Sushi or Fish Fingers? Seafood Diversity,Collapsing Fish Stocks,and Multispecies Fishery Management*

We present a model of a multispecies fishery, and we show the following. (i) Consumer preferences for seafood diversity can trigger a sequential collapse of fish stocks under open‐access fishery. (ii) The stronger the preferences are for diversity, the higher is the need for coordinated multispecies regulation. (iii) Second‐best optimal management of only one (or a few) species is less strict than socially optimal management of the same species. (iv) Myopic regulation of one species, ignoring spillovers to other species, can cause depletion of other stocks that would not be depleted under open access.     

Constructing landscapes of value: Capitalist investment for the acquisition of marginal or unused land—The case of Tanzania

The current global wave of land acquisition – variously debated as land grabbing or investment in land – is promoted by the World Bank and the FAO as creating win–win-situations for local populations and investors alike. Common policy recommendations suggest expanding the production of export crops, by making use of marginal or unused land. Considerable potentials for such an expansion are assumed. Taking Tanzania as a case study, the evidence for such types of land is assessed by using a broad range of statistics. We will argue firstly, that the terms marginal and unused land serve as a manipulative terminology for the benefit of attempts to commercially valorize and commodify African landscapes, from biofuel to large-scale food production and tourism. However, they relate to different rationalities of domination. Unused land refers to a state-bureaucratic narrative, which excludes user groups deemed irrelevant for national development, while marginal land refers to a capitalist-economic narrative that excludes what is not profitable. Secondly, the terms are analyzed as categories central for state simplification of social relations attached to land. Modelling of these land use categories based on remote sensing is an attempt to compensate weak state capacities to enhance the legibility of the landscape by constructing it as a landscape of commercial value.     

生物多样性视角下城市闲置地的微更新 探索——以临时社区花园为例

生物多样性在城市环境中发挥着重要的作用。作为城市闲置地微更新的常见方式,临时社区花园能够带来很高水平的生物多样性和生态系统服务,是城市优化绿色空间的良好途径之一。社区花园在改善闲置地生境质量的同时,也受到植被结构和管理维护水平等因素的影响。通过对临时社区花园典型案例的分析,探讨了灵活的城市闲置地微更新方式在我国城市的适用性。     

走向可持续的工业遗产景观保护—— 英国布莱纳文工业景观保护实践

对可持续发展理论、工业遗产保护可持续发展原则 进行了分析。从景观概况,运营、范围、目标、策略、经济和 评估可持续方面对英国布莱纳文工业景观保护实践的经验、教 训进行了剖析。在此基础上,结合中国的国情、国策和现实问 题,从工业遗产景观保护的理论、制度、层级、目标、模式和 主体等方面对我国可持续的工业遗产景观保护路径进行了思 考,提出了在我国建立面向可持续的,地区发展综合目标、整 体系统规划管理、多元伙伴机制耦合的工业遗产景观保护新格 局的建议。     

加强项目管理 做好节能减排

针对沛城煤矿井筒冻结工程,项目部坚持以科学发展观为指导,认真贯彻《中华人民共和国节约能源法》和《江苏省省节能减排工作方案》,以提高能源利用率为核心,突出节能降耗,扎实推进节能减排工作的开展。本着让业主满意,竭诚为业主服务的原则,进行了周密、细致、科学的准备,全面加大新设备、新工艺的应用,注重新技术的创新,在节能、经济和环保的基础上确保工程安全顺利、快速施工。     

节水防污——小议城市水务管理

作者对目前城市水务现状进行剖析,分析了当前水务管理中存在的问题,并对节水、防污、供水质量与安全及供水服务管理方面提出了一些建议。     

盐腐蚀结构养护技术浅析

结合工程实例,分析了盐腐蚀砼结构病害的防治技术。     

价值工程在低碳建筑节能减排中的应用

文章结合价值工程在低碳建筑中的应用瓶颈及Dell Isola专家对价值工程的改进,引入建筑碳排放指数,推出应用于低碳建筑的低碳价值工程,并具体阐述了碳排放指数的计算方法。通过对低碳建筑的详细功能分析,文章继而介绍了采用AHP层次分析法计算价值系数的应用步骤,最终选择出满足功能良好、成本合适、碳排放量最少的方案,实现低碳作用。     

农地养护法律制度研究

本文旨在通过研究农地养护的法律制度,为维护和改善我国农地质量、确保粮食安全提供强有力的法制保障。主要运用实证研究方法和规范研究方法。研究认为法律制度对农地质量保护有着重要意义,但我国关于农地养护的现行立法在组织制度、经济激励制度、法律责任制度等方面还存在一些许多问题,影响了我国农地养护的实施效果。文章认为应进一步加强对相关制度的研究并提出了一些立法完善的思路。