Hydrologic evolution of the Edwards Aquifer recharge zone (Balcones fault zone) as recorded in the DNA of eyeless Cicurina cave spiders, south-central Texas

White, Kemble; Davidson, Gregg R.; Paquin, Pierre

doi:10.1130/g25373a.1

Cited by 16 publications

(20 citation statements)

References 11 publications

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“…Similar radiations are known for Cicurina spiders (Paquin and Dupérré 2009; Paquin and Hedin 2004) and Texella harvestmen (Ubick and Briggs 1992, 2004) both of which show similar biogeographic patterns and affinity for caves. Recent work has shown that the diversification patterns of Cicurina is correlated with the complex faulting in the region (White et al 2009) and may serve as a general model to explain the diversity of the Texas cave fauna. On-going work has been directed at synthesizing the distributions for multiple cave invertebrates in order to develop a comprehensive understanding of the Texas fauna (Reddell et al in prep.…”

Section: Discussionmentioning

confidence: 99%

Systematics, conservation and morphology of the spider genus Tayshaneta (Araneae, Leptonetidae) in Central Texas Caves

Ledford¹,

Paquin²,

Cokendolpher³

et al. 2012

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The spider genus Tayshaneta is revised based on results from a three gene phylogenetic analysis (Ledford et al. 2011) and a comprehensive morphological survey using scanning electron (SEM) and compound light microscopy. The morphology and relationships within Tayshaneta are discussed and five species-groups are supported by phylogenetic analyses: the anopica group, the coeca group, the myopica group, the microps group and the sandersi group. Short branch lengths within Tayshaneta contrast sharply with the remaining North American genera and are viewed as evidence for a relatively recent radiation of species. Variation in troglomorphic morphology is discussed and compared to patterns found in other Texas cave invertebrates. Several species previously known as single cave endemics have wider ranges than expected, suggesting that some caves are not isolated habitats but instead form part of interconnected karst networks. Distribution maps are compared with karst faunal regions (KFR’s) in Central Texas and the implications for the conservation and recovery of Tayshaneta species are discussed. Ten new species are described: Tayshaneta archambaulti sp. n., Tayshaneta emeraldae sp. n., Tayshaneta fawcetti sp. n., Tayshaneta grubbsi sp. n., Tayshaneta madla sp. n., Tayshaneta oconnorae sp. n., Tayshaneta sandersi sp. n., Tayshaneta sprousei sp. n., Tayshaneta vidrio sp. n. and Tayshaneta whitei sp. n. The males for three species, Tayshaneta anopica (Gertsch, 1974), Tayshaneta devia (Gertsch, 1974) and Tayshaneta microps (Gertsch, 1974) are described for the first time. Tayshaneta furtiva (Gertsch, 1974) and Tayshaneta uvaldea (Gertsch, 1974) are declared nomina dubia as the female holotypes are not diagnosable and efforts to locate specimens at the type localities were unsuccessful. All Tayshaneta species are thoroughly illustrated, diagnosed and keyed. Distribution maps are also provided highlighting areas of taxonomic ambiguity in need of additional sampling.

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Section: Discussionmentioning

confidence: 99%

Systematics, conservation and morphology of the spider genus Tayshaneta (Araneae, Leptonetidae) in Central Texas Caves

Ledford¹,

Paquin²,

Cokendolpher³

et al. 2012

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“…Constraints of space prescribe a detailed summary of similar research along steep topography in New Zealand's Southern Alps, which exploited the phylogeographic records in galaxiid fishes to reconstruct finer-scaled details of landform evolution Craw et al, 2008). Yet another example exploited the tight ecological stenotopy of cave-dwelling spiders in a karstic landscape, to reconstruct when principal episodes of tectonics uplifted the southeast margin of North America (White et al, 2009). …”

Section: Tracking Formative Events Along the Plateau's Edgementioning

confidence: 98%

Geoecodynamics and the Kalahari Epeirogeny: Linking Its Genomic Record, Tree of Life and Palimpsest Into a Unified Narrative of Landscape Evolution

Cotterill¹,

Wit

2011

South African Journal of Geology

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Geoecodynamics integrates relevant concepts and knowledge from the earth and life sciences into a cross-disciplinary synthesis. Within the encompassing framework of earth system science, the concepts and methods of (palaeo-)geoecodynamics are obtained from biogeography, geomorphology, genomics, structural geology, tectonics, geochronology, sedimentology, palaeoecology and evolutionary biology. The analytical strengths of this cross-disciplinary science are enabled by phylogeography and ecology. Positioning the earth and life sciences in a novel association to study life as an earth surface process, geoecodynamics deciphers details of biodiversity dynamics to resolve tenures of landforms. Explorations of the genomic record of earth history forms the epistemic core of geoecodynamics, and quantifying species' tenures in dynamic landscapes hold the keys to unravelling hitherto unobtainable details of landscape evolution. The metaphor of a palimpsest emphasizes that landscapes preserve complex archives of landform dynamics, and that these previously untapped repositories of evolutionary history can now be deciphered. Here, interrogations of the genomic record are structured in a palaeoecological framework to quantify interlinked tenures of species; their archives of DNA variation constitute this evidence for landform dynamics preserved in the palimpsest. The concept of the phylogeographic record defines how a unique envelope of genomic variation can reveal when formative (e.g. tectonic) events shaped the interrelated tenures of a landform and its associated species. It is especially the phylogeographic records of ecological specialists (stenotopic species) that preserve coevolutionary signatures, which, constrained by molecular clocks, reveal where and when formative events modified the palimpsest. We show, by way of an example from the central Kalahari Plateau, that geoecodynamics can quantify, with tight fidelity and a precision as low as 0.1 kyr, how the tempo and mode of landscape dynamics has interacted with earth's systems, through linking phylogeographic records of mammals and fishes to decipher subtle tectonic events in the Kalahari epeirogeny. Pursuing these insights to their obvious conclusion, geoecodynamics allows deep probing into the solid earth to connect the tempo and mode of landscape evolution with mantle convection.

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“…Karstification of the Edwards Plateau began at least 6 MYA within faulted and down‐dipping Cretaceous limestone along the margin of the Gulf of Mexico sedimentary basin (White et al. ). As aquifers evolve downward within Cretaceous‐age limestone (Deike , White et al.…”

Section: Introductionmentioning

confidence: 99%

“…As aquifers evolve downward within Cretaceous‐age limestone (Deike , White et al. ), surface streams and rivers continuously erode and intercept confining layers of the aquifer, forming and later bypassing artesian springs (Woodruff and Abbott , Grimshaw and Woodruff ). Consequently, artesian springs in arid and semi‐arid regions of the Edwards Plateau provide perennial flows that are moderately decoupled from local precipitation and recharge events but not completely.…”

Section: Introductionmentioning

confidence: 99%

Relationships among spring flow, habitats, and fishes within evolutionary refugia of the Edwards Plateau

et al. 2016

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Aquifers and spring complexes within the arid and semi‐arid karst Edwards Plateau region of Texas are evolutionary refugia supporting a large number of endemic flora and fauna. Spring fishes, many of which are endemic, are associated with the spring complexes, whereas river fishes generally avoid spring complexes. Purposes of this study were to experimentally test affinities of spring fishes and river fishes for spring complexes and rivers among six independent spring‐river systems of the Edwards Plateau and to quantitate relationship among spring fishes, river fishes and spring flow magnitude within spring complexes. We found that spring fishes did not exclusively use spring complexes but were more abundant in spring complexes than rivers and that species richness, relative abundance, and density of spring fishes were directly related to spring flow magnitude. Patterns in affinities for river fishes were less distinct. Quantitation of fish–habitat relationships will assist efforts in conserving aquatic resources within the Edwards Plateau and provides predictive models to assess biological integrity of other spring complexes. In addition, consistency in distributional patterns of spring and river fishes provides a framework for testing underlying processes of species segregation and diversification, establishes boundaries of aquatic evolutionary refugia, and expands the value of evolutionary refugia from historical refugia to contemporary and future refugia for Edwards Plateau aquatic biota.

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Hydrologic evolution of the Edwards Aquifer recharge zone (Balcones fault zone) as recorded in the DNA of eyeless Cicurina cave spiders, south-central Texas

Cited by 16 publications

References 11 publications

Systematics, conservation and morphology of the spider genus Tayshaneta (Araneae, Leptonetidae) in Central Texas Caves

Systematics, conservation and morphology of the spider genus Tayshaneta (Araneae, Leptonetidae) in Central Texas Caves

Geoecodynamics and the Kalahari Epeirogeny: Linking Its Genomic Record, Tree of Life and Palimpsest Into a Unified Narrative of Landscape Evolution

Relationships among spring flow, habitats, and fishes within evolutionary refugia of the Edwards Plateau

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