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Endemism and the assessment of conservation priority Brad Boyle, Brian J. Enquist, Michael D. Weiser University of Arizona
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Conservation in the fast lane Two complementary approaches Rapid Assessment Program Hotspots
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Myers, et al., 2000 Hotspots Program Identifies global conservation priorities Scale: –regional –usually one to several countries
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Rapid Assessment Program Information for specific conservation actions Scale: –Local –Specific region within single country
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Hotspots RAP indicators:
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Hotspots RAP risk indicators:
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Hotspots RAP risk diversity indicators:
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Hotspots RAP risk diversity endemism indicators:
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Hotspots RAP risk diversity endemism Conservation action
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Hotspots RAP risk diversity endemism Conservation action
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Endemism
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Important indicator of conservation priority
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Endemism Important indicator of conservation priority However…
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Endemism Important indicator of conservation priority However… Typically “tallied” at the scale of entire countries
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Endemism Important indicator of conservation priority However… Typically “tallied” at the scale of entire countries Little information at more local scales
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Endemism Important indicator of conservation priority However… Typically “tallied” at the scale of entire countries Little information at more local scales No standard baseline
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Can SALVIAS improve our ability to assess endemism?
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Plant endemism within the Mesoamerican Hotspot
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Mesoamerican Hotspot 8 countries 1.1 million sq km 24,000 plant species 5,000 endemic http://www.biodiversityhotspots.org/xp/Hotspots/mesoamerica/
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Mesoamerican Hotspot Within hotspot, how do major habitats and geopolitical subdivisions within hotspot differ in plant endemism, and hence conservation priority? http://www.biodiversityhotspots.org/xp/Hotspots/mesoamerica/
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Mesoamerican Hotspot Within hotspot, how do major habitats and geopolitical subdivisions within hotspot differ in plant endemism, and hence conservation priority? Globally, how do subdivisions within the Mesoamerican Hotspot rank in endemism? http://www.biodiversityhotspots.org/xp/Hotspots/mesoamerica/
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Data sources Local inventories from SALVIAS database Species distributions estimated from specimen records using SALVIAS distributed query
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Response variables Calculated total and percent endemic species per plot Endemic species: entire range within 2.5 x 2.5 deg. lat x long (=78,000 km 2 ; cf. Pitman et al., 1999)
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Costa Rica Southern Mexico (Oaxaca, Veracruz) Categories: two regional subdivisions
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Elevation (m) Precip (mm) Montane rain forest27503000-4000 Lower montane rain forest17503500-5000 Premontane rain forest7504500-5500 Tropical wet forest504000-4500 Tropical dry forest501000-1600 Categories: five vegetation types
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Comparisons Within Mesoamerica Total and proportion endemic species for each vegetation types in each sub-region Globally Ranked Mesoamerican samples relative to entire global SALVIAS inventory dataset
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Number of inventories Global: 280 Tenth ha plots by Gentry, Boyle, and others > 20 individual data contributors
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Number of inventories Mesoamerican hotspot: 33 Costa RicaMexico Montane rain forest33 Lower montane rain forest33 Premontane rain forest32 Tropical wet forest31 Tropical dry forest57
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Species ranges From 23 herbarium specimen databases using SALVIAS InstitutionCoverageDatabase Type MO Botanical Garden (Tropicos) N, S, & C. AmericaSingle online REMIBMexicoDistributed (17 databases) Univ. B.C.NW North AmericaSingle online Univ. TennesseeE USASingle online Univ. OregonNW North AmericaSingle online Univ. TexasSW USASingle online Univ. ArizonaSW USALocal
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Data returned by SALVIAS Species (fully determined) Specimens
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Data returned by SALVIAS Species (fully determined) Global dataset 7,369 Mesoamerican plots 909 Specimens
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Data returned by SALVIAS Species (fully determined) Global dataset 7,369 Mesoamerican plots 909 Specimens Total 1.9 million Total, non-cultivated, with coordinates 1.2 million
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How does endemism differ within the Mesoamerican Hotspot?
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Endemism rankings of Mesoamerican 0.1 ha plots
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Highest-ranking Mexican plots tropical dry forest or premontane rain forest
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Highest-ranking Costa Rican plots all wet forest, all elevations
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Lowest-ranking Costa Rican plots mostly tropical dry forest
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Total endemics
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Proportion endemics
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How does Mesoamerican plant endemism rank globally?
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Global rankings
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Mesoamerica
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Top 5%
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Mata Atlantica, Brazil
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New Caledonia
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Choco biogeographic province
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Andean montane forests
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Amazonian foothill forests
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Nearly fourfold variation Differences between regions depended on vegetation types… Conclusions: Mesoamerican plant endemism
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Costa Rican dry forest ranked last in both total and percent endemics Conclusions: Mesoamerican plant endemism
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Costa Rican dry forest ranked last in both total and percent endemics Costa Rican rain forest (all elevations) relatively rich in endemics Conclusions: Mesoamerican plant endemism
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Mexican dry forest 2.5 x richer in endemic species than Costa Rican dry forest among highest ranks in Mesoamerican region
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Mexican dry forest 2.5 x richer in endemic species than Costa Rican dry forest among highest ranks in Mesoamerican region Mexican premontane forest rich in endemics high priority within the hotspot. Conclusions: Mesoamerican plant endemism
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Conclusions: Global endemism Mesoamerican forests average on a global scale
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Conclusions: Global endemism Mesoamerican forests average on a global scale Globally highest-ranking sites restricted biogeographic regions with humid lowland aseasonal forest: Mata Atlantica, Colombian Choco Wet tropical montane forests
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Conclusions: SALVIAS A global baseline for endemism and species distributions
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Conclusions: SALVIAS A global baseline for endemism and species distributions Potentially powerful tool for conservation assessment
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Thanks to: SALVIAS development team (University of Arizona) Brain Enquist, Mike Weiser, Srinivas Reddy (EEB) James Jeffers, Nirav Marchant (ARL) Numerous data contributors, but especially Missouri Botanical Garden Silvia Salas (SERBO-Oaxaca) Support Conservation International (CABS, TEAM) University of Arizona (EEB)
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