DOI: 10.1016/j.foreco.2016.03.010
Scopus记录号: 2-s2.0-84959926249
论文题名: Determinants of functional connectivity of holm oak woodlands: Fragment size and mouse foraging behavior
作者: Morán-López T. ; Robledo-Arnuncio J.J. ; Díaz M. ; Morales J.M. ; Lázaro-Nogal A. ; Lorenzo Z. ; Valladares F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 368 起始页码: 111
结束页码: 122
语种: 英语
英文关键词: Forest fragmentation
; Mating network
; Pollen dispersal
; Quercus ilex
; Seed dispersal
Scopus关键词: Forestry
; Genes
; Mammals
; Conservation strategies
; Forest fragmentations
; Functional connectivity
; Landscape connectivities
; Long-distance dispersals
; Pollen dispersal
; Quercus ilex
; Seed dispersal
; Plants (botany)
; evergreen tree
; foraging behavior
; gene expression
; gene flow
; genetic variation
; immigration
; landscape ecology
; pollen
; pollination
; rodent
; seed dispersal
; source-sink dynamics
; woodland
; Quercus ilex
英文摘要: Demographic and genetic connectivity of fragmented plant populations will depend on effective propagule flow across the landscape. We analyze functional connectivity in a holm oak (Quercus ilex) fragmented landscape by considering three important stages driving recruitment: effective pollination, acorn production and acorn dispersal. We used a network approach to (1) determine if pollen-mediated gene exchange across the landscape was spatially structured; (2) estimate the effects of limited acorn dispersal on functional connectivity; (3) identify which landscape traits could drive source-sink dynamics of gene flow. Although long distance dispersal was relatively frequent, most effective pollen flow occurred over short distances (<100 m). This resulted in a significantly modular structure of the mating network, yielding higher gene flow among nearby fragments. Limited mouse acorn hoarding activity had a strong impact on landscape connectivity, decreasing male gametic immigration rates into forest patches by one order of magnitude Besides, our results show that big forest fragments (>10 ha) are the main pollen sources, while small ones (<1 ha) are important pollen sinks. Thus, big fragments are critical to maintain functional connectivity, while small forest fragments may provide acorn crops better representing regional genetic diversity. In addition to area effects, less isolated and more central fragments showed higher migration rates and exchanged effective pollen with more fragments. Hence, we expected that landscapes with uniform or clumped distribution of big forest fragments would show optimal connectivity traits. However, despite that simulated gene flow was more evenly distributed across the landscape, connectance and migration rates decreased. Our results call for caution before translating patch-level management guidelines to the landscape scale. They also show that the level of functional connectivity may change throughout the recruitment process, suggesting that large-scale conservation strategies may fail if local effective seed establishment is disregarded. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64973
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biogeography and Global Change (BCG-MNCN), Museo Nacional de Ciencias Naturales, CSIC, c/Serrano 115 bis, Madrid, Spain; Department of Forest Ecology and Genetics, INIA-CIFOR, Ctra. de la Coruña km 7.5, Madrid, Spain; Ecotono laboratory, INIBIOMA-CONICET, National University of Comahue, Quintral 1250, Bariloche, Río Negro, Argentina
Recommended Citation:
Morán-López T.,Robledo-Arnuncio J.J.,Díaz M.,et al. Determinants of functional connectivity of holm oak woodlands: Fragment size and mouse foraging behavior[J]. Forest Ecology and Management,2016-01-01,368