共查询到19条相似文献,搜索用时 187 毫秒
1.
鹤是湿地生态的重要指示物种。黄河三角洲生境多样性资源为鹤类栖息提供了优良的生态环境。但由于黄河三角洲湿地生态系统本身具有脆弱性、不稳定性、易变性的生态特点,在自然因素和人为因素的作用下,鹤类栖息生境常发生剧烈变化。本文从较长的时空尺度阐述了鹤对生境变化的适应性选择,介绍在生境退化、生态恶化区域实施的生境恢复与重建工作。 相似文献
2.
3.
4.
黄河三角洲是黄河携带大量泥沙填积渤海凹陷进行的冲积平原,海河相汇、泥沙沉积,形成了中国最年轻的湿地生态系统。受黄河和渤海的双重影响,黄河三角洲湿地形成了水库、近海滩涂、芦苇沼泽、河流、盐池、渔塘等多种湿地生态类型,有鹭类、雁鸭类、鹤类、涉禽(shorebird)等多种水鸟类型,黄河三角洲自然保护区、天鹅湖、广北水库及其周围渔 相似文献
5.
6.
7.
正银川享有塞上湖城之称谓,阅海湿地公园、鸣翠湖、鹤泉湖与黄沙古渡、艾依河与银川黄河湿地公园,湿地生态类型丰富,湿地面积近5万余亩。众多的湖泊湿地不仅为银川市民提供了休憩度假的去处,同时也改善了城市宜居环境,也为鸟类、渔类与各种湿地植被提供了繁衍栖息之地。阅海湿地公园,作为银川市湿地面积最大、原始 相似文献
8.
9.
10.
湿地是湿地乔灌木植物、在湿地中栖息的动物、湿地特有环境所培养的微生物等所组成的生态环境,具有生态价值。生境性湿地是多功能的,即维护生物多样性、净化调蓄水源、调节小气候等。 相似文献
11.
【目的】研究兴凯湖不同栖息地水鸟特别是濒危鸟类如鹤鹳类群落组成差异,为兴凯湖水鸟保护管理提供科学依据。【方法】于2014年5月至2015年4月、 2017年12月采用直接计数法对湖岗、龙王庙、东北泡子以及青山水库4个区域6类栖息地水鸟群落进行系统调查,并对水鸟群落特征参数进行分析。【结果】兴凯湖湿地内共记录水鸟7目11科85种364 063只。湿地内水域面积最大,物种数最多,多样性指数最高,以雁形目和鸻形目鸟类最多;林地与灌丛面积最少,物种数最少;灌丛多样性指数最低,以鹭科鸟类为主。在4个区域,湖岗水鸟多样性最高,其次是龙王庙和东北泡子,青山水库多样性最低。由于不同区域的栖息地组成不同,水鸟数量存在着显著性差异。【结论】随着兴凯湖栖息地类型的改变与人类活动的加剧,特别是作为鹤鹳类主要的繁殖地龙王庙与东北泡子,农田耕地面积增多,而沼泽湿地与草甸面积减少,使得鸭类与鹤类数量大幅减少。建议需根据不同水鸟对栖息环境的适宜性需求,制定科学合理保护方案,进行有效保护。 相似文献
12.
北海湿地保护区植被类型及其环境状况的研究 总被引:2,自引:0,他引:2
腾冲北海湿地属“漂浮状苔草沼泽湿地”,植被类型丰富,物种多样性程度高。由于过度的农田开垦和森林砍伐,加之外来有害物种的不断侵入,湿地生境改变,导致生态系统功能降低、生物多样性流失严重。通过对北海湿地植被资源与环境的调查研究,分析了北海湿地保护区的植被类型、环境状况及其保护对策。 相似文献
13.
IntroductionRed-crowned crane (Gms j'apenensiS) is a vulnerabfe species, which is now endangered enough to belisted in the name list of National First-grade Protected Wildlife of China. In recent years with the increasing of people's requirements for resource, the size ofhabitat used by red-crowned cranes has decreasedsuccessively as a result of mankind's excessive exploitation on resource with plundering and blindness.Popufations are also threatened seriously. So it isurgent to strengthen … 相似文献
14.
This paper studied the winter habitat selection of red-crowned cranes (Grus japonensis) in Yancheng National Natural Reserve, Jiangsu Province. There were six types of habitat used by red-crowned cranes, i.e.
salt-works, aquiculture ponds, reed lands, grassy tidal lands, salting wormwood lands and wheat fields. The wheat field was
a new type of habitat used by red-crowned cranes. More than 70 percent of red-crowned cranes chose grassy tidal lands, salting
wormwood lands, and reed lands as their most important habitats. In recent years, the distribution of red-crowned cranes moved
southward gradually. Red-crowned cranes prefer artificial or semiartificial wetlands rather than original wetlands, successive
distribution was broken into fragments.
The project is supported by Jiangsu Province
Zhang Honghai, male, born in July 1967, associate professor, Department of Biology, Qufu Normal University, Qufu 273165, P.
R. China.
Responsible: Zhu Hong 相似文献
15.
Nest-site selection patterns of Red-crowned cranes(Grus japonensis) and the effects of environmental variables were studied during the years of 2002-2008 in Zhalong Nature Reserve,Qiqihar city,northeast China.The nest-site selection pattern of Red-crowned cranes included two orders and three choices:the choice of nest-site habitat type within the macro-habitat order,nest zone selection and nest-site micro-habitat selection within the micro-habitat order.Various habitats(such as Carex swamps and reed fire districts) can be selected as the nest sites for Red-crowned cranes,of which reed swamps(93.15%) are given a preference.Factor Analysis reveals that the micro-habitat selection are affected by four main factors:fire,security(concealment /disturbance),incubation(conditions,nest-material),and food.Further analysis reveals that Red-crowned cranes have certain adaptability to the changes of nesting habitat quality in the Zhalong wetlands.In conclusion,fire,reeds,and water were the most important variables for nest-site habitat selection of Red-crowned Cranes in Zhalong Nature Reserve. 相似文献
16.
17.
《Scandinavian Journal of Forest Research》2012,27(1):22-32
Abstract Forest fragmentation increases the amount of edge habitats in landscape. Despite the profound ecological influences that edges may have, the patterns and processes of edge formation have largely remained unexplored. The aim of this study was to find answers to three questions: (1) How have the landscape structure and composition, as measured by different successional stages, changed over a period of about 50years in forested landscapes in southern Finland? (2) What are the differences in the amount of edge and interior habitat between successive years? (3) How does the forest ownership, state or private, affect the prevalence of edges? Digitized aerial photographs taken in 1941 and 1944 (period1), 1969 (period2) and 1997 (period3) were used to study the prevalence of different successional stages, area of interior mature forest and edge habitats in two nearby 10km2 forest areas with private and state ownership, respectively. The forest composition was similar in the two forest areas, with mature forests being replaced by younger development stages. The area of interior mature forest decreased dramatically from period1 to period2. Assuming an edge width of 100m, the proportion of edge habitat increased from 30% to 61% in the state forest and from 26% to 76% in private forest. The detected changes and their possible consequences to species suggest that management of different types of edges and converging edges should receive considerable attention in the future. 相似文献
18.
江西药湖湿地水禽栖息地保护与恢复规划设计 总被引:1,自引:0,他引:1
水禽栖息地的保护、恢复和重建是湿地生态系统研究的热点,也是湿地保护与恢复工程的建设重点.作者在分析江西药湖水禽栖息地退化过程及其驱动因子的基础上,提出了药湖水禽栖息地保护与恢复的技术思路和建设目标,并具体规划了以下项目进行江西药湖水禽栖息地的保护与恢复:一定规模的退耕还湿;水文联系与恢复重建;外源污染的控制和水质保育;水禽栖息地的严格保护与保育;水禽栖息地恢复与重建工程;水禽避难所和野外投食点建设;湿地植被群落和生物多样性恢复;湿地科研、监测工程. 相似文献