caa a22 4500 469096977 CHVBK 20180323133033.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF00317164 doi (NATIONALLICENCE)springer-10.1007/BF00317164 Food limitation and seasonal population declines of rotifers [Elektronische Daten] [María González, Thomas Frost] Summary: Keratella cochlearis exhibited consistent seasonal abundance patterns during a four-year study in Little Rock Lake, Wisconsin, U.S.A. In each year, spring population peaks were followed by strong summer reductions. Concomitant with population declines, there were reductions in rotifer egg ratios. Keratella taurocephala abundance patterns were similar to those of K. cochlearis during 1984 and 1985, but not in 1986 and 1987, when spring peaks and summer declines were not apparent. However, summer declines in the egg ratio of K. taurocephala were observed during each year. The reduction in rotifer populations simultaneously with decreased egg ratios suggested that population declines were caused by food limitation. Food-addition experiments conducted in situ in small enclosures indicated that food was limiting for K. cochlearis when its populations were declining, but not during other periods of the year. Keratella taurocephala did not show a consistent response to food addition. Springer-Verlag, 1992 Rotifers nationallicence Keratella cochlearis nationallicence Keratella taurocephala nationallicence Food limitation nationallicence Population declines nationallicence González María Center for Limnology, University of Wisconsin, 53706, Madison, WI, USA aut Frost Thomas Center for Limnology, University of Wisconsin, 53706, Madison, WI, USA aut Oecologia Springer-Verlag 89/4(1992-04-01), 560-566 0029-8549 89:4<560 1992 89 442 https://doi.org/10.1007/BF00317164 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317164 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- González María Center for Limnology, University of Wisconsin, 53706, Madison, WI, USA aut NATIONALLICENCE 700 1- Frost Thomas Center for Limnology, University of Wisconsin, 53706, Madison, WI, USA aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 89/4(1992-04-01), 560-566 0029-8549 89:4<560 1992 89 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer