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This dataset represents current terrestrial intactness values (estimated at the 1km level) within the modeled distribution of the Flat-tailed horned lizard (Phrynosoma mcallii). Terrestrial intactness is high in areas where development is low, vegetation intactness is high, and fragmentation is low. Consequently, this dataset serves as a general* indication of habitat quality within the distribution of this conservation element. Estimates of current terrestrial intactness were generated by an EEMS fuzzy logic model that integrates multiple measures of landscape development and vegetation intactness, including agriculture development (from LANDFIRE EVT v1.1), urban development (from LANDFIRE EVT v1.1 and NLCD Impervious...
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These data are statistical model outputs for Flat-tailed horned lizard (Phrynosoma mcallii) species distribution, completed by Frank Davis’ Biogeography Lab at UC Santa Barbara. The UCSB Biogeography Lab used Maxent to generate predictions of habitat occupancy for ~70 species for the CA Energy Commission’s project “Cumulative Biological Impacts Framework for Solar Energy in the CA Desert”, 500-10-021. Species distribution models were produced at 270 m resolution using a subset of 22 environmental variables. Models were evaluated with 10-foldcross validated AUC scores. Results are preliminary and have notyet been reviewed by expert biologists. Both continuous probability surfaces and binary layers are available...
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These data are statistical model outputs for Flat-tailed horned lizard (Phrynosoma mcallii) species distribution, completed by Frank Davis’ Biogeography Lab at UC Santa Barbara. Based on examination of species observation data and consultation with biologists, CBI used the model's broad extent masked to the following USFS ecoregion subsections: 322Cd, 322Cc, 322Cb, 322Ca. Post-processing was also performed to remove scattered pixels in the agricultural lands to the south of the Salton Sea. Post-processing was performed again on 6/25/2013 to remove additional habitat predicted in agricultural lands. The binary layer depicts predicted suitable habitat using the equal training sensitivity and specificity threshold...
All species of the genus Phrynosoma are cryptically colored and patterned, but two species have bold black or white vertebral-line patterns on their dorsal surfaces. Phrynosoma mcallii lives on aeolian-sand substrates and often rests below shrubs. It has a black vertebral line which is hypothesized to mimic dark shadows of stems falling on the smooth, litter-free sand beneath shrubs. Phrynosoma cornutum inhabitats grasslands and arid shrub-habitats in which below-shrub sites are littered with bleached plant stems. The white middorsal stripe of this species is thought to mimic white stems of the under-shrub litter. Although crypticity in horned lizards has been extensively studied, the two examples of apparent object...
    map background search result map search result map Flat-tailed horned lizard - Species Distribution Model, DRECP Flat-tailed horned lizard - UCSB Species Distribution Model, CA Desert Flat-tailed horned lizard - Habitat Intactness, DRECP Flat-tailed horned lizard - Habitat Intactness, DRECP Flat-tailed horned lizard - Species Distribution Model, DRECP Flat-tailed horned lizard - UCSB Species Distribution Model, CA Desert