Global S&T Development Trend Analysis Platform of Resources and Environment
Melting Glaciers Will Challenge Some Salmon Populations and Benefit Others | |
admin | |
2020-03-11 | |
发布年 | 2020 |
语种 | 英语 |
国家 | 美国 |
领域 | 气候变化 |
正文(英文) | A new Simon Fraser University-led study looking at the effects that glacier retreat will have on western North American Pacific salmon predicts that while some salmon populations may struggle, others may benefit. The research, published today in the journal BioScience, examined the multiple ways in which salmon might be affected by climate-change driven glacier retreat over the coming decades. The researchers predict that in southern watersheds the loss of cold glacier meltwater during summer months could lead to low water flows and warmer water temperatures, both challenges for adult and young salmon. However, in more northern watersheds, glacier retreat may create new salmon habitat. Eighty-five per cent of major salmon watersheds or regions in western North America currently have at least some glacier coverage. Glaciers in this region are expected to lose up to eighty per cent of their ice volume by the year 2100, with significant implications for salmon habitat availability, water flows, and water temperatures. SFU PhD candidate Kara Pitman, the study's lead author, says, "In regions where the landscape is still dominated by glaciers, such as in south-central Alaska, massive glaciers are currently peeling back from low-lying valleys, creating new rivers and lakes that young salmon can use as they develop," Pitman says. "Salmon evolved over millennia in rivers that were dynamic and ever-changing," she says. "If given enough time, salmon are well-adapted to cope with the landscape changes associated with glacier retreat." Unfortunately, dwindling glacier ice is just one of many sources of rapid change in salmon ecosystems. The authors caution that glacier retreat is adding one more pressure on salmon systems that are already stressed by climate change, habitat destruction, and hatchery practices that erode salmon biodiversity. SFU professor and co-author Jonathan Moore says this study highlights the need for forward-looking perspectives on salmon conservation and management. "In this era of rapid global change, there is an urgent need to protect and manage for the future of salmon and their ecosystems, not just the present," Moore says.
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Story Source: Materials provided by Simon Fraser University. Note: Content may be edited for style and length. Journal Reference:
Cite This Page: Simon Fraser University. "Melting glaciers will challenge some salmon populations and benefit others." ScienceDaily. ScienceDaily, 11 March 2020.
Simon Fraser University. (2020, March 11). Melting glaciers will challenge some salmon populations and benefit others. ScienceDaily. Retrieved March 19, 2020 from www.sciencedaily.com/releases/2020/03/200311161904.htm
Simon Fraser University. "Melting glaciers will challenge some salmon populations and benefit others." ScienceDaily. www.sciencedaily.com/releases/2020/03/200311161904.htm (accessed March 19, 2020).
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URL | 查看原文 |
来源平台 | Science Daily |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/229109 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | admin. Melting Glaciers Will Challenge Some Salmon Populations and Benefit Others. 2020. |
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