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Joseph J Apodaca

Joseph J Apodaca
Tangled Bank Conservation · JJ (at) tbconservation.org

PhD

About

22
Publications
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778
Citations

Publications

Publications (22)
Article
Full-text available
Estimating levels of gene flow and assessing levels of population connectivity are of critical importance to the field of conservation genetics, especially for imperiled species. Many factors can influence dispersal and therefore gene-flow patterns across a natural landscape. These patterns can be substantially altered by the impacts of habitat mod...
Article
Full-text available
Abstract Many inferences about contemporary rates of gene flow are based on the assumption that the observed genetic structure among populations is stable. Recent studies have uncovered several cases in which this assumption is tenuous. Most of those studies have focused on the effects that regular environmental fluctuations can have on genetic str...
Article
Full-text available
Comparative studies documenting a relationship between male gonadal investment and the degree of sperm competition (SC) have usually considered the association between these traits to be driven by qualitative differences in the mating system, such as whether spawning occurs in pairs or groups. However, ecological and demographic differences between...
Article
1. Determining the factors that influence the distribution of species has been a longstanding goal in the field of ecology. New techniques such as ecological niche modelling have the potential to aid in addressing many broad questions in ecology, evolutionary biology, and behavioural ecology. 2. This study combines broad-scale ecological niche mode...
Article
Full-text available
Being able to efficiently and accurately delimit species is one of the most basic and important aspects of systematics because species are the fundamental unit of analysis in biogeography, ecology, and conservation. We present a rationale and approach for combining ecological niche modeling, spatially explicit analyses of environmental data, and ph...
Article
Full-text available
Cryptic species present particular challenges to biodiversity conservation, as true species diversity and distributional boundaries remain obscured. However, modern molecular tools have afforded unparalleled opportunities to elucidate cryptic species, define their distributions, and, ultimately, develop conservation interventions to extend their ev...
Article
Full-text available
Green salamanders (Plethodontidae: Aneides aeneus) are rock outcrop habitat specialists, possessing numerous unique morphological adaptations (e.g., prehensile tail and squared toe-pads) for climbing. Some authors believe A. aeneus, which is widely distributed across the Appalachian Mountains of the inland eastern United States, comprises a species...
Article
Full-text available
Effective conservation planning relies on accurate species detection. However, conventional sampling methods used for detecting rare and cryptic aquatic species suffer from low probabilities of detection. Environmental DNA (eDNA) has emerged as an innovative and powerful sampling tool for detecting aquatic species, with previous studies suggesting...
Article
Full-text available
• Population declines and local extirpation trends are widespread among freshwater species, but the responsible drivers of these trends are poorly understood. Identifying the potential drivers of population declines is essential to effective conservation planning. However, conventional detection methods used to monitor cryptic and elusive freshwate...
Article
Full-text available
Changes in body size and breeding phenology have been identified as two major ecological consequences of climate change, yet it remains unclear whether climate acts directly or indirectly on these variables. To better understand the relationship between climate and ecological changes, it is necessary to determine environmental predictors of both si...
Article
Full-text available
Knowledge of global biodiversity is essential for a basic understanding of Earth's ecosystems and for the conservation of life. Although many estimates of species numbers have been attempted using various techniques, many smaller phyla remain poorly known without such estimates. For most of these it is unclear if they are species-poor or just poorl...
Article
Understanding the scales over which land use affects animal populations is critical for conservation planning, and it can provide information about the mechanisms that underlie correlations between species distributions and land use. We used a citizen science database of anuran surveys to examine the relationship between road density, land use and...
Article
Many species of conservation concern are habitat limited and often a major focus of management for these species is habitat acquisition and/or restoration. Deciding the location of habitat restoration or acquisition to best benefit a protected species can be a complicated subject with competing management objectives, ecological uncertainties and st...
Article
Full-text available
Science is in everything that PARC does; the involvement of scientists and experts on species and conservation issues is what keeps our efforts current and useful. At the national scale, we tackle large, overarching issues, while at regional and state scales, we tackle more specific and focused issues. At all levels, there are opportunities for any...
Article
Full-text available
Forestry practices are placing ever increasing emphasis on sustainability and the maintenance of ecological processes, biodiversity, and endangered species or populations. Balancing timber harvest and the management of imperiled species presents a particularly difficult challenge during this shift, as we often know very little about these species'...
Conference Paper
Background/Question/Methods Habitat loss and fragmentation represent significant threats to amphibians. Fragmentation is particularly harmful because many amphibians migrate between aquatic and terrestrial habitats, and even narrow bands of unsuitable habitat can act as barriers to movement. Additionally, amphibians are slow-moving and prone to r...
Article
We isolated and characterized 12 microsatellite loci from the endangered Red Hills salamander, Phaeognathus hubrichti. Loci were screened in 24 individuals of P. hubrichti. The number of alleles per locus ranged from 2 to 16, observed heterozygosity ranged from 0.130 to 0.750, and the probability of identity values ranged from 0.012 to 0.778. These...

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