Using species distribution and occupancy modeling to guide survey efforts and assess species status

Peterman, William E.; Crawford, John A.; Kuhns, Andrew R.

doi:10.1016/j.jnc.2012.11.005

Cited by 62 publications

(50 citation statements)

References 51 publications

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“…The predictive value of the model depends not only on the accuracy of the models with respect to capturing the selected components of habitat, but also on the extent to which typically selected habitats are occupied (and typically unselected habitats unoccupied), which can only be determined through independent future surveys guided by the model (e.g., Peterman et al 2013). Such surveys would produce an estimate of occupancy within predicted-presence (and predicted-absence) habitat, which also would provide the basis to estimate the abundance of Sacramento Valley red foxes from locally obtained data on home range and family group size.…”

Section: Discussionmentioning

confidence: 99%

“…However, when little is known about the correlates of a species' distribution over large regions, presence-only data can provide a more efficient and practical means of developing preliminary distribution models, which, in turn, can be used to guide more efficient and robust occupancy surveys in the future Peterman et al 2013). When sample sizes allow, likelihood-based resource selection functions (Johnson et al 2006) combined with information-theoretic methods of model selection and averaging (Burnham and Anderson 2002) offer powerful presence-only approaches to statistically test selection of land-cover types and estimate probabilities of occurrence .…”

Section: Introductionmentioning

confidence: 99%

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A Preliminary Range-Wide Distribution Model for the Sacramento Valley Red Fox

Sacks

Statham

Wittmer

2016

Journal of Fish and Wildlife Management

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The Sacramento Valley red fox Vulpes vulpes patwin of California is a newly named subspecies recently found to be distinct both from other native red foxes and nearby introduced populations. The Sacramento Valley red fox experienced a historical demographic bottleneck resulting in a critically small genetic effective population size, causing concern over its current status and management requirements, yet little is known about its contemporary abundance, demographic trajectory, or habitat use. The hot, arid Sacramento Valley contrasts starkly in climate and physiography with the boreal habitats of other indigenous red foxes in western North America, indicating the need to obtain information specifically on the habitat requirements of this subspecies. A 3-y effort to locate reproductive den sites throughout the Sacramento Valley resulted in 42 independent dens, which we used to obtain preliminary information on habitat use and to develop a distribution model for this subspecies, and 28 Sacramento Valley red foxes killed by vehicles, which we used as independent data to test the models. Foxes were present significantly more than expected in grasslands and less than expected in wetlands and flooded agriculture and also tended to occur in proximity to human development, potentially as refuges from coyotes Canis latrans. We used Maxent to build predictive models. The best model, which incorporated vegetation/land-use classes and proximity to human development, identified 24% of the study area as predicted-presence habitat, which contained 76% of the den sites used to construct the model and 89% of independent locations used to test the model. Our model greatly narrowed the area over which foxes are predicted to occur and will facilitate future surveys to assess occupancy and ultimately abundance and population trends.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Preliminary Range-Wide Distribution Model for the Sacramento Valley Red Fox

Sacks

Statham

Wittmer

2016

Journal of Fish and Wildlife Management

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“…Our results add to the body of evidence on the relevance of ecological niche models for predicting local and regional occurrence of species within their native ranges (Trumbo et al 2011;Peterman et al 2013), and in novel environments (Gormley et al 2011;Vaclavik and Meentemeyer 2012). While climate alone may oversimplify the spatial extent of invasions, ecological niche models for patchily-distributed generalist species are a reliable alternative to using data intensive methods that require substantial resources and foresight.…”

Section: Discussionmentioning

confidence: 58%

Relative performance of ecological niche and occupancy models for predicting invasions by patchily-distributed species

et al. 2015

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Ecological niche models (ENM) have been used with mixed success for predicting the geographic extent of non-native species to aid management and conservation. This approach is problematic for predicting invasions of patchily-distributed species (e.g., pond-breeding amphibians), whose occurrence is often determined by local habitat conditions. Here, we tested the performance of bioclimatic ENM for predicting occurrence (from repeated surveys) of two non-native pond-breeding anurans at 71 wetlands in British Columbia, Canada: permanent pond specialist American bullfrog (Lithobates catesbeianus), and generalist green frog (Lithobates clamitans). For L. catesbeianus, we assessed the risk of invasion beyond the invasion front. We found higher correlation between ENM and occupancy predictions for L. clamitans (r s = 0.58), than for L. catesbeianus (r s = -0.26). L. clamitans occurrence was highest at low elevations and high annual precipitation; in contrast, L. catesbeianus occupancy was predicted by wetland connectivity and distance from a historic introduction site [low at isolated ponds [50 km from the introduction site, and high ([0.8) at all ponds with [10 % water within 500 m]. Conditional on successful dispersal, four sites beyond the L. catesbeianus invasion front surveyed in this study were at high risk of invasion due to high habitat suitability (proportion of area occupied = 0.33; 0.04-0.83, 95 % CI). In conclusion, ENMs may be useful for informing invasion management for climate driven wetland species, but repeated sampling is necessary to predict invasions for habitat-driven wetland species.

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“…Using these methods to thoroughly search every site and given the small area searched at each site (< 5 m 2 salamanders (adults, larvae, and eggs) within each site once during the course of the study we could not estimate detection probabilities (Mazerolle et al 2007). Other studies have estimated detection probabilities for Ambystoma from 0.459 to 0.89 (Corn et al 2005, Hossack and Corn 2007, Gorman et al 2009, Peterman et al 2013; however, all of these refer to larger pond or wetland habitats and not to streams or sites as small as our sites. Detection probabilities of nonambystomatid salamanders in streams range from 0.39-0.96 (Jung et al 2005, Kroll et al 2010.…”

Section: Methodsmentioning

confidence: 80%

Natural history of the critically endangered salamander Ambystoma leorae (Caudata: Ambystomatidae) from the Río Tonatzin, Mexico

Lemos‐Espinal¹,

Smith

Zamora³

et al. 2017

Phyllomedusa

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Natural history of the critically endangered salamander Ambystoma leorae (Caudata: Ambystomatidae) from the Río Tonatzin, Mexico. In Mexico, many species of Ambystoma are endangered, but unfortunately little is known about their natural history and ecology. We report on aspects of the natural history of A. leorae, a critically endangered endemic salamander, from the Río Tonatzin, State of México, Mexico. We observed egg masses, which were attached to vegetation, from April to June, with a mean of 7.28 eggs per egg mass. Larval A. leorae were found in sections of the Río Tonatzin with muddy bottoms and submerged aquatic vegetation. We observed adult and juvenile salamanders throughout the year except September, but with a peak from May to July. The use of sites along the Río Tonatzin by adult and juvenile A. leorae was driven primarily by vegetation type and substrate type of the site, with mud or sand substrate with grass roots and submerged aquatic vegetation being the most used site types. We found no evidence of sexual dimorphism in A. leorae. Our results suggest that adult and juvenile A. leorae use a variety of stream sites, although larvae appear to be more limited in their use of stream sites. These observations indicate that to maintain this population of A. leorae, the general conditions existing in the Río Tonatzin should be protected, especially the sections with muddy bottoms and aquatic vegetation where larvae, juveniles, and adults are found.

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Using species distribution and occupancy modeling to guide survey efforts and assess species status

Cited by 62 publications

References 51 publications

A Preliminary Range-Wide Distribution Model for the Sacramento Valley Red Fox

A Preliminary Range-Wide Distribution Model for the Sacramento Valley Red Fox

Relative performance of ecological niche and occupancy models for predicting invasions by patchily-distributed species

Natural history of the critically endangered salamander Ambystoma leorae (Caudata: Ambystomatidae) from the Río Tonatzin, Mexico

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