Evaluating realized seed dispersal across fragmented tropical landscapes : a two-fold approach using parentage analysis and the neighbourhood model

© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 214(2017), 3 vom: 12. Mai, Seite 1307-1316
1. Verfasser: Ismail, Sascha A (VerfasserIn)
Weitere Verfasser: Ghazoul, Jaboury, Ravikanth, Gudasalamani, Kushalappa, Cheppudira G, Uma Shaanker, Ramanan, Kettle, Chris J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Dysoxylum malabaricum Ocyceros griseus (Malabar grey hornbill) Western Ghats fragmentation realized seed dispersal recolonization recruitment spatial isolation
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520 |a Despite the importance of seed dispersal for survival of plant species in fragmented landscapes, data on seed dispersal at landscape scales remain sparse. Effective seed dispersal among fragments determines recolonization and plant species persistence in such landscapes. We present the first large-scale (216-km2 ) direct estimates of realized seed dispersal of a high-value timber tree (Dysoxylum malabaricum) across an agro-forest landscape in the Western Ghats, India. Based upon an exhaustive inventory of adult trees and a sample of 488 seedlings all genotyped at 10 microsatellite loci, we estimated realized seed dispersal using parentage analysis and the neighbourhood model. Our estimates found that most realized seed dispersal was within 200 m, which is insufficient to effectively bridge the distances between forest patches. We conclude that using mobility of putative animal dispersers can be misleading when estimating tropical tree species vulnerability to habitat fragmentation. This raises serious concerns about the potential of many tropical trees to recolonize isolated forest patches where high-value tree species have already been removed 
650 4 |a Journal Article 
650 4 |a Dysoxylum malabaricum 
650 4 |a Ocyceros griseus (Malabar grey hornbill) 
650 4 |a Western Ghats 
650 4 |a fragmentation 
650 4 |a realized seed dispersal 
650 4 |a recolonization 
650 4 |a recruitment 
650 4 |a spatial isolation 
700 1 |a Ghazoul, Jaboury  |e verfasserin  |4 aut 
700 1 |a Ravikanth, Gudasalamani  |e verfasserin  |4 aut 
700 1 |a Kushalappa, Cheppudira G  |e verfasserin  |4 aut 
700 1 |a Uma Shaanker, Ramanan  |e verfasserin  |4 aut 
700 1 |a Kettle, Chris J  |e verfasserin  |4 aut 
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