Macroinvertebrate assemblages in relation to environments in the West River, with implications for management of rivers affected by channel regulation projects
Macroinvertebrate assemblages in relation to environments in the West River, with implications for management of rivers affected by channel regulation projects
复制标题
与西河环境相关的大型无脊椎动物群落，对受河道整治项目影响的河流管理的影响
DOI：
10.1016/j.quaint.2013.08.012
复制
发表时间：
2015-10
影响因子：
2.2
通讯作者：
Li Yiping
中科院分区：
文献类型：
--
作者：
Li Zhiwei;Lu Yongjun;Yang Wenjun;Li Yiping
河流具有多种服务功能，在人民生活和农业生产中发挥着重要作用。近几十年来，人类活动的加剧对河流生态系统造成了严重的威胁。在航运方面，沿沿着建造水利工程设施（如丁坝），以增加水深。然而，自然栖息地条件（即基质，流动状态，水的物理化学性质）相应地改变。因此，有必要选择具有代表性的生物作为指标，对不同生境条件下的水生态状况进行评价，并提出相应的管理对策。大型无脊椎动物通常被认为是环境长期变化的良好指标，因为它们局限于底部，生命周期长，运动能力有限。本研究于2009年11月（低水位）和2010年5月（高水位）对西江大型无脊椎动物进行了实地调查。共鉴定出大型无脊椎动物70种，隶属于30科59属。其中环节动物16种，软体动物21种，节肢动物32种，杂类动物1种。大型无脊椎动物总的平均密度和生物量分别为140 ind m− 2和0.23 g干重m−2。典型对应分析（CCA）结果表明，影响大型底栖动物群落结构的主要因子为流速（U）、水深（Z）、电导率（Cond）、总氮（TN）和底质（粘土、粉砂、卵石和基岩）。大型无脊椎动物的密度和多样性达到峰值的鹅卵石，而生物量达到最大值的基岩。稳定和异质的生境有利于底栖动物群落的发育。为了保护这些生境，丁坝的类型和建设位置应得到足够的重视。因此，建议在卵石、碎石覆盖的河床上，尽量少建丁坝。另外，还需要对丁坝与河岸的夹角进行分析，以产生合适的水流流态，防止稳定底质被泥沙掩埋。并对丁坝的长度和间距提出了建议。
Rivers have many service functions, and play an important role in people's living and agricultural production. During the last decades, intensive human activities have been threatening river ecosystem. For shipping, hydraulic engineering facilities (e.g. spur dikes) have been built along river bank to increase water depth. However, natural habitat conditions (i.e. substrate, flow regime, water physico-chemical properties) are accordingly altered. Therefore, it is necessary to select representative organisms as indicators to assess the aquatic ecological status of different habitat conditions, furthermore, management strategies are to be put forward. Macroinvertebrates are often considered as good indicators of long-term changes in environments due to their confinement to the bottom, long life cycles and limited abilities of movement. In this study, field investigations of macroinvertebrates in the West River were conducted in November 2009 (at low water level) and May 2010 (at high water level). Altogether 70 taxa of macroinvertebrates belonging to 30 families and 59 genera were identified. Among them were 16 annelids, 21 mollusks, 32 arthropods and 1 miscellaneous animal. The average density and biomass of total macroinvertebrates were 140 ind m−2and 0.23 g dry weight m−2, respectively. Canonical Correspondence Analysis (CCA) revealed that major factors structuring macroinvertebrate assemblages were flow velocity (U), water depth (Z), conductivity (Cond), total nitrogen (TN) and substrates (clay, silt, cobbles and bedrock). Density and diversity of macroinvertebrates peaked in the cobbles, while biomass reached the maximum in the bedrock. It is indicated that stable and heterogeneous habitats were beneficial to development of benthic assemblages. To conserve these habitats, type and construction position of spur dikes should receive enough attentions. Thus, it is suggested that as few spur dikes as possible can be constructed in the riverbed covered with cobbles and bedrocks. Otherwise, the angle between spur dike and river bank need be analyzed to generate the appropriate flow regime which can prevent the stable substrates from being buried by sands. Some advice about length and separation distance of spur dikes is also presented.
登录
查看更多内容
影响因子：
1.9
作者：
Min Zhang;Q. Cai;Yaoyang Xu;Linghui Kong;Lu Tan;Lan Wang
通讯作者：
Min Zhang;Q. Cai;Yaoyang Xu;Linghui Kong;Lu Tan;Lan Wang
DOI：
--
发表时间：
1974
期刊：
--
影响因子：
--
作者：
C. Hart;S. Fuller
通讯作者：
C. Hart;S. Fuller
影响因子：
4.8
作者：
D. Søballe;B. L. Kimmel
通讯作者：
D. Søballe;B. L. Kimmel
影响因子：
2.7
作者：
A. Brooks;T. Haeusler;I. Reinfelds;Simon Williams
通讯作者：
A. Brooks;T. Haeusler;I. Reinfelds;Simon Williams
影响因子：
--
作者：
Baozhu Pan;Haijun Wang;Xiao-min Liang;Hongzhu Wang
通讯作者：
Baozhu Pan;Haijun Wang;Xiao-min Liang;Hongzhu Wang