NDLI: Recent fire history and connectivity patterns determine bird species distribution dynamics in landscapes dominated by land abandonment

Content Provider	Springer Nature Link
Author	Zozaya, Elena L. Brotons, Lluís Saura, Santiago
Copyright Year	2011
Abstract	Mediterranean landscapes are suffering two opposing forces leading to large-scale changes in species distribution: land abandonment of less productive areas and an increase in wildfire impact. Here, we test the hypothesis that fires occurred in recent decades drive the pattern of expansion of early-successional, open-habitat bird species by aiding in the process of colonisation of newly burnt areas. The study was carried out in Catalonia (NE Spain). We selected 44 burnt sites occurring between 2000 and 2005 to model colonisation patterns under different assumptions of potential colonisers’ sources and evaluated the colonisation estimates with empirical data on six bird species especially collected for this purpose. We first defined three landscape scenarios serving as surrogates of potential colonisers’ sources: open-habitats created by fire, shrublands and farmlands. Then, we used a parameter derived from a functional connectivity metric to estimate species colonization dynamics on the selected sites by each particular scenario. Finally, we evaluated our colonisation estimates with the species occurrence in the studied locations by using generalized linear mixed models. The occurrence of the focal species on the newly burnt sites was significantly related to the connectivity patterns described by both the recent fire history and the other open-habitat types generated by a different type of disturbance. We suggest that land use changes in recent decades have produced a shift in the relative importance of habitats acting as reservoirs for open-habitat bird species dynamics in Mediterranean areas. Before the middle of the twentieth century species’ reservoirs were probably constituted by relatively static open habitats (grassland and farmland), whereas afterwards they likely consist of a shifting mosaic of habitat patches where fire plays a key role as connectivity provider and largely contributes to the maintenance of species persistence.
Starting Page	171
Ending Page	184
Page Count	14
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	27
Issue Number	2
e-ISSN	15729761
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-12-24
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Colonisation dynamics Connectivity Fire history Habitat configuration Land-use changes Land abandonment Open-habitat bird species Potential dispersal flux Forestry Ecology Plant Ecology Plant Sciences Forestry Management Landscape Ecology
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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