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| 1 | Effects of litter quality and climate change along an elevational gradient on litter decomposition of subalpine forests, Eastern Tibetan Plateau, China显示文摘Temperature and freeze-thaw events are two key factors controlling litter decomposition in cold biomes.Predicted global warming and changes in freeze-thaw cycles therefore may directly or indirectly impact litter decomposition in those ecosystems. Here, we conducted a2-year-long litter decomposition experiment along an elevational gradient from 3000 to 3600 m to determine the potential effects of litter quality, climate warming and freeze-thaw on the mass losses of three litter types [dragon spruce(Picea asperata Mast.), red birch(Betula albosinensis Burk.), and minjiang fir(Abies faxoniana Rehd. et Wild)]. Marked differences in mass loss were observed among the litter types and sampling dates. Decay constant(k) values of red birch were significantly higher than those of the needle litters. However, mass losses between elevations did not differ significantly for any litter type.During the winter, lost mass contributed 18.3–28.8 % of the net loss rates of the first year. Statistical analysis showed that the relationships between mass loss and litter chemistry or their ratios varied with decomposition periods. Our results indicated that short-term field incubations could overestimate the k value of litter decomposition.Considerable mass was lost from subalpine forest litters during the wintertime. Potential future warming may not affect the litter decomposition in the subalpine forest ecosystems of eastern Tibetan Plateau. | Zhenfeng Xu Jianxiao Zhu Fuzhong Wu Yang Liu Bo Tan Wanqin Yang | 2016 | Journal of Forestry Research2016，27，3： | 6 |
| 2 | Impacts of soil fauna on nitrogen and phosphorus release during litter decomposition were differently controlled by plant species and ecosystem type显示文摘The dynamics of litter nitrogen (N) and phosphorus (P) release could be affected by soil fauna and environmental conditions. The objective of the present study was to investigate the effects of soil fauna on the dynamics of N and P during foliar litter decomposition in three types of ecosystems (i.e., montane forest, ecotone, and dry valley) along an elevation gradient. A field experiment using litterbags with two different mesh sizes (0.04 and 3 mm) was conducted from November 2013 to October 2014. Nitrogen and P release rates in decomposing foliar litter from fir (Abies faxoniana) and birch (Betula albosinensis) in montane forest, oak (Quercus baronii) and cypress (Cupressus chengiana) in ecotone, and cypress and clovershrub (Campylotropis macrocarpa) in dry valley were investigated in the upper reaches of the Yangtze River. Soil fauna strongly affected N and P release across different decomposition periods and ecosystem types. The average release rate of N mediated by soil fauna across the entire year was higher in the dry valley (15.6–37.3%) than in the montane forest (0.5–6.4%) and the ecotone (- 3.7–4.9%). The effects of soil fauna on P release rate were manifest in both the montane forest and the dry valley. Moreover, the impacts of soil fauna can vary substantially among different decomposition periods. Our results indicated that soil fauna can significantly affect N and P release during litter decomposition. The N release rate mediated by fauna was likely to be more sensitive to the effects of plant species (i.e., initial litter chemical traits), while the P release rate mediated by soil fauna might be subject to the effects of local-scale environmental factors (e.g., temperature) to a greater extent. | Yan Peng Wanqin Yang Kai Yue Bo Tan Fuzhong Wu | 2019 | Journal of Forestry Research2019，30，3： | 5 |
| 3 | Preparation of bismuth oxyiodides and oxides and their photooxidation characteristic under visible/UV light irradiation显示文摘 | Changlin Yu Caifeng Fan Jimmy C. Yu Wanqin Zhou Kai Yang | 2010 | Materials Research Bulletin2010，，： | 2 |
| 4 | Loss of total phenols from leaf litter of two shrub species: dual responses to alpine forest gap disturbance during winter and the growing season显示文摘高山森林林窗能够通过调控水热动态进而控制林下生态系统过程。因此,本研究旨在通过两种典型灌木[华西箭竹(Fargeisia nitida(Mitford)Keng f.)和康定柳(Salix paraplesia Schneid.)]凋落叶分解,探索林窗干扰对分解过程中总酚释放的影响。我们在一个典型的岷江冷杉林(Abies faxoniana Rehd.)样地,通过设置不同林窗位置(林窗中心南侧、林窗中心北侧、林缘、扩展林缘和林下)进行了凋落物分解实验;并在两年的不同关键时期:雪被形成期、雪被覆盖期、雪被融化期、生长季节初期和生长季节后期,对两种灌木凋落叶分解袋进行采样,并测试其总酚释放率和微生物丰富度(真菌和细菌)。实验结束后,我们发现,雪被厚度、冻融循环以及真菌细菌比对凋落叶的总酚释放具有显著影响。在两年的雪被形成期、雪被覆盖期、雪被融化期和生长季节后期,真菌和细菌丰富度表现出从林窗中心到林下逐渐降低的趋势,而在两年的生长季节初期,其表现出从林窗中心到林下逐渐增加的趋势。而从不同林窗位置来比较,两种灌木凋落叶的总酚释放率仅在第一年各关键时期表现出同真菌细菌丰富度类似的规律。此外,在第一年的冬季,以及从整个第一年和整个两年分解时间段来看,林窗中心位置两种凋落叶的总酚释放率皆较其他林窗位置高。这些研究结果表明,高山森林林窗的形成能够促进凋落叶总酚的释放,尽管其释放对林窗干扰的响应在不同关键时间具有不同的表现。总之,在高寒生物区,林窗的更替消失以及在气候变化背景下冬季变暖导致的雪被覆盖厚度和持续时间的减少会降低凋落叶总酚的释放率。 | Wei He Wanqin Yang | 2020 | Journal of Plant Ecology2020，13，3： | 1 |
| 5 | Cadmium accumulation and growth responses of a poplar plant( Populus deltoides× Populus nigra ) in cadmium contaminated purple soil and alluvial soil显示文摘 | Wu Fuzhong Yang Wanqin Zhang Jian | 2010 | Journal of Hazardous Materials2010，177，： | 1 |
| 6 | 亚高山森林倒木碳氮磷化学计量特征随林窗位置的变化显示文摘森林林窗对太阳辐射和降水(主要是降雨和降雪)的再分配可造成林窗内外微环境条件的异质性。本研究旨在通过改变微环境,测试林窗对倒木碳(C)、氮(N)和磷(P)化学计量比的影响。在青藏高原东部的亚高山森林中,将I-V腐解等级的岷江冷杉(Abies faxoniana)倒木分别置于林窗中心(GC)、林窗边缘(GE)和郁闭林下(CC)进行原位培养,分别于2013-2016年8月测定了腐烂树皮、边材和心材的C、N、P含量。研究结果表明,树皮N浓度从CC到GC呈下降趋势,而边材和心材则表现出相反的趋势。此外,边材和心材IV、V腐解等级的C/N从CC到GC呈下降趋势,心材V腐解等级的N/P从CC到GC呈增加趋势,这表明森林林窗对高度腐解等级倒木的C/N/P化学计量比有强烈影响。简而言之,高度腐烂的倒木更容易受到微环境的影响,必要时应适当调整郁闭林下或林窗中心的高度腐烂的倒木比例。 | Qin Wang Wanqin Yang Han Li Zhuang Wang Chenhui Chang Rui Cao Bo Tan | 2021 | Journal of Plant Ecology2021，14，4： | 1 |
| 7 | Litter decomposition in two subalpine forests during the freeze–thaw season显示文摘 | Fuzhong Wu Wanqin Yang Jian Zhang Renju Deng | 2009 | Acta Oecologica2009，，1： | 1 |
| 8 | Hydrothermal synthesis of hemisphere-like F-doped anatase TiO2 with visible light photocatalytic activity显示文摘 | Changlin Yu Wanqin Zhou Kai Yang | 2010 | J Mater Sci2010，45，： | 1 |
| 9 | Hydrothermal synthesis of hemisphere-like F-doped anatase TiO2 with visible light photocatalytic activity显示文摘 | Changlin Yu Wanqin Zhou Kai Yang Gan Rong | 2010 | Journal of Materials Science2010，，21： | 1 |
| 10 | Soil C, N and P stocks and stoichiometry under different vegetation on the surface of the Leshan Giant Buddha显示文摘The accumulation of soil organic matter and nutrients is an important pathway in effectivelyunderstanding the mechanisms of plant settlement and rock weathering, while the characteristics ofsoil organic carbon (C), nitrogen (N) and phosphorus (P) under different vegetation remain unclear.In this study, the stocks and stoichiometry of soil organic C, N and P were determined in differentpositions and types of vegetation on the surface of the Leshan Giant Buddha. We found that the totalstocks of soil organic C, N and P were 1689.77, 134.6 and 29.48 kg, respectively, for the Buddha.The stocks of soil organic C, N and P under vascular plants were higher than those under othervegetation, with highest values observed under herb. Higher stocks per unit area (m2) of soil organicC, N and P were found on the left and right arms, shoulders, and two platforms. These results providea full primary picture in understanding soil organic C, N and P accumulation and distribution on thesurface of the Buddha, which could supply the fundamental data on weathering management of theBuddha and other similar open-air stone carvings. | Fujia Wu Wanqin Yang Bo Sun Tianyu Yang Xuli Chen Zhenfeng Xu Huixing Song | 2022 | Soil Ecology Letters2022，4，1： | 1 |
| 11 | Cumulative cellulolytic enzyme activities and initial litter quality in prediction of cellulose degradation in an alpine meadow of the eastern Tibetan Plateau显示文摘植物凋落物分解是决定陆地生态系统碳和养分循环的关键生态系统过程。作为凋落物的主要组成部分,纤维素是与凋落物分解相关的微生物的重要能量来源。纤维素酶在凋落物纤维素降解过程中的重要作用已为人们所熟知,然而纤维素降解的季节模式、累积酶活性和凋落物质量是否能预测高寒草甸的纤维素降解仍是一个未解之谜,这限制了我们对草本植物凋落物纤维素降解的认识。为了探究纤维素降解的季节性模式以及累积纤维素分解酶活性和凋落叶初始质量对纤维素降解的影响,我们在青藏高原东部的高山草甸选取了三种优势种[圆叶筋骨草(Ajuga ovalifolia)、藏羊茅(Festuca wallichanica)和草甸马先蒿(Pedicularis roylei)],进行了为期两年的凋落物网袋分解实验。我们的研究发现,纤维素在第一年中迅速降解且降解率超过50%,而且主要发生在第一个生长季(31.9%-43.3%)在两年的分解过程中,纤维素降解由累积内切葡聚糖酶(R^(2)=0.70),累积纤维二糖水解酶(R^(2)=0.59)和累积1,4-β-葡糖苷酶(R^(2)=0.57)共同驱动。此外,在这两年的分解过程中,纤维素、可溶性有机碳、总酚、木质素的浓度和木质素/N可以解释纤维素降解变异的(52%-78%)。用初始纤维素浓度模型预测纤维素降解效果最佳(R^(2)=0.78)。在凋落物的分解过程中,酶效率和微生物对纤维素分解酶的分配因物种而异。藏羊茅凋落物中纤维素酶效率较高,但质量相对较低。与草甸马先蒿相比,完全降解圆叶筋骨草和藏羊茅的纤维素需要4倍和6.7倍的内切葡聚糖酶、3倍和4.5倍的纤维二糖水解酶、1.2倍和1.4倍的1,4-β-葡糖苷酶。我们的研究结果表明,虽然微生物酶活性和凋落物初始质量都对高山草甸纤维素降解有显著影响,但使用纤维素浓度来预测纤维素降解是简化凋落物分解过程中纤维素降解和C循环模型的好方法。 | Yamei Chen Yang Liu Jian Zhang Wanqin Yang Changchun Deng Runlian He | 2020 | Journal of Plant Ecology2020，13，1： | 1 |
| 12 | Changes in plant debris and carbon stocks across a subalpine forest successional series显示文摘Background:As a structurally and functionally important component in forest ecosystems,plant debris plays a crucial role in the global carbon cycle.Although it is well known that plant debris stocks vary greatly with tree species composition,forest type,forest origin,and stand age,simultaneous investigation on the changes in woody and non-woody debris biomass and their carbon stock with forest succession has not been reported.Therefore,woody and non-woody debris and carbon stocks were investigated across a subalpine forest successional gradient in Wanglang National Nature Reserve on the eastern Qinghai-Tibet Plateau.Results:Plant debris ranged from 25.19 to 82.89 Mg∙ha−1 and showed a global increasing tendency across the subalpine forest successional series except for decreasing at the S4 successional stage.Accordingly,the ratios of woody to non-woody debris stocks ranged from 26.58 to 208.89,and the highest and lowest ratios of woody to non-woody debris stocks were respectively observed in mid-successional coniferous forest and shrub forest,implying that woody debris dominates the plant debris.In particular,the ratios of coarse to fine woody debris stocks varied greatly with the successional stage,and the highest and lowest ratios were found in later and earlier successional subalpine forests,respectively.Furthermore,the woody debris stock varied greatly with diameter size,and larger diameter woody debris dominated the plant debris.Correspondingly,the carbon stock of plant debris ranged from 10.30 to 38.87 Mg∙ha−1 across the successional series,and the highest and lowest values were observed in the mid-coniferous stage and shrub forest stage,respectively.Most importantly,the carbon stored in coarse woody debris in later successional forests was four times higher than in earlier successional forests.Conclusions:The stock and role of woody debris,particularly coarse woody debris,varied greatly with the forest successional stage and dominated the carbon cycle in the subalpine forest ecosystem.Thus,preserving coarse woody debris is a critical strategy for sustainable forest management. | Zhihui Wang Lianjun Zhao Yi Bai Fei Li Jianfeng Hou Xuqing Li Yurui Jiang Yuyue Deng Bingqian Zheng Wanqin Yang | 2021 | Forest Ecosystems2021，8，3： | 0 |
| 13 | 中国东北地区流动沙丘生态系统丘间低地地下芽库的时空变化显示文摘地下芽库在半干旱区沙丘生态系统植被恢复中起着重要作用。然而,目前针对流动沙丘丘间低地地下芽库时空变化的研究却很少。本研究通过调查一个生长季内5个不同面积流动沙丘丘间低地地下芽库的大小和组成,确定流动沙丘丘间低地地下芽库的时空变化。研究结果显示,中等面积丘间低地的总芽库密度与分菓芽密度最高,茎基部芽密度呈相反趋势,而根茎芽密度不随丘间低地的面积变化而变化。地下芽库大小具有明显的季节变化特征。总芽密度在8月份达到高峰,10月份最低,根茎芽密度变化趋势与总芽密度相似,而茎基芽密度变化趋势与总芽密度相反,分菓芽密度的变化不明显。以上结果表明,地下芽库密度随丘间低地的面积和季节变化而变化。这一结果有助于认识流动沙丘生态系统中植物生长的适应策略,并可为半干旱区沙丘植被恢复和保护提供理论指导。 | Jing Wu Jianqiang Qian Quanlai Zhou Wanqin Yang Zhimin Liu | 2021 | Journal of Plant Ecology2021，14，1： | 0 |
| 14 | Nitrous oxide emissions from three temperate forest types in the Qinling Mountains,China显示文摘To understand soil N2O fluxes from temperate forests in a climate-sensitive transitional zone,N2O emissions from three temperate forest types(Pinus tabulaeformis,PTT;Pinus armandii,PAT;and Quercus aliena var.acuteserrata,QAT)were monitored using the static closed-chamber method from June 2013 to May 2015 in the Huoditang Forest region of the Qinling Mountains,China.The results showed that these three forest types acted as N2O sources,releasing a mean combined level of 1.35±0.56 kg N2O ha^-1 a^-1,ranging from0.98±0.37 kg N2O ha^-1 a^-1 in PAT to 1.67±0.41 kg N2O ha^-1 a^-1 in QAT.N2O emission fluctuated seasonally,with highest levels during the summer for all three forest types.N2O flux had a significantly positive correlation with soil temperature at a depth of 5 cm or in the water-filled pore space,where the correlation was stronger for temperature than for the water-filled pore space.N2O flux was positively correlated with available soil nitrogen in QAT and PAT.Our results indicate that N2O flux is mainly controlled by soil temperature in the temperate forest in the Qinling Mountains. | Wei Xue Changhui Peng Huai Chen Hui Wang Qiuan Zhu Yanzheng Yang Junjun Zhang Wanqin Yang | 2019 | Journal of Forestry Research2019，30，4： | 0 |
| 15 | Effects of forest canopy density and epixylic vegetation on nutrient concentrations in decaying logs of a subalpine fir forest显示文摘Background:Deadwood and the associated epixylic vegetation influence nutrient cycles in forest ecosystems.Open canopies strongly regulate deadwood decomposition and disrupt epixylic vegetation on logs.However,it is unclear how the forest canopy density and epixylic vegetation growth affect the nutrient concentrations in deadwood.Methods:We measured the concentrations of nitrogen(N),phosphorus(P),potassium(K),calcium(Ca),sodium(Na),magnesium(Mg),and manganese(Mn)in experimentally exposed decaying logs placed in gaps,at the edge of gaps,and under the closed canopy during a four-year decomposition experiment in a Subalpine Faxon fir forest(Abies fargesii var.faxoniana)on the eastern Qinghai-Tibetan Plateau,China.To assess the effect of the epixylic vegetation,we experimentally removed it from half of the logs used in the study.Results:Under open canopy conditions in the gap and at the edge,the concentrations for most of the nutrients in the bark and the highly decayed wood were lower than under the closed canopy.The effect of the epixylic treatment on nutrient concentrations for all but K and Na in barks varied with the decay classes.Significantly lower concentrations of N,P,Ca,and Mn following the removal of epixylic vegetation were observed in the wood of decay class IV.Epixylic vegetation significantly increased most nutrient concentrations for decaying barks and wood under open canopy conditions.In contrast,epixylic vegetation had no or minimal effects under the closed canopy.Conclusions:Forest canopy density and epixylic vegetation significantly alter the nutrient concentrations in decaying logs.Open canopies likely accelerate the rate of nutrient cycling between the epixylic vegetation and decaying logs in subalpine forests. | Zhuang Wang Wanqin Yang Bo Tan Qin Wang Lifeng Wang Chenhui Chang Rui Cao Yurui Jiang Jörg Müller | 2022 | Forest Ecosystems2022，9，5： | 0 |
| 16 | Variations in root chemistry of three common forest species,southwestern China显示文摘Root chemistry varies with tree species and root diameter but little information is available about Tibetan forest species. The root chemistry of three root diameter classes (fine: 0–2 mm, medium: 2–5 mm, coarse: 5–10 mm) of three subalpine species (Abies faxoniana Rehd. and Wild, Picea asperata Mast., and Betula albosinensis Burkill) were investigated. Carbon concentrations, and carbon/nitrogen and carbon/phosphorus ratios increased but nitrogen, phosphorus and nitrogen/phosphorus ratios decreased with increasing root diameter. The roots of the conifers had higher carbon levels, and higher carbon/nitrogen and carbon/phosphorus ratios than birch roots. The opposite was found with nitrogen and phosphorus levels and nitrogen/phosphorus ratios. Lignin concentrations decreased but cellulose concentrations increased with greater root diameters. The results indicate that diameter-associated variations in root chemistry may regulate their contribution to detrital pools which has important implications for below-ground carbon and nutrient cycles in these subalpine forests. | Qun Liu Wanqin Yang Fuzhong Wu Bo Tan Li Zhang Zhenfeng Xu | 2019 | Journal of Forestry Research2019，30，3： | 0 |
| 17 | Forecast of Exploration Potential and Reserves Growth in Jiyang Depression显示文摘Jiyang Depression,located in northern Shandong Province,is part of the Bohai Bay Basin of Sino-Korean platform,with the exploration acreage being 35,696 square kilometers.It consists of Dongying,Zhanhua,Chezhen,and Huimin sags and the beach area,73 oil and gas fields have been discovered here.After drilling the first commercial oil flow in Hua-8 well in 1961,exploration in Jiyang Depression has been carried out for 49 years yet.By the end of 2008,3D seismic exploration had been carried out in 50.4% of the Depression,there were 0.22 exploratory well and and 0.07 wildcat per square kilometer separately. | Yang Wanqin | 2010 | China Oil & Gas2010，17，4： | 0 |
| 18 | Effects of Seasonal Freeze-Thaw Cycles on Quantity of Soil Microbes in Subalpine Fir Forest显示文摘Fir(Abies faxoniana) distributes widely in the alpine and subalpine region of western Sichuan.To understand effects of freeze-thaw events on soil microbial community,microbial number was investigated monthly in a fir forest,employing the method of lab freeze/thaw cycles in combination with field soil sampling.Bacterial and actinomycete number in soil decreased and fungal count increased after a seasonal freeze-thaw season cycle.Bacterial and fungal counts increased with the decreased altitude,while actinomycete count decreased with the decreased altitude.Different microbes had various change patterns with altitude in humus layer(AL), illuvial layer(BL) and parent material layer(CL). Compared with the 3 582 m altitude,bacterial count in the AL and CL at the 3 298 m altitude increased 4.2%and 7.0%,respectively,but that in the BL decreased 0.6%.Meanwhile,bacterial count increased 11.5%,3.5%and 2.1%in the AL,BL and CL at the 3 023 m altitude in comparison with the 3 298 m altitude,respectively.Fungi count in the AL,BL and CL increased by 10.5%,10.3%and 16.4%at the 3 298 m altitude in comparison with 3 582 m altitude,respectively,while it increased by 2.4%,1.7%and 3.5%at the 3 023 m altitude in comparison with 3 298 m altitude,respectively. Actinomycete count in the AL at the 3 298 m altitude increased by 0.7%than that at the 3 582 m altitude, but decreased 5.9%and 13.9%in the BL and CL.In the AL and BL,it increased 5.2%and 5.2% respectively at the 3 023 m altitude than that at the 3 298 m altitude,while in the CL it decreased 12.4%.These results were in agreement with the simulation freeze/thaw cycle experiment in lab.The results also revealed that the seasonal freeze-thaw cycle increased the ratio of soil fungi to bacteria. These results demonstrated that different microbial groups responded differentially to the seasonal freeze-thaw cycle,which may be an important ecological mechanism for maintaining the seasonal frozen ecosystem. | Wang Huaiyu Yang Wanqin | 2012 | Chinese Forestry Science and Technology2012，11，3： | 0 |
| 19 | Micro-sized hydrothermal carbon supporting metal oxide nanoparticles as efficient catalyst for mono-dehydration of sugar alcohol显示文摘Most known catalytic dehydration of sugar alcohols such as D-sorbitol and D-mannitol can only produce di-dehydrated forms as major product,but monodehydrated products are also useful chemicals.Moreover,both di-and mono-dehydration demand a high temperature(150℃ or higher),which deserves further attentions.To improve the mono-dehydration efficiency,a series of metal-containing hydrothermal carbonaceous materials(HTC)are prepared as catalyst in this work.Characterization reveals that the composition of preparative solution has a key influence on the morphology of HTC.In transformation of D-sorbitol,all HTC catalysts show low conversions in water regardless of temperature,but much better outputs are obtained in ethanol,especially at a higher temperature.When D-mannitol is selected as substrate,moderate to high conversions are obtained in both water and ethanol.On the other hand,high mono-dehydration selectivity is obtained for both sugar alcohols by using all catalysts.The origin of mono-dehydration selectivity and role of carbon component in catalysis are discussed in association with calculations.This study provides an efficient,mild,eco-friendly,and cost-effective system for mono-dehydration of sugar alcohols,which means a lot to development in new detergents or other fine chemicals. | Cheng PAN Chao FAN Wanqin WANG Teng LONG Benhua HUANG Donghua ZHANG Peigen SU Aqun ZHENG Yang SUN | 2022 | Frontiers in Energy2022，16，5： | 0 |
| 20 | Preface to Special Issue of Membranes and Membrane Processes based on Confined Mass Transfer显示文摘Membrane separation is playing an increasingly critical role indiverse fields as a cost-efficient and energy-economic technology. Ultra-filtration and microfiltration based on the size-sieving mechanismof macroporous media have been clearly elucidated using classicaltheories of mass transfer. However, membrane processes includingpervaporation, gas separation, ion exchange, nanofiltration, reverseosmosis, etc., mainly involve mass transfer in narrow spaces whosesizes are comparable to the free distances of molecules mobility. | Wanqin Jin Chao Yang | 2017 | Chinese Journal of Chemical Engineering2017，25，11： | 0 |
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