Liu Y.-Q.,Jiangxi Agricultural University |
Wang F.,Station of Environmental Protection |
Ke G.-Q.,Ruichang Bureau of Forestry |
Wang Y.-Y.,Shenzhen Fruit and Vegetable Company |
And 2 more authors.
Chinese Journal of Applied Ecology
Taking the forest lands having been converted from cultivated land for 5 years in Ruichang City of Jiangxi Province as test objects, this paper studied the characteristics of soil organic carbon (SOC) under 4 different conversion models (forest-seedling integration, pure medicinal forest, bamboo-broadleaved mixed forest, and multi-species mixed forest). After the conversion from cultivated land into forestlands, the contents of SOC, microbial biomass carbon (MBC), and mineralizable carbon (PMC) in 0-20 cm soil layer increased by 24.4%, 29%, and 18.4%, respectively, compared with those under the conversion from cultivated land into wasteland (P < 0.05), which indicated that the conversion from cultivated land into forest lands significantly increased the SOC content and SOC storage. The SOC, MBC, and PMC contents in 0-10 cm soillayer were significantly higher than those in 10-20 cm soil layer (P<0.01), and the differences between the soil layers of the four forest lands were higher than those of the wasteland. Among the 4 conversion models, forest-seedling integration had more obvious effects on SOC. Source
Shi J.-M.,Jiangxi Agricultural University |
Shi J.-M.,Jiangxi Province Key Laboratory for Bamboo Germplasm Resources and Utilization |
Fan C.-F.,Ruichang Bureau of Forestry |
Liu Y.,Nanjing Forestry University |
And 7 more authors.
Chinese Journal of Applied Ecology
To detect the ecological process of the succession series of Phyllostachys glauca forest in a limestone mountain, five niche models, i.e., broken stick model (BSM), niche preemption model (NPM), dominance preemption model (DPM), random assortment model (RAM) and overlapping niche model (ONM) were employed to describe the species-abundance distribution patterns (SDPs) of 15 samples. Χ2 test and Akaike information criterion (AIC) were used to test the fitting effects of the five models. The results showed that the optimal SDP models for P. glauca forest, bamboo-broadleaved mixed forest and broadleaved forest were DPM (Χ2=35.86, AIC=-69.77), NPM (Χ2=1.60, AIC=-94.68) and NPM (Χ2=0.35, AIC=-364.61), respectively. BSM also well fitted the SDP of bamboo-broadleaved mixed forest and broad-leaved forest, while it was unsuitable to describe the SDP of P. glauca forest. The fittings of RAM and ONM in the three forest types were all rejected by the Χ2 test and AIC. With the development of community succession from P. glauca forest to broadleaved forest, the species richness and evenness increased, and the optimal SDP model changed from DPM to NPM. It was inferred that the change of ecological process from habitat filtration to interspecific competition was the main driving force of the forest succession. The results also indicated that the application of multiple SDP models and test methods would be beneficial to select the best model and deeply understand the ecological process of community succession. © 2015, Editorial Board of Chinese Journal of Applied Ecology. All right reserved. Source
Fan Y.,Jiangxi Agricultural University |
Fan Y.,Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization |
Li Z.-Y.,Jiangxi Agricultural University |
Li Z.-Y.,Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization |
And 9 more authors.
Chinese Journal of Ecology
To clarify the species diversity change and its influential drivers along the succession of Phyllostachys glauca forest, bamboo-broadleaved mixed forest and broadleaved forest in a limestone mountain in Ruichang City, Jiangxi Province, China, we analyzed the species composition, diversity index and environmental factors in fifteen plots from the three succession stages. The results showed that the numbers of species, genus and family increased from P. glauca forest to broadleaved forest. The woody plant diversity and herbaceous plant diversity increased from P. glauca forest to broadleaved forest, with the exception of the Simpson index and Pielou index of herbaceous plant, which were the highest at the middle succession stage of bamboo-broadleaved mixed forest. On the contrary, the community similarity decreased along the succession series because of the accelerated species turnover rate. The species richness of community and herbaceous layer, and Shannon index of herbaceous plants were closely related to soil depth and rock coverage in the succession process of P. glauca forest. Our findings indicated that the soil formation and improvement may be the major driver of increased plant diversity during the succession from P. glauca forest to broadleaved forest in the limestone mountain. © 2014, editorial Board of Chinese Journal of Ecology. All rights reserved. Source