globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2017.01.018
Scopus记录号: 2-s2.0-85010638144
论文题名:
Gene flow interruption in a recently human-modified landscape: The value of isolated trees for the maintenance of genetic diversity in a Mexican endemic red oak
作者: Oyama K.; Herrera-Arroyo M.L.; Rocha-Ramírez V.; Benítez-Malvido J.; Ruiz-Sánchez E.; González-Rodríguez A.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2017
卷: 390
起始页码: 27
结束页码: 35
语种: 英语
英文关键词: Forest fragmentation ; Gene flow ; Genetic diversity ; Isolated trees ; Outcrossing rates ; Quercus castanea
Scopus关键词: Biodiversity ; Genes ; Land use ; Forest fragmentations ; Gene flows ; Genetic diversity ; Isolated trees ; Outcrossing rate ; Quercus ; Forestry ; anthropogenic effect ; biodiversity ; connectivity ; conservation genetics ; deciduous tree ; endemic species ; forest ecosystem ; gene flow ; genetic differentiation ; genetic marker ; landscape change ; pollen ; Mexico [North America] ; Quercus castanea ; Quercus rubra
英文摘要: Gene flow within and among populations is an important factor to maintain genetic cohesiveness and diversity across landscapes. Nowadays, human land use has led to a large forest conversion, creating many fragmented areas where remnant trees play an important role in conserving biodiversity. In this study, we analyzed the effects of a recent anthropogenic forest fragmentation on the genetic diversity and genetic heterogeneity of pollen pools accepted by individuals of the red oak Quercus castanea growing in forest patches and as isolated trees in central Mexico. Pollen movement was also evaluated by the analysis of outcrossing rates using seven nuclear microsatellites. We assumed that adult trees are remnants of the populations that existed previous to the forest fragmentation, while progenies of these trees are the result of recent reproductive events occurring after the fragmentation. We found high genetic diversity in both adult trees and progenies, even though progenies of isolated trees showed a significant reduction in heterozygosity as compared to their mother trees. However, the results of TWOGENER and mating system analyses indicated similar numbers of pollen donors in the progenies of mother trees from fragments and in isolated trees. Overall, our results suggest that gene flow is still extensive among forest fragments and isolated trees, conferring them a great value for the conservation of genetic diversity and connectivity. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64443
Appears in Collections:影响、适应和脆弱性

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作者单位: Escuela Nacional de Estudios Superiores Unidad Morelia (UNAM), Antigua Carretera a Pátzcuaro 8701, Col. Ex Hacienda de San José de la Huerta, Morelia, Michoacán, Mexico; Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México (UNAM), Antigua carretera a Pátzcuaro no. 8701, Col. Ex-hacienda San José de la Huerta, Morelia, Michoacán, Mexico

Recommended Citation:
Oyama K.,Herrera-Arroyo M.L.,Rocha-Ramírez V.,et al. Gene flow interruption in a recently human-modified landscape: The value of isolated trees for the maintenance of genetic diversity in a Mexican endemic red oak[J]. Forest Ecology and Management,2017-01-01,390
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