超积累植物在时空、科属内的分布特点及寻找方法

探讨了超积累植物在时空、科属内的分布特点和正常植物演化出镍超积累特性必备的 2个基本条件 ,介绍了国外 2种常用的寻找超积累植物的方法。     

《巴黎协定》时代的气候融资:全球进展、治理挑战与中国对策

本文首先辨析了"气候资金"与"气候融资"两个基本概念,且通过对包括《巴黎协定》在内,最新的气候资金相关法律文件、信息通报、文献资料、智库报告的研究和系统梳理,指出全球气候融资发展趋势表现在全球气候融资缺口正在持续扩大;资金来源更加市场化;发展金融机构募集、管理和分配了大部分的公共资金;新型经济体用款权受到挤压,也呈现出更大的出资潜力;稳定的碳价格被认为是全球实现"零排放"长期减排目标的核心机制。与此同时,气候资金治理体系也处在关键的转型期,目前气候资金治理正在向"自下而上"的模式过渡,《公约》外平台承担了"气候风险主流化"的多重功能,但需要警惕"自下而上"的治理模式有绕过"共同但有区别责任"的风险,且绿色气候基金运作规则的导向性作用值得关注。据此,本文在最后提出了一系列治理建议。建议我国应积极影响国际气候资金机制运营规则和技术规则的制定,避免发达国家以及代表其利益的国际组织制定的标准片面地发展为国际规则;支持在全球设定渐进的、可预测的、可信的碳价格,并且肯定将气候与环境风险因素内生化的核心思想理念;与绿色气候基金开展多方位合作,推动气候公共资金治理规则转型;加强与世界银行在气候融资领域的合作;借G20平台逐步发展为气候融资政策突破和工具创新的引领者。     

Establishing a measurement,reporting, and verification system for climate finance in post-Paris agreement period

The measurement, reporting, and verification (MRV) of climate finance was originated from discussions under the United Nations Framework Convention on Climate Change (UNFCCC). It has been one of the key issues of global climate negotiations since 2009 and will continue to be of significant importance in addressing climate change and strengthening international trust. This paper analyses the concept, the objective, and the progress of the MRV of climate finance based on reviews of the latest literature and think-tank reports regarding climate finance regime and MRV. Following the analysis, challenges faced with the MRV of climate finance are illustrated. This paper presents that the comparability of climate finance data needs to be improved due to the variety of methodologies used for disaggregating climate finance. In addition, the integrality of the MRV system of climate finance has been impaired by the lack of feedback mechanism from the recipients to the contributors in reporting system. Furthermore, although accounting system of climate finance has been developing and improving, it remains incapacity in providing accurate data on disbursed climate finance. Responding to the above challenges, this paper proposes the key tasks in establishing a comprehensive MRV system for climate finance at international level. The tasks involve developing a measurement system with consistent data basis and accounting basis, a reporting system with more detailed guidance and standardized formats, as well as a verification mechanism balancing top-down and bottom-up review processes. In the last section, this paper concludes that the establishment of an improved MRV of climate finance requires concerted cooperation and negotiations between developed and developing country Parties under the UNFCCC. As one of the few developing country donors to the Global Environmental Facility (GEF), China is suggested to clarify its propositions as a developing country in aspects such as concept, coverage, and architecture of climate finance and MRV system, and gain bargaining power in improving operating and technical rules of international climate finance regime.     

Firms' and states’ responses to laxer environmental standards

On June 1, 2017, President Trump announced the United States' withdrawal from the Paris agreement on climate change. Despite this decision, American firms continued investing in low-carbon technologies and some states committed to tougher environmental standards. To understand this apparent paradox, this paper studies how a weakening of environmental standards affects the behavior of profit-maximizing firms. It finds that a relaxation of emission standards (i) may increase firms’ incentives to adopt clean technologies, but not to pollute less; (ii) may negatively affect industry profitability if it is perceived as temporary; and, when this is the case, (iii) the unilateral adoption of stricter standards by large states may increase the expected profitability of every firm.     

植被演替下植物组成多样性和群落稳定性与土壤团聚体的关系

为揭示植被自然恢复过程中植物组成多样性和群落稳定性与土壤团聚体的关系,防治水土流失,提高土壤质量.通过野外调查采样,确定并分析黄土高原近150年植被演替不同阶段的植被特征与土壤团聚体数据.结果表明:该过程共有种子植物39科99属128种,优势科是菊科、蔷薇科、禾本科和豆科,优势属是蒿属,单种属是该过程植物属的主体,出现频率较高的植物有大披针薹草、胡枝子、白刺花、水栒子、青蒿、虎榛子、辽东栎、茶条枫、油松、绣线菊、狗娃花等.植物地理成分在属级水平上有11个分布区类型8个变型,温带性质明显,热带性质（R值）与温带性质（T值）的比值（R/T）随恢复年限的增加而降低,R值与R/T值显著正相关,热带成分扩散分布受到限制.植物丰富度呈单峰曲线,在恢复年限为40～70年时最高.依照不同恢复年限对群落稳定性进行排序:70>120>135>150>40>10>20>0年.R值与植物种系分化度（SD值）极显著正相关,T值与稳定性极显著正相关.>5mm粒径团聚体与受热带性质物种驱动的植物丰富度有关.>0.25mm粒径团聚体总体上与群落稳定性保持一致,均受...     

重庆三峡库区重楼属药用植物资源调查

经调查鉴定,重庆三峡库区有重楼属药用植物6种9变种,其中以巫溪分布的种类最多,华重楼、七叶一枝花分布最广。重点介绍了它们的地理分布、资源状况及其开发前景,为更好地开发利用三峡库区重楼属药用植物资源提供科学依据。     

好氧反硝化菌种DF2的分离鉴定及生理生化特性分析

分离了新型的高效反硝化细菌并研究其生物脱氮效率。通过观察形态学、生理生化鉴定和16SrRNA基因同源分析来鉴定菌种,致力于研究微生物污水脱氮处理的实际效果和克服反硝化过程中有害中间产物的积累。利用BTB培养基从水平潜流人工湿地基质中初步筛选出了9株平板阳性菌,革兰阴阳性均有。经试验研究发现该9种菌株在好氧条件下均具有一定的脱氮能力,其中以DF2和DF3 2种菌株脱氮能力最为显著,在3 d时间内NOX--N去除率达到了95%以上,NO2--N仅有微量积累;而其它7种菌株对NO3--N的去除率可以达到98%以上,但是NO2--N积累比较严重,积累量达到了NO3--N去除的50%~70%左右。经测序分析鉴定DF2和DF3分别属于德克斯氏菌属(Derxia)和假单胞菌属(Pseudomonadaceae)。德克斯氏菌属作为除氮的反硝化菌属在以往的研究中鲜有报道,该菌在好氧条件下可以合成周质NAR的亚基基因(napA)。     

Waste Management and Climate Change

Waste management has at least five types of impacts on climate change, attributable to: (1) landfill methane emissions; (2) reduction in industrial energy use and emissions due to recycling and waste reduction; (3) energy recovery from waste; (4) carbon sequestration in forests due to decreased demand for virgin paper; and (5) energy used in long-distance transport of waste: A recent USEPA study provides estimates of overall per-tonne greenhouse gas reductions due to recycling. Plausible calculations using these estimates suggest that countries such as the US or Australia could realise substantial greenhouse gas reductions through increased recycling, particularly of paper.     

协同治理:2030年可持续发展议程与应对气候变化的国际制度分析

对国际议程间的关联性分析已经成为全球治理中的重要问题。特别是,由联合国引领的全球发展与应对气候变化问题,已经占据了当前国际政治议程的首要位置,两者的协同直接影响到全球治理的有效性。《2030年可持续发展议程》与《巴黎气候协定》不仅具有共同的规范性基础,而且两者通过议题衔接和叠加已经形成了密切的治理关系,国际制度关联性日益突出。从目前来看,这种关联性体现了以下特点:第一,嵌入关系。可持续发展议程的目标之一是应对全球气候变化,《巴黎协定》的治理目标已经嵌入联合国可持续发展议程之中,但也与一些目标存在矛盾,因此,协同治理具有必要性。第二,指标对应。《巴黎协定》下的“国家自主贡献”细化项目与可持续发展议程中的大部分指标已经形成对应关系,治理具有同质性。第三,制度间倡议交叉与功能外溢。其协同治理关系具体表现在诸多层面上,特别是在联合国系统内的协调、治理模式的趋同、资金渠道的整合、围绕联合国可持续发展议程所进行的发展机构改革,以及联合进行政策倡议、规则建构及政策制定等方面。从制度关系演变的角度来看,两者协同治理的类型正在发生变化,制度互动在不同层次上不断累积,并逐渐转向伙伴型的协同治理模式。     

Ecological Analysis of Spleen Hypertrophy in Cyclomorphic Rodents Taking into Account the Type of Ontogeny

The functional approach at the level of physiological functional groups (PFGs) reflecting two types of ontogeny was used to analyze spleen hypertrophy in five species of rodents. In addition to a wide variation of spleen weight, its hypertrophy was observed: in bank voles (Clethrionomys glareolus), the spleen weight was as great as 3.5 g versus the normal value of 100–150 mg. The variation range of the relative spleen weight was estimated. For example, in the dominant species, C. glareolus, this range was considerable (from 2 to 125). A distinct relationship with the types of animal ontogeny was revealed. The genus specificity of the phenomenon—its occurrence in three species of Clethrionomys voles and absence in Microtus voles and mice—was determined in the study region. The animals with normal and hypertrophied spleens did not differ from each other significantly in their vital activity (at least, with respect to the parameters studied). The voles with hypertrophied spleens normally reproduced, and the hypertrophy was asymptomatic. These findings suggest that the populations have adapted to a damaging factor (or factors) in the course of a prolonged coevolution. This parameter is regarded as the indicator of the presence of a damaging factor in the population.