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2,399 results for “Fragmentation”
Data in Support of Effects of Urbanization and Forest Fragmentation on Atmospheric Nitrogen Inputs and Ambient Nitrogen Oxide and Ozone Concentrations in Mixed Temperate Forests.
Urban ecosystems around the globe experience greater atmospheric nitrogen (N) deposition compared to rural areas and are particularly vulnerable to fragmentation due to land-use change. However, while the influences of urbanization and forest fragmentation on atmospheric inputs to temperate forests have been determined separately, the combined effects of the two changes on temperate forest ecosystems have yet to be assessed. To investigate these combined effects, we deployed throughfall collectors to measure atmospheric N inputs and passive samplers to measure nitrogen oxides (NOx) and ozone (O3) throughout the 2018 and 2019 growing seasons in seven temperate forest sites along an urbanization gradient from Boston to central Massachusetts. We found a positive relationship between the amount of impervious surface area surrounding each site (% ISA) and throughfall nitrate (NO3-) inputs at the forest edge, with urban edge NO3- inputs nearly double the rate at rural edge sites. There were higher rates of NO3- inputs in the rural forest interior than edge sites. Urban sites experienced significantly higher concentrations of NOx and O3 both in the interior and at the edge compared to rural sites. Atmospheric N inputs were significantly elevated in the early (May-July) compared to the late (August-November) growing season and concentrations of NOx and O3 were also elevated in the mid-growing season (June-September). Our results demonstrate that together, urbanization and forest fragmentation lead to greater rates of atmospheric N inputs and ambient pollutant concentrations of NOx and O3 in temperate forests of the northeastern U.S.
Habitat fragmentation mite data, South Carolina, 2018
These csv files contain mite abundance and richness data, fungal abundance data, and leaf characteristics used in the paper "The impact of habitat fragmentation on domatia-dwelling mites and a mite-plant-fungus tritrophic interaction" published in Landscape Ecology in 2022. The project was conducted at the Savannah River Site, near Aiken, South Carolina, United States during the summer of 2018. The goal of the project was to assess the impacts of landscape-level habitat fragmentation on communities of mites and fungi on leaf surfaces growing on Quercus nigra oak trees within landscape patches. To investigate this, we counted and morphotyped mites found on leaves taken from oaks located in habitat patches manipulated to have different edge-to-area ratios and connectivity statuses. We also manipulated mite access to domatia on oak leaves using a tar treatment, and assessed whether mite exclusion and landscape fragmentation variables influenced levels of fungal hyphae on oak leaves. We found a significant positive effect of patch edge proximity on mite abundance and richness, as well as fungal hyphae abundance, indicating that landscape-level habitat fragmentation can impact microscopic foliar communities.
Seed dispersal data for Warneke et al "Habitat fragmentation alters the distance of abiotic seed dispersal through edge effects and direction of dispersal"
This csv file contains seed dispersal data for five species (Carphephorus bellidifolius, Aristida beyrichiana, Liatris squarrulosa, Sorghastrum secundum, and Anthenantia villosa). Data were collected at the Savannah River Site, near Aiken, South Carolina, United States. Data were collected between November 17, 2009, to January 22, 2010 and were collected using the methods outlined in this document.
སྐར་ཅུང། Skar Cung. Fragment of 円瓦当.
<p>སྐར་ཅུང། Skar Cung. Fragment of 円瓦当.</p>
Mahurjhari or Mahurzari महुरझरी (Maharashtra). Carnelian bead fragments in fields at village.
<p>Mahurjhari or Mahurzari महुरझरी (Maharashtra). Carnelian bead fragments in fields at village.</p>
Itarsi (इटारसी, Sehore District) Madhya Pradesh. Architectural fragment with a seated Ācārya
<p>Itarsi (इटारसी, Sehore District) Madhya Pradesh. Architectural fragment with a seated Ācārya</p>
Fig. 2 in Autumn habitat selection of the harvest mouse (Micromys minutus Pallas, 1771) in a rural and fragmented landscape
Fig. 2. Map representing the study area and the different habitat types present in it. The Caricteum acutiformis patch in the North is the main tall sedge meadow, where most of the study was conducted. The transects (red lines) shown on this map were the ones used for trapping (i.e., for the Capture, Mark and Release event).
Fig. 7 in Autumn habitat selection of the harvest mouse (Micromys minutus Pallas, 1771) in a rural and fragmented landscape
Fig. 7. Relocations of the four male individuals M1, M2, M3 and M4. M1 was tracked from the 19th to the 21th of September 2017. M2 was tracked from the 06th to the 10th of October 2017. M3 was tracked from the 15th to the 19th of October 2017. M4 was tracked from the 15th to the 17th of October 2017.
Supplementary material for the paper "Geologically old but freshly exposed rock fragments encountered by Yutu-2 rover"
<p>The derived data presented in figures 6 and 8, and the image IDs for producing figures 1, 2, 3/4, 5, and 7 in the paper "Geologically old but freshly exposed rock fragments encountered by Yutu-2 rover" are available in this data repository.</p>
Loss and fragmentation of fire-resistent primary forest cover in Sumatra and Kalimantan
<p>Here we share primary forest loss and fire occurrence in Sumatra and Kalimantan covering 2001 through 2019 period. The datasets include primary forest cover fraction and active fire detection counts at 1km spatial resolution and annual time step.</p> <p>For details on the datasets see included README file and the following open access publication:</p> <p>Nikonovas <em>et al</em>., Near-complete loss of fire-resistant primary tropical forest cover in Sumatra and Kalimantan,<em> Communs Earth and Environ., <strong>1</strong>, (2020).</em></p> <p>Usage Notes</p> <p>Contact Tadas Nikonovas (tadas.nik@gmail.com) for questions on usage or additional details.</p> <p> </p> <p>Acknowledgements</p> <p>This study forms part of the Towards a Fire Early Warning System for Indonesia (ToFEWSI) project (Oct. 2017- Oct. 2021), which is funded through the UK’s National Environment Research Council – Newton Fund on behalf of UK Research & Innovation (NE/P014801/1), Indonesia Endowment Fund for Education and the Indonesian Science Fund (Principal Investigators: Allan Spessa (UK) and Muhammad Ali Imron (Indonesia)). The ToFEWSI project is developing a suite of climate, hydrological- and agent-based models to predict the incidence of peat forest fires in Indonesia, plus new evidence-based proposals for managing fires in Indonesia.</p> <p> </p>
Mesocoms investigation of seaweed fragment degradation and skinking rates
<p>This dataset provides the results of a 35 day investigation of macroalgal fragment degradation and sinking rates, that took place in late summer and autumn of 2017, in Plymouth Marine Laboratory, UK. Specimens were collected by hand, from the shore at Rame Head (50°18' 41.9″ N 4°13' 15.9″ W). Sinking rates were estimated in a stationary seawater column in the laboratory, and are provided against fragment weight for 3 species of macroalgae, at the beginning and end of incubations. Experimental conditions are described.</p>
Data from: Drift happens: molecular genetic diversity and differentiation among populations of jewelweed (Impatiens capensis Meerb.) reflect fragmentation of floodplain forests
Landscape features often shape patterns of gene flow and genetic differentiation in plant species. Populations that are small and isolated enough also become subject to genetic drift. We examined patterns of gene flow and differentiation among 12 floodplain populations of the selfing annual jewelweed (Impatiens capensis Meerb.) nested within four river systems and two major watersheds in Wisconsin, USA. Floodplain forests and marshes provide a model system for assessing the effects of habitat fragmentation within agricultural/urban landscapes and for testing whether rivers act to genetically connect dispersed populations. We generated a panel of 12,856 single nucleotide polymorphisms and assessed genetic diversity, differentiation, gene flow, and drift. Clustering methods revealed strong population genetic structure with limited admixture and highly differentiated populations (mean multilocus FST = 0.32, FST' = 0.33). No signals of isolation by geographic distance or environment emerged, but alleles may flow along rivers given that genetic differentiation increased with river distance. Differentiation also increased in populations with fewer private alleles (R2 = 0.51) and higher local inbreeding (R2 = 0.22). Populations varied greatly in levels of local inbreeding (FIS = 0.2 to 0.9) and FIS declined in smaller, more isolated populations. These results suggest that genetic drift dominates other forces in structuring these Impatiens populations. In rapidly changing environments, species must migrate or genetically adapt. Habitat fragmentation limits both processes, potentially compromising the ability of species to persist in fragmented landscapes.
Data and modeling results for publication: Landscape genetics indicate recently increased habitat fragmentation in African forest-associated chafers
<ul> <li>DNA sequences: <em>cox1</em> and ITS1 alignments</li> <li>spatial records (in hypervolume archive)</li> <li>spatial principal component 1-3 used for <em>hypervolume</em> models (in hypervolume archive)</li> <li>Present and past species distribution models (SDMs): <ul> <li><em>biomod2</em> ensemble SDMs <ul> <li>Present</li> <li>Holocene Altithermal</li> <li>Last Glacial Maximum</li> </ul> </li> <li><em>biomod2</em> SDMs for single PMIP3 models <ul> <li>Present</li> <li>Holocene Altithermal</li> <li>Last Glacial Maximum</li> </ul> </li> <li><em>hypervolume</em> SDMs</li> </ul> </li> <li>landscape connectivity models <ul> <li>circuitscape (for F0, F1, and F2)</li> <li>least cost corridors and paths (for F0, F1, and F2)</li> </ul> </li> </ul>
PanDDA analysis of BRD1 screened against 3D-Fragment-Consortium Fragment Library (HTML Summary)
<p>Interactive summary page for "PanDDA analysis of BRD1 screened against 3D-Fragment-Consortium Fragment Library".</p> <p><strong>Please click on "0_index.html" in the "Files" section to open the interactive summary.</strong></p> <p>All datasets are also available as combined zip files from https://zenodo.org/record/48769 .</p> <p> </p>
PanDDA analysis of JMJD2D screened against Zenobia Fragment Library (HTML Summary)
<p>Interactive summary page for "PanDDA analysis of JMJD2D screened against Zenobia Fragment Library".</p> <p><strong>Please click on "0_index.html" in the "Files" section to open the interactive summary.</strong></p> <p>All datasets are also available as combined zip files from https://zenodo.org/record/48770 .</p>
PanDDA analysis of SP100 screened against selection of Maybridge Fragment Library (HTML Summary)
<p>Interactive summary page for "PanDDA analysis of SP100 screened against selection of Maybridge Fragment Library".</p> <p><strong>Please click on "0_index.html" in the "Files" section to open the interactive summary.</strong></p> <p>All datasets are also available as combined zip files from https://zenodo.org/record/48771 .</p>
PanDDA analysis of BAZ2B screened against Zenobia Fragment Library (HTML Summary)
<p>Interactive summary page for "PanDDA analysis of BAZ2B screened against Zenobia Fragment Library".</p> <p><strong>Please click on "0_index.html" in the "Files" section to open the interactive summary.</strong></p> <p>All datasets are also available as combined zip files from https://zenodo.org/record/48768 .</p>
Nicosia, Cyprus. Bedesten, interior, architectural fragments revealed by excavation.
<p>Nicosia, Cyprus. Bedesten, interior, architectural fragments revealed by excavation in southern aisles, as restored and conserved in 2010.</p>
Bhagdei (जामगढ़-भगदेई, Raisen district), Madhya Pradesh. Hanumān fragment.
<p>Bhagdei (भगदेई, Raisen district), Madhya Pradesh. Hanumān fragment, in the ruins of a shrine east of the village, circa 12th century. Located at 23°6'28"N 78°15'22"E. Photograph October, 2008.</p>
Nicosia, Cyprus. Bedesten, sculpture fragment in adjacent buildings.
<p>Nicosia, Cyprus. Bedesten, sculpture fragment, possibly part of a tomb, in adjacent buildings as document in 1974.</p>
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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
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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.
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