Lower within-community variance of negative density dependence increases forest diversity.
Lower within-community variance of negative density dependence increases forest diversity.
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DOI：
10.1371/journal.pone.0127260
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Dionisio F
中科院分区：
文献类型：
--
作者：
Miranda A;Carvalho LM;Dionisio F
当地丰富的成年树木通过寄主特异性天敌阻碍同种幼苗的生长，这是Janzen和Connell首次提出的解释森林植物多样性的机制。虽然一些研究表明，这一机制的重要性，仍然有很少的信息，负密度依赖（NDD）的方差如何影响森林群落的多样性。通过计算机模拟，分析了树木群落内NDD的强度和方差对物种多样性的影响。我们发现，更强的NDD导致更高的物种多样性。此外，较低的NDD强度范围内的一个社区增加物种丰富度和减少物种丰富度的方差。我们的研究结果表明，除了平均强度的NDD，方差的NDD也是至关重要的，以解释物种多样性。这可以解释热带和温带森林生物多样性的差异：高度多样性的森林可能具有较低的NDD方差。这份报告表明，天敌及其影响程度的多样性有助于维持生物多样性。
Local abundance of adult trees impedes growth of conspecific seedlings through host-specific enemies, a mechanism first proposed by Janzen and Connell to explain plant diversity in forests. While several studies suggest the importance of this mechanism, there is still little information of how the variance of negative density dependence (NDD) affects diversity of forest communities. With computer simulations, we analyzed the impact of strength and variance of NDD within tree communities on species diversity. We show that stronger NDD leads to higher species diversity. Furthermore, lower range of strengths of NDD within a community increases species richness and decreases variance of species abundances. Our results show that, beyond the average strength of NDD, the variance of NDD is also crucially important to explain species diversity. This can explain the dissimilarity of biodiversity between tropical and temperate forest: highly diverse forests could have lower NDD variance. This report suggests that natural enemies and the variety of the magnitude of their effects can contribute to the maintenance of biodiversity.
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影响因子：
3.4
作者：
Bonanomi, G;Giannino, F;Mazzoleni, S
通讯作者：
Mazzoleni, S
DOI：
10.1111/1365-2745.12269
发表时间：
2014-09
期刊：
The Journal of ecology
影响因子：
--
作者：
Mack KM;Bever JD
通讯作者：
Bever JD
影响因子：
2.9
作者：
Terborgh, John
通讯作者：
Terborgh, John
影响因子：
2.7
作者：
AUGSPURGER, CK;KELLY, CK
通讯作者：
KELLY, CK
影响因子：
4.8
作者：
BEVER, JD
通讯作者：
BEVER, JD