Relationships between macroinvertebrate communities and land use types within different riparian widths in three headwater streams of Taizi River, China

Developing a Modified Umbrella Index for Conservation of Macroinvertebrate Diversity in Taizi River Basin, China

“…The significant variations in macroinvertebrate abundances and distributions were also explained by environmental variables. Like potential umbrella species, the abundance and distributions of co-occurring species were associated with relatively larger natural areas, higher elevation and DO, lower percentage of sand in the substrate, EC, SS, NH 3 -N and NO 2 -N. The association of macroinvertebrate communities with nature land is consistent with the literature, which reports a significant trend linking a relatively low proportion of farmland with more integrated macroinvertebrate community [51]. Obviously, our sampling sites at high altitude are mostly located in forest zone and head-water areas, which are more pristine, while sites at low altitude tend to be in proximity of farmland and urban areas.…”

Determining the macroinvertebrate community indicators and relevant environmental predictors of the Hun-Tai River Basin (Northeast China): A study based on community patterning

“…The substrates in the HaichengHe, LanHe and XiHe Rivers were not monitored in summer 2009. Finally, the proportion of each landuse type was extracted over 3 km upstream and 500 m wide buffer zones (Zhang et al, 2013) from a digital landuse map using ArcGIS 10.2. The landuse map was interpreted from landsat TM data of the year 2010.…”

“…For instance, more than 40% of the rivers in China are notably polluted, which has led to poor drinking water quality for approximately 300 million rural residents (Liu and Yang, 2012). The river ecosystems in the northeast have also degraded due to industrial and agricultural development; thus, some river restoration work has been conducted in this area (Kong et al, 2013;Zhang et al, 2011;Zhang et al, 2013). The Hun-Tai River Basin is a large river basin with a basin area of 2.73×10 4 km 2 .…”

“…It represents the overall status of the water in the Liaohe River Basin in northeast China and is undergoing degradation. Many field surveys and studies using macroinvertebrates as important indicators in river health assessments showed the ecosystem were not in good conditions (Qu et al, 2016;Zhang et al, 2011;Zhang et al, 2013). However, most of these studies have mainly focused on small rivers or tributaries, and cannot reflect the overall status of the whole watershed, especially in such a large river basin.…”

Community structure and biological integrity of macroinvertebrates in the wet and dry seasons of Wei River basin, China

“…Key Words: biological integrity; macroinvertebrates; principal component analysis; canonical correspondence analysis; community structure 河流生态学研究中,水生生物的调查与分析是重要环节 [1] ,其中大型底栖动物是研究的热点和焦点 [2] 。 大型底栖动物是河流生境中分布最广泛的物种之一,也是河流生态系统的重要组成部分 [3鄄 4] 。 大型底栖动物 通常以藻类、有机颗粒和凋落物为食 [5] ,并为河流中鱼类提供食物来源,对河流生态系统的物质循环和能量 流动起重要的作用 [6] 。 大型底栖动物的群落组成决定了河流中物质循环和能量流动的方式 [7] ,因而大型底 栖动物群落生态学研究对河流的保护、利用和管理具有指导作用 [8] 。 在河流健康评价研究中,生物完整性评价( IBI) 应用得较为广泛 [9鄄 11] ,目前已经成为国内河流健康评价研 究的主要手段。 在相对集中的时间段内,对某流域进行 1 次水生生物采样调查,构建生物完整性评价体系,进 而完成全流域的健康评价,是目前国内通常采取的研究方法 [12鄄 14] 。 然而,一次调查结果存在较大偶然性,尤 其是在受水文过程( 如水量) 变化影响显著的河流生态系统,这种偶然性便更为突出。 重复的采样调查,特别 是在不同的水文过程时期进行采样调查,将会使评价的结果更具准确性和重复性 [15] [22] ,测定以下水化学指标:悬浮物( SS) 、总溶解固体( TDS) 、硅酸盐( SiO [2][3][4] 水生昆虫主要由 EPT 类( E:Ephemeroptera;P:Plecoptera;T:Trichoptera) 和双翅目的摇蚊幼虫组成,其中 EPT [24] ,辽河流域枯水期( 5 月份) 的底栖动物种类数最大值、最小值及中值均小于丰水期( 8 月 份) 。 渭河流域底栖动物在枯水期、丰水期两季种类、生物量、多样性变化上和辽河流域表现出相同的特征, 但因为地理区域的差异性,其密度变化则呈现出不同的结果。 渭河流域枯水期的生物密度与丰水期差异不明 显,略有下降趋势;而辽河流域枯水期的生物密度则明显大于丰水期,且变幅较大 [24] 。 渭河干流地区水土流 失严重,河底淤积大量泥沙,流域内的泾河和洛河水系的底质又是以基岩( bedrocks) 为主,由于水流速度大, 侵蚀作用强,所以很少有河流冲积物覆盖 [25] ,有时甚至在河床中露出基岩,致使底栖动物很难固着并生活其 上,进而在丰水期、枯水期两季转换中,底栖动物密度呈现出下降趋势。 辽河流域的底栖动物类群中,双翅目 种类为优势类群 [26] ,虽然其他种类密度有下降趋势,但由于该流域枯水期河流营养盐浓度加大,水中双翅目 在国内外 B-IIBI 评价中,通常采用一次评价 [31] 或者年跟踪评价 [32] ,而在相同点位从季节水量变化角度…”