Affiliation: | 1. Universita¨t Kiel, Zoologisches Institut, LS fu¨r O¨kologie, Olshausenstr. 40, 24098 Kiel, Germany Current address: Center for Environmental Research Leipzig—Halle Ltd., Department of Community Ecology, Theodor Lieser Str. 4, D-06120 Halle/Saale, Germany (tel. +49 / 345 5585 315;2. fax +49 / 345 5585 329;3. e-mail: prin@oesa.ufz.de). |