作者机构：
[Ouyang, Shuai; Wu, Huili; Lei, Pifeng; Kuzyakov, Yakov; Chen, Liang; Xiang, Wenhua; Zeng, Yelin; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Ouyang, Shuai; Wu, Huili; Lei, Pifeng; Kuzyakov, Yakov; Chen, Liang; Xiang, Wenhua; Zeng, Yelin; Deng, Xiangwen] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Peoples R China.;[Zeng, Lixiong; Xiao, Wenfa] Chinese Acad Forestry, Key Lab Forest Ecol & Environm, State Forestry Adm, Res Inst Forest Ecol Environm & Protect, Beijing 100091, Peoples R China.;[Li, Shenggong] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China.;[Forrester, David I.] Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.
通讯机构：
[Xiang, Wenhua] C;[Xiang, Wenhua] H;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Peoples R China.
关键词：
Chinese fir plantation;forest floor;phosphorus uptake;rhizosphere processes;soil phosphorus stock;nutrient mobilization;phosphorus recycling
期刊：
Ecology and Evolution,2019年9(9):5338-5347 ISSN：2045-7758
通讯作者：
Deng, Xiangwen
作者机构：
[Ouyang, Shuai; Xiang, Wenhua; Yan, Wende; Wu, Anchi; Fang, Xi; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha, Hunan, Peoples R China.;[Ouyang, Shuai; Xiang, Wenhua; Yan, Wende; Wu, Anchi; Fang, Xi; Deng, Xiangwen] Natl Engn Lab Appl Technol Forestry & Ecol South, Changsha, Hunan, Peoples R China.;[Ouyang, Shuai; Xiang, Wenhua; Yan, Wende; Wu, Anchi; Fang, Xi; Deng, Xiangwen] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong, Peoples R China.;[He, Honglin] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China.;[Ren, Xiaoli; He, Honglin] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China.
通讯机构：
[Deng, Xiangwen] C;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha, Hunan, Peoples R China.
关键词：
community structure;neutral theory model;niche model;secondary forests;spatial scaling;species abundance distributions
摘要：
To quantify and assess the processes underlying community assembly and driving tree species abundance distributions(SADs) with spatial scale variation in two typical subtropical secondary forests in Dashanchong state-owned forest farm, two 1-ha permanent study plots (100-m x 100-m) were established. We selected four diversity indices including species richness, Shannon-Wiener, Simpson and Pielou, and relative importance values to quantify community assembly and biodiversity. Empirical cumulative distribution and species accumulation curves were utilized to describe the SADs of two forests communities trees. Three types of models, including statistic model (lognormal and logseries model), niche model (broken-stick, niche preemption, and Zipf-Mandelbrodt model), and neutral theory model, were estimated by the fitted SADs. Simulation effects were tested by Akaike's information criterion (AIC) and Kolmogorov-Smirnov test. Results found that the Fagaceae and Anacardiaceae families were their respective dominance family in the evergreen broad-leaved and deciduous mixed communities. According to original data and random sampling predictions, the SADs were hump-shaped for intermediate abundance classes, peaking between 8 and 32 in the evergreen broad-leaved community, but this maximum increased with size of total sampled area size in the deciduous mixed community. All niche models could only explain SADs patterns at smaller spatial scales. However, both the neutral theory and purely statistical models were suitable for explaining the SADs for secondary forest communities when the sampling plot exceeded 40 m. The results showed the SADs indicated a clear directional trend toward convergence and similar predominating ecological processes in two typical subtropical secondary forests. The neutral process gradually replaced the niche process in importance and become the main mechanism for determining SADs of forest trees as the sampling scale expanded. Thus, we can preliminarily conclude that neutral processes had a major effect on biodiversity patterns in these two subtropical secondary forests but exclude possible contributions of other processes.
期刊：
Journal of Ecology,2019年107(5):2266-2277 ISSN：0022-0477
通讯作者：
Xiang, Wenhua
作者机构：
[Chen, Liang; Xiang, Wenhua; Ouyang, Shuai; Lei, Pifeng; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha, Hunan, Peoples R China.;[Chen, Liang; Xiang, Wenhua; Ouyang, Shuai; Lei, Pifeng; Deng, Xiangwen] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong, Peoples R China.;[Wang, Xiangping; Sun, Han] Beijing Forestry Univ, Coll Forestry, Beijing, Peoples R China.;[Zeng, Lixiong; Xiao, Wenfa] Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, State Forestry Adm, Key Lab Forest Ecol & Environm, Beijing, Peoples R China.;[Li, Shenggong] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China.
通讯机构：
[Xiang, Wenhua] C;[Xiang, Wenhua] H;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha, Hunan, Peoples R China.;Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong, Peoples R China.
作者机构：
[Wen, Hongfang; Ouyang, Shuai; Lei, Pifeng; Chen, Liang; Xiang, Wenhua; Wei, Xiaocong; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Ouyang, Shuai; Lei, Pifeng; Chen, Liang; Xiang, Wenhua; Deng, Xiangwen] Huitong Natl Field Stn Sci Observat & Res Chinese, Huitong 438107, Peoples R China.
通讯机构：
[Deng, Xiangwen] C;[Deng, Xiangwen] H;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;Huitong Natl Field Stn Sci Observat & Res Chinese, Huitong 438107, Peoples R China.
作者机构：
[Ouyang, Shuai; Lei, Pifeng; Xiao, Kaiyu; Xu, Chuanhong; Zhao, Zhonghui; Xiang, Wenhua; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Ouyang, Shuai; Lei, Pifeng; Xiao, Kaiyu; Zhao, Zhonghui; Xiang, Wenhua; Deng, Xiangwen] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Peoples R China.;[Li, Jiangrong] Tibet Agr & Anim Husb Univ, Ecol Res Inst Xizang Plateau, Linzhi 860000, Peoples R China.
通讯机构：
[Zhao, Zhonghui] C;[Zhao, Zhonghui] H;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Peoples R China.
关键词：
Cunninghamia lanceolata;Sap flow density;Stand transpiration;Water use
通讯机构：
Key Laboratory of Ecosystem Network Observation and Modeling, Institution of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
期刊：
Ecology and Evolution,2017年7(14):5366-5377 ISSN：2045-7758
通讯作者：
Xiang, Wenhua
作者机构：
[Chen, Lingxiu; Ouyang, Shuai; Wu, Huili; Lei, Pifeng; Xiang, Wenhua; Fang, Xi; Zhang, Shengli; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha, Hunan, Peoples R China.;[Ouyang, Shuai; Wu, Huili; Lei, Pifeng; Xiang, Wenhua; Fang, Xi; Deng, Xiangwen] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong, Hunan, Peoples R China.
通讯机构：
[Xiang, Wenhua] C;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha, Hunan, Peoples R China.
关键词：
competitive ability;functional traits;relative growth rate;shade tolerance;tree social status
摘要：
Abstract Wood density (WD) is not only an important parameter to estimate aboveground biomass but also an indicator of timber quality and plant adaptation strategies to stressful conditions (i.e., windthrow, pests, and pathogens). This study had three objectives: (1) to compare WD among seven subtropical tree species; (2) to determine how tree growth traits may influence possible differences in WD between the pioneer and shade‐tolerant species; and (3) to examine whether or not WD differs by tree social status (dominant vs. suppressed trees) within species. To do this, 70 trees were destructively harvested. From each tree, disks at different stem heights were obtained and subjected to a method of stem analysis to measure whole tree level WD. The results showed that WD differed significantly among the seven species (p<.001). Their average WD was 0.537g/cm3, ranging from 0.409g/cm3 for Choerospondias axillaris to 0.691g/cm3 for Cyclobalanopsis glauca. The average WD of the four pioneer species (0.497±0.13g/cm3) was significantly lower (p<.01) than that of the three shade‐tolerant species (0.589±0.12g/cm3). The WD of the pioneers had a significant positive correlation with their stem diameter at breast height (DBH), tree height (H), and tree age, but WD had a significant negative correlation with relative growth rate (RGR). In contrast, the WD of the shade‐tolerant tree species had no significant relationships with DBH, H, tree age, or RGR. The dominant trees of the pioneer species had a higher WD than the suppressed trees, whereas the shade‐tolerant species had a lower WD for dominant trees than the suppressed trees. However, the differences in WD between dominant and suppressed trees were not significant. Taken together, the results suggest that classifying species into pioneer and shade‐tolerant groups to examine the effects of tree growth traits and social status could improve our understanding of intra‐ and interspecific variation in WD among subtropical tree species. We investigated inter‐ and intraspecific variation in WD among seven tree species in the subtropical region of Jingzhou County, Hunan Province, southern China. And the results imply that influences of tree growth traits and social status on WD were more pronounced for early successional tree species than late successional tree species in subtropical China
作者机构：
[Ouyang, Shuai; Wu, Huili; Lei, Pifeng; Xiang, Wenhua; Fang, Xi; Deng, Xiangwen] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;[Ouyang, Shuai; Wu, Huili; Lei, Pifeng; Xiang, Wenhua; Fang, Xi; Deng, Xiangwen] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Hunan, Peoples R China.
通讯机构：
[Xiang, Wenhua] C;[Xiang, Wenhua] H;Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China.;Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Hunan, Peoples R China.
摘要：
Forests contain one of the world's largest carbon (C) pools and represent opportunities for cost-effective climate change mitigation through programmes such as the United Nations-led "Reducing Emissions from Deforestation and Forest Degradation" Programme (REDD). Generic estimates for the conversion of forest biomass into C stock are not sufficiently accurate for assessing the utility of harvesting forest to offset carbon dioxide emissions, currently under consideration by the REDD Programme. We examined the variation in C concentration among tree species and tree functional types (classified based on leaf morphological and phenological traits) in a subtropical forest and evaluated the effects of these variations on stand-level estimations of C stock. This study was conducted in the Paiyashan Forest State Farm and the Dashanchong Forest Park, Hunan Province, China. C concentrations differed significantly among tree species (P < 0.0001) and were significantly higher in gymnosperm than angiosperm species. Estimations of stand C stocks were similar using either functional types or species- and tissue-specific C concentrations. The use of functional type classification to estimate stand C stock is an effective tool for implementing C sequestration trade and C credit programmes and the UN-REDD Programme in subtropical forests.
