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| Schindler, David; University of Alberta; d.schindler@ualberta.ca. |
| Few boreal waters are managed in a sustainable manner, because cumulative effects of a variety of human activities are not considered. Fisheries and water quality have declined in most large water bodies of the southern boreal zone. Some of the reasons are direct, including overexploitation of fisheries, alteration of flow patterns, introductions of non-native species, and discharge of eutrophying nutrients and persistent contaminants. However, improper management of watersheds and airsheds also causes degradation of aquatic ecosystems. Clear-cut logging, climatic warming, acid precipitation, and stratospheric ozone depletion are among the more important of these indirect stressors. There are important interactions among these stressors, requiring that... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Atmospheric stressors; Aquatic ecosystems; Biodiversity of streams and lakes; Boreal ecosystems; Clear-cutting; Cumulative effects; Ecological invasions; Fisheries; Indigenous peoples; Land-water interactions; Sustainable development; Watershed management.. |
| Ano: 1998 |
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| Gunn, Anne; ; gunnan@telus.net; Russell, Don; ; don.russell@ec.gc.ca; Greig, Lorne; ESSA Technologies Ltd.; lgreig@essa.com. |
| Globally, many migratory mammals are facing threats. In northern Canada, large annual ranges expose migratory caribou to an array of human activities, including industrial exploration and development. Recognition that responses to human activities can accumulate for caribou is long-standing, but is heightened by recent declines in caribou abundance. For example, since the mid-1990s, the Bathurst herd has declined by approximately 90%, leading to severe harvest restrictions. More mines are being proposed and developed across the herd’s annual range, raising questions about cumulative effects. Despite progress on assessment techniques, aboriginal groups are expressing strong concerns and frustration about gaps in responsibilities for who should... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Adaptive management; Arctic Canada; Cumulative effects; Migratory caribou; Mitigation; Monitoring. |
| Ano: 2014 |
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| Cooper, Caren B; Cornell Lab of Ornithology; cbc25@cornell.edu; Dickinson, Janis; Cornell Lab of Ornithology;; Phillips, Tina; Cornell Lab of Ornithology;; Bonney, Rick; Cornell Lab of Ornithology;. |
| Human activities, such as mining, forestry, and agriculture, strongly influence processes in natural systems. Because conservation has focused on managing and protecting wildlands, research has focused on understanding the indirect influence of these human activities on wildlands. Although a conservation focus on wildlands is critically important, the concept of residential area as an ecosystem is relatively new, and little is known about the potential of such areas to contribute to the conservation of biodiversity. As urban sprawl increases, it becomes urgent to construct a method to research and improve the impacts of management strategies for residential landscapes. If the cumulative activities of individual property owners could help conserve... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Citizen science; Cumulative effects; Residential landscapes; Urban ecology. |
| Ano: 2007 |
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