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133 results for “Ecotone”
Dataset: Blue carbon dynamics across a salt marsh-seagrass ecotone in a cool-temperate South African estuary
<p>This is a dataset of organic carbon, nitrogen, and phosphorus content from the Olifants estuary. The study was designed to investigate drivers of variability at different spatial scales and across the salt marsh-seagrass ecotone. Samples were collected in March 2023 from three selected sites (upper, middle, and lower) in the estuary. Each site featured three transects, extending from the salt marsh vegetation of mixed species through the <em>Zostera capensis</em> seagrass meadows towards the water. Sediment cores were taken to a depth of 50 cm, but only the top 0-5 cm section was analyzed. Carbon and nitrogen content were measured using an Elementar Vario EL Cube Elemental CHNS Analyzer, while phosphorus was determined by ICP at Central Analytical Facilities (Stellenbosch University).</p> <p> </p> <table> <tbody> <tr> <td> <p><strong>Sampling site</strong></p> </td> <td> <p><strong>GPS coordinates</strong></p> </td> </tr> <tr> <td> <p>Upper</p> </td> <td> <p>31°39'45.27"S, 18°11'42.40"E</p> </td> </tr> <tr> <td> <p>Middle</p> </td> <td> <p>31°40'56.46"S, 18°12'3.72"E</p> </td> </tr> <tr> <td> <p>Lower</p> </td> <td> <p>31°41'39.85"S, 18°11'15.95"E</p> </td> </tr> </tbody> </table> <p> </p> <p><strong>File description</strong></p> <p><em>CHNS_Dataset_SM&INT.xlsx</em>: Data for intermediate sample measurements including percent organic carbon content and and percent nitrogen content for all sites</p> <p><em>ICP_Data_INT.xlsx</em>: Data for Phosphorus content and other related measurements for the upper site. </p>
Fig. 4 in Assemblages of carabid beetles (Coleoptera: Carabidae) as zoo-indicator of water tourism impact on forest - lake ecotones
Fig. 4. Cluster analysis of the study sites (euclidic distances, Ward˙s method) based on carabid beetle assemblages
Fig. 3 in Assemblages of carabid beetles (Coleoptera: Carabidae) as zoo-indicator of water tourism impact on forest - lake ecotones
Fig. 3. Model of state of carabid beetle assemblages in pine woodlands (B) and alder woodlands (A) in control area (0), medium pressure (1) and high pressure (2).
Fig.2 in Assemblages of carabid beetles (Coleoptera: Carabidae) as zoo-indicator of water tourism impact on forest - lake ecotones
Fig.2. Whittaker diagrams of species-abundance of carabid species in alder woodland (left side) and pine woodlands (right side).
Fig. 2 in Seasonal parasitism of the leaf-cutting ant Atta sexdens Linnaeus (Hymenoptera: Formicidae) by phorid flies (Diptera: Phoridae) in a Brazilian Cerrado-Atlantic Forest ecotone
Fig. 2. Correlation between temperature and the number of leaf-cutting ants Atta sexdens parasitized by Apocephalus attophilus (r = −0.722; df = 9; P <0.05).
Fig. 1 in Seasonal parasitism of the leaf-cutting ant Atta sexdens Linnaeus (Hymenoptera: Formicidae) by phorid flies (Diptera: Phoridae) in a Brazilian Cerrado-Atlantic Forest ecotone
Fig. 1. Number of leaf-cutting ants Atta sexdens parasitized by Apocephalus attophilus and Eibesfeldtphora tonhascai in a Brazilian Cerrado-Atlantic Forest ecotone. The seasons are as follows: spring (Sep–Nov), summer (Dec–Feb), fall (Mar–May), and winter (Jun–Aug).
Fig. 5 in Small mammals in high fragmented landscape in Cerrado/ Atlantic Forest ecotone, Southeastern Brazil
Fig. 5. Diagram of ordering of species of small mammals and environmental variables in the 24 small forest fragments in southeastern Brazil, produced by canonical correspondence analysis. The Acronyms represent "uc" to understory closure, "co" to canopy openness, "ep" to epiphytism, "lia" to lianas, "ft" to cattle, "cs" to creeks and streams, "we" to wetlands, "se" to soil exposure, "ro" to rocky outcrop, "lit" to litter, "ab" to arthropod biomass, "vr" to vegetal richness, "va" to vegetal abudance, and "ath" to average tree height.
Fig. 1 in Small mammals in high fragmented landscape in Cerrado/ Atlantic Forest ecotone, Southeastern Brazil
Fig. 1. Location of the forest communities studied in 24 forest fragments located in southeastern Brazil. A description of individual forest fragments can be found in Supplementary Material Tab. A1.
Fig. 4 in Small mammals in high fragmented landscape in Cerrado/ Atlantic Forest ecotone, Southeastern Brazil
Fig. 4. Beta (β) diversity values for small mammals related to nesting (βsne), turnover (βsim) and general dissimilarity (βsor) in the 24 small forest fragments located in southeastern Brazil. The figures on the right represent the final percentage for each index.
Fig. 2 in Small mammals in high fragmented landscape in Cerrado/ Atlantic Forest ecotone, Southeastern Brazil
Fig. 2. Species accumulation curves to 24 fragments together for small mammals located in southeastern Brazil.
Fig. 3 in Vegetation of Paektu Mt. alpine tundra and changes of species composition in its ecotone
Fig. 3. Numerical classification of 42 relevés (20 ✕ 20m) of alpine tundra and adjacent larch forest vegetation from Paektu Mt. (North Korea). JACCARD's coefficient and β-flexible clustering method was used (β= -0.25). Explanations: see page 7–8.
Fig. 6 in Vegetation of Paektu Mt. alpine tundra and changes of species composition in its ecotone
Fig. 6. Light-park larch forest (Rhododendro aurei-Laricetum olgensis) – ground layer contents species of alpine tundra, e.g. Rhododendron aureum, Bupleurum euphorbioides, and Juniperus sibirica (photo I. Jarolímek).
Fig. 5 in Vegetation of Paektu Mt. alpine tundra and changes of species composition in its ecotone
Fig. 5. Timber-line on Paektu Mt. – contact zone of alpine tundra and light-park larch forest (Rhododendro aurei-Laricetum olgensis) (photo I. Jarolímek).
Datasets for Quantifying the impact of land use and land cover change on moisture recycling with convection-permitting WRF-tagging modeling in the agro-pastoral ecotone of northern China
<p>These datasets are the processed and refined data that support and lead to the described results and allow other readers to assess the conclusions in the paper, entitled “<strong>Quantifying the impact of land use and land cover change on moisture recycling with convection-permitting WRF-tagging modeling in the agro-pastoral ecotone of northern China </strong> ”.</p>
Data for: Plant thresholds and community composition of coastal marsh-forest ecotones in the US Northeast
Open the record for dataset details and reuse information.
From darkness to twilight: Morphological divergence between cave and surface-subterranean ecotone Niphargus species
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Stand-level variation drives canopy water storage by non-vascular epiphytes across a temperate-boreal ecotone
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Long-term studies of secondary succession and community assembly in the prairie-forest ecotone of eastern Kansas, Old-field succession experiment
Local and regional-scale processes interact to govern the assembly, diversity and functioning of ecological communities. Evaluating the interplay of these differently-scaled processes in the regulation of ecological systems is a challenging problem, but is crucial towards understanding and predicting the potential effects of accelerated human activity on biological diversity and ecosystem sustainability. Since 2000, two long-term field experiments have been underway in grasslands of eastern Kansas to investigate the interplay of soil resource availability, species interactions and regional processes governing plant secondary succession, community assembly, biodiversity, and ecosystem functioning. Both experiments involve manipulations of soil nutrients in permanent grassland study plots and employ multi-species seed addition treatments to evaluate the contribution of dispersal limitation and regional constraints on local species pools to the regulation of plant community dynamics. Old-field succession experiment, previously funded by the National Science Foundation, was initiated in 2001 in a section of the abandoned hay field that was sprayed with herbicide, plowed and disked prior to the start of the study to investigate plant community dynamics in the context of old-field succession initiated on bare soil. The experimental design involves factorial experimental gradients of nitrogen (N) supply (four levels of N fertilization), phosphorus (P) supply (two levels of P fertilization) and plant propagule input achieved by adding seeds of 50+ native and naturalized species to half of the study plots. With annual sampling this experiment allows us to examine old-field succession and community assembly unfolding along gradients of N and P fertilization and under conditions of ambient and experimentally-enriched species pools.
Long-term small mammal community dynamics in Northern Chihuahuan Desert grassland and shrubland ecotones
Sevilleta LTER data-sets 129 and 008 (http://sev.lternet.edu/data/sev-129, -008), sevilleta_species_list.csv from dp2 and Met_all.csv from dp1 were utilized in "Final Figure One Code.R" to calculate precipitation (A), percent cover (B) and rodent abundances (C) for the Creosote and Black Grama core sites. To generate a multi-panel figure (Figure 1). Sevilleta LTER data-set 008 was utilized in "Final Figure Two Code.R" to show non-metric multidimensional scaling between rodent foraging guilds in grassland versus shrubland to generate a two panel figure (Figure 2). Sevilleta LTER data-set 008 was utilized in "Final Figure Three Code Table 1 and 2.R" to assess comunity dynamic metrics (Package CoDyn in R) illustrating species richness, turnover, mean rand shift, and temporal changes in community composition of small mammals in each of the core sites. SIMPER analysis to calculate contributions of species to dissimilarities between the two habitats were run, and values were inserted into the final paper. Community Stability Metrics (CoDyn) such as stability, synchrony, and variance were run, and values inserted into a table in the final paper. "Final Analysis Code.R" utilizes Sevilleta LTER data-sets 129 and OO8, sevilleta_species_list.csv, and Met_all.csv to conduct linear regressions, ANOVA, and significance testing to describe differences between the Heteromyid and Cricetid communities in both the grassland and shrubland. Three tables are generated for possible further analysis, but they are not utilized in this paper. All significant values were utilized, but not output as an additional table.
Temporal Dynamics of Soil Carbon and Nitrogen Resources Within a Grassland-Creosote Ecotone at the Sevilleta National Wildlife Refuge, New Mexico (1992-1994)
Plant communities across large portions of the southwestern United States have shifted from grassland to desert shrubland. Studies have demonstrated that soil nutrient resources become spatially more heterogeneous and are redistributed into islands of fertility with this shift in vegetation. This research addressed the additional question of whether soil resources become more temporally heterogeneous along a grassland-shrubland ecotome. Within adjacent grassland and creosotebush sites, soil profiles were described at 3 pits and samples collected for description of nutrient resources within the profile. Relative cover of plant species and bare soil were determined within each site by line transects. The top 20-cm of bare soil or soil beneath the canopy of grasses/creosotebush were collected 17 times during 1992-1994. Soil samples were analyzed for soil moisture, extractable ammonium and nitrate, nitrogen mineralization potential, microbial biomass carbon, total organic carbon, microbial respiration, dehydrogenase activity, ratio of microbial C to total C (C[mic]-to-C[org]), and microbial respiration to biomass carbon (metabolic quotient). The major differences in the structure of soils between sites were the apparent loss of a 3 to 5-cm depth of sandy surface soil at the creosotebush site and an associated increase in calcium carbonate content at a more shallow depth. Soils under plants at both sites had greater total and available nutrient resources with higher concentrations under creosotebush than under grasses. Greatest temporal variation in available soil resources was shown in soils under creosotebush. When expressed on an area basis, greater temporal variation in the total amount of available soil resources was shown in the grassland site, primarily due to greater plant cover (45% in grassland vs. 8% in creosote).
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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.