The influence of riparian woodland on stream temperatures: implications for the performance of juvenile salmonids
The influence of riparian woodland on stream temperatures: implications for the performance of juvenile salmonids
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DOI：
10.1002/hyp.6996
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发表时间：
2008-03-30
影响因子：
3.2
通讯作者：
Tetzlaff, D.
中科院分区：
文献类型：
--
作者：
Malcolm, I. A.;Soulsby, C.;Tetzlaff, D.
在苏格兰东北部阿伯丁郡迪河的一个31公里（2）的支流集水区格诺克本河的五个干流位置和一个支流位置监测了河流温度。2003年4月至2006年3月，流温度记录在15分钟的分辨率，调查的影响，半自然的河岸林地流温度的空间和时间的变化和影响，这对少年大西洋鲑鱼（萨尔莫salar）的性能。两个上游站点位于开放的高沼地的位置，而三个下游站点位于混合落叶/针叶林地区的区域，在连续河岸树木覆盖的上游边缘的渐进距离为0.75，1.5和2.0公里。河岸林地对溪流温度的影响全年变化，春季增加到夏季最大，秋季再次下降。最高，平均和昼夜温度幅度较低，最低温度较高，林地相比，那些位于开放的高沼地。尽管在不同地点之间检测到鱼类表现存在显着差异，但由于混杂因素，温度变化的影响尚不清楚，其中一些因素在研究期间无法测量。建议今后的研究应结合联合收割机的进展，在现场为基础的温度监测与水文气候学开发现实的过程为基础的模型，可用于流温度预测。需要进一步的进展，了解自然可变的热制度和鱼的性能之间的关系，以便生态预测可以有效地从现场和模拟温度数据。(C)版权所有2008年。经英国政府文书局许可复制。由John Wiley & Sons有限公司出版
Stream temperature was monitored at five mainstem locations and one tributary location on the Girnock Burn, a 31-km(2) tributary catchment of the Aberdeenshire Dee in north-east Scotland. Stream temperature was recorded at 15-min resolution between April 2003 and March 2006 to investigate the influence of semi-natural riparian woodland on the spatial and temporal variability of stream temperature and the influence that this had on the performance of juvenile Atlantic salmon (Salmo salar). Two upstream sites were located in open moorland locations, while three downstream sites were located in areas of mixed deciduous/coniferous woodland areas at progressive distances of 0.75, 1.5 and 2.0 kin from the upstream edge of continuous riparian tree cover. The effects of riparian woodland on stream temperature varied through the year, increasing during the spring to a maximum in summer, before decreasing once again in autumn. Maximum, mean and diel temperature amplitude were lower and minimum temperatures higher at woodland sites when compared to those located in open moorland. Although significant differences in fish performance were detected between sites, the influence of temperature variability was unclear due to confounding factors, some of which could not be measured during the study. It is recommended that future studies should combine advances in field-based temperature monitoring with those in hydroclimatology to develop realistic process-based models that can be used for stream temperature prediction. Further advances are needed in understanding the relationship between naturally variable thermal regime and fish performance in order that ecological predictions can be usefully made from field and modelled temperature data. (C) Crown Copyright 2008. Reproduced with the permission of Her Majesty's Stationery Office. Published by John Wiley & Sons, Ltd.