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67 results for “floristic data”
Data from: Differential patterns of floristic phylogenetic diversity across a post-glacial landscape
<p>Abstract: Aim: In this study, we explored spatial patterns of phylogenetic diversity and endemism in the flora of Norway and tested hypothesized post-glacial environmental drivers of phylogenetic diversity, including temperature, precipitation, edaphic factors, and time since glacial retreat.<br> <br> Location: Norway.<br> <br> Taxon: Vascular plants (Trachaeophyta).<br> <br> Methods: We produced a multi-locus Maximum Likelihood (ML) phylogeny using a combination of newly produced DNA sequences from herbarium specimens and sequences available from public repositories. We combined the phylogeny with species occurrence data to estimate phylogenetic diversity and phylogenetic endemism across Norway, using a spatial randomization to judge statistical significance. We used multiple-model inference to identify environmental variables that contributed the most to the patterns of phylogenetic diversity. Finally, we estimated phylogenetic turnover and used this to identify Norwegian plant assemblages in terms of composition and evolutionary history.<br> <br> Results: Our ML phylogeny contained 87% of all currently described native Norwegian vascular plants. Assemblages were phylogenetically overdispersed in warmer and wetter regions of Norway, as well as in regions with a longer post-glacial history. In cold and dry regions, plant assemblages were phylogenetically clustered, and characterised by neo-endemism, while the mild and wet regions were characterised by both paleo- and neo-endemism. Phylogenetic diversity was positively correlated with summer temperature and habitat heterogeneity, and peaked in the southeast of Norway.<br> <br> Main conclusions: Both contemporary ecological factors (climate and habitat heterogeneity), and post-glacial history seem to have shaped the phylogenetic structure of the flora of Norway. The flora in the far north of Norway appear to be a result of recent diversification while the coastal regions are assemblages of deeper lineages. Our results suggest that there is an evolutionary signal in the distribution of the Norwegian vascular flora.</p>
Data and code for publication: "Floristic Patterns in the Andes of Northern Patagonia's Forests"
<p>This dataset supports the study "Floristic Patterns in the Andes of <br>Northern Patagonia's Forests" published in Vegetation Classification and Survey, which<br>investigates the relationship between plant communities and environmental drivers in <br>the Andes of northwest Patagonia, Argentina. It also employs both expert-based and <br>numerical classification methods to explore floristic patterns across steep gradients <br>of aridity and temperature. The project provides a detailed dataset of 141 vegetation <br>samples, using advanced statistical methods to define six distinct plant communities <br>and their environmental drivers. It aims to refine existing vegetation classifications <br>for the study area and inform conservation efforts.</p>
Data from: Differential patterns of floristic phylogenetic diversity across a post‐glacial landscape
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Data for: Floristic changes following the chestnut blight may be delayed for decades
<p>A survey conducted in the 1920s, prior to the chestnut blight, indicated that chestnuts and oaks were codominant canopy species in White Oak Canyon, Shenandoah National Park, Virginia. A second survey in 1977 suggested that chestnuts were being replaced by tree species present before the blight, particularly oaks. In 2021, we resurveyed the 10 sites included in our 1977 survey and also recorded canopy and understory trees that grew above remnant chestnut sprouts. The canopy changed more substantially during the second interval (since 1977). Birch and maples were now more abundant and species less tolerant of shade were generally better represented in the canopy. Hemlock declined, and oaks were less common in the canopy. Chestnut sprouts have become much less common since 1977, presumably as repeated cycles of diebacks have weakened rootstocks. Those sites where chestnut sprouts have persisted until 2021 differed from neighboring sites without them. Chestnut sprouts were rare in sites with birch and hemlock; chestnut has persisted in locations with red oaks in the canopy and with few other understory competitors. This survey has been conducted over a longer time interval than previous studies that asked similar questions and our results suggest that changes to the forest composition following the loss of the American chestnut may be greater than previously recognized although the relative contribution of losing this codominant species is unclear.</p>
Data from: A millennium of climatic and floristic dynamics in the Eastern Cordillera of the Colombian Andes
<p><span>The transition from the Medieval Climate Anomaly (MCA, 950-1250 CE) to the Little Ice Age (LIA, 1350 to 1800 CE) is the largest pre-industrial climate shift within the last two millennia, offering an opportunity to study how vegetation responds to rapid climate change. We analyzed a sedimentary record from the Colombian Andes to reconstruct regional vegetation dynamics during this time interval, identify the modern environmental distribution of taxa present in the fossil record, and provide a reference for modern regional temperature change.</span> <span>A sediment core was analyzed for organic geochemistry and pollen to reconstruct environmental and vegetation variability between 800 and 1800 CE. Modern occurrences of individuals of the genera found in the fossil record were used to model the distribution of taxa across gradients of mean annual temperature and precipitation. These models were used to reconstruct temperature and precipitation across time and evaluate the probability of occurrence of taxa from the fossil record across the contemporary landscape. </span><span> </span><span>Reconstructed regional vegetation dynamics were highly coupled with global temperature patterns. Reconstructed climate showed that conditions were warm and dry during the MCA, and cold and relatively wet during the LIA, although quantitative estimations might have been amplified by human disturbances. Rates of temperature change during the MCA-LIA transition were substantially lower than those calculated for the last two decades. Vegetation turnover between 800 and 1800 CE resembled those expressed through a transect extending ~30 km southeast from the lake.</span><span> Around lake Tota, modern rates of temperature change have no precedent within the last two millennia. The modern environmental affinities of taxa involved in vegetation turnover during the MCA-LIA transition point to the importance of landscape diversity and connectivity for rapid vegetation response to climate change.</span></p>
Fig. 11 - Trachelium caeruleum L in New floristic data of vascular plants from central Italy
Fig. 11 - Trachelium caeruleum L. subsp. caeruleum. (Photo / Foto F. Bartolucci).
Fig. 9 in New floristic data of vascular plants from central Italy
Fig. 9 - Iris pallida Lam. (Photo / Foto F. Falcinelli).
Fig. 10 - Opuntia scheerii F.A.C in New floristic data of vascular plants from central Italy
Fig. 10 - Opuntia scheerii F.A.C.Weber. (Photo / Foto F. Conti).
Fig. 8 - Cotoneaster lacteus W.W in New floristic data of vascular plants from central Italy
Fig. 8 - Cotoneaster lacteus W.W.Sm. (Photo / Foto F. Falcinelli).
Fig. 1 - Astragalus exscapus L in New floristic data of vascular plants from central Italy
Fig. 1 - Astragalus exscapus L. subsp. exscapus. (Photo / Foto F. Falcinelli).
Fig. 6 - Oxytropis ocrensis F in New floristic data of vascular plants from central Italy
Fig. 6 - Oxytropis ocrensis F.Conti & Bartolucci. (Photo / Foto F. Conti).
Fig. 2 in New floristic data of vascular plants from central Italy
Fig. 2 - Calendula tripterocarpa Rupr. (Photo / Foto F. Conti).
Fig. 7 - Salix pentandra L in New floristic data of vascular plants from central Italy
Fig. 7 - Salix pentandra L. (Photo / Foto F. Conti).
Fig. 3 in New floristic data of vascular plants from central Italy
Fig. 3 - Cytisus villosus Pourr. (Photo / Foto F. Falcinelli).
Data from: High vascular plant species richness in the Usumacinta River Basin: a comprehensive floristic checklist for a natural region in the Mesoamerican biodiversity hotspot
<p><span>Background: </span><span>Mesoamerica is one of the most important biodiversity hotspots on the planet. Despite significant efforts made over two centuries to contribute to the floristic knowledge of this region, our understanding of its flora is still scattered and uneven.</span></p> <p><span>Questions:</span> <span>What is the magnitude of the vascular plant species richness in the Usumacinta River Basin?</span></p> <p><span>Study site and dates: </span><span>Usumacinta River Basin (Guatemala and Mexico), 1838–2018.</span></p> <p><span>Methods: </span><span>We compiled the checklist by systematizing the floristic information acquired from various sources derived from numerous floristic and ecological studies.</span></p> <p><span>Results:</span><span> W</span><span>e recorded 6,977 species, 1,892 genera, and 274 families. The largest numbers of species (5,746) and records (58,859) correspond to the Mexican portion of the Usumacinta River Basin, compared to its Guatemalan counterpart (4,445 species and 19,952 records). The most species-rich families were Orchidaceae (598 species), Fabaceae (512), and Asteraceae (476). The prevalence of these and all other families with significant contributions to the flora varied among three elevation-defined sectors into which the Usumacinta River Basin was subdivided (lower, middle, and upper basin).</span></p> <p><span>Conclusions: </span><span>The Usumacinta River Basin is a strategic region for plant biodiversity conservation as it hosts almost one-third of all vascular plant species known for Mesoamerica and ca. 6 % of the entire flora in the Americas. Further botanical exploration should focus on those areas of the basin for which little or no information is available in order to gain a better appreciation of its flora.</span></p>
Data for: Floristic changes following the chestnut blight may be delayed for decades
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Data from: Floristic and structural heterogeneity in a Neotropical riparian wetland: Conservation implications
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Data from: Biogeographic history and habitat specialisation shape floristic and phylogenetic composition across Amazonian forests
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Data from: Rarity, geography, and plant exposure to global change in the California Floristic Province
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Data from: The evolutionary history of the ancient weevil family Belidae (Coleoptera: Curculionoidea) reveals the marks of Gondwana breakup and major floristic turnovers, including the rise of angiosperms
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Allen Brain Atlas
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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.