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75 results for “Soil variables”
Supplementary Data for Manuscript "Examining the mid to long-term variability in saturated hydraulic conductivity of sandy soils and its influencing factors under constant head test in the laboratory"
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Supplementary material 3 from: Niemi M, Pöyry J, Heiskanen I, Uotinen V, Nieminen M, Erkomaa K, Wallenius K (2014) Variability of soil enzyme activities and vegetation succession following boreal forest surface soil transfer to an artificial hill. Nature Conservation 8: 1-25. https://doi.org/10.3897/natureconservation.8.6369
Figure S2: Explanation note: The studied sites in August 2003: a) Top b) Grove c) Middle d) North.
Supplementary material 4 from: Niemi M, Pöyry J, Heiskanen I, Uotinen V, Nieminen M, Erkomaa K, Wallenius K (2014) Variability of soil enzyme activities and vegetation succession following boreal forest surface soil transfer to an artificial hill. Nature Conservation 8: 1-25. https://doi.org/10.3897/natureconservation.8.6369
Figure S3: Explanation note: The studied s ites in August 2005: a) Top b) Grove c) Middle d) North.
Supplementary material 1 from: Niemi M, Pöyry J, Heiskanen I, Uotinen V, Nieminen M, Erkomaa K, Wallenius K (2014) Variability of soil enzyme activities and vegetation succession following boreal forest surface soil transfer to an artificial hill. Nature Conservation 8: 1-25. https://doi.org/10.3897/natureconservation.8.6369
Table S1: Explanation note: Vegetation data used in the ordination analyses.
Tree seedling trait optimization and growth in response to local-scale soil and light variability
At local scales, it has been suggested that high levels of resources lead to increased tree growth via trait optimization (highly peaked trait distribution). However, this contrasts with (i) theories that suggest that trait optimization and high growth occur in the most common resource level and (ii) empirical evidence showing that high trait optimization can be also found at low resource levels. This raises the question of how are traits and growth optimized in highly diverse plant communities? Here, we propose a series of hypotheses about how traits and growth are expected to be maximized under different resource levels (low, the most common, and high) in tree seedling communities from a subtropical forest in Puerto Rico. We studied the variation in the distribution of biomass allocation and leaf traits and seedlings growth rate along four resource gradients: light availability (canopy openness) and soil K, Mg, and N contents. Our analyses consisted of comparing community trait means, trait kurtosis (a measurement of trait optimization), and relative growth rates at three resource levels (low, common, and high). Trait optimization varied across the three resource levels depending on the type of resource and trait, with leaf traits being optimized under high N and in the most common K and Mg conditions, but not at any of the light levels. Also, seedling growth increased at high light conditions and high N and K but was not related to trait kurtosis. Our results indicate that local-scale variability of soil fertility and understory light conditions result in shifts in species ecological strategies that increase growth despite a weak trait optimization, suggesting the existence of alternative phenotypes that achieve similar high performance. Uncovering the links between abiotic factors, functional trait diversity and performance is necessary to better predict tree responses to future changes in abiotic conditions.
Interspecific trait variability and local soil conditions modulate grassland model community responses to climate
<p><span><span><span><span><span><span><span><span><span><span><span><b> </b>High elevation grasslands provide critical services in agriculture and ecosystem stabilization. However, these ecosystems face elevated risks of disturbance due to predicted soil and climate changes. We experimentally exposed model grassland communities, comprised of three species grown on either local or reference soil, to varied climatic environments along an elevational gradient in the European Alps, measuring the effects on species and community traits. Although species-specific biomass varied across soil and climate, species' proportional contributions to community-level biomass production remained consistent. Where species experienced low survivorship, species-specific biomass production was maintained through increased production of surviving individuals. Species responded directionally to climatic variation, segregating differentially by plant traits (including height, reproduction, biomass, survival, leaf dry weight, and leaf area) across all sites. Local soil variation drove stochastic trait responses across all species. This soil variability obscured climate-driven responses: we recorded no directional trait responses driven by climate. Our species-based approach contributes to our understanding of grassland community stabilization and suggests that these communities show some stability under climatic variation. </span></span></span></span></span></span></span></span></span></span></span></p>
Daily Averaged Soil State Variables and Daily Percolation Volumes from Three Experimental Plots (Soil Covers): 2018-2021
<p>This dataset provides daily measurements of soil state variables and percolation volumes collected from 2018 to 2021 in experimental plots designed to resemble landfill final covers. The data encompasses three plots located in Drummondville, Quebec, Canada, labeled as E1, E2, and E3. Two types of data are presented: daily percolation volumes and soil state variables. For the percolation volumes, each measurement corresponds to the daily percolation volume in mm/day from pan lysimeters in each plot. The soil state variables include daily soil volumetric water content and soil temperature at a depth of 7.5 cm, measured using 5TM sensors in each plot. Missing data is noted with <code>NaN</code> values.</p>
Data from: Variability in potential to exploit different soil organic phosphorus compounds among tropical montane tree species
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Data from: Spatial-temporal variability and related factors of soil organic carbon in Henan province
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Interspecific trait variability and local soil conditions modulate grassland model community responses to climate
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What are the most crucial soil variables for predicting the distribution of mountain plant species? a comprehensive study in the Swiss Alps
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Data from: The roles of interspecific variability in seed mass and soil resource availability in root system development
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Abundance of trees and seedlings, climatic, and soil variables in 36 20x20 m permanent plots in peri-urban Andean forests of Colombia
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Tree seedling trait optimization and growth in response to local-scale soil and light variability
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Inter-annual precipitation variability alters the effects of soil resource enrichment and mycorrhizal suppression on plant communities in desert steppe
<p><strong>Questions:</strong> In desert steppes, plant community productivity and species composition are primarily co-limited by soil water and nitrogen availability. However, how the addition of resources and arbuscular mycorrhizal fungi interactively influence plant community performance has not been investigated in detail.</p> <p><strong>Location: </strong>Desert steppe, China.</p> <p><strong>Methods:</strong> We performed a field study to examine the effects of levels of increased water, nitrogen and arbuscular mycorrhizal (AM) fungal suppression on plant communities in 2 year with contrasting inter-annual precipitation variability in desert steppe.</p> <p><strong>Results:</strong> We found that inter-annual precipitation variability altered plant community composition and productivity in responses to water and nitrogen addition and mycorrhizal suppression. AM fungal suppression had few effects on aboveground plant productivity, whereas the primary effects of water and nitrogen addition were significant across all two years. The addition of water and nitrogen altered plant community composition and productivity primarily by increasing the abundance and biomass of annual species only in normal year (2019), but decreasing the abundance of perennial grasses regardless of the presence of AM fungi across two years with contrasting precipitation conditions. Moreover, the addition of water alone slightly increased the species richness and Shannon diversity compared with the control.</p> <p><strong>Conclusions:</strong> Our findings highlight the importance of inter-annual precipitation variability rather than that of soil resource enrichment and plant–arbuscular mycorrhizal fungi interactions in plant community composition within the desert steppe.</p>
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OpenNeuro
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