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ARSN News: Job Opening - Biologist II - Ecology Option - Alabama Aquatic Biodiversity Center
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The Alabama Department of Personnel is now accepting applications for Biologist II / Ecology Option positions statewide.
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News & Events
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ARSN News: Please Help NC Reel In Interested Fisheries Professionals
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This is YOUR CHANCE come snorkel with the hellbenders!!!
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News & Events
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Arter 1989.pdf
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Resources
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TRB Library
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ANO-AYE
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Artificial Nest Box Research
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Research
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Assemblage Time Series Reveal Biodiversity Change but Not Systematic Loss
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The extent to which biodiversity change in local assemblages contributes to global biodiversity
loss is poorly understood. We analyzed 100 time series from biomes across Earth to ask how diversity
within assemblages is changing through time. We quantified patterns of temporal a diversity, measured
as change in local diversity, and temporal b diversity, measured as change in community composition.
Contrary to our expectations, we did not detect systematic loss of a diversity. However, community
composition changed systematically through time, in excess of predictions from null models.
Heterogeneous rates of environmental change, species range shifts associated with climate change,
and biotic homogenization may explain the different patterns of temporal a and b diversity.
Monitoring and understanding change in species composition should be a conservation priority.
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Resources
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Climate Science Documents
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Assessing Future Energy Development
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Assessing Liability as an Impediment to Fire Use
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Prescribed Burning
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Policy and Regulations
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Assessing potential climate change effects on vegetation using a linked model approach
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We developed a process that links the mechanistic power of dynamic global vegetation models with the detailed vegetation dynamics of state-and-transition models to project local vegetation shifts driven by projected climate change. We applied our approach to central Oregon (USA) ecosystems using three climate change scenarios to assess potential future changes in species composition and community structure. Our results suggest that: (1) legacy effects incorporated in state-and-transition models realistically dampen climate change effects on vegetation; (2) species-specific response to fire built into state-and- transition models can result in increased resistance to climate change, as was the case for ponderosa pine (Pinus ponderosa) forests, or increased sensitivity to climate change, as was the case for some shrublands and grasslands in the study area; and (3) vegetation could remain relatively stable in the short term, then shift rapidly as a consequence of increased disturbance such as wildfire and altered environmental conditions. Managers and other land stewards can use results from our linked models to better anticipate potential climate-induced shifts in local vegetation and resulting effects on wildlife habitat.
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Resources
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Climate Science Documents
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Assessing Road Stream Crossing Barriers in the United States
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This is an instant app to view field survey data collected by SARP and partners using the North Atlantic Aquatic Connectivity Collaborative aquatic organism passage survey protocol
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Resources
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Products
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Assessing the Causes of Late Pleistocene Extinctions on the Continents
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One of the great debates about extinction is whether humans or climatic change caused the demise of the Pleistocene megafauna. Evidence from paleontology, climatology, archaeology, and ecology now supports the idea that humans contributed to extinction on some continents, but human hunting was not solely responsible for the pattern of extinction everywhere. Instead, evidence suggests that the intersection of human impacts with pronounced climatic change drove the precise timing and geography of extinction in the Northern Hemisphere. The story from the Southern Hemisphere is still unfolding. New evidence from Australia supports the view that humans helped cause extinctions there, but the correlation with climate is weak or contested. Firmer chronologies, more realistic ecological models, and regional paleoecological insights still are needed to understand details of the worldwide extinction pattern and the population dynamics of the species involved.
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Resources
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Climate Science Documents
