Environmental autocorrelation: curse or blessing?

Schiegg, Karin

doi:10.1016/s0169-5347(03)00074-0

Cited by 22 publications

(27 citation statements)

References 21 publications

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“…When taken in conjunction with the theoretical work of Roy et al (2005), our experimental results have broad implications for our understanding of species persistence in heterogeneous and deteriorating landscapes (Schiegg 2003). For example, these findings suggest that weak sink populations found at the edge of a species' range should show highly variable ''outbreak'' dynamics (Mehlman 1997).…”

Section: Discussionmentioning

confidence: 63%

The Inflationary Effects of Environmental Fluctuations Ensure the Persistence of Sink Metapopulations

Matthews¹,

Gonzalez

2007

Ecology

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Under current rates of environmental change many populations may be found in habitats of low quality and low conservation value, creating population sinks. We test recent theory that suggests, surprisingly, that stochastic environmental variability may enhance the long-term persistence of sink metapopulations. Using experimental populations of Paramecium aurelia we show that it is possible for a metapopulation comprised entirely of sink populations to persist for many generations in a random environment. In accordance with the theory, we show that positive temporal autocorrelation and low spatial correlation in the environment can ensure the long-term persistence and enhance the mean and maximum abundance of sink metapopulations. High levels of spatial correlation in the environment created strong population synchrony and limited the persistence time of the sink metapopulations. These results have important implications for the development of a theory underlying the synergistic effects of habitat fragmentation and environmental change on population persistence.

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Section: Discussionmentioning

confidence: 63%

The Inflationary Effects of Environmental Fluctuations Ensure the Persistence of Sink Metapopulations

Matthews¹,

Gonzalez

2007

Ecology

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“…2003). Tem‐poral autocorrelation has typically been viewed as an anathema to population persistence in patchy, variable environments (Schiegg 2003); however, as I show below temporal correlation coupled with the appropriate behavioural responses of organisms enhances population persistence.…”

Section: Introductionmentioning

confidence: 87%

Site fidelity in temporally correlated environments enhances population persistence

2004

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Site fidelity, the phenomenon of remaining faithful to sites, often where an individual has bred successfully in the past, has important consequences for population dynamics. Previous results have shown that site fidelity results in a positive correlation between population density and fitness. Here, I build on this theme by incorporating site fidelity using the win-stay : lose-switch rule often seen among birds, i.e. individuals return to sites were they bred successfully in the past and vacate those where they have not. Results demonstrate that the combination of site fidelity and temporal autocorrelation in site quality can enhance the persistence of population networks, whereas either factor acting alone has little or no influence. Moreover, there is an abrupt threshold at moderate levels of temporal autocorrelation, q time > 0.35-0.4, beyond which persistence time and the probability of surviving >500 years is greatly accelerated. These results suggest that temporal autocorrelation combined with appropriate behavioural responses may enhance population persistence.

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“…the spatial autocorrelation issue (Dale et al 1991;Jongman et al 1997;Schiegg 2003). In order for two relevés not to be overly influenced by each other's seeds and clonal plants, 100 m was taken as the minimum distance between two relevés during the field research, with that distance being much greater in the majority of cases.…”

Section: Methodsmentioning

confidence: 99%

Classification of mesic and wet grasslands in northwest Croatia

Stančić¹

2008

Biologia

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In this paper, 450 relevés of grassland vegetation of the Molinio-Arrhenatheretea class in northwest Croatia have been classified using the agglomerative Ward's Method in the PC-ORD program. In the process of classification, the following seven groups were obtained: 1. Bromus erectus-Arrhenatherum elatius, 2. Arrhenatherum elatius, 3. Crepis biennisArrhenatherum elatius, 4. Luzula campestris-Holcus lanatus, 5. Deschampsia cespitosa-Betonica officinalis, 6. Equisetum palustre, 7. Oenanthe silaifolia-Alopecurus pratensis. The results of the classification for the most part correspond to the traditional syntaxonomic system. The plant communities with the largest number of relevés in the data set are the association Arrhenatheretum elatioris "typicum" (group 2) and the association Holcetum lanati (group 4). They represent the most anthropogenically influenced grasslands of the study area. In the analysis of the ecological factors by PCA in the CANOCO program it is established that separation of the relevés is influenced most greatly by moisture, followed by humus, temperature, light and soil reaction. From the standpoint of nature conservation, the wet meadows of the Molinietalia order are the most valuable, because of the notable diversity of species and communities, as well as a considerable number of threatened plant species.

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Environmental autocorrelation: curse or blessing?

Cited by 22 publications

References 21 publications

The Inflationary Effects of Environmental Fluctuations Ensure the Persistence of Sink Metapopulations

The Inflationary Effects of Environmental Fluctuations Ensure the Persistence of Sink Metapopulations

Site fidelity in temporally correlated environments enhances population persistence

Classification of mesic and wet grasslands in northwest Croatia

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