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This package contains 13 polygon layers representing baseline and predicted future climate niches (2050s & 2080s) of Pacific silver fir (Abies amabilis). The modeling algorithm Maxent and the Worldclim predictor set have been used to compute niche projections under two emission scenarios (A1B & A2A) based on three general circulation models (CSIRO, CCCMA & HADCM3). The shapefiles are derived from gridded model outputs with a grid cell resolution of 30 arc-seconds.
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The dataset contains 3 maps that show the current and predicted range of Pacific Silver Fir (Abies amabilis) in the Pacific Northwest region. The layers include: 1) the species range modeled under current climate conditions for 1950-75 2) a continuous model of the predicted range for 1950-2006 and 3) potential range expansion and contraction from 2000-2009.
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This package contains 13 polygon layers representing baseline and predicted future climate niches (2050s & 2080s) of Pacific silver fir (Abies amabilis). The modeling algorithm Maxent and the Worldclim predictor set have been used to compute niche projections under two emission scenarios (A1B & A2A) based on three general circulation models (CSIRO, CCCMA & HADCM3). The shapefiles are derived from gridded model outputs with a grid cell resolution of 30 arc-seconds.
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This dataset contains 8 layers showing current and predicted ranges of Pacific silver fir(Abies amabilis ). One layer demonstrates range according to current climate conditions averaged from the period 1950-1975. Six layers model predicted ranges according to two different IPCC scenarios according to their Canadian Climate Centre modeling and Analysis (CCCma) third generation general correlation models (CGCM3) A2 and B1, in the years 2020, 2050, and 2080. An 8th layer shows a continuous model of predicted occurrence for the period 1975-2006.
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Projected current and future distributions of Abies amabilis (Pacific silver fir), Abies grandis (Grand fir), Abies procera (Noble fir), Acer macophylla (Big leaf maple), Larix lyallii (Subalpine larch), Larix occidentalis (Western larch), Pinus albicaulis (Whitebark pine), Quercus garryana (Garry oak), Taxus brevifolia (Pacific yew), Thuja plicata (Western red cedar) based on empirical bioclimatic models. Tree distributions models were built using 42 climate and bioclimatic variables from Climate Western North America climate dataset (www.climatevulnerability.org). I used random forest to project USGS range maps (http://esp.cr.usgs.gov/data/little/) for historical (1961-1990) and five general circulation models...


    map background search result map search result map Baseline and predicted future climate niches of Pacific silver fir (Abies amabilis) based on three general circulation models and two emission scenarios Current and predicted range of Pacific SIlver Fir under climate change in the Pacific Northwest Baseline and predicted future climate niches of Pacific silver fir (Abies amabilis) based on three general circulation models and two emission scenarios Modeled frequency and predicted range of Pacific silver fir (Abies amabilis) under various climate scenarios Projected baseline and future tree distributions in the Pacific Northwest for 10 species under five SRES A2 CMIP3 GCMs for 2070-2099 Baseline and predicted future climate niches of Pacific silver fir (Abies amabilis) based on three general circulation models and two emission scenarios Baseline and predicted future climate niches of Pacific silver fir (Abies amabilis) based on three general circulation models and two emission scenarios Modeled frequency and predicted range of Pacific silver fir (Abies amabilis) under various climate scenarios Projected baseline and future tree distributions in the Pacific Northwest for 10 species under five SRES A2 CMIP3 GCMs for 2070-2099 Current and predicted range of Pacific SIlver Fir under climate change in the Pacific Northwest