When biologists and engineers collide: Habitat conservation planning in the middle of urbanized development

The City of Austin, Texas, is one of the fastest growing metropolitan areas in the United States. It is also in one of the most biologically diverse terrestrial ecosystems in the world: the Balcones Canyonlands. Five cave invertebrates and two species of birds that inhabit the area are listed as threatened or endangered, two species of plants are candidates for listing, several others are considered rare and of concern, and a species of the salamander has also been proposed for listing. A habitat conservation plan, of national significance according to Secretary of Interior Bruce Babbit (Haurwitz 1996), has been under development for the last several years to conserve those endangered species through a 2400-ha system of preserves and to allow development to continue in more than 162,000 ha of surrounding area. The preserve system, comprising several units ranging in size from less than a hundred to several thousand hectares, would be bordered in many instances by developed areas. Development and maintenance of the infrastructure necessary for new and existing development, both commercial and residential, could have negated the biological value of the preserves (e.g., power-line corridors, water-treatment pipelines and facilities). The challenge of bringing this plan to fruition illustrates the complex biological, technical, and sociological context within which habitat conservation planning may occur. Resolving resource use conflicts of this nature have several commonalities that overarch these contexts. If recognized and addressed, one may move easily and foster positive results. These commonalities can be expressed as principles such as: relying on scientists to recognize, but not solve problems; acting before a scientific consensus is achieved; including human motivation and responses as part of the system to be studied and managed; and confronting uncertainty.     

Utility participation in a multispecies plan

Single-species listings under provisions of the federal Endangered Species Act (ESA) have caused, or have been accused of causing, significant regional economic impact. In an attempt to avoid such adverse effects on regional economic development, the state of California passed the Natural Communities Conservation Planning Act (NCCP) in 1991. It is a voluntary, consensus-based approach to balancing protection of sensitive biota and biodiversity with regional economic development. The pilot NCCP program for the conservation of several threatened, endangered, and category 1 species, plus an additional 35 coastal sage scrub-related species in southern California, was completed and submitted to the public for review and comment in December 1995. This program proposes the voluntary establishment of a 86,600-ha multispecies reserve system. Once completed, participating landowners will receive ESA Section 10(a) incidental take permits for present and identified future projects. Utility rights-of-way are incorporated into the program as important connective linkages between reserve units and other adjacent important habitat areas. All data and information regarding the proposed results of the NCCP are subject to change pending agency response to public comments on the draft Habitat Conservation Plan and joint EIR/EIS.     

离子色谱－原子吸收联用测定水体中的Fe（Ⅲ）和Fe（Ⅱ）

研究离子色谱（ＩＣ）与石墨炉原子吸收光谱（ＧＦＡＡＳ）联用测定水体中铁形态的方法。用Ｓｈｉｍ－ｐａｃｋ阳离子交换柱分离Ｆｅ（Ⅲ）和Ｆｅ（Ⅱ），用石墨炉原子吸收法检测，Ｆｅ（Ⅱ）和Ｆｅ（Ⅲ）的检出限分别为３．８ｎｇ／ｍｌ和７．７ｎｇ／ｍｌ。本方法已用于检测自来水和河水的铁的价态，取得了令人满意的结果。     

甘肃省悬钩子属植物资源分布及其开发前景初探

悬钩子属植物在甘肃共有３４种、８变种，分布于南秦岭山地、北秦岭山地森林、甘南山地森林、东祁连山林区、陇西、陇东黄土高原区及甘南高山草原区。大多数具可食性，具开发利用价值。建立悬钩子的栽培试验基地是保证原料供应的重要措施。通过对悬钩子产品的市场需求量及产品属类的评估，可望将其潜在的野生价值转变为实际生产力。     

电子去离子净水技术

概述了EDI净水技术的发展历程、原理、组件型式与性能     

Photochemical behaviour of the systemic fungicide carboxin

Irradiation of carboxin (1) with a 500 W UV lamp (filter Pyrex) in CH3CN leads to the products 3, 5-8, 12-14 depending upon the reaction conditions. All photo-products were isolated and characterized. Photooxidation occurred even if unsensitized, while photoalteration was very slow in the absence of oxygen. The main oxygenated-products 3 and 13 were also recovered under biomimetic conditions by exposure of an aqueous solution of 1 to sunlight.     

外来入侵物种空心莲子草光合日变化初步研究

外来入侵物种空心莲子草(Alternanthera philoxeroides)发生广、危害重的区域多为中国南方省市,2005年发现其已大面积入侵山东省济南市境内的小清河上游.测定了空心莲子草净光合速率、气孔导度和细胞间隙CO2浓度,并与同一生境的芦苇(Phragmites communis)和水芹(Oenanthe javanica)进行了比较.空心莲子草净光合速率日变化曲线为双峰型,最高峰值24.40μmol CO2/(m2·s)出现在10:00左右,第二峰值22.80 μmol CO2/(m2·s)出现在16:00左右,整个曲线明显高于对照植物芦苇和水芹.在16:00至16:30光强迅速下降阶段.其净光合速率仍能保持较高水平,为9.85 μmol CO2/(m2·s).     

Organic compounds in the flue gas from a power station with circulating fluid bed combustion of coal

Numerous organic compounds have been analyzed by coupled gas chromatography-mass spectroscopy (GC-MS) in flue gas after fluid bed combustion of four coal species from South Africa, Poland, Spitsbergen and Ruhr area (Germany). Polynuclear aromatic hydrocarbons, aliphatic hydrocarbons, chlorinated, heterocyclic and nitro compounds as well as phthalate esters are detected.     

绿化树种对大气金属污染物吸滞能力

研究测定了部分城市绿化树种对重金属大气铅、镉污染物的吸滞能力。结果表明：绿化树种对大气铅、镉污染物具有一定的吸收净化能力，并依污染气体和树种的不同具有明显差异；对铅吸收量高的树种有：桑树、黄金树、榆树、早树、梓树；吸镉量高的树种有：美青杨、桑树、早树、榆树、梓树、刺槐。     

我国珍贵树木保护中若干法律问题的思考

保护珍贵树木具有十分重要的意义,本文从立法、司法的角度,归纳了当前我国保护珍贵树木的法律制度及相关的法律责任,对于进一步完善与珍贵树木保护相关的法律规定提出了自己的设想.