2,442 results match your criteria: "Natural History Museum of Denmark; Universitetsparken 15; Copenhagen; Denmark.. perkovsk@gmail.com.[Affiliation]"

Species-specific traits mediate avian demographic responses under past climate change.

Nat Ecol Evol

June 2023

Center for Macroecology, Evolution, and Climate, The Globe Institute, University of Copenhagen, Copenhagen, Denmark.

Anticipating species' responses to environmental change is a pressing mission in biodiversity conservation. Despite decades of research investigating how climate change may affect population sizes, historical context is lacking, and the traits that mediate demographic sensitivity to changing climate remain elusive. We use whole-genome sequence data to reconstruct the demographic histories of 263 bird species over the past million years and identify networks of interacting morphological and life history traits associated with changes in effective population size (N) in response to climate warming and cooling.

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Gut microbial communities are complex and heterogeneous and play critical roles for animal hosts. Early-life disruptions to microbiome establishment can negatively impact host fitness and development. However, the consequences of such early-life disruptions remain unknown in wild birds.

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Ancient DNA from a lost Negev Highlands desert grape reveals a Late Antiquity wine lineage.

Proc Natl Acad Sci U S A

April 2023

The Steinhardt Museum of Natural History and Israel National Center for Biodiversity Studies, Tel Aviv University, Tel Aviv 6997801, Israel.

Recent excavations of Late Antiquity settlements in the Negev Highlands of southern Israel uncovered a society that established commercial-scale viticulture in an arid environment [D. Fuks , , 19780-19791 (2020)]. We applied target-enriched genome-wide sequencing and radiocarbon dating to examine grapevine pips that were excavated at three of these sites.

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Barton . raise several statistical concerns regarding our original analyses that highlight the challenge of inferring natural selection using ancient genomic data. We show here that these concerns have limited impact on our original conclusions.

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Article Synopsis
  • - Tropical islands serve as crucial sites for studying evolution, particularly in understanding how species colonize, diversify, and go extinct in unique ecosystems.
  • - The island thrush, a highly variable songbird, is one of the largest examples of an island radiation, showcasing significant plumage differences and a wide geographical distribution across the Indo-Pacific.
  • - Research utilizing genetic data indicates that the island thrush evolved from migratory ancestors and rapidly spread during the Pleistocene, raising questions about its movement patterns and adaptations to various environments in the region.
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We report the first chromosome-length genome assemblies for three species in the mammalian order Pholidota: the white-bellied, Chinese, and Sunda pangolins. Surprisingly, we observe extraordinary karyotypic plasticity within this order and, in female white-bellied pangolins, the largest number of chromosomes reported in a Laurasiatherian mammal: 2n = 114. We perform the first karyotype analysis of an African pangolin and report a Y-autosome fusion in white-bellied pangolins, resulting in 2n = 113 for males.

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Genetic factors predict hybrid formation in the British flora.

Proc Natl Acad Sci U S A

April 2023

Institute of Ecology and Evolution, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom.

Natural hybridization can have a profound evolutionary impact, with consequences ranging from the extinction of rare taxa to the origin of new species. Natural hybridization is particularly common in plants; however, our understanding of the general factors that promote or prevent hybridization is hampered by the highly variable outcomes in different lineages. Here, we quantify the influence of different predictors on hybrid formation across species from an entire flora.

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Resolving the evolutionary history of organisms is a major goal in biology. Yet for some taxa the diversity, phylogeny, and even adult stages remain unknown. The enigmatic crustacean "y-larvae" (Facetotecta) are one particularly striking example.

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Genomics of adaptive evolution in the woolly mammoth.

Curr Biol

May 2023

Centre for Palaeogenetics, 10691 Stockholm, Sweden; Department of Zoology, Stockholm University, 10691 Stockholm, Sweden; Department of Bioinformatics and Genetics, Swedish Museum of Natural History, 10405 Stockholm, Sweden. Electronic address:

Article Synopsis
  • Scientists studied 23 woolly mammoth genomes to learn how these creatures adapted over time, even looking at one that was 700,000 years old.
  • They found that the woolly mammoth already had many important genes for things like hair, fat storage, and its immune system when it first appeared.
  • The research shows that different genes helped the woolly mammoth change during its long existence, including some that affected its size and ear shape in later years.
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Domesticated yaks endure as iconic symbols of high-altitude frozen landscapes, where herding communities depend on their high-fat milk, transport, dung, and natural fibers. While there is established proteomic evidence for ancient consumption of ruminant and horse milk in the mountains and steppes of northern Eurasia, yak dairy products have yet to be detected. Yak domestication and the species' dispersal from Tibet into the mountainous zones to the north are also poorly resolved due to a paucity of zooarchaeological data.

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The ecology of extinct species from the Cretaceous is largely unknown. Morphological features of specimens preserved in amber can help to reveal habitats and evolutionary strategies that occurred in fossil lineages. An unusually small rove beetle (Staphylinidae) from the subfamily Paederinae with a Y-shaped suture on the head and modified tarsi and antennae is newly described here as Midinudon juvenis Tokareva & Żyła gen.

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Early dispersal of domestic horses into the Great Plains and northern Rockies.

Science

March 2023

Centre for Anthropobiology and Genomics of Toulouse (CAGT, CNRS UMR5288), University Paul Sabatier, Faculté de Médecine Purpan, 31000 Toulouse, France.

Article Synopsis
  • Horses played a crucial role in Indigenous cultures in the American Southwest and Great Plains, but the timeline and methods of their integration remain debated.
  • A study analyzing historic horse remains combined genomic, isotopic, and other evidence, revealing strong genetic ties to Iberian horses, with later British influences.
  • By the early 17th century, horses were widely adopted in Indigenous societies, impacting herd management, ceremonies, and cultural practices before European observers arrived in the 18th century.
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Research on island species-area relationships (ISAR) has expanded to incorporate functional (IFDAR) and phylogenetic (IPDAR) diversity. However, relative to the ISAR, we know little about IFDARs and IPDARs, and lack synthetic global analyses of variation in form of these three categories of island diversity-area relationship (IDAR). Here, we undertake the first comparative evaluation of IDARs at the global scale using 51 avian archipelagic data sets representing true and habitat islands.

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Historically, the seals and harbour porpoises of the Baltic Sea and North Sea have been subjected to hunting, chemical pollutants and repeated mass mortalities, leading to significant population fluctuations. Despite the conservation implications and the zoonotic potential associated with viral disease outbreaks in wildlife, limited information is available on the circulation of viral pathogens in Baltic Sea seals and harbour porpoises. Here, we investigated the presence of the influenza A virus (IAV), the phocine distemper virus (PDV) and the cetacean morbillivirus (CeMV) in tracheal swabs and lung tissue samples from 99 harbour seals, 126 grey seals, 73 ringed seals and 78 harbour porpoises collected in the Baltic Sea and North Sea between 2002-2019.

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Adaptation is the central feature and leading explanation for the evolutionary diversification of life. Adaptation is also notoriously difficult to study in nature, owing to its complexity and logistically prohibitive timescale. Here, we leverage extensive contemporary and historical collections of Ambrosia artemisiifolia-an aggressively invasive weed and primary cause of pollen-induced hayfever-to track the phenotypic and genetic causes of recent local adaptation across its native and invasive ranges in North America and Europe, respectively.

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"Type D" killer whale genomes reveal long-term small population size and low genetic diversity.

J Hered

April 2023

Marine Mammal and Turtle Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanographic and Atmospheric Administration, La Jolla, CA, United States.

Genome sequences can reveal the extent of inbreeding in small populations. Here, we present the first genomic characterization of type D killer whales, a distinctive eco/morphotype with a circumpolar, subantarctic distribution. Effective population size is the lowest estimated from any killer whale genome and indicates a severe population bottleneck.

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Biodiversity of hymenopteran parasitoids.

Curr Opin Insect Sci

April 2023

Natural History Museum of Denmark, SCIENCE, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen Ø, Denmark.

Parasitoid wasps are the most successful group of insect parasitoids, comprising more than half the known diversity of Hymenoptera and probably most of the unknown diversity. This lifestyle has enabled them to be used as pest control agents conferring substantial economic benefits to global agriculture. Major lineages of parasitoid wasps include Ichneumonoidea, Ceraphronoidea, Proctotrupomorpha, and a number of aculeate families.

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The Andean fever tree ( L.; Rubiaceae) is a source of bioactive quinine alkaloids used to treat malaria. Vahl is a valuable cash crop within its native range in northwestern South America, however, genomic resources are lacking.

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Article Synopsis
  • The research investigates how environmental factors influence species diversity in tropical ecosystems, focusing on the isolated herpetofauna of Amber Mountain in Madagascar.
  • The study found a peak in species richness at around 1000 meters above sea level, with a significant number of local endemic species appearing at higher elevations.
  • Genetic analysis of chameleons and frogs revealed patterns of divergence with altitude, suggesting that both ecological and geographical factors contribute to speciation processes in Madagascar's unique biodiversity.
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Phylogenomics and biogeography of arid-adapted Chlamydogobius goby fishes.

Mol Phylogenet Evol

May 2023

School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia. Electronic address:

The progressive aridification of the Australian continent from ∼ 20 million years ago posed severe challenges for the persistence of its resident biota. A key question involves the role of refugial habitats - specifically, their ability to mediate the effects of habitat loss and fragmentation, and their potential to shape opportunities for allopatric speciation. With freshwater species, for example, the patchiness, or absence, of water will constrain distributions.

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Symptoms of Major Depressive Disorder (MDD) are commonly assessed using self-rating instruments like the Patient Health Questionnaire 9 (PHQ9, for current symptoms), and the Composite International Diagnostic Interview Short-Form (CIDI-SF, for lifetime worst-episode symptoms). Using data from the UKBiobank, we show that corresponding symptoms endorsed through PHQ9 and CIDI-SF have low to moderate genetic correlations (rG=0.43-0.

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Although the Holarctic fauna has been explored for centuries, many questions on its formation are still unanswered. For example, i) what was the impact of the uplift of the Himalaya and Tibetan Plateau?, ii) what were the timings and climate of the faunal bridges connecting the Nearctic and Palearctic regions?, and iii) how did insect lineages respond to the late Paleogene global cooling and regional aridification? To answer these, we developed a phylogenetic dataset of 1229 nuclear loci for a total of 222 species of rove beetles (Staphylinidae) with emphasis in the tribe Quediini, especially Quedius-lineage and its subclade Quedius sensu stricto. Using eight fossils for calibrating molecular clock, we estimated divergence times and then analysed in BioGeoBEARS paleodistributions of the most recent common ancestor for each target lineage.

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Viet Nam has a coastline of 3200 km with thousands of islands providing diverse habitats for benthic harmful algal species including species of Gambierdiscus. Some of these species produce ciguatera toxins, which may accumulate in large carnivore fish potentially posing major threats to public health. This study reports five species of Gambierdiscus from Vietnamese waters, notably G.

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