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8 results for “legacy nutrient”
WAT04 Root decomposition and nutrient dynamics are resistant to rainfall legacies in tallgrass prairie
Purpose: Litter decomposition is an important component of carbon (C) and nitrogen (N) cycling, and rates of mass loss and nutrient release are sensitive to current climate conditions. Growing evidence suggests that past climate conditions can exert legacies on soil C and N cycling, but little is known about how belowground decomposition dynamics relate to these climate legacies. Results: Root litter mass loss was resistant to most climate treatments. Contrary to expectations, decomposition rates were slowest in plots with a history of long-term irrigation and fastest under drought in lowland prairie. Similarly, mass loss rates were overall faster in the drier uplands. Changes in N concentration as a function of mass loss were similar across treatments and patterns of litter N release largely tracked mass loss. Conclusions: Changes in the decomposer community with long-term release from water stress may have led to slowed root decomposition, but these effects were subtle. Our results suggest that changes in decomposition rates are not a cause of observed climate legacy effects on C and N cycling in prairies.
Data from: Local soil legacy effects in a multi-species grassland community are underlain by root foraging and soil nutrient availability
<p>1. Plant soil legacies consisting of species-specific microbial communities are hypothesized to play a critical, structuring role in plant species co-existence processes. Plant species are thought to perform worse on soil conditioned by the same species compared to soil of other species, which serves as a self-limitation mechanism and averts mono-dominance of strong competitors. Here we test in a multi-species community setting, whether root colonisation and resource utilisation of soil patches with distinct soil legacies, are consistent with this hypothesis. 2. We grew eight grassland species together in an outdoor mesocosm setup in unconditioned soil and created soil patches in these communities conditioned by one of four plant species, or a soil mixture of all four. During two subsequent growing seasons, we tested the effect of these conditioned soil patches on belowground root colonisation into the patches of each surrounding plant species using a novel sequencing based approach. In addition, we tested the effect of soil conditioning on local root functioning by injecting tracers into the soil patches and measuring the recovery in aboveground biomass. 3. Against expectations, plant species did not place less roots in own soil patches compared to foreign soil patches, nor did species take up less tracer from own compared to foreign soil patches. Using structural equation modelling, we found that tracer uptake of the plant species was to a varying degree explained by root densities in the various soil patches and by differing soil nutrient availability of the soil patches. We conclude that soil legacy effects are inextricably connected to soil nutrient availability, which needs to be taken into account in plant-soil feedback research to understand the processes that shape plant communities. 4. Synthesis. We found that soil legacy effects in complex, multi-species semi-field conditions did not match expectations based on theory and experiments in controlled conditions. Among the many complicating factors that may modify or even overrule soil legacy effects in semi-field settings, we identified soil nutrient availability as a critical force that may, together with soil biota, shape plant species co-existence processes.</p>
Database-for-cross-country-regional-active-and-legacy-nutrient-source-attribution
<p>This dataset contains nutrient concentration (TN/NH3-N, TP) and water discharge data from Australia, China, Sweden, and the USA.<br>Each country's data is organized into subfolders based on the respective country.</p><p>Data Sources:<br>The data were collected from water quality monitoring agencies, research institutions, and public data sources in each respective country. The data sources for each country are as follows:<br>Australia: Retrieved from <a href="https://data.water.vic.gov.au/">https://data.water.vic.gov.au/</a><br>China: Retrieved from the Ministry of Ecology and Environment of the People's Republic of China (nutrient concentration) and the Hydrological Year Book (water discharge).<br>USA: Retrieved from <a href="https://doi.org/10.5066/P948Z0VZ">https://doi.org/10.5066/P948Z0VZ</a><br>Sweden: Retrieved from <a href="https://doi.org/10.5281/zenodo.7433379">https://doi.org/10.5281/zenodo.7433379</a></p><p>Data Formats and contents:<br>The data in each subfolder are stored in TXT or Excel formats.<br>TXT Files: These files are named by monitor station ID and include monitor time, nutrient data, water discharge data, and corresponding units.<br>Excel Files: These files contain information about the location of the monitoring stations and maps of the catchment areas.</p><p>To align with the source data, please be aware that the units for nutrient concentration and water discharge data may vary for each country.</p>
Data from: Local soil legacy effects in a multi-species grassland community are underlain by root foraging and soil nutrient availability
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Plant community legacy effects on nutrient cycling, fungal decomposer communities and decomposition in a temperate grassland
<p>Soil legacies mediated by plant species-specific microbial communities are major drivers of plant community dynamics. Most soil legacy studies focus on the role of pathogens and mutualists in driving these processes, while much less is known about plant litter-mediated changes to the soil microbial community. Here, we used an existing plant-soil feedback field experiment in which plant communities with different growth strategies (i.e., fast versus slow) and different proportions of functional groups (grasses versus forbs) were allowed to condition the soil over contrasting temporal scales (i.e., one versus two years) in a natural grassland. In the feedback phase, we removed the existent plant community, and replaced it with a standardized response plant community. We then tested the legacy effects of these different soil conditioning treatments on decomposition processes, nutrient cycling and soil decomposer community composition. Soil legacy effects on decomposition and the soil decomposer community composition were most evident right after the start of the feedback phase, but disappeared soon after the new community established. The soil conditioning time and years since disturbance affected most of the soil functions consistently, while no strong effects of plant functional group and plant growth strategy were found. We conclude that after disturbance, it is recovery time, not soil legacy effects, that is the most important factor driving soil functions.</p>
Data from: Importance of soil legacy effects and successful mutualistic interactions during Australian acacia invasions in nutrient poor environments
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Plant community legacy effects on nutrient cycling, fungal decomposer communities and decomposition in a temperate grassland
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50-year fire legacy regulates soil microbial carbon and nutrient cycling responses to new fire
GEO Series GSE274211. soil metagenome. 39 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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OpenNeuro
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