Identifying hotspots and management of critical ecosystem services in rapidly urbanizing Yangtze River Delta Region, China

Rapid urbanization has altered many ecosystems, causing a decline in many ecosystem services, generating serious ecological crisis. To cope with these challenges, we presented a comprehensive framework comprising five core steps for identifying and managing hotspots of critical ecosystem services in a rapid urbanizing region. This framework was applied in the case study of the Yangtze River Delta (YRD) Region. The study showed that there was large spatial heterogeneity in the hotspots of ecosystem services in the region, hotspots of supporting services and regulating services aggregately distributing in the southwest mountainous areas while hotspots of provisioning services mainly in the northeast plain, and hotspots of cultural services widespread in the waterbodies and southwest mountainous areas. The regionalization of the critical ecosystem services was made through the hotspot analysis. This study provided valuable information for environmental planning and management in a rapid urbanizing region and helped improve China's ecological redlines policy at regional scale

Spatial assessment and management of regional ecosystem services in the Yangtze River Delta Region

The Yangtze River Delta (YRD) metropolitan region is one of the most rapidly urbanized regions in China and has experienced a remarkable period of population growth (at an annual growth rate of 3.0%), and urbanization (at an annual growth rate of 9.2%). Rapid urbanization has dramatically changed land use/land cover patterns and ecosystems in the region, causing widespread environmental problems such as habitat fragmentation, aggravation of environmental pollution, decline in biodiversity and ecosystem degredation. These problems have restricted the sustainable development of socio-economic system of the Yangtze River Delta Region. Facing the challenges, the Yangtze River Delta Region is carrying out the practice of regional integration planning and cooperation in environmental governance, which urgently needs the guidance of relevant theories and methods. Some of the key environmental policy pilots have been carried on in this region, such as the Ecological Red Line Policy (Bai et al, 2016; Lü et al, 2013). This policy has one of the main objectives of protecting important eco-function areas i.e. ecosystem service hot spots, to deliver services such as water storage, clean drinking water, and carbon sequestration, and to maintain ecological safety to support economic and social development, which an important policy orientation of ecosystem services approach.Ecosystem services are the contributions of ecosystem structure and function to human well-being, connecting natural and socio-economic systems. The ecosystem services approach is considered to be one of the important decision support tools for guiding and formulating environmental policies. Based on the theories and methods of ecosystem services, combined with local expert knowledge, remote sensing and GIS technologies, this dissertation aims is mainly to develop a comprehensive framework of ecosystem services assessment and decision support for rapid urbanization regions.Based on this framework, the spatial characteristics, supply-demand relationship and flow direction of ecosystem services in the Yangtze River Delta Region are analysed and evaluated. Main results of this thesis are as follows:(1) According to the characteristics of the regional ecosystems of the Yangtze River Delta Region, combined with local expert knowledge, the Burkhard’s scoring and assessment method of ecosystem services was improved, and the score matrix between twelve ecosystem types and twenty-three ecosystem services in the Yangtze River Delta Region was established.(2) Based on DPSIR model, the characteristics of the social-ecological complex ecosystem and change of ecosystem services in the Yangtze River Delta Region were analysed. The main ecological and environmental problems were identified. Causes and main driving forces of decline in ecosystem services were revealed in the region.(3) Based on ARCGIS platform, the status quo of ecosystem services in the Yangtze River Delta region was analysed and evaluated. The spatial differentiation characteristics and main impact factors of ecosystem services in the Yangtze River Delta region were clarified. The hot spots of total ecosystem services were aggregated in the southwest areas, while the cold spots were distributed in the middle and northeast areas of the region. The hot spots of supporting services and regulating services aggregately distributed in the southwest mountainous areas while hot spots of provisioning services mainly in the northeast plain, and high value of cultural services widespread in the waterbodies and southwest mountainous areas. The spatial heterogeneity is determined by biophysical features and land use types. Based on the assessment, six major ecosystem services functional zones were divided: (I) South Ecological Integrity Conservation Zone, (II) Southwest Mountainous and Hilly Forest Ecological Zone, (III) Northeast Plain Agriculture Ecological Zone, (IV) Middle Aquatic Ecological Conservation Zone, (V) Eastern Coastal Estuaries Ecological Zone, and (VI) Urban Development Area., and the corresponding management strategies on the basis of environmental problems and ecosystem services characteristics in each of the functional zones were put forward.(4) Using regional spatial data in net primary productivity, the quality levels of forest and cropland were graded and the previous scores of ecosystem services in forest and cropland were calibrated. Then, the hot spots and clustering patches of forest and farmland ecosystem services were identified by ARCGIS tools. Finally, the forest ecosystem conservation areas (red line) and cropland ecosystem conservation areas (red line) in the Yangtze River Delta region were delineated.(5) Based on the improved Burkhard’s supply-demand budget of ecosystem services method, the budgets of three regulating services (erosion regulating service, flood regulating service and water purification regulating service) of the sixteen core cities in the region were established, and the characteristics of surplus and deficit of three services of the cities in the region were analysed. Combing the budget with analysis of flow direction of ecosystem services, the potential provisioning cities and the benefiting cities of ecosystem services are identified. On the basis of the results, the potential model of regional inter-city environmental cooperation is proposed.This dissertation not only improves the methods of ecosystem service assessment and decision support in rapidly urbanized regions, but also makes contributions to the guidance in delineation of ecological red line, regional environmental cooperation and sustainable development in the Yangtze River Delta Region

Comparative Approaches in Managing Wetland Environments and Land Uses: Rainbow Lake in Michigan, Guangzhou City in China, and Chinese Sponge Concept Case Studies

Environmental scientists, natural resources agencies, planners, landscape architects, engineers, and concerned citizens are interested in the impacts that land uses within watersheds have upon lake water quality and water runoff volume. For the past 40 years, much has been discovered and many North American water bodies from small to large can be reliably modeled and studied, employing phosphorus as the identifier of water quality. We present an overview of the key features in this multi-disciplinary effort and illustrate how to apply the general method to Rainbow Lake, in Gratiot County, Michigan, the USA. In addition, we illustrate how these fundamental ideas are being employed at the Haizhu wetland park, a large wetland setting in Guangzhou, the People’s Republic of China, and present Chinese planning and design efforts termed “sponge city” to address new ideas to reduce runoff and improve water quality

Current use of Spatial Information Technology in Megacity Management

One objective of FIG Commission 3 focuses on promoting the use of Spatial Infrastructure Management (SIM)-tools at different administrative levels for decision makers and citizens to support the goals of participatory democracy. In this context FIG Commission 3 has set up the Working Group WG3.2 Spatial Data Infrastructures in Mega cities, which aims at identifying relevant spatial tools to support development and use of spatial data infrastructure (SDI) by city authorities in the world’s largest cities. The strategy of the work program emphasizes key problems of mega cities by reviewing SDI developments in existing mega cities, documenting case studies, including lessons learned about solutions for problems and should finally lead to a toolkit for use of best practises in SDI for managing mega cities. To complement the results of direct correspondence with administrations of mega cities one important part of this project concentrates on a background research of existing sources about overall use of SDI in mega cities. The objective of this paper is to discuss the results of an internet search concerning the use of Spatial Information Technology in the world’s currently existing mega cities. The search starts from a nationwide view on the execution and the progression status of SDI’s in the home countries of mega cities and zooms in to the specific aspects of spatial data management in the metropolitan areas of special interest. As a result we come to the conclusion, that current SDI development in mega cities covers the whole range from first stage conceptual ideas up to an almost complete operational SDI availability

Launching Delta Alliance, final report of phase 2

Delta Alliance is a network that aims to improve the resilience of the world’s deltas. It provides a foundation and framework for international knowledge sharing and development around delta issues. Phase 2 focussed on three components: developing the Delta Alliance organization, initiating network activities and (development of) research and knowledge sharing projects

Dynamics of Land Use and Land Cover Changes in Harare, Zimbabwe: A Case Study on the Linkage between Drivers and the Axis of Urban Expansion

With increasing population growth, the Harare Metropolitan Province has experienced accelerated land use and land cover (LULC) changes, influencing the city’s growth. This study aims to assess spatiotemporal urban LULC changes, the axis, and patterns of growth as well as drivers influencing urban growth over the past three decades in the Harare Metropolitan Province. The analysis was based on remotely sensed Landsat Thematic Mapper and Operational Land Imager data from 1984–2018, GIS application, and binary logistic regression. Supervised image classification using support vector machines was performed on Landsat 5 TM and Landsat 8 OLI data combined with the soil adjusted vegetation index, enhanced built-up and bareness index and modified difference water index. Statistical modelling was performed using binary logistic regression to identify the influence of the slope and the distance proximity characters as independent variables on urban growth. The overall mapping accuracy for all time periods was over 85%. Built-up areas extended from 279.5 km2 (1984) to 445 km2 (2018) with high-density residential areas growing dramatically from 51.2 km2 (1984) to 218.4 km2 (2018). The results suggest that urban growth was influenced mainly by the presence and density of road networks

Mangroves degradation: a local perspective on its awareness

Mangroves in Malaysia reside on the coastlines, and the largest areas of mangrove are in the Northern Sabah. Over the past decades, mangrove species have been reported to be disappearing from the globe. It is due to several natural processes that have been inserted to fill the needs of the increased population. These include illegal logging, agriculture activities and urbanisation. In this regards, awareness of the local residents about the problem of mangrove depletion is important to inhibit the problem to prolong further.Therefore, this research was conducted to determine the degree of awareness of local residents on the importance of mangroves in managing environmental quality. Consequently, a questionnaire survey was conducted on 103 respondents to examine their awareness on the subject of mangrove degradation.The respondents were selected randomly among local residents of Kuala Selangor district.It is found that only twenty percent of the total number of respondents are totallyaware of the issue and acted upon it; either taking part in the endeavours made by the government as well as those with the nongovernmental bodies or practicing mangroves replanting at their backyard

Protecting China Cedar (Cryptomeria fortunei) habitat using GIS-based simulation, modeling of existence probability, and function zoning

The Tianmu Mountain National Nature Reserve (TMNNR) preserves the only primeval forest of China cedar (Cryptomeria fortune

Maps, Libraries and the “GIS Librarian”: an Informal Review of International Cartographic Libraries

A significant research potential in South Africa is recognized by the researcher for the intersection of map services, geospatial data, libraries and education. This paper acknowledges that together, cartographic technology and map collections have the potential to unlock cartographic related research. Based on research conducted in 2010 for the Postgraduate Diploma in Library and Information Science at the University of Cape Town, this paper presents an overview of current literature and investigates what cartographic services are provided by a selection of national and international academic libraries.The methodology employed was to use the Shanghai Ranking Consultancy (2010) system to identify and choose top ranked universities. The libraries of eight universities were informally compared by reviewing their respective websites. Three cartographic related aspects were the focus of this review: (1) technology, (2) map related services, and (3) legislation.The findings identify cartographic services and also highlight differences, especially between the libraries in South Africa and those in international countries. The results indicate that while South African libraries are known to have map collections, online services, in the form of digital maps and geospatial data, are not readily accessible. Furthermore, the researcher suggests that there is a need for research that focuses on Geographic Information Librarianship and the GIS Librarian in SA