646 results match your criteria sympatric sites

Wild robust capuchin monkey interactions with sympatric primates.

Primates 2021 May 4. Epub 2021 May 4.

Neotropical Primates Research Group, São Paulo, Brazil.

Examining interactions among sympatric primate species can provide interesting information about competition, cooperation, and avoidance between those species. Those interactions can be neutral, positive, or negative for the species involved. Capuchin monkeys are medium-sized primates that can encounter both larger and smaller primates in their varied habitats. Read More

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Evolutionary drivers of sexual signal variation in Amazon Slender Anoles.

Evolution 2021 Apr 16. Epub 2021 Apr 16.

Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia, 20560.

Phenotypic variation among populations, as seen in the signaling traits of many species, provides an opportunity to test whether similar factors generate repeated phenotypic patterns in different parts of a species' range. We investigated whether genetic divergence, abiotic gradients, and sympatry with closely related species explain variation in the dewlap colors of Amazon Slender Anoles, Anolis fuscoauratus. To this aim, we characterized dewlap diversity in the field with respect to population genetic structure and evolutionary relationships, assessed whether dewlap phenotypes are associated with climate or landscape variables, and tested for nonrandom associations in the distributions of A. Read More

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Ring distribution patterns-diversification or speciation? Comparative phylogeography of two small mammals in the mountains surrounding the Sichuan Basin.

Mol Ecol 2021 Apr 5. Epub 2021 Apr 5.

Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.

Studying the genetic differentiation in a unique geographical area contributes to understanding the process of speciation. Here, we explore the spatial genetic structure and underlying formation mechanism of two congeneric small mammal species (Apodemus draco and A. chevrieri), which are mainly distributed in the mountains surrounding the lowland Sichuan Basin, southwest China. Read More

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Adaptive Divergence under Gene Flow along an Environmental Gradient in Two Coexisting Stickleback Species.

Genes (Basel) 2021 Mar 18;12(3). Epub 2021 Mar 18.

Faculty of Biosciences and Aquaculture, Nord University, N-8049 Bodø, Norway.

There is a general and solid theoretical framework to explain how the interplay between natural selection and gene flow affects local adaptation. Yet, to what extent coexisting closely related species evolve collectively or show distinctive evolutionary responses remains a fundamental question. To address this, we studied the population genetic structure and morphological differentiation of sympatric three-spined and nine-spined stickleback. Read More

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Blood Parasites in Sympatric Vultures: Role of Nesting Habits and Effects on Body Condition.

Int J Environ Res Public Health 2021 03 2;18(5). Epub 2021 Mar 2.

Department of Evolutionary, Ecology, National Museum of Natural Sciences, CSIC. José Gutiérrez Abascal 2, 28006 Madrid, Spain.

Avian haemosporidians are a common and widespread group of vector-borne parasites capable of infecting most bird species around the world. They can negatively affect host condition and fitness. Vultures are assumed to have a very low prevalence of these blood parasites, likely due to their strong immunity; however, factors contributing to variation in host exposure and susceptibility to haemosporidians are complex, and supporting evidence is still very limited. Read More

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Divergent diapause life history timing drives both allochronic speciation and reticulate hybridization in an adaptive radiation of Rhagoletis flies.

Mol Ecol 2021 Mar 31. Epub 2021 Mar 31.

Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA.

Divergent adaptation to new ecological opportunities can be an important factor initiating speciation. However, as niches are filled during adaptive radiations, trait divergence driving reproductive isolation between sister taxa may also result in trait convergence with more distantly related taxa, increasing the potential for reticulated gene flow across the radiation. Here, we demonstrate such a scenario in a recent adaptive radiation of Rhagoletis fruit flies, specialized on different host plants. Read More

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Density responses of lesser-studied carnivores to habitat and management strategies in southern Tanzania's Ruaha-Rungwa landscape.

PLoS One 2021 30;16(3):e0242293. Epub 2021 Mar 30.

Faculty of Natural Sciences, Imperial College London, Ascot, United Kingdom.

Compared to emblematic large carnivores, most species of the order Carnivora receive little conservation attention despite increasing anthropogenic pressure and poor understanding of their status across much of their range. We employed systematic camera trapping and spatially explicit capture-recapture modelling to estimate variation in population density of serval, striped hyaena and aardwolf across the mixed-use Ruaha-Rungwa landscape in southern Tanzania. We selected three sites representative of different habitat types, management strategies, and levels of anthropogenic pressure: Ruaha National Park's core tourist area, dominated by Acacia-Commiphora bushlands and thickets; the Park's miombo woodland; and the neighbouring community-run MBOMIPA Wildlife Management Area, also covered in Acacia-Commiphora. Read More

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Not Goanna Get Me: Mutations in the Savannah Monitor Lizard (Varanus exanthematicus) Nicotinic Acetylcholine Receptor Confer Reduced Susceptibility to Sympatric Cobra Venoms.

Neurotox Res 2021 Mar 20. Epub 2021 Mar 20.

Venom Evolution Lab, School of Biological Sciences, The University of Queensland, St. Lucia, QLD, 4072, Australia.

Antagonistic coevolutionary relationships provide intense selection pressure which drive changes in the genotype. Predator-prey interactions have caused some venomous snakes and their predators/prey to evolve α-neurotoxin resistance through changes at the orthosteric site of nicotinic acetylcholine receptors. The presence of negatively charged amino acids at orthosteric site positions 191 and 195 is the ancestral state. Read More

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Natural hybridization between two butterfly bushes in Tibet: dominance of F hybrids promotes strong reproductive isolation.

BMC Plant Biol 2021 Mar 10;21(1):133. Epub 2021 Mar 10.

Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations/ Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China.

Background: It has been recognized that a certain amount of habitat disturbance is a facilitating factor for the occurrence of natural hybridization, yet to date we are unaware of any studies exploring hybridization and reproductive barriers in those plants preferentially occupying disturbed habitats. Buddleja plants (also called butterfly bush) generally do grow in disturbed habitats, and several species with hybrid origin have been proposed, based solely on morphological evidence.

Results: In the present study, we test the hypothesis that B. Read More

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Response diversity in corals: hidden differences in bleaching mortality among cryptic Pocillopora species.

Ecology 2021 Mar 10:e03324. Epub 2021 Mar 10.

Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA, 91330-8303, USA.

Variation among functionally similar species in their response to environmental stress buffers ecosystems from changing states. Functionally similar species may often be cryptic species representing evolutionarily distinct genetic lineages that are morphologically indistinguishable. However, the extent to which cryptic species differ in their response to stress, and could therefore provide a source of response diversity, remains unclear because they are often not identified or are assumed to be ecologically equivalent. Read More

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Disease Surveillance during the Reintroduction of the Iberian Lynx () in Southwestern Spain.

Animals (Basel) 2021 Feb 19;11(2). Epub 2021 Feb 19.

Instituto de Investigación en Recursos Cinegéticos-(CSIC-UCLM-JCCM), 13071 Ciudad Real, Spain.

The restoration of Iberian lynx () populations in Extremadura (Southwestern Spain) have been carried out since 2014. One of the measures to ensure the success of this program is to examine the effects that diseases may have on reintroduction. Since diseases may be greatly located at certain sites because of the specific ecological requirements of the pathogens and/or vectors, reintroduced individuals may present a risk of infection once released. Read More

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February 2021

Genomic population structure of sympatric sexual and asexual populations in a parasitic wasp, Meteorus pulchricornis (Hymenoptera: Braconidae), inferred from six hundred single-nucleotide polymorphism loci.

Mol Ecol 2021 04 26;30(7):1612-1623. Epub 2021 Feb 26.

Graduate School of Agricultural Science, Kobe University, Nada, Kobe, Japan.

In spite of the two-fold reproductive advantage, asexual reproduction is not common in nature, probably due to the associated genetic deterioration or reduced genetic variation. To understand how genetic diversity is maintained in existing asexual populations, we investigated the genetic diversity and population structure of sympatric sexual and asexual populations of a parasitic wasp, Meteorus pulchricornis, using 614 genome-wide single nucleotide polymorphisms. The genetic structures of the apomictic asexual populations were distinct, showing considerable genetic differentiation among them. Read More

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A New Variant B Chromosome in Auchenipteridae: The Role of (GATA)n and (TTAGGG)n Sequences in Understanding the Evolution of Supernumeraries in Trachelyopterus.

Cytogenet Genome Res 2021 Feb 18:1-12. Epub 2021 Feb 18.

Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Cascavel, Brazil,

Basic and molecular cytogenetic techniques were carried out in 3 Neotropical region populations of catfishes, two of Trachelyopterus galeatus (one from the marshlands of Paraguay River basin and another from Lago Catalão, Amazon River basin) and one of Trachelyopterus porosus, a sympatric population to T. galeatus from the Amazon River basin. This study aimed to describe and understand the structure and evolution of Trachelyopterus B chromosomes, mainly through physical mapping of repetitive elements. Read More

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February 2021

Spatial patterns in phage-Rhizobium coevolutionary interactions across regions of common bean domestication.

ISME J 2021 Feb 8. Epub 2021 Feb 8.

Centro de Ciencias Genómicas, Universidad Nacional Autonóma de México, Mexico, Mexico.

Bacteriophages play significant roles in the composition, diversity, and evolution of bacterial communities. Despite their importance, it remains unclear how phage diversity and phage-host interactions are spatially structured. Local adaptation may play a key role. Read More

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February 2021

Patterns of Epigenetic Diversity in Two Sympatric Fish Species: Genetic vs. Environmental Determinants.

Genes (Basel) 2021 Jan 16;12(1). Epub 2021 Jan 16.

Centre National de la Recherche Scientifique (CNRS), Université Paul Sabatier (UPS), Station d'Ecologie Théorique et Expérimentale, UMR 5321, F-09200 Moulis, France.

Epigenetic components are hypothesized to be sensitive to the environment, which should permit species to adapt to environmental changes. In wild populations, epigenetic variation should therefore be mainly driven by environmental variation. Here, we tested whether epigenetic variation (DNA methylation) observed in wild populations is related to their genetic background, and/or to the local environment. Read More

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January 2021

Timing strains of the marine insect Clunio marinus diverged and persist with gene flow.

Mol Ecol 2021 03 29;30(5):1264-1280. Epub 2021 Jan 29.

Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany.

Genetic divergence of populations in the presence of gene flow is a central theme in speciation research. Theory predicts that divergence can happen with full range overlap - in sympatry - driven by ecological factors, but there are few empirical examples of how ecologically divergent selection can overcome gene flow and lead to reproductive isolation. In the marine midge Clunio marinus (Diptera: Chironomidae) reproduction is ecologically restricted to the time of the lowest tides, which is ensured through accurate control of development and adult emergence by circalunar and circadian clocks. Read More

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Culture-free genome-wide locus sequence typing (GLST) provides new perspectives on Trypanosoma cruzi dispersal and infection complexity.

PLoS Genet 2020 12 16;16(12):e1009170. Epub 2020 Dec 16.

Institute of Biodiversity, Animal Health & Comparative Medicine, University of Glasgow, Glasgow, United Kingdom.

Analysis of genetic polymorphism is a powerful tool for epidemiological surveillance and research. Powerful inference from pathogen genetic variation, however, is often restrained by limited access to representative target DNA, especially in the study of obligate parasitic species for which ex vivo culture is resource-intensive or bias-prone. Modern sequence capture methods enable pathogen genetic variation to be analyzed directly from host/vector material but are often too complex and expensive for resource-poor settings where infectious diseases prevail. Read More

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December 2020

Floral Color Variation in Is Associated With Switches in Beetle Pollinator Assemblages.

Front Plant Sci 2020 17;11:606259. Epub 2020 Nov 17.

Department of Botany and Zoology, Stellenbosch University, Stellenbosch, South Africa.

Floral color shifts are thought to be one of the most common evolutionary transitions in plants, and pollinators are often proposed as important selective agents driving these transitions. However, shifts in flower color can also be related to neutral genetic processes or pleiotropy linked with selection via other biotic agents or abiotic factors. Here we ask whether abiotic factors or pollinators provide the best explanation for divergence in flower color among populations of the sundew s. Read More

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November 2020

Estimations of Riverine Distribution, Abundance, and Biomass of Anguillid Eels in Japan and Taiwan Using Environmental DNA Analysis.

Zool Stud 2020 9;59:e17. Epub 2020 Jun 9.

Graduate School of Human Development and Environment, Kobe University, 3-11, Tsurukabuto, Nadaku, Kobe, Hyogo 657-8501, Japan. E-mail: (Sakata); (Minamoto).

Although populations of anguillid eels have declined remarkably in recent decades, monitoring data on the spatial and temporal variation in their dynamics are often limited, particularly for tropical eel species. As there are often sympatries of multiple eel species in tropical rivers, identifying eel species based solely on morphological characteristics is challenging. Basin-scale surveys were conducted in rivers of southern Japan and northern Taiwan to investigate (1) whether the spatial distribution, abundance, and biomass of the tropical eel species, the giant mottled eel (), can be monitored in rivers by comparing the results obtained from environmental DNA (eDNA) analysis with data from electrofishing and (2) the riverine distribution of the sympatric and the temperate eel species, the Japanese eel (), in this region using eDNA analysis. Read More

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A New Species of Monocystis (Apicomplexa: Gregarina: Monocystidae) from the Asian Invasive Earthworm Amynthas agrestis (Megascolecidae), with an Improved Standard for Monocystis Species Descriptions.

J Parasitol 2020 11;106(6):735-741

Department of Biology, University of Vermont, Burlington, Vermont 05405.

Monocystis perplexa n. sp., a parasite of an important invasive Japanese earthworm in North America, Amynthas agrestis, is described from a site in Vermont. Read More

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November 2020

An unusual microbiome characterises a spatially-aggressive crustose alga rapidly overgrowing shallow Caribbean reefs.

Sci Rep 2020 11 30;10(1):20949. Epub 2020 Nov 30.

Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA, 91330-8303, USA.

Several species of crustose coralline algae (CCA) and their associated microbial biofilms play important roles in determining the settlement location of scleractinian corals on tropical reefs. In recent decades, peyssonnelid algal crusts (PAC) have become spatial dominants across large areas of shallow Caribbean reefs, where they appear to deter the recruitment of scleractinians. Our genetic investigations of PAC in St. Read More

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November 2020

Insecticide Resistance Profiling of and Populations in the Southern Senegal: Role of Target Sites and Metabolic Resistance Mechanisms.

Genes (Basel) 2020 Nov 25;11(12). Epub 2020 Nov 25.

Centre for Research in Infectious Diseases (CRID) BP 13591, Yaoundé, Cameroon.

The emergence and spread of insecticide resistance among the main malaria vectors is threatening the effectiveness of vector control interventions in Senegal. The main drivers of this resistance in the complex (e.g. Read More

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November 2020

Unexpected Species Identities and Interspecific Relationships in a Subterranean Beetle Lineage, the Species Group (Coleoptera, Carabidae), Revealed by Fine-Scale Field Sampling and Detailed Morphological Comparisons.

Insects 2020 Nov 14;11(11). Epub 2020 Nov 14.

1-14-16 Awayama, Niigata-shi, Niigata 950-0843, Japan.

An endemic subterranean Japanese carabid beetle lineage, the species group, was recently revealed to have marked regional differentiation. Studies of such features reveal insect species diversity and provide insight into the mechanisms driving species diversity. We examined specimens of this species group collected from the southern Tohoku District of Honshu, Japan, where its diversity has not yet been fully elucidated, using fine-scale field sampling and detailed comparative morphological analysis of male genitalia. Read More

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November 2020

Patterns of Sphaeridiotrema pseudoglobulus infection in sympatric and allopatric hosts (Bithynia tentaculata) originating from widely separated sites across the USA.

Parasitol Res 2021 Jan 11;120(1):187-195. Epub 2020 Nov 11.

River Studies Center, University of Wisconsin-La Crosse, 1725 State Street, La Crosse, WI, 54601, USA.

In circumstances where populations of invasive species occur across variable landscapes, interactions among invaders, their parasites, and the surrounding environment may establish local coevolutionary trajectories for the participants. This can generate variable infection patterns when parasites interact with sympatric versus allopatric hosts. Identifying the potential for such patterns within an invasive-species framework is important for better predicting local infection outcomes and their subsequent impacts on the surrounding native community. Read More

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January 2021

Spatial genetic structure of the invasive tree to determine migration patterns to inform best practices for riparian restoration.

AoB Plants 2020 Oct 24;12(5):plaa043. Epub 2020 Aug 24.

Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho, Matsuyama, Ehime, Japan.

The black locust (Robinieae, Fabaceae) is a common invasive riparian tree in Japan. There are less effective management strategies to remove the tree from the riparian area because of its quickly established high population. We investigated the expansion patterns of through sympatric (i. Read More

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October 2020

Plastic ingestion and dispersion by vultures may produce plastic islands in natural areas.

Sci Total Environ 2021 Feb 21;755(Pt 1):142421. Epub 2020 Sep 21.

Grupo de Investigaciones en Biología de la Conservación, INIBIOMA- CONICET, Universidad Nacional del Comahue, Quintral 1250, R8400FRF San Carlos de Bariloche, Argentina.

Rubbish dumps can become an important environmental source of plastic. Several species feed on organic waste from these sites, but at the same time are exposed to non-organic materials. Species that can gather food in these sites might at the same time disperse waste consumed, but this has rarely been evaluated. Read More

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February 2021

Do annual and perennial populations of an insect-pollinated plant species differ in mating system?

Ann Bot 2020 Oct 9. Epub 2020 Oct 9.

State Key Laboratory of Earth Surface Processes and Resource Ecology and Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University , Beijing,  China.

Background And Aims: Theory predicts that outcrossing should be more prevalent among perennials than annuals, a pattern confirmed by comparative evidence from diverse angiosperm families. However, intraspecific comparisons between annual and perennial populations are few because such variation is uncommon among flowering plants. Here, we test the hypothesis that perennial populations outcross more than annual populations by investigating Incarvillea sinensis, a wide-ranging insect-pollinated herb native to China. Read More

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October 2020

Permethrin Resistance Status and Associated Mechanisms in Aedes albopictus (Diptera: Culicidae) From Chiapas, Mexico.

J Med Entomol 2021 03;58(2):739-748

Arthropod Borne Infectious Disease Laboratory, Colorado State University, Fort Collins, CO.

There are major public health concerns regarding the spread of mosquito-borne diseases such as dengue, Zika, and chikungunya, which are mainly controlled by using insecticides against the vectors, Aedes aegypti (Linnaeus) and Aedes albopictus (Skuse). Pyrethroids are the primary class of insecticides used for vector control, due to their rapid knockdown effect and low toxicity to vertebrates. Unfortunately, continued use of pyrethroids has led to widespread insecticide resistance in Ae. Read More

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Migration, pathogens and the avian microbiome: A comparative study in sympatric migrants and residents.

Mol Ecol 2020 12 19;29(23):4706-4720. Epub 2020 Oct 19.

Movement Ecology Laboratory, Department of Ecology, Evolution and Behavior, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel.

Animals generally benefit from their gastrointestinal microbiome, but the factors that influence the composition and dynamics of their microbiota remain poorly understood. Studies of nonmodel host species can illuminate how microbiota and their hosts interact in natural environments. We investigated the role of migratory behaviour in shaping the gut microbiota of free-ranging barn swallows (Hirundo rustica) by studying co-occurring migrant and resident subspecies sampled during the autumn migration at a migratory bottleneck. Read More

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December 2020

Riverscape genetics in brook lamprey: genetic diversity is less influenced by river fragmentation than by gene flow with the anadromous ecotype.

Heredity (Edinb) 2021 Feb 28;126(2):235-250. Epub 2020 Sep 28.

ESE, Ecology and Ecosystem Health, INRAE, Agrocampus Ouest, 35042, Rennes, France.

Understanding the effect of human-induced landscape fragmentation on gene flow and evolutionary potential of wild populations has become a major concern. Here, we investigated the effect of riverscape fragmentation on patterns of genetic diversity in the freshwater resident European brook lamprey (Lampetra planeri) that has a low ability to pass obstacles to migration. We tested the hypotheses of (i) asymmetric gene flow following water current and (ii) an effect of gene flow with the closely related anadromous river lamprey (L. Read More

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February 2021