Shifts in soil ammonia‐oxidizing community maintain the nitrogen stimulation of nitrification across climatic conditions

Global Change Biology, Journal Year: 2023, Volume and Issue: 30(1)

Published: Oct. 27, 2023

Abstract Anthropogenic nitrogen (N) loading alters soil ammonia‐oxidizing archaea (AOA) and bacteria (AOB) abundances, likely leading to substantial changes in nitrification. However, the factors mechanisms determining responses of AOA:AOB nitrification N are still unclear, making it difficult predict future Herein, we synthesize 68 field studies around world evaluate impacts on ammonia oxidizers Across a wide range biotic abiotic factors, climate is most important driver loading. Climate does not directly affect N‐stimulation nitrification, but so via climate‐related shifts AOA:AOB. Specifically, modulates by affecting pH, N‐availability moisture. AOB play dominant role dry climates, while from AOA can exceed humid climates. Together, these results suggest that community maintain highlighting importance microbial composition mediating cycle

Language: Английский

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Simulating the Role of Biogeochemical Hotspots in Driving Nitrogen Export From Dryland Watersheds

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(3)

Published: March 1, 2024

Abstract Climate change and nitrogen (N) pollution are altering biogeochemical ecohydrological processes in dryland watersheds, increasing N export, threatening water quality. While simulation models useful for projecting how export will the future, most ignore “hotspots” that develop drylands as moist microsites soil become hydrologically disconnected from plant roots when soils dry out. These hotspots enable to accumulate over periods rapidly flush streams wet up. To better project future we developed a framework representing using model RHESSys. We then conducted series of virtual experiments understand uncertainties structure parameters influence streams. Modeled was sensitive three major factors (a) abundance watershed: increased linearly reached an asymptote with hotspot abundance; this occurred because carbon inputs eventually became limiting displaced vegetation cover, (b) moisture threshold required subsurface flow reestablish: peak streamflow decreased due tradeoffs between accumulation occur increasingly hotspots, (c) rate at which diffused out dried down: generally higher slow more could periods, be flushed onset rain. In case study, found were modeled explicitly, nitrate by 29%, enabling us capture timing magnitude losses observed field. further response interannual precipitation variability, particularly multiple years followed year. This modeling can improve projections watersheds where play important role

Language: Английский

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Widening global variability in grassland biomass since the 1980s

Nature Ecology & Evolution, Journal Year: 2024, Volume and Issue: 8(10), P. 1877 - 1888

Published: Aug. 5, 2024

Language: Английский

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Nitrogen and Metal Ions Accumulation in Two Sensitive Himalayan Lichens From Western Nepal: A Reference for Ecosystem Health Monitoring

Journal of Chemistry, Journal Year: 2025, Volume and Issue: 2025(1)

Published: Jan. 1, 2025

In this study, thalli nitrogen (N) and metal ions contents in the two fruticose lichens ( Ramalina intermedia Usnea cornuta ) were quantified, which collected from a pristine Himalayan forest of Shey Phoksundo National Park western Nepal. Besides, probable impacts N physicochemical responses such as electrical conductivity, chlorophyll contents, degradation studied. Our initial hypothesis was there are considerable amounts thallus study area, it has substantial on responses. comparison, concentration observed to be greatest R. (0.24%–1.15%). However, comparable both lichen species observed. Regression analysis revealed least or no The principal component suggests contribution different environmental variable their correlation with lichen’s variables. This provides evidence only minor integrity sensitive our area. is likely contribute field‐based reference information for further studies species‐specific accumulation systems monitor ecosystem health.

Language: Английский

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Alleviation of Nutrient Co-limitation Increases Grassland Biomass Production, But Not Carbon Storage

Ecosystems, Journal Year: 2025, Volume and Issue: 28(1)

Published: Jan. 8, 2025

Language: Английский

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The Effects of Nutrient and Water Use Efficiency on Plant Species Diversity in the Understory of Broad-Leaved Evergreen Forests

Diversity, Journal Year: 2025, Volume and Issue: 17(3), P. 157 - 157

Published: Feb. 25, 2025

The factors driving plant species diversity in different forest types and layers are still insufficiently understood. Therefore, we investigated the limiting of nutrient water use efficiency three (arbor, shrub herb layers) two (plantation natural forest), as well their potential relationship with diversity. study area is located mid-latitude evergreen broad-leaved ecosystems southern Anhui province. nitrogen content soil (2.90 g kg−1) exceeded national average for (1.06 kg−1), whereas phosphorus (0.43 was below such (0.65 kg−1). arbor layer comparatively low, exerted a more substantial influence on it. In contrast, had most significant impact layers. conclusion, has little effect growth patterns this area, while there role regulating succession rates. There phenomenon excessive deposition loss ecosystem. Despite fact that indices (the Pielou Evenness Index, Gleason Richness Shannon–Wiener Diversity Index Simpson Dominance Index) forests were higher than plantation forests, disparity between them not (p > 0.05). This may be due to similar climate. findings research hold significance forecasting alterations diversity, functionality, influencing within forests.

Language: Английский

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Biochar mitigates nitrogen deposition-induced enhancement of soil N2O emissions in a subtropical forest

Biology and Fertility of Soils, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Language: Английский

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Plant use of water across soil depths regulates species dominance under nitrogen addition

Plant Diversity, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Global Availability of Plant DNA Barcodes as Genomic Resources to Support Basic and Policy‐Relevant Biodiversity Research

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

ABSTRACT Genetic technologies such as DNA barcoding make it easier and less expensive to monitor biodiversity its associated ecosystem services, particularly in hotspots where traditional assessments are challenging. Successful use of these data‐driven technologies, however, requires access appropriate reference data. We reviewed the >373,584 plant barcodes public repositories found that they cumulatively cover a remarkable quarter ~435,000 extant land species (Embryophyta). Nevertheless, coverage gaps tropical reflect well‐documented biases science – most specimens originated Global North. Currently, at least 17% families lack any barcode data whatsoever, affecting temperate regions alike. Investigators often emphasise importance marker choice need ensure protocols technically capable detecting identifying broad range taxa. Yet persistent geographic taxonomic datasets show rely upon risk undermining all downstream applications strategy, ranging from basic monitoring policy‐relevant objectives forensic authentication materials illegal trade. Future networks investigators could work strategically improve coverage, which will be essential global efforts conserve while advancing more fair equitable benefits arising genetic resources.

Language: Английский

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Evidence for the role of soil C/N ratio in shaping plant responses to root-knot nematode infection

Journal of Advanced Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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