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Assessment of Genetic Variability and Inter-specific Relationships among Four Species of Groupers (Genus Epinephelus) from South China Sea Using Microsatellite Markers 被引量:2
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作者 尹绍武 黄海 +1 位作者 骆剑 胡亚丽 《Agricultural Science & Technology》 CAS 2012年第2期428-433,共6页
[Objective] The study aimed to evaluate the genetic variability and interspecific relationships among four species of groupers from South China Sea, including E. fario, E. merra, E. malabaricus and E. coioides. [Metho... [Objective] The study aimed to evaluate the genetic variability and interspecific relationships among four species of groupers from South China Sea, including E. fario, E. merra, E. malabaricus and E. coioides. [Method] Twenty one mircosatellite loci of groupers were selected from GenBank and eight high polymorphic loci were used to further genetic analysis. [Result] The mean number of alleles per locus (A), effective number of alleles (Ne), mean polymorphism information content (PIC), observed heterozygosity (Ho) and expected heterozygosity (He) were 4.38±1.60, 3.69±0.86, 0.69±0.08, 0.67±0.08, 0.72±0.06 in E. malabaricus; 3.88±1.13, 3.55±1.04, 0.66±0.10, 0.68±0.21, 0.70±0.08 in E.coioides; 6.00±1.07, 4.68±0.65, 0.78±0.03, 0.73±0.25, 0.79±0.03 in E. fario; 5.50±1.07, 4.58±0.80, 0.76±0.05, 0.75±0.18, 0.78±0.04 in E. merra, respectively. [Conclusion] We compared the values above, the order of the genetic variability among these grouper species was E. fario E. merra E. malabaricus E. coioides. We found that the level of genetic variability of these groupers species was relatively higher than that of other marine fish, so their genetic status was good. In addition, the analyisis of genetic relationship showed that E. malabaricus and E. coioides was the closest and it was the farthest between E. merra and E. coioides. 展开更多
关键词 GROUPER EPINEPHELUS Genetic variability species relationships Microsatellite marker
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Neighborhood diversity structure and neighborhood species richness effects differ across life stages in a subtropical natural secondary forest 被引量:1
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作者 Haonan Zhang Shuifei Chen +5 位作者 Xiao Zheng Xiaomin Ge Yao Li Yanming Fang Peng Cui Hui Ding 《Forest Ecosystems》 SCIE CSCD 2022年第6期790-801,共12页
Natural secondary forest has a strong capacity to regrow naturally and recover biodiversity rapidly on abandoned lands.However,at the neighborhood scale,which can truly reflect the facilitative or competitive interact... Natural secondary forest has a strong capacity to regrow naturally and recover biodiversity rapidly on abandoned lands.However,at the neighborhood scale,which can truly reflect the facilitative or competitive interactions among individual plants,the local diversity spatial structure in secondary forest and the feedback effects of neighborhood diversity on natural regeneration remain unclear,and this may be the key to properly understand the mechanisms of natural secondary forest species diversity recovery.To this end,this study established a dynamic plot in a rehabilitated secondary forest after disturbance and conducted a comprehensive survey of 68,336 individual plants with repeated measurements at 5-year interval to assess the characteristics of neighborhood diversity structure across life history stages and link the neighborhood species richness(NSR)effect translated by species interactions at species diversity structure with individual trees recruitment/mortality in secondary forest regeneration.The results showed that,compared with tropical and temperate natural forests,a higher proportion of diversity accumulators and a lower proportion of repellers in subtropical secondary forests resulted in neighborhood diversity structures characterized by heterospecific or high-diversity patches,which are beneficial to the maintenance or restoration of biodiversity.As an important supplement to the research on the relationship between diversity and productivity,our findings show a positive diversity-survival relationship in subtropical secondary forests.Importantly,we observed that the neighborhood diversity structure exhibited a trend of accumulator-dominated to neutral-dominant changes with life stage from sapling to adult,which,in turn,determined the direction and strength of NSR effects on recruitment/mortality.Specifically,diverse local neighborhoods at a later successional stage characterized with‘neutral’species-species interactions can act as a‘welfare net’by offering favorable microhabitats for the most vulnerable recruitments or saplings,i.e.,the NSR effects that promoted individual recruitment/survival in our study.These results not only enrich our understanding of the biodiversity-productivity-survival relationship but also highlight the importance of retaining latesuccessional species of native trees in intensive forest production or in situ conservation policies. 展开更多
关键词 Secondary forest restoration Individual species area relationship Diversity accumulator species Neighborhood species richness effect Life history stages Heterospecific crowding
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Impact of patch size on woody tree species richness and abundance in a tropical montane evergreen forest patches of south India 被引量:1
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作者 Dharmalingam Mohandass Mason J.Campbell Priya Davidar 《Journal of Forestry Research》 SCIE CAS CSCD 2018年第6期1675-1687,共13页
We examined the effects of forest patch size on woody tree species richness and abundance in tropical montane evergreen forest patches of the Nilgiri region,south India. We sampled woody trees(>1 cm dbh) from 21 fo... We examined the effects of forest patch size on woody tree species richness and abundance in tropical montane evergreen forest patches of the Nilgiri region,south India. We sampled woody trees(>1 cm dbh) from 21 forest patches in the upper Nilgiri hills(> 2000 m elevation) and recorded a total of 35,146 individuals of 61 species, 45 genera and 30 families. Species richness and abundance of sapling/shrubs(≥ 1 to < 10 cm dbh)increased significantly with increasing patch size, but the species richness and abundance of small, medium and larger trees(≥ 10 to < 30, ≥ 30 to < 60 and ≥ 60 cm dbh,respectively) did not. Overall, forest interior species richness and abundance increased significantly with increasing patch size but edge species richness did not. Species richness and abundance of shade-tolerant and shade-demanding tree species also increased with increasing patch size. The abundance of zoochory dispersed tree species was significantly related to increasing patch size, but those dispersed by autochory did not display any clear relationship between patch size and species richness or abundance.Our findings suggest that with increasing forest patch area,tree compositional patterns may be driven by species specific shade-tolerance adaptations and dispersal patterns.Differential responses in these traits by the plant community within the individual habitat zones of forest edge and interiors likely plays a major role in determining the inherent plant community and thus the subsequent ecological processes of forest patches, including their responses to increasing patch area. 展开更多
关键词 Dispersal mode Forest fragments SHADE-TOLERANCE species–area relationships Western Ghats
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Area, isolation, disturbance and age effects on species richness of summer waterbirds in post-mining subsidence lakes,Anhui, China 被引量:1
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作者 Jin-Ming Zhao Li-Zhi Zhou 《Avian Research》 CSCD 2018年第1期73-80,共8页
Background: The species–area relationship is one of the best documented patterns in community ecology.Factors influencing species–area relationship are still not well understood.Since the proposal of the equilibrium... Background: The species–area relationship is one of the best documented patterns in community ecology.Factors influencing species–area relationship are still not well understood.Since the proposal of the equilibrium theory of island biogeography, many studies have tested the effects of area and isolation, estimating effects of disturbance and patch age were scarce and should also be important bearing.Methods: We investigated summer waterbird species richness in 38 post?mining subsidence lakes in Huainan and Fuyang, Anhui, China, May 25–June 12, 2016.We examined the effects of lake area, isolation(distance to natural water bodies), aquaculture disturbance, lake age and lake state(still sinking or not sinking) on summer waterbird species richness with multivariable linear regression method and model selection method.Results: Our results from multivariable linear regression and model selection were consistent, which showed that species richness was positively related with lake area and negatively related with isolation.Aquaculture disturbance negatively influenced species richness.Highest species richness were found in lakes under intermediate intensity of aquaculture activities with area less than 100 ha and lakes under low intensity of aquaculture activities with area greater than 100 ha.Lake age and lake state had no significant effects on species richness.Conclusions: Species richness was most related with lake area, aquaculture disturbance, and isolation, with lake area had a positive effect, while aquaculture activities and isolation had a negative effect.What's more, aquaculture activi?ties significantly changed the slope of species–area relationship and might impede us finding a relationship between species richness and lake age. 展开更多
关键词 species–area relationship Aquaculture activity Area size ISOLATION species richness Post-mining subsidence lakes
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Propane dehydro-aromatization reaction over PtFe@S-1 coupling with Zn/ZSM-5 tandem catalysts: the role of Zn species
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作者 Kai Bian Sirui Liu +8 位作者 Huahua Fan Guanghui Zhang Xinwei Zhang Gideon Abaidoo Ocran Mingrui Wang Quanjie Liu Xiaowa Nie Shuandi Hou Xinwen Guo 《Frontiers of Chemical Science and Engineering》 SCIE EI CSCD 2024年第8期25-35,共11页
Unraveling the structure-activity relationship and improving the catalytic performance is paramount in propane dehydro-aromatization reactions. Herein, a tandem catalyst with high propane dehydro-aromatization reactio... Unraveling the structure-activity relationship and improving the catalytic performance is paramount in propane dehydro-aromatization reactions. Herein, a tandem catalyst with high propane dehydro-aromatization reaction performance was prepared via coupling the PtFe@S-1 with Zn/ZSM-5 zeolites (PtFe@S-1&1.0Zn/ZSM-5), which exhibits high dehydrogenation activity, aromatics selectivity (~60% at ~78% propane conversion), and stability. The addition of zinc inhibits the cleavage of C_(6)^(=) intermediates on ZSM-5 and promotes the aromatization pathway by weakening zeolite acid strength, significantly improving the selectivity to aromatics. This understanding of the structure-activity relationship in propane dehydro-aromatization reaction helps develop future high-performance catalysts. 展开更多
关键词 propane dehydro-aromatization reaction tandem catalysts the structure-activity relationship of zinc species
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Impact of great gerbils(Rhombomys opimus) on desert plant communities 被引量:2
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作者 XU Wenxuan LIU Wei +3 位作者 YANG Weikang WANG Muyang XU Feng David BLANK 《Journal of Arid Land》 SCIE CSCD 2015年第6期852-859,共8页
Great gerbil(Rhombomys opimus) colonies, with bare soil and herbaceous plants, are conspicuous to the background environment throughout their range area. In order to quantify the engineer role of great gerbils, we i... Great gerbil(Rhombomys opimus) colonies, with bare soil and herbaceous plants, are conspicuous to the background environment throughout their range area. In order to quantify the engineer role of great gerbils, we investigated the plant communities of 20 active colonies in the Junggar Basin, Xinjiang, China. In areas without disturbance, desert plant communities were dominated by the shrubs with low level species richness. In burrow areas and surrounding intermediate areas, which were disturbed by great gerbils, the shrubs were suppressed with the decrease of vegetation cover and aboveground biomass. As a result, "niche gaps" were created in disturbed areas and worked as a refuge for herbaceous annuals and perennials. So the existence of great gerbils increased the overall species richness of the desert. Furthermore, herbaceous annuals and perennials are the major food source for great gerbils in spring, indicating that great gerbils have a mutually beneficial relationship with herbaceous plants. 展开更多
关键词 Rhombomys opimus ecosystem engineer species richness mutually beneficial relationship
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Copper-ceria sheets catalysts: Effect of copper species on catalytic activity in CO oxidation reaction 被引量:5
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作者 Linying Du Weiwei Wang +5 位作者 Han Yan Xu Wang Zhao Jin Qisheng Song Rui Si Chunjiang Jia 《Journal of Rare Earths》 SCIE EI CAS CSCD 2017年第12期1186-1196,共11页
Copper-ceria sheets catalysts with different loadings of copper(2 wt.%, 5 wt.% and 10 wt.%) supported on ceria nanosheets were synthesized via a depositioneprecipitation(DP) method. The prepared catalysts were sys... Copper-ceria sheets catalysts with different loadings of copper(2 wt.%, 5 wt.% and 10 wt.%) supported on ceria nanosheets were synthesized via a depositioneprecipitation(DP) method. The prepared catalysts were systematically characterized with various structural and textural detections including X-ray diffraction(XRD), Raman spectra, transmission electron microscopy(TEM), X-ray absorption fine structure(XAFS), and temperature-programmed reduction by hydrogen(H2-TPR), and tested for the CO oxidation reaction. Notably, the sample containing 5 wt.% of Cu exhibited the best catalytic performance as a result of the highest number of active CuO species on the catalyst surface. Further increase of copper content strongly affects the dispersion of copper and thus leads to the formation of less active bulk CuO phase, which was verified by XRD and H2-TPR analysis. Moreover, on the basis of in-situ diffuse reflectance infrared Fourier transform spectroscopy(in-situ DRIFTS) results, the surface Cu~+ species, which are derived from the reduction of Cu^(2+), are likely to play a crucial role in the catalyzing CO oxidation.Consequently, the superior catalytic performance of the copper-ceria sheets is mainly attributed to the highly dispersed CuOx cluster rather than Cu-[Ox]-Ce structure, while the bulk CuO phase is adverse to the catalytic activity of CO oxidation. 展开更多
关键词 Ceria nanosheets Copper-ceria catalysts CO oxidation Copper oxide species Structure-properties relationship
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