The Influence of Hydraulic Stress on Microdistribution Patterns of Zoobenthos in a Sandstone Brook (Weidlingbach, Lower Austria)
The Influence of Hydraulic Stress on Microdistribution Patterns of Zoobenthos in a Sandstone Brook (Weidlingbach, Lower Austria)
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水应力对砂岩溪底底栖动物微分布模式的影响（魏德林巴赫，下奥地利）
DOI：
10.1002/iroh.19980830506
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发表时间：
1998
影响因子：
1.9
通讯作者：
J. Waringer
中科院分区：
文献类型：
--
作者：
B. Möbes;J. Waringer
在维也纳(奥地利)附近Wienerwald地区的一条低级森林溪流Weidlingbach，在1995年3月至9月期间从其采集底栖动物标本(=33318个大型无脊椎动物标本)的112个地点测量了水力应力。为了测量水力应力，使用了一组FST半球。所研究的种类最丰富(占总数的90.7%)是Gammarus fossarum Koch(端足目)、Leuctra spp.(Plecoptera)、短翅目Baetis rodani(Pictet)、短翅目B.vernus(Curtis)、疑似哈氏小卷蛾和Jacob、星纹夜蛾Ecdyonurus starmachi Sowa和不稳定叶蝉Hydisopae disablis(Curtis)。
5种蚂蚁、4种石蝇和6种石蝇显著偏爱研究区的热带亚种(P<；0.001)，而丹尼卡·穆勒显著偏爱热带亚种(P<；005)。
在详细研究的物种中，其FST半球的中位数从8(如Brachyptera risi(Morton))到2(如Paraleptophlebia subbrenata(Stephens))不等。
在低流量和高流量下的微观分布模式的比较表明，FST半球的数量没有明显的变化，因此，在水力胁迫下，不稳定水栖动物和筋膜Rhyacophila Fasciata Hagen的数量也没有明显的变化；这两个物种在高应力区最丰富，与流量无关。另一方面，大多数其他被详细研究的物种在高流量时表现出向较低水力应力的转变，而电生植物ujhelyii(SOWA)在整个水力应力范围内均匀分布(p>；0.05)，与流量无关。
In the Weidlingbach, a low-order forest stream in the Wienerwald area near Vienna (Austria), hydraulic stress was measured at 112 locations from which benthic fauna (=33318 specimens of macro-invertebrates) was collected between March and September 1995. For measuring hydraulic stress a set of FST hemispheres was used. The most abundant taxa studied (= 90.7% of the total) were Gammarus fossarum Koch (Amphipoda), Leuctra spp. (Plecoptera), the ephemeropterans Baetis rhodani (Pictet), B. vernus (Curtis), Habroleptoides confusa Sartori and Jacob, Ecdyonurus starmachi Sowa and the caddisfly Hydropsyche instabilis (Curtis).
Five mayfly, four stonefly and six caddisfly taxa significantly (p < 0.05) preferred the lotic subsection of the research area, whereas Ephemera danica Muller significantly (p < 0.001) preferred the lentic subsection.
In the species studied in detail, medians of their FST hemisphere ranges varied from 8 (e.g. Brachyptera risi (Morton)) to 2 (e.g. Paraleptophlebia submarginata (Stephens)).
A comparison of microdistribution patterns at low and high discharge revealed no significant shift in FST hemisphere numbers and, hence, in exposure to hydraulic stress in Hydropsyche instabilis and Rhyacophila fasciata Hagen; both species were most abundant in high stress areas, independent of discharge. On the other hand, most other species studied in detail exhibited a shift to lower hydraulic stress at high discharge, whereas Electrogena ujhelyii (Sowa) was evenly distributed (p > 0.05) over the whole range of hydraulic stress, independent of discharge.