The scale of effect of landscape context varies with the species’ response variable measured View Full Text


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Article Info

DATE

2019-04-01

AUTHORS

Andrew D. Moraga, Amanda E. Martin, Lenore Fahrig

ABSTRACT

To detect an effect of landscape context on a species’ response, the landscape variables need to be measured within the appropriate distance from the species’ response, i.e. at the scale of effect. However, it is not clear what factors determine the scale of effect. Our objective was to test the prediction that the scale of effect should be smallest when the species’ response is fecundity, larger for abundance, and larger still for occurrence. We compared the scale of effect of two landscape variables (road density, forest proportion) on the three responses (fecundity, abundance, occurrence) for the wood frog (Lithobates sylvaticus) in eastern Ontario, Canada. We used egg mass surveys of 34 ponds to estimate fecundity (mean eggs/mass), abundance (number of masses), and occurrence (presence/absence of egg masses). We then empirically estimated the scale of effect of each landscape variable on each response. The scale of effect differed among responses, from 0.2 to 3.0 km radii; however, it did not vary in the predicted order. Furthermore, the order was not consistent between the two landscape variables. Our results show that the scale of effect of a landscape variable on a given species can differ for different response variables. However, they also suggest that these differences in the scale of effect are not predictable. Thus, the most reliable way to ensure a landscape context study is conducted at the correct spatial extent is to estimate the scale of effect empirically, rather than ‘guesstimating’ the extent a priori. More... »

PAGES

1-13

References to SciGraph publications

  • 2016-08. What determines the spatial extent of landscape effects on species? in LANDSCAPE ECOLOGY
  • 2016-08. Different Anuran Species Show Different Relationships to Agricultural Intensity in WETLANDS
  • 2018-03. The Spatial Scale of a Species’ Response to the Landscape Context Depends on which Biological Response You Measure in CURRENT LANDSCAPE ECOLOGY REPORTS
  • 2014-03. Similar effects of residential and non-residential vegetation on bird diversity in suburban neighbourhoods in URBAN ECOSYSTEMS
  • 2011-01. The influence of landscape, patch, and within-patch factors on species presence and abundance: a review of focal patch studies in LANDSCAPE ECOLOGY
  • 2005-06. Fecundity determines the extinction threshold in a Canadian assemblage of longhorned beetles (Coleoptera: Cerambycidae) in JOURNAL OF INSECT CONSERVATION
  • 2005-06. Double-observer approach to estimating egg mass abundance of pool-breeding amphibians in WETLANDS ECOLOGY AND MANAGEMENT
  • 2007-10. Density dependence in the terrestrial life history stage of two anurans in OECOLOGIA
  • 2011-07. Positive effects of forest fragmentation, independent of forest amount, on bat abundance in eastern Ontario, Canada in LANDSCAPE ECOLOGY
  • 2012-08. What size is a biologically relevant landscape? in LANDSCAPE ECOLOGY
  • 1995-06. Impacts of hydroperiod on growth and survival of larval amphibians in temporary ponds of Central Pennsylvania, USA in OECOLOGIA
  • 2011-05. Comparative influence of isolation, landscape, and wetland characteristics on egg-mass abundance of two pool-breeding amphibian species in LANDSCAPE ECOLOGY
  • Journal

    TITLE

    Landscape Ecology

    ISSUE

    N/A

    VOLUME

    N/A

    Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/s10980-019-00808-9

    DOI

    http://dx.doi.org/10.1007/s10980-019-00808-9

    DIMENSIONS

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