کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
89248 | 159336 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Stream size influences stream temperature impacts and recovery rates after clearfell logging Stream size influences stream temperature impacts and recovery rates after clearfell logging](/preview/png/89248.png)
Water temperature has profound effects on stream ecosystems. We studied effects of clear-fell logging Pinus radiata plantations on mid-summer water temperatures and recovery times in streams with 2–12 m wide channels. Post-logging increases were 2–3.8 °C for summer daily means and 4–7.3 °C for summer daily maxima. Rates of recovery of thermal regimes after logging were strongly negatively correlated with stream size, as indexed by catchment area, channel width or baseflow (r2 = 0.80–0.93). Summer daily mean and maximum temperatures declined during the riparian vegetation regrowth phase by 0.18 and 0.47 °C year−1, respectively, for the largest stream and 1.4 and 1.9 °C year−1 in the smallest stream. Thermal regimes were restored in small streams (2–4 m wide channels) about 6–8 years after clearfelling. In medium-sized streams (6–12 m wide channels), we predict this recovery will take 12–16 years.
Journal: Forest Ecology and Management - Volume 256, Issue 12, 10 December 2008, Pages 2101–2109