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Synopsis: Recognizing that natural and human disturbances cause significant changes to landscape composition and ecosystem function, this report aims to identify and describe key indicators of environmental sustainability, categorized by vegetation, biodiversity, and watershed characteristics. Measurable indicators of environmental sustainability, including landscape indicators summarized in the vegetation indicators category, were distilled from a wide-ranging literature review. These indicators are intended to serve as metrics of environmental quality that assist land use planners in determining if management goals have been reached. As such, the report provides an overview, assessment, and recommended uses for...
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Conclusions: There was a significant reduction in ovenbird pairing success at compressor sites (77%) compared with noiseless wellpads (92%). These differences were apparent regardless of territory quality or individual male quality. Noise interferes with a male's song, such that females may not hear the male's song at greater distances and/or females may perceive males to be of lower quality because of distortion of song characteristics Thresholds/Learnings: Synopsis: Anthropogenic noise is rapidly increasing in wilderness areas as a result of industrial expansion. This study assessed pairing success and age distribution of male ovenbirds, Seiurus aurocapilla, in the boreal forest of Alberta, Canada, in areas around...
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Synopsis: Natural habitats are considered inherently indispensable to the global economy by conservationists, but few natural ecosystems afford direct and quantifiable economic benefits. Quantification of natural land value can provide compelling evidence favoring preservation over development. Wild bees are important pollinators of many crop plants, and natural patches in agroecosystems enhance pollinator services and crop yield. Bee abundance was greatest in canola fields that had more uncultivated land within 750 m of field edges and seed set was greater in fields with higher bee abundance. A cost–benefit model that estimates profit in canola agroecosystems with different proportions of uncultivated land is presented....
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Conclusions: Edge structure affects movement patterns in chickadee flocks. Flocks tend to move parallel to forest edges. Thresholds/Learnings: Synopsis: During a two-year study of chickadee flocks in a fragmented agricultural landscape near Edmonton, Alberta, researchers tested the degree to which flocks responded to forest boundaries based on changes in vegetation, foraging sites, and edge structure near these boundaries. The results indicate that sharp forest boundaries (edges) acted strongly as movement corridors for birds, encouraging flocks to move parallel (within 75 m) to forest edges.
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The study examined the effects of forest harvest practices that approximate natural disturbance processes to evaluate whether these practices help conserve biodiversity. Past research has shown that management practices that mimic natural disturbance events such as forest fires is a successful habitat conservation strategy, particularly for boreal forest bird communities. The study investigated how bird communities differed between postharvest and postfire stands in the mid-boreal region of Alberta. The research found that the most significant difference between postfire and postharvest landscapes is the amount and orientation of residual live and dead trees. Postfire stands consist largely of standing dead trees...
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Conclusions: Increasing seismic line density from 0 to 8 km/km2 resulted in a 38% decline and an 82% decline in bird abundance when individuals used lines as territory boundaries or avoided edges by 50 m, respectively. When tested with ovenbirds, male ovenbirds showed a distinct use of one side of the seismic line, suggesting lines acted as territory boundaries. Ovenbirds declined with seismic line density when a threshold seismic line density of 8.5 km/km2 was reached. Above the threshold, Ovenbirds declined 19% for each 1 km/km2 increase in seismic line density. Thresholds/Learnings: Synopsis: In the boreal plains of Alberta, Canada, energy sector exploration has resulted in extensive dissection of the landscape...


    map background search result map search result map Understanding avian responses to forest boundaries: a case study with chickadee winter flocks. Modeling and field-testing of Ovenbird (Seiurus aurocapillus) responses to boreal forest dissection by energy sector development at multiple spatial scales. Chronic industrial noise affects pairing success and age structure of ovenbirds Seiurus aurocapilla. Changes in bird communities in boreal mixedwood forest: harvest and wildfire effects over 30 years. Landscape, Biodiversity, and Indicator Review and Assessment Pollinators provide economic incentive to preserve natural land in agroecosystems Understanding avian responses to forest boundaries: a case study with chickadee winter flocks. Landscape, Biodiversity, and Indicator Review and Assessment Changes in bird communities in boreal mixedwood forest: harvest and wildfire effects over 30 years. Modeling and field-testing of Ovenbird (Seiurus aurocapillus) responses to boreal forest dissection by energy sector development at multiple spatial scales. Chronic industrial noise affects pairing success and age structure of ovenbirds Seiurus aurocapilla. Pollinators provide economic incentive to preserve natural land in agroecosystems