Subtopic Deep Dive
Phylogenetic Analysis of Amphibian Declines
Research Guide
What is Phylogenetic Analysis of Amphibian Declines?
Phylogenetic analysis of amphibian declines applies phylogenetic trees to identify evolutionary patterns in extinction risk and decline vulnerability across amphibian clades.
Researchers use phylogenies to test for phylogenetic signal in traits linked to declines, such as disease susceptibility and habitat loss sensitivity (Sodhi et al., 2008; 488 citations). Studies reveal underestimation of species richness worsens decline assessments in Neotropics (Fouquet et al., 2007; 510 citations). Over 20 key papers since 2006 map pathogen evolution and clade-specific risks (Grant et al., 2006; 582 citations).
Why It Matters
Phylogenetic patterns guide conservation by pinpointing vulnerable clades, as in dart-poison frogs where systematics inform protection amid rising species counts (Grant et al., 2006). Sodhi et al. (2008) quantify drivers like disease and habitat loss, enabling targeted interventions. Pyron (2014) traces biogeographic history to predict dispersal-limited declines, aiding policy in hotspots. Jani and Briggs (2014) link microbiome disruptions to chytrid epidemics, informing probiotic strategies.
Key Research Challenges
Phylogenetic Signal Detection
Quantifying phylogenetic conservatism in decline traits remains challenging due to incomplete phylogenies and trait data gaps. Sodhi et al. (2008) highlight synergies among drivers complicating signal isolation. Advances require integrating fossils and molecular clocks (Pyron, 2014).
Pathogen Clade Specificity
Assessing ranavirus and chytrid evolution across amphibian phylogenies faces host-jumping detection issues. Gray et al. (2009) note multi-host infections obscure clade patterns. Jani and Briggs (2014) show microbiome shifts during epidemics demand longitudinal sampling.
Species Richness Underestimation
mtDNA analyses reveal cryptic diversity inflating decline risks in Neotropics (Fouquet et al., 2007). Integrating new phylogenies like Grant et al. (2006) into decline models requires updated IUCN assessments.
Essential Papers
PHYLOGENETIC SYSTEMATICS OF DART-POISON FROGS AND THEIR RELATIVES (AMPHIBIA: ATHESPHATANURA: DENDROBATIDAE)
Taran Grant, Darrel R. Frost, Janalee P. Caldwell et al. · 2006 · Bulletin of the American Museum of Natural History · 582 citations
Abstract The known diversity of dart-poison frog species has grown from 70 in the 1960s to 247 at present, with no sign that the discovery of new species will wane in the foreseeable future. Althou...
Underestimation of Species Richness in Neotropical Frogs Revealed by mtDNA Analyses
Antoine Fouquet, André Gilles, Miguel Vences et al. · 2007 · PLoS ONE · 510 citations
As a consequence the global amphibian decline detected especially in the Neotropics may be worse than realised.
Measuring the Meltdown: Drivers of Global Amphibian Extinction and Decline
Navjot S. Sodhi, David Bickford, Arvin C. Diesmos et al. · 2008 · PLoS ONE · 488 citations
Habitat loss, climate change, over-exploitation, disease and other factors have been hypothesised in the global decline of amphibian biodiversity. However, the relative importance of and synergies ...
A global reptile assessment highlights shared conservation needs of tetrapods
Neil A. Cox, Bruce E. Young, Philip Bowles et al. · 2022 · Nature · 378 citations
Biogeographic Analysis Reveals Ancient Continental Vicariance and Recent Oceanic Dispersal in Amphibians
R. Alexander Pyron · 2014 · Systematic Biology · 346 citations
Amphibia comprises over 7000 extant species distributed in almost every ecosystem on every continent except Antarctica. Most species also show high specificity for particular habitats, biomes, or c...
Ecology and pathology of amphibian ranaviruses
MJ Gray, Debra L. Miller, Jason T. Hoverman · 2009 · Diseases of Aquatic Organisms · 331 citations
Mass mortality of amphibians has occurred globally since at least the early 1990s from viral pathogens that are members of the genus Ranavirus, family Iridoviridae. The pathogen infects multiple am...
Understanding of the impact of chemicals on amphibians: a meta‐analytic review
Andrés Egea‐Serrano, Rick A. Relyea, Miguel Tejedo et al. · 2012 · Ecology and Evolution · 266 citations
Abstract Many studies have assessed the impact of different pollutants on amphibians across a variety of experimental venues (laboratory, mesocosm, and enclosure conditions). Past reviews, using vo...
Reading Guide
Foundational Papers
Start with Grant et al. (2006) for dendrobatid phylogeny baseline and Sodhi et al. (2008) for decline drivers framework, as they anchor clade-specific analyses. Fouquet et al. (2007) addresses richness underestimation critical for risk models.
Recent Advances
Cox et al. (2022; 378 citations) extends to reptiles for comparative tetrapod declines; Jani and Briggs (2014) details chytrid-microbiome interactions on phylogenies.
Core Methods
Bayesian phylogenetics, mtDNA barcoding, Blomberg's K for signals, ancestral state reconstruction (Pyron, 2014; Grant et al., 2006).
How PapersFlow Helps You Research Phylogenetic Analysis of Amphibian Declines
Discover & Search
PapersFlow's Research Agent uses searchPapers and citationGraph on 'phylogenetic signal amphibian declines' to map 50+ papers from Sodhi et al. (2008), revealing clusters around chytrid and ranavirus drivers. exaSearch uncovers hidden preprints on dart-poison frog declines linked to Grant et al. (2006); findSimilarPapers extends to Pyron (2014) biogeography.
Analyze & Verify
Analysis Agent applies readPaperContent to extract phylogenetic trees from Grant et al. (2006), then runPythonAnalysis with pandas to compute Blomberg's K for decline traits from Sodhi et al. (2008) data. verifyResponse via CoVe cross-checks claims against Fouquet et al. (2007); GRADE grading scores evidence strength for pathogen signals in Gray et al. (2009).
Synthesize & Write
Synthesis Agent detects gaps in ranavirus phylogeny coverage post-Gray et al. (2009), flagging contradictions between Jani and Briggs (2014) microbiome data. Writing Agent uses latexEditText and latexSyncCitations to draft decline models citing Pyron (2014), with latexCompile for figures and exportMermaid for clade diagrams.
Use Cases
"Analyze phylogenetic signal in chytrid susceptibility across anuran families."
Research Agent → searchPapers('phylogenetic signal chytrid amphibians') → Analysis Agent → runPythonAnalysis(Blomberg's K on Jani and Briggs 2014 tree data) → phylogenetic conservatism metrics with p-values.
"Generate LaTeX review of Neotropical frog decline phylogenies."
Synthesis Agent → gap detection on Fouquet et al. 2007 + Grant et al. 2006 → Writing Agent → latexEditText + latexSyncCitations(20 papers) + latexCompile → camera-ready PDF with citations.
"Find code for amphibian phylogeny simulation in decline models."
Research Agent → paperExtractUrls(Sodhi et al. 2008) → Code Discovery → paperFindGithubRepo → githubRepoInspect → R scripts for trait evolution simulation.
Automated Workflows
Deep Research workflow scans 50+ papers via citationGraph from Sodhi et al. (2008), producing structured reports on decline drivers with GRADE scores. DeepScan's 7-step chain verifies phylogenetic signals in Gray et al. (2009) ranavirus data using CoVe checkpoints and runPythonAnalysis. Theorizer generates hypotheses on microbiome-phylogeny interactions from Jani and Briggs (2014).
Frequently Asked Questions
What defines phylogenetic analysis of amphibian declines?
It uses phylogenies to test evolutionary clustering of decline risks, pathogens, and traits across clades (Sodhi et al., 2008).
What methods detect phylogenetic signals in declines?
Blomberg's K and Pagel's lambda quantify trait conservatism on trees from mtDNA and systematics (Fouquet et al., 2007; Grant et al., 2006).
What are key papers?
Grant et al. (2006; 582 citations) on dart-poison frogs; Sodhi et al. (2008; 488 citations) on drivers; Pyron (2014; 346 citations) on biogeography.
What open problems exist?
Incomplete phylogenies for cryptic species and dynamic pathogen evolution need integration with real-time IUCN data (Fouquet et al., 2007).
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Part of the Amphibian and Reptile Biology Research Guide