Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
7
datasets available to search
ShareScore release 0.7.1
Dataset results
7 results for “tundra vascular plants”
Vascular plant species list, by quadrat, for harvests of tussock , wet sedge and dry heath tundra and a toposequence which included "shrub/lupine," "riverside willow" and "footslope Equisetum" communities North Slope Alaska, Arctic LTER 1983-1996.
Vascular plant species list, by quadrat, for harvests of tussock tundra, wet sedge tundra, dry heath tundra, and a toposequence which also included "shrub/lupine," "riverside willow" and "footslope Equisetum" communities. Includes results of long-term nutrient enrichment, increased temperature, and shade houses in selected tundra types.
Higher vascular plant abundance associated with decreased ecosystem respiration after 20 years of warming in the forest-tundra -ecotone
<p><span>The ongoing climate warming is promoting shrub abundance in high latitudes, but the effect of this phenomenon on ecosystem functioning is expected to depend on whether deciduous or evergreen species increase in response to warming. </span></p> <p><span>To explore effects of long-term warming on shrubs and further on ecosystem functioning, we analyzed vegetation and ecosystem CO<sub>2</sub> exchange after 20 years of warming in the forest-tundra ecotone in sub-arctic Sweden. A previous study conducted nine years earlier had found increased evergreen <em>Empetrum</em> <em>nigrum</em> ssp. <em>hermaphroditum</em> in the forest and increased deciduous <em>Betula</em> <em>nana</em> in the tundra. </span></p> <p><span>Following current understanding, we expected a continued increase in shrub abundance that would be stronger in tundra than in forest. We expected warming to increase ecosystem respiration (</span><span>R<sub>e</sub></span><span>) and gross primary productivity (GPP), with a greater increase in </span><span>R<sub>e </sub>in tundra due to increased deciduous shrub abundance, leading to a less negative net ecosystem exchange (NEE) and reduced ecosystem C sink strength. </span></p> <p><span>As predicted, vascular plant abundances were higher in the warmed plots with a stronger response in tundra than in forest. </span><span>However, whereas <em>B. nana</em> had increased in abundance since the last survey, <em>E. hermaphroditum </em>abundance had declined due to several moth and rodent outbreaks during the past decade. </span><span>I</span><span>n contrast to predictions, </span><span>R<sub>e </sub>was significantly lower in the warmed plots irrespective of habitat, and GPP increased marginally only in the forest. The lower R<sub>e</sub> and a higher GPP under warming in the forest together led to increased net C sink. </span><span>R<sub>e </sub>was negatively associated with the total vascular plant abundance.</span></p> <p><span>Our results highlight the importance of disturbance regimes for vegetation responses to warming. </span><span>Climate warming may promote species with </span><span>both a high capacity to grow under warmer conditions and a resilience towards herbivore outbreaks. Negative correlation between R<sub>e</sub> and total vascular plant abundance further indicates that t</span><span>he </span><span>indirect impacts of increased plants on soil microclimate may become increasingly important for ecosystem CO<sub>2</sub> exchange </span><span>in the long </span><span>run</span><span>, </span><span>which adds to the different mechanisms that link warming and CO<sub>2</sub> fluxes in northern ecosystems.</span></p>
Higher vascular plant abundance associated with decreased ecosystem respiration after 20 years of warming in the forest-tundra -ecotone
Open the record for dataset details and reuse information.
Data from: Altitude effects on spatial components of vascular plant diversity in a subarctic mountain tundra
Environmental gradients are caused by gradual changes in abiotic factors, which affect species abundances and distributions, and are important for the spatial distribution of biodiversity. One prominent environmental gradient is the altitude gradient. Understanding ecological processes associated with altitude gradients may help us to understand the possible effects climate change could have on species communities. We quantified vegetation cover, species richness, species evenness, beta diversity, and spatial patterns of community structure of vascular plants along altitude gradients in a subarctic mountain tundra in northern Sweden. Vascular plant cover and plant species richness showed unimodal relationships with altitude. However, species evenness did not change with altitude, suggesting that no individual species became dominant when species richness declined. Beta diversity also showed a unimodal relationship with altitude, but only for an intermediate spatial scale of 1 km. A lack of relationships with altitude for either patch or landscape scales suggests that any altitude effects on plant spatial heterogeneity occurred on scales larger than individual patches but were not effective across the whole landscape. We observed both nested and modular patterns of community structures, but only the modular patterns corresponded with altitude. Our observations point to biotic regulations of plant communities at high altitudes, but we found both scale dependencies and inconsistent magnitude of the effects of altitude on different diversity components. We urge for further studies evaluating how different factors influence plant communities in high altitude and high latitude environments, as well as studies identifying scale and context dependencies in any such influences.
Vascular plant community surveys across different reindeer grazing regimes in the Fennoscandian tundra
<p>This dataset contains data from the experiment described in "Gibson K., Olofsson, J. Mooers, A. Ø., & Monroe, M. J. (2021) Pulse grazing by reindeer (<em>Rangifer tarandus</em>) can increase the phylogenetic diversity of vascular plant communities in the Fennoscandian tundra. Ecology and Evolution. <em>In press</em>." </p> <p>The data is from a multi-year (2004-2007) quasi-experimental study in Northern Fennoscandia, which was designed to analyze the effect of reindeer grazing on vascular plant community diversity. Our study design used a permanent fence constructed in the 1960s and temporary fences constructed along the permanent fence to expose plant communities to three different grazing regimes: light (almost never grazed), pulse (grazed every other year) and press (chronic grazing for over forty years). The study deisgn consisted of plots setup at five different sites at least 100m apart from each other along the permanent fence. Each site was divided<span><span><span><span><span><span><span><span><span><span><span><span><span><span><span> into the three grazing regimes (light, pulse and press). For each site and grazing regime, one replicate plot was placed in a drier area and other in a wetter area. Each plot (<em>n</em> = 36) w</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span>as evenly split into nine</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span> subplots. </span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>This dataset is composed of plant survey data at the sub-plot level with a variable for the presence/absence and relative abundance of each surveyed species. The biodiversity metrics used in the associated manuscript can be calculated from these variables. </p> <p>The main results of this experiment were that (1) the species richness and evenness of plant communities with pulse and press grazing did not differ from communities with light grazing, (2) there was a transition from shrub‐dominated communities with light grazing to graminoid‐dominated communities with pulse and press grazing and (3) communities with pulse, but not press, grazing were more phylogenetically dispersed than communities with light grazing.</p>
Vascular plant community surveys across different reindeer grazing regimes in the Fennoscandian tundra
Open the record for dataset details and reuse information.
Data from: Altitude effects on spatial components of vascular plant diversity in a subarctic mountain tundra
Open the record for dataset details and reuse information.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.