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.
180
datasets available to search
ShareScore release 0.7.1
Dataset results
180 results for “Drylands”
Figure 4 in Clonal mechanisms that matter in Agave fourcroydes and A. sisalana invasions in drylands: implications for their management
Figure 4. Mean and standard deviation of rooting rates of Agave fourcroydes and A. sisalana bulbils under experimental plots (greenhouse and natural conditions). Different letters indicate statistical differences (p-values <0.001) between planting conditions for Fisher's exact tests. The lower case letters correspond to the comparisons in the experiment under natural conditions, and the upper case letters refer to those in the greenhouse experiment.
Figure 3 in Clonal mechanisms that matter in Agave fourcroydes and A. sisalana invasions in drylands: implications for their management
Figure 3. Box-and-whisker plots for total aerial bulbil and basal shoot production per reproductive individual registered in Agave fourcroydes and A. sisalana. Box represents median and 25th and 75th percentile levels, crosses are the means, and whiskers are the ranges. N = 30 for each species. Non-parametric Mann-Whitney U tests showed no significant differences between species (U = 403.5 and 449.0, and p-values = 0.492 and 0.986 for bulbil and basal shoot production, respectively). U = U statistic.
Figure 2 in Clonal mechanisms that matter in Agave fourcroydes and A. sisalana invasions in drylands: implications for their management
Figure 2. Flowering, aerial bulbil, and shoot from rhizomes phenology of Agave fourcroydes (AF) and A. sisalana (AS) in the study zone. Wilcoxon signed-rank tests showed no statistical differences between species in any variable. Mean % floral buds: W = 29.0, p-value = 0.141; Mean % flowers: W = 2.0, p-value = 0.789; Mean % bulbils: W = 49.0, p-value = 0.834; Mean % fallen bulbils: W = 13.0, p-value = 0.083; Mean % new shoots from rhizomes: W = 16.0, p-value = 0.834. W = Wilcoxon statistic.
Figure 1 in Clonal mechanisms that matter in Agave fourcroydes and A. sisalana invasions in drylands: implications for their management
Figure 1. Diagram of a rosette of Agave fourcroydes or A. sisalana showing their clonal ramet types. BS: basal shoots, born directly from the rosette; RS: shoots from rhizomes, and aerial bulbils from floral scapes.
Fig. 2 in Untapped potential: The utility of drylands for testing eco-evolutionary relationships between hosts and parasites
Fig. 2. Worldwide endemic and imported cases of (A) cutaneous leishmaniasis (CL) and (B) viceral leishmaniasis (VL) as of 2018. Warmer colors indicate a higher number of cases reported that year. Source: World Health Organization (2019).
Data for: Herbivores' impacts cascade through the brown food web in a dryland
<p><span><span>Food webs can be conceptualized as being powered by energy derived from living and dead vegetation, respectively. Most food web research has focused on "green food webs" which begin with the consumption of living vegetation by herbivores. However, "brown food webs" which stem from the consumption of senescent vegetation by detritivores are also an important channel of energy transfer. In theory, herbivores have the potential to disrupt brown food webs by consuming plant material before it has the opportunity to senesce and become available for detritivores. Here we investigate the effects that grazing by kangaroos whose population had irrupted in the absence of an apex predator has on the brown food web in an arid environment. We compared the cover of living and dead vegetation and the abundances of detritivorous termites and their predators inside one ha herbivore exclosures and nearby control plots. Results show there was more cover of living and dead vegetation inside the exclosures. Similarly, abundances of termites and small vertebrate predators of termites were greater inside the exclosures. Our study provides evidence that consumption of plant material by irruptive herbivores can disrupt the functioning of the brown food web by reducing the flow of energy from plant biomass to termites which in turn translates to reduced abundances of termites and small vertebrates that feed on termites. Our findings have implications for conservation and management because they shed light on a previously unconsidered threat to the functioning of arid ecosystems, disruption of brown food webs by irruptive herbivores. </span></span></p>
Data for: Herbivores disrupt the flow of food resources to termites in dryland ecosystems
<p><span>Irruption of herbivore populations due to the extirpation of predators has led to dramatic changes in ecosystem functioning worldwide. Herbivores compete with other species for their primary source of nutrition, plant biomass. Such competition is typically considered to occur between species in closely related clades and functional groups but could also occur with detritivores that consume senescent plant biomass. Here, we test predictions that herbivores' indirect impacts on dead vegetation increase with primary productivity and extend to termites which feed on senescent vegetation. We compared dead vegetation cover and termite activity in herbivore exclosures and associated grazed plots at 3 locations situated along a rainfall gradient in arid Australia where kangaroo populations have irrupted. Dead vegetation cover and termite activity increased with rainfall in ungrazed plots but showed a negligible response to rainfall in grazed plots. Our results suggest that grazing can disrupt the flow of energy to detritivores and decouple the relationship between termite activity and primary productivity. Such disruption could have far-reaching impacts on arid ecosystems because many organisms sit within "brown food webs" that are sustained by energy derived from decomposition of senescent plant-tissues. </span></p>
Dataset of Thermography captures the differential sensitivity of dryland functional types to changes in rainfall event timing and magnitude
<p>The folder contains all data that have been used in the article "<strong>Thermography captures the differential sensitivity of dryland functional types to changes in rainfall event timing and magnitude" </strong>published in the "New Phytologist" journal.</p> <p>https://doi.org/10.1111/nph.19127</p>
Supporting isotopic data for: Differential utilization of submerged leaf litter by microbial biofilms and macroinvertebrates in a large dryland river
Open the record for dataset details and reuse information.
Land use change converts temperate dryland landscape into a net methane source
Open the record for dataset details and reuse information.
Data for: Herbivores disrupt the flow of food resources to termites in dryland ecosystems
Open the record for dataset details and reuse information.
Data for: Herbivores’ impacts cascade through the brown food web in a dryland
Open the record for dataset details and reuse information.
Climate change may alter the signal of plant facilitation in Mediterranean drylands
Open the record for dataset details and reuse information.
Resource redistribution mediated by hydrological connectivity modulates vegetation response to aridification in drylands
Open the record for dataset details and reuse information.
Handheld Microclimate Data from Californian Drylands
Handheld microclimate data (temperature and relative humidity) collected using the Mengshen Temperature and Humidity Meter at two aridity gradients across California. Microsites included the open, shrub, and two artificial shelter types: square and triangle.
Logger Microclimate Data from Californian Drylands Winter 2023 Sampling.
Logger microclimate data (temperature, sunlight intensity, and relative humidity) were collected using the HOBO ONSET 64K data logger and OMEGA engineering temperature and RH pendant two aridity gradients across California. Microsites included the open, shrub, and two artificial shelter types: square and triangle.
Handheld Microclimate Data from Californian Drylands 2023.
Handheld microclimate data (temperature and relative humidity) collected using the Mengshen Temperature and Humidity Meter at two aridity gradients across California. Microsites included the open, shrub, and two artificial shelter types: square and triangle. Wind speed was recorded using Kestrel handheld device. Surface Ground Temperature was recorded using a laser meter.
What could explain 13C signature of dryland biocrusts? Evaluating potential resource transfer between plants and biocrusts.
Dryland ecosystems are increasing in geographic extent and contribute greatly to interannual variability in global carbon dynamics. Disentangling interactions among dominant primary producers can help partition their contributions to dryland C dynamics. We measured the δ13C signatures of biological soil crusts and dominant plant species (C3 and C4) across a regional scale in the southwestern USA to determine if biocrust cyanobacteria were coupled to plant productivity (using plant-derived C mixotrophically), or independent of plant activity (and therefore purely autotrophic).
Data from: Applying a dryland degradation framework for rangelands: the case of Mongolia
Livestock-caused rangeland degradation remains a major policy concern globally and the subject of widespread scientific study. This concern persists in part because it is difficult to isolate the effects of livestock from climate and other factors that influence ecosystem conditions. Further, degradation studies seldom use multiple plant and soil indicators linked to a clear definition of and ecologically-grounded framework for degradation assessment that distinguishes different levels of degradation. Here, we integrate two globally applicable rangeland degradation frameworks and apply them to a broad-scale empirical dataset for the country of Mongolia. We compare our assessment results with two other recent national rangeland degradation assessments in Mongolia to gauge consistency of findings across assessments and evaluate the utility of our framework. We measured livestock-use impacts across Mongolia's major ecological zones: mountain and forest steppe, eastern steppe, steppe, and desert steppe. At 143 sites in 36 counties, we measured livestock-use and degradation indicators at increasing distances from livestock corrals in winter-grazed pastures. At each site, we measured multiple indicators linked to our degradation framework, including plant cover, standing biomass, palatability, species richness, forage quality, vegetation gaps and soil surface characteristics. Livestock use had no effect on soils, plant species richness or standing crop biomass in any ecological zone, but subtly affected plant cover and palatable plant abundance. Livestock effects were strongest in the steppe zone, moderate in the desert steppe and limited in the mountain/forest and eastern steppes. Our results aligned closely with those of two other recent country-wide assessments, suggesting that our framework may have widespread application. All three assessments found that very severe and irreversible degradation is rare in Mongolia (1-18% of land area), with most rangelands only slightly (33-53%) or moderately (25-40%) degraded. We conclude that very severe livestock-induced rangeland degradation is overstated in Mongolia. However, targeted rangeland restoration coupled with monitoring, adaptive management and stronger rangeland governance are needed to prevent further degradation where heavy grazing could cause irreversible change. Given the broad applicability of our degradation framework for Mongolia, we suggest it be tested for application in other temperate grasslands throughout Central Asia and North America.
Data from: Macro-detritivores assist resolving the dryland decomposition conundrum by engineering an underworld heaven for decomposers
<p>Litter decomposition in most terrestrial ecosystems is regulated by moisture-dependent microorganism activity, among other things. <span class="fontstyle01"><span>Decomposition models typically underestimate rates of plant litter decomposition in drylands, suggesting the existence of additional drivers of decomposition. Attempts to reveal these drivers have predominantly focused on abiotic degradation agents, alternative moisture sources,</span></span> and <span class="fontstyle01"><span>soil-litter mixing</span></span>. The role of burrowing animals in promoting decomposition has received less attention despite greatly contributing to plant litter transfer from the harsh desert surface to the moister and nutrient-rich environment belowground. Our goal was to explore how macro-detritivore burrows affect plant litter mineralization dynamics. We introduced <sup>13</sup>C-labeled litter belowground into (1) desert isopod (<i>Hemilepistus reaumuri</i>) burrows and (2) artificial burrows, and aboveground on top of (3) isopod fecal pellet mounds and (4) bare soil crust. We compared the litter mass loss between the four treatments and used cavity ring-down spectroscopy to reveal the <i>in situ</i> mineralization dynamics. No litter mineralization was evident during the dry summer months both above- and belowground. Following rain events, mineralization rates spiked in all four micro-environments, quickly diminishing aboveground while slowly waning belowground. Total litter mass loss was twofold higher below- than aboveground and was significantly higher in isopod burrows compared to artificial burrows. Our findings demonstrate that burrowing macro-detritivores promote litter decomposition in deserts by transferring organic matter to their burrows where favorable climatic conditions and a nutrient-enriched environment foster microbial activity. Thus, attempts to resolve the dryland decomposition conundrum should not be limited to exploring factors that allow decomposition under harsh desert surface climatic conditions, but focus on the role that animals play in facilitating decomposer-friendly environments to which they translocate plant litter.</p>
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.