caa a22 4500 477067603 CHVBK 20180405111417.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF02459489 doi (NATIONALLICENCE)springer-10.1007/BF02459489 Abrupt population changes along smooth environmental gradients [Elektronische Daten] [William Wilson, Roger Nisbet, Alex Ross, Carlos Robles, Robert Desharnais] Populations often exhibit abrupt changes in abundance associated with a smooth, continuous change in some component of their environment, with the abruptness usually attributed to inter-specific interactions or physical extremes. This paper presents a spatially explicit single-species population model in which intra-specific interactions alone are responsible for such an abrupt change. The essential mechanism involves cooperation in both colonization (through enhanced recruitment near other individuals) and mortality (protection through a "safety-in-numbers” interaction). Large fluctuations in population density would likely be observable near the transition region. Society for Mathematical Biology, 1996 Wilson William Department of Ecology, Evolution, and Marine Biology, University of California at Santa Barbara, 93106, Santa Barbara, CA, U.S.A. aut Nisbet Roger Department of Ecology, Evolution, and Marine Biology, University of California at Santa Barbara, 93106, Santa Barbara, CA, U.S.A. aut Ross Alex Marine Division, National Institute of Water and Atmospheric Research, P.O. Box 8602, Christchurch, New Zealand aut Robles Carlos Department of Biology, California State University at Los Angeles, 90032, Los Angeles, CA, U.S.A. aut Desharnais Robert Department of Biology, California State University at Los Angeles, 90032, Los Angeles, CA, U.S.A. aut Bulletin of Mathematical Biology Kluwer Academic Publishers 58/5(1996-09-01), 907-922 0092-8240 58:5<907 1996 58 11538 https://doi.org/10.1007/BF02459489 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02459489 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wilson William Department of Ecology, Evolution, and Marine Biology, University of California at Santa Barbara, 93106, Santa Barbara, CA, U.S.A aut NATIONALLICENCE 700 1- Nisbet Roger Department of Ecology, Evolution, and Marine Biology, University of California at Santa Barbara, 93106, Santa Barbara, CA, U.S.A aut NATIONALLICENCE 700 1- Ross Alex Marine Division, National Institute of Water and Atmospheric Research, P.O. Box 8602, Christchurch, New Zealand aut NATIONALLICENCE 700 1- Robles Carlos Department of Biology, California State University at Los Angeles, 90032, Los Angeles, CA, U.S.A aut NATIONALLICENCE 700 1- Desharnais Robert Department of Biology, California State University at Los Angeles, 90032, Los Angeles, CA, U.S.A aut NATIONALLICENCE 773 0- Bulletin of Mathematical Biology Kluwer Academic Publishers 58/5(1996-09-01), 907-922 0092-8240 58:5<907 1996 58 11538 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer