Speciation, leachability, and phytoaccessibility of heavy metals during thermochemical liquefaction of contaminated peanut straw
作者：
Zheng, Xiaochen;Zou, Dongsheng;Wu, Qingdan;Zhang, Liqing;Tang, Jialong;...
期刊：
Waste Management ,2024年176:20-29 ISSN：0956-053X
通讯作者：
Xiao, ZH
作者机构：
[Xiao, Zhihua; Wu, Qingdan; Liu, Fen; Zheng, Xiaochen; Xiao, ZH; Zou, Dongsheng; Tang, Jialong] Hunan Agr Univ, Coll Environm & Ecol, Changsha 410128, Hunan, Peoples R China.;[Xiao, Zhihua; Wu, Qingdan; Liu, Fen; Zheng, Xiaochen; Zou, Dongsheng; Tang, Jialong] Key Lab Rural Ecosyst Hlth Dongting Lake Area Huna, Changsha 410128, Peoples R China.;[Zhang, Liqing] Moutai Inst, Renhuai 564507, Guizhou, Peoples R China.;[Liu, Fen] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Xiao, ZH ] H;Hunan Agr Univ, Coll Environm & Ecol, Changsha 410128, Hunan, Peoples R China.
关键词：
Carbon neutrality;Environmental risk;Ethanol;Oilseed crop;Phytoremediation;Thermal treatment
摘要：
In this study, the speciation, leachability, phytoaccessibility, and environmental risks of heavy metals (Cd, Zn, and Cu) during liquefaction of contaminated peanut straw in ethanol at different temperatures (220, 260, 300, 340, and 380 degrees C) were comprehensively investigated. The results showed that elevated temperatures facilitated heavy metal accumulation in the biochar. The acid-soluble/exchangeable and reducible fraction percentages of heavy metals were substantially reduced in the biochar after liquefaction as the temperature increased, and the oxidizable fraction became the dominant heavy metal fraction, accounting for 44.14-78.67%. Furthermore, although an excessively high liquefaction temperature (380 degrees C) increased the residual fraction percentages of Zn and Cu, it was detrimental to Cd immobilization. The acid-soluble/exchangeable Cd in the contaminated peanut straw readily migrates to the bio-oil during liquefaction, with the highest concentration of 1.60 mg/kg at 260 degrees C liquefaction temperature, whereas Zn and Cu are predominantly bound to the unexchangeable fraction in the bio-oil. Liquefaction inhibited heavy metal leachability and phytoaccessibility in biochar, the lowest extraction rates of Cd, Zn, and Cu were 0.71%, 1.66% and 0.95% by diethylenetriamine pentaacetic acid, respectively. However, the leaching and extraction concentrations increased when the temperature was raised to 380 degrees C. Additionally, heavy metal risk was reduced from medium and high risk to no and low risk. In summary, liquefaction reduces heavy metal toxicity and the risks associated with contaminated peanut straw, and a temperature range of 300-340 degrees C for ethanol liquefaction can be considered optimal for stabilizing heavy metals.
语种：
英文
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Hydrological regime change and its ecological responses in East Dongting Lake, China
作者：
Gao, Ye;Xie, Yong-hong* ;Zou, Dong-sheng
期刊：
Ecohydrology & Hydrobiology ,2020年20(1):142-150 ISSN：1642-3593
通讯作者：
Xie, Yong-hong
作者机构：
[Gao, Ye; Zou, Dong-sheng] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha, Peoples R China.;[Gao, Ye] Hydrol & Water Resources Survey Bur Hunan Prov, Changsha, Peoples R China.;[Xie, Yong-hong] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha, Peoples R China.;[Xie, Yong-hong] Chinese Acad Sci, Inst Subtrop Agr, Dongting Lake Stn Wetland Ecosyst Observat & Res, Yueyang, Peoples R China.
通讯机构：
[Xie, Yong-hong] C;Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha, Peoples R China.;Chinese Acad Sci, Inst Subtrop Agr, Dongting Lake Stn Wetland Ecosyst Observat & Res, Yueyang, Peoples R China.
关键词：
Dongting Lake;East;Ecological response;Hydrological regime change;Three Gorges Dam
摘要：
Extent, frequency and duration of lake water level fluctuations (WLF) are dominant forces controlling the functioning of lake ecosystems, especially in the lake's littoral and aquatic-terrestrial interface processes. In East Dongting Lake, Carex life history synchronize the arrival of overwintering birds, Carex meadow provide vital wintering ground for migratory waterbirds, especially for the Lesser White-fronted Geese. However, significant changes had taken place in the hydrological regime of East Dongting Lake and our research showed it caused chiefly by sediment deposition in the lake basin and the replenishment of the Three Gorges Dam. The annual lowest water level of the East Dongting Lake had gradually risen and the annual water level amplitude had decreased obviously over the past 60 years. Since the operation of the Three Gorges Dam, the average water level increased significantly from January to June. The Three Gorges Dam holder the incoming water from late September to late October that the status will change from flood control limited water level to normal water level, meanwhile the water level of East Dongting Lake declined significantly through the same duration, especially in October. The operation of the Three Gorges Dam decreased flooding days in the areas above 22-m elevation, resulting in lowering of the minimum elevation of vegetation-covered area and synchronous downward movement of vegetation distribution pattern. As the timing of water level recession at elevations of 24-27 m were 12, 17, 19 and 16 days earlier than that in 1981-2002, the optimum elevation for Carex growth decreased from 25-26 m to 24-25 m. After the operation of the Three Gorges Dam, the annual reversal times of water level increased significantly, which is not conducive to the formation of stable habitat and the utilization of resources by organisms. (C) 2019 European Regional Centre for Ecohydrology of the Polish Academy of Sciences. Published by Elsevier B.V. All rights reserved.
语种：
英文
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三峡工程运行前后荆江三口水文情势的变化
作者：
高耶;谢永宏;邹冬生
期刊：
长江流域资源与环境 ,2020年29(2):479-487 ISSN：1004-8227
作者机构：
[高耶] 湖南农业大学生物科学技术学院,湖南长沙410128;[高耶] 湖南省水文水资源勘测局,湖南长沙410007;中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,湖南长沙410125;中国科学院亚热带农业生态研究所洞庭湖湿地生态系统观测研究站,湖南岳阳414018;[谢永宏] 中国科学院亚热带农业生态研究所
关键词：
三峡工程;荆江三口;水文情势
摘要：
基于1980 ~ 2015年荆江三口五站逐日流量数据,采用IHA指标体系分析度量三峡工程运行前后荆江三口水文情势的变化。除新江口和弥陀寺在枯水期1 ~ 3月有小幅增长外,三口各站点月均流量值均减小,汛期下降幅度较大。最大日流量值持续下降,但2003年后变化趋势相对平缓。沙道观和管家铺站断流天数显著上升,各站流量变化率明显降低。荆江三口水文情势变化受长江干流径流量减少、径流过程改变以及干流与口门河段河道冲淤不一致的共同影响,对长江中游四大家鱼种群以及洞庭湖苔草草洲的发展产生一定负面作用。
语种：
中文
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基于五种模型比较的湖南省生态旅游需求预测研究
作者：
邹伏霞;邹冬生
期刊：
长江流域资源与环境 ,2020年29(11):2406-2416 ISSN：1004-8227
作者机构：
湖南农业大学生物科学技术学院,湖南长沙 410128;湖南农业大学生态经济研究所,湖南长沙 410128;[邹伏霞; 邹冬生] 湖南农业大学
关键词：
生态旅游;需求预测;生态旅游需求;生态旅游需求预测
摘要：
从供求关系视角对湖南省生态旅游需求预测有利于生态旅游资源的优化配置与生态旅游产业的可持续发展.为了进一步了解湖南省生态旅游市场需求,以2008～2017年生态旅游相关数据为样本数据,运用GM(1,1)预测模型、线性回归预测模型、非参数模型、BP神经网络预测模型、时间序列预测模型(2)五种预测模型对湖南省生态旅游需求进行预测,得到线性回归模型的模拟精度最高.因此,采用线性回归模型对湖南省生态旅游总收入和生态接待旅游总人数进行预测.结果显示:2021～2025年期间,湖南省生态旅游总收入和接待生态旅游总人数呈中低速曲线递增趋势,其中生态旅游总收入名列前5强的市州是长沙、张家界、岳阳、湘潭和益阳市;生态旅游接待人数名列前5强的市州是长沙、常德、衡阳、郴州、益阳市.在各市州之间,存在生态旅游总收入与生态旅游人数不对等现象,尤以常德和张家界两市最为典型.
语种：
中文
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Remediation of cadmium-contaminated soils using Brassica napus: Effect of nitrogen fertilizers.
作者：
Zeng, Xinyi;Zou, Dongsheng;Wang, Andong;Zhou, Yaoyu;Liu, Yihan;...
期刊：
Journal of Environmental Management ,2020年255:109885 ISSN：0301-4797
通讯作者：
Xiao, Zhihua
作者机构：
[Zeng, Xinyi; Liu, Yihan; Xiao, Zhihua; Wang, Andong; Liu, Fen; Li, Zihan; Zou, Dongsheng; Wang, Hua] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.;[Zhou, Yaoyu; Zeng, Qingru] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Zeng, Xinyi; Liu, Yihan; Xiao, Zhihua; Zeng, Qingru; Wang, Andong; Liu, Fen; Li, Zihan; Zou, Dongsheng; Wang, Hua] Key Lab Rural Ecosyst Hlth Dongting Lake Area Hun, Changsha 410128, Peoples R China.;[Zeng, Xinyi; Liu, Yihan; Xiao, Zhihua; Wang, Andong; Liu, Fen; Li, Zihan; Zou, Dongsheng; Wang, Hua] Hunan Engn Lab Pollut Control & Waste Utilizat Sw, Changsha 410128, Peoples R China.
通讯机构：
[Xiao, Zhihua] H;Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.
关键词：
Alkalinity;Bioremediation;Cadmium;Calcium compounds;Contamination;Crops;pH;Soil pollution;Soil pollution control;Alkalines;Cd concentrations;Cd-contaminated soils;Contaminated soils;N fertilizers;Oil crops;Physico-chemicals;Physicochemical characteristics;Phytoremediation;Rhizospheres soil;Soils;cadmium;nitrogen fertilizer;cadmium;fertilizer;nitrogen;bioaccumulation;cadmium;canola;concentration (composition);contaminated land;heavy metal;organic acid;pH;physicochemical property;phytoremediation;rhizosphere;soil reinforcement;soil remediation;vegetable;Article;bioaccumulation;loam soil;nonhuman;physical chemistry;phytoremediation;rapeseed;rhizosphere;shoot;soil acidity;soil;soil pollutant;Brassica napus;Brassica napus;Cadmium;Fertilizers;Nitrogen;Soil;Soil Pollutants
摘要：
The physico-chemical characteristics of N fertilizers remain poorly understood with respect to their use with rape (Brassica napus L.) to remediate Cd-contaminated soil. In this work, eight types of fertilizer (comprising physico-chemical alkaline, neutral, and acidic N fertilizers) were employed to assess the effect of soil remediation via rape at different levels of Cd contamination (0, 5, and 10 mg kg−1 Cd). The results show that the pH of rhizosphere soils was significantly higher under physico-chemical alkaline N fertilizer treatments than under physico-chemical acidic and neutral N fertilizer treatments. The physico-chemical characteristics of N fertilizers affected the rhizosphere soil pH and promoted Cd phytoextraction and accumulation by rape. In the 5 mg kg−1 Cd-contaminated soil, the Cd accumulation and bioconcentration factor value in the shoots and the Cd translocation factor value were highest with the addition of NH4Cl, a physico-chemical acidic N fertilizer. Among the physico-chemical alkaline N fertilizers, Ca(NO3)2 enabled the highest accumulation of Cd in rape shoots when soil was contaminated with 10 mg kg−1 Cd. Thus, administering physico-chemical acidic N fertilizer to soils with lower Cd concentrations provides better remediation effects by rape, whereas physico-chemical alkaline N fertilizers are more effective in soils with higher Cd concentrations. These results show that physico-chemical N fertilizers can be employed to enhance the remediation of Cd-contaminated soil by rape and simultaneously improve the yield of this crop, with implications for environmental health and sustainable agricultural development. © 2019 Elsevier Ltd
语种：
英文
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桉树凋落物对土壤微生物群落的影响:基于控制实验研究
作者：
陈法霖;张凯;向丹;吴爱平;李有志;...
期刊：
土壤学报 ,2019年56(2):432-442 ISSN：0564-3929
通讯作者：
Zheng, H.
作者机构：
[吴爱平; 邹冬生; 李有志] Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China;[郑华] State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;[张凯] College of Grassland and Environment Sciences, Xinjiang Agricultural University, Urumqi, 830052, China;[向丹] College of Resources and Environment, Qingdao Agricultural University, Qingdao，Shandong266109, China;[陈法霖] Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China, State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
通讯机构：
[Zheng, H.] S;State Key Laboratory of Urban and Regional Ecology, China
关键词：
桉树;天然次生林;凋落物;土壤微生物
摘要：
全面认识桉树种植对土壤微生物群落结构和功能的影响及机制,对于阐明单一物种对生态系统服务功能的影响具有重要意义。通过室内小盆模拟控制试验,采用随机区组设计,以土壤碳、氮含量有显著差异的3种天然次生林土壤为对象,以不添加凋落物的处理和添加天然次生林混合凋落物的处理为对照,研究桉树凋落物对土壤微生物群落结构及功能的影响。结果表明:(1)与天然次生林的混合凋落物相比,桉树凋落物具有较高的碳含量和较低的氮含量,其碳氮比也较高;(2)添加桉树凋落物的土壤中细菌、真菌、放线菌以及磷脂脂肪酸的总丰度显著高于不添加凋落物的土壤,但是显著低于添加天然次生林混合凋落物的土壤,并且不同凋落物处理下土壤微生物群落的磷脂脂肪酸组成存在显著差异;(3)不同凋落物处理下土壤微生物群落的碳代谢方式差异显著,添加桉树凋落物的土壤微生物群落的碳代谢功能优于未添加凋落物的处理,但是显著低于天然次生林混合凋落物处理的土壤,包括:碳代谢的活性和多样性。综上所述,与天然次生林本身的凋落物相比,桉树凋落物影响下的土壤微生物群落的生物量、多样性和代谢活性均较低,表明桉树凋落物为土壤微生物群落提供生境和食物的能力较弱。
语种：
中文
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基于Geodetector的广西喀斯特植被覆盖变化及其影响因素分析
作者：
刘大元;张雪梅;岳跃民;王克林;邹冬生
期刊：
农业现代化研究 ,2019年40(6):1038-1047 ISSN：1000-0275
作者机构：
湖南农业大学生物科学技术学院, 湖南, 长沙, 410125;中国科学院亚热带农业生态研究所, 中国科学院亚热带农业生态过程重点实验室, 湖南, 长沙, 410125;中国科学院环江喀斯特生态系统观测研究站, 中国科学院环江喀斯特生态系统观测研究站, 广西, 环江, 547100;[岳跃民; 王克林; 张雪梅] 中国科学院亚热带农业生态研究所;[刘大元; 邹冬生] 湖南农业大学
关键词：
喀斯特生态系统;植被变化;自然因素;社会经济条件;地理探测器
摘要：
广西喀斯特地区生态环境脆弱,植被退化严重,石漠化问题突出。随着一系列生态保护与建设措施的实施,广西植被已逐渐恢复,石漠化面积扩张趋势已得到控制。深入了解广西植被覆盖演变特征及其主导因素可为新一轮石漠化治理工程实施提供科学依据。本研究基于1982—2015年GIMMS NDVI3g生长季NDVI （the growing season GSN）数据和1982—2016年AVHRR VCF数据,分析广西植被时空变化特征,同时结合气候、土壤以及人类活动等因素,运用地理探测器模型,探究自然和人文因素对区域尺度植被覆盖变化影响的空间差异。结果表明,1982—2015年广西植被,尤其是林地面积比例呈增加趋势,裸地面积比例呈减少趋势;广西北部、西北部的植被覆盖显著高于广西中部和东南部经济活动较强的区域;影响植被变化的综合因素主要包括交通通达度、气候条件、社会经济条件和土壤养分等,其中,社会经济条件对植被和裸地空间分异的解释率分别为20.49%和21.27%,其次为交通通达度、气候条件和土壤养分;植被与裸地在空间上呈显著负相关（R=-0.65,P<0.01）,社会经济发展水平是影响植被和裸地空间分布的主导因素。
语种：
中文
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Multiple stabilizing pathways in wetland plant communities subjected to an elevation gradient
作者：
Fu, Hui* ;Yuan, Guixiang;Jeppesen, Erik;Ge, Dabing;Zou, Dongsheng;...
期刊：
Ecological Indicators ,2019年104:704-710 ISSN：1470-160X
通讯作者：
Fu, Hui
作者机构：
[Wu, Aiping; Ge, Dabing; Liu, Qiaolin; Zou, Dongsheng; Fu, Hui; Yuan, Guixiang] Hunan Agr Univ, Hunan Prov Key Lab Rural Ecosystem Hlth Dongting, Coll Biosci & Biotechnol, Ecol Dept, Changsha 410128, Hunan, Peoples R China.;[Lou, Qian; Dai, Taotao; Zhong, Jiayou; Fu, Hui; Yuan, Guixiang] Jiangxi Inst Water Sci, Beijing East Rd 1038, Nanchang 330029, Jiangxi, Peoples R China.;[Jeppesen, Erik] Aarhus Univ, Dept Biosci, Vejlsovej 25, DK-8600 Silkeborg, Denmark.;[Li, Wei] Nanchang Inst Technol, Res Inst Ecol & Environm Sci, Nanchang 330099, Jiangxi, Peoples R China.;[Huang, Zhenrong] Chinese Acad Sci, Inst Subtrop Agr, Changsha Res Stn Agr & Environm Monitoring, Key Lab Agroecol Proc Subtrop Reg, Beijing 410125, Hunan, Peoples R China.
通讯机构：
[Fu, Hui] H;Hunan Agr Univ, Hunan Prov Key Lab Rural Ecosystem Hlth Dongting, Coll Biosci & Biotechnol, Ecol Dept, Changsha 410128, Hunan, Peoples R China.
关键词：
Elevation gradients;Insurance effect;Selection effects;Species diversity;Stability
摘要：
Understanding how ecological processes mediate community stability as a response to variation in the environment is a central goal in ecology. Four biotic mechanisms – portfolio, selection, insurance, and over-yielding effects – have been suggested to control community stability. While the significance of each of these mechanisms is debated, few studies have elucidated changes in their relative importance along environmental gradients. We used six years of field observations from a natural assembled wetland plant community to explore how stability changed directly or indirectly along an elevation gradient. All four mechanisms mentioned above contributed significantly to the variation in temporal stability (totally 94%), with selection and insurance effects being most important. Generalized multilevel path modelling indicates that the four mechanisms destabilize individual populations and functional groups, even though they have significant stabilizing effects on community productivity. The modelling also suggests that community dominance rather than species diversity largely mediate the indirect effects of elevation on community stability. Increasing elevation indirectly affects stability through changes in community dominance, synchrony, and abundance. Although no significant responses of species diversity were found along elevation gradients, species diversity apparently controlled stability both directly and indirectly through changes in community dominance, synchrony, and abundance. Our study illustrates that understanding the multivariate chains linking the direct, indirect, and interactive effects of elevation gradients on plant communities may help clarifying complex biotic stability mechanisms. © 2019 Elsevier Ltd
语种：
英文
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专业认知度调查及专业导论课程的改革探讨——以湖南农业大学生态学专业为例
作者：
梁运姗;孙文笑;曾洪;张学文;方俊;...
期刊：
科教文汇(下旬刊) ,2019年(24):64-67 ISSN：1672-7894
作者机构：
湖南农业大学生物科学技术学院洞庭湖区农村生态系统健康湖南省重点实验室 湖南·长沙 410128;湖南省猪场废弃物无害化处理与资源化利用工程研究中心 湖南·长沙 410128;[孙文笑; 梁运姗; 曾洪; 张学文; 邹冬生; 方俊] 湖南农业大学
关键词：
专业认知度;专业导论课程;教学改革;生态学
摘要：
专业导论课的设置能帮助学生更好地认知自己所学专业,从而协助学生制定合理的职业生涯规划。本文以湖南农业大学生态学专业的学生为调查对象,对不同年级学生的专业认知度和专业发展规划进行了分析,并对目前专业导论课程的存在问题及改革策略进行了探讨,拟为提高学生的专业认知度和改良专业导论课的教学方式提供指导。
语种：
中文
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《土壤生态学》课程教学改革探索——以湖南农业大学为例
作者：
肖智华;伍清丹;李舒惠;梁运姗;朱育锋;...
期刊：
教育现代化 ,2019年(48):36-37 ISSN：2095-8420
作者机构：
1. 湖南农业大学生物科学技术学院洞庭湖区农村生态系统健康湖南省重点实验室;2. 湖南省猪场废弃物无害化处理与资源化利用工程研究中心
关键词：
土壤生态学;理论与实践教学;教学改革
摘要：
以湖南农业大学土壤生态学教学现状和教学探索为例,对土壤生态学课程理论和实践教学改革的探索过程进行了总结。文章对我们在进行土壤生态学课程教学改革过程中发现的问题进行了分析和总结,并结合湖南农业大学生态学专业教学要求,对如何加强和提高土壤生态学教学质量提出了具体的改革措施。
语种：
中文
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绿道对不同接近度使用者体力活动影响研究——以广州市滨江绿道为例
作者：
张红云;朱战强;邹冬生
期刊：
城市规划 ,2019年43(8):75-80 ISSN：1002-1329
作者机构：
[张红云; 朱战强] 中山大学.地理科学与规划学院;[邹冬生] 湖南农业大学.
关键词：
绿色空间;接近度;体力活动;城市绿道;广州市
摘要：
城市绿道是城市绿地系统的重要组成部分,是支撑居民户外体力活动的重要空间载体,与居民的健康息息相关。其接近度被认为与居民体力活动水平有直接关系,靠近绿道等绿色空间居住的居民参与体力活动的积极性更高。本文以广州市一条典型滨江城市绿道为例,对比了不同接近度下（家到绿道距离）低、中、高强度体力行为的活动水平,探讨了绿道接近度对使用者体力水平的影响。研究发现,接近度对低强度的散步行为影响显著,靠近绿道的使用者散步的水平要高于较远者;而对中、高强度的体力行为,接近度影响的显著性不明显。整体上,虽然结果没有充分表明距离绿道较近使用者的体力活动水平比较远者高,但证明了绿道建设对增加居民户外活动有显著的促进作用,且越靠近绿道的居民受影响越大。
语种：
中文
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Environmental effects on community productivity of aquatic macrophytes are mediated by species and functional composition
作者：
Fu, Hui* ;Yuan, Guixiang* ;Li, Wei;Ge, Dabing;Zou, Dongsheng;...
期刊：
Ecohydrology ,2019年12(8):e2147- ISSN：1936-0584
通讯作者：
Fu, Hui;Yuan, Guixiang
作者机构：
[Ge, Dabing; Fu, Hui; Yuan, Guixiang; Zou, Dongsheng] Hunan Agr Univ, Hunan Prov Key Lab Rural Ecosyst Hlth Dangling La, Coll Biosci Biotechnol, Ecol Dept, Changsha 410128, Hunan, Peoples R China.;[Fu, Hui; Yuan, Guixiang] Jiangxi Inst Water Sci, Jiangxi Prov Key Lab Water Resources & Environm P, Nanchang, Jiangxi, Peoples R China.;[Li, Wei] Nanchang Inst Technol, Res Inst Ecol & Environm Sci, Nanchang, Jiangxi, Peoples R China.;[Huang, Zhenrong] Grad Univ Chinese Acad Sci, Changsha Res Stn Agr & Environm Monitoring, Key Lab Agra Ecol Proc Subtrop Reg, Chinese Acad Sci,Inst Subtrop Agr, Changsha, Hunan, Peoples R China.
通讯机构：
[Fu, H; Yuan, GX] H;Hunan Agr Univ, Hunan Prov Key Lab Rural Ecosyst Hlth Dangling La, Coll Biosci Biotechnol, Ecol Dept, Changsha 410128, Hunan, Peoples R China.
关键词：
community-weighted mean;functional diversity;functional traits;macrophytes;productivity
摘要：
Environmental variations are rapidly altering plant species and functional composition, which may have consequent influences on ecosystem functioning. We measured species and functional diversity of macrophyte community as well as environmental variables in 1,008 plots in 24 freshwater lakes across Yunnan–Guizhou plateau and Yangtze River in south China. We used generalized multilevel path models to test how the environmental effects on macrophytes productivity directly and indirectly through changes in species and functional diversity. We found distinct species and functional responses to the four groups of environmental variables:water quality, heterogeneity, climate, and topography. Macrophyte communities tended to be high richness and dominated by species with high-stem dry mass content and long flowering duration at eutrophic, heterogeneous, high altitude, or deepwater habitats. Submersed and annual species with high-specific leaf area dominated in heterogeneous and high altitude conditions, whereas species with high shoot and leaf dry mass content as well as thin stem and lamina dominated in heterogeneous and low-altitude conditions. Functional dispersion (FDis) decreased in heterogeneous and high-altitude habitats and increased at deepwater. These changes in functional composition have subsequently significant influences on community productivity, involving the opposite pathways of positive effects of community-weighted mean (CWM) traits and negative effects of FDis, ultimately contributing to the observed invariable macrophytes productivity along the tested environmental gradients. Our results provide strong evidences that both species and functional composition mediate the cascading effects of environments on macrophytes productivity. © 2019 John Wiley & Sons, Ltd.
语种：
英文
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Phytoextraction of Cd from a contaminated soil by tobacco and safe use of its metal-enriched biomass
作者：
Yang, Yang;Ge, Yichen;Tu, Pengfei;Zeng, Hongyuan;Zhou, Xihong;...
期刊：
Journal of Hazardous Materials ,2019年363:385-393 ISSN：0304-3894
通讯作者：
Zeng, Qingru
作者机构：
[Zeng, Qingru; Yang, Yang; Zou, Dongsheng] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.;[Zhou, Xihong; Zeng, Hongyuan; Zeng, Qingru; Tu, Pengfei; Ge, Yichen] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Wang, Kelin; Yang, Yang] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China.;[Wang, Kelin; Yang, Yang] Huanjiang Observat & Res Stn Karst Ecosyst, Huanjiang 547100, Peoples R China.
通讯机构：
[Zeng, Qingru] H;Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.
关键词：
Biomass;Cadmium;Chlorine compounds;Deionized water;Distillation;Extraction;Nicotine;Nutrients;Potassium hydroxide;Pyrolysis;Soil pollution;Tobacco;Bio chars;Chemical extractions;Contaminated soils;Protein contents;Renewable resource;Secondary pollution;Slow pyrolysis;Steam distillation;Metal recovery;alcohol;cadmium;deionized water;nicotine;biochar;cadmium;charcoal;nicotine;potassium;bioaccumulation;biochar;biomass;cadmium;concentration (composition);extraction method;phytoremediation;pyrolysis;recovery method;soil pollution;soil remediation;tobacco;Article;biomass;concentration (parameters);distillation;metal extraction;nonhuman;pH;plant leaf;plant stem;precipitation;protein content;pyrolysis;soil pollution;tobacco;bioremediation;chemistry;isolation and purification;metabolism;soil pollutant;tobacco;Animalia;Nicotiana tabacum;Biodegradation, Environmental;Cadmium;Charcoal;Nicotine;Potassium;Soil Pollutants;Tobacco
摘要：
Successful phytoextraction produces a large quantity of contaminated biomass, which will cause secondary pollution unless properly treated. This study investigated the disposal of contaminated tobacco biomass after phytoextraction. We detected significantly high Cadmium concentrations in tobacco, especially in their stems and leaves. From the latter, nearly all the Cd and nicotine were removed by extractions with 0.5% HCl + 70% ethanol, and the nicotine completely recovered via steam distillation, whereas the protein content remained unaffected in the leaves, thus making them safe for use as animal feed. The highest biochar yield was 47%, obtained after slow pyrolysis at 300 °C. In this case, the biochar contained the highest amount of nutrients and metals. From stem biochar, 87% of Cd and a large amount K along with several other elements were extracted by deionized water at pH 1. After acid-extraction, metals were formed precipitation and then separated from the K-enriched solution when the pH was adjusted to 11 by using drops of 40% KOH. Therefore, with improved technology to remove metals and recover nutrients and nicotine from biomass, tobacco is an ideal candidate as profit yielding crop for use in phytoextraction while also providing renewable resources. © 2018 Elsevier B.V.
语种：
英文
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Biochar as a sorbent for emerging contaminants enables improvements in waste management and sustainable resource use
作者：
Li, Longcheng;Zou, Dongsheng;Xiao, Zhihua* ;Zeng, Xinyi;Zhang, Liqing;...
期刊：
Journal of Cleaner Production ,2019年210:1324-1342 ISSN：0959-6526
通讯作者：
Xiao, Zhihua
作者机构：
[Zeng, Xinyi; Zhang, Guolin; Xiao, Zhihua; Ge, Dabing; Wang, Andong; Liu, Fen; Li, Longcheng; Zhang, Liqing; Zou, Dongsheng] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.;[Zeng, Xinyi; Zhang, Guolin; Xiao, Zhihua; Ge, Dabing; Wang, Andong; Liu, Fen; Li, Longcheng; Zhang, Liqing; Zou, Dongsheng] Key Lab Rural Ecosyst Hlth Dongting Lake Area Hun, Changsha 410128, Hunan, Peoples R China.;[Zeng, Xinyi; Zhang, Guolin; Xiao, Zhihua; Ge, Dabing; Wang, Andong; Liu, Fen; Li, Longcheng; Zhang, Liqing; Zou, Dongsheng] Hunan Engn Lab Pollut Control & Waste Utilizat Sw, Changsha 410128, Hunan, Peoples R China.;[Jiang, Longbo] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Xiao, Zhihua] H;Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China.
关键词：
Biohazards;Hazards;Waste management;Wastewater treatment;Water pollution;Adsorption mechanism;Bio chars;Emerging contaminant;Environmental treatment;Inorganic contaminants;Organic contaminant;Sustainable resource use;Wastewater treatment technologies;Contamination
摘要：
Emerging contaminants have recently been recognized as new and significant water pollutants and gained great of concerns because of their considerable effects on ecosystems and human health. Current conventional wastewater treatment technologies are not efficient at removing these trace contaminants; novel and lower cost approaches are required. Biochar is well-known as an effective adsorbent for the removal of complex inorganic contaminants and organic contaminants from water. This review provides a summary of recent research on the underlying mechanisms controlling the presence of emerging contaminants in water, as well as their removal and the environmental treatment of soil by biochar. A range of information is also presented regarding the application of this resource; it is clear that a variety of cheap, efficient, modified, and composite biochar that is able to remove emerging contaminants will be required to further advance research progress. © 2018 Elsevier Ltd
语种：
英文
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近40年洞庭湖区内湖水面面积变化及其驱动因素
作者：
高耶;谢永宏;邹冬生;侯婷娟;李正最
期刊：
湖泊科学 ,2019年31(3):755-765 ISSN：1003-5427
通讯作者：
Xie, Yonghong(xyh@isa.ac.cn)
作者机构：
[高耶; 邹冬生] College of Life Science, Hunan Agriculture University, Changsha;410128, China;[李正最] Hydrology and Water Resources Survey Bureau of Hunan Province, Changsha;410007, China;[谢永宏] Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha
通讯机构：
Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
关键词：
洞庭湖区;内湖;遥感监测;水面面积
摘要：
选择1979-2016年间多时期、多类型、多光谱遥感数据,分析评价洞庭湖区内湖近40年的面积变化.结果表明,最近40年洞庭湖区内湖面积保持相对稳定,丰水期间呈上升趋势,枯水期间波动下降,2016年内湖总面积比1980s初减少3.94%.随着湖泊面积增加,湖泊水面面积变化的比例和幅度逐渐减小,大型湖泊(>10 km~2)和中型湖泊(5~ 10 km~2)面积相对稳定,小型内湖(<5 km~2)面积变化尤为剧烈.内湖水面面积主要受降雨、蒸发等气候因素和生产生活取水、防洪排涝和退田还湖等人为活动调控. 1980-2000年和2001-2015年两个时期,洞庭湖区多年平均降雨量呈现不同程度的下降趋势,多年平均蒸发量明显上升.三峡工程运行后,三口分流衰减,但水资源需求量不断增长,退田还湖和留蓄雨洪作为水资源使得丰水期间内湖水面面积增长,气候变化和水资源开发利用导致枯水期水面面积趋于减少.有必要加强洞庭湖区内湖的研究和保护,适当退田还湖提高湖泊率,优化三口水系格局,实施河湖水系连通工程,缓解洞庭湖区季节性水资源紧张问题.
语种：
中文
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不同生理性质氮肥对油菜吸收积累镉的影响
作者：
李子涵;肖智华;沈榕;乐羿;刘翊涵;...
期刊：
江苏农业科学 ,2019年47(14):82-86 ISSN：1002-1302
作者机构：
[曾馨怡; 沈榕; 刘翊涵; 肖智华; 李子涵; 乐羿; 邹冬生] 湖南农业大学生物科学技术学院/洞庭湖区农村生态系统健康湖南省重点实验室,湖南长沙,410128
关键词：
氮肥;油菜;生物量;提取量
摘要：
在用油菜来修复镉(Cd)污染土壤时,施加的氮肥作为最主要的大量元素肥料,可以影响油菜吸收积累Cd.探究了施加不同生理性质的氮肥和添加Cd对油菜(Brassica napus L.)产量和油菜吸收积累Cd的影响,以期为采用油菜来修复Cd污染土壤提供合理施氮参考.结果表明,以Cd提取量为衡量标准,采用油菜修复Cd污染土壤最适用的氮肥为生理中性氮肥碳酸氢铵(NH4 HCO3).
语种：
中文
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生态学背景下的“环境影响评价”课程教学方案研究
作者：
梁运姗;雷龙;吴爱平;邹冬生;方俊
期刊：
科教导刊 ,2019年(2):92-94 ISSN：1674-6813
作者机构：
湖南农业大学生物科学技术学院,洞庭湖区农村生态系统健康湖南省重点实验室 湖南·长沙 410128;湖南省猪场废弃物无害化处理与资源化利用工程研究中心 湖南·长沙 410128;[雷龙; 梁运姗; 邹冬生; 方俊; 吴爱平] 湖南农业大学
关键词：
生态学;环境影响评价;教学方案
摘要：
基于目前很多高职院校以及高等院校对于环境类专业学生开设的"环境影响评价"课程的建设与探讨相当多,而针对生态学专业学生的该课程建设探讨较少,笔者针对湖南农业大学的生态学专业本科生培养,进行该课程的教学方案研究,从课程建设的必要性、目标、内容、教学方法与手段等方面提出相应措施,以供生态学专业培养与教学工作的借鉴参考,并以期培养出高素质的生态学人才。
语种：
中文
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衡阳紫色土丘陵坡地植被恢复过程中土壤可矿化碳库特征
作者：
杨宁;杨满元;姜琳;万丽;吴磊;...
期刊：
草地学报 ,2019年27(2):320-325 ISSN：1007-0435
作者机构：
湖南环境生物职业技术学院园林学院,湖南衡阳,421005;湖南农业大学生物科学技术学院,湖南长沙,410128;[万丽; 杨宁; 杨满元; 吴磊; 姜琳] 湖南环境生物职业技术学院;[邹冬生] 湖南农业大学
关键词：
碳库特征;可矿化碳;植被恢复;紫色土;有机碳
摘要：
本研究采用空间序列代替时间序列方法,研究衡阳紫色土丘陵坡地植被恢复过程0~10、10~20与20~40cm土层土壤可矿化碳库特征。结果表明:恢复过程中土壤有机碳含量、可矿化碳含量和矿化速率随土层加深而减少,随恢复进程而增加;矿化率随恢复进程增加,随土层加深先减后增再分布均匀;累积矿化排放量及其速率随恢复进程增加,其速率随培养时间延长而减小;qCO2值随恢复进程和土层加深而递减;土壤可矿化碳含量与凋落物现存量、质量损失率的相关系数r分别为-0.698^*和0.915^**(*P<0.05,**P<0.01)。研究表明,随着植被恢复进行,土壤生境由早期干扰强烈转向中后期日趋稳定,土壤固碳能力由早期差、潜力大转向中后期强、潜力小。
语种：
中文
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Local and regional drivers of turnover and nestedness components of species and functional beta diversity in lake macrophyte communities in China
作者：
Fu, Hui* ;Yuan, Guixiang;Jeppesen, Erik;Ge, Dabing;Li, Wei;...
期刊：
Science of The Total Environment ,2019年687:206-217 ISSN：0048-9697
通讯作者：
Fu, Hui
作者机构：
[Wu, Aiping; Ge, Dabing; Liu, Qiaolin; Zou, Dongsheng; Fu, Hui; Yuan, Guixiang] Hunan Agr Univ, Ecol Dept, Coll Biosci & Biotechnol, Hunan Prov Key Lab Rural Ecosyst Hlth Dongting La, Changsha 410128, Hunan, Peoples R China.;[Fu, Hui; Yuan, Guixiang] Jiangxi Inst Water Sci, Beijing East Rd 1038, Nanchang 330029, Jiangxi, Peoples R China.;[Jeppesen, Erik] Aarhus Univ, Dept Biosci, Vejlsovej 25, DK-8600 Silkeborg, Denmark.;[Li, Wei] Nanchang Inst Technol, Res Inst Ecol & Environm Sci, Nanchang 330099, Jiangxi, Peoples R China.;[Huang, Zhenrong] Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Changsha Res Stn Agr & Environm Monitoring, Inst Subtrop Agr,Grad Univ Chinese Acad Sc, Changsha 410125, Hunan, Peoples R China.
通讯机构：
[Fu, Hui] H;[Fu, Hui] J;Hunan Agr Univ, Ecol Dept, Coll Biosci & Biotechnol, Hunan Prov Key Lab Rural Ecosyst Hlth Dongting La, Changsha 410128, Hunan, Peoples R China.;Jiangxi Inst Water Sci, Beijing East Rd 1038, Nanchang 330029, Jiangxi, Peoples R China.
关键词：
Climate;Functional traits;Nutrient enrichment;Partitioning beta diversity;Spatial scale
摘要：
Beta diversity describes the variation in species composition between sites and is often influenced by both local and regional processes. Partitioning beta diversity into turnover (species replacement between sites) and nestedness (richness difference between sites) components may enhance our understanding of the mechanisms behind the local and regional drivers determining species composition across spatial scales. We sampled macrophyte communities in 24 lakes in two regions (Yangtze River basin and Yunnan-Guizhou plateau) of China covering broad climate and nutrient gradients. Based on both species and functional approaches, we calculated multiple-site beta diversity using the Sorensen dissimilarity index and partitioned it into turnover and nestedness coefficients crossed with two nested spatial scales: among depths within transects (transect scale) and among transects within lakes (lake scale). The overall species beta diversity and functional beta diversity (i.e. Sorensen coefficient) were significantly lower and thus more homogeneous at lake scale. Across spatial scales, species beta diversity was mainly explained by turnover patterns (56-61%) and functional beta diversity primarily by nestedness patterns (58-65%). Both local and regional drivers contributed to structuring species and functional beta diversity patterns, largely through changes in species turnover and functional nestedness, respectively. Overall, we observed a significant increase in species beta diversity and its turnover component while a decreasing trend in functional beta diversity and its nestedness component at high altitude. Our results further emphasized that the species beta diversity and its turnover component decreased at high total phosphorus concentration (TP) across the two spatial scales, while the functional beta diversity and its nestedness component decreased at high TP at the transect scale. We conclude that understanding of the relative role of local and regional drivers in determining macrophyte diversity patterns may help managers to select the most appropriate conservation strategies for preservation of biodiversity varying with the scale in focus.
语种：
英文
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镉对土壤微生物的影响及微生物修复镉污染研究进展
作者：
袁金蕊;郭富睿;邹冬生;曾清如
期刊：
湖南农业科学 ,2018年(3):114-117,122 ISSN：1006-060X
作者机构：
湖南农业大学生物科学技术学院,洞庭湖区农村生态系统健康湖南省重点实验室,湖南 长沙 410128;[曾清如; 袁金蕊; 郭富睿; 邹冬生] 湖南农业大学
关键词：
镉污染;微生物量;微生物修复;综述
摘要：
随着工业的发展及农业化肥和农资物质的广泛施用,土壤重金属污染越来越严重,其中镉污染问题尤为突出。阐述了土壤中镉污染的现状以及镉污染对土壤微生物的影响。随着土壤中镉浓度的增加,对土壤微生物影响越大,高浓度（1 000 mg/kg）能导致微生物种群数量减少甚至完全消失。在总结已有的研究基础上,提出微生物生物量受到镉抑制临界值（浓度）范围可能分别为:2040 mg/kg。同时综述了微生物（真菌、细菌和藻类菌体）对土壤中污染镉的修复技术,并对土壤镉污染治理和修复提出问题和展望。
语种：
中文
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