DOI: 10.1016/j.foreco.2013.08.049
Scopus记录号: 2-s2.0-84884370808
论文题名: Tapping latex and alleles? The impacts of latex and bark harvesting on the genetic diversity of Himatanthus drasticus (Apocynaceae)
作者: Baldauf C. ; Ciampi-Guillardi M. ; dos Santos F.A.M. ; de Souza A.P. ; Sebbenn A.M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 434
结束页码: 441
语种: 英语
英文关键词: Brazilian Savanna
; Cerrado
; Janaguba
; Non-timber forest products
; Sustainable management
Scopus关键词: Brazilian Savanna
; Cerrado
; Janaguba
; Non-timber forest products
; Sustainable management
; Biodiversity
; Environmental impact
; Forestry
; Genes
; Latexes
; Sustainable development
; Harvesting
; allele
; bark
; cerrado
; conservation genetics
; fruit
; genetic marker
; genetic structure
; genetic variation
; harvesting
; inbreeding
; medicinal plant
; nontimber forest product
; phenology
; polymorphism
; population size
; rubber
; seed rain
; survival
; sustainable development
; sustainable forestry
; Biodiversity
; Forest Products
; Genes
; Harvesting
; Himatanthus
; Latex
; Sustainable Forest Management
; Araripe Basin
; Brazil
; Ceara
英文摘要: The importance of genetic variation for maintaining biological diversity and evolutionary processes is widely accepted; however, limited action has been taken to protect genetic diversity in natural populations. Until recently, it was assumed that the exploitation of non-timber forest products, such as fruits, barks and exudates, had low environmental impact, but recognition that the harvesting of these plants can affect several biological levels, including genetic diversity and structure, has been growing. Nevertheless, the effect of harvesting non-timber forest products on the genetic diversity of the harvested species is poorly understood. The objective of this work is to assess the impact of harvesting on the genetic diversity of Himatanthus drasticus (Apocynaceae), a tree of the Brazilian Savanna (Cerrado) that is highly exploited for its medicinal latex. We tested the hypothesis that harvesting can cause a trade-off between survival and reproduction in H. drasticus, reducing the effective population size as well as the genetic diversity in highly exploited populations. The study was conducted in the Araripe National Forest, a preserved Cerrado area in Ceará State, Brazil. We sampled six populations that included two different levels of harvesting (high-harvest and low-harvest) and characterized the genetic diversity and structure in two groups (adults and seedlings) using microsatellite markers. We verified high levels of polymorphism in H. drasticus; however, significant levels of inbreeding in all studied populations were also observed. We found a higher degree of genetic structure in the seedling group when compared with the adult group, a difference that was most likely due to seed rain deposited in nearby locations. No differences were detected in adult genetic diversity levels between populations under different harvesting intensities. However, seedling allelic richness was significantly lower in the high-harvested populations, indicating allelic losses that may be associated with the exploitation of bark and latex. Evidence of genetic loss due to overharvesting was supported by significant bottleneck signatures observed in the seedling group of two out of three high-harvest populations. The establishment of a conservation strategy is imperative to avoid future genetic losses and ensure the long-term viability of H. drasticus populations. The information obtained in this study has been integrated with ecological information about the effects of latex tapping on phenology, demography and biomass recovery of exploited populations, with the goal of proposing a sustainable management plan for the species. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66291
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Plant Biology, State University of Campinas (UNICAMP), CP 6109, CEP 13083-970 Campinas, SP, Brazil; Genetic Engineering and Molecular Biology Center, State University of Campinas (UNICAMP), CP 6010, CEP 13083-875 Campinas, SP, Brazil; Department of Plant Pathology, University of São Paulo (ESALQ-USP), CEP 13418-900 Piracicaba, SP, Brazil; São Paulo Forestry Institute, CP 1322, CEP 01059-970 São Paulo, SP, Brazil
Recommended Citation:
Baldauf C.,Ciampi-Guillardi M.,dos Santos F.A.M.,et al. Tapping latex and alleles? The impacts of latex and bark harvesting on the genetic diversity of Himatanthus drasticus (Apocynaceae)[J]. Forest Ecology and Management,2013-01-01,310