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Assessing terrestrial wildlife populations in the Toronto and Region Area of Concern
Journal of Great Lakes Research ( IF 2.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.jglr.2020.07.019
Lyndsay A. Cartwright , Sue Hayes , Douglas C. Tozer , Dan Clayton , Mary-Ann Burns , Dena Lewis , Noah Gaetz , Namrata Shrestha

Abstract Beneficial use impairments (BUIs) under the Great Lakes Water Quality Agreement identify environmental issues requiring remedial action within the Great Lakes Areas of Concern (AOCs). We conducted this study to support the assessment of the wildlife component of BUI 3: degradation of fish and wildlife populations. We compared bird and amphibian (frogs and toads) data from the Toronto and Region Conservation Authority’s Terrestrial Long-term Monitoring Program in the Toronto and Region AOC to an adjacent, but otherwise similar, reference watershed, Duffins Creek. Twelve of 13 targets were met within the AOC for forest bird, wetland bird, meadow bird and amphibian populations based on averages of mean annual values at sites within the AOC that were within two standard deviations of averages at sites in the Duffins Creek reference watershed between 2008 and 2017. Even though wildlife populations within the AOC were within the normal range of variability expected from a reference watershed, they were often at lower levels than within the Duffins Creek reference watershed. In addition, forest bird and amphibian populations were negatively affected by urbanization within the AOC and meadow bird indices declined. We conclude that while wildlife populations within the AOC currently meet targets for BUI 3, they continue to be negatively impacted by numerous stressors that are primarily related to past and ongoing urbanization. Thus, continued restoration of wildlife habitat and protection of existing habitat within the AOC is highly recommended.

中文翻译:

评估多伦多和关注区域的陆地野生动物种群

摘要 大湖区水质协议下的有益使用损害 (BUI) 确定了大湖区关注区 (AOC) 内需要采取补救措施的环境问题。我们进行这项研究是为了支持对 BUI 3 的野生动物部分的评估:鱼类和野生动物种群的退化。我们将多伦多和地区保护局在多伦多和地区 AOC 的陆地长期监测计划中的鸟类和两栖动物(青蛙和蟾蜍)数据与相邻但在其他方面相似的参考流域达芬斯溪进行了比较。森林鸟类、湿地鸟类、草甸鸟类和两栖动物种群基于 AOC 内各站点的年均值平均值,这些值与 2008 年至 2017 年达芬斯溪参考流域站点的平均值相差在两个标准偏差之内。 即使 AOC 内的野生动物种群在正常范围内参考流域的预期变异性,但它们的水平通常低于达芬斯溪参考流域内的水平。此外,森林鸟类和两栖动物种群受到 AOC 内城市化的负面影响,草地鸟类指数下降。我们得出的结论是,虽然 AOC 内的野生动物种群目前达到了 BUI 3 的目标,但它们继续受到主要与过去和正在进行的城市化相关的众多压力因素的负面影响。因此,
更新日期:2020-08-01
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