DOCSLIB.ORG

Ephemeral Pleistocene Woodlands Connect the Dots for Highland Rattlesnakes of the Crotalus Intermedius Group

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Ephemeral Pleistocene Woodlands Connect the Dots for Highland Rattlesnakes of the Crotalus Intermedius Group Journal of Biogeography (J. Biogeogr.) (2011) ORIGINAL Ephemeral Pleistocene woodlands ARTICLE connect the dots for highland rattlesnakes of the Crotalus intermedius group Robert W. Bryson Jr1*, Robert W. Murphy2,3, Matthew R. Graham1, Amy Lathrop2 and David Lazcano4 1School of Life Sciences, University of Nevada, ABSTRACT Las Vegas, 4505 Maryland Parkway, Las Aim To test how Pleistocene climatic changes affected diversification of the Vegas, NV 89154-4004, USA, 2Centre for Biodiversity and Conservation Biology, Royal Crotalus intermedius species complex. Ontario Museum, Toronto, ON M5S 2C6, Location Highlands of Mexico and the south-western United States (Arizona). Canada, 3State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Methods We synthesize the matrilineal genealogy based on 2406 base pairs of Zoology, The Chinese Academy of Sciences, mitochondrial DNA sequences, fossil-calibrated molecular dating, reconstruction Kunming 650223, China, 4Laboratorio de of ancestral geographic ranges, and climate-based modelling of species Herpetologı´a, Universidad Auto´noma de distributions to evaluate the history of female dispersion. Nuevo Leo´n, San Nicolas de los Garza, Nuevo Results The presently fragmented distribution of the C. intermedius group is the Leo´n CP 66440, Mexico result of both Neogene vicariance and Pleistocene pine–oak habitat fragmentation. Most lineages appear to have a Quaternary origin. The Sierra Madre del Sur and northern Sierra Madre Oriental are likely to have been colonized during this time. Species distribution models for the Last Glacial Maximum predict expansions of suitable habitat for taxa in the southern Sierra Madre Occidental and northern Sierra Madre Oriental. Main conclusions Lineage diversification in the C. intermedius group is a consequence of Pleistocene climate cycling. Distribution models for two sister taxa in the northern and southern Sierra Madre Occidental and northern Sierra Madre Oriental during the Last Glacial Maximum provide evidence for the expansion of pine–oak habitat across the Central Mexican Plateau. Downward displacement and subsequent expansions of highland vegetation across Mexico during cooler glacial cycles may have allowed dispersal between highlands, which resulted in contact between previously isolated taxa and the colonization of new *Correspondence: Robert W. Bryson Jr, School habitats. of Life Sciences, University of Nevada, Las Keywords Vegas, 4505 Maryland Parkway, Las Vegas, NV 89154-4004, USA. Ancestral area reconstruction, Crotalus intermedius, divergence dating, Mexico, E-mail: [email protected] niche modelling, phylogeography, Quaternary, rattlesnakes. del Sur (SMS) in central and southern Mexico. The highland INTRODUCTION biotas on each range are isolated by intervening dry lowlands. The Mexican highlands, which encompass a complex assem- Most notably, the highlands of the northern Sierra Madres are blage of montane biotas characterized by high endemism and separated by hundreds of kilometres of xeric habitat formed by diversity (Ramamoorthy et al., 1993; Campbell, 1999), are one the Chihuahuan Desert and Central Mexican Plateau. of Earth’s biodiversity hotspots (Mittermeier et al., 2005). They Although few data detail climatic shifts in Mexico during the consist of four major mountain ranges predominantly covered Pleistocene (see Metcalfe et al., 2000), available evidence by mixed pine–oak (Pinus–Quercus) woodlands, namely the suggests that conditions across northern and central Mexico north–south-trending Sierra Madre Occidental (SMOc) and were wetter and cooler during the Last Glacial Maximum Sierra Madre Oriental (SMOr) of northern Mexico, and the (LGM) than they are now. McDonald (1993) reports a east–west-trending Transvolcanic Belt (TVB) and Sierra Madre downward displacement of montane vegetation of at least ª 2011 Blackwell Publishing Ltd http://wileyonlinelibrary.com/journal/jbi 1 doi:10.1111/j.1365-2699.2011.02565.x R. W. Bryson Jr et al. 1000 m during glacial times. This displacement may have approach is controversial (e.g. Edwards & Bensch, 2009), yet united highland biotas via pine–oak corridors across the these data can detect recent geographic patterns (Moore, 1995; Central Mexican Plateau (Baker, 1956; Martin, 1958; Duell- Hudson & Coyne, 2002; Zink & Barrowclough, 2008; Bar- man, 1965; Morafka, 1977; Schmidly, 1977; McCranie & rowclough & Zink, 2009) and lead to significant biogeographic Wilson, 1987; Fa & Morales, 1993; McDonald, 1993; Marshall discoveries (e.g. Upton & Murphy, 1997; Riddle et al., 2000). & Liebherr, 2000). During post-glacial episodes throughout the Maternal history remains an important tool for exploring the Pleistocene, montane woodlands seem to have retracted to the genetic consequences of ecological history (e.g. Wiens et al., highlands, thus isolating the associated biota (Metcalfe et al., 2007; Burney & Brumfield, 2009; Pyron & Burbrink, 2009), 2000; Anducho-Reyes et al., 2008). partly because genetic recombination and gene sorting do not The highland biotas of the northern Sierra Madres appear to occur. have had a recent connection (Marshall & Liebherr, 2000). Here, we explore the effects of Pleistocene climatic change Several dispersal corridors across central Mexico are postulated on the diversification of the highland rattlesnakes of the for the Pleistocene (Duellman, 1965; McCranie & Wilson, C. intermedius group. Montane Pleistocene corridors may have 1987; Fa & Morales, 1993; McDonald, 1993) or Pliocene facilitated contact of these rattlesnakes through dispersal. We (Morafka, 1977). The best evidence for these corridors comes model the distribution of C. pricei because this taxon currently from multiple species with closely related, disjunct, highland shows the greatest extent of geographic isolation of any species populations. These species are either absent or replaced by in the C. intermedius group. If populations were connected sister taxa in the Transvolcanic Belt. Martin (1958) notes during the last glaciation, then distribution models projected numerous taxa that fit this pattern, including pines, snails, onto Late Pleistocene climates should demonstrate habitat non-avian reptiles and mammals. However, confirmation of connectivity. these patterns using molecular data is largely lacking (see Appendix S1 in Supporting Information). Only two studies, MATERIALS AND METHODS focused on alligator lizards (Zaldivar-Rivero´n et al., 2005) and Mexican jays (McCormack et al., 2008, 2010), estimate dates of Taxon sampling and laboratory methods divergence between isolated sister taxa in the northern Sierra Madres, and both pre-date Pleistocene cycles. Thus, despite Between 1999 and 2009 we collected 60 samples that repre- being over 50 years old, the hypothesis of a Pleistocene woodland sented all taxa in the C. intermedius group from throughout corridor across central Mexico remains largely untested. their distributions (Fig. 1; Appendix S2). Sampling was con- In this study, we examine the historical diversification of the centrated along the northern Sierra Madres to maximize Crotalus intermedius species complex, a group of rattlesnakes geographic coverage of C. pricei pricei and C. pricei miquihu- endemic to the Mexican highlands. This group is closely anus. Based on recent phylogenetic analyses (Murphy et al., associated with mixed pine–oak forests above 1900 m eleva- 2002; Castoe & Parkinson, 2006; Wu¨ster et al., 2008), we used tion, and it is distributed throughout all of the major Sistrurus catenatus and S. miliarus as outgroup taxa. All mountains of Mexico (Campbell & Lamar, 2004). Crotalus handling of animals followed animal use protocols approved intermedius contains three subspecies (Campbell & Lamar, by the University of Nevada at Las Vegas Animal Care 2004) disjunctly distributed primarily in pine–oak forest above Committee (R701-1105-203). 2000 m along the southern SMOr (C. intermedius intermedius) We sequenced three regions of the mitochondrial genome, and SMS (C. intermedius gloydi and C. intermedius omiltem- namely a portion of the 12S and 16S ribosomal RNA genes, anus). Similarly, Crotalus pricei pricei is isolated above 1900 m NADH dehydrogenase subunit 4 (ND4) and its flanking in the SMOc, and Crotalus pricei miquihuanus occurs in the tRNAs, and the complete ATPase subunits 8 and 6 (ATPase 8, SMOr (Campbell & Lamar, 2004). Finally, the sister species ATPase 6), following methods specified in Bryson et al. Crotalus transversus and C. tancitarensis are distributed in (2011a). These gene regions have been shown to be informa- pine–oak and pine–fir (Pinus–Abies) forests at elevations above tive at inter- and intraspecific levels within rattlesnakes 2900 m on the TVB (Alvarado-Dı´az & Campbell, 2004; (Murphy et al., 2002; Wu¨ster et al., 2005; Bryson et al., Campbell & Lamar, 2004). These patterns offer an opportunity 2011a). Forward and reverse sequences for each individual to test hypotheses on the role of Pleistocene pine–oak were edited and manually aligned using BioEdit 5.0.9 (Hall, fragmentation in shaping patterns of genetic variation across 1999). Identical sequences for samples from the same locality the highlands of Mexico. were collapsed into one haplotype. Average uncorrected Recent methodological advances provide useful tools in the pairwise divergences between these groups (p-distances) were reconstruction of the evolutionary history of species. Mito- determined using mega 4 (Kumar et al., 2008). chondrial DNA (mtDNA) sequences can be used for fossil- calibrated
Load more

Recommended publications
  • Other Contributions
    Other Contributions NATURE NOTES Amphibia: Caudata Ambystoma ordinarium. Predation by a Black-necked Gartersnake (Thamnophis cyrtopsis). The Michoacán Stream Salamander (Ambystoma ordinarium) is a facultatively paedomorphic ambystomatid species. Paedomorphic adults and larvae are found in montane streams, while metamorphic adults are terrestrial, remaining near natal streams (Ruiz-Martínez et al., 2014). Streams inhabited by this species are immersed in pine, pine-oak, and fir for- ests in the central part of the Trans-Mexican Volcanic Belt (Luna-Vega et al., 2007). All known localities where A. ordinarium has been recorded are situated between the vicinity of Lake Patzcuaro in the north-central portion of the state of Michoacan and Tianguistenco in the western part of the state of México (Ruiz-Martínez et al., 2014). This species is considered Endangered by the IUCN (IUCN, 2015), is protected by the government of Mexico, under the category Pr (special protection) (AmphibiaWeb; accessed 1April 2016), and Wilson et al. (2013) scored it at the upper end of the medium vulnerability level. Data available on the life history and biology of A. ordinarium is restricted to the species description (Taylor, 1940), distribution (Shaffer, 1984; Anderson and Worthington, 1971), diet composition (Alvarado-Díaz et al., 2002), phylogeny (Weisrock et al., 2006) and the effect of habitat quality on diet diversity (Ruiz-Martínez et al., 2014). We did not find predation records on this species in the literature, and in this note we present information on a predation attack on an adult neotenic A. ordinarium by a Thamnophis cyrtopsis. On 13 July 2010 at 1300 h, while conducting an ecological study of A.
    [Show full text]
  • Influence of Current Climate, Historical Climate Stability and Topography on Species Richness and Endemism in Mesoamerican Geophyte Plants
    Influence of current climate, historical climate stability and topography on species richness and endemism in Mesoamerican geophyte plants Victoria Sosa* and Israel Loera* Biología Evolutiva, Instituto de Ecologia AC, Xalapa, Veracruz, Mexico * These authors contributed equally to this work. ABSTRACT Background. A number of biotic and abiotic factors have been proposed as drivers of geographic variation in species richness. As biotic elements, inter-specific interactions are the most widely recognized. Among abiotic factors, in particular for plants, climate and topographic variables as well as their historical variation have been correlated with species richness and endemism. In this study, we determine the extent to which the species richness and endemism of monocot geophyte species in Mesoamerica is predicted by current climate, historical climate stability and topography. Methods. Using approximately 2,650 occurrence points representing 507 geophyte taxa, species richness (SR) and weighted endemism (WE) were estimated at a geographic scale using grids of 0.5 × 0.5 decimal degrees resolution using Mexico as the geographic extent. SR and WE were also estimated using species distributions inferred from ecological niche modeling for species with at least five spatially unique occurrence points. Current climate, current to Last Glacial Maximum temperature, precipitation stability and topographic features were used as predictor variables on multiple spatial regression analyses (i.e., spatial autoregressive models, SAR) using the estimates of SR and WE as response variables. The standardized coefficients of the predictor variables that were significant in the regression models were utilized to understand the observed patterns of species richness and endemism. Submitted 31 May 2017 Accepted 26 September 2017 Results.
    [Show full text]
  • Diversity-Dependent Cladogenesis Throughout Western Mexico: Evolutionary Biogeography of Rattlesnakes (Viperidae: Crotalinae: Crotalus and Sistrurus)
    City University of New York (CUNY) CUNY Academic Works Publications and Research New York City College of Technology 2016 Diversity-dependent cladogenesis throughout western Mexico: Evolutionary biogeography of rattlesnakes (Viperidae: Crotalinae: Crotalus and Sistrurus) Christopher Blair CUNY New York City College of Technology Santiago Sánchez-Ramírez University of Toronto How does access to this work benefit ou?y Let us know! More information about this work at: https://academicworks.cuny.edu/ny_pubs/344 Discover additional works at: https://academicworks.cuny.edu This work is made publicly available by the City University of New York (CUNY). Contact: [email protected] 1Blair, C., Sánchez-Ramírez, S., 2016. Diversity-dependent cladogenesis throughout 2 western Mexico: Evolutionary biogeography of rattlesnakes (Viperidae: Crotalinae: 3 Crotalus and Sistrurus ). Molecular Phylogenetics and Evolution 97, 145–154. 4 https://doi.org/10.1016/j.ympev.2015.12.020. © 2016. This manuscript version is made 5 available under the CC-BY-NC-ND 4.0 license. 6 7 8 Diversity-dependent cladogenesis throughout western Mexico: evolutionary 9 biogeography of rattlesnakes (Viperidae: Crotalinae: Crotalus and Sistrurus) 10 11 12 CHRISTOPHER BLAIR1*, SANTIAGO SÁNCHEZ-RAMÍREZ2,3,4 13 14 15 1Department of Biological Sciences, New York City College of Technology, Biology PhD 16 Program, Graduate Center, The City University of New York, 300 Jay Street, Brooklyn, 17 NY 11201, USA. 18 2Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks 19 Street, Toronto, ON, M5S 3B2, Canada. 20 3Department of Natural History, Royal Ontario Museum, 100 Queen’s Park, Toronto, 21 ON, M5S 2C6, Canada. 22 4Present address: Environmental Genomics Group, Max Planck Institute for 23 Evolutionary Biology, August-Thienemann-Str.
    [Show full text]
  • Proquest Dissertations
    Ecology and conservation of the twin- spotted rattlesnake, Crotalus pricei Item Type text; Thesis-Reproduction (electronic) Authors Prival, David Benjamin Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 28/09/2021 01:08:24 Link to Item http://hdl.handle.net/10150/278752 INFORMATiON TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overiaps. Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge.
    [Show full text]
  • Bibliography and Scientific Name Index to Amphibians
    lb BIBLIOGRAPHY AND SCIENTIFIC NAME INDEX TO AMPHIBIANS AND REPTILES IN THE PUBLICATIONS OF THE BIOLOGICAL SOCIETY OF WASHINGTON BULLETIN 1-8, 1918-1988 AND PROCEEDINGS 1-100, 1882-1987 fi pp ERNEST A. LINER Houma, Louisiana SMITHSONIAN HERPETOLOGICAL INFORMATION SERVICE NO. 92 1992 SMITHSONIAN HERPETOLOGICAL INFORMATION SERVICE The SHIS series publishes and distributes translations, bibliographies, indices, and similar items judged useful to individuals interested in the biology of amphibians and reptiles, but unlikely to be published in the normal technical journals. Single copies are distributed free to interested individuals. Libraries, herpetological associations, and research laboratories are invited to exchange their publications with the Division of Amphibians and Reptiles. We wish to encourage individuals to share their bibliographies, translations, etc. with other herpetologists through the SHIS series. If you have such items please contact George Zug for instructions on preparation and submission. Contributors receive 50 free copies. Please address all requests for copies and inquiries to George Zug, Division of Amphibians and Reptiles, National Museum of Natural History, Smithsonian Institution, Washington DC 20560 USA. Please include a self-addressed mailing label with requests. INTRODUCTION The present alphabetical listing by author (s) covers all papers bearing on herpetology that have appeared in Volume 1-100, 1882-1987, of the Proceedings of the Biological Society of Washington and the four numbers of the Bulletin series concerning reference to amphibians and reptiles. From Volume 1 through 82 (in part) , the articles were issued as separates with only the volume number, page numbers and year printed on each. Articles in Volume 82 (in part) through 89 were issued with volume number, article number, page numbers and year.
    [Show full text]
  • Mapping the Literature of GIS
    Mapping the Literature of GIS Edith A. Scarletto This study analyzed citations in four journals, Annals of the Association of American Geographers, Cartography and Geographic Information Science, International Journal of Geographical Information Science, and Cartographic Journal, using Bradford’s Law of Scattering to identify three influence zones indicating core and peripheral titles in the study areas of GIS. Journals were ranked resulting in twenty-three core journals and 187 secondary journals. Scores for relevant indexing/abstracting services are also given to describe access points and coverage. The results can assist librarians and collection managers to support research in their institutions where GIS is both used and studied. cademic librarians have tra- to support research and to contribute ditionally fit emerging dis- additional knowledge to their discipline. ciplines into their existing Academic libraries support research by structure, and Geography collecting and providing access to journal and Map Librarians (among others) have literature in their institutions. The chal- integrated Geographic Information Sci- lenge of selecting journals is exacerbated ence (GIS) into their duties as quickly as as budgets shrink and is especially dif- faculty and students have adopted them. ficult for a multidisciplinary research The ARL (Association of Research Librar- area like GIS. ies) GIS Literacy Project began during the This article examines and creates a early 1990s to recognize the increasing list of the GIS journals in three ranked interest in GIS, and several SPEC KITS zones of influence using Bradford’s Law have been issued about its support includ- of Scattering.4 Analyzing citations in four ing Davie1 and Salem.2 Using a working source journals, Annals of the Association definition from the Encyclopedia of GIS, of American Geographers, Cartography and GIS is “knowledge acquired through Geographic Information Science, Interna- processing geographically referenced tional Journal of Geographical Information data.
    [Show full text]
  • Genetic Diversity and Structure of Crotalus Triseriatus, a Rattlesnake of Central Mexico
    Journal of Genetics, Vol. 97, No. 5, December 2018, pp. 1119–1130 © Indian Academy of Sciences https://doi.org/10.1007/s12041-018-1004-y RESEARCH ARTICLE Genetic diversity and structure of Crotalus triseriatus, a rattlesnake of central Mexico ARMANDO SUNNY, OCTAVIO MONROY-VILCHIS∗ and MARTHA M. ZARCO-GONZÁLEZ Centro de Investigación en Ciencias Biológicas Aplicadas, Universidad Autónoma del Estado de México, Instituto Literario # 100, Colonia Centro, Toluca, Estado de México, CP 50000, México *For correspondence. E-mail: [email protected], [email protected]. Received 27 November 2017; revised 10 March 2018; accepted 27 March 2018; published online 23 October 2018 Abstract. The isolated and fragmented populations are highly susceptible to stochastic events, increasing the extinction risk because of the decline in putative adaptive potential and individual fitness. The population has high heterozygosity values and a moderate allelic diversity, the heterozygosity values are higher than in most other Crotalus species and snake studies. Possibly these high levels of genetic diversity can be related to a large founder size, high effective population size, multiple paternity and overlapping generations. We did not find the genetic structuring but the effective number of alleles (Ne) was 138.1. We found evidence of bottlenecks and the majority of rattlesnakes were unrelated, despite the small sample size, endemic status, the isolated and fragmented habitat. The genetic information provided in this study can be useful as a first approach to try to make informed conservation efforts for this species and also, important to preserve the habitat of this species; the endangered Abies–Pinus forest of the Nevado the Toluca Volcano.
    [Show full text]
  • Xenosaurus Tzacualtipantecus. the Zacualtipán Knob-Scaled Lizard Is Endemic to the Sierra Madre Oriental of Eastern Mexico
    Xenosaurus tzacualtipantecus. The Zacualtipán knob-scaled lizard is endemic to the Sierra Madre Oriental of eastern Mexico. This medium-large lizard (female holotype measures 188 mm in total length) is known only from the vicinity of the type locality in eastern Hidalgo, at an elevation of 1,900 m in pine-oak forest, and a nearby locality at 2,000 m in northern Veracruz (Woolrich- Piña and Smith 2012). Xenosaurus tzacualtipantecus is thought to belong to the northern clade of the genus, which also contains X. newmanorum and X. platyceps (Bhullar 2011). As with its congeners, X. tzacualtipantecus is an inhabitant of crevices in limestone rocks. This species consumes beetles and lepidopteran larvae and gives birth to living young. The habitat of this lizard in the vicinity of the type locality is being deforested, and people in nearby towns have created an open garbage dump in this area. We determined its EVS as 17, in the middle of the high vulnerability category (see text for explanation), and its status by the IUCN and SEMAR- NAT presently are undetermined. This newly described endemic species is one of nine known species in the monogeneric family Xenosauridae, which is endemic to northern Mesoamerica (Mexico from Tamaulipas to Chiapas and into the montane portions of Alta Verapaz, Guatemala). All but one of these nine species is endemic to Mexico. Photo by Christian Berriozabal-Islas. Amphib. Reptile Conserv. | http://redlist-ARC.org 01 June 2013 | Volume 7 | Number 1 | e61 Copyright: © 2013 Wilson et al. This is an open-access article distributed under the terms of the Creative Com- mons Attribution–NonCommercial–NoDerivs 3.0 Unported License, which permits unrestricted use for non-com- Amphibian & Reptile Conservation 7(1): 1–47.
    [Show full text]
  • Towards a Glacial‐Sensitive Model of Island Biogeography
    Global Ecology and Biogeography, (Global Ecol. Biogeogr.) (2016)(2015) 25, 817–830 SPECIAL Towards a glacial-sensitive model of ISSUE island biogeography José María Fernández-Palacios1,2*, Kenneth F. Rijsdijk3, Sietze J. Norder3, Rüdiger Otto1, Lea de Nascimento1,2, Silvia Fernández-Lugo1, Even Tjørve4 and Robert J. Whittaker2,5 1Island Ecology and Biogeography Research ABSTRACT Group. Instituto Universitario de Although the role that Pleistocene glacial cycles have played in shaping the present Enfermedades Tropicales y Salud Pública de Canarias (IUETSPC), Universidad de La biota of oceanic islands world-wide has long been recognized, their geographical, Laguna, Tenerife, Canary Islands 38206, biogeographical and ecological implications have not yet been fully incorporated Spain, 2Conservation Biogeography and within existing biogeographical models. Here we summarize the different types of Macroecology Group, School of Geography and impacts that glacial cycles may have had on oceanic islands, including cyclic the Environment, South Parks Road, Oxford changes in climate, shifts in marine currents and wind regimes and, especially, OX1 3QY, UK, 3Computation GeoEcology cycles of sea level change. The latter have affected geographical parameters such as Group, Institute for Biodiversity and Ecosystem island area, isolation and elevation. They have also influenced the configurations of Dynamics & Institute for Interdisciplinary archipelagos via island fusion and fission, and cycles of seamount emergence and Studies, University of Amsterdam, Sciencepark submergence. We hypothesize that these sea level cycles have had significant 904, 1098 XH Amsterdam, The Netherlands, impacts on the biogeographical processes shaping oceanic island biotas, influencing 4Faculty of Economics and Organisation the rates and patterns of immigration and extinction and hence species richness.
    [Show full text]
  • Paleoclimate Reconstruction Along the Pole-Equator-Pole Transect of the Americas (PEP 1)
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln USGS Staff -- Published Research US Geological Survey 2000 Paleoclimate Reconstruction Along The Pole-Equator-Pole Transect of the Americas (PEP 1) Vera Markgraf Institute of Arctic and Alpine Research, University of Colorado. Boulder CO 80309-0450, USA T.R Baumgartner Scripps Oceanographic Institute, La Jolla CA 92093, USA J. P. Bradbury US Geological Survey, Denver Federal Center, MS 980, Denver CO 80225, USA H. F. Diaz National Oceanographic and Atmospheric Administration, Climate Diagnostic Center, 325 Broadway, Boulder CO 90303, USA R. B. Dunbar Department of Geological and Environmental Sciences, Stanford University, Stanford CA 94305-2115, USA See next page for additional authors Follow this and additional works at: https://digitalcommons.unl.edu/usgsstaffpub Part of the Earth Sciences Commons Markgraf, Vera; Baumgartner, T.R; Bradbury, J. P.; Diaz, H. F.; Dunbar, R. B.; Luckman, B. H.; Seltzer, G. O.; Swetnam, T. W.; and Villalba, R., "Paleoclimate Reconstruction Along The Pole-Equator-Pole Transect of the Americas (PEP 1)" (2000). USGS Staff -- Published Research. 249. https://digitalcommons.unl.edu/usgsstaffpub/249 This Article is brought to you for free and open access by the US Geological Survey at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in USGS Staff -- Published Research by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Authors Vera Markgraf, T.R Baumgartner, J. P. Bradbury, H. F. Diaz, R. B. Dunbar, B. H. Luckman, G. O. Seltzer, T. W. Swetnam, and R. Villalba This article is available at DigitalCommons@University of Nebraska - Lincoln: https://digitalcommons.unl.edu/ usgsstaffpub/249 Quaternary Science Reviews 19 (2000) 125}140 Paleoclimate reconstruction along the Pole}Equator}Pole transect of the Americas (PEP 1) Vera Markgraf!,*, T.R Baumgartner", J.
    [Show full text]
  • Linking Shade Coffee Certification to Biodiversity Conservation: Butterflies and Birds in Chiapas, Mexico
    Ecological Applications, 14(3), 2004, pp. 642±654 q 2004 by the Ecological Society of America LINKING SHADE COFFEE CERTIFICATION TO BIODIVERSITY CONSERVATION: BUTTERFLIES AND BIRDS IN CHIAPAS, MEXICO ALEXANDRE H. MAS AND THOMAS V. D IETSCH1 School of Natural Resources and Environment, University of Michigan, Ann Arbor, Michigan 48109-1115 USA Abstract. Shade coffee certi®cation programs have emerged over the past six years to verify that coffee marketed as ``shade grown'' is actually grown on farms that provide higher quality habitat for biodiversity. In spite of good intentions and an increasing market, little consensus exists on whether current criteria can successfully identify coffee farms of conservation signi®cance. This paper provides the ®rst ecological evaluation and compar- ison of shade-grown coffee criteria used by major certi®cation programs. Using vegetative data, we evaluated criteria developed by the Rainforest Alliance, the Smithsonian Migratory Bird Center (SMBC), and the Specialty Coffee Association of America across a range of coffee agroecosystems in Chiapas, Mexico, to determine which management practices each program would certify. Fruit-feeding butter¯ies and forest bird species found in these coffee agroecosystems were compared with nearby forest reserves as indicators of biodiversity and conservation potential. These agroecosystems fall into three categories: rustic, com- mercial polyculture, and shaded monoculture. The rustic system contained signi®cantly higher fruit-feeding butter¯y diversity and an avifauna more similar to that found in forest reserves than the other systems. This was also the only agroecosystem that met the criteria for all certi®cation programs, while the shaded monoculture fell short of all sets of criteria.
    [Show full text]
  • Multilocus Species Delimitation in the Crotalus Triseriatus Species Group (Serpentes: Viperidae: Crotalinae), with the Description of Two New Species
    Zootaxa 3826 (3): 475–496 ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2014 Magnolia Press ISSN 1175-5334 (online edition) http://dx.doi.org/10.11646/zootaxa.3826.3.3 http://zoobank.org/urn:lsid:zoobank.org:pub:8D8FCB6B-E1DC-4A00-9257-BCAB7D06AE22 Multilocus species delimitation in the Crotalus triseriatus species group (Serpentes: Viperidae: Crotalinae), with the description of two new species ROBERT W. BRYSON, JR.1,8, CHARLES W. LINKEM1, MICHAEL E. DORCAS2, AMY LATHROP3, JASON M. JONES4, JAVIER ALVARADO-DÍAZ5, CHRISTOPH I. GRÜNWALD6 & ROBERT W. MURPHY3,7 1Department of Biology & Burke Museum of Natural History and Culture, University of Washington, Box 351800, Seattle, WA 98195- 1800, USA. E-mail: [email protected] 2Department of Biology, Davidson College, Davidson, NC 28035-7118, USA. E-mail: [email protected] 3Centre for Biodiversity and Conservation Biology, Royal Ontario Museum, Toronto, Ontario, Canada M5S 2C6. E-mail: [email protected]; [email protected] 416310 Avenida Florencia, Poway, California 92064, USA. E-mail: [email protected] 5Instituto de Investigaciones sobre los Recursos Naturales, Universidad Michoacana de San Nicolás de Hidalgo, Av. San Juanito Itzic- uaro s/n, Col. Nueva Esperanza, C.P. 58337, Morelia, Michoacán, México. 6Carretera Chapala-Jocotepec Oriente #57-1, Col. Centro, C.P. 45920, Ajijic, Jalisco, México. E-mail: [email protected] 7State Key Laboratory of Genetic Resources and Evolution, and Yunnan Laboratory of Molecular Biology of Domestic Animals, Kun- ming Institute of Zoology, Chinese Academy of Sciences, 32 Jiaochang Donglu, Kunming 250223, Yunnan, China. E-mail: [email protected] 8Corresponding author.
    [Show full text]