Channel change and vegetation diversity on a low‐angle alluvial fan, River Feshie, Scotland
Channel change and vegetation diversity on a low‐angle alluvial fan, River Feshie, Scotland
复制标题
苏格兰费希河低角度冲积扇的河道变化和植被多样性
DOI：
10.1002/(sici)1099-0755(200001/02)10:1
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发表时间：
2000
影响因子：
2.4
通讯作者：
H. Parsons
中科院分区：
文献类型：
--
作者：
D. Gilvear;J. Cecil;H. Parsons
1.费什河是一条蜿蜒的砾石河床河流，在与斯佩河汇合处有一个突出的冲积扇，形成了一个高度保护的重要性。费希河是英国相对自然的高度活跃的砾石床河流的最佳例子，该扇也包含苏格兰原始洪泛平原森林覆盖的少数遗迹之一。
2.河道转换和砾石坝形态的变化是这条河的一个典型特征。近年来，该河在冲积扇中占据了中心位置，直到1990年，该河的位置发生了重大变化，流向了冲积扇的南部。然而，河岸业主恢复了原来的渠道流量。1996年，在这项研究之后，该渠道再次改变了方向。这一次没有恢复到原来的河道流量发生，河流现在遵循更北的路线。因此，旧的路线目前缺乏流动和先锋物种开始殖民砾石。
3.斯佩河沿着冲积扇和岛屿上的自然植被是草地、部分植被覆盖的砾石坝和林地的镶嵌体，这种镶嵌体反映了河道和扇的形态和动态。物种多样性最高的是河流岛屿，其次是林地和草地。在该地区共记录和鉴定了129种植物。
4.近年来，有人提议改变费希河的位置，将其限制在一个更稳定的河道内。在进行这些河道工程的同时，还将在Feshie汇合处疏浚斯佩河。这些建议促使本文中提出的研究，结果表明，实施河流整治将导致网站的独特性和植被多样性的损失。版权所有© 2000约翰威利父子有限公司。
1. The River Feshie, a wandering gravel-bed river, has a prominent alluvial fan at its confluence with the River Spey forming a site of high conservation importance. The River Feshie is the best example of a relatively natural highly active gravel-bed river in the UK and the fan also contains one of the few remnants of Scotland's original floodplain forest cover.
2. Channel switching and changes in gravel-bar morphology are a characteristic feature of this river. In recent years the river occupied a central position within the alluvial fan, until a major shift in the position of the channel to the southern sector of the fan occurred in 1990. However, riparian owners restored the flow to the original channel. In 1996, following this study, the channel again shifted course. This time no restoration of flow to the original course of the channel occurred and the river now follows a more northerly course. The old course is thus currently devoid of flow and pioneer species are starting to colonize the gravels.
3. The natural vegetation on the alluvial fan and islands along the River Spey are a mosaic of grassland, partially vegetated gravel bars and woodland, the mosaic reflecting both channel and fan morphology and dynamics. Highest species diversity was on the riverine islands, followed by the woodland and grassland respectively. In total 129 plant species were recorded and identified within the area.
4. In recent years there have been proposals to alter the location of the River Feshie and confine it to a more stable channel. In association with these channel works, dredging of the River Spey at the Feshie confluence would also be undertaken. These proposals prompted the research presented within this paper, and the results illustrate that the implementation of river training would lead to a loss of the site's unique character and vegetation diversity. Copyright © 2000 John Wiley & Sons, Ltd.