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https://www.readbyqxmd.com/read/28937810/historical-biogeography-and-extinction-in-the-hawaiian-honeycreepers
#1
Robert E Ricklefs
Hawaiian honeycreepers, comprising an endemic radiation of passerine birds in the Hawaiian archipelago, have suffered losses of individual island populations and the extinction of many species as a result of colonization of the islands by Polynesians and, more recently, introduced avian pox virus and avian malaria. Here, I test the idea that populations have an intrinsic tendency toward extinction regardless of the cause. The distribution of each species before the arrival of humans in the archipelago was inferred from present distribution, historical records, and fossil remains...
October 2017: American Naturalist
https://www.readbyqxmd.com/read/28931960/schusteria-marina-sp-nov-acari-oribatida-selenoribatidae-an-intertidal-mite-from-caribbean-coasts-with-remarks-on-taxonomy-biogeography-and-ecology
#2
Tobias Pfingstl, Andrea Lienhard
Schusteria marina sp. nov. is a newly discovered intertidal mite species found on the Lesser Antillean Islands of Martinique and Grenada. It represents the first record of the genus Schusteria within the Caribbean area. Schusteria marina sp. nov. is very similar to the type species, S. littorea from Brazil, but can be distinguished by its smaller body size, a median sternal dark sclerotized small ridge on epimeron I and a few other less pronounced differences. Both species are closely related and form a Western Atlantic Schusteria clade, which is characterized by the possession of a pair of faint anterior epimeral ridges...
August 18, 2017: International Journal of Acarology
https://www.readbyqxmd.com/read/28927652/epicormic-resprouting-in-fire-prone-ecosystems
#3
REVIEW
Juli G Pausas, Jon E Keeley
Many plants resprout from basal buds after disturbance, and this is common in shrublands subjected to high-intensity fires. However, resprouting after fire from epicormic (stem) buds is globally far less common. Unlike basal resprouting, post-fire epicormic resprouting is a key plant adaptation for retention of the arborescent skeleton after fire, allowing rapid recovery of the forest or woodland and leading to greater ecosystem resilience under recurrent high-intensity fires. Here we review the biogeography of epicormic resprouting, the mechanisms of protection, the fire regimes where it occurs, and the evolutionary drivers that shaped this trait...
September 16, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28921530/sympatric-parallel-diversification-of-major-oak-clades-in-the-americas-and-the-origins-of-mexican-species-diversity
#4
Andrew L Hipp, Paul S Manos, Antonio González-Rodríguez, Marlene Hahn, Matthew Kaproth, John D McVay, Susana Valencia Avalos, Jeannine Cavender-Bares
Oaks (Quercus, Fagaceae) are the dominant tree genus of North America in species number and biomass, and Mexico is a global center of oak diversity. Understanding the origins of oak diversity is key to understanding biodiversity of northern temperate forests. A phylogenetic study of biogeography, niche evolution and diversification patterns in Quercus was performed using 300 samples, 146 species. Next-generation sequencing data were generated using the restriction-site associated DNA (RAD-seq) method. A time-calibrated maximum likelihood phylogeny was inferred and analyzed with bioclimatic, soils, and leaf habit data to reconstruct the biogeographic and evolutionary history of the American oaks...
September 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28919946/cytogenetic-characterization-of-hoplias-malabaricus-bloch-1794-from-the-ctalamochita-river-c%C3%A3-rdoba-argentina-first-evidence-for-southernmost-populations-of-this-species-complex-and-comments-on-its-biogeography
#5
Diego Javier Grassi, Ana Claudia Swarça, Jorge Abdala Dergam, María Cristina Pastori, Alberto Sergio Fenocchio
Hoplias malabaricus (Bloch, 1794), a predatory freshwater fish with a wide distribution throughout South America, represents a species complex with seven well characterized karyomorphs at the cytogenetic level. Although this species has been extensively studied in several Brazilian basins, data are still scarce for hydrographic systems from other South American countries. This study aims to characterize cytogenetically the Hoplias malabaricus populations from the Argentinean Central Region, close to the southernmost distribution of this species complex...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919506/the-role-of-climatic-cycles-and-trans-saharan-migration-corridors-in-species-diversification-biogeography-of-psammophis-schokari-group-in-north-africa
#6
Duarte Vasconcelos Gonçalves, Fernando Martínez-Freiría, Pierre-André Crochet, Philippe Geniez, Salvador Carranza, José Carlos Brito
Highlands, hydrographic systems and coastal areas have been hypothesised to form corridors across the hyperarid Sahara desert in North Africa, allowing dispersal and gene flow for non-xeric species. Here we aim to provide a genetic test for the trans-Saharan corridor model, and predict the location and stability of ecological-corridors, by combining phylogeography and palaeoclimatic modelling. The model was the Psammophis schokari (Schokari sand racer) group, fast-moving and widely distributed generalist colubrids occurring mostly in arid and semiarid scrublands...
September 14, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28919504/cryptic-elevational-zonation-in-trapdoor-spiders-araneae-antrodiaetidae-aliatypus-janus-complex-from-the-california-southern-sierra-nevada
#7
James Starrett, Cheryl Y Hayashi, Shahan Derkarabetian, Marshal Hedin
The relative roles of ecological niche conservatism versus niche divergence in promoting montane speciation remains an important topic in biogeography. Here, our aim was to test whether lineage diversification in a species complex of trapdoor spiders corresponds with riverine barriers or with an ecological gradient associated with elevational tiering. Aliatypus janus was sampled from throughout its range, with emphasis on populations in the southern Sierra Nevada Mountains of California. We collected multi-locus genetic data to generate a species tree for A...
September 15, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28904999/linking-spatial-structure-and-community-level-biotic-interactions-through-cooccurrence-and-time-series-modeling-of-the-human-intestinal-microbiota
#8
Eric J de Muinck, Knut E A Lundin, Pål Trosvik
The gastrointestinal (GI) microbiome is a densely populated ecosystem where dynamics are determined by interactions between microbial community members, as well as host factors. The spatial organization of this system is thought to be important in human health, yet this aspect of our resident microbiome is still poorly understood. In this study, we report significant spatial structure of the GI microbiota, and we identify general categories of spatial patterning in the distribution of microbial taxa along a healthy human GI tract...
September 2017: MSystems
https://www.readbyqxmd.com/read/28904788/biogeography-and-systematics-of-endemic-island-damselflies-the-nesobasis-and-melanesobasis-odonata-zygoptera-of-fiji
#9
Christopher D Beatty, Melissa Sánchez Herrera, Jeffrey H Skevington, Arash Rashed, Hans Van Gossum, Scott Kelso, Thomas N Sherratt
The study of island fauna has greatly informed our understanding of the evolution of diversity. We here examine the phylogenetics, biogeography, and diversification of the damselfly genera Nesobasis and Melanesobasis, endemic to the Fiji Islands, to explore mechanisms of speciation in these highly speciose groups. Using mitochondrial (COI, 12S) and nuclear (ITS) replicons, we recovered garli-part maximum likelihood and mrbayes Bayesian phylogenetic hypotheses for 26 species of Nesobasis and eight species/subspecies of Melanesobasis...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28904785/genomic-timetree-and-historical-biogeography-of-caribbean-island-ameiva-lizards-pholidoscelis-teiidae
#10
Derek B Tucker, Stephen Blair Hedges, Guarino R Colli, Robert Alexander Pyron, Jack W Sites
The phylogenetic relationships and biogeographic history of Caribbean island ameivas (Pholidoscelis) are not well-known because of incomplete sampling, conflicting datasets, and poor support for many clades. Here, we use phylogenomic and mitochondrial DNA datasets to reconstruct a well-supported phylogeny and assess historical colonization patterns in the group. We obtained sequence data from 316 nuclear loci and one mitochondrial marker for 16 of 19 extant species of the Caribbean endemic genus Pholidoscelis...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28904751/the-thermal-niche-of-neotropical-nectar-feeding-bats-its-evolution-and-application-to-predict-responses-to-global-warming
#11
Stephanie Ortega-García, Lázaro Guevara, Joaquín Arroyo-Cabrales, Roberto Lindig-Cisneros, Enrique Martínez-Meyer, Ernesto Vega, Jorge E Schondube
The thermal niche of a species is one of the main determinants of its ecology and biogeography. In this study, we determined the thermal niche of 23 species of Neotropical nectar-feeding bats of the subfamily Glossophaginae (Chiroptera, Phyllostomidae). We calculated their thermal niches using temperature data obtained from collection records, by generating a distribution curve of the maximum and minimum temperatures per locality, and using the inflection points of the temperature distributions to estimate the species optimal (STZ) and suboptimal (SRZ) zones of the thermal niche...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28891110/protein-digestion-of-baby-foods-study-approaches-and-implications-for-infant-health
#12
REVIEW
Junai Gan, Gail M Bornhorst, Bethany M Henrick, J Bruce German
Protein digestion is critical for infants. Dissimilarities between infants and adults in food intake and digestive physiology lead to distinct patterns of proteolysis between individuals. However, such differences are not well represented in many studies on protein digestion of baby foods. The complex biological structures of baby foods and the physiology of the infant digestive system are key factors affecting proteolysis during the first two years of life. Well-controlled in vitro studies have demonstrated that varying digestion conditions alter the specificity, rate, and extent of proteolysis of baby foods...
September 11, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28881933/incorporating-context-dependency-of-species-interactions-in-species-distribution-models
#13
Nina K Lany, Phoebe L Zarnetske, Tarik C Gouhier, Bruce A Menge
Species distribution models typically use correlative approaches that characterize the species-environment relationship using occurrence or abundance data for a single species. However, species distributions are determined by both abiotic conditions and biotic interactions with other species in the community. Therefore, climate change is expected to impact species through direct effects on their physiology and indirect effects propagated through their resources, predators, competitors, or mutualists. Furthermore, the sign and strength of species interactions can change according to abiotic conditions, resulting in context-dependent species interactions that may change across space or with climate change...
July 1, 2017: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/28881067/the-diversity-and-biogeography-of-abundant-and-rare-intertidal-marine-microeukaryotes-explained-by-environment-and-dispersal-limitation
#14
Wenjing Zhang, Yongbo Pan, Jun Yang, Huihuang Chen, Bridget Holohan, Jamie Vaudrey, Senjie Lin, George B McManus
Benthic microeukaryotes are key ecosystem drivers in marine sandy beaches, an important and dynamic environment; however, little is known about their diversity and biogeography on a large spatial scale. Here we investigated the community composition and geographical distributions of benthic microeukaryotes using high-throughput sequencing of the 18S rDNA, and quantified the contributions of environmental factors and spatial separation on the distribution patterns of both rare and abundant taxa. We collected 36 intertidal samples at 12 sandy beaches from four regions that spanned distances from 0...
September 7, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28880929/correction-floristic-characteristics-and-affinities-in-lao-pdr-with-a-reference-to-the-biogeography-of-the-indochina-peninsula
#15
https://www.readbyqxmd.com/read/28874906/megafauna-of-the-uksrl-exploration-contract-area-and-eastern-clarion-clipperton-zone-in-the-pacific-ocean-annelida-arthropoda-bryozoa-chordata-ctenophora-mollusca
#16
Diva J Amon, Amanda F Ziegler, Jeffrey C Drazen, Andrei V Grischenko, Astrid B Leitner, Dhugal J Lindsay, Janet R Voight, Mary K Wicksten, Craig M Young, Craig R Smith
BACKGROUND: There is growing interest in mining polymetallic nodules from the abyssal Clarion-Clipperton Zone (CCZ) in the tropical Pacific Ocean. Despite having been the focus of environmental studies for decades, the benthic megafauna of the CCZ remain poorly known. To predict and manage the environmental impacts of mining in the CCZ, baseline knowledge of the megafauna is essential. The ABYSSLINE Project has conducted benthic biological baseline surveys in the UK Seabed Resources Ltd polymetallic-nodule exploration contract area (UK-1)...
2017: Biodiversity Data Journal
https://www.readbyqxmd.com/read/28861238/explosive-radiation-and-spatial-expansion-across-the-cold-environments-of-the-old-world-in-an-avian-family
#17
Baoyan Liu, Per Alström, Urban Olsson, Jon Fjeldså, Qing Quan, Kees C S Roselaar, Takema Saitoh, Cheng-Te Yao, Yan Hao, Wenjuan Wang, Yanhua Qu, Fumin Lei
Our objective was to elucidate the biogeography and speciation patterns in an entire avian family, which shows a complex pattern of overlapping and nonoverlapping geographical distributions, and much variation in plumage, but less in size and structure. We estimated the phylogeny and divergence times for all of the world's species of Prunella based on multiple genetic loci, and analyzed morphometric divergence and biogeographical history. The common ancestor of Prunella was present in the Sino-Himalayan Mountains or these mountains and Central Asia-Mongolia more than 9 million years ago (mya), but a burst of speciations took place during the mid-Pliocene to early Pleistocene...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28861223/populations-genetically-rifting-within-a-complex-geological-system-the-case-of-strong-structure-and-low-genetic-diversity-in-the-migratory-freshwater-catfish-bagrus-docmak-in-east-africa
#18
Rose Komugisha Basiita, Kyall Richard Zenger, Dean Robert Jerry
The complex geological history of East Africa has been a driving factor in the rapid evolution of teleost biodiversity. While there is some understanding of how macroevolutionary drivers have shaped teleost speciation in East Africa, there is a paucity of research into how the same biogeographical factors have affected microevolutionary processes within lakes and rivers. To address this deficiency, population genetic diversity, demography, and structure were investigated in a widely distributed and migratory (potamodromous) African teleost species, Ssemutundu (Bagrus docmak)...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28860356/island-biogeography-taking-the-long-view-of-nature-s-laboratories
#19
REVIEW
Robert J Whittaker, José María Fernández-Palacios, Thomas J Matthews, Michael K Borregaard, Kostas A Triantis
Islands provide classic model biological systems. We review how growing appreciation of geoenvironmental dynamics of marine islands has led to advances in island biogeographic theory accommodating both evolutionary and ecological phenomena. Recognition of distinct island geodynamics permits general models to be developed and modified to account for patterns of diversity, diversification, lineage development, and trait evolution within and across island archipelagos. Emergent patterns of diversity include predictable variation in island species-area relationships, progression rule colonization from older to younger land masses, and syndromes including loss of dispersability and secondary woodiness in herbaceous plant lineages...
September 1, 2017: Science
https://www.readbyqxmd.com/read/28860145/the-respiratory-tract-microbial-biogeography-in-alcohol-use-disorder
#20
Derrick R Samuelson, Ellen L Burnham, Vincent J Maffei, R William Vandivier, Eugene E Blanchard, Judd E Shellito, Meng Luo, Christopher M Taylor, David A Welsh
RATIONALE: Individuals with alcohol use disorders (AUDs) are at an increased risk of pneumonia and acute respiratory distress syndrome. Data of the lung microbiome in the setting of AUDs are lacking. The objective of this study was to determine the microbial biogeography of the upper and lower respiratory tract in individuals with AUDs compared to non-AUD subjects. MATERIALS AND METHODS: Gargle, protected bronchial brush, and bronchoalveolar lavage specimens were collected during research bronchoscopies...
August 31, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
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