生态文明理念下的国土空间均衡：基于两种财富的分析框架     

易家林  郭杰  林津  欧名豪 《地理研究》2022,41(4):945-959

国土空间均衡是生态文明建设与国土空间治理的重要目标。本文首先在“两山”理论与强弱可持续理论的指导下,基于生态财富与物质财富的二分法,探究国土空间均衡的内涵要义及状态评估模型;其次,通过生态财富与物质财富的特性差异及互动机制分析来探讨国土空间均衡的实现机制;最后,基于具体国土空间单元均衡状态的演进分析,研究整体国土空间均衡实现的可行路径。结果显示：① 基于两种财富的国土空间均衡的内涵即人均物质财富以及人均生态财富在空间上的双收敛,且各空间均收敛于较理想的水平值。② 整体性的国土空间均衡状态将会出现“一均衡、三失衡”四种情形。促进两种财富的良性互动,增强协同效应,减少权衡关系,是实现国土空间均衡的关键。③ 国土空间单元的均衡状态可划分为低等均衡或全面失衡、发展失衡、生态失衡、协调均衡四种,促进各具体国土空间单元向高阶均衡状态演进是实现整体国土空间均衡的可行路径。依循两种财富的互动机制与国土空间单元均衡状态的演进规律来指导具体国土空间单元的开发与保护,有利于实现整体的国土空间均衡。  相似文献   

净初级生产力的人类占用研究进展   总被引：1，自引：0，他引：1  

张燕杰  武俊喜  潘影  张宪洲 《地理科学进展》2022,41(2):341-350

人类活动对生态系统的影响和改变已达到前所未有的程度,如何量化人类活动对生态系统的影响成为了生态学和地理学研究中的热点问题。净初级生产力的人类占用(HANPP)是量化人类活动对生态系统能量流的影响程度的指标。目前HANPP研究开始从理论和方法的讨论及案例研究,转向作为指标应用到生态学和地理学研究的诸多领域,其重要性日益凸显。因此,论文详细介绍了HANPP的概念和估算方法;综述了其主要研究进展;讨论了HANPP的优劣及其适用范围,并着重展望了其与生态系统结构、功能、服务、生物多样性、可持续发展和人类福祉等方面有关的未来具体研究方向和科学问题,以及如何运用其探讨人类活动对生态系统的影响机制。期望启发更多与HANPP有关的研究,推动人类活动对生态系统的影响研究向定量化、系统化及多学科交叉的方向发展。  相似文献   

Are We There Yet? NSW local governments’ progress on climate change     

Dale S.M. Fallon  Caroline A. Sullivan 《The Australian geographer》2014,45(2):221-238

Local governments are responding to top-down policy initiatives from both federal and State governments to reduce emissions, and adapt to any potential impacts of climate change. Although climate change is clearly a global problem, many of the solutions will be implemented at the local level. To explore this issue, the aim of this research was to examine regional variation in climate change response across New South Wales (NSW). To this end, between September 2010 and September 2011, we reviewed publicly available council and regional documentations for all NSW councils. The indicators of response examined were based on the NSW Greenhouse Plan (2005). These were awareness-raising, emissions reduction and adaptation planning. It was found that councils were undertaking many practical projects to fulfil the goals of this plan. As a result, they are abating significant quantities of emissions. Adaptation is progressing through the development of risk-based climate change adaptation plans. Councils are addressing particular areas of management, such as water management, assisted by guidelines which incorporate consideration for climate change as part of best practice. While overall responses to this threat are progressing, a distinct urban bias in action has been observed, due to biases in policy and funding arrangements.  相似文献   

Extension 3.0: Managing Agricultural Knowledge Systems in the Network Age     

Mark Lubell  Meredith Niles  Matthew Hoffman 《社会与自然资源》2014,27(10):1089-1103

This article develops the idea of “Extension 3.0” as an approach to agricultural extension that capitalizes on the network structure of local agricultural knowledge systems. Over the last century, agricultural knowledge systems have evolved into networks of widely distributed actors with a diversity of specializations and expertise. Agricultural extension programs need to manage these networks in ways that maximize the synergy between experiential, technical, and social learning. Using empirical research from California farmers, we highlight the structure of these networks within and across contexts, and the importance of boundary-spanning relationships. We provide some initial recommendations about actions needed to realize the goal of Extension 3.0, which is to deliver relevant agricultural knowledge to the right people, at the right time and place.  相似文献   

Molecular and biochemical tricks of the research trade: -omics approaches in finfish aquaculture     

PM Lokman  JE Symonds 《新西兰海洋与淡水研究杂志》2014,48(3):492-505

Profitability of fish farming can be undermined by a suite of biological constraints. Effects of these constraints on the biology of the animal, the functioning of a tissue, or the quality of the final filleted product can be detected with very sensitive hi-tech approaches, grouped by the term ‘-omics’. These -omics technologies further present powerful tools for the genetic selection of diverse traits and, as such, will contribute substantially to the future development of the aquaculture sector. Sustainability issues of importance to the industry, such as environmental impacts, use of therapeutants, fish health management and fishmeal replacement, can again be aided, at least in part, through the effective use of -omics technologies. It thus appears that -omics technologies may be a key tool for the responsible growth of intensive aquaculture in the 21st century. In this paper we review the current status of -omics technologies and the potential for application within the aquaculture industry.  相似文献   

Financial expansion and CO2 mitigation in top twenty emitters: Investigating the direct and moderating effects of the digital economy     

《Gondwana Research》2024

The top twenty carbon-emitting nations contribute around 80% to global CO₂ emissions. The transformation of business operations, products, and services through establishing a digital economy (DGE) might help these nations to accomplish Sustainable Development Goals (SDGs) and carbon neutrality. However, digitalization poses certain direct and indirect effects on the environment, and also emissions and digitalization levels vary across nations. Further, the decoupling of economic growth and emissions makes it very challenging to reduce emissions without decreasing economic growth. Against this background, this research assesses the impacts of DGE and financial expansion (FE) on emissions in the top twenty emitters by considering the direct effect of DGE as well as its indirect effects through economic growth. The newly proposed method of moment quantile regressions (MM-QR) is adopted to unveil the associations between variables by accounting for distributional and heterogeneous variations in variables from 2003 to 2019. The novel findings demonstrate that DGE significantly boosts emissions. However, the indirect effects of DGE on emissions through economic growth reduce emissions and thereby, stimulate environmental quality. Interestingly, both direct and indirect effects of DGE are noticeable only from quantiles 6 to 9 and these impacts exhibit an increasing trend. FE decreases CO₂ and uplifts environmental quality in all quantiles without much variation. Economic growth (GR) augments CO₂; however, the magnitude of its effects reduces from lower to upper quantiles. Population density (PDN) alleviates environmental deterioration and its effects intensify from lower to upper quantiles. Afterward, the Driscoll-Kraay (DK) regression test confirmed the results of the MM-QR. Based on these novel results, a policy framework is proposed to reduce electronic waste and accelerate digital penetration in different sectors of the economy to enhance resource-saving and achieve carbon neutrality.  相似文献