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https://www.readbyqxmd.com/read/28431105/extinction-vs-rapid-radiation-the-juxtaposed-evolutionary-histories-of-coelotine-spiders-support-the-eocene-oligocene-orogenesis-of-the-tibetan-plateau
#1
Zhe Zhao, Shuqiang Li
Evolutionary biology has long been concerned with how changing environments affect and drive the spatiotemporal development of organisms. Coelotine spiders (Agelenidae: Coelotinae) are common species in the temperate and subtropical areas of the Northern Hemisphere. Their long evolutionary history and the extremely imbalanced distribution of species richness suggest that Eurasian environments, especially since the Cenozoic, are the drivers of their diversification. We use phylogenetics, molecular dating, ancestral area reconstructions, diversity, and ecological niche analyses to investigate the spatiotemporal evolution of 286 coelotine species from throughout the region...
April 20, 2017: Systematic Biology
https://www.readbyqxmd.com/read/28428864/integrating-biogeography-threat-and-evolutionary-data-to-explore-extinction-crisis-in-the-taxonomic-group-of-cycads
#2
Kowiyou Yessoufou, Barnabas H Daru, Respinah Tafirei, Hosam O Elansary, Isaac Rampedi
Will the ongoing extinction crisis cause a severe loss of evolutionary information accumulated over millions of years on the tree of life? This question has been largely explored, particularly for vertebrates and angiosperms. However, no equivalent effort has been devoted to gymnosperms. Here, we address this question focusing on cycads, the gymnosperm group exhibiting the highest proportion of threatened species in the plant kingdom. We assembled the first complete phylogeny of cycads and assessed how species loss under three scenarios would impact the cycad tree of life...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28424048/phylogeny-divergence-time-and-historical-biogeography-of-laetiporus-basidiomycota-polyporales
#3
Jie Song, Bao-Kai Cui
BACKGROUND: The aim of this study was to characterize the molecular relationship, origin and historical biogeography of the species in important brown rot fungal genus Laetiporus from East Asia, Europe, Pan-America, Hawaii and South Africa. We used six genetic markers to estimate a genus-level phylogeny including (1) the internal transcribed spacer (ITS), (2) nuclear large subunit rDNA (nrLSU), (3) nuclear small subunit rDNA (nrSSU), (4) translation elongation factor 1-α (EF-1α), (5) DNA-directed RNA polymerase II subunit 2 (RPB2), and (6) mitochondrial small subunit rDNA (mtSSU)...
April 20, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28412980/arctic-systems-in-the-quaternary-ecological-collision-faunal-mosaics-and-the-consequences-of-a-wobbling-climate
#4
E P Hoberg, J A Cook, S J Agosta, W Boeger, K E Galbreath, S Laaksonen, S J Kutz, D R Brooks
Climate oscillations and episodic processes interact with evolution, ecology and biogeography to determine the structure and complex mosaic that is the biosphere. Parasites and parasite-host assemblages are key components in a general explanatory paradigm for global biodiversity. We explore faunal assembly in the context of Quaternary time frames of the past 2.6 million years, a period dominated by episodic shifts in climate. Climate drivers cross a continuum from geological to contemporary timescales and serve to determine the structure and distribution of complex biotas...
April 17, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28411842/the-molecular-revolution-in-cutaneous-biology-investigating-the-skin%C3%A2-microbiome
#5
REVIEW
Heidi H Kong, Julia A Segre
Building upon the knowledge garnered from investigations utilizing traditional culturing methods, advances in sequencing technologies have catalyzed a revolution in studying human-associated microbes: bacteria, fungi and viruses. Skin microbiome research in healthy individuals and patients with dermatologic disorders has provided insights into the complexity and biogeography of human skin microbes. The continual developments in sequencing and analyses will provide increasingly sophisticated tools to interrogate human-associated microbes, ultimately to improve our understanding of health and disease...
May 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28407481/the-gut-microbiome-connecting-spatial-organization-to-function
#6
REVIEW
Carolina Tropini, Kristen A Earle, Kerwyn Casey Huang, Justin L Sonnenburg
The first rudimentary evidence that the human body harbors a microbiota hinted at the complexity of host-associated microbial ecosystems. Now, almost 400 years later, a renaissance in the study of microbiota spatial organization, driven by coincident revolutions in imaging and sequencing technologies, is revealing functional relationships between biogeography and health, particularly in the vertebrate gut. In this Review, we present our current understanding of principles governing the localization of intestinal bacteria, and spatial relationships between bacteria and their hosts...
April 12, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28406965/palaeolake-isolation-and-biogeographical-process-of-freshwater-fishes-in-the-yellow-river
#7
Bin Kang, Xiaoxia Huang, Yunfei Wu
The Yellow River, one of the very few in the Earth, originated from many dispersive palaeolakes. Taking this unique advantage, we examined the roles of palaeolake isolation vs. geological processes vs. climate in determining current fish biogeographic pattern. We reviewed available data on fish species and their geographical distribution in the river, as well as palaeolake development, geological and climatic parameters. The 138 fish species recorded in the river could be divided into 8 biogeographic regions, corresponding to the distribution of palaeolakes and respective endemic species...
2017: PloS One
https://www.readbyqxmd.com/read/28405400/microbe-biogeography-tracks-water-masses-in-a-dynamic-oceanic-frontal-system
#8
Anni Djurhuus, Philipp H Boersch-Supan, Svein-Ole Mikalsen, Alex D Rogers
Dispersal limitation, not just environmental selection, plays an important role in microbial biogeography. The distance-decay relationship is thought to be weak in habitats where dispersal is high, such as in the pelagic environment, where ocean currents facilitate microbial dispersal. Most studies of microbial community composition to date have observed little geographical heterogeneity on a regional scale (100 km). We present a study of microbial communities across a dynamic frontal zone in the southwest Indian Ocean and investigate the spatial structure of the microbes with respect to the different water masses separated by these fronts...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28404781/climatic-niche-evolution-is-faster-in-sympatric-than-allopatric-lineages-of-the-butterfly-genus-pyrgus
#9
Camille Pitteloud, Nils Arrigo, Tomasz Suchan, Alicia Mastretta-Yanes, Roger Vila, Vlad Dincă, Juan Hernández-Roldán, Ernst Brockmann, Yannick Chittaro, Irena Kleckova, Luca Fumagalli, Sven Buerki, Loïc Pellissier, Nadir Alvarez
Understanding how speciation relates to ecological divergence has long fascinated biologists. It is assumed that ecological divergence is essential to sympatric speciation, as a mechanism to avoid competition and eventually lead to reproductive isolation, while divergence in allopatry is not necessarily associated with niche differentiation. The impact of the spatial context of divergence on the evolutionary rates of abiotic dimensions of the ecological niche has rarely been explored for an entire clade. Here, we compare the magnitude of climatic niche shifts between sympatric versus allopatric divergence of lineages in butterflies...
April 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28404776/dry-habitats-were-crucibles-of-domestication-in-the-evolution-of-agriculture-in-ants
#10
Michael G Branstetter, Ana Ješovnik, Jeffrey Sosa-Calvo, Michael W Lloyd, Brant C Faircloth, Seán G Brady, Ted R Schultz
The evolution of ant agriculture, as practised by the fungus-farming 'attine' ants, is thought to have arisen in the wet rainforests of South America about 55-65 Ma. Most subsequent attine agricultural evolution, including the domestication event that produced the ancestor of higher attine cultivars, is likewise hypothesized to have occurred in South American rainforests. The 'out-of-the-rainforest' hypothesis, while generally accepted, has never been tested in a phylogenetic context. It also presents a problem for explaining how fungal domestication might have occurred, given that isolation from free-living populations is required...
April 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28401262/patterns-of-arbuscular-mycorrhizal-fungal-distribution-on-mainland-and-island-sandy-coastal-plain-ecosystems-in-brazil
#11
Iolanda Ramalho da Silva, Francisco Adriano de Souza, Danielle Karla Alves da Silva, Fritz Oehl, Leonor Costa Maia
Although sandy coastal plains are important buffer zones to protect the coast line and maintain biological diversity and ecosystem services, these ecosystems have been endangered by anthropogenic activities. Thus, information on coastal biodiversity and forces shaping coastal biological diversity are extremely important for effective conservation strategies. In this study, we aimed to compare arbuscular mycorrhizal (AM) fungal communities from soil samples collected on the mainland and nearby islands located in Brazilian sandy coastal plain ecosystems (Restingas) to get information about AM fungal biogeography and identify factors shaping these communities...
April 11, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28397328/dispersal-and-extrapolation-on-the-accuracy-of-temporal-predictions-from-distribution-models-for-the-darwin-s-frog
#12
David E Uribe-Rivera, Claudio Soto-Azat, Andrés Valenzuela-Sánchez, Gustavo Bizama, Javier A Simonetti, Patricio Pliscoff
Climate change is a major threat to biodiversity; the development of models that reliably predict its effects on species distributions is a priority for conservation biogeography. Two of the main issues for accurate temporal predictions from Species Distribution Models (SDM) are model extrapolation and unrealistic dispersal scenarios. We assessed the consequences of these issues on the accuracy of climate-driven SDM predictions for the dispersal-limited Darwin's frog Rhinoderma darwinii in South America. We calibrated models using historical data (1950-1975) and projected them across 40 years to predict distribution under current climatic conditions, assessing predictive accuracy through the area under the ROC curve (AUC) and True Skill Statistics (TSS), contrasting binary model predictions against temporal-independent validation dataset (i...
April 11, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28395262/salinity-and-macrophyte-drive-the-biogeography-of-the-sedimentary-bacterial-communities-in-a-brackish-water-tropical-coastal-lagoon
#13
Pratiksha Behera, Sofia Mahapatra, Madhusmita Mohapatra, Ji Yoon Kim, Tapan K Adhya, Vishakha Raina, Mrutyunjay Suar, Ajit K Pattnaik, Gurdeep Rastogi
Brackish water coastal lagoons are least understood with respect to the seasonal and temporal variability in their sedimentary bacterial communities. These coastal lagoons are characterized by the steep environmental gradient and provide an excellent model system to decipher the biotic and abiotic factors that determine the bacterial community structure over time and space. Using Illumina sequencing of the 16S rRNA genes from a total of 100 bulk surface sediments, we investigated the sedimentary bacterial communities, their spatiotemporal distribution, and compared them with the rhizosphere sediment communities of a common reed; Phragmites karka and a native seagrass species; Halodule uninervis in Chilika Lagoon...
April 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28393843/a-short-snouted-middle-triassic-phytosaur-and-its-implications-for-the-morphological-evolution-and-biogeography-of-phytosauria
#14
Michelle R Stocker, Li-Jun Zhao, Sterling J Nesbitt, Xiao-Chun Wu, Chun Li
Following the end-Permian extinction, terrestrial vertebrate diversity recovered by the Middle Triassic, and that diversity was now dominated by reptiles. However, those reptilian clades, including archosaurs and their closest relatives, are not commonly found until ~30 million years post-extinction in Late Triassic deposits despite time-calibrated phylogenetic analyses predicting an Early Triassic divergence for those clades. One of these groups from the Late Triassic, Phytosauria, is well known from a near-Pangean distribution, and this easily recognized clade bears an elongated rostrum with posteriorly retracted nares and numerous postcranial synapomorphies that are unique compared with all other contemporary reptiles...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28390908/molecular-phylogeny-and-biogeography-of-the-land-snail-family-hygromiidae-gastropoda-helicoidea
#15
Marco T Neiber, Oihana Razkin, Bernhard Hausdorf
The Hygromiidae is a highly diverse group of land snails with a distribution range stretching throughout the Palearctic region from the Macaronesian Islands to the Russian Far East and reaching southwards to the north-eastern Ethiopian region. So far, the classification of the family largely rested on the structure of the dart apparatus, an accessory genital organ. We used nuclear and mitochondrial DNA sequences of almost all genera to reconstruct the phylogeny of the Hygromiidae. Several of the clades found in the molecular phylogenetic analyses represent regional radiations that partly show a high variation in the structure of the dart apparatus...
April 5, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28388891/eobowenia-gen-nov-from-the-early-cretaceous-of-patagonia-indication-for-an-early-divergence-of-bowenia
#16
Mario Coiro, Christian Pott
BACKGROUND: Even if they are considered the quintessential "living fossils", the fossil record of the extant genera of the Cycadales is quite poor, and only extends as far back as the Cenozoic. This lack of data represents a huge hindrance for the reconstruction of the recent history of this important group. Among extant genera, Bowenia (or cuticles resembling those of extant Bowenia) has been recorded in sediments from the Late Cretaceous and the Eocene of Australia, but its phylogenetic placement and the inference from molecular dating still imply a long ghost lineage for this genus...
April 7, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28387250/symbiosis-limits-establishment-of-legumes-outside-their-native-range-at-a-global-scale
#17
Anna K Simonsen, Russell Dinnage, Luke G Barrett, Suzanne M Prober, Peter H Thrall
Microbial symbiosis is integral to plant growth and reproduction, but its contribution to global patterns of plant distribution is unknown. Legumes (Fabaceae) are a diverse and widely distributed plant family largely dependent on symbiosis with nitrogen-fixing rhizobia, which are acquired from soil after germination. This dependency is predicted to limit establishment in new geographic areas, owing to a disruption of compatible host-symbiont associations. Here we compare non-native establishment patterns of symbiotic and non-symbiotic legumes across over 3,500 species, covering multiple independent gains and losses of rhizobial symbiosis...
April 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28384240/supplementary-cranial-description-of-the-types-of-edmontosaurus-regalis-ornithischia-hadrosauridae-with-comments-on-the-phylogenetics-and-biogeography-of-hadrosaurinae
#18
Hai Xing, Jordan C Mallon, Margaret L Currie
The cranial anatomy of the flat-skulled hadrosaurine Edmontosaurus regalis (Ornithischia: Hadrosauridae) is extensively described here, based on the holotype and paratype collected from the middle part of the Horseshoe Canyon Formation in southern Alberta. Focus is given to previously undocumented features of ontogenetic and phylogenetic importance. This description facilitates overall osteological comparisons between E. regalis and other hadrosaurids (especially E. annectens), and revises the diagnosis of E...
2017: PloS One
https://www.readbyqxmd.com/read/28379991/the-geography-of-hotspots-of-rarity-weighted-richness-of-birds-and-their-coverage-by-natura-2000
#19
Fábio Suzart de Albuquerque, Andrew Gregory
A major challenge for biogeographers and conservation planners is to identify where to best locate or distribute high-priority areas for conservation and to explore whether these areas are well represented by conservation actions such as protected areas (PAs). We aimed to identify high-priority areas for conservation, expressed as hotpots of rarity-weighted richness (HRR)-sites that efficiently represent species-for birds across EU countries, and to explore whether HRR are well represented by the Natura 2000 network...
2017: PloS One
https://www.readbyqxmd.com/read/28374781/microbial-biogeography-and-core-microbiota-of-the-rat-digestive-tract
#20
Dongyao Li, Haiqin Chen, Bingyong Mao, Qin Yang, Jianxin Zhao, Zhennan Gu, Hao Zhang, Yong Q Chen, Wei Chen
As a long-standing biomedical model, rats have been frequently used in studies exploring the correlations between gastrointestinal (GI) bacterial biota and diseases. In the present study, luminal and mucosal samples taken along the longitudinal axis of the rat digestive tract were subjected to 16S rRNA gene sequencing-based analysis to determine the baseline microbial composition. Results showed that the community diversity increased from the upper to lower GI segments and that the stratification of microbial communities as well as shift of microbial metabolites were driven by biogeographic location...
April 4, 2017: Scientific Reports
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