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286 results for “forest composition”
Data from: Seed bank diversity and composition during natural tropical forest regeneration
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Data on composition and structure of trees inside and outside of forests in Guanacaste, Costa Rica: comparisons among conservation areas, fencerows, and municipal parks
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Changes in species composition mediate direct effects of climate change on future fire regimes of boreal forests in northeastern China
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Data from: Assessing the effects of land‑use intensity on small mammal community composition and genetic variation in Myodesglareolus and Microtus arvalis across grassland and forest habitats
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Pattern and driver of the compositional variations in a tropical cloud forest: Comparing vascular epiphytes with terrestrial woody plants
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Data from: A three decade assessment of climate-associated changes in forest composition across the north-eastern USA
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Data from: A standardized assessment of forest mammal communities reveals consistent functional composition and vulnerability across the tropics
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Warming and reduced rainfall alter fungal necromass decomposition rates and associated microbial community composition and functioning at a temperate-boreal forest ecotone
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Chronic browsing by an introduced mammalian herbivore in a tropical island alters species composition and functional traits of forest understory plant communities
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Not all trees can make a forest: tree species composition and competition control forest encroachment in a tropical savanna
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Data from: Intra-specific variation in tree growth responses to neighborhood composition and seasonal drought in a tropical forest
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Tree composition mitigates the negative effects of urbanization on specialist and generalist forest moth communities
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Correlations between dominant vegetation type and composition and diversity of soil bacterial communities in a subtropical forest
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Floristic composition, structure and diversity of riparian forests in southwestern Nigeria: Conservation is inevitable
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Dataset: Seasonality, drivers, and isotopic composition of soil CO2 fluxes from tropical forests of the Congo Basin
<p>These data sets contain data from soil CO2 flux measurements and its drivers (soil moisture, soil temperature) from lowland and montane tropical forests of the Congo Basin. Additionally, 13C values of soil emitted CO2, SOC, Leaflitter, and stream dissolved CO2 are reported. A Manuscript using these data sets has been submitted to Biogeosciences</p>
Forest patch size predicts seed bank composition in urban areas
<p><b>Questions:</b></p> <p>As urban areas expand around the world, understanding how to restore and maintain forests within the urban environment becomes increasingly important. Given that a comprehensive understanding of regeneration dynamics is critical to designating appropriate management interventions we ask the following: how does regeneration, vis-à-vis the buried seed bank, vary in heterogenous urban forests? And, can forest patch size be used to predict regeneration and consequent management interventions?</p> <p><b>Location:</b></p> <p>Vacant lots and public parks throughout New Haven, CT, USA.</p> <p><b>Methods:</b></p> <p>We sampled buried seed banks in 131 plots distributed across three forest patch sizes ranging from large intact parks (95-126 ha), to small parks (1-19 ha), and vacant lots (.05-.65 ha). We collected soil samples from the surface mineral soil and stratified them over sand in a greenhouse over a period of 5 months to record germination.</p> <p><b>Results:</b></p> <p>By examining seed bank floristics in a range of forest patch sizes we found that species composition and dominance of specific functional groups shifted with patch size representing a spectrum of urbanization within just one city. Seed bank floristics in large parks more closely resembled results from seed bank studies in rural forests with over 85% native germinants on average. In contrast, vacant lots were dominated by non-native germinants and more ruderal species indicative of earlier successional stages. Seed banks in small parks were variable and in some cases were more similar to large parks or vacant lots.</p> <p><b>Conclusions:</b></p> <p>Our findings suggest that large parks in urban areas may be largely self-sustaining whereas smaller parks may require more intensive management for site rehabilitation, especially in early states of succession. Furthermore, our results confirm the highly heterogeneous nature of urban forest patches and call for more systematic sampling of urban areas to capture this variation and improve management prescriptions and outcomes.</p>
Permafrost thaw in boreal peatlands is rapidly altering forest community composition
<p>Boreal peatlands are frequently underlain by permafrost, which is thawing rapidly. A common ecological response to thaw is the conversion of raised forested plateaus to treeless wetlands, but unexplained spatial variation in responses, combined with a lack of stand-level data, make it difficult to predict future trajectories of boreal forest composition and structure. We sought to characterize patterns and identify drivers of forest structure, composition, mortality, and recruitment in a boreal peatland experiencing permafrost thaw. To do this, we established a large (10 ha) permanent forest plot (completed in 2014), located in the Northwest Territories, Canada, that includes 40,584 mapped and measured trees. In 2018, we conducted a comprehensive mortality and recruitment recensus. We also measured frost table depth, soil moisture, soil humification, and organic layer thickness within the plot between 2012 and 2018, and used habitat association tests to link these variables to forest characteristics and dynamics. Forest composition and structure varied markedly throughout the plot and were strongly governed by patterns in permafrost presence and organic layer thickness. Overall, there was a net loss of trees from the plot at a rate of 0.7% yr-1. Mortality of black spruce, the dominant tree species, was more than double that of recruitment and was strongly associated with permafrost thaw. In contrast, recruitment of larch was over four times greater than mortality, and occurred primarily in low-lying, permafrost-free wetlands with mineral soil near the surface. The trends in tree demography and underlying drivers suggest that spruce-dominated permafrost plateaus will be converted into larch-dominated wetlands as permafrost thaw progresses in boreal peatlands, particularly in areas where mineral soil is near the surface. In the longer term, thaw could increase the hydrologic connectivity of the landscape, resulting in widespread drainage and re-vegetation by spruce, but we did not find evidence that this is occurring yet. Given the increasing rates of permafrost thaw, and positive feedbacks between thaw and forest change, we predict that larch abundance will continue to increase in boreal peatlands over the coming decades, leading to shifts in ecosystem function, wildlife habitat, albedo, and snow dynamics.</p>
FIGURE 19 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURE 19. Species abundance distributions of Empidoidea (Empididae, Hybotidae, Dolichopodidae & Brachystomatidae combined) in dry lowland forest (DL), mid elevation evergreen forest (EM) and moist hill evergreen (MHE) communities as delimited by cluster analysis in Figure 17. Main figure. Rank / abundance plots of log10 of abundance as a percentage of the most abundant species plotted against species rank (from highest to lowest). Inset. k-dominance plots of relative cumulative abundance plotted against log10 species rank (from highest to lowest).
FIGURES 17–18 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURES 17–18. Cluster analysis of Empidoidea (Empididae, Hybotidae, Dolichopodidae & Brachystomatidae combined) using unweighted pair-group average and Sorensen similarity. Bootstrapping was performed with 1000 resamples; the percentage of replicates where each of the major clusters is still supported is shown at nodes. 17, Clustering of data for a full year for each individual trap on Doi Inthanon during 2014. Individual traps are identified at termini and clusters designated as A, B, C and D are indicated. Communities defined by the major clusters A, C and D are assigned names broadly consistent with the forest biotopes and elevations they occupy; MHE, moist hill evergreen; EM, evergreen mid-elevation; DL, dry lowland; 18, Clustering of data for each trap during a four month period during the early-monsoon (April–July) and late-monsoon (September–December). Individual traps are identified at the termini with a suffix "early" of "late". E and F indicate major clusters.
FIGURE 16 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURE 16. Variation in taxonomic distinctness (J*) of Empidoidea (Empididae, Hybotidae, Dolichopodidae & Brachystomatidae combined) with elevation on Doi Inthanon (solid line). Values of J* were calculated for Empidoidea sampled throughout 12 months in all traps operated at each 500 m elevation zone (<500, 500–1000, 1000–1500, 1500–2000, 2000–2500, &>2500 m) and were plotted against the mean elevation of all traps in each zone. Data were fitted to a linear regression model in PAST (solid line; r2 = 0.8804, p = 0.0056) and 95% confidence intervals (dashed line) were computed from 1000 random replicates taken from the pooled data set.
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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.