Browsing by Author "Handwerk, Jill, author"
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Item Open Access 2nd annual Colorado rare plant symposium: G1 plants of Colorado: meeting minutes(Colorado State University. Libraries, 2005) Anderson, David G., author; Handwerk, Jill, author; Winther, Carol, author; Grant, Tom, author; Colorado Natural Heritage Program, publisherIncludes minutes from the second Annual Colorado Rare Plant Symposium covering a review G1 plants of Colorado.Item Open Access Climate change vulnerability assessment for rare plants of the San Juan Region of Colorado(Colorado State University. Libraries, 2014-05) Grunau, Lee, author; Rondeau, Renée Jane, author; Kuhn, Bernadette, author; Handwerk, Jill, author; Colorado Natural Heritage Program, publisherThe 5 million-acre San Juan Region lies in southwest Colorado and is considered part of the Four Corners area. The Colorado Natural Heritage Program tracks 122 plant species within this region. Recently published climate models for the Southern San Juan Region project a median decrease in May precipitation across southwestern Colorado and a 4.3° F increase in average annual temperatures, suggesting drought may become problematic for these species in the future (Lukas et al. 2014). As of 2014, we have conducted Climate Change Vulnerability Assessments using methodology developed by NatureServe for 60 of the tracked plant species known from the region, primarily focused on federally listed or agency sensitive species. Our results indicate that nearly 60% (36 species) of these plant species are extremely vulnerable to climate change. The most vulnerable species were from alpine, cliff and canyon, barrens, and groundwater dependent wetland habitats. Spruce-fir and ponderosa pine forests, and montane grasslands had the least amount of vulnerable species. Of the 60 species assesed, 37% (22 species) are endemic to the Four Corners region and most (19 species) are extremely vulnerable. Barrens support the highest number of endemic species of any habitat (7), and all but one barrens species is extremely vulnerable. We recommend developing climate adaptation strategies for extremely and highly vulnerable species and as time permits, assessing additional rare species.Item Open Access Colorado Natural Heritage Program: UAS surveys for Penstemon debilis(Colorado State University. Libraries, 2021-09-10) Handwerk, Jill, author; Swayze, Neal, author; Smith, Jessica, author; Colorado Natural Heritage Program, publisherItem Open Access Colorado wildlife action plan: appendix A: rare plants(Colorado State University. Libraries, 2015) Handwerk, Jill, author; Grunau, Lee, author; Spackman-Panjabi, Susan, author; Colorado Natural Heritage Program, publisherItem Open Access Guide to the ecological systems of Colorado(Colorado State University. Libraries, 2020) Anderson, Dave, author; Doyle, Georgia, author; Handwerk, Jill, author; Huggins, Janice, author; Kettler, Steve, author; Lyon, Peggy, author; Neid, Stephanie, author; Smith, Pam, author; Spackman-Panjabi, Susan, author; Colorado Natural Heritage Program, publisherItem Open Access Iterative distribution modeling for two endemic plants of the northern Piceance basin(Colorado State University. Libraries, 2013-04) Smith, Gabrielle, author; Handwerk, Jill, author; Fink, Michelle, author; Decker, Karin, author; Colorado Natural Heritage Program, publisherSpecies distribution modeling is one of many tools available to assist managers in understanding the potential distribution of rare and endemic species when regulating and prioritizing different land-use scenarios. Developing a predictive model of the distribution of a particular species can involve several different techniques, and be reported under a variety of names. All such models, however, are based on the ecological principle that the presence of a species on the landscape is controlled by a variety of biotic and abiotic factors, in the context of biogeographic and evolutionary history. Because we rarely, if ever, have complete and accurate knowledge of these factors and history, we can only seek to predict or discover suitable habitat by using characteristics of known occurrences of the taxon in question. The modeling process is further constrained by our inability to measure habitat characteristics accurately on a continuous spatial scale. As a result, modeling factors are usually an approximation of the environmental factors that control species distribution, using available data that is probably only a surrogate for the actual controlling factors. In the context of our study, species distribution modeling is a process that uses a sample of a real distribution (known locations or element occurrences) to build a model (estimate) of suitable environmental conditions (and, by implication, unsuitable conditions), and map that model across a study area. In this study we used an iterative modeling approach to investigate the potential distribution of two rare species: Physaria (Lesquerella) congesta and Physaria obcordata.Item Open Access Modeling the potential distribution of Phacelia scopulina var. submutica (Debeque phacelia) and Astragalus debequaeus (Debeque milkvetch) in western Colorado(Colorado State University. Libraries, 2005-12) Decker, Karin, author; Lavender, Amy, author; Handwerk, Jill, author; Anderson, David G., author; Colorado Natural Heritage Program, publisherItem Open Access Modeling the potential distribution of three endemic plants of the northern Piceance and Unita basins(Colorado State University. Libraries, 2006-06) Decker, Karin, author; Lavender, Amy, author; Handwerk, Jill, author; Anderson, David G., author; Colorado Natural Heritage Program, publisherItem Open Access Rare plant distribution models: CODEX display & call for expert review(Colorado State University. Libraries, 2022-09-16) Smith, Jessica, author; Fink, Michelle, author; Decker, Karin, author; Handwerk, Jill, author; Panjabi, Susan, author; Doyle, Georgia, author; Colorado Natural Heritage Program, publisherItem Open Access Rare plant surveys on the Pinon Canyon Maneuver Site, 2006-2007(Colorado State University. Libraries, 2007) Neid, Stephanie L., author; Decker, Karin, author; Handwerk, Jill, author; Panjabi, Susan Spackman, author; Colorado Natural Heritage Program, publisherItem Open Access Species distribution modeling of Colorado plants of greatest conservation need(Colorado State University. Libraries, 2021-09-10) Smith, Jessica, author; Decker, Karin, author; Handwerk, Jill, author; Doyle, Georgia, author; Colorado Natural Heritage Program, publisherItem Open Access Staunton State Park biological inventory(Colorado State University. Libraries, 1999-12) Panjabi, Susan Spackman, author; Anderson, David, author; Siemers, Jeremy, author; Pineda, Phyllis, author; Handwerk, Jill, author; Colorado Natural Heritage Program, publisherItem Open Access Survey and assessment of critical urban wetlands: City of Aurora(Colorado State University. Libraries, 2020-12) Gilligan, Laurie, author; Doyle, Georgia, author; Smith, Gabrielle, author; Lemly, Joanna, author; Lambert, Brad, author; Handwerk, Jill, author; Colorado Natural Heritage Program, publisherItem Open Access Survey of critical biological resources, Chaffee County, Colorado(Colorado State University. Libraries, 2009-05) Culver, Denise R., author; Malone, Delia, author; Neid, Stephanie L., author; Handwerk, Jill, author; Colorado Natural Heritage Program, publisherItem Open Access The State of Colorado's biodiversity 2011(Colorado State University. Libraries, 2011) Pague, Chris, author; Grunau, Lee, author; Siemers, Jeremy, author; Handwerk, Jill, author; Decker, Karin, author; Rondeau, Renée Jane, author; Colorado Natural Heritage Program, publisherIn order to assist the Colorado office of The Nature Conservancy with their Measures of Success program, and to provide biodiversity status information to other organizations in Colorado, the Colorado Natural Heritage Program has developed a prototype analysis of the status of Colorado's biodiversity, using a scorecard approach. Following the three-part model of effective conservation developed by The Nature Conservancy, our scorecard evaluated the status of ecological systems, animals, and rare plants under three broad categories: 1) Biodiversity status - including size, quality; and landscape integrity 2) Threat status - focused on both current and potential future impacts; and 3) Protection status. Plants, animals, and ecological systems can only be considered effectively conserved when their biodiversity status is viable, threats have been abated, and land management/protection is sufficient to ensure the long-term persistence of the element.Item Open Access Weed and rare plant assessments on selected BLM ACECs(Colorado State University. Libraries, 2001-06) Anderson, David G., author; Lyon, Peggy, author; Panjabi, Susan Spackman, author; Handwerk, Jill, author; Colorado Natural Heritage Program, publisher