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49 results for “keystone species”
DNA-metabarcoding reveals the importance of gelatinous zooplankton in the diet of Pandalus borealis, a keystone species in the Arctic
<p>Information about the dietary composition of species is crucial to understand their position and role in the food web. Stomach content analysis (SCA) and stable isotope analysis (SIA) are commonly used to study marine trophic relationships. SCA can provide high taxonomic resolution but requires taxonomic expertise and frequently underestimates digestible taxa. SIA provides a time-integrated view of the dietary sources but often lacks in taxonomic resolution. The use of molecular approaches such as DNA-metabarcoding may alleviate these problems. Here, we used DNA-metabarcoding with universal primers for cytochrome c oxidase I (COI), to study the diet composition of the Northern shrimp (<i>Pandalus borealis</i>) from the Barents Sea, a keystone species in the Arctic region with large socio-economic importance. Across locations, jellyfish and chaetognaths were the most important components in the diet of <i>P. borealis</i>, jointly accounting for 40-60% of the total read abundance. This dietary importance of gelatinous zooplankton contrasts sharply with published results based on SCA. At the same time, diet composition differed between fjord and shelf locations, pointing to different food webs supporting <i>P. borealis</i> in these two systems. Our study underscores the potential of molecular approaches to provide important new insights into the diet of marine invertebrates that are difficult or impossible to obtain with traditional methods, and calls for a revision of the role of gelatinous zooplankton in the diet of the key Arctic species <i>P. borealis</i>, and in extension, Arctic food webs.</p>
What feeds on Quercus ilex L.? A biogeographical approach to studying trophic interactions in a Mediterranean keystone species
<p>Holm oak (<i>Quercus ilex</i> L.) is regarded as a keystone plant species. Although trophic interactions may affect the phytophagous species distribution and abundance, the number of arthropod species using holm oak as a food resource and their levels of host specificity is not yet known. Here we aim to quantify these species, their feeding strategies and conservation status, investigate the taxonomic relatedness in each trophic guild and assess their degree of host specificity with the holm oak.<span>We reviewed the existing literature and compiled information about all arthropod species that feed on <i>Q. ilex</i>, as well as their feeding strategies and conservation status. We also investigated the relationships between trophic guilds and the taxonomic relatedness of species and assessed the degree of climatic niche overlap with holm oak. We found that 605 species feed on seven different parts of the holm oak plant (<i>i.e</i>., feeding strategies). More than 90% of these species lack a conservation status assessment and eight are threatened by human activities, either as vulnerable, endangered, or critically endangered. A significant phylogenetic relationship was found between taxonomic relatedness and groups of arthropods that feed on the same part of the plant (<i>i.e</i>., trophic guilds). Twenty percent of the species had similar niches, thereby indicating the potentially high host dependence of these species. </span>This study highlights the significance of a keystone tree species for arthropod conservation and the need for further research into the distribution and conservation status of arthropod species in Mediterranean holm oak woodlands.</p>
Data from: The contrasting roles of host species diversity and parasite population genetic diversity in the infection dynamics of a keystone parasitic plant
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Data from: Rapid genetic restoration of a keystone species exhibiting delayed demographic response
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What feeds on Quercus ilex L.? A biogeographical approach to studying trophic interactions in a Mediterranean keystone species
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DNA-metabarcoding reveals the importance of gelatinous zooplankton in the diet of Pandalus borealis, a keystone species in the Arctic
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Supporting Files for Schiebelhut LM, Puritz JB & Dawson MN (2018) "Decimation by sea star wasting disease and rapid genetic change in a keystone species, Pisaster ochraceus" PNAS
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Figure 1 in Review of the interactions of an ecological keystone species, Aechmea distichantha Lem. (Bromeliaceae), with the associated fauna
Figure 1. Aechmea distichantha has (a) terrestrial and (b) epiphytic habits. (c) Its leaf axils are inhabited by vertebrates. (d) Pollinators visit their inflorescences and (e) some animal species construct their nests and lay their eggs protected beneath the spiny leaves in the inter-ramet space.
Cystic Fibrosis Keystone Species
GEO Series GSE139943. Homo sapiens. 9 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.