江苏沿海滩涂围垦生态重构关键技术及示范

在对现有沿海滩涂植物资源调查分析和耐盐植物新品种选育基础上,提出江苏沿海典型滩涂围垦区域生态重构关键技术,包括堤外原生湿地加速滩涂淤积关键技术、垦区海堤生态重构关键技术以及垦区堤内湿地生态建设等关键技术,并对其进行集成示范,为江苏沿海滩涂围垦与开发利用提供技术支撑。     

创建“大鹏国家级生态共生区”的探讨

珠江三角洲地区是中国改革开放以来经济发展最快的地区之一。伴随经济的发展,其资源存量和环境质量目前面临较大的生态安全风险。本研究以深圳大鹏地区为核心,聚焦深圳、香港、惠州在内的珠江三角洲东部区域生态系统,研究该区域社会、政治、经济、自然资源与环境的广义生态系统的演变,提出创建"大鹏国家级生态共生区"的建议,并分析了其现有基础条件,探讨了创建大鹏生态区需关注的重点领域。该建议以建设资源节约型和环境友好型社会为目标,通过建立一个社会、经济、自然资源可持续发展的广义生态系统的示范,探索经济与资源和生态环境系统和谐统一的发展模式。大鹏生态区的建立,对该地区加强城市环境危机管理和维护其生态系统稳定、安全将起到积极推动作用,并从生态角度提供城市区域发展的创新型模式。     

浅析城市生态系统特征

系统阐述了城市生态系统的特征,城市是一个复合的生态系统,具有人工化倾向,是一个不完整的,不能完全实现自我稳定的生态系统,并受社会、经济等多种因素制约的生态系统,容易导致严重的城市生态环境危机。     

黑龙江省湿地资源及管理的景观生态学研究

为了科学解决黑龙江省湿地资源的管理问题,将黑龙江省湿地资源分为西部松嫩平原区、东部三江平原区、南部长白山区及北部大小兴安岭山区等四大湿地生态区,利用景观生态学的原理分别对四大湿地生态区进行景观格局的分析,提出进行生态管理的办法。     

安徽省湿地生态旅游资源开发初探

分析了安徽湿地生态旅游资源的特征和开发利用现状;认为安徽省自然条件优越、湿地资源丰富,具有开展湿地生态旅游得天独厚的条件,湿地是安徽省开展休闲娱乐、科学考察及生态旅游的重要场所;建立了安徽湿地生态旅游资源开发利用模式,提出了安徽省湿地旅游开发与生态环境保护协调发展的途径。     

Unraveling determinants of inferred and stated attribute nonattendance: Effects on farmers’ willingness to accept to join agri-environmental schemes

Attribute nonattendance (ANA) has received very little attention in the context of willingness to accept (WTA), although an increasing number of studies analyze the preferences of ecosystem service providers toward incentive-based schemes. We add to the understanding of ANA behavior by analyzing stated and inferred ANA in a choice experiment investigating farmers’ WTA for participating in agri-environmental schemes (AES) in southern Spain. We use mixed logit models, following Hess and Hensher for the inferred ANA approach. Evidence is found of ANA behavior for both stated and inferred approaches, with models accounting for ANA clearly outperforming those that do not account for it; however, we produce no conclusive results as to which ANA approach is best. WTA estimates are only moderately affected, which to some extent is consistent with the low level of non-attendance found for the monetary attribute. Stated and inferred approaches show very similar WTA estimates. Additionally, we investigate sources of observed heterogeneity related to ANA behavior by using a sequence of bivariate probit models for each attribute. Overall, our results hint at a positive relationship between ease of scheme adoption and nonattendance to attributes. However, further research is still needed in this field.     

The economics of markets and platforms

Advances in the study of both markets and platforms contribute to economics. Platforms are typically digital markets, although platforms can designate markets generally. So, the economics of markets and the economics of platforms are one and the same. Platforms show the critical role of intermediaries in endogenous price adjustment and market clearing. The platform model remedies problems with general equilibrium analysis by combining and extending the basic Walrasian and Marshalian market models. The analysis of platforms provides explanations for the bid–ask spread, including market power, search costs, matching costs, adverse selection, and moral hazard. The study of platforms demonstrates the importance of participation and coordination in the formation of markets. The discussion emphasizes that platforms have significant implications for the theory of the firm. The analysis further considers how platforms affect innovation and entrepreneurship.     

Entrepreneurial ecosystems and the public sector: A bibliographic analysis

Entrepreneurial ecosystems represent an active and growing area of research. Recognized as a contributor to foster regional competitiveness by stimulating economic growth and promoting innovativeness, interest in the concept spans across disciplines. Despite evolving and inter-disciplinary discussions on entrepreneurial ecosystems, a comprehensive understanding of the research directions and latest developments in the field is elusive. At the same time, a clear understanding of the current lay of the land is necessary to assist in public sector decision-making and policy development. To address this gap, this bibliometric study presents a bibliographic analysis of extant literature in the field, as referenced as the focal topic of concern in academic journal articles spanning 1995–2019. The aim is to provide an overview of the origins of the entrepreneurial ecosystems concept in literature, to offer insight into key concepts that have emerged in research over the past twenty-five-years. The paper employs bibliographic techniques to track knowledge, identify trends, and highlight the primary emerging patterns and conceptual clusters. The analysis offers a map of the covered territory and facilitates the identification of gaps and under-researched areas in the field, with a particular focus on public sector interaction. Using the visualization of similarities, VOSviewer, software tool, citation, co-citation, co-authorship, as well as the co-occurrence of keywords are presented to offer a comparative overview of the diverse representation of entrepreneurial ecosystems developments across disciplines, countries, institutional clusters, networks and teams.     

城市生态空间与空间生态化——兼论抚顺采矿区生态重构与城市复兴

针对空间规划中生态空间难以进行功能取舍与组织实现,我们从生态哲学的基本问题出发,认为生态价值的判断仍然是基于人的自身价值观产生的,因此生态格局除了识别,是可以构建和重构的。基于此认识,我们抓住抚顺采矿区的问题核心与城市特色,通过整理采矿区工业遗存的文化价值、周边山体以及可建设廊道的生态环境价值,面对矿区功能结构现实,充分尊重自然,尊重历史,尊重现实;而又很好的借鉴了国外经验和成果,得到生态需要空间的核心思想,将之与抚顺采矿区的生态恢复和城市复兴相结合,有机衔接工业文明与生态文化。遵循生态安全、生命安全至上的原则,将历史文化的保留与景观构建相结合,寓景观生态学思想于退化生态系统恢复过程;以抚顺市棚户区改造、工人就业安置、保障性住房为出发点,融社会问题的解决于生态修复、环境整治的过程,设计了一条可持续性生态重构的有效途径,并得到以工代赈的实际措施。