SevernsMcIntireSchultz2013

Reference

Severns, P.M., McIntire, E.J.B. and Schultz, C.B. (2013) Evaluating functional connectivity with matrix behavior uncertainty for an endangered butterfly. Landscape Ecology, 28(3):559-569. (URL )

Abstract

Understanding animal responses to landscape elements helps forecast population reactions to changing landscape conditions. The challenge is that some behaviors are poorly known and difficult to estimate. We assessed how uncertainty in behavioral responses to dense woods, an avoided landscape structure, impacts functional connectivity among reproductive habitat patches for Fender’s blue butterfly, an endangered prairie species of western Oregon, {USA.} We designed a factorial simulation experiment using a spatially explicit individual-based model to project functional connectivity for female butterflies across current and alternative landscapes. We varied the probability of dense woods entry and turning angle standard deviation for movements within the dense woods over a range of biologically reasonable and observed values. Butterflies in the current landscape (46 % dense woods) and one with prairie encroached by forest (60 % dense woods) showed reductions in functional connectivity estimates consistent with the expectations of habitat fragmentation. Although dense woods entrance uncertainty impacted functional connectivity projections, uncertainty in the dense woods turning angle standard deviation had comparatively little impact on connectivity estimates. Reduction and reconfiguration of the current dense woods to 27 % cover (restored landscape) appeared to facilitate a corridor behavior in dispersing individuals, likely providing a functional connectivity estimate comparable to the historic landscape ({\textless}5 % dense woods). Our simulations suggest that additional study of butterfly movement within the dense woods is unnecessary and that a partial reduction in dense woods would be sufficient to achieve historic levels of functional connectivity for Fender’s blue across the study landscape.

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@ARTICLE { SevernsMcIntireSchultz2013,
    TITLE = { Evaluating functional connectivity with matrix behavior uncertainty for an endangered butterfly },
    VOLUME = { 28 },
    ISSN = { 0921-2973, 1572-9761 },
    LCCN = { 0000 },
    URL = { http://link.springer.com/article/10.1007/s10980-013-9860-6 },
    DOI = { 10.1007/s10980-013-9860-6 },
    ABSTRACT = { Understanding animal responses to landscape elements helps forecast population reactions to changing landscape conditions. The challenge is that some behaviors are poorly known and difficult to estimate. We assessed how uncertainty in behavioral responses to dense woods, an avoided landscape structure, impacts functional connectivity among reproductive habitat patches for Fender’s blue butterfly, an endangered prairie species of western Oregon, {USA.} We designed a factorial simulation experiment using a spatially explicit individual-based model to project functional connectivity for female butterflies across current and alternative landscapes. We varied the probability of dense woods entry and turning angle standard deviation for movements within the dense woods over a range of biologically reasonable and observed values. Butterflies in the current landscape (46 % dense woods) and one with prairie encroached by forest (60 % dense woods) showed reductions in functional connectivity estimates consistent with the expectations of habitat fragmentation. Although dense woods entrance uncertainty impacted functional connectivity projections, uncertainty in the dense woods turning angle standard deviation had comparatively little impact on connectivity estimates. Reduction and reconfiguration of the current dense woods to 27 % cover (restored landscape) appeared to facilitate a corridor behavior in dispersing individuals, likely providing a functional connectivity estimate comparable to the historic landscape ({\textless}5 % dense woods). Our simulations suggest that additional study of butterfly movement within the dense woods is unnecessary and that a partial reduction in dense woods would be sufficient to achieve historic levels of functional connectivity for Fender’s blue across the study landscape. },
    LANGUAGE = { en },
    NUMBER = { 3 },
    URLDATE = { 2013-03-27 },
    JOURNAL = { Landscape Ecology },
    AUTHOR = { Severns, P.M. and McIntire, E.J.B. and Schultz, C.B. },
    MONTH = { mar },
    YEAR = { 2013 },
    KEYWORDS = { Biased correlated random walk, Ecology, Forestry, Forestry Management, Functional connectivity, Habitat fragmentation, Habitat restoration, Landscape Ecology, Matrix configuration, Plant Ecology, Plant Sciences, {SEIBM} },
    PAGES = { 559--569 },
}

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