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51 results for “Arid ecosystem”
Indicative distribution map for Ecosystem Functional Group F1.6 Episodic arid rivers
<p>This archive contains indicative distribution maps and profiles for <strong>F1.6 Episodic arid rivers</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Indicative distribution map for Ecosystem Functional Group TF1.5 Episodic arid floodplains
<p>This archive contains indicative distribution maps and profiles for <strong>TF1.5 Episodic arid floodplains</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Indicative distribution map for Ecosystem Functional Group T5.5 Hyper-arid deserts
<p>This archive contains indicative distribution maps and profiles for <strong>T5.5 Hyper-arid deserts</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Thirty-eight years of CO 2 fertilization have outpaced growing aridity to drive greening of Australian woody ecosystems
<p>Data and code for "Thirty-eight years of CO 2 fertilization have outpaced growing aridity to drive greening of Australian woody ecosystems"</p>
Simulated climate change reduced the capacity of lichen-dominated biocrusts to act as carbon sinks in two semi-arid Mediterranean ecosystems
<p> Biocrust gas exchange measurements used as input data for this study. The methods are described in detail in the related identifier paper.</p>
Spring Precipitation Amount and Timing Predict Restoration Success in a Semi-Arid Ecosystem Code and Data
<table> <tbody> <tr> <td>The data here is summary data compiled from all years of the project that lead to the publication Spring Precipitation Amount and Timing Predict Restoration Success in a Semi-Arid Ecosystem with the Journal of Applied Ecology and code to analyze these data. Our study was focused on the Northern Great Basin ecosystem. We conducted surveys at 48 sites over the course of five years (2016-2020). All were located on public lands managed by either the Bureau of Land Management, Idaho Department of Lands, or Oregon State Lands Department. We looked at the influence of management, biotic, abiotic and weather variables predicting seedling establishment success, 45 predictor variables in all. Machine learning techniques were used to select most important predictor variables to be used in future work predicting good seedling establishment windows. </td> </tr> </tbody> </table>
Data for Holdrege et al: Precipitation intensification increases shrub dominance in arid, not mesic, ecosystems
<p>Data and code for the Holdrege et al. (2022) manuscript entitled 'Precipitation intensification increases shrub dominance in arid, not mesic, ecosystems' published in <em>Ecosystems </em>(doi: 10.1007/s10021-022-00778-1). This repository contains the results from simulations of sagebrush dominated plant communities conducted across 200 sites in the western United States. Simulations were run for ambient conditions as well as increased precipitation intensity and warming. Refer to the manuscript for details on the methods. This repository contains the summarized model output (data) and the R code that uses this data to compute the statistics and create the figures presented in the manuscript. See the README.md and data_dictionary.md files for more information on the code and data, respectively. Note, the .git subfolder provided here contains the git (version control history) files, and the users can ignore these. </p>
Figure 1 in Plant diversity in Sabkha ecosystems of arid region: spatial and environmental drivers
Figure 1. The first two axes of canonical analysis of principal coordinates based on discriminant analysis (CAP) of plant species composition in the three Sabkha ecosystems. Ash: Al-Oshaziyah; Qas: Qasab; Shaq: Shaqa. F-value= 2.879 and P-value=0.003 of the CAP model.
Data from: Does pH matter for ecosystem multifunctionality? An empirical test in a semi-arid grassland on the Loess Plateau
<p>Date of data collection: 2016-2018</p> <p>Geographic location of data collection: Guyuan, Ningxia, China (106°23′E, 36°15′N)</p> <p>These data were generated to (<em>i</em>) investigate the responses of soil properties, biological communities and multifunctionality to decreased soil pH; (<em>ii</em>) determine the potential biotic and abiotic pathways that soil pH may drive multifunctionality. In 2016, a 17 m × 40 m semi-arid grassland plot with an initial pH value of 8.05 and uniform vegetation was selected. The experiment was granted by the administration of Yunwu Mountain National Nature Reserve. A randomized block design was used with five treatments and six replicates per treatment. A total of 30 plots were established. All plots were 2 m × 2 m and separated by 1 m buffer zones. The treatments included five levels of acid addition rate (0, 0.23, 0.56, 3.60, and 9.01 mol H<sup>+</sup> m<sup>-2</sup>) in the form of sulphuric acid solution. In late August 2017, the plant communities achieved their peak biomass, and were surveyed and harvested in a 0.5 m × 1 m quadrat in each plot to determine the plant community diversity and estimate above-ground biomass. After harvesting the plants, six soil cores (0-15 cm deep, 2.5 cm diameter) per plot in each of the six blocks were collected and pooled by plot as a replicate for further chemical analyses.</p>
The data for the article entitled "Nitrogen deposition drives response and recovery to precipitation change and its reversal in an arid ecosystem""
<p><strong>Title:</strong> Nitrogen deposition drives response and recovery to precipitation change and its reversal in an arid ecosystem</p> <p>Yu et al.</p> <p>Document 1: Data on plant community traits.</p> <p>Document 2: Data on soil features.</p>
Effect of drought and nutrient availability on invaded plant communities in a semi-arid ecosystem
<p><span>Ecosystem functions are heavily dependent on the functional composition of the plant community, i.e., the functional traits of plants forming the community. This, on the one hand, depends on plant occurrence, but on the other hand depends on the intraspecific variability of functional traits of the species, which are influenced by climate and nutrient availability and affected by plant-plant interactions. To illustrate that, we studied the effects of drought and nitrogen addition (+ N), two important abiotic variables which are changing with ongoing global change, as well as their combined effect on the functional responses of grassland communities in semi-arid environments of Northern Africa comprising of natural and invasive species. We conducted a plot plant experiment where we planted three native species and one invasive plant species in artificial communities as of 5 individuals per species per plot. We exposed these communities to four different treatments: a drought treatment, a N-addition treatment, the combination between drought and N-addition as well as a control. To assess the performance of plants within treatments, we measured selected plant functional traits (plant height, specific leaf area (SLA), leaf dry matter content (LDMC), N content of the leaves (Nmass), specific root length (SRL) and root diameter) for all individuals occurring in our plots, and additionally assessed the above and belowground biomass for each plant individual. We found that the invasive species showed a higher performance (higher biomass accumulation, taller plants, higher SLA, Nmass, SRL and root diameter as well as lower LDMC) than the native species under drought conditions. The invasive species was especially successful with the combined impact of drought + N, which is a likely scenario in ongoing global change for our research area. Thus, plant functional traits might be a key factor for invasion success of plant species which will be even more pronounced under ongoing global change.</span></p>
The data for the article entitled "Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem"
<p>The data for the article entitled "Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem" Yu et al. </p>
Ecosystem stability is determined by plant defense functional traits and population stability under mowing in a semi-arid temperate steppe
<ol> <li><span>As a common grassland management practice in many high-latitude regions worldwide, mowing has great impacts on grassland functioning and stability. Species richness, species asynchrony and species stability have been suggested as central in responses to environmental change. Mowing can evoke plant defense systems due to physical damages to plants. However, no studies have comprehensively evaluated the role of plant defense functional traits, species richness, species asynchrony and stability in ecosystem functioning under mowing regimes across time-scales. </span></li> <li> <span>In the present study, we set up short-term (4-years) and long-term (16-years) mowing experiments with three stubble heights (control, 10 cm, 2 cm) in a temperate steppe of Inner Mongolia. We investigated the effects of mowing-induced changes in distribution metrics associated with plant defense traits, i.e. mean, variance, skewness and kurtosis of trait distribution, on ecosystem stability of grassland communities using structural equation modeling.</span> </li> <li><span>We found that grassland ecosystem stability was enhanced by increasing mowing duration and decreasing stubble height. Mowing-induced increases in abundance and diversity of plant defense traits contributed to greater ecosystem stability by enhancing species asynchrony and population stability. Moreover, we found that mowing enhanced the abundance and diversity of plant defense traits of dominant species and contributed to population stability and species asynchrony, thus enhancing temporal stability of grassland ecosystems. </span></li> <li><span>These results demonstrate the important roles of plant defense traits in maintaining stability of grasslands under mowing, and highlight that, in addition to species richness, asynchrony and population stability, plant functional defense trait act in stabilizing ecosystem functions under human-induced environmental changes.</span></li> </ol>
Ecosystem stability is determined by plant defense functional traits and population stability under mowing in a semi-arid temperate steppe
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Effect of drought and nutrient availability on invaded plant communities in a semi-arid ecosystem
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Data from: Neighbourhood-dependent root distributions and the consequences on root separation in arid ecosystems
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Ecosystem shifts and Cladocera responses in a freshwater lake in semi-arid regions: The successional synergistic effects of natural and human factors in the past 170 years
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Data from: Livestock grazing regulates ecosystem multifunctionality in semi‐arid grassland
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Dominant species drive ecosystem multifunctionality under changed precipitation timing in a semi-arid steppe
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Data from: Does pH matter for ecosystem multifunctionality? An empirical test in a semi-arid grassland on the Loess Plateau
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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)
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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.