Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
New Phytol. 2012 Feb;193(3):779-786. doi: 10.1111/j.1469-8137.2011.03957.x. Epub 2011 Nov 22.
• This study aimed to reveal species-genetic diversity correlations (SGDCs) and their underlying mechanisms in natural and disturbed forests. • A community survey and molecular analyses were carried out to compare species diversity (SD), the genetic diversity of the dominant tree species Euptelea pleiospermum (GD), the altitudinal patterns of SD and GD, SGDC, genetic differentiation (F(ST) ), community divergence (F(ST) -C), effective population size (N(e) ), and recent migration rate between mountain riparian forests along the Yandu (natural) and Nan (disturbed) rivers. • In natural forests, both SD and GD showed a unimodal altitudinal pattern and GD was positively correlated with SD, whereas a unimodal pattern and positive SGDC were not found in the disturbed forests. SD and F(ST) at the natural sites were higher than those at the disturbed sites. However, there were no significant differences in GD, F(ST) -C, N(e) or recent migration rate between the natural and disturbed sites. • A correlation between the patterns of SD and GD along a geographical gradient (e.g. altitude) is an important driver of positive SGDC. The absence of positive SGDC in the disturbed forests may result from reduced SD but unaffected GD, indicating nonparallel changes in SD and GD. This study furthermore cautions against generalizations about changes in SD and GD following disturbance.
• 本研究旨在揭示自然和干扰森林中物种-遗传多样性相关性（SGDC）及其潜在机制。 • 通过群落调查和分子分析，比较了物种多样性（SD）、优势树种糙皮桦（GD）的遗传多样性、SD 和 GD 的海拔模式、SGDC、遗传分化（F(ST)）、群落分歧（F(ST)-C）、有效种群大小（N(e)）以及沿盐都（自然）和南（干扰）河的山地河岸森林之间的近期迁移率。 • 在自然森林中，SD 和 GD 均呈现单峰海拔模式，且 GD 与 SD 呈正相关，而在干扰森林中则未发现单峰模式和正 SGDC。自然地点的 SD 和 F(ST)高于干扰地点。然而，自然和干扰地点之间的 GD、F(ST)-C、N(e)或近期迁移率没有显著差异。 • SD 和 GD 在地理梯度（如海拔）上的模式之间的相关性是正 SGDC 的重要驱动因素。干扰森林中不存在正 SGDC 可能是由于 SD 降低但 GD 不受影响所致，表明 SD 和 GD 的变化非平行。本研究进一步警告不要对干扰后 SD 和 GD 的变化进行泛化。
