Sinks, sources, and spotted owls: A territorial population model with continuous mortality and discrete birth

Carroll, Joseph E.; Lamberson, Roland H.; Roe, Stephen

doi:10.1016/0025-5564(94)00059-9

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…Persistence is particularly influenced by seasonality and disturbances (Allen et al 1993 ;Grenfell et al 1995). Moreover, ecological disturbances are an inherent property of many plant, microbe and invertebrate populations, but this feature has received little attention (Barlow 1993 ;Hanski et al 1993 ;Shaw 1994 ;Carroll et al 1995). Most ecological and epidemiological models describe systems with continuous, uninterrupted interactions between populations (Murray 1989).…”

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A test of heterogeneous mixing as a mechanism for ecological persistence in a disturbed environment

Gubbins

Gilligan

1997

Proc. R. Soc. Lond. B

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Persistence is a central issue in population ecology with important implications for population management. Most theoretical studies have focused on continually interacting populations, even though many systems are subject to ecological disturbances which confound analysis of persistence. In this paper, we use a combination of a simple parasite-hyperparasite model with disturbances and field data to investigate the factors contributing to the observed persistence of the parasite population. The field data are taken from a two-year experiment (including five growing seasons) investigating the use of the mycoparasite Sporidesmium scleroti orum as a persistent biological control agent of Sclerotinia minor, an economically important fungal parasite of lettuce. We show that the standard assumption of homogeneous mixing fails to predict the observed persistence of the parasite population. We demonstrate that allowing for heterogeneous mixing prevents the fade-out predicted in the homogeneous mixing case. The implications of the results for broad classes of host-parasite systems are discussed.

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confidence: 99%

A test of heterogeneous mixing as a mechanism for ecological persistence in a disturbed environment

Gubbins

Gilligan

1997

Proc. R. Soc. Lond. B

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“…The dynamics of sources and sinks has been studied extensively (Pulliam [1988], Pulliam and Danielson [1991], Howe et al [1991], Davis and Howe [1992], Carroll et al [1995], Doak [1995], Watkinson and Sutherland [1995], Pulliam [1996]). In modeling such systems, it has generally been assumed that there are just two types of habitat, good and poor, and that the species involved will choose richer habitats over poorer if the former type is available.…”

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confidence: 99%