检索结果-南通市图书馆

Runoff change in the Yellow River Basin of China from 1960 to 2020 and its driving factors

Journal of Arid Land 2024年第2期16卷 168-194页

作者： WANG Baoliang WANG Hongxiang JIAO Xuyang HUANG Lintong CHEN Hao GUO Wenxian School of Water Conservancy North China University of Water Resources and Electric PowerZhengzhou 450046China College of Water Resources North China University of Water Resources and Electric PowerZhengzhou 450046China

Analysing runoff changes and how these are affected by climate change and human activities is deemed crucial to elucidate the ecological and hydrological response mechanisms of rivers.The Indicators of Hydrologic Alteration and the Range of Variability Approach(IHA-RVA)method,as well as the ecological indicator method,were employed to quantitatively assess the degree of hydrologic change and ecological response processes in the Yellow River Basin from 1960 to 2020.Using Budyko's water heat coupling balance theory,the relative contributions of various driving factors(such as precipitation,potential evapotranspiration,and underlying surface)to runoff changes in the Yellow River Basin were quantitatively evaluated.The results show that the annual average runoff and precipitation in the Yellow River Basin had a downwards trend,whereas the potential evapotranspiration exhibited an upwards trend from 1960 to 2020.In approximately 1985,it was reported that the hydrological regime of the main stream underwent an abrupt change.The degree of hydrological change was observed to gradually increase from upstream to downstream,with a range of 34.00%-54.00%,all of which are moderate changes.However,significant differences have been noted among different ecological indicators,with a fluctuation index of 90.00%at the outlet of downstream hydrological stations,reaching a high level of change.After the mutation,the biodiversity index of flow in the middle and lower reaches of the Yellow River was generally lower than that in the base period.The research results also indicate that the driving factor for runoff changes in the upper reach of the Yellow River Basin is mainly precipitation,with a contribution rate of 39.31%-54.70%.Moreover,the driving factor for runoff changes in the middle and lower reaches is mainly human activities,having a contribution rate of 63.70%-84.37%.These results can serve as a basis to strengthen the protection and restoration efforts in the Yellow River Basin and further promote the rational development an

关键词： Budyko theory hydrological regime attribution analysis ecological responses Yellow River climate change human activity runoff

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

Land use change and its corresponding ecological responses:a review

引用

Journal of Geographical Sciences 2005年第3期15卷 305-328页

作者： SHAO Jingan NI Jiupai WEI Chaofu XIE Deti College of Resource and Environment Southwest Agricultural University Chongqing 400716China Chongqing Key Lab. of Digital Agriculture Chongqing 400716 China

This paper reviews the research on land use change and its corresponding ecological responses. Patterns of land use changes in spatio-temporal level are produced by the interaction of biophysical and socio-economic processes. Nowadays, the studies derived from different socioeconomic conditions and scales show that at short-term scale, human activities, rather than natural forces, have become a major force in shaping the environment, while biophysical factors control the trends and processes of land use change under the macro environmental background. Providing a scientific understanding of the process of land use change, the impacts of different land use decisions, and the ways that decisions are affected by a changing environment and increasing ecological variability are the priority areas for research：（1） explanation of scale dependency of drivers of land use change; （2） quantification of driving factors of land use change; （3） incorporation of biophysical feedbacks in land use change models： and （4） underlying processes and mechanisms of ecological impacts of land use change.

关键词： land use change ecological responses explanation

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

Formation and functions of arbuscular mycorrhizae in coastal wetland ecosystems:A review

引用

Ecosystem Health and Sustainability 2022年第1期8卷 310-323页

作者： Xing-Qiang Wang Yan-Hong Wang Yao-Bin Song Ming Dong Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration College of Life and Environmental SciencesHangzhou Normal UniversityHangzhouChina State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhouChina

Context:Coastal wetlands are ecotones interspaced by land and ocean and are among the most sensitive and vulnerable ecosystems worldwide.They are unique in hydrological,edaphic,atmospheric,and biological characteristics,and play important roles in maintaining the ecological security and ecosystem services of coastal zones.Arbuscular mycorrhizae(AM)are symbiont composed of plant roots and arbuscular mycorrhizal fungi(AMF),which are soilborne microorganisms widely distributed in various habitats.Many previous studies on mycorrhiza have focused on terrestrial ecosystems while few on wetlands,especially coastal wetlands.Method:We systematically reviewed previous relevant studies to explore the formation and functions of AM in coastal wetland ecosystems as well as the environmental factors that affect them.Habitat characteristics,morphological types,and species diversity of AMF in the coastal wetlands were summarized.Both responses of AMF to environmental factors during AM formation and the functions of AM in coastal wetlands were discussed.Result:AMF are worldwide distributed in coastal wetland and are mainly limited by flooding,hypoxia,soil pH,salinity and the host plants identification.AMF play important roles in coastal wetlands,involving promoting nutrient uptake of host plants,improving the characteristics of rhizospheric soil,and enhancing plant resistance to salt and flooding stress.Conclusion:More comprehensive studies of AMF in vitro in coastal wetlands would be helpful for the conservation and restoration of coastal wetland ecosystems in the changing world.

关键词： Arbuscular mycorrhizal fungi coastal wetlands ecological responses ecosystem effects environmental factors

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

Reframing the payments for ecosystem services framework in a coupled human and natural systems context:strengthening the integration between ecological and human dimensions

引用

Ecosystem Health and Sustainability 2017年第5期3卷 1-12页

作者： Rebecca L.Lewison Li An Xiaodong Chen Department of Biology San Diego State UniversitySan DiegoCAUSA Department of Geography San Diego State UniversitySan DiegoCAUSA Department of Geography University of North Carolina at Chapel HillChapel HillNCUSA

Introduction:As challenges to biodiversity mount,land-use policies have been implemented to balance human needs and the integrity of ecological systems.One such program,Payments for Ecosystem Services(PES),incentivizes resource users to protect ecosystem services and has been implemented around the world to reduce soil erosion,create or improve wildlife habitats,and improve water quality and other environmental goals.The PES policy,at its core,is a concept that aims to capture the reciprocal relationships between human systems and ecological function and process.As such,PES epistemologically embodies a coupled human and natural systems approach.Outcomes:Yet,despite this conceptual alignment,the on-the-ground implementation or evaluation of PES typically does not adopt this coupled approach and PES programs have little integration between socioeconomic,sociocultural,human demographic,and ecological elements.To advance the evolution of PES,we consider what and how socioeconomic and ecological factors have been incorporated into PES program implementation and evaluation.We also present a conceptual model to articulate how PES research can capture the reciprocal relationships among socioeconomics,demography,and ecology and discuss the quantitative modeling approaches that can support this conceptual development,i.e.,structural equation and agent-based modeling,and latent trajectory models.Conclusions:By strengthening the conceptual framework for PES within a coupled human and natural systems approach and identifyinganalytical approaches that can be used to quantify and characterize these complex cross-disciplinary relationships,we aim to support the evolution and advancement of PES,in service of more meaningful and positive outcomes for human well-being and ecological sustainability.

关键词： Agent-based modeling disciplinary integration ecological responses human socioeconomics latent trajectory models structural equation modeling

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

C,N,P,Si composition of Thalassiosira rotula and Skeletonema costatum in Jiaozhou Bay,China

C,N,P,Si composition of Thalassiosira rotula and Skeletonema...

引用

中国海洋湖沼学会第九次全国会员代表大会暨学术研讨会

作者：沈志良中国科学院海洋研究所

＜正＞C,N,P,Si composition of two different sized phytoplankton common species of Thalassiosira rotula and Skeletonema costatum and their ecological responses to the nutrient structure of seawater in Jiaozhou Bay were studied in this paper.C,N,P,Si contents in cell were obvious higher in T.rotula than in Sk.costatum,but the percents of N,P,Si contents in cell dry

关键词： C N P Si composition ecological responses Jiaozhou Bay Skeletonema costatum Thalassiosira rotula

来源： cnki会议评论

在线全文

cnki会议

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

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

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：