Understanding local patterns of genetic diversity in dipterocarps using a multi-site, multi-species approach: Implications for forest management and restoration
Understanding local patterns of genetic diversity in dipterocarps using a multi-site, multi-species approach: Implications for forest management and restoration
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DOI：
10.1016/j.foreco.2015.07.023
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发表时间：
2015-11-15
影响因子：
3.7
通讯作者：
Kettle, C. J.
中科院分区：
文献类型：
--
作者：
de Morais, C. Tito;Ghazoul, J.;Kettle, C. J.
东南亚的低地热带森林主要由一个单一的树冠和挺水树科，龙脑香科。龙脑香种子为重力或旋转散布。短距离和有限的种子传播通过这些机制导致相关个体的聚集和强大的精细尺度空间遗传结构（FSGS）。在被砍伐和破碎的森林中，基因流可能会被破坏，具有强FSGS的树种预计会表现出增加的近亲繁殖，因此可能会侵蚀遗传多样性，适应性，并可能限制龙脑香的自然再生潜力。制定一套FSGS的间接操作指标，为采伐森林中森林遗传资源的保护和管理提供了坚实的基础。我们的主要目标是使用信息理论的方法来确定这些指标的FSGS在龙脑香果。我们在马来西亚婆罗洲，印度和塞舌尔的四个森林站点的19个龙脑香属物种的FSGS量化。我们在15个（79%）我们的研究物种中检测到FSGS，其中大多数表现出显着的近亲繁殖。我们的研究结果表明，木材密度和花的大小提供了有用的指标FSGS。我们提出了一些简单的指导方针，让森林管理人员负责FSGS时，规划方法，以保持遗传多样性的立场记录龙脑香林。整合对遗传过程的更好理解对于保护林木遗传资源和确保采伐森林的复原力至关重要。(C)2015 Elsevier B.V.版权所有。
The lowland tropical forests of Southeast Asia are dominated by a single family of canopy and emergent trees, the Dipterocarpaceae. The seeds of dipterocarps are gravity or gyration dispersed. Short distance and limited seed dispersal via these mechanisms result in the aggregation of related individuals and strong fine-scale spatial genetic structure (FSGS). In logged and fragmented forests, where gene flow may be disrupted, tree species with strong FSGS are predicted to exhibit increased inbreeding, which consequently can erode genetic diversity, fitness and might limit the potential for natural regeneration of dipterocarps. Developing a set of indirect operational indicators for FSGS provides a solid basis for informing conservation and management of forest genetic resources in logged forests. Our main objective was to use an information theoretic approach to identify these indicators of FSGS in dipterocarps. We quantify FSGS in 19 dipterocarp species across four forest sites in Malaysian Borneo, India and the Seychelles. We detected FSGS in 15 (79%) of our study species, most of which displayed significant inbreeding. Our results suggest that wood density and flower size offer useful indicators of FSGS. We propose some simple guidelines to allow forest managers to account for FSGS when planning approaches to maintain genetically diverse stands in logged dipterocarp forests. The integration of improved understanding of genetic processes is essential for conserving forest tree genetic resources and ensuring the resilience of logged forests. (C) 2015 Elsevier B.V. All rights reserved.