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.
40
datasets available to search
ShareScore release 0.9.0
Dataset results
40 results for “warming tolerance”
Photosynthesis in newly-developed leaves of heat-tolerant wheat acclimates to long-term nocturnal warming
<p>We examined photosynthetic capacity of newly-developed and pre-existing flag leaves of four wheat genotypes under three night temperatures (15, 20 and 25 °C) and common day temperature of 26 °C in two controlled environment experiments. In newly-developed leaves which acclimated (i.e. maintained or increased) the maximum rate of net CO<sub>2</sub> assimilation (<em>A</em><sub>n</sub>) to long-term (9–13 weeks) nocturnal warming, acclimation was underpinned by greater capacity of Rubisco carboxylation (<em>V</em><sub>cmax</sub>) and photosynthetic electron transport (<em>J</em>). This indicates a night-dependent temperature sensitivity of the activation state of Rubisco. Metabolite profiling linked acclimation of <em>A</em><sub>n</sub> to greater accumulation of monosaccharides and saturated fatty acids in leaves, suggesting roles for osmotic adjustment of leaf turgor pressure and maintenance of cell membrane integrity. By contrast, warm night-induced inhibition of <em>A</em><sub>n</sub> was related to reductions in stomatal conductance of CO<sub>2</sub> and <em>J</em>, despite higher basal electron transport thermal stability: <em>T</em><sub>crit</sub> 51 of 45–46.5 °C in non-acclimated versus <em>T</em><sub>crit</sub> of 43.8–45 °C in acclimated leaves. Pre-existing leaves exposed to short-term nocturnal warming (5–7 nights) showed no change in instantaneous temperature responses of <em>A</em><sub>n</sub> and photosynthetic capacity, except for an elite heat-tolerant genotype. These findings can be used to support strategies for developing climate-resilient wheat.</p>
Photosynthesis in newly-developed leaves of heat-tolerant wheat acclimates to long-term nocturnal warming
Open the record for dataset details and reuse information.
Heat tolerance of marine ectotherms in a warming Antarctica
<p><span>Global warming is affecting the Antarctic continent in complex ways. Because Antarctic organisms are specialized to living in the cold, they are vulnerable to increasing temperatures, though quantitative analyses of this issue are currently lacking. Here we compiled a total of 184 estimates of heat tolerance belonging to 39 marine species and quantified how survival is affected concomitantly by the intensity and duration of a thermal stress. Species exhibit thermal limits displaced towards colder temperatures, with contrasting strategies between arthropods and fish that exhibit low tolerance to acute heat challenges, and brachiopods, echinoderms and molluscs that tend to be more sensitive to chronic exposure. These differences might be associated with mobility. A dynamic mortality model suggests that Antarctic organisms already encounter temperatures that might be physiologically stressful and indicate that these ecological communities are indeed vulnerable to ongoing rising temperatures.</span></p>
Towards an understanding of the latitudinal patterns in thermal tolerance and vulnerability of woody plants under climate warming
<p>Predicting spatial patterns in thermal tolerance and vulnerability of species under climate warming remains a challenge. Current knowledge is mainly from experiment-based thermal physiology of limited numbers of ectotherms, yet large-scale evaluations on plants remain elusive. Here, using distribution maps with spatial resolutions of 20×20 km for 5628 woody species in China, we propose a novel approach, i.e. thermal distribution curves, to describe species' realized thermal niches, and then estimate their thermal tolerance and warming risks under projected climate warming in 2050s and 2070s. We find that species' vulnerability and potential local extinction risks within grid cells decrease with latitude and increase with aridity due to narrow thermal tolerance of species located at low latitudes and arid regions. Over 90% of species could still tolerate future warming in most areas, indicating relatively optimistic expectation of potential local extinctions. Our study presents a new framework to quantify climate warming impacts on a large number of species without sufficient physiological information, and provides fundamental references for conservation planning under climate change.</p>
Tolerance of coralline algae to ocean warming and marine heatwaves
<p>Ocean warming (OW) and marine heatwaves (MHWs) rapidly transform marine ecosystems, especially when they impact keystone or foundation species. Foundation species such as kelps, fucoids and corals are highly sensitive to heat stress, which threatens the future of temperate seaweed forests and tropical reefs. However, functioning and resilience of these systems also rely on the less conspicuous coralline algae, whose thermal tolerances have gone largely untested. Here, we examined the sensitivity of four temperate coralline algal morphotypes from three different species to four realistic present-day and future OW and MHW scenarios (ambient [16°C constant]; ambient+MHW [16°C baseline + a symmetric two-week heatwave with a peak intensity of 18.7°C]; future [18.7°C constant]; future+MHW [18.7°C baseline + a symmetric two-week heatwave with a peak intensity of 21.4°C]). Photo-physiology (e.g., Fv/Fm) and calcification physiology (e.g., proxies for calcifying fluid saturation state Ω CF ) were generally unaffected by the treatments, implying a high thermo-tolerance of our study species compared to other important marine foundation species. We ascribe this mainly to their photosynthetic apparatus that, unlike in other photoautotrophs, continued to function under heat stress. Experimental evidence presented here and elsewhere implies that coralline algae are likely to continue to play their crucial ecological roles in a warming ocean. Yet, such predictions are fraught with uncertainty due to the substantial gaps in our knowledge. We attempt to highlight some of these gaps and aim to present potential physiological underpinnings of their thermo-tolerance.</p>
Study to Assess the Safety, Tolerability, Efficacy and PK of APL-2 in Patients With Warm Type Autoimmune Hemolytic Anemia (wAIHA) or Cold Agglutinin Disease (CAD)
ClinicalTrials.gov study NCT03226678. IPD Sharing: NO. Countries: 1. Publications: 1.
Data for: Cold adaptation does not handicap warm tolerance in the most abundant Arctic seabird
Open the record for dataset details and reuse information.
Decoding thermal resilience in fish: Acute warming tolerance is associated with neural failure in rainbow trout
Open the record for dataset details and reuse information.
Tolerance of coralline algae to ocean warming and marine heatwaves
Open the record for dataset details and reuse information.
Data from: Plasticity of cold tolerance and body composition in response to varying warming conditions in a temperate wolf spider
Open the record for dataset details and reuse information.
Data from: Asymmetric micro-evolutionary responses in a warming world: Heat-driven adaptation enhances metal tolerance, but not vice versa
Open the record for dataset details and reuse information.
Towards an understanding of the latitudinal patterns in thermal tolerance and vulnerability of woody plants under climate warming
Open the record for dataset details and reuse information.
Heat tolerance of marine ectotherms in a warming Antarctica
Open the record for dataset details and reuse information.
Data from: The interaction of exposure and warming tolerance determines fish species vulnerability to warming stream temperatures
Species vulnerability to climate change involves an interaction between the magnitude of change (exposure) and a species' tolerance to change. We evaluated fish species vulnerability to predicted stream temperature increases by examining warming tolerances across the Wyoming fish assemblage. Warming tolerance combines stream temperature with a thermal tolerance metric to estimate how much warming beyond current conditions a species can withstand. Brown trout, rainbow trout, and burbot had the lowest warming tolerances and highest proportion of currently occupied sites that will become unsuitable under predicted temperature increases. These most vulnerable species were coldwater species, but had neither the lowest thermal tolerances, nor would they experience the greatest temperature increases. Our results highlight the importance of considering the interaction of exposure and warming tolerance when predicting climate change vulnerability and demonstrate an approach that can be applied broadly.
Data from: A conifer–angiosperm divergence in the growth vs shade tolerance trade-off underlies the dynamics of a New Zealand warm-temperate rain forest
1. A central tenet of forest ecology is that succession and regeneration dynamics are driven by an interspecific trade-off between juvenile growth rates in high light and shade tolerance. There is evidence, however, that a single trade-off axis may fail to explain the dynamics of mixed conifer-angiosperm rainforests in the southern hemisphere, especially in New Zealand. 2. We tested for growth vs shade tolerance trade-offs by measuring juvenile growth of five podocarps and five broadleaved canopy angiosperms across a wide range of light environments in a New Zealand warm-temperate rainforest. The light compensation point of growth was used as a measure of species light requirements, which we then compared with height growth in 10% light, approximating the environments encountered beneath small tree-fall gaps. 3. Despite considerable overlap between the ranges of both growth rates and compensation points found in the two lineages, major axis tests showed that the growth vs shade tolerance trade-off differed significantly between podocarp and angiosperm species. At a common compensation point, angiosperms were faster-growing than podocarps in 10% light. However, juveniles of these angiosperm species were notably scarce in the more open environments associated with forest margins. 4. Synthesis. A conifer–angiosperm divergence in the growth vs shade tolerance trade-off may explain long-standing problems of the dynamics of these forests. Although juveniles of most lowland podocarps can tolerate considerable shade, the more vigorous response of broadleaved angiosperms to small canopy openings enables them to out-compete podocarps in old-growth stands. The greater abundance of podocarp juveniles on forest margins cannot be attributed to them outcompeting angiosperm species where light is abundant, and is likely to reflect superior resistance to frost and/or drought. The drivers of the dynamics of New Zealand's podocarp–broadleaved forests therefore differ appreciably from those ascribed to tropical and north-temperate forests.
Using aerobic exercise to evaluate sub-lethal tolerance of acute warming in fishes
<p>We investigated whether fatigue from sustained aerobic swimming provides a sublethal endpoint to define tolerance of acute warming in fishes, as an alternative to loss of equilibrium (LOE) during a critical thermal maximum protocol (CT<sub>max</sub>). Two species were studied, Nile tilapia <i>Oreochromis niloticus</i> and pacu <i>Piaractus mesopotamicus</i>. Each fish underwent an incremental swim test to determine gait transition speed (U<sub>GT</sub>), where it first engaged the unsteady anaerobic swimming mode that preceded fatigue. After suitable recovery each fish was swum at 85% of their own U<sub>GT</sub> and warmed 1°C every 30 min, to identify the temperature at which they fatigued, denoted as CT<sub>swim</sub>. Fish were also submitted to a standard CT<sub>max</sub>, warming at the same rate as CT<sub>swim, </sub>under static conditions until LOE. All individuals fatigued in CT<sub>swim</sub>, at a mean temperature approximately 2°C lower than their CT<sub>max</sub>. Therefore, if exposed to acute warming in the wild, the ability to perform aerobic metabolic work would be constrained at temperatures significantly below those that directly threatened survival. The collapse in performance at CT<sub>swim</sub> was preceded by a gait transition qualitatively indistinguishable from that during the incremental swim test. This suggests that fatigue in CT<sub>swim</sub> was linked to an inability to meet the tissue oxygen demands of exercise plus warming. This is consistent with the oxygen and capacity limited thermal tolerance (OCLTT) hypothesis, regarding the mechanism underlying tolerance of warming in fishes. Overall, fatigue at CT<sub>swim</sub> provides an ecologically relevant sub-lethal threshold that is more sensitive to extreme events than LOE at CT<sub>max</sub>.</p>
Data from: High tolerance of tropical sapling growth and gas exchange to moderate warming
The effects of global warming on tropical forest growth and carbon storage are uncertain. While observations on canopy trees indicate negative correlations between temperature and growth, some seedling studies suggest the opposite. These contrasting results may reflect ontogenetic differences in temperature responses, or differences between the performance of potted plants under controlled conditions and plants under more variable conditions in the field. To try to bridge the gap between highly-controlled experiments on small seedlings and field observations on canopy trees we conducted two sets of outdoor experiments on saplings up to 2.5 m tall; one set to study the effects of night warming, and another set on the effects of day warming. To test the hypothesis that night warming would reduce growth in tropical saplings through stimulation of respiration, we grew the early-successional species Ochroma pyramidale in large 380-liter soil containers under ambient nighttime temperature and ambient +4.5°C. To test the hypothesis that day warming would reduce growth by reducing photosynthesis we compared plants in multi-species and single-species mesocosms rooted in the ground under ambient and passively warmed daytime conditions. In all experiments we monitored growth and measured foliar physiology and plant biomass allocation. Neither night warming nor day warming significantly affected biomass accumulation and allocation. Height growth increased with night warming in Ochroma pyramidale, but decreased with day warming in late-successional species. Night warming resulted in acclimation of dark respiration. Day warming resulted in acclimation of photosynthesis in early-successional species, but warming decreased photosynthesis in late-successional tree species. The seedling-to-sapling transition is a critical stage in the life of trees. We found no evidence that in this juvenile growth phase moderate increases in mean temperature reduce the performance of tropical trees, although increases in peak daytime temperature may negatively impact photosynthesis, especially in late-successional species.
Data on heat tolerance from: Field and laboratory studies reveal interacting effects of stream oxygenation and warming on aquatic ectotherms
<p>Heat tolerance data on two widespread Eurasian mayflies, <i>Ephemera danica</i>, Müller 1764 and <i>Serratella ignita</i> (Poda 1761).</p><p>Methods thermal tolerance experiments</p><p>Mayfly nymphs for laboratory experiments were collected in spring (early May) from Torrington River, Devon, UK, ranging in fresh weight between 15 and 128 mg (<i>E. danica</i>) and between 2.0 and 11.6 mg (<i>S. ignita</i>). Nymphs were maintained in the laboratory at 10 ± 1 °C in a 12 L:12 D regime in aquaria containing artificial pond water, buffered and diluted to reflect the pH and conductivity of the field site. Before recording critical temperatures, all species were acclimated for at least 7 days to laboratory conditions.</p><p>To assess critical thermal maxima (<i>CT</i>max), we employed previously described methods (Verberk & Bilton, <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.13240#gcb13240-bib-0051">2011</a>; Verberk & Calosi, <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.13240#gcb13240-bib-0054">2012</a>). Individual nymphs (<i>n</i> = 18 for <i>E. danica</i> and <i>n</i> = 27 for <i>S. ignita</i>) were placed in flow-through chambers and water was supplied to these chambers from a header tank after having passed through a tubular counter-current heat exchanger. Water in the header tank was of the same composition as that used to maintain animals and was bubbled with a mixture of 20% oxygen and 80% nitrogen, obtained using a gas-mixing pump (Wösthoff, Bochum, Germany). Individuals were left resting for 1 h at the equilibration temperature of 10 °C, after which temperature in the experimental chambers was increased by 0.25 °C min−1, using a Grant R5 water bath with a GP200 pump unit (Grant Instrument Ltd, Cambridge, UK), connected to the heat exchanger. Temperatures were logged using a HH806AU digital thermometer (Omega Engineering Inc., Stamford, CT, USA). Different sized flow-through chambers were used for each species. <i>E. danica</i> was placed in larger chambers (70 × 70 × 30 mm) and provided with sand as burrowing substrate, which they readily used. <i>S. ignita</i> was placed in smaller cylindrical chambers (6 mm in diameter, 20 mm long) and their behaviour was observed under a magnifying glass. The amount of water passing through these flow-through chambers was matched to their size. For the larger chambers containing <i>E. danica</i>, water was supplied to five chambers (total volume of 0.735 l) at a flow rates of 0.031–0.033 l per second, resulting in a refresh rate of 22–24 s. For the smaller chambers with <i>S. ignita</i>, water was supplied to each chamber individually at 0.21–0.22 ml per second, resulting in a refresh rate of 10–11 s.</p><p><i>CT</i>max is defined as the point at which an animal loses its ability to escape from conditions that will lead to its death (Lutterschmidt & Hutchison, <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.13240#gcb13240-bib-0027">1997</a>). During progressive warming, nymphs of <i>E. danica</i> first emerged from their burrowed position and began swimming (at about 6 °C below <i>CT</i>max). Loss of equilibrium occurred next as nymphs fell upon their backs, which was followed by the onset of spasms. After that, gill movement was no longer coordinated and faltered and this endpoint could be most reliably determined and is here taken as <i>CT</i>max. Similarly<i>, S. ignita</i> stopped ventilation and movement at <i>CT</i>max. Below <i>CT</i>max, larvae were inactive, until near the end of the trials, when they began to crawl, lose equilibrium and gill beating became intermittent shortly before stopping altogether at <i>CT</i>max.</p><p><i>CT</i>max was assessed at hypoxic (5 kPa), normoxic (20 kPa) and hyperoxic (60 kPa) conditions. Different levels of oxygenation were achieved by changing the oxygen–nitrogen gas mixture obtained using the gas-mixing pump (Wösthoff). The gas mixture was adjusted 10 min after placing the animals in the small flow-through chambers, to allow for gradual exposure to hypoxic and hyperoxic conditions during the 1 h resting period. To prevent equilibration with the atmosphere, the header tank was sealed using an 18 mm thick expanded polystyrene sheeting and other openings were closed off with plastic material. During the 1 h resting period, oxygen levels in the outflow water from the chambers were measured approximately every 15 min, to verify that the oxygen levels had stabilized to hypoxic, normoxic and hyperoxic conditions at the onset of warming. Because some equilibration with the atmosphere could not be prevented, nominal output values from the gas mixer were slightly more extreme (3 kPa for hypoxia and 65 kPa for hyperoxia) in order to achieve the desired oxygen conditions in the test chambers.</p>
Positive genetic covariance and limited thermal tolerance constrain tropical insect responses to global warming
<p>Tropical ectotherms are particularly vulnerable to global warming because their physiologies are assumed to be adapted to narrow temperature ranges. This study explores three mechanisms potentially constraining thermal adaptation to global warming in tropical insects: 1. tradeoffs in genotypic performance at different temperatures (the jack-of-all-trades hypothesis) 2. positive genetic covariance in performance, with some genotypes performing better than others at viable temperatures (the 'winner and 'loser genotypes hypothesis) or 3. limited genetic variation as the potential result of relaxed selection and the loss of genes associated with responses to extreme temperatures (the gene decay hypothesis). We estimated changes in growth and survival rates at multiple temperatures for three tropical rain forest insect herbivores (<i>Cephaloleia</i> rolled-leaf beetles, Chrysomelidae). We reared 2746 individuals in a full-sibling experimental design, at temperatures known to be experienced by this genus of beetles in nature (<i>i.e.</i>, 10-35°C). Significant genetic covariance was positive for 16 traits, supporting the 'winner and 'loser genotypes hypothesis. Only two traits displayed negative cross-temperature performance correlations. We detected a substantial contribution of genetic variance in traits associated with size and mass (0-44%), but low heritability in plastic traits such as development time (0-6%) or survival (0-4%). Lowland insect populations will most likely decline if current temperatures increase beyond 2°C. It is concerning that local adaption is already lagging behind current temperatures. The consequences of maintaining the current global warming trajectory would be devastating for tropical insects. However, if humans can limit or slow warming, many tropical ectotherms might persist in their current locations, and potentially adapt to warmer temperatures.</p>
Data from: The interaction of exposure and warming tolerance determines fish species vulnerability to warming stream temperatures
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.