caa a22 4500 388093218 CHVBK 20180307125257.0 cr unu---uuuuu 161130e199910 xx s 000 0 eng 10.4039/Ent131645-5 doi S0008347X00010257 pii (NATIONALLICENCE)cambridge-10.4039/Ent131645-5 Banks John E. Department of Zoology, Box 351800, University of Washington, Seattle, Washington, USA 98195-1800 DIFFERENTIAL RESPONSE OF TWO AGROECOSYSTEM PREDATORS, PTEROSTICHUS MELANARIUS (COLEOPTERA: CARABIDAE) AND COCCINELLA SEPTEMPUNCTATA (COLEOPTERA: COCCINELLIDAE), TO HABITAT-COMPOSITION AND FRAGMENTATION-SCALE MANIPULATIONS [Elektronische Daten] [John E. Banks] Using alternating patches of weeds and crop [broccoli, Brassica oleracea (L.) (Brassicaceae)], vegetation composition and the spatial scale at which the vegetation was fragmented were manipulated in a factorial design field experiment. The effects of these manipulations were different for two common agroecosystem predators sampled. Sevenspotted lady beetles, Coccinella septempunctata (L.), were unaffected by vegetation-composition treatments but responded strongly to fragmentation-scale manipulations. The beetle Pterostichus melanarius (Illiger) was unaffected by both fragmentation-scale and vegetation-composition manipulations. These findings highlight the challenge of developing a predictive theory of the effects of vegetation diversification on assemblages of predators in agroecosystems. Copyright © Entomological Society of Canada 1999 The Canadian Entomologist Cambridge University Press 131/5(1999-10), 645-657 0008-347X 131:5<645 1999 131 TCE https://doi.org/10.4039/Ent131645-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent131645-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Banks John E. Department of Zoology, Box 351800, University of Washington, Seattle, Washington, USA 98195-1800 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 131/5(1999-10), 645-657 0008-347X 131:5<645 1999 131 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge