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 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 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 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 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 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 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 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 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 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 Surveying Marbled Murrelets at Inland Forested Sites written by and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The marbled murrelet (Brachyramphus marmoratus), a seabird, nests in forested stands from southeast Alaska south to Santa Cruz, California. Because of this species' close association with old-growth forests, researchers and land managers need a method to assess murrelet distribution and use patterns throughout its range. This guide describes a standardized method for surveying marbled murrelets used by researchers in California and Oregon during 1988 and 1989. Transects can be used to assess activity patterns over large blocks of land, such as States or counties. Stationary counts using an intensive inventory method can be used to survey small acreages, such as individual timber sales. In addition to bird counts, vegetation and physical data should be collected at each census point. The guide includes a form that can be used to design studies and determine activity patterns and potential use.

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 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Fine scale Lidar based Habitat Suitability Mapping Methodology for the Marbled Murrelet Brachyramphus Marmoratus on Vancouver Island British Columbia written by Georgia Emily Clyde and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The marbled murrelet (Brachyramphus marmoratus) is a Threatened seabird with very particular nesting requirements. They choose to nest almost exclusively on mossy platforms, provided by large branches or deformities, in the upper canopies of coniferous old-growth trees located within 50 km of the ocean. Due primarily to a loss of this nesting habitat, populations in B.C. have seen significant decline over the past several decades. As such, reliable spatial habitat data are required to facilitate efficient management of the species and its remaining habitats. Current habitat mapping methodologies are limited by their qualitative assessment of habitat attributes and the large, stand-based spatial scale at which they classify and map habitat. This research aimed to address these limitations by utilizing light detection and ranging (lidar) technologies to develop an object-based habitat mapping methodology capable of quantitatively mapping habitat suitability at the scale of an individual tree on Northern Vancouver Island, British Columbia (B.C.). Using a balanced random forest (BRF) classification algorithm and in-field habitat suitability data derived from low-level aerial surveys (LLAS), a series of lidar-derived terrain and canopy descriptors were used to predict the habitat suitability (Rank 1: Very High Suitability - Rank 6: Nil Suitability) of lidar-derived individual tree objects. The classification model reported an overall classification accuracy of 71%, with Rank 1 - Rank 5 reporting individual class accuracies of 90%, 86%, 74%, 67%, and 98%, respectively. Evaluation of the object-based predictive habitat suitability maps provided evidence that this new methodology is capable of identifying and quantifying within-stand habitat variability at the scale of an individual tree. This improved quantification provides a superior level of habitat differentiation currently unattainable using existing habitat mapping methods. As the total amount of suitable nesting habitat in B.C. is expected to continue to decline, this improved quantification is a critical advancement for strategic managers, facilitating improved habitat and species management.

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 Northwest Forest Plan the first 15 years 1994 2008 written by and published by . This book was released on 2011 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Status and Trend of Nesting Habitat for the Marbled Murrelet Under the Northwest Forest Plan 1993 to 2017 written by Teresa J. Lorenz and published by . This book was released on 2021 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The objectives of the effectiveness monitoring plan for the marbled murrelet (Brachyramphus marmoratus) include mapping nesting habitat at the start of the Northwest Forest Plan (NWFP) and estimating changes in that habitat every 5 years. Using Maxent species distribution models, we modeled the amount and distribution of probable nesting habitat in the murrelet's range in the NWFP area in 1993, 1 year prior to the start of the NWFP, and 25 years later (2017). Within the higher probability nesting habitat, we then estimated the amount of contiguous habitat (core) versus the amount of habitat bounding core habitat(edge) and habitat scattered in small forest fragments (scatter). We considered this "core habitat" as the best habitat. Our models indicate that there were 1.51 million acre of higher probability nesting habitat over all lands in the murrelet's range in Washington, Oregon, and California 1 year prior to the start of the NWFP in 1993. Of this, 0.14 million acre were identified as core habitat, which we defined as intact patches of higher probability nesting habitat>5.56 acre in size. In core habitat, we expected nest predation to be relatively low and the microclimate most favorable for murrelets. Most (68 percent, or 1.04 million acre)higher probability nesting habitat in 1993 was on federally administered lands, with 0.97 million acre (66 percent) in reserved land use allocations. We estimated that non-federal lands contained 29 percent of all higher probability nesting habitat, but only 13 percent of all core habitat. Thus, the bulk of core habitat was on federal lands. We estimated a net loss of about 1.4 percent in higher probability nesting habitat across the NWFP area and 1.8 percent in core habitat from 1993 to 2017. Timber harvest and wildfire were the major causes of habitat loss on federal lands since the NWFP was implemented. Timber harvest was the primary cause of loss on state and other nonfederal lands, accounting for 99 percent of all attributable losses since 1993. The NWFP has been successful in conserving higher probability nesting habitat on federal lands across the NWFP area, but has been less successful in conserving core habitat. We anticipate that losses of habitat on federal lands will continue because of fires and timber harvest. As forests mature, some of these losses maybe exceeded by recovery of currently unsuitable habitat within reserves. However, climate change offers a very real threat, and thus many gains may not be realized as the climate in the NWFP area becomes warmer, drier, and less favorable for developing forest conditions necessary for nesting murrelets. In addition, because losses of nesting habitat continue on private lands, incentives are needed to curb losses to better meet conservation objectives."--Page iii

Download or read book Testing a Marbled Murrelet Predictability Model Using Low Level Aerial Assessment in the Zeballos Landscape Unit Vancouver Island written by David Sinclair Donald and published by . This book was released on 2005 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: