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48 results for “Biomass allocation”
Biomass allocation in response to salinity and competition in native and invasive species
<p>Biomass allocation to different plant parts affects the subsequent capture rate of resources and reproduction. Thus, many studies have been conducted on the biomass allocation to learn growth, reproduction and competitive ability of plants. However, few researches have explored how biomass allocation responses to non-resource factor and interspecific competition over time. We experimentally investigated the effects of soil salinity and competition on root:shoot ratio (RS), reproductive effort (RE; seed biomass:total biomass ratio), the relationship between belowground and aboveground biomass, the relationship between reproductive and vegetative biomass, growth, and reproduction of invasive Spartina alterniflora and native Phragmites australis. The biomass of P. australis decreased with increasing salinity, whereas that of S. alterniflora did not significantly change. The reproduction of P. australis decreased with increasing salinity under competitive conditions, and that of S. alterniflora increased. Therefore, P. australis was less-tolerant, and S. alterniflora was more-tolerant. The RS of P. australis increased over time under competitive conditions and with increasing salinity, and that of S. alterniflora did not significantly change. The RE of P. australis decreased to zero with decreasing total biomass, and that of S. alterniflora did not significantly correlate with total biomass. Both species exhibited a linear relationship between belowground and aboveground biomass. The relationship between reproductive and vegetative biomass in P. australis was linear, and the reproductive biomass of S. alterniflora did not significantly correlate with the vegetative biomass. Competitive dominance shifted from P. australis to S. alterniflora with increasing salinity. The findings demonstrated that the plastic biomass allocation of less-tolerant species facilitates performance of less-tolerant species in favorable environments, while the fixed biomass allocation of more-tolerant species facilitates performance of more-tolerant species in stressful environments, suggesting that S. alterniflora invasion driven by competitive exclusion probably occur in high salinity zones, and reproductive ability of invasive species should be relatively stronger during exclusion. More broadly, linking level of environmental stresses with tolerance of plants is crucial to understanding and predicting the biomass allocation and its effects on plant performance, which is an expansion of predictions from optimal theory and allometric theory and therefore illustrates the conditionality of these predictions.</p>
Data from: Effects of increased N and P availability on biomass allocation and root carbohydrate reserves differ between N‐fixing and non‐N‐fixing savanna tree seedlings
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Reproductive allocation in plants in terms of biomass, energy or nutrients
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Data from: Recombinant DNA modification of gibberellin metabolism alters growth rate and biomass allocation in Populus
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Biomass allocation in response to salinity and competition in native and invasive species
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Biomass Allocation and Growth Data of Seeded Plants
This data set of leaf, stem, and root biomass for various plant taxa was compiled from the primary literature of the 20th century with a significant portion derived from Cannell (1982). Recent allometric additions include measurements made by Niklas and colleagues (Niklas, 2003). This is a unique data set with which to evaluate allometric patterns of standing biomass within and across the broad spectrum of vascular plant species. Despite its importance to ecology, global climate research, and evolutionary and ecological theory, the general principles underlying how plant metabolic production is allocated to above- and below-ground biomass remain unclear. The resulting uncertainty severely limits the accuracy of models for many ecologically and evolutionarily important phenomena across taxonomically diverse communities. Thus, although quantitative assessments of biomass allocation patterns are central to biology, theoretical or empirical assessments of these patterns remain contentious.
Data from: Soil carbon accumulation differences: allocation of visible plant biomass, carbon and nitrogen in two turfgrasses
<p><span>Carbon accumulation in turfgrass soils by plant material may be beneficial to CO<sub>2</sub> sequestration and soil health, but at high rates can easily lead to declined turfgrass quality (i.e. thatch and mat layer formation). In a field study it was investigated how the fraction of visible plant biomass of turfgrass (sub)species monocultures, with two or three varieties as monoculture per (sub)species, and its C and N concentration and CN ratio in this visible plant biomass in thatch, mat and soil layers contributes to C accumulation. In total three <em>Festuca rubra</em> subspecies; <em>Festcua rubra commutata</em> (Frc), <em>Festuca rubra trichophylla </em>(Frt), <em>Festuca rubra rubra</em> (Frr), and three Agrostis species; <em>Agrostis canina</em> (Acn), <em>Agrostis capillaris</em> (Acp), Agrostis stolonifera (As), were studied. The study was conducted on 3 years old turfgrass demonstration fields of two turfgrass seed companies: <em>Festuca rubra</em> subspecies samples were collected at a site of Barenbrug in Wolfheze (52°00´N, 5°46´E), and <em>Agrostis </em>species were sampled at a site of DLF in Moerstraten (51°32´N, 4°20´E), both in the Netherlands. Both sites were built on a sandy soil. </span></p> <p><span>For every variety, cores of the top 20 cm of the soil including aboveground biomass were taken with a core sampler (diameter 28 mm). The core was immediately divided into 4 distinctive layers, thatch + aboveground biomass, mat, remaining upper 10 cm soil and 10-20 cm soil. Distinction of these layers followed the protocol of Evers et al. (2024). </span><span>Aboveground biomass was separated from the thatch with scissors. Sediment from thatch, mat, remaining upper 10 cm of soil and 10-20 cm soil was carefully washed out with tap water, after which the remaining below-ground (dead and living) visible plant biomass and aboveground biomass was dried at 65 °C until stable weight and weighed. Total C and N analyses were carried out with a Vario Micro Cube Element Analyzer (Elementar, Langenselbold, Germany), from which C and N concentrations (in % of dry matter of plant biomass) and C to N ratios (CN ratio) were calculated.</span></p>
Data from: Responses of biomass allocation across two vegetation types to climate fluctuations in the northern Qinghai-Tibet 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.
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DANDI Archive for NWB datasets
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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.