | |
| Keywords: | abundance bumble bees butterflies diversity farmland field margins isolation species richness |