Offshore marine conservation policies in the North East Atlantic: Emerging tensions and opportunities     

Elizabeth M. De Santo  Peter J.S. Jones 《Marine Policy》2007

An inherent tension exists between legal approaches to nature conservation and fisheries management in the European Union, as the former remains the remit of Member States while the latter is under the exclusive legislative jurisdiction of the European Community (EC). This tension is of particular importance when addressing the conservation of habitats or species that are under threat from fishing activities. This article examines recent developments in offshore marine conservation in the North-East Atlantic in light of the legislative developments and political frameworks that are currently evolving. By analysing the emergency closure of the Darwin Mounds area of cold-water corals and the UK pair-trawl ban, it becomes evident that the precautionary principle is a key factor in the tension between fisheries management and marine nature conservation, and is not always taken into account.  相似文献   

A macroscale analysis of coastal steepening around the coast of England and Wales   总被引：1，自引：0，他引：1  

J A Taylor  A P Murdock  N I Pontee 《The Geographical journal》2004,170(3):179-188

Coastal steepening potentially presents an array of management issues in the form of financial implications of sea defence degradation, increased risk posed to the hinterland as wave attenuation is reduced, 'coastal squeeze' and statutory requirements in the light of the Habitats Directive. The extent to which coastal steepening has occurred throughout England and Wales has been investigated through use of a GIS and dataset based on historical Ordnance Survey map information. Data were collected along 1084 selected profile lines, positioned so as to be geomorphologically representative of the coast. Features recorded from each map year included the positions of mean high water (MHW) and mean low water (MLW), the relative movements of which infer changing intertidal gradients. The results presented in this paper are on a subject and scale not previously published. It is revealed that 61% of the coastline studied has experienced a tendency towards steepening. Of the remainder, 33% has flattened, and 6% has experienced no rotational movement. This tendency towards steepening has been the dominant movement on each of the west, south, and east coasts.  相似文献   

深圳华侨城湿地鸟类多样性调查研究     

徐桂红  张小英  徐昇 《湿地科学与管理》2015,11(2):59-61

处于湿地食物链上游的鸟类可以作为整个生态系统多样性的一个代表,应用于湿地生态的监测与评价。2013年,对华侨城湿地鸟类进行了调查,共记录到鸟类12目34科104种,多样性指数为4.2317,较以前增多,并呈明显季节性变化。表明华侨城湿地生态修复效果逐步呈现,生态状况正在变好。  相似文献   

哀牢山云南松林冬季鸟类群落与地理环境的关系     

王直军 《云南地理环境研究》1989,1(1):61-70

本文运用了群落相似系数、种间相遇机率指数、生态位分布型和食性研究,观测分析了同一山体两侧山坡八块样地冬季鸟类群落状况。在哀牢山西坡观测到鸟类44种,东坡观测到28种,其中13种为两坡共有。西坡除种多样性较高外,鸟类生态类型也与东坡有别。所有这些差别与哀牢山地理位置,西南季风影响所形成的东西坡植被和气候等环境因素有关。文章还分析了人类活动对森林演替和鸟类群落的影响。  相似文献   

同心补偿式直升机时间域航空电磁法吊舱校准装置研究   总被引：3，自引：2，他引：1       下载免费PDF全文

王世隆  王言章  随阳轶  王琦  林君 《地球物理学报》2011,54(9):2397-2406

直升机间域航空电磁法(Helicopter-borne time-domain electromagnetic method,HTEM)的多次空中仪器校准可消除飞行过程中仪器系统受外界环境的时变影响.吊舱校准装置可解决地面环线方式无法实现的空中飞行过程中仪器校准问题.本文从研究同心补偿吊舱装置模型出发,提出了吊舱装置空...  相似文献   

达里诺尔自然保护区鸟类资源现状及变化分析     

杨凤波  宋丽军  武宏政  胡其图 《湿地科学与管理》2009,5(3):34-37

2006-2008年对内蒙古达里诺尔自然保护区的鸟类资源现状进行了调查研究。新记录鸟类43种,其中重点保护鸟类8种,增加4个新科15属,达里诺尔保护区鸟类达到233种,分属于16目42科113属。国家重点保护鸟类45种,鸟类区系以古北界中的蒙新区、东北区成分为主。主要分布于湿地、草原、沙地疏林和山地4种生态环境。  相似文献   

厦门下潭尾红树林修复区景观类型与鸟类群落动态     

刘劲涛  黄毓薇  黄智君  林清贤 《湿地科学与管理》2021,17(1):23-26

2018年10月—2019年9月调查厦门下潭尾红树林修复区鸟类群落变化,利用遥感图像解译红树林修复区景观格局,为修复区后续景观格局优化与鸟类保护提供技术支持。结果显示:修复区鸟类共有26科62种,鹭类(8种2047只)与鸻鹬类(16种786只)种类及数量较多。春季鸟类种数及数量最多,其中3月鸟类种数最多25种,5月数量最多828只。下潭尾修复区景观格局在低潮位与高潮位存在周期性变化,不同景观鸟类种类及数量有较大差异;鸻鹬类在低潮位时的种类较多但数量较少,高潮位时仅分布于高潮裸露湿地和建设用地。建议修复区增加鸻鹬类高潮停息的滩涂湿地及游禽类生活需要的生态塘区,进一步提高水鸟多样性。  相似文献   

基于水位控制的黄河三角洲退化滨海湿地恢复及其短期效应   总被引：1，自引：1，他引：0  

任葳  王安东  冯光海  赵亚杰  冉越男  刘晓玲  王光美  刘玉虹 《湿地科学与管理》2016,(4):4-8

针对黄河三角洲滨海湿地严重退化盐碱化问题,于2015年5月设计实施了微地形改造营造和水位控制相结合的生态恢复方案,并评估了恢复工程的初步效果。结果表明:生态工程实施3个月后,恢复区植被、水域和裸地面积发生显著变化,植被比例从18.8%上升到30.5%,水域比例从7.4%上升到53.2%,裸地面积从73.8%降低到16.3%,湿地的改善为鸟类提供了多样化的生境。底栖动物从无到有开始拓殖,至2015年9月已发现大型底栖动物14种。自2015年9月至2016年3月,共有35种鸟类,包括13种重点保护鸟类在该区域栖息觅食。相对于简单围封补充淡水的传统恢复方式,本研究设计的生态恢复方案效果更为显著,在该区的生态恢复和重建中具有一定的推广价值。  相似文献   

黄河三角洲温地鸟类名录     

贾建华  田家怡 《海洋湖沼通报》2003,(1):77-81

1996－1998年对黄河三角洲湿地鸟类连续进行了3年观察和调查，共观察到和鉴定出湿地鸟类199种，隶属于16目38科。  相似文献   

Remote sensing for mapping natural habitats and their conservation status – New opportunities and challenges     

《International Journal of Applied Earth Observation and Geoinformation》2015

Safeguarding the diversity of natural and semi-natural habitats in Europe is one of the aims set out by the Habitats Directive (Council Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora) and one of the targets of the European 2020 Biodiversity Strategy, and is to be accomplished by maintaining a favourable conservation status. To reach this aim a high-level understanding of the distribution and conditions of these habitats is needed. Remote sensing can considerably contribute to habitat mapping and their observation over time. Several European projects and a large number of scientific studies have addressed the issue of mapping and monitoring natural habitats via remote sensing and the deriving of indicators on their conservation status. The multitude of utilized remote sensing sensors and applied methods used in these studies, however, impede a common understanding of what is achievable with current state-of-the-art technologies. The aim of this paper is to provide a synthesis on what is currently feasible in terms of detection and monitoring of natural and semi-natural habitats with remote sensing. To focus this endeavour, we concentrate on those studies aimed at direct mapping of individual habitat types or discriminating between different types of habitats occurring in relatively large, spatially contiguous units. By this we uncover the potential of remote sensing to better understand the distribution of habitats and the assessment of their conservation status in Europe.  相似文献