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Dai D, Yang J, Wu Y, Zhang W, Wu X, Liu Y, Xing H, Liu Y. Correlation between fine root traits and pathogen richness depends on plant mycorrhizal types. OIKOS 2022. [DOI: 10.1111/oik.09354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong Dai
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences, East China Normal Univ. Shanghai China
| | - Jiarong Yang
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences, East China Normal Univ. Shanghai China
| | - Yougui Wu
- Fengyangshan‐Baishanzu National Nature Reserve Zhejiang Province China
| | - Wenhua Zhang
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences, East China Normal Univ. Shanghai China
| | - Xian Wu
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences, East China Normal Univ. Shanghai China
| | - Yajing Liu
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences, East China Normal Univ. Shanghai China
| | - Hua Xing
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences, East China Normal Univ. Shanghai China
| | - Yu Liu
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences, East China Normal Univ. Shanghai China
- Shanghai Inst. of Pollution Control and Ecological Security Shanghai China
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Negative Density Restricts the Coexistence and Spatial Distribution of Dominant Species in Subtropical Evergreen Broad-Leaved Forests in China. FORESTS 2022. [DOI: 10.3390/f13081227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Negative densification affects the spatial distribution of species in secondary evergreen broad-leaved forests and is a key mechanism governing species coexistence. We investigated the effects of habitat heterogeneity and density on the spatial distribution of populations of dominant woody species in a secondary evergreen broad-leaved forest in Wuchaoshan using spatial univariate point pattern analyses. This 6 ha forest dynamic monitoring sample area in Hangzhou, China is a typical secondary subtropical evergreen broad-leaved forest. We found (1) a strong effect of habitat heterogeneity that led to the spatial aggregation of dominant species in the plot. Habitat heterogeneity had a strong impact on mature individuals at different life history stages and of different species on a large scale. (2) Negative density dependence (NDD) generally affected spatial distributions of most dominant species and decreased in magnitude with age class. Therefore, different species of subtropical evergreen broad-leaved forests in China have formed unique spatial structures due to their habitat preferences but are generally subjected to density-dependent effects.
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Spatial Distribution and Species Association of Dominant Tree Species in Huangguan Plot of Qinling Mountains, China. FORESTS 2022. [DOI: 10.3390/f13060866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The spatial distribution pattern and population structure of trees are shaped by multiple processes, such as species characteristics, environmental factors, and intraspecific and interspecific interactions. Studying the spatial distribution patterns of species, species associations, and their relationships with environmental factors is conducive to uncovering the mechanisms of biodiversity maintenance and exploring the underlying ecological processes of community stability and succession. This study was conducted in a 25-ha Qinling Huangguan forest (warm-temperate, deciduous, broad-leaved) dynamic monitoring plot. We used univariate and bivariate g(r) functions of the point pattern analysis method to evaluate the spatial distribution patterns of dominant tree species within the community, and the intra- and interspecific associations among different life-history stages. Complete spatial randomness and heterogeneous Poisson were used to reveal the potential process of community construction. We also used Berman’s test to determine the effect of three topographic variables on the distribution of dominant species. The results indicated that all dominant species in this community showed small-scale aggregation distribution. When we excluded the influence of environmental heterogeneity, the degree of aggregation distribution of each dominant species tended to decrease, and the trees mainly showed random or uniform distribution. This showed that environmental heterogeneity significantly affects the spatial distribution of tree species. Dominant species mainly showed positive associations with one another among different life-history stages, while negative associations prevailed among different tree species. Furthermore, we found that the associations between species were characterized by interspecific competition. Berman’s test results under the assumption of complete spatial randomness showed that the distribution of each dominant species was mainly affected by slope and convexity.
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Elias F, Marimon BS, Marimon-Junior BH, Budke JC, Esquivel-Muelbert A, Morandi PS, Reis SM, Phillips OL. Idiosyncratic soil-tree species associations and their relationships with drought in a monodominant Amazon forest. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 2018. [DOI: 10.1016/j.actao.2018.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Yao J, Zhang X, Zhang C, Zhao X, von Gadow K. Effects of density dependence in a temperate forest in northeastern China. Sci Rep 2016; 6:32844. [PMID: 27604642 PMCID: PMC5015110 DOI: 10.1038/srep32844] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 08/10/2016] [Indexed: 11/23/2022] Open
Abstract
Negative density dependence may cause reduced clustering among individuals of the same species, and evidence is accumulating that conspecific density-dependent self-thinning is an important mechanism regulating the spatial structure of plant populations. This study evaluates that specific density dependence in three very large observational studies representing three successional stages in a temperate forest in northeastern China. The methods include standard spatial point pattern analysis and a heterogeneous Poisson process as the null model to eliminate the effects of habitat heterogeneity. The results show that most of the species exhibit conspecific density-dependent self-thinning. In the early successional stage 11 of the 16 species, in the intermediate successional stage 18 of the 21 species and in the old growth stage all 21 species exhibited density dependence after removing the effects of habitat heterogeneity. The prevalence of density dependence thus varies among the three successional stages and exhibits an increase with increasing successional stage. The proportion of species showing density dependence varied depending on whether habitat heterogeneity was removed or not. Furthermore, the strength of density dependence is closely related with species abundance. Abundant species with high conspecific aggregation tend to exhibit greater density dependence than rare species.
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Affiliation(s)
- Jie Yao
- Key Laboratory for Forest Resources & Ecosystem Processes of Beijing, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Xinna Zhang
- Key Laboratory for Forest Resources & Ecosystem Processes of Beijing, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Chunyu Zhang
- Key Laboratory for Forest Resources & Ecosystem Processes of Beijing, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Xiuhai Zhao
- Key Laboratory for Forest Resources & Ecosystem Processes of Beijing, Beijing Forestry University, No. 35 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Klaus von Gadow
- Faculty of Forestry and Forest Ecology, Georg-August-University Göttingen, Büsgenweg 5, D-37077 Göttingen, Germany
- Department of Forest and Wood Science, University of Stellenbosch, South Africa
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6
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Feng G, Mi X, Yan H, Li FY, Svenning JC, Ma K. CForBio: a network monitoring Chinese forest biodiversity. Sci Bull (Beijing) 2016. [DOI: 10.1007/s11434-016-1132-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hu G, Feeley KJ, Yu M. Habitat Fragmentation Drives Plant Community Assembly Processes across Life Stages. PLoS One 2016; 11:e0159572. [PMID: 27427960 PMCID: PMC4948860 DOI: 10.1371/journal.pone.0159572] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 07/04/2016] [Indexed: 11/23/2022] Open
Abstract
Habitat fragmentation is one of the principal causes of biodiversity loss and hence understanding its impacts on community assembly and disassembly is an important topic in ecology. We studied the relationships between fragmentation and community assembly processes in the land-bridge island system of Thousand Island Lake in East China. We focused on the changes in species diversity and phylogenetic diversity that occurred between life stages of woody plants growing on these islands. The observed diversities were compared with the expected diversities from random null models to characterize assembly processes. Regression tree analysis was used to illustrate the relationships between island attributes and community assembly processes. We found that different assembly processes predominate in the seedlings-to-saplings life-stage transition (SS) vs. the saplings-to-trees transition (ST). Island area was the main attribute driving the assembly process in SS. In ST, island isolation was more important. Within a fragmented landscape, the factors driving community assembly processes were found to differ between life stage transitions. Environmental filtering had a strong effect on the seedlings-to-saplings life-stage transition. Habitat isolation and dispersal limitation influenced all plant life stages, but had a weaker effect on communities than area. These findings add to our understanding of the processes driving community assembly and species coexistence in the context of pervasive and widespread habitat loss and fragmentation.
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Affiliation(s)
- Guang Hu
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- Department of Landscape Architecture, School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, China
| | - Kenneth J. Feeley
- International Center of Tropical Botany, Department of Biological Sciences, Florida International University, Miami, Florida, United States of America
- Center for Tropical Plant Conservation, Fairchild Tropical Botanic Garden, Coral Gables, Florida, United States of America
| | - Mingjian Yu
- College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
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Velázquez E, Kazmierczak M, Wiegand T. Spatial patterns of sapling mortality in a moist tropical forest: consistency with total density‐dependent effects. OIKOS 2015. [DOI: 10.1111/oik.02520] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Eduardo Velázquez
- Dept of Ecological Modelling Helmholtz Centre for Environmental Research ‐ UFZ Permoserstrasse 15 DE‐04318 Leipzig Germany
| | - Martin Kazmierczak
- Dept of Ecological Modelling Helmholtz Centre for Environmental Research ‐ UFZ Permoserstrasse 15 DE‐04318 Leipzig Germany
| | - Thorsten Wiegand
- Dept of Ecological Modelling Helmholtz Centre for Environmental Research ‐ UFZ Permoserstrasse 15 DE‐04318 Leipzig Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e DE‐04103 Leipzig Germany
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Sugiyama A. Recruitment Distance from the Nearest Reproductive Conspecific Increases with Tree Size in Tropical Premontane Wet Forests. Biotropica 2015. [DOI: 10.1111/btp.12241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna Sugiyama
- Department of Plant Biology; University of Georgia; Athens GA 30602 U.S.A
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Jia HR, Chen Y, Yuan ZL, Ye YZ, Huang QC. Effects of Environmental and Spatial Heterogeneity on Tree Community Assembly in Baotianman National Nature Reserve, Henan, China. POLISH JOURNAL OF ECOLOGY 2015. [DOI: 10.3161/15052249pje2015.63.2.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Tsai CH, Lin YC, Wiegand T, Nakazawa T, Su SH, Hsieh CH, Ding TS. Individual species-area relationship of woody plant communities in a heterogeneous subtropical monsoon rainforest. PLoS One 2015; 10:e0124539. [PMID: 25884405 PMCID: PMC4401546 DOI: 10.1371/journal.pone.0124539] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 03/15/2015] [Indexed: 11/19/2022] Open
Abstract
The spatial structure of species richness is often characterized by the species-area relationship (SAR). However, the SAR approach rarely considers the spatial variability of individual plants that arises from species interactions and species' habitat associations. Here, we explored how the interactions of individual plants of target species influence SAR patterns at a range of neighborhood distances. We analyzed the data of 113,988 woody plants of 110 species from the Fushan Forest Dynamics Plot (25 ha), northern Taiwan, which is a subtropical rainforest heavily influenced by typhoons. We classified 34 dominant species into 3 species types (i.e., accumulator, repeller, or no effect) by testing how the individual species-area relationship (i.e., statistics describing how neighborhood species richness changes around individuals) of target species departs (i.e., positively, negatively, or with no obvious trend) from a null model that accounts for habitat association. Deviation from the null model suggests that the net effect of species' interactions increases (accumulate) or decreases (repel) neighborhood species richness. We found that (i) accumulators were dominant at small interaction distances (<10-30 m); (ii) the detection of accumulator species was lower at large interaction distances (>30 m); (iii) repellers were rarely detected; and (iv) large-sized and abundant species tended to be accumulators. The findings suggest that positive species interactions have the potential to accumulate neighborhood species richness, particularly through size- and density-dependent mechanisms. We hypothesized that the frequently disturbed environment of this subtropical rainforest (e.g., typhoon-driven natural disturbances such as landslides, soil erosion, flooding, and windthrow) might create the spatial heterogeneity of species richness and promote positive species interactions.
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Affiliation(s)
- Cheng-Han Tsai
- School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan
- Institute of Oceanography, National Taiwan University, Taipei, Taiwan
| | - Yi-Ching Lin
- Department of Life Science, Tunghai University, Taichung, Taiwan
| | - Thorsten Wiegand
- Department of Ecological Modelling, UFZ Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - Takefumi Nakazawa
- Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan
| | | | - Chih-Hao Hsieh
- Institute of Oceanography, National Taiwan University, Taipei, Taiwan
- Institute of Ecology and Evolutionary Biology, National Taiwan University, Taipei, Taiwan
| | - Tzung-Su Ding
- School of Forestry and Resource Conservation, National Taiwan University, Taipei, Taiwan
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Dahlgren JP, Ostergård H, Ehrlén J. Local environment and density-dependent feedbacks determine population growth in a forest herb. Oecologia 2014; 176:1023-32. [PMID: 25224800 DOI: 10.1007/s00442-014-3073-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 08/29/2014] [Indexed: 12/18/2022]
Abstract
Linking spatial variation in environmental factors to variation in demographic rates is essential for a mechanistic understanding of the dynamics of populations. However, we still know relatively little about such links, partly because feedbacks via intraspecific density make them difficult to observe in natural populations. We conducted a detailed field study and investigated simultaneous effects of environmental factors and the intraspecific density of individuals on the demography of the herb Lathyrus vernus. In regression models of vital rates we identified effects associated with spring shade on survival and growth, while density was negatively correlated with these vital rates. Density was also negatively correlated with average individual size in the study plots, which is consistent with self-thinning. In addition, average plant sizes were larger than predicted by density in plots that were less shaded by the tree canopy, indicating an environmentally determined carrying capacity. A size-structured integral projection model based on the vital rate regressions revealed that the identified effects of shade and density were strong enough to produce differences in stable population sizes similar to those observed in the field. The results illustrate how the local environment can determine dynamics of populations and that intraspecific density may have to be more carefully considered in studies of plant demography and population viability analyses of threatened species. We conclude that demographic approaches incorporating information about both density and key environmental factors are powerful tools for understanding the processes that interact to determine population dynamics and abundances.
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Affiliation(s)
- Johan P Dahlgren
- Department of Biology and Max-Planck Odense Center on the Biodemography of Aging, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark,
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Piao T, Chun JH, Yang HM, Cheon K. Negative density dependence regulates two tree species at later life stage in a temperate forest. PLoS One 2014; 9:e103344. [PMID: 25058660 PMCID: PMC4110017 DOI: 10.1371/journal.pone.0103344] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 07/01/2014] [Indexed: 11/26/2022] Open
Abstract
Numerous studies have demonstrated that tree survival is influenced by negative density dependence (NDD) and differences among species in shade tolerance could enhance coexistence via resource partitioning, but it is still unclear how NDD affects tree species with different shade-tolerance guilds at later life stages. In this study, we analyzed the spatial patterns for trees with dbh (diameter at breast height) ≥2 cm using the pair-correlation g(r) function to test for NDD in a temperate forest in South Korea after removing the effects of habitat heterogeneity. The analyses were implemented for the most abundant shade-tolerant (Chamaecyparis obtusa) and shade-intolerant (Quercus serrata) species. We found NDD existed for both species at later life stages. We also found Quercus serrata experienced greater NDD compared with Chamaecyparis obtusa. This study indicates that NDD regulates the two abundant tree species at later life stages and it is important to consider variation in species' shade tolerance in NDD study.
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Affiliation(s)
- Tiefeng Piao
- Institute of Soil and Water Conservation, Northwest A&F University, Yangling, China
- Division of Forest Ecology, Department of Forest Conservation, Korea Forest Research Institute, Seoul, Republic of Korea
| | - Jung Hwa Chun
- Division of Forest Ecology, Department of Forest Conservation, Korea Forest Research Institute, Seoul, Republic of Korea
| | - Hee Moon Yang
- Division of Forest Ecology, Department of Forest Conservation, Korea Forest Research Institute, Seoul, Republic of Korea
| | - Kwangil Cheon
- Division of Forest Ecology, Department of Forest Conservation, Korea Forest Research Institute, Seoul, Republic of Korea
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