caa a22 4500 469097795 CHVBK 20180323133036.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00650332 doi (NATIONALLICENCE)springer-10.1007/BF00650332 Díaz Mario Departmento de Biología Animal I (Vertebrados), Facultad de Biología, Universidad Compultense, 28040, Madrid, Spain aut Spatial and temporal patterns of granivorous ant seed predation in patchy cereal crop areas of central Spain [Elektronische Daten] [Mario Díaz] Summary: Patterns of granivorous ant seed predation in extensive cereal croplands of central Spain were investigated by measuring seed removal rates on artificial seed patches. Sampling was designed to cope with the seasonal and daily foraging cycle of ant colonies. Simultaneously with removal rates, I measured seed availability, habitat physiognomy at two spatial scales (landscape and microhabitat), weather variables (temperature and rainfall), and distance to the nearest ant nest. Ant seed predation was concentrated on shrublands, and associated with places with high covers of shrubs, chamaephytes and stones. These results were in close agreement with those obtained by analyzing the spatial distribution of granivorous ant nests (Díaz 1991). Moreover, there was a close relationship between seed removal rates and distance to the nearest ant nest, that fitted the predictions of the optimal foraging model developed by Reyes-López (1987). Seasonal and daily patterns of ant foraging activity seemed to depend more on endogenous factors than on environmental variation. I conclude that ants were not able to track the spatial and temporal variation of their food resources in these man-modified habitats, so that their potential to interact with other members of the granivore system is greatly reduced by human activities. Springer-Verlag, 1992 Seed predation patterns nationallicence Messor capitatus nationallicence Cereal croplands nationallicence Environmental factors nationallicence Life history constraints nationallicence Oecologia Springer-Verlag 91/4(1992-10-01), 561-568 0029-8549 91:4<561 1992 91 442 https://doi.org/10.1007/BF00650332 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00650332 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Díaz Mario Departmento de Biología Animal I (Vertebrados), Facultad de Biología, Universidad Compultense, 28040, Madrid, Spain aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 91/4(1992-10-01), 561-568 0029-8549 91:4<561 1992 91 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer