检索结果-南通市图书馆

Stoichiometric flexibility regulates the co-metabolism effect during organic carbon mineralization in eutrophic lacustrine sediments

引用

Journal of Oceanology and Limnology 2022年第5期40卷 1974-1984页

作者： Jie MA Fei HE Xingcheng YAN Ruijie SHI Ming JI Bin XU Xiaodong WU Zhichun LI Xiaoguang XU Guoxiang WANG Nanjing Institute of Environment Sciences Ministry of Ecology and EnvironmentNanjing 210042China Sorbonne university ParisUMR 7619METISParis 75005France School of Environment Nanjing Normal UniversityNanjing 210023China College of Urban and Environmental Sciences Hubei Normal UniversityHuangshi 435002China School of Environment and Surveying Engineering Soochow UniversitySuzhou 234000China

Several studies have suggested the pivotal roles of eutrophic lakes in carbon(C)cycling at regional and global ***,how the co-metabolism effect on lake sediment organic carbon(OC)mineralization changes in response to integrated inputs of labile OC and nutrients is poorly *** knowledge gap hinders our ability to predict the carbon sequestration potential in eutrophic ***,a 45-day microcosm experiment was conducted to examine the dominant mechanisms that underpin the co-metabolism response to the inputs of labile C and nutrients in lacustrine *** indicate that the labile C addition caused a rapid increase in the positive co-metabolism effect during the initial stage of incubation,and the co-metabolism effect was positively correlated with the C input *** positive co-metabolism effect was consistently higher under high C input,which was 152%higher than that under low C *** higherβ-glucosidase activity after nutrient addition,which,in turn,promoted the OC mineralization in *** addition different impacts of nutrients on the co-metabolism effect under different C inputs were *** with the low nutrient treatments,the largest co-metabolism effect under high C with high nutrient treatment was observed by the end of the *** the high C treatment,the intensity of the co-metabolism effect(CE)under high nitrogen treatment was 1.88 times higher than that under low nitrogen ***,in the low C treatment,the amount of nitrogen had limited impact on co-metabolism *** study thus proved that the microorganisms obviously regulate sediment OC turnover via stoichiometric flexibility to maintain a balance between resources and microbial requirements,which is meaningful for evaluating the OC budget and lake eutrophication management in lacustrine sediments.

关键词： co-metabolism effect stoichiometric carbon cycling eutrophic lake decomposition organic carbon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

考虑极化效应的冻土电导率测试频率研究

引用

中南大学学报（自然科学版） 2023年第12期54卷 4817-4827页

作者：成昌帅冯学茂滕继东罗豪良张升中南大学土木工程学院湖南长沙410075 CNRS EPHEUMR 7619 MetisSorbonne UniversityParis 75005France

为探究测试频率对土体电导率的影响,针对多种非饱和土样开展不同测试频率及正负温度下的电导率测试试验。基于测试结果,给出不同土性及温度下的最佳测试频率。研究结果表明:正温下砂土电导率对低于10 kHz的测试频率不敏感;当测试频率大... 详细信息

为探究测试频率对土体电导率的影响,针对多种非饱和土样开展不同测试频率及正负温度下的电导率测试试验。基于测试结果,给出不同土性及温度下的最佳测试频率。研究结果表明:正温下砂土电导率对低于10 kHz的测试频率不敏感;当测试频率大于10 kHz时,砂土电导率随测试频率增大而增大;粉土对低于100 kHz的测试频率不敏感;负温下测试频率对土体电导率的影响较正温区间显著,粉土和砂土的电导率在不同的极化区域随测试频率增大而快速增大,且增大的测试频率域随温度降低逐渐向低频扩展;粗粒土较细粒土对测试频率更敏感。

关键词：冻土电导率测试频率极化粒径

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Development of a Model for Assessing Vulnerability to Pollution of Groundwater in Fissured Aquifers: The Case of the Ehania Watershed (South-Eastern Côte d’Ivoire)

引用

Journal of Environmental Protection 2021年第1期12卷 1-12页

作者： Brou Dibi Arthur Brice Konan-Waidhet Valérie Plagnes Jean Biemi UFR Environment/Jean Lorougnon Guedé university Daloa C&ocirc te d’Ivoire umr metis/sorbonnes university Paris France UFR STRM/Felix Houphouet Boigny university Abidjan C&ocirc te d’Ivoire

The protection of aquifers is a major concern for the authorities, especially in areas where there are large agro-industrial exploitations. The objective of this study is to define a new method of aquifer protection based on the characteristics of the structures of aquifers. The intrinsic vulnerability mapping method, PaPRI was used. It is a variant of the PaPRIKa method applied in karstic environment which has been adapted for its application in basement environment. This method uses three factors, including aquifer protection (P), using the soil cover, the unsaturated zone and the thickness of the alteration layer, (R) for the rock type and (I) for infiltration which including slope and drainage density. PAPRI is a method based on the weighting of different factors. The results obtained show 4 classes that evolve from low vulnerability classes (5% of the study area) to high and very high vulnerability classes (58%) and average vulnerability classes (37%). The classes of high and very high vulnerability, which indicate the zones that are very exposed to pollution, are more present in the central-northern part of the study area, with a few appearances towards the south. These zones could be related to topography due to the often very high slopes observed in the area. One of the advantages of this new method lies in the characterization of the alterations that strongly influence the migration of pollutants towards the water tables according to their nature and their thickness.

关键词： Vulnerability to Pollution Groundwater PaPRI Fissured Aquifer Ehania Watershed Côte d’Ivoire

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genesis and soil environmental implications of intact in-situ rhizoliths in dunes of the Badain Jaran Desert,northwestern China

引用

Acta Geochimica 2022年第5期41卷 811-822页

作者： Qingfeng Sun Kazem Zamanian Arnaud Huguet Omid Bayat Hong Wang Hanan SBadawy Key Laboratory of Resource Environment and Sustainable Development of Oasis Northwest Normal University730070 LanzhouGansu ProvinceGansuPR China Key Laboratory of Eco-function Polymer Materials of the Ministry of Education Northwest Normal University730070 LanzhouGansuPR China Institute of Soil Science Leibniz University of HannoverHerrenhäuser Straße 230419 HannoverGermany Sorbonne Université CNRSEPHEUMR METISF-75005 ParisPSLFrance Department of Soil Science Isfahan University of Technology84156-83111 IsfahanIran Interdisciplinary Research Center of Earth Science Frontier Beijing Normal University100875 BeijingPR China Department of Geology Faculty of ScienceBeni-Suef University62521 Beni-SuefEgypt School of Geographical Sciences Nanjing University of Information Science and Technolog210044NanjingChina

Desert rhizoliths are generally found as weathered,broken and scattered samples on dune field surface,but rarely insitu in their initial states buried under the soil of desert in the Badain Jaran Desert,northwest *** study off ers an assessment of the morphological,mineralogical,and chemical properties of intact and in-situ rhizoliths found in soils of swales and depressions among dune *** characteristics of these rare and precious objects were assessed using optical polarizing microscopy,cathodoluminescence,scanning electronic microscopy,radiocarbon dating,and stable isotopic analyses,providing the opportunity for discussion of the rhizolith formation mechanisms and associated environmental *** and laboratory investigations showed that the in-situ intact rhizoliths were formed only in the places where Artemisia shrubs are living,and the remaining root relicts within rhizoliths belong to this *** spatial distribution of rhizoliths also suggested that low topographic positions on a landscape provided soil moisture,and redox environments favored rhizolith formation.A semi-closed redox environment in the subsoil at swales and depressions,where water is always present,along with the sandy soil texture,facilitated fast water percolation to deeper depths and *** a soil environment not only provides water for Artemisia growth,but also for the weathering of minerals such as felspars and calcite from primary carbonates,and for the decomposition of root ***,harsh climatic conditions,such as strong winds and solar radiation,led to water evaporation through dead root channels and triggered the calcification along the root *** entrapped lithogenic carbonates and to a lesser extent the decomposition of Artemisia roots provided the carbon sources for the rhizoliths formation,while the weathering of soil minerals,particularly feldspars and carbonates,was the main source of *** in the Badain Jaran des

关键词： Rhizoliths Calcification Leptic regosols Artemisia roots Decomposition Soil moisture

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New Geological and Hydrogeological Information on the Eastern Border of the Gondo Plain （Burkina Faso）

引用

Journal of Environmental Science and Engineering(B) 2015年第12期4卷 649-656页

作者： Youssouf Koussoube Samuel Nakolendousse Pierre Ribstein Roger Guerin Suzanne Yameogo Alain Nindaoua Savadogo Department of Earth Sciences University of Ouagadougou Ouagadougou 09-848 Burkina Faso umr metis Sorbonne Universities Paris 75052 France

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sex-specific effects of inbreeding and early ife conditions on the adult oxidative balance

引用

Current Zoology 2018年第5期64卷 631-639页

作者： Raissa Anna DE BOER David COSTANTINI Giulia CASASOLE Hamada ABDELGAWAD Han ASARD Marcel EENS Wendt MIJLLER Behavioural Ecology and Ecophysiology Group University of Antwerp Antwerp B2610 Belgium ComEU sorbonnes Universites UMR 7221 CNRS/MNHN Museum National d'Histoire Naturelle France university of Antwerp and Integrated Molecular Plant physiology Research Antwerp B2020 Belgium Department of Botany and Microbiology University of Beni-Suef Beni-Suef Egypt

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

乙草胺胁迫下水位对湿地芦苇生长及土壤酶活性的影响

引用

森林工程 2021年第2期37卷 24-29页

作者：冯岚严岩闫兴成韩建刚南京林业大学土木工程学院南京210037 加利福尼亚河滨分校植物与植物科学系生态复杂性和建模实验室河滨市92521 生态环境部南京环境科学研究所生态保护与修复研究中心南京210042 索邦大学 UMR 7619 METIS实验室巴黎75005 南京林业大学环境与生物学院南京210037 南京林业大学南方现代林业协同创新中心南京210037 江苏洪泽湖湿地生态系统国家定位观测研究站江苏洪泽223100

为揭示除草剂乙草胺胁迫下不同水位对湿地植物芦苇生长发育的影响及土壤酶的响应,为湿地生态恢复提供科学依据,本文通过室内模拟试验研究乙草胺胁迫下水位在0、5、10、15 cm时,对湿地芦苇生长发育及土壤酶活性的影响。结果表明:在水深15... 详细信息

为揭示除草剂乙草胺胁迫下不同水位对湿地植物芦苇生长发育的影响及土壤酶的响应,为湿地生态恢复提供科学依据,本文通过室内模拟试验研究乙草胺胁迫下水位在0、5、10、15 cm时,对湿地芦苇生长发育及土壤酶活性的影响。结果表明:在水深15 cm时,除草剂乙草胺降解速率较快,乙草胺胁迫下水位波动对湿地芦苇的株高生长量、茎粗和干重无显著影响,湿地芦苇的生长不受影响,在生理特性方面水深10 cm时,芦苇叶片叶绿素含量最高,为0.36 mg/g,显著高于水深0 cm时的含量,而此时,可溶性糖含量最大为42.17 mg/g;在水深15 cm时,芦苇叶片可溶性糖含量较低,显著低于其他处理;乙草胺胁迫下随着水位的加深,土壤过氧化氢酶和碱性磷酸酶活性在各个处理水平间差异不显著,水深10 cm时,蔗糖酶活性最大,为0.19 mg/g。因此,除草剂乙草胺质量分数为139.88μg/kg,水深10 cm时,土壤酶活性较高,可增强土壤中相关营养元素的转化效率,促进湿地芦苇生长发育。

关键词：水位乙草胺湿地芦苇土壤酶

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：