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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Ecological Society of America is collaborating with JSTOR to digitize, preserve and extend access to Ecology.Abstract. A metapopulation model of the greater glider (Petauroides volans), an Australian forest-dependent, arboreal marsupial, was developed that accounted for changes in habitat quality of patches in response to fire. Spatial correlation in the incidence of fire was incorporated in the model, with correlations within and among habitat patches. The correlation in the incidence of fire declined with the distance between points in the landscape. The spatially correlated disturbance regime allowed the model to simulate partial burning of patches, with the chance of partial burning depending on the size of patches. Including spatial correlation in the model tended to increase risks of extinction by incorporating correlation between patches but also decreased risks by incorporating imperfect correlation within patches. The model was used to investigate the design of nature reserves that are exposed to disturbance by fire in mountain ash (Eucalyptus regnans) forests of southeastern Australia. We used a number of scenarios to investigate the influence of the spatial configuration of reserves (size, number, and location of patches) on the risk of extinction of greater gliders. The model indicated that large, contiguous areas of old-growth forest were important for the persistence of greater gliders. However, in timber production forests in the Central Highlands region of Victoria, old-growth forest is rare and fragmented. Within a typical timber management area of -6700 ha, the predicted risk of extinction for greater gliders within 300 yr in the reserved old-growth remnants was 0.44. To reduce the risk of extinction below 0.10, an additional 650 ha of regrowth forest should be reserved from timber harvesting, with these areas concentrated around the largest old-growth patches. The results of our study highlight the importance of considering disturbance regimes (particularly aspects of spatial correlation) in reserve design and metapopulation dynamics. population dynamics (Hastings and Wolin 1989). Correlation between the population dynamics in patches has rarely been considered (Harrison and Quinn 1989, Gilpin 1990). For example, Lindenmayer and Possingham (1995) considered correlated disturbance events, which ultimately drove the simulated dynamics of a metapopulation of Leadbeater's possum (Gymnobelideus leadbeateri) in the forests of southeasternAustralia. However, they did not consider spatial correlation in the disturbance process, with the implicit assumptions that all patches were uniformly affected by disturbance, and that the correlation between the incidence of distur...

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No abstract

How can finance be durably democratized? In the centers of financial power in both the United States and the United Kingdom, proposals now circulate to give workers and the public more say over how flows of credit are allocated. This article examines five democratization proposals: credit union franchises, public investment banks, sovereign wealth funds, inclusive ownership funds, and bank nationalization. It considers how these plans might activate worker and public engagement in decision making about finance by focusing on three modes of public participation: representative democracy, direct democracy, and deliberative minipublics. It then considers the degree to which democratization plans might be resilient to de-democratization threats from business. It argues that of the five, bank nationalization goes furthest in guarding against de-democratization threats but is still pocked with pitfalls if it relies solely on representative democracy. It argues that two criteria appear necessary for democratically durable alternatives: the active direct participation of workers and citizens and the weakening of businesses’ capacity for democratic retrenchment.