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Summer Range Occupancy Modeling Of Non Native Mountain Goats In The Greater Yellowstone Area
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Book Synopsis Summer Range Occupancy Modeling of Non-native Mountain Goats in the Greater Yellowstone Area \ by : Jesse Daniel DeVoe
Download or read book Summer Range Occupancy Modeling of Non-native Mountain Goats in the Greater Yellowstone Area \ written by Jesse Daniel DeVoe and published by . This book was released on 2015 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-native species can have adverse impacts on native species. Predicting the potential extent of distributional expansion and abundance of an invading non-native species can inform appropriate conservation and management actions. Non-native mountain goats (Oreamnos americanus) in the greater Yellowstone area (GYA) have substantial potential to occupy similar habitats to native Rocky Mountain bighorn sheep (Ovis canadensis canadensis). To understand the potential for expansion of mountain goats in the GYA, this study evaluated detection-nondetection data derived from ground-based occupancy surveys of viewsheds partitioned into a grid of 100 ? 100 m sampling units. Surveys were conducted over three summer seasons (2011?2013) in two study areas with well-established mountain goat populations. Relationships between scale-specific habitat covariates and mountain goat selection were evaluated to model occupancy and detection probabilities based on mountain goat detections in 505 of the 53,098 sampling units surveyed. Habitat selection was most strongly associated with terrain covariates, including mean slope and slope variance, at a spatial scale of 500 ? 500 m, and canopy cover, heat load, and normalized difference vegetation index at a spatial scale of 100 ? 100 m. These results provide new insight into multi-scale patterns of mountain goat habitat selection, as well as evidence that mean slope and slope variance are more informative terrain covariates than distance to escape terrain, which has been commonly used in published mountain goat habitat models. The model predicted 9,035 km2 of suitable habitat within the GYA, of which 57% is currently un-colonized. Seventy-five percent of all bighorn observations recorded in the GYA fall within predicted suitable mountain goat habitat. We also estimated that the GYA might have the potential to support 5,331?8,854 mountain goats when all predicted habitat is occupied, or approximately 2.5?4.2 times the most recent abundance estimate of 2,354.
Book Synopsis Occupancy Modeling of Non-native Mountain Goats in the Greater Yellowstone Area by : Jesse Daniel DeVoe
Download or read book Occupancy Modeling of Non-native Mountain Goats in the Greater Yellowstone Area written by Jesse Daniel DeVoe and published by . This book was released on 2015 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-native species can have adverse impacts on native species; however, coexistence may be possible if their ecological niches minimally overlap. Fine spatial scale information is needed to understand these niches but can be challenging to obtain for rare, imperfectly detected species inhabiting difficult to survey landscapes. Non-native mountain goats (Oreamnos americanus) in the greater Yellowstone area (GYA) are such a species and have substantial potential to expand in distribution and occupy similar habitats to native Rocky Mountain bighorn sheep (Ovis canadensis canadensis). To understand the niche and potential for expansion of mountain goats in the GYA, this study used a unique, fine spatial scale method to collect detection-nondetection data from two study areas with established mountain goat populations over three summer seasons (2011-2013). Relationships between scale-specific habitat covariates and mountain goat selection were evaluated using a single-species, single-season occupancy analysis to model occupancy and detection probabilities based on 505 mountain goat detections from 53,098 surveyed sampling units. Habitat selection was most strongly associated with terrain covariates, including mean slope and slope variance, at a spatial scale of 500 x 500 m, and canopy cover, heat load, and normalized difference vegetation index at a spatial scale of 100 x 100 m. These results provide new insight into multi-scale patterns of mountain goat habitat selection, as well as evidence that mean slope and slope variance are superior terrain covariates to distance to escape terrain that has dominated published mountain goat habitat models. The model predicted 10,745 km 2 of suitable habitat within the GYA, of which 57% is currently un-colonized. Throughout the GYA, suitable habitat appears to generally overlap extensively with areas occupied by bighorn sheep. I also estimated the GYA may have the potential to support 5,372-8,918 mountain goats when all predicted habitat is occupied, or approximately 2.5-4.2 times the most recent abundance estimate of 2,104.
Book Synopsis Range Expansion and Population Growth of Non-native Mountain Goats in the Greater Yellowstone Area by : Elizabeth P. Flesch
Download or read book Range Expansion and Population Growth of Non-native Mountain Goats in the Greater Yellowstone Area written by Elizabeth P. Flesch and published by . This book was released on 2016 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population growth and range expansion of nonnative species can potentially disrupt ecosystem function or add conservation value to an area, and evaluation of possible impacts can be a challenge for managers. Nonnative populations of mountain goats (Oreamnos americanus) are present in the Greater Yellowstone Area (GYA) in the U.S. states of Idaho, Montana, and Wyoming because of historical introduction events, but their population trend and range have not been assessed across the area. We used 6,701 location records from 1947 to 2015 to map mountain goat distribution and evaluate, in a descriptive manner, range overlap with native bighorn sheep (Ovis canadensis). We analyzed 136 survey counts using the Exponential Growth State?Space model to estimate population trends and abundance. Mountain goats dispersed 50?85 km from introduction sites to occupy all mountain ranges in the northern GYA and 30?40 km to occupy new areas in the southern GYA. Mountain goat numbers increased in nearly all count units, with the strongest growth rates estimated in areas more recently colonized. Using moderate detection probability (0.70), we estimated approximately 2,355 mountain goats in the GYA. Although not tested in our analysis, the gradual range expansion and population growth rates were consistent with density-dependent processes observed in other introduced large herbivores and demonstrate that mountain goats can successfully disperse over unsuitable locales to colonize new areas. Therefore, we expect mountain goat populations will continue to expand into unoccupied mountain ranges that contain significant numbers of bighorn sheep unless specific management actions are implemented to address their population growth.
Book Synopsis Advances in Ungulate Ecology by : R. Terry Bowyer
Download or read book Advances in Ungulate Ecology written by R. Terry Bowyer and published by Frontiers Media SA. This book was released on 2021-06-28 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Occupancy Surveys for Mountain Ungulates by : Megan O'Reilly
Download or read book Development of Occupancy Surveys for Mountain Ungulates written by Megan O'Reilly and published by . This book was released on 2013 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bighorn sheep (Ovis canadensis canadensis) and mountain goats (Oreamnos americanus) overlap in broad food and habitat requirements. In places where mountain goats are non-native there are concerns over potential competition between the two species. The southern Gallatin Mountain range, within and adjacent to the northwest boundary of Yellowstone National Park has both native bighorn sheep and non-native mountain goats. Existing observations of both species for this area vary in spatial precision and there are no records of where observers looked for animals but did not detect them. To gain a better understanding of the relationship between bighorn sheep and mountain goats and their habitat, it is necessary to understand resource selection and the extent of overlap in resource use at fine spatial and temporal scales. I used logistic regression to relate existing presence-only bighorn sheep and mountain goat data for this area to landscape features I expected would be important to both species. Using resulting coefficient estimates, I constructed a relative habitat suitability map and used it to define four survey regions within the study area. The crew of four spent 113 observer days afield and hiked 210 miles recording occupancy data for both mountain ungulates within these four survey regions. Observers surveyed 6,603 100 x 100 meter grid cells, with 15 groups of bighorn sheep and 34 groups of mountain goats observed during surveys. Because there were more mountain goat observations available, I used only mountain goat data to conduct formal occupancy analyses. Mountain goat occupancy was positively associated with ruggedness at the 100 meter scale and there was an important interaction between distance to escape terrain and tree cover at the 500 meter scale. As the distance to escape terrain increased mountain goats were less likely to occupy treed areas. The ruggedness index used in my presence-only modeling effort was based on the rate of change in slope. By using a ruggedness index which included changes in slope and aspect I improved model performance. This research demonstrates the feasibility of conducting occupancy surveys in mountainous terrain and provides interesting biological insights regarding mountain goats and their habitat.
Book Synopsis Origin, Expansion, and Status of Mountain Goats in Yellowstone National Park by : Thomas O. Lemke
Download or read book Origin, Expansion, and Status of Mountain Goats in Yellowstone National Park written by Thomas O. Lemke and published by . This book was released on 2004 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 1980s scientists determined that an introduced mountain goat (Oreamnos americanus) population caused negative impacts to subalpine plant communities in Olympic National Park (ONP). These findings resulted in a controversial and costly mountain goat reduction program from 1981?1989. Since 1990 introduced nonnative mountain goats from Montana have successfully colonized Yellowstone National Park (YNP) via the Absaroka and Gallatin mountain ranges. Using systematic aerial surveys from 1997?2001, I documented a breeding goat population inside or within 1 km of YNP that increased from 24 to 96 mountain goats observed (mean observed rate of increase r̄= 0.35). Because of increasing goat populations immediately adjacent to YNP, Montana Fish, Wildlife, and Parks (MFWP) established 2 new hunting districts and 44 mountain goats were harvested near YNP from 1996?2001. The mountain goat is a socially popular ?charismatic? species with high watchable-wildlife values. However, within YNP they also are viewed with concern as an exotic species, potentially capable of exploiting fragile subalpine landscapes where, by policy, nonnative ungulates are not welcomed. Based on habitat availability and goat densities to the north, YNP potentially may support 200?300 mountain goats. Important ecological differences between YNP and ONP may reduce the likelihood of negative resource impacts of mountain goats in YNP. However, the speed at which mountain goat numbers and distribution are increasing warrants further habitat and population monitoring to better understand and predict the ecological effects of this new species. Future mountain goat management decisions in YNP should be based on documented impacts of goats on their habitat and other species in YNP and not what has occurred in ONP. Mountain goat management efforts in YNP should acknowledge MFWP's management objective of maintaining viable goat populations in suitable habitats and recognize that goats from Montana will continue to be a source population for future dispersal into and colonization of YNP.
Book Synopsis The Status, Distribution, and Management of Mountain Goats in the Greater Yellowstone Ecosystem by : John W. Laundré
Download or read book The Status, Distribution, and Management of Mountain Goats in the Greater Yellowstone Ecosystem written by John W. Laundré and published by . This book was released on 1990 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparing Citizen Science and Professional Data to Evaluate Extrapolated Mountain Goat Distribution Models by : Elizabeth P. Flesch
Download or read book Comparing Citizen Science and Professional Data to Evaluate Extrapolated Mountain Goat Distribution Models written by Elizabeth P. Flesch and published by . This book was released on 2017 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Citizen science provides a prime opportunity for wildlife managers to obtain low-cost data recorded by volunteers to evaluate species distribution models and address research objectives. Using mountain goat (Oreamnos americanus) location data collected through aerial surveys by professionals, ground surveys by professionals, and ground surveys by volunteers, we evaluated two mountain goat distribution models extrapolated across Waterton-Glacier International Peace Park. In addition, we compared mountain goat location data by observer and survey type to determine whether there were differences that affected extrapolated model evaluation. We found that all dataset types compared similarly to both mountain goat models. A mountain goat occupancy model developed in the Greater Yellowstone Area (GYA) was the most informative in describing mountain goat locations. We compared Spearman-rank correlations (rs) for occupancy probability bin ranks in the GYA model extrapolation and area-adjusted frequencies of mountain goat locations, and we found that all datasets had a positive correlation, indicating the model had useful predictive ability. Aerial observations had a slightly greater Spearman-rank correlation (rs = 0.964), followed by the professional ground surveys (rs = 0.946), and volunteer ground datasets (rs = 0.898). These results suggest that with effective protocol development and volunteer training, biologists can use mountain goat location data collected by volunteers to evaluate extrapolated models. We recommend that future efforts should apply this approach to other wildlife species and explore development of wildlife distribution models using citizen science.
Book Synopsis The Normalized Difference Vegetation Index by : Nathalie Pettorelli
Download or read book The Normalized Difference Vegetation Index written by Nathalie Pettorelli and published by Oxford University Press, USA. This book was released on 2013-10 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a coherent review of NDVI including its origin, its availability, its associated advantages and disadvantages, and its possible applications in ecology, environmental monitoring, wildlife management, and conservation.
Download or read book Areas of Montana: 1960 written by and published by . This book was released on 1964 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safe Passages written by Jon P. Beckmann and published by Island Press. This book was released on 2012-04-20 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safe Passages brings together in a single volume the latest information on the emerging science of road ecology as it relates to mitigating interactions between roads and wildlife. This practical handbook of tools and examples is designed to assist individuals and organizations thinking about or working toward reducing road-wildlife impacts. The book provides: an overview of the importance of habitat connectivity with regard to roads current planning approaches and technologies for mitigating the impacts of highways on both terrestrial and aquatic species different facets of public participation in highway-wildlife connectivity mitigation projects case studies from partnerships across North America that highlight successful on-the-ground implementation of ecological and engineering solutions recent innovative highway-wildlife mitigation developments Detailed case studies span a range of scales, from site-specific wildlife crossing structures, to statewide planning for habitat connectivity, to national legislation. Contributors explore the cooperative efforts that are emerging as a result of diverse organizations—including transportation agencies, land and wildlife management agencies, and nongovernmental organizations—finding common ground to tackle important road ecology issues and problems. Safe Passages is an important new resource for local-, state-, and national-level managers and policymakers working on road-wildlife issues, and will appeal to a broad audience including scientists, agency personnel, planners, land managers, transportation consultants, students, conservation organizations, policymakers, and citizens engaged in road-wildlife mitigation projects.
Download or read book Wildland Fire in Ecosystems written by and published by . This book was released on 1998 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Linkages in the Landscape by : Andrew F. Bennett
Download or read book Linkages in the Landscape written by Andrew F. Bennett and published by IUCN. This book was released on 2003 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: The loss and fragmentation of natural habitats is one of the major issues in wildlife management and conservation. Habitat "corridors" are sometimes proposed as an important element within a conservation strategy. Examples are given of corridors both as pathways and as habitats in their own right. Includes detailed reviews of principles relevant to the design and management of corridors, their place in regional approaches to conservation planning, and recommendations for research and management.
Book Synopsis Greater Yellowstone's Mountain Ungulates by : Robert A. Garrott
Download or read book Greater Yellowstone's Mountain Ungulates written by Robert A. Garrott and published by . This book was released on 2021-06 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes information on bighorn sheep and mountain goats in the Greater Yellowstone Area.
Book Synopsis Wildlife Habitats in Managed Forests by : Jack Ward Thomas
Download or read book Wildlife Habitats in Managed Forests written by Jack Ward Thomas and published by . This book was released on 1979 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: That is what this book is about. It is a framework for planning, in which habitat is the key to managing wildlife and making forest managers accountable for their actions. This book is based on the collective knowledge of one group of resource professionals and their understanding about how wildlife relate to forest habitats. And it provides a longoverdue system for considering the impacts of changes in forest structure on all resident wildlife.
Book Synopsis Carnivore Ecology and Conservation by : Luigi Boitani
Download or read book Carnivore Ecology and Conservation written by Luigi Boitani and published by Oxford University Press. This book was released on 2012-01-12 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides concise, yet authoritative descriptions of the most common techniques used to study wild carnivores and to conserve and manage their populations within increasingly human-dominated landscapes.
Book Synopsis Analysis of Wildlife Radio-Tracking Data by : Gary C. White
Download or read book Analysis of Wildlife Radio-Tracking Data written by Gary C. White and published by Elsevier. This book was released on 2012-12-02 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the substantial advances in the miniaturization of electronic components, wildlife biologists now routinely monitor the movements of free-ranging animals with radio-tracking devices. This book explicates the many analytical techniques and computer programs available to extract biological information from the radio tracking data. Presentation of software programs for solving specific problems Design of radio-tracking studies Mechanics of data collection Estimation of position by triangulation Graphic presentation of animal migration, dispersal, fidelity, and association Home range estimation, habitat utilization, and estimation of survival rates and population size
