Biotic affinities of rocky reef fishes,invertebrates and macroalgae in different zones of the Port Davey marine protected area,south‐western Tasmania

• 1. Assemblages of fishes, invertebrates, and macroalgae showed strong and predictable distributional patterns within the newly declared Port Davey marine protected area (MPA) in south‐western Tasmania. Biotic assemblages in the eastern estuarine section of the MPA within Bathurst Channel were extremely anomalous, both in relation to biota elsewhere in the Port Davey region and also to those present along the wider Tasmanian and Australian coasts. Much of this variation was due to the phenomenon of deepwater emergence, with species in 5 m water depth in eastern Bathurst Channel possessing a mean maximum recorded depth of 200 m, compared with<80 m for the same metric when calculated for sites studied elsewhere around Australia. Deepwater emergence in Bathurst Channel was particularly notable for sessile organisms, although also evident among fishes and mobile macro‐invertebrates.
• 2. Quantitative baseline surveys of reef‐associated species were undertaken at sites interspersed among MPA management zone types and biotic community types, thereby providing an appropriate benchmark for assessing ecological changes in different management zones within the Port Davey region through the long term. Distinctive biota present in eastern and western Bathurst Channel, and eastern Port Davey, are well protected within ‘no‐take’ sanctuary zones; however, a bias in location of sanctuary zones towards areas with little fishery resources resulted in less protection for the western Port Davey biota, which also extends along the open coast. Although the lack of high level protection for sites with fishery resources detracts from conservation goals, the Port Davey MPA nevertheless represents a major advance in environmental protection because the ecologically unique, fully protected locations are a necessary inclusion within any comprehensive Australian MPA network. Copyright © 2009 John Wiley & Sons, Ltd.

     

图书馆员的非语言交流运用探讨

简述了非语言交流度其分类、特点,对图书馆员运用非语言交流的重要性、在具体运用中起到强化语言交流的效果、树立图书馆员良好的形象、建立与读者的融洽关系,从而提高服务质量以度不宜使用的非语言等问题进行了初步探讨。     

新疆荒漠化防治与持续发展的关键一环

荒漠化是制约新疆持续发展的关键。从６×１０４ｋｍ２绿洲的人均、亩均水资源占有量现状看，新疆水资源是比较丰富的；但从１６０×１０４ｋｍ２国土的长远持续发展和荒漠化防治来看，新疆水资源不仅量少而且分布极不均匀，属全国最缺水的省区。节水是新疆的当务之急，然而调水却是新疆持续发展的长远之计，因此也必须纳入议事日程予以考虑     

中法两国花艺交流现状与特点初探

通过对中法两国花艺交流活动的总结和分析，归纳其特点，并指出存在的问题。在研究和阐明其发展趋势的同时，提出通过文化互动促进共建和谐花艺生态体系的建议。     

游憩生态冲击与可持续发展

全球最大产业之一的旅游游憩业正面临着严峻的挑战,在环境保护尤其是对自然原野地的生态可持续发展议题上受到越来越多的关注,研究游憩、环境与可持续发展应从以下四个方面予以考虑(1)原野地的生态属性;(2)游憩活动对原野地生态属性的冲击;(3)游憩冲击的监测;(4)游憩冲击的生态管理。     

Identifying the Core Periodical Literature of the Agricultural Communications Documentation Center

ABSTRACT

“Agricultural communications” is an emerging field which is naturally both part of the “agriculture” and “communications” literature. However, it is much broader than just a subset of each. The coverage of standard databases such as CAB Abstracts and Communication Abstracts, while a good start, does not sufficiently cover the field. The Agricultural Communications Documentation Center (ACDC) at the University of Illinois at Urbana-Champaign has, over the last quarter century, worked to help define and collect this literature, by identifying relevant documents and entering them into a Web-searchable Microsoft Access database. An analysis of this database reveals important clues concerning the literature of agricultural communications. Of the nearly 30,000 documents within the ACDC collection, periodical articles comprise a little over one half, from a core list of 45 periodicals within the ACDC collection. More than one half of these core periodicals are outside the traditional agriculture and life science literature; approximately one third are scholarly journals.