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142 results for “biomass production”
Magnitude and mechanisms of nitrogen-mediated responses of tree biomass production to elevated CO2: a global synthesis
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Phenological changes offset the warming effects on biomass production in an alpine meadow on the Qinghai-Tibetan Plateau
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What drives temporal stability of biomass production? Testing the roles of species diversity, dominance, asynchrony and spatial scale in annual plant communities
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Data from: Biomass production and stability of five energycane cultivars at two latitudes in Georgia, USA
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Data from: Impacts of mixed-grazing on root biomass and belowground net primary production in a temperate desert steppe
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Data from: Litter removal in a tropical rain forest reduces fine root biomass and production but litter addition has few effects
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Process development and analyses for the co-production of 2-methyltetrahydrofuran and 1,4-pentanediol from lignocellulosic biomass
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Biomass allocation and productivity–richness relationship across four grassland types at the Qinghai Plateau
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Data from: Impacts of biomass production at civil airports on grassland bird conservation and aviation strike risk
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Energy consumption and greenhouse gas emissions data of activated carbon production using different biomass
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Disentangling the effects of biomass and productivity in plant competition
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Effect of recovery period of mixture pasture on cattle behaviour, pasture biomass production, and pasture nutritional value
<p>This document provides the brief description of the statistical analysis for the research article entitled “Effect of recovery period of mixture pasture on cattle behaviour, pasture biomass production, and pasture nutritional value” published at Animal: An International Journal of Animal Bioscience. The study was designed to evaluate three different recovery periods of mixed grasses on the grazing behaviour of heifers, as well as herbage selectivity, herbage yield and nutritional value, <em>in vitro </em>degradability, and<em> </em>CH<sub>4</sub> production. The three pasture recovery periods (RP) of 24, 35 and 46 days were evaluated in six blocks using a randomized block design. At each predetermined recovery period, samples of the pasture were taken before the animals were allowed to graze using the square method. Right after collecting the pasture samples, a group, out of three, of six heifers accessed the pasture during four consecutive hours for grazing simulation and behavioural observations. The three groups of heifers were scheduled to be used in accordance with a systematic distribution and the pre-determined RP. The groups went through all the blocks according to the RP and the 3x3 double Latin Square design. A sample scan from each animal was taken every 10 min for behavioural observations and grazing simulations was taken through the hand-plucking technique. The bite rate of each animal was also measured five times each hour for 30 seconds each, and then one value per group was calculated. Statistical analyses were performed in R Core Team (2018). Additional information is provided in the paper “Effect of recovery period of mixture pasture on cattle behaviour, pasture biomass production, and pasture nutritional value”.</p>
Data from: Woody plant biomass and carbon exchange depend on elephant-fire interactions across a productivity gradient in African savanna
Elephants and fire are individually well-known disturbance agents within savanna ecosystems, but their interactive role in governing tree-cover dynamics and savanna–forest biome boundaries remains unresolved. Of central importance are the mechanisms by which elephants vs. fire affect tree biomass and cover, and how – over long time periods – both factors interact with rainfall and soils to govern tree biomass and carbon dynamics. Here, we evaluated the response of woody vegetation to 56 years of fire manipulation in South Africa's Kruger National Park, with three fire regimes (annual, triennial and unburned) replicated across a productivity gradient and subject to two periods of contrasting elephant abundances (generated by the cessation of culling in 1994). Higher fire frequencies had a negative effect on woody biomass in the low-elephant period, but this effect was weak to negligible in the high-elephant period as the difference among fire treatments diminished. Moreover, elephants removed increasing amounts of woody biomass as productivity increased across study sites, but fire did not. We infer that elephant-induced tree mortality could overcome increases in woody-plant productivity, while fire-induced mortality alone could not. Elephants caused woody-plant carbon to shift from a sink to a source; this effect was independent of fire treatment, with highest rates of net carbon removal in the wettest and most productive site. Synthesis. Our results reveal a context-dependent interaction between fire and elephants as disturbance agents in savanna: the influence of fire on woody plants was sensitive to the abundance of elephants and diminished with increased plant productivity. In contrast, elephants were capable of shifting landscapes from relatively dense woodland to open savanna, even in unburned sites, and exerted strong impacts irrespective of site conditions and plant productivity.
Data from: Species richness and the temporal stability of biomass production: a new analysis of recent biodiversity experiments
The relationship between biological diversity and ecological stability has fascinated ecologists for decades. Determining the generality of this relationship, and discovering the mechanisms that underlie it, are vitally important for ecosystem management. Here, we investigate how species richness affects the temporal stability of biomass production by re-analyzing 27 recent biodiversity experiments conducted with primary producers. We find that, in grasslands, increasing species richness stabilizes whole-community biomass but destabilizes the dynamics of constituent populations. Community biomass is stabilized because species richness impacts mean biomass more strongly than its variance. In algal communities, species richness has a minimal effect on community stability because richness affects the mean and variance of biomass nearly equally. Using a new measure of synchrony among species, we find that for both grasslands and algae, temporal correlations in species biomass are lower when species are grown together in polyculture than when grown alone in monoculture. These results suggest that interspecific interactions tend to stabilize community biomass in diverse communities. Contrary to prevailing theory, we found no evidence that species' responses to environmental variation in monoculture predicted the strength of diversity's stabilizing effect. Together, these results deepen our understanding of when and why increasing species richness stabilizes community biomass.
Data from: Species richness, but not phylogenetic diversity, influences community biomass production and temporal stability in a re-examination of 16 grassland biodiversity studies
1.Hundreds of experiments have now manipulated species richness of various groups of organisms and examined how this aspect of biological diversity influences ecosystem functioning. Ecologists have recently expanded this field to look at whether phylogenetic diversity among species, often quantified as the sum of branch lengths on a molecular phylogeny leading to all species in a community, also predicts ecological function. Some have hypothesized that phylogenetic divergence should be a superior predictor of ecological function than species richness because evolutionary relatedness represents the degree of ecological and functional differentiation among species. But studies to date have provided mixed support for this hypothesis. 2.Here, we re-analyze data from 16 experiments that have manipulated plant species richness in grassland ecosystems and examined the impact on aboveground biomass production over multiple time points. Using a new molecular phylogeny of the plant species used in these experiments, we quantified how the phylogenetic diversity of plants impacts average community biomass production as well as the stability of community biomass production through time. 3.Using four complementary analyses we show that, after statistically controlling for variation in species richness, phylogenetic diversity (the sum of branches in a molecular phylogenetic tree connecting all species in a community) is neither related to mean community biomass nor to the temporal stability of biomass. These results run counter to past claims. However, after controlling for species richness, phylogenetic diversity was positively related to variation in community biomass over time due to an increase in the variances of individual species, but this relationship was not strong enough to influence community stability. 4.In contrast to the non-significant relationships between phylogenetic diversity, biomass, and stability, our analyses show that species richness per se tends to increase the mean biomass production of plant communities, after controlling for phylogenetic diversity. The relationship between species richness and temporal variation in community biomass was either positive, non-significant or negative depending on which analysis was used. However, the increases in community biomass with species richness, independently of phylogenetic diversity, always led to increased stability. These results suggest that phylogenetic diversity is no better as a predictor of ecosystem functioning than species richness. 5.Synthesis. Our study on grasslands offers a cautionary tale when trying to relate phylogenetic diversity to ecosystem functioning suggesting that there may be ecologically important trait and functional variation among species that is not explained by phylogenetic relatedness. Our results fail to support the hypothesis that the conservation of evolutionarily distinct species would be more effective than the conservation of species richness as a way to maintain productive and stable communities under changing environmental conditions.
Dataset "Combining biomass gasification and LOHC mixed gas hydrogenation for high purity hydrogen production and storage"
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Self-sacrificing and self-supporting biomass carbon anode assisted water electrolysis for low-cost hydrogen production
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Data from: Woody plant biomass and carbon exchange depend on elephant-fire interactions across a productivity gradient in African savanna
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Data from: Conservative species drive biomass productivity in tropical dry forests
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Data from: Species richness and the temporal stability of biomass production: a new analysis of recent biodiversity experiments
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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.