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Madyarova E, Shirokova Y, Gurkov A, Drozdova P, Baduev B, Lubyaga Y, Shatilina Z, Vishnevskaya M, Timofeyev M. Metabolic Tolerance to Atmospheric Pressure of Two Freshwater Endemic Amphipods Mostly Inhabiting the Deep-Water Zone of the Ancient Lake Baikal. INSECTS 2022; 13:insects13070578. [PMID: 35886754 PMCID: PMC9325015 DOI: 10.3390/insects13070578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/18/2022] [Accepted: 06/22/2022] [Indexed: 12/03/2022]
Abstract
Simple Summary Deep-water habitats are the largest ecosystem on the planet: over half of the Earth’s surface is covered with a water layer deeper than 200 m and remains poorly explored. Lake Baikal is the only freshwater body inhabited by animals adapted to the deep-water zone independently from their marine counterparts. Comparing these convergently evolved freshwater and marine animals is invaluable for revealing the basic mechanisms of adaptation to high hydrostatic pressure. However, laboratory experiments on deep-water organisms still usually require lifting them to the water’s surface and exposing them to potentially hazardous decompression, while endemics from Lake Baikal are poorly studied in this regard. Here, we compared metabolic reactions to such pressure decreases in two Baikal deep-water amphipods (shrimp-like crustaceans) from the genus Ommatogammarus: one species is known to tolerate pressures close to atmospheric levels, while the second was only observed at the pressures from 5 atm and above. We expected that the energy metabolism of the shallower-dwelling species would function better under the atmospheric pressure but found no substantial differences. Thus, despite some difference in long-term survival at atmospheric pressure, both species are suitable for laboratory studies as freshwater model objects adapted to large pressure variations. Abstract Lake Baikal is the only freshwater reservoir inhabited by deep-water fauna, which originated mostly from shallow-water ancestors. Ommatogammarus flavus and O. albinus are endemic scavenger amphipods (Amphipoda, Crustacea) dwelling in wide depth ranges of the lake covering over 1300 m. O. flavus had been previously collected close to the surface, while O. albinus has never been found above the depth of 47 m. Since O. albinus is a promising model species for various research, here we tested whether O. albinus is less metabolically adapted to atmospheric pressure than O. flavus. We analyzed a number of energy-related traits (contents of glucose, glycogen and adenylates, as well as lactate dehydrogenase activity) and oxidative stress markers (activities of antioxidant enzymes and levels of lipid peroxidation products) after sampling from different depths and after both species’ acclimation to atmospheric pressure. The analyses were repeated in two independent sampling campaigns. We found no consistent signs of metabolic disturbances or oxidative stress in both species right after lifting. Despite O. flavus surviving slightly better in laboratory conditions, during long-term acclimation, both species showed comparable reactions without critical changes. Thus, the obtained data favor using O. albinus along with O. flavus for physiological research under laboratory conditions.
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Affiliation(s)
- Ekaterina Madyarova
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
| | - Yulia Shirokova
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
| | - Anton Gurkov
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
- Baikal Research Centre, 664011 Irkutsk, Russia
| | - Polina Drozdova
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
- Baikal Research Centre, 664011 Irkutsk, Russia
| | - Boris Baduev
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
| | - Yulia Lubyaga
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
| | - Zhanna Shatilina
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
- Baikal Research Centre, 664011 Irkutsk, Russia
| | - Maria Vishnevskaya
- Research Resource Center “Chromas”, Saint-Petersburg State University, 198504 Saint Petersburg, Russia;
| | - Maxim Timofeyev
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia; (E.M.); (Y.S.); (A.G.); (P.D.); (B.B.); (Y.L.); (Z.S.)
- Correspondence:
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Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota). ORG DIVERS EVOL 2021; 21:691-717. [PMID: 34658667 PMCID: PMC8510888 DOI: 10.1007/s13127-021-00509-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 08/05/2021] [Indexed: 10/31/2022]
Abstract
In the deep sea, the phylogeny and biogeography of only a few taxa have been well studied. Although more than 200 species in 32 genera have been described for the asellote isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 from all ocean basins, their phylogenetic relationships are not completely understood. There is little doubt about the close relationship of these families, but the taxonomic position of a number of genera is so far unknown. Based on a combined morphological phylogeny using the Hennigian method with a dataset of 107 described species and a molecular phylogeny based on three markers (COI, 16S, and 18S) with 75 species (most new to science), we could separate Desmosomatidae and Nannoniscidae as separate families. However, we could not support the concept of the subfamilies Eugerdellatinae Hessler, 1970 and Desmosomatinae Hessler, 1970. Most genera of both families were well supported, but several genera appear as para- or even polyphyletic. Within both families, convergent evolution and analogies caused difficulty in defining apomorphies for phylogenetic reconstructions and this is reflected in the results of the concatenated molecular tree. There is no biogeographic pattern in the distribution as the genera occur over the entire Atlantic and Pacific Ocean, showing no specific phylogeographical pattern. Poor resolution at deep desmosomatid nodes may reflect the long evolutionary history of the family and rapid evolutionary radiations. Supplementary Information The online version contains supplementary material available at 10.1007/s13127-021-00509-9.
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Jabłońska A, Navarro N, Laffont R, Wattier R, Pešić V, Zawal A, Vukić J, Grabowski M. An integrative approach challenges species hypotheses and provides hints for evolutionary history of two Mediterranean freshwater palaemonid shrimps (Decapoda: Caridea). THE EUROPEAN ZOOLOGICAL JOURNAL 2021. [DOI: 10.1080/24750263.2021.1953624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- A. Jabłońska
- Department of Invertebrate Zoology and Hydrobiology, University of Lodz, Łódź, Poland
| | - N. Navarro
- EPHE, PSL University, Paris, France
- Biogéosciences, UMR 6282, CNRS, University of Burgundy, Dijon, France
| | - R. Laffont
- Biogéosciences, UMR 6282, CNRS, University of Burgundy, Dijon, France
| | - R. Wattier
- Biogéosciences, UMR 6282, CNRS, University of Burgundy, Dijon, France
| | - V. Pešić
- Department of Biology, University of Montenegro, Podgorica, Montenegro
| | - A. Zawal
- Department of Invertebrate Zoology and Limnology, Center of Molecular Biology and Biotechnology, University of Szczecin, Szczecin, Poland
| | - J. Vukić
- Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - M. Grabowski
- Department of Invertebrate Zoology and Hydrobiology, University of Lodz, Łódź, Poland
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Abstract
Adaptive radiations are bursts of evolutionary species diversification that have contributed to much of the species diversity on Earth. An exception is modern Europe, where descendants of ancient adaptive radiations went extinct, and extant adaptive radiations are small, recent and narrowly confined. However, not all legacy of old radiations has been lost. Subterranean environments, which are dark and food-deprived, yet buffered from climate change, have preserved ancient lineages. Here we provide evidence of an entirely subterranean adaptive radiation of the amphipod genus Niphargus, counting hundreds of species. Our modelling of lineage diversification and evolution of morphological and ecological traits using a time-calibrated multilocus phylogeny suggests a major adaptive radiation, comprised of multiple subordinate adaptive radiations. Their spatio-temporal origin coincides with the uplift of carbonate massifs in South-Eastern Europe 15 million years ago. Emerging subterranean environments likely provided unoccupied, predator-free space, constituting ecological opportunity, a key trigger of adaptive radiation. This discovery sheds new light on the biodiversity of Europe.
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Soldatenko EV. Morphology of the mouthparts and digestive system in two species of Uristidae Hurley, 1963 (Amphipoda: Lysianassoidea). J NAT HIST 2021. [DOI: 10.1080/00222933.2021.1906458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Walters AD, Cannizzaro AG, Trujillo DA, Berg DJ. Addressing the Linnean shortfall in a cryptic species complex. Zool J Linn Soc 2020. [DOI: 10.1093/zoolinnean/zlaa099] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Biodiversity is being lost at an alarming rate, but the rate of this loss is likely to be underestimated as a result of a deficit in taxonomic knowledge (i.e. the Linnean shortfall). This knowledge gap is more extensive for morphologically indistinct taxa. The advancement of molecular techniques and delimitation methods has facilitated the identification of such cryptic species, but a majority of these taxa remain undescribed. To investigate the effects of taxonomic uncertainty on understanding of biodiversity, we applied the general lineage concept of species to an amphipod species complex, the Gammaruslacustris lineage that occupies springs of the northern Chihuahuan Desert, which is emerging in contemporary times. We investigated species boundaries using a validation-based approach and examined genetic structure of the lineage using a suite of microsatellite markers to identify independently evolving metapopulations. Our results show that each spring contains a genetically distinct population that is geographically isolated from other springs, suggesting evolutionary independence and status as separate species. Additionally, we observed subtle interspecific morphological variation among the putative species. We used multiple lines of evidence to formally describe four new species (Gammarus langi sp. nov., G. percalacustris sp. nov., G. colei sp. nov. and G. malpaisensis sp. nov.) endemic to the northern Chihuahuan Desert. Cryptic speciation is likely to be high in other aquatic taxa within these ecosystems, and across arid landscapes throughout North America and elsewhere, suggesting that the magnitude of the Linnean shortfall is currently underestimated in desert springs worldwide.
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Affiliation(s)
| | | | | | - David J Berg
- Department of Biology, Miami University, Hamilton, OH USA
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Weston JNJ, Peart RA, Jamieson AJ. Amphipods from the Wallaby-Zenith Fracture Zone, Indian Ocean: new genus and two new species identified by integrative taxonomy. SYST BIODIVERS 2020. [DOI: 10.1080/14772000.2020.1729891] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Johanna N. J. Weston
- School of Natural and Environmental Sciences, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
| | - Rachael A. Peart
- National Institute of Water & Atmospheric Research (NIWA), 301 Evans Bay Parade, Wellington, 6021, New Zealand
| | - Alan J. Jamieson
- School of Natural and Environmental Sciences, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
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Copilaş-Ciocianu D, Borko Š, Fišer C. The late blooming amphipods: Global change promoted post-Jurassic ecological radiation despite Palaeozoic origin. Mol Phylogenet Evol 2020; 143:106664. [DOI: 10.1016/j.ympev.2019.106664] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 10/19/2019] [Accepted: 10/24/2019] [Indexed: 01/04/2023]
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Li JY, Song ZL, Yan GY, He LS. The complete mitochondrial genome of the largest amphipod, Alicella gigantea: Insight into its phylogenetic relationships and deep sea adaptive characters. Int J Biol Macromol 2019; 141:570-577. [PMID: 31505211 DOI: 10.1016/j.ijbiomac.2019.09.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 08/23/2019] [Accepted: 09/06/2019] [Indexed: 10/26/2022]
Abstract
Alicella gigantea (Alicelloidae) is a scavenger with the largest body size among amphipods. It is a participant in the foodweb of deepsea ecosystem and distributed with vast bathymetric and geographic ranges. In this study, the mitochondrial genome of A. gigantea was completely assembled and characterized. The complete sequence has a total length of 16,851 bp, comprising the usual eukaryotic components, with 13 protein-coding genes (PCGs), 2 ribosomal RNA genes (rRNAs), 22 transfer RNA genes (tRNAs), and 2 noncoding control regions (CRs). The gene rearrangement and reverse nucleotide strand bias of its mitochondrial genome are similar to those observed in the deepsea amphipod Eurythenes maldoror (Eurytheneidae), but different from the characters of Halice sp. MT-2017 (Dexaminoidea), an inhabitant of a deeper environment. Phylogenetic analysis indicates that A. gigantea occupies the basal branch of deepsea species-E. maldoror and Hirondellea gigas. This phylogeny supports the hypothesis that the evolution of hadal amphipods has undergone a transition from the abyssal depth. Compared to 41 available shallow water equivalents, the four accessible mitochondrial genomes from the deep sea, including the one produced in this study, show significantly fewer charged amino acids in the 13 PCGs, which suggests an adaption to the deepsea environment.
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Affiliation(s)
- Jun-Yuan Li
- Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan 572000, PR China
| | - Zeng-Lei Song
- Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan 572000, PR China
| | - Guo-Yong Yan
- Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan 572000, PR China
| | - Li-Sheng He
- Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, Hainan 572000, PR China.
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Renz J, Markhaseva EL, Laakmann S. The phylogeny of Ryocalanoidea (Copepoda, Calanoida) based on morphology and a multi-gene analysis with a description of new ryocalanoidean species. Zool J Linn Soc 2018. [DOI: 10.1093/zoolinnean/zly069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Two new species of ryocalanoid copepods (Crustacea: Calanoida), Ryocalanus squamatus sp. nov. and Yrocalanus kurilensis sp. nov. are described together with a female of Ryocalanus infelix Tanaka, 1956, type species for the genus Ryocalanus Tanaka, 1956, from abyssal depths in the Kurile-Kamchatka trench. The new species can be assigned to the superfamily Ryocalanoidea based on the segmentation and armature of the swimming legs and the modification of the male right antennule. A new interpretation of the fusions of segments in the male right antennule of Ryocalanus shows the marked differences between the ryocalanoidean genera. The status of Ryocalanoidea within the Calanoida is discussed based on morphology and a first molecular multi-gene analysis with cytochrome oxidase subunit I, cytochrome b, nuclear ribosomal 18S and 28S rDNA and internal transcribed spacer 2. This analysis supports the close interrelationship between Ryocalanoidea and Spinocalanoidea. The monophyletic status of Ryocalanoidea could not be retrieved in the phylogenetic analysis, as specimens of Yrocalanus formed a clade within Spinocalanoidea. The inconclusive results between morphological and molecular analyses are discussed with a proposition to keep the current system until more males of taxa belonging to the Spinocalanoidea are discovered, as the male antennule plays a crucial role in the interpretation of relationships between Ryocalanoidea and Spinocalanoidea.
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Affiliation(s)
- Jasmin Renz
- German Centre for Marine Biodiversity Research (DZMB), Senckenberg am Meer, Hamburg, Germany
| | - Elena L Markhaseva
- Laboratory of Marine Research, Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia
| | - Silke Laakmann
- German Centre for Marine Biodiversity Research (DZMB), Senckenberg am Meer, Wilhelmshaven, Germany
- Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Oldenburg, Germany
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Fišer C, Robinson CT, Malard F. Cryptic species as a window into the paradigm shift of the species concept. Mol Ecol 2018; 27:613-635. [DOI: 10.1111/mec.14486] [Citation(s) in RCA: 263] [Impact Index Per Article: 43.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 12/12/2017] [Accepted: 12/13/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Cene Fišer
- SubBio Lab; Department of Biology; Biotechnical Faculty; University of Ljubljana; Ljubljana Slovenia
| | - Christopher T. Robinson
- Department of Aquatic Ecology; Eawag; Dübendorf Switzerland
- Institute of Integrative Biology; ETH Zürich; Zürich Switzerland
| | - Florian Malard
- Université Lyon; Université Claude Bernard Lyon 1; CNRS; ENTPE; UMR5023 LEHNA Villeurbanne France
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Chenuil A, Saucède T, Hemery LG, Eléaume M, Féral JP, Améziane N, David B, Lecointre G, Havermans C. Understanding processes at the origin of species flocks with a focus on the marine Antarctic fauna. Biol Rev Camb Philos Soc 2017; 93:481-504. [DOI: 10.1111/brv.12354] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 06/20/2017] [Accepted: 06/27/2017] [Indexed: 01/29/2023]
Affiliation(s)
- Anne Chenuil
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE-UMR7263); Aix-Marseille Univ, Univ Avignon, CNRS, IRD, Station Marine d'Endoume, Chemin de la Batterie des Lions; F-13007 Marseille France
| | - Thomas Saucède
- UMR6282 Biogéosciences; CNRS - Université de Bourgogne Franche-Comté, 6 boulevard Gabriel; F-21000 Dijon France
| | - Lenaïg G. Hemery
- DMPA, UMR 7208 BOREA/MNHN/CNRS/Paris VI/ Univ Caen, 57 rue Cuvier; 75231 Paris Cedex 05 France
| | - Marc Eléaume
- UMR7205 Institut de Systématique; Evolution et Biodiversité, CNRS-MNHN-UPMC-EPHE, CP 24, Muséum national d'Histoire naturelle, 57 rue Cuvier; 75005 Paris France
| | - Jean-Pierre Féral
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE-UMR7263); Aix-Marseille Univ, Univ Avignon, CNRS, IRD, Station Marine d'Endoume, Chemin de la Batterie des Lions; F-13007 Marseille France
| | - Nadia Améziane
- UMR7205 Institut de Systématique; Evolution et Biodiversité, CNRS-MNHN-UPMC-EPHE, CP 24, Muséum national d'Histoire naturelle, 57 rue Cuvier; 75005 Paris France
| | - Bruno David
- UMR6282 Biogéosciences; CNRS - Université de Bourgogne Franche-Comté, 6 boulevard Gabriel; F-21000 Dijon France
- Muséum national d'Histoire naturelle, 57 rue Cuvier; 75005 Paris France
| | - Guillaume Lecointre
- UMR7205 Institut de Systématique; Evolution et Biodiversité, CNRS-MNHN-UPMC-EPHE, CP 24, Muséum national d'Histoire naturelle, 57 rue Cuvier; 75005 Paris France
| | - Charlotte Havermans
- Marine Zoology, Bremen Marine Ecology (BreMarE); University of Bremen, PO Box 330440; 28334 Bremen Germany
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12; D-27570 Bremerhaven Germany
- OD Natural Environment; Royal Belgian Institute of Natural Sciences, Rue Vautier 29; B-1000 Brussels Belgium
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Christman MC, Doctor DH, Niemiller ML, Weary DJ, Young JA, Zigler KS, Culver DC. Predicting the Occurrence of Cave-Inhabiting Fauna Based on Features of the Earth Surface Environment. PLoS One 2016; 11:e0160408. [PMID: 27532611 PMCID: PMC4988700 DOI: 10.1371/journal.pone.0160408] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Accepted: 07/08/2016] [Indexed: 12/03/2022] Open
Abstract
One of the most challenging fauna to study in situ is the obligate cave fauna because of the difficulty of sampling. Cave-limited species display patchy and restricted distributions, but it is often unclear whether the observed distribution is a sampling artifact or a true restriction in range. Further, the drivers of the distribution could be local environmental conditions, such as cave humidity, or they could be associated with surface features that are surrogates for cave conditions. If surface features can be used to predict the distribution of important cave taxa, then conservation management is more easily obtained. We examined the hypothesis that the presence of major faunal groups of cave obligate species could be predicted based on features of the earth surface. Georeferenced records of cave obligate amphipods, crayfish, fish, isopods, beetles, millipedes, pseudoscorpions, spiders, and springtails within the area of Appalachian Landscape Conservation Cooperative in the eastern United States (Illinois to Virginia and New York to Alabama) were assigned to 20 x 20 km grid cells. Habitat suitability for these faunal groups was modeled using logistic regression with twenty predictor variables within each grid cell, such as percent karst, soil features, temperature, precipitation, and elevation. Models successfully predicted the presence of a group greater than 65% of the time (mean = 88%) for the presence of single grid cell endemics, and for all faunal groups except pseudoscorpions. The most common predictor variables were latitude, percent karst, and the standard deviation of the Topographic Position Index (TPI), a measure of landscape rugosity within each grid cell. The overall success of these models points to a number of important connections between the surface and cave environments, and some of these, especially soil features and topographic variability, suggest new research directions. These models should prove to be useful tools in predicting the presence of species in understudied areas.
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Affiliation(s)
- Mary C. Christman
- Departments of Biology and of Statistics, University of Florida, Gainesville, Florida, and MCC Statistical Consulting LLC, Gainesville, Florida, United States of America
| | - Daniel H. Doctor
- U. S. Geological Survey, Reston, Virginia, United States of America
| | - Matthew L. Niemiller
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, Champaign, Illinois, United States of America
| | - David J. Weary
- U. S. Geological Survey, Reston, Virginia, United States of America
| | - John A. Young
- U. S. Geological Survey, Leetown Science Center, Kearneysville, West Virginia, United States of America
| | - Kirk S. Zigler
- Department of Biology, The University of the South, Sewanee, Tennessee, United States of America
| | - David C. Culver
- Department of Environmental Science, American University, Washington, District of Columbia, United States of America
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Niemiller ML, Taylor SJ. Biogeography and conservation assessment of Bactrurus groundwater amphipods (Crangonyctidae) in the central and eastern United States. SUBTERRANEAN BIOLOGY 2016. [DOI: 10.3897/subtbiol.17.7298] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Verheye ML, Martin P, Backeljau T, D'Udekem D'Acoz C. DNA analyses reveal abundant homoplasy in taxonomically important morphological characters of Eusiroidea (Crustacea, Amphipoda). ZOOL SCR 2015. [DOI: 10.1111/zsc.12153] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Marie L. Verheye
- OD Taxonomy and Phylogeny; Royal Belgian Institute of Natural Sciences; rue Vautier 29 B-1000 Brussels Belgium
| | - Patrick Martin
- OD Taxonomy and Phylogeny; Royal Belgian Institute of Natural Sciences; rue Vautier 29 B-1000 Brussels Belgium
| | - Thierry Backeljau
- OD Taxonomy and Phylogeny; Royal Belgian Institute of Natural Sciences; rue Vautier 29 B-1000 Brussels Belgium
| | - Cédric D'Udekem D'Acoz
- OD Taxonomy and Phylogeny; Royal Belgian Institute of Natural Sciences; rue Vautier 29 B-1000 Brussels Belgium
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Eilertsen MH, Malaquias MAE. Speciation in the dark: diversification and biogeography of the deep-sea gastropod genus Scaphander in the Atlantic Ocean. JOURNAL OF BIOGEOGRAPHY 2015; 42:843-855. [PMID: 27524853 PMCID: PMC4964956 DOI: 10.1111/jbi.12471] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
AIM The aim of this work was to improve understanding about the mode, geography and tempo of diversification in deep-sea organisms, using a time-calibrated molecular phylogeny of the heterobranch gastropod genus Scaphander. LOCATION Atlantic and Indo-West Pacific (IWP) oceans. METHODS Two mitochondrial gene markers (COI and 16S) and one nuclear ribosomal gene (28S) from six Atlantic species of Scaphander, and four IWP species were used to generate a multilocus phylogenetic hypothesis using uncorrelated relaxed-clock Bayesian methods implemented in beast and calibrated with the first occurrence of Scaphander in the fossil record (58.7-55.8 Ma). RESULTS Two main clades were supported: clade A, with sister relationships between species and subclades from the Atlantic and IWP; and clade B, with two western Atlantic sister species. Our estimates indicate that the two earliest divergences in clade A occurred between the middle Eocene and late Miocene and the most recent speciation occurred within the middle Miocene to Pleistocene. The divergence between the two western Atlantic species in clade B was estimated at late Oligocene-Pliocene. MAIN CONCLUSIONS The prevailing mode of speciation in Scaphander was allopatric, but one possible case of sympatric speciation was detected between two western Atlantic species. Sister relationships between IWP and Atlantic lineages suggest the occurrence both of vicariance events caused by the closure of the Tethyan Seaway and of dispersal between the two ocean basins, probably around South Africa during episodic disruptions of the deep-sea regional current system caused by glacial-interglacial cycles. Cladogenetic estimates do not support comparatively older diversification of deep-sea faunas, but corroborate the hypothesis of a pulse of diversification centred in the Oligocene and Miocene epochs. Amphi-Atlantic species were found to occur at deeper depths (bathyal-abyssal) and we hypothesize that trans-Atlantic connectivity is maintained by dispersal between neighbouring reproductive populations inhabiting the abyssal sea floor and by dispersal across the shelf and slope of Arctic and sub-Arctic regions.
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Affiliation(s)
- Mari H. Eilertsen
- Marine Biodiversity Research GroupDepartment of BiologyUniversity of Bergen5006BergenNorway
| | - Manuel António E. Malaquias
- Phylogenetic Systematics and Evolution Research GroupDepartment of Natural HistoryUniversity Museum of BergenUniversity of Bergen5020BergenNorway
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