Scale dependent structuring of spatial diversity in two temperate forest communities

Zhang, Chunyu; Jin, Wei-Tao; Gao, Lushuang; Zhao, Xiuhai

doi:10.1016/j.foreco.2013.07.025

Cited by 19 publications

(15 citation statements)

References 24 publications

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“…According to the ISAR and mISAR results, the majority of the studied species act as diversity accumulators, especially at distances closer than 10 m (Zhang et al. ). Therefore, the diversity‐promoting interactions are likely to increase the local species diversity in our study area.…”

Section: Discussionmentioning

confidence: 99%

Relationships between tree biomass productivity and local species diversity

et al. 2016

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Abstract. This study evaluated the relationship between the productivity of aboveground coarse woody biomass and species richness at individual species and community levels in two large and fully stemmapped temperate forest plots in northeastern China. Although productivity-diversity relationships (PDRs) have been investigated for different forest ecosystems, specific patterns have rarely been documented for individual species. In our study, the PDR patterns were found to be scale dependent at the community level in both research forests. Productivity is positively linked with species richness at the 20 × 20 m sampling scale. At the 40 × 40 m scale, however, significantly positive PDRs were only observed in the mature forest. A summary statistic combining both productivity and richness characteristics was used to investigate whether and at which spatial scale individual species show positive, negative, or neutral PDRs. The results show that 66.7% of all focal species exhibited positive or negative PDRs in the near-mature forest, while 64.3% exhibited positive or negative PDRs in the mature forest. Contrary to expectations, there were few species showing positive PDRs in either forest. PDR patterns were found to be scale dependent in both forest types: Negative PDRs dominate at close neighborhoods in the nearmature forest, while both positive and negative PDRs were found in the mature forest. To our knowledge, this is the first analysis that evaluates the PDRs of individual species based on facilitative and competitive effects in their neighborhoods.

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Section: Discussionmentioning

confidence: 99%

Relationships between tree biomass productivity and local species diversity

et al. 2016

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“…The forest was heavily disturbed by forest management about 60 years ago, and most canopy trees are now 100–120 years old (Zhang et al. ). The topography in the MF is usually flat with elevations ranging from 459 to 517 m above sea level.…”

Section: Methodsmentioning

confidence: 99%

Drivers of seedling survival in a temperate forest and their relative importance at three stages of succession

Yan

Zhang

Wang

et al. 2015

Ecology and Evolution

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Negative density dependence (NDD) and niche partitioning have been perceived as important mechanisms for the maintenance of species diversity. However, little is known about their relative contributions to seedling survival. We examined the effects of biotic and abiotic neighborhoods and the variations of biotic neighborhoods among species using survival data for 7503 seedlings belonging to 22 woody species over a period of 2 years in three different forest types, a half‐mature forest (HF), a mature forest (MF), and an old‐growth forest (OGF), each of these representing a specific successional stage in a temperate forest ecosystem in northeastern China. We found a convincing evidence for the existence of NDD in temperate forest ecosystems. The biotic and abiotic variables affecting seedlings survival change with successional stage, seedling size, and age. The strength of NDD for the smaller (<20 cm in height) and younger seedlings (1–2 years) as well as all seedlings combined varies significantly among species. We found no evidence that a community compensatory trend (CCT) existed in our study area. The results of this study demonstrate that the relative importance of NDD and habitat niche partitioning in driving seedling survival varies with seedling size and age and that the biotic and abiotic factors affecting seedlings survival change with successional stage.

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“…We used a modified version of the ISAR to assess the contribution of individual focal species to structuring local species richness in two 25.6 ha, fully mapped forest research plots. Our study sites are temperate old-growth coniferous forests, permitting a novel application of the ISAR concept; the few earlier studies to investigate ISAR have been limited to angiosperm-dominated forests (Punchi-Manage et al, 2015;Tsai et al, 2015;Wiegand et al, 2007;Yang et al, 2013;Zhang, Jin, Gao, & Zhao, 2014) and shrublands (e.g. Chacón-Labella, Cruz, & Escudero, 2016;Perry, Miller, Lamont, & Enright, 2017).…”

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Individual species–area relationships in temperate coniferous forests

Das

Larson

Lutz

2018

J Vegetation Science

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Questions What drives individual species–area relationships in temperate coniferous forests? Location Two 25.6‐ha forest plots on the Pacific Slope of North America, one in California, and one in Washington State. Methods We mapped all trees ≥1 cm in diameter and examined tree species diversity of their local neighbourhoods by calculating the individual species–area relationship for each species and for each of three diameter classes (saplings, mature trees and large‐diameter trees). Results In the California plot, small trees in four of the five major species occurred in neighbourhoods with higher levels of diversity than would be expected at random. In the Washington plot, small trees for four of five abundant species had neighbourhoods with lower than expected diversity at distances ≤5 m for small trees. However, at distances >5 m, all five species showed higher than expected diversity in their neighbourhoods. Larger trees at both plots tended to occur in neighbourhoods with lower than expected diversity, and no large‐diameter focal species had neighbourhoods with higher than expected diversity. Conclusion Diversity and co‐existence in temperate conifer‐dominated forests do not appear to be the result of random processes. Competitive interactions appear to dominate for the largest trees of most species, resulting in neighbourhoods with lower diversity. For smaller trees, we suggest that a positive response to environmental heterogeneity is the likely driver of neighbourhoods with higher than expected diversity, although we cannot rule out the possibility that facilitation or conspecific negative density dependence (CNDD) also play a role.

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Scale dependent structuring of spatial diversity in two temperate forest communities

Cited by 19 publications

References 24 publications

Relationships between tree biomass productivity and local species diversity

Relationships between tree biomass productivity and local species diversity

Drivers of seedling survival in a temperate forest and their relative importance at three stages of succession

Individual species–area relationships in temperate coniferous forests

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