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6 results for “Asymmetric resources”
Asymmetric responses of resource use efficiency to previous-year precipitation in a semi-arid grassland
<p>1. Intensified inter-annual fluctuations in precipitation could profoundly impact terrestrial ecosystems. However, how changes previous-year precipitation influence current ecosystem functioning (e.g., resource use efficiency) in semi-arid regions remains unclear.</p> <p>2. In this study, water use efficiency (WUE) and light use efficiency (LUE) were investigated in a multi-year precipitation gradient experiment with seven treatment levels: 20%, 40% and 60% decreases and 20%, 40% and 60% increases in the amount of natural rainfall plus ambient precipitation. Plots receiving 60% less precipitation were representative of extreme dry years whereas the other treatment levels fell within the normal year-to-year range in precipitation change. Measurements made in both the post-treatment period (2013-2015) and the treatment period (2010-2012) provided an opportunity to quantify the legacy effects of precipitation on resource use efficiency (RUE).</p> <p>3. Sensitivities of LUE to previous-year precipitation were not changed among treatments in 2013. However, asymmetric responses of RUEs (i.e., WUE and LUE) to previous-year precipitation were found in 2014-2015. WUE<sub>2014</sub>, WUE<sub>2015</sub>, LUE<sub>2014</sub>, and LUE<sub>2015</sub> responded more strongly to previous normal decreased than increased precipitation. Importantly, they were more sensitive to previous extreme dry year (represented by 60% precipitation reduction) than normal wet year (represented by 60% precipitation increment). Aboveground net primary productivity (ANPP) rather than resource absorption (R<sub>uptake</sub>) drove these asymmetric responses of RUE, and biomass of grasses further explained the asymmetric responses of ANPP.</p> <p>4. This study reveals the non-linear responses of RUE to previous-year precipitation and highlighted that the legacy effects of precipitation on RUE can be ascribed to the changes in vegetation composition. Our findings can facilitate the prediction of the legacy effects of precipitation variation on grassland ecosystem functions in the future.</p>
Asymmetric responses of resource use efficiency to previous-year precipitation in a semi-arid grassland
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Data from: Exotic flower visitors exploit large floral trait spaces resulting in asymmetric resource partitioning with native visitors
1.Exotic species often cause severe alterations in native communities due to their ability to rapidly and efficiently utilize a broad spectrum of resources. In flower-visitor interactions, the breadth of resource use by native and exotic animals as well as the partitioning of resources among them is often estimated based on the number of (shared) plant species used as resources. However, whether a flower visitor is able to exploit plant resources has been shown to be delimited by functional floral traits such as morphological barriers or attractive or repellent chemical cues. Each of the ecologically relevant traits can be viewed as a dimension of a Hutchinsonian n-dimensional hypervolume, which characterizes the range of phenotypes exploitable by a species. 2.In this study, we quantified the sizes and overlaps of n-dimensional hypervolumes defined by floral traits that are exploitable by native and exotic flower visitors (afterwards referred to as exploited space, ES). In the heavily invaded Hawai'i Volcanoes National Park, USA, we phenotyped 40 native and exotic plant species and recorded flower-visitor interactions. To quantify the size and overlap of ES, we applied dynamic range boxes (dynRB). 3.On average, exotic flower visitors were more generalized in resource use (larger ES) than natives ones, which is additionally indicated by the absence of native flower visitors on exotic flowering plant species. In particular, ES based on floral scent emission was larger for exotic flower visitors compared to native ones. The unevenly expanded ES of native and exotic animals led to an asymmetric overlap of floral ES where the exotic flower visitors shared only a small proportion of their ES with natives but occupied a large proportion of the ES of natives. 4.The asymmetry in resource use of native and exotic flower visitors suggests a potential advantage in resource exploitation of the latter, potentially explaining their success in Hawaiian ecosystems. Predicted range expansion of exotic plant and animal species may further increase the competition for and reduce the availability of resources for native animals. This may lead to further declines of native species and increasing threats for Hawaiian ecosystems.
Data from: Exotic flower visitors exploit large floral trait spaces resulting in asymmetric resource partitioning with native visitors
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Data from: Resource competition across habitat boundaries asymmetric interactions between benthic and pelagic producers
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Relationship Between Dopaminergic Asymmetric Degeneration and Attentional Resources in Parkinson's Disease.
ClinicalTrials.gov study NCT03476668. IPD Sharing: NO. Countries: 0. Publications: 0.
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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.