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Tennessee River Basin Boundary
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This data includes a shapefile of the boundaries of the entire Tennessee River Basin. The total are includes 41,027 square miles.
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Resources
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Data
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Tennessee River Basin Map
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This map depicts the boundaries of the Tennessee River Basin based on hydrologic units from U.S. Geoloogical Survey using the National Geogrpahic World Map as a basemap.
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TRB Images
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Tennessee River Basin with APP LCC Boundary
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This map depicts the boundaries of the Tennessee River basin defined using hydrologic units from the U.S. Gelogical Survey overlaid on the Appalachian LCC boundary using the National Geographic World Map as a basemap.
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TRB Images
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Terrestrial Records
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The karst map provides the basic template for analyzing the distribution of cave species. Almost without exception, all caves occur within the karst areas. There were a few records of cave-dwelling species from outside karst areas (mostly springs) but the data was trimmed to fit within the karst areas, with a 1 km buffer to allow for errors in georeferencing). This map displays the aquatic records within karst areas in the Appalachian region.
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Gallery: Cave and Karst Maps
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Study Overview Maps and Foundational Datasets
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Terrestrial Species Richness
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Distribution of terrestrial species richness in 20 kilometer grids throughout the Appalachian LCC region.
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Research
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Gallery: Cave and Karst Maps
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Study Overview Maps and Foundational Datasets
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Terrestrial Species Richness by County
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Distribution of terrestrial species richness at the county scale throughout the Appalachian LCC region.
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Gallery: Cave and Karst Maps
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Study Overview Maps and Foundational Datasets
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The Nature Conservancy Conservation Gateway
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Spatial data and maps are a crucial element in conservation science, and support meaningful contributions to conservation. Analyses require consistent, regional-scale spatial data and associated products. On this page, you can download the data The Nature Conservancy has used in their large-scale analyses.
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Data
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Public Data Repositories
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Three new darter species of the Etheostoma percnurum species complex (Percidae, subgenus Catonotus) from the Tennessee and Cumberland River Drainages
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The federally endangered Duskytail Darter, Etheostoma percnurum Jenkins, is known from only six highly disjunct populations in the Tennessee and Cumberland river drainages of Kentucky, Tennessee, and Virginia. Only four are extant. Variation in morphology including meristics, morphometrics, and pigmentation was examined among the four extant populations and limited specimens from the two extirpated populations (Abrams Creek and South Fork Holston River). Analyses of these data found each of the extant populations is morphologically diagnosable. The few specimens avail- able from Abrams Creek and South Fork Holston River prevented thorough assessment of variation, and these were grouped with their closest geographic counterparts, Citico Creek, and Little River, respectively. Three new morphologi- cally diagnosable species are described: E. sitikuense, the Citico Darter, from Citico Creek, Abrams Creek, and Tellico River (Tennessee River system); E. marmorpinnum, the Marbled Darter, from the Little River and South Fork Holston River (Tennessee River system); and E. lemniscatum, the Tuxedo Darter, from the Big South Fork (Cumberland River system). Each species warrants federal protection as an endangered species.
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Reports & Documents
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Toward rigorous use of expert knowledge in ecological research
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Practicing ecologists who excel at their work (‘‘experts’’) hold a wealth of knowledge. This knowledge offers a wide range of opportunities for application in ecological research and natural resource decision-making. While experts are often consulted ad-hoc, their contributions are not widely acknowledged. These informal applications of expert knowledge lead to concerns about a lack of transparency and repeatability, causing distrust of this knowledge source in the scientific community. Here, we address these concerns with an exploration of the diversity of expert knowledge and of rigorous methods in its use. The effective use of expert knowledge hinges on an awareness of the spectrum of experts and their expertise, which varies by breadth of perspective and critical assessment. Also, experts express their knowledge in different forms depending on the degree of contextualization with other information. Careful matching of experts to application is therefore essential and has to go beyond a simple fitting of the expert to the knowledge domain. The standards for the collection and use of expert knowledge should be as rigorous as for empirical data. This involves knowing when it is appropriate to use expert knowledge and how to identify and select suitable experts. Further, it requires a careful plan for the collection, analysis and validation of the knowledge. The knowledge held by expert practitioners is too valuable to be ignored. But only when thorough methods are applied, can the application of expert knowledge be as valid as the use of empirical data. The responsibility for the effective and rigorous use of expert knowledge lies with the researchers.
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Reports & Documents
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Training
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Tennessee River Basin Partnership Training resources
