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This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

Mountain Lion Habitat Model for NSNF Connectivity - CDFW [ds1045]

Metadata Updated: November 27, 2024

The Maxent modeling algorithm was used to build the species distribution model at 270 m spatial resolution using species occurrence points and environmental layers as predictors (Phillips et al. 2006). Species occurrence points were primarily obtained from CNDDB (California Natural Diversity Database) and other CDFW sources, GBIF (Global Biodiversity Information Facility), PRBO (Point Blue Conservation Science) and Arctos museum databases. Vegetation, distance to water, elevation, and bioclimatic variables (Franklin et al. 2013) were used as predictor variables. The models were run at 270 m spatial resolution with five replications using cross-validation as a method of sample evaluation. Cross-validation involved the partitioning of the sample data into n subsets, fitting the models to n-1subsets, and testing the model on the one subset not used in fitting the model. Initial model runs showed that our models converged around 2,000 iterations and for this reason we ran all models with 2,500 maximum iterations. Maxent was implemented in R using the ‘dismo''package (Hijmans et al. 2011). Model evaluation was carried out using the ‘PresenceAbsence''package in R (Freeman and Moisen 2008). We used AUC as a metric to evaluate model performance. The package also computes threshold values using several accuracy metrics to translate predicted probability maps into binary suitable and unsuitable habitats. We selected the MeanProb, a threshold set based on the mean predicted probability of species occurrences. The output from Maxent are grid datasets in a multiband ‘tif''format with one band for each replication. We averaged the five replicated maps and created a mean grid for each species. The grid was then symbolized to represent low (threshold-50), medium (50-75) and high (75-100) habitat suitability, with pixel values that are below the threshold excluded. Models were reviewed by CDFW species experts; please review the use limitations.For more information see the project report at [https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=85358].

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: See this page for license information.

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Dates

Metadata Created Date September 29, 2023
Metadata Updated Date November 27, 2024

Metadata Source

Harvested from State of California

Additional Metadata

Resource Type Dataset
Metadata Created Date September 29, 2023
Metadata Updated Date November 27, 2024
Publisher California Department of Fish and Wildlife
Maintainer
Identifier 95ca0ec2-e819-4481-9e72-1ebebc189e59
Data First Published 2023-09-25T18:58:41.000Z
Data Last Modified 2023-09-25T19:02:30.000Z
Category Natural Resources
Public Access Level public
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 37b528be-d4b8-4887-b18d-aba442d447f7
Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
Harvest Source Title State of California
License http://www.opendefinition.org/licenses/cc-by
Source Datajson Identifier True
Source Hash 778e12ddbeb124578dd7a31d58001dbdf0308ccbebc10f9e94b5f67a95c7d565
Source Schema Version 1.1

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