Showing 861 - 880 results of 1,425 for search '"habitat fragmentation"', query time: 1.04s Refine Results
  1. 861

    Pattern of genetic differentiation of an incipient speciation process: The case of the high Andean killifish Orestias. by Claudia Jimena Guerrero-Jiménez, Fabiola Peña, Pamela Morales, Marco Méndez, Michel Sallaberry, Irma Vila, Elie Poulin

    Published 2017-01-01
    “…The endemic fish Orestias (Cyprinodontidae) represents a good model to observe the genetic differentiation that characterizes an incipient speciation process in allopatry since the morphospecies described inhabit a restricted geographic area, with present habitat fragmentation. The genetic diversity and population structure of four endemic morphospecies of Orestias (Cyprinodontidae) found in the Lauca National Park (LNP) analyzed with mitochondrial markers (Control Region) and eight microsatellites, revealed the existence of genetic groups that matches the fragmentation of these systems. …”
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  2. 862

    Genetic Patterns and Climate Modelling Reveal Challenges for Conserving <i>Sclerolaena napiformis</i> (Amaranthaceae s.l.) an Endemic Chenopod of Southeast Australia by Michael D. Amor, Neville G. Walsh, Elizabeth A. James

    Published 2020-11-01
    “…There was evidence of regional differentiation that may pre-date (but also may be compounded) by recent habitat fragmentation. We also found significant correlation between genetic and geographic distance when comparing sites across regions. …”
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  3. 863

    Altered natal dispersal at the range periphery: The role of behavior, resources, and maternal condition by Melissa J. Merrick, John L. Koprowski

    Published 2017-01-01
    “…We test for the influence of proximate factors and ultimate drivers of natal dispersal: habitat fragmentation, local population density, individual behavior traits, inbreeding avoidance, competition for mates, and competition for resources, allowing us to better understand altered natal dispersal patterns at the periphery of a species’ range. …”
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  4. 864

    Past and future challenges in managing European seas by Thorsten Blenckner, Andreas Kannen, Alberto Barausse, Christian Fischer, Johanna J. Heymans, Tiziana Luisetti, Valentin Todorova, Matilda Valman, Laurence Mee

    Published 2015-03-01
    “…Marine environments have undergone large-scale changes in recent decades as a result of multiple anthropogenic pressures, such as overfishing, eutrophication, habitat fragmentation, etc., causing often nonlinear ecosystem responses. …”
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  5. 865

    Development and Testing of New Gene-Homologous EST-SSRs for <i>Eucalyptus gomphocephala</i> (Myrtaceae) by Donna Bradbury, Ann Smithson, Siegfried L. Krauss

    Published 2013-07-01
    “…Premise of the study: New microsatellite (simple sequence repeat [SSR]) primers were developed from <i>Eucalyptus</i> expressed sequence tags (ESTs) and optimized for genetic studies of the southwestern Australian tree <i>E. gomphocephala</i>, which is severely impacted by tree health decline and habitat fragmentation. Methods and Results: A total of 133 gene-homologous EST-SSR primer pairs were designed for <i>Eucalyptus</i>, and 44 were screened in <i>E. gomphocephala</i>. …”
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  6. 866

    The Effect of Habitat Amount on Species Richness and Composition of Medium- and Large-Sized Mammals in the Cerrado Biome, Brazil by Ednaldo Cândido Rocha, Amanda Aciely Serafim De Sá, Vagner Santiago do Vale

    Published 2025-01-01
    “…Habitat fragmentation and reduction in the Cerrado are the primary threats to this biome’s biodiversity. …”
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  7. 867
  8. 868

    eEcoLiDAR, eScience infrastructure for ecological applications of LiDAR point clouds: reconstructing the 3D ecosystem structure for animals at regional to continental scales by W. Daniel Kissling, Arie Seijmonsbergen, Ruud Foppen, Willem Bouten

    Published 2017-07-01
    “…This will allow novel insights into the hierarchical structure of animal-habitat associations, into why animal populations decline, and how they respond to habitat fragmentation and ongoing land use change. The processing of these massive amounts of LiDAR point cloud data will be achieved by developing a generic interactive eScience environment with multi-scale object-based image analysis (OBIA) and interpretation of LiDAR point clouds, including data storage, scalable computing, tools for machine learning and visualisation (feature selection, annotation/segmentation, object classification, and evaluation), and a PostGIS spatial database. …”
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  9. 869

    Limited Pollen Dispersal Contributes to Population Genetic Structure but Not Local Adaptation in Quercus oleoides Forests of Costa Rica. by Nicholas John Deacon, Jeannine Cavender-Bares

    Published 2015-01-01
    “…Despite environmental heterogeneity and habitat fragmentation, isolation-by-distance and isolation-by-environment alone do not explain spatial genetic structure. …”
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  10. 870

    Diversity of <i>Leptogium</i> (Collemataceae, Ascomycota) in East African Montane Ecosystems by Ulla Kaasalainen, Veera Tuovinen, Paul M. Kirika, Neduvoto P. Mollel, Andreas Hemp, Jouko Rikkinen

    Published 2021-02-01
    “…Many of the species were only found from specific ecosystems and/or restricted habitats and are thus threatened by ongoing habitat fragmentation and degradation of the natural environment. …”
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  11. 871

    Genetic diversity and structure analysis of the endangered plant species Horsfieldia hainanensis Merr. in China by Yinghong Jiang, Xiongsheng Liu, Wenhua Xiang, Yi Jiang, Yinghui He

    Published 2018-01-01
    “…Collectively, we speculated that habitat fragmentation and disturbance from human activities could be considered the main reasons for the endangerment of H. hainanensis, and we propose in situ conservation for the existing natural H. hainanensis populations, especially at Mengtun, Niandou and Tongbiguan, where the genetic diversity is relatively high.…”
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  12. 872

    An assessment of a conservation strategy to increase garden connectivity for hedgehogs that requires cooperation between immediate neighbours: A barrier too far? by Abigail Gazzard, Anne Boushall, Emma Brand, Philip J. Baker

    Published 2021-01-01
    “…Urban areas are associated with high levels of habitat fragmentation. For some terrestrial species with limited climbing abilities, property boundaries can pose a significant problem by limiting access to residential gardens. …”
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  13. 873

    Testing the effect of the Himalayan mountains as a physical barrier to gene flow in Hippophae tibetana Schlect. (Elaeagnaceae). by La Qiong, Wenju Zhang, Hao Wang, Liyan Zeng, H John B Birks, Yang Zhong

    Published 2017-01-01
    “…At a fine scale, spatial autocorrelation analysis suggests significant genetic structure within a distance of less than 45 m, which may be attributed mainly to vegetative reproduction and habitat fragmentation, as well as limited gene flow.…”
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  14. 874

    Trends and biases in research efforts for primate conservation: threatened species are not in the spotlight by Flávia de Figueiredo Machado, Barbbara Silva Rocha, Daniel Brito, Levi Carina Terribile

    Published 2023-10-01
    “…We found that the highest number of studies was about habitat fragmentation. Madagascar, Indonesia, and Brazil concentrated most of the studies. …”
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  15. 875

    Local variation in stress response of juvenile anadromous brown trout, Salmo trutta by Madeleine Berry, Lucas A. Zena, Jonathan A. C. Roques, Erik Sandblom, Eva B. Thorstad, Johan Höjesjö

    Published 2024-06-01
    “…Abstract Habitat fragmentation may cut off anadromous salmonids from parts of their potential native habitat and separate previously connected populations. …”
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  16. 876

    Dispersal Ecology Informs Design of Large-Scale Wildlife Corridors. by Robin A Benz, Mark S Boyce, Henrik Thurfjell, Dale G Paton, Marco Musiani, Carsten F Dormann, Simone Ciuti

    Published 2016-01-01
    “…The way in which movement among populations is affected by environmental conditions is important for predicting the effects of habitat fragmentation, and for defining conservation corridors. …”
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  17. 877

    Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada by Keri McFarlane, Anne Gunn, Mitch Campbell, Mathieu Dumond, Jan Adamczewski, Greg Wilson

    Published 2016-05-01
    “…These data can also be used as a benchmark to compare the effects of habitat fragmentation and bottlenecks on other large caribou populations.…”
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  18. 878

    A Gundi in the Fezzan, Southern Libya by Tiziano Londei

    Published 2008-07-01
    “…The Fezzan has been judged a favourable region for rodent endemism because of habitat fragmentation. Although gundis look like ecologically versatile biogeographical relicts, the study of isolated populations might make unexpected differences emerge from among similarities of a more ancient origin.&#13; &#13; &lt;strong&gt;Riassunto&lt;/strong&gt;&#13; &lt;strong&gt;Un gundi in Fezzan, Libia meridionale.…”
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  19. 879

    Opportunities of habitat connectivity for tiger (Panthera tigris) between Kanha and Pench National Parks in Madhya Pradesh, India. by Chinmaya S Rathore, Yogesh Dubey, Anurag Shrivastava, Prasad Pathak, Vinayak Patil

    Published 2012-01-01
    “…Of the number of factors attributed to this decline, habitat fragmentation has been the most worrisome. Wildlife corridors have long been a subject of discussion amongst wildlife biologists and conservationists with contrasting schools of thought arguing their merits and demerits. …”
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  20. 880

    Assessing the efficacy of protected and multiple-use lands for bird conservation in the U.S. by L Lynnette Dornak, Jocelyn L Aycrigg, John Sauer, Courtney J Conway

    Published 2020-01-01
    “…Our results may be influenced by external pressures (e.g., habitat fragmentation), the size of protected lands, the high mobility of birds that allows them to use a combination of all land categories, and management strategies that result in similar habitat between protected and multiple-use lands, or our approach to detect limited relationships. …”
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