Download or read book Interpretation of Habitat Quality from Air Photos at Marbled Murrelet Nest Sites in Mussel Inlet on the British Columbia Central Coast written by and published by . This book was released on 2011 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study uses newer, larger-scale 2007 colour aerial photography to interpret habitat attributes and classify habitat quality of 14 Marbled Murrelet (Brachyramphus marmoratus) nest sites identified in 1992 (n = 2) and 1999 (n = 12) in Mussel Inlet on the Central Coast of British Columbia. Mussel Inlet is a fjordland environment atypical of other areas for which the air photo interpretation classification has been tested using nest sites (i.e., Haida Gwaii, Vancouver Island, and south coastal British Columbia).--Publisher's website.

Download or read book Interpretation of Habitat Quality from Air Photos at Marbled Murrelet Nest Sites in Mussel Inlet on the British Columbia Central Coast written by Frances M. Louise Waterhouse and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: We used newer, larger-scale 2007 colour air photos to interpret habitat attributes and classify habitat quality of 14 Marbled Murrelet (Brachyramphus marmoratus) nest sites identified in 1992 (n = 2) and 1999 (n = 12) in Mussel Inlet on the Central Coast of British Columbia. Mussel Inlet is a fjordland environment atypical of other areas for which the air photo interpretation classification has been tested using nest sites (i.e., Haida Gwaii, Vancouver Island, and south coastal British Columbia). Nesting habitat described by 3-ha plots centred on the nest site was characterized in Mussel Inlet as having complex canopies with large trees in mid to low meso slope positions, and as such is comparable to that reported elsewhere in British Columbia. However, comparisons of the nest plot habitat attributes to those at 27 random plots also suggested that interpretations of murrelet habitat selectivity for Mussel Inlet differed from other coastal areas due to differences in characteristics and availability of forest structures. Overall in Mussel Inlet, more nest plots were classed as lower quality (i.e., 50% Low and Very Low) on air photos compared to other British Columbian studies (i.e., ~14% Low and Very Low). Although selectivity testing based on air photo habitat class was inconclusive, particularly for the High and Very High quality habitats for which limited habitat was available (~1 % of the study area), a trend was indicated for higher proportional use of Moderate and Low habitats and lower proportional use of Very Low habitats. We discuss limitations of the samples used for this study and issues in interpretation, resolution, and scale in applying the air photo methods in topographically complex, fjordland landscapes such as Mussel Inlet. Given these limitations and issues, we recommend use of aerial survey methods to confirm occurrence of nest platforms.

Download or read book Using Airphotos to Interpret Marbled Murrelet Nesting Habitat in British Columbia written by Frances M. Louise Waterhouse and published by . This book was released on 2004 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Verification of a Marbled Murrelet Habitat Inventory on the British Columbian Central Coast written by David Sinclair Donald and published by . This book was released on 2010 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: To support Marbled Murrelet (Brachyramphus marmoratus) strategic planning initiatives in the Central Coast region of British Columbia, the Ministry of Environment had 1.5 million hectares of forest mapped for potential nesting habitat quality using a six-class (Nil to Very High) air photo interpretation classification system. This classification evaluates attributes, such as tree size and canopy complexity, that are indirectly associated with potential nesting platform occurrence, on 1:10 000/1:15 000 air photos. We verified the habitat classifications of the air photo inventory maps using helicopter lowlevel aerial surveys.

Download or read book Use of Airphotos to Identify Describe and Manage Forest Structure of Marbled Murrelet Nesting Habitat at a Coastal British Columbia Site written by Frances M. Louise Waterhouse and published by Nanaimo, BC : Vancouver Forest Region, [Research Section. This book was released on 2002 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Low level Aerial Surveys to Verify Air Photo Interpretation of Marbled Murrelet Nesting Habitat in Haida Gwaii written by and published by . This book was released on 2012 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Air photo interpretation (API) is widely used in British Columbia for assessing and mapping forest nesting habitat of the Marbled Murrelet (Brachyramphus marmoratus). For strategic land use planning in Haida Gwaii, the entire land base (approximately 1 million ha) has been mapped based on polygons assessed with API. The API method does not, however, detect microsite features in the forest canopy, especially the presence of mossy mats and other potential nest platforms, which are essential for murrelets to nest. This study was therefore undertaken to compare the API habitat quality classifications with those made by low-level helicopter surveys (aerial surveys), which focus on the canopy structure and the presence of potential nest platforms."--Document.

Download or read book Assessing Habitat Quality of Marbled Murrelet Nest Sites on the Queen Charlotte Islands Haida Gwaii by Algorithm Airphoto Interpretation and Aerial Survey Methods written by and published by . This book was released on 2007 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Low level Aerial Surveys to Verify Air Photo Interpretation of Marbled Murrelet Nesting Habitat in Haida Gwaii written by and published by . This book was released on 2012 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air photo interpretation (API) is widely used in British Columbia for assessing and mapping forest nesting habitat of the Marbled Murrelet (Brachyramphus marmoratus). For strategic land use planning in Haida Gwaii, the entire land base (approximately ÆÌ million ha) has been mapped based on polygons assessed with API. The API method does not, however, detect microsite features in the forest canopy, especially the presence of mossy mats and other potential nest platforms, which are essential for murrelets to nest. This study was therefore undertaken to compare the API habitat quality classifications with those made by low-level helicopter surveys (aerial surveys), which focus on the canopy structure and the presence of potential nest platforms.

Download or read book Ecology and Conservation of the Marbled Murrelet written by C. John Ralph and published by DIANE Publishing. This book was released on 1997-04 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was compiled & edited by the interagency Marbled Murrelet Conservation Assessment Core Team. The 37 chapters cover both original studies & literature reviews of many aspects of the species' biology, ecology, & conservation needs. It includes new information on the forest habitat used for nesting, marine distribution, & demographic analyses; & describes past & potential effects of humans on the species habitats. Future research needs & possible management strategies for both marine & forest habitats are suggested. Charts & tables.

Download or read book Ecology and Conservation of the Marbled Murrelet written by and published by . This book was released on 1995 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multi scale Analyses of Nest Site Selection and Fledging Success by Marbled Murrelets Brachyramphus Marmoratus in British Columbia written by Michael P. Silvergieter and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: I studied nesting habitat selection and fledging success by marbled murrelets, a seabird that nests in old-growth forests of high economic value, at two regions of southwestern British Columbia. At Clayoquot Sound, habitat occurs in larger stands, and murrelets selected steeper slopes and patches with more platform trees, and shorter trees, than at random sites. At Desolation Sound, where smaller forest stands predominate, patch scale variables were less important; increased canopy complexity in the patch, and wetter/cooler landscape aspects distinguished nests from random sites. In both regions, nests were often in "distinctive" trees, taller and with more potential platforms than others in the patch. Habitat features at multiple scales did not predict fledging success. Habitat quality as ranked by current remote methods (air photo interpretation, low-level aerial surveys) correlates with probability of use derived from stand-level habitat selection models, providing a quantitative assessment of their effectiveness as management tools.

Download or read book Surveys of Marbled Murrelet During the Breeding Season on the Central Coast of British Columbia 1991 written by L. Prestash and published by Delta, B.C. : Canadian Wildlife Service. This book was released on 1991 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Verification of a Marbled Murrelet Habitat Inventory in Three North Coast Landscape Units in Coastal British Columbia written by David Sinclair Donald and published by . This book was released on 2018 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Conservation Assessment for the Marbled Murrelet in Southeast Alaska written by Anthony R. DeGange and published by . This book was released on 1996 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Habitat Fragmentation on Marbled Murrelet Brachyramphus Marmoratus Habitat Quality in Southwestern British Columbia written by Joshua M. Malt and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: I investigated the effects of habitat fragmentation on habitat quality on the marbled murrelet (Brachyramphus marmoratus), a threatened seabird that nests on mossy side branches in old-growth forests. I compared relative predation risk and nest-site availability between forest interior sites and three edge types: "hard" (recent clearcuts), "soft" (regenerating forest), and natural (i.e. riparian areas). Higher artificial nest disturbance from avian predators at edges relative to interiors occurred at hard, but not soft edges, suggesting that predation risk initially increases, but then decreases with time. Differences in moss abundance at anthropogenic edges relative to natural-edged patches provided evidence that fragmentation will reduce the availability of marbled murrelet nest-sites. Landscape-scale surveys of murrelet nest predators suggested that populations of common ravens and Steller's jays will increase with habitat fragmentation. To mitigate impacts on murrelet breeding success, I recommend that harvesting patterns minimize the ratio of hard edge to interior old-growth habitat.

Download or read book Regional Population Monitoring of the Marbled Murrelet written by and published by . This book was released on 2007 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The marbled murrelet (Brachyramphus marmoratus) ranges from Alaska to California and is listed under the Endangered Species Act as a threatened species in Washington, Oregon, and California. Marbled murrelet recovery depends, in large part, on conservation and restoration of breeding habitat on federally managed lands. A major objective of the Northwest Forest Plan (the Plan) is to conserve and restore nesting habitat that will sustain a viable marbled murrelet population. Under the Plan, monitoring is an essential component and is designed to help managers understand the degree to which the Plan is meeting this objective. This report describes methods used to assess the status and trend of marbled murrelet populations under the Plan.

Download or read book Long term Risks to Marbled Murrelet Brachyramphus Marmoratus Populations written by J. D. Steventon and published by . This book was released on 2003 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report analyzes the conservation risk, or the confidence of success, associated with nesting habitat management strategies for the marbled murrelet in British Columbia. The framework for the analysis was a habitat-linked population viability analysis using an integrated package of models of marbled murrelet demography, habitat associations, habitat management, and environmental change to project relative population size & persistence probability at various forest management assumptions. The analysis focusses on changes in persistence probability as an unambiguous measure of risk, applied primarily at the scale of the marbled murrelet conservation regions proposed by the Canadian Marbled Murrelet Recovery Team. The report also assesses coast-wide risk using a bet hedging probability theory approach to combining regional risks. A key component of the analysis was the inclusion of uncertainty and how robust different management strategies might be in light of those uncertainties. Bayesian decision analysis was applied to determine the optimal choice of habitat amount to set aside. Appendices include details of the models used in the analysis.