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The endemic subspecies of the Pacific sheath-tailed bat (payeyi; Emballonura semicaudata rotensis), and the Mariana swiftlet (chachaguak; Aerodramus bartschi) once inhabited many of the islands that comprise the Mariana archipelago (Lemke 1986, Flannery 1995, Ellison et al. 2003, Cruz et al. 2008). Both are insectivorous species that roost or nest almost exclusively in natural limestone caves (Pratt et al. 1987). Population threats to these two species primarily include habitat loss from past clearing of native forest for agriculture, with subsequent replacement by invasive vegetation (particularly Lantana camara), habitat degradation from feral goat browsing, persistent disturbance of nests and roosts, pesticide...
This project will compare relative Culex abundances, and the prevalence of Plasmodium relictum, in mosquitoes and birds at the upper and lower bounds of a key portion of the kiwikiu and ‘akohekohe ranges. This information will be used to inform the design and implementation of landscape-level mosquito control technique. In addition, it will provide critical information on habitat suitability and imminent disease risk for the two critically endangered Maui forest birds. This project will provide baseline comparative information on mosquito distribution and avian malaria infection prevalence in mosquitoes and birds within a key portion of kiwikiu and ‘akohekohe range. The project products will be made available to...
The objective of the project is to provide the Hawaii Division of Aquatic Resources (DAR) with easy-to-use geospatial tools necessary to running a science-based participatory 30x30 planning process, and the technical support and iterative evaluation activities required to ensure the tools are implemented effectively. The work will enable stakeholders to effectively engage with relevant spatial data and information as they identify areas for consideration in the 30x30 planning. The project will accomplish the proposed objectives by: 1) providing spatial data layers in the interactive SeaSketch platform; 2) working closely with DAR staff on facilitation technique; 3) reproducing existing analytical tools developed...
The Hakalau Forest National Wildlife Refuge (Refuge), on the windward slopes of Mauna Kea, Hawai’i, is an important habitat for Hawaiian forest birds and plants, several of which are listed as endangered. Surrounding lands are managed by a variety of entities for conservation and other purposes. This landscape is experiencing environmental change, and is projected to experience altered temperatures and rainfall patterns in coming decades. In turn, these changes will likely alter the distributions of invasive weeds and mosquitoes, and reduce or eliminate populations of sensitive native species. The Refuge has conducted extensive forest restoration, and adjacent landowners are also conducting restoration activities....
ABSTRACT: Bull trout movement patterns are largely unknown in the Upper Yakima River, and little data is available to inform spatial and temporal habitat use. However, the Service is in possession of a small number of genetic samples (n=25) collected at and near Roza Dam, which is located approximately halfway between the Upper Yakima and Naches Rivers local populations of bull trout. The Yakima core area is the largest core area in Washington located wholly within the state. Analysis of these samples would inform which local populations make movements within the vast Yakima Basin and whether there are interactions with bull trout from adjacent core areas, and would be extremely valuable to Mid-Columbia recovery...
ABSTRACT: The end product are maps and databases depicting habitat connectivity for particular species that are surrogates for a broader range of species. The surrogate Species connectivity modeling includes two components. First, each Surrogate Species’ breeding/home range habitats are modeled using empirically-derived variables such as land cover information and habitat patch size. Portland State University will deliver the results of this modeling effort to Metro in July 2018. Second, the best apparent connectivity habitat is modeled based on variables such as surrogate species’ permeable habitats that may not be sufficient for breeding but passable for travel; distance between stepping stone habitats; and likely...
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Linkage Networks’ Synthesis Analysis The focal species and landscape integrity approaches identify habitat concentration areas (HCAs) and core habitats, respectively, and areas of the landscape important for connecting them. As in the Statewide Analysis and the Analysis of the Columbia Plateau Ecoregion (WHCWG, 2010, 2012), we consider that a linkage network consists of the combination of all the HCAs and the linkages modeled for a particular focal species, or core areas and modeled linkages for landscape integrity (WHCWG, 2010). These networks are useful individually, informing decisions pertaining to maintaining and restoring connectivity for the particular focal species (or species considered similar enough in...
The Hakalau Forest National Wildlife Refuge on the windward slopes of Mauna Kea is an important habitat for native forest birds and plants, including several threatened and endangered species. The region has been subjected to a variety of pressures over time, including clearing of large swaths of native forest for agriculture and livestock grazing, the intentional and accidental introduction of invasive plants and animals that have degraded habitats and outcompeted native species (e.g., pigs, rats, mosquitos, Japanese white-eye), and climate change-driven changes in temperatures, rainfall patterns, and wildfire regimes. Surrounding lands are managed by a variety of entities for conservation and other purposes (e.g.,...
Conservation partners in Hawaii are tasked with protecting and restoring native ecosystems across remote and varied landscapes in the face of continuous invasions of novel threats and a changing climate. Hundreds of species have been lost to extinction and hundreds more remain at risk. To guide their efforts, managers have dozens of excellent recovery plans that comprise reams of pages. Implementing those plans, however, poses an often‐overwhelming challenge because funds are not currently adequate to implement every plan in every place. As a result, managers make tough decisions on where to focus effort and which conservation actions should be implemented first. Those decisions must include locations and actions...
Recent work to extend the instrumental record of Hawaiian rainfall (available since the early 1900s ) back several centuries indicates the presence of large and significant variations in rainfall on decadal time scales (see time series graphic above). Parallel efforts to understand agricultural changes in the Hawaiian Islands prior to European influences suggests that after about 1650 CE there was a shift in emphasis to productive maximizing strategies, with implications for the region’s economic and socio-political stability.The above is one of the motivating ideas for conducting this workshop. Previous work by several of the participants argued that an increased reliance on risky product maximization strategies...
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Formed in 2007, the Washington Wildlife Habitat Connectivity Working Group (WWHCWG) is an open collaborative science-based effort to produce tools and analyses that identify opportunities and priorities to provide habitat connectivity in Washington and surrounding habitats (https://waconnected.org). The WWHCWG began with a Statewide Habitat Connectivity Analysis, which highlighted several regions of the state that would benefit from finer-scale analyses. The group has since conducted analyses across many of those regions. The US Fish and Wildlife Service provided funding to develop habitat connectivity models for one of the remaining regions–Washington’s Cascades to Coast region. The goal of this project was to...
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The Washington Connected Landscapes Project: Cascades to Coast Analysis produced the following geospatial data layers for landscape integrity: (1) a raster dataset depicting habitat suitability, (2) a vector dataset of core habitat depicting areas of high concentrations of suitable habitat, (3) a raster dataset depicting the landscape’s resistance to movement, (4) a raster dataset of cost-weighted distance depicting the permeability of the landscape for movement between core habitat areas, (5) a vector dataset depicting the least-cost paths between core habitat areas, and (6) a raster dataset depicting the least-cost corridors between core habitat areas. The data layers are provided in multiple file formats that...
map background search result map search result map Washington Connected Landscapes Project: Cascades to Coast Analysis Synthesis Analysis Geospatial Dataset Landscape Integrity Geospatial Dataset Washington Connected Landscapes Project: Cascades to Coast Analysis Synthesis Analysis Geospatial Dataset Landscape Integrity Geospatial Dataset