Recent advancement in water quality indicators for eutrophication in global freshwater lakes

Environmental Research Letters, Journal Year: 2023, Volume and Issue: 18(6), P. 063004 - 063004

Published: April 26, 2023

Abstract Eutrophication is a major global concern in lakes, caused by excessive nutrient loadings (nitrogen and phosphorus) from human activities likely exacerbated climate change. Present use of indicators to monitor assess lake eutrophication restricted water quality constituents (e.g. total phosphorus, nitrogen) does not necessarily represent environmental changes the anthropogenic influences within lake’s drainage basin. Nutrients interact multiple ways with climate, basin conditions socio-economic development, point-source, diffuse source pollutants), systems. It therefore essential account for complex feedback mechanisms non-linear interactions that exist between nutrients ecosystems assessments. However, lack set holistic understanding challenges such assessments, addition limited monitoring data available. In this review, we synthesize main freshwater basins only include but also sources, biogeochemical pathways responses emissions. We develop new causal network (i.e. links indicators) using DPSIR (drivers-pressure-state-impact-response) framework highlights interrelationships among provides perspective dynamics basins. further review 30 key drivers pressures seven cross-cutting themes: (i) hydro-climatology, (ii) socio-economy, (iii) land use, (iv) characteristics, (v) crop farming livestock, (vi) hydrology management, (vii) fishing aquaculture. This study indicates need more comprehensive systems, guide expansion networks, support integrated assessments manage eutrophication. Finally, proposed can be used managers decision-makers realistic targets sustainable management achieve clean all, line Sustainable Development Goal 6.

Language: Английский

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Long-term soil warming decreases microbial phosphorus utilization by increasing abiotic phosphorus sorption and phosphorus losses

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 16, 2023

Abstract Phosphorus (P) is an essential and often limiting element that could play a crucial role in terrestrial ecosystem responses to climate warming. However, it has yet remained unclear how different P cycling processes are affected by Here we investigate the response of soil pools mountain forest after 14 years warming (+4 °C). Long-term decreased total pools, likely due higher outputs from soils increasing net plant uptake downward transportation colloidal particulate P. Warming increased sorption strength more recalcitrant fractions (absorbed iron oxyhydroxides clays), thereby further reducing bioavailable solution. As response, microbes enhanced production acid phosphatase, though this was not sufficient avoid decreases microbial biomass (and biotic phosphate immobilization). This study therefore highlights long-term triggers changes abiotic processes, which can potentially aggravate constraints trees negatively affect C sequestration potential these forests.

Language: Английский

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Dynamic carbon-nitrogen coupling under global change

Science China Life Sciences, Journal Year: 2023, Volume and Issue: 66(4), P. 771 - 782

Published: Jan. 18, 2023

Language: Английский

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Impact of aridity rise and arid lands expansion on carbon‐storing capacity, biodiversity loss, and ecosystem services

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(4)

Published: April 1, 2024

Abstract Drylands, comprising semi‐arid, arid, and hyperarid regions, cover approximately 41% of the Earth's land surface have expanded considerably in recent decades. Even under more optimistic scenarios, such as limiting global temperature rise to 1.5°C by 2100, semi‐arid lands may increase up 38%. This study provides an overview state‐of‐the‐art regarding changing aridity arid with a specific focus on its effects accumulation availability carbon (C), nitrogen (N), phosphorus (P) plant–soil systems. Additionally, we summarized impacts rising biodiversity, service provisioning, feedback climate change across scales. The expansion ecosystems is linked decline C nutrient stocks, plant community biomass diversity, thereby diminishing capacity for recovery maintaining adequate water‐use efficiency plants microbes. Prolonged drought led −3.3% reduction soil organic (SOC) content (based 148 drought‐manipulation studies), −8.7% decrease litter input, −13.0% absolute decomposition, −5.7% decomposition rate. Moreover, substantial positive loop warming exists, primarily due increased albedo. loss critical ecosystem services, including food production water resources, poses severe challenge inhabitants these regions. Increased reduces SOC, nutrient, content. Aridity intensification exacerbate socio‐economic disparities between economically rich least developed countries, significant opportunities improvement through investments infrastructure technology. By half world's landmass become dryland, characterized conditions marked limited C, N, P scarcity, native species biodiversity. These pose formidable challenges essential impacting human well‐being raising complex regional socio‐political challenges.

Language: Английский

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Phosphorus addition decreases microbial residual contribution to soil organic carbon pool in a tropical coastal forest

Global Change Biology, Journal Year: 2020, Volume and Issue: 27(2), P. 454 - 466

Published: Oct. 17, 2020

Abstract The soil nitrogen (N) and phosphorus (P) availability often constrains carbon (C) pool, elevated N deposition could further intensify P limitation, which may affect C cycling in these N‐rich P‐poor ecosystems. Soil microbial residues not only organic (SOC) pool but also impact SOC stability through aggregation. However, how nutrient aggregate fractions the residue contribution to is still well understood. We took advantage of a 10‐year field fertilization experiment investigate effects additions, fractions, their interactions on concentrations accumulation tropical coastal forest. found that continuous addition greatly decreased SOC, whereas had no significant effect. P‐stimulated decreases were presumably due enhanced recycling via increased activity residue‐decomposing enzymes. interactive between fraction significant, suggesting weak role physical protection by aggregates mediating responses altered availability. Our data suggest mechanisms driving might be different, P‐induced decrease unfavorable for forests. Such information critical understanding forests global cycle.

Language: Английский

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Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral‐bound soil phosphorus in grasslands

Ecology, Journal Year: 2021, Volume and Issue: 103(3)

Published: Dec. 19, 2021

Phosphorus (P) limitation is expected to increase due nitrogen (N)-induced terrestrial eutrophication, although most soils contain large P pools immobilized in minerals (Pi ) and organic matter (Po ). Here we assessed whether transformations of these could plant available alleviating under enhanced N availability. The mechanisms underlying possible were explored by combining results from a 10-year field addition experiment 3700-km transect covering wide ranges soil pH, N, aridity, leaching, weathering that affect status grasslands. Nitrogen promoted the dissolution immobile Pi (mainly Ca-bound recalcitrant P) more forms (including Al- Fe-bound fractions Olsen decreasing pH 7.6 4.7, but did not Po . Soil total declined 10% 385 ± 6.8 346 9.5 mg kg-1 , whereas increased 546% 3.5 0.3 22.6 2.4 after addition, associated with an mobilization, uptake, leaching. Similar experiment, drop 7.5 5.6 concentration along grassland ratio between relatively mobile Our provide new mechanistic understanding important role mobilization maintaining supply accelerating biogeochemical cycles anthropogenic enrichment. This process temporarily buffers ecosystem or even causes will extensively deplete long run.

Language: Английский

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Phosphorus Supply Increases Nitrogen Transformation Rates and Retention in Soil: A Global Meta‐Analysis

Earth s Future, Journal Year: 2022, Volume and Issue: 10(3)

Published: March 1, 2022

Abstract Interactions between nitrogen (N) and phosphorus (P) are important for plant growth ecosystem carbon (C) sequestration. While effects of N supply on P dynamics have been much studied, less is known about the opposite (P‐effect N). We conducted a meta‐analysis by compiling total 1,734 individual experimental observations from 116 peer‐reviewed publications to assess P‐addition soil dynamics. Globally, additions increased (TN) pool, potentially as result enhanced microbial immobilization reduced losses, with stronger effect detected under longer duration addition (≥5 yr). A coupled increase in organic C TN signifies fundamental role exogenous enhancing Phosphorus accelerated some cycling processes including gross mineralization, nitrification, denitrification, sizes varying among types increasing rates. Our results indicate affecting pools processes, highlight efficacy sequestering mitigating global emission.

Language: Английский

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Moderate salinity improves the availability of soil P by regulating P‐cycling microbial communities in coastal wetlands

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(1), P. 276 - 288

Published: Oct. 1, 2022

Accelerated sea-level rise is expected to cause the salinization of freshwater wetlands, but responses salinity availability soil phosphorus (P) and microbial genes involved in cycling P remain unexplored. We conducted a field experiment investigate effects on by communities their regulatory roles coastal brackish wetlands. Salinity was positively correlated with availability, higher concentrations labile lower moderately wetland. The diversity richness were wetland than substantially altered composition P-cycling community, which those separated from Metagenomic sequence analysis indicated that functional solubilization inorganic subsequent transport regulation more abundant soils. relative abundances most target differed between P-solubilization (gcd ppa) -mineralization (phoD, phy, ugpQ) P-transport (pstB, ugpA, ugpB, ugpE, pit) A significant positive correlation concentration suggested may, at least part, improve regulating community. Our results suggest community abundance respond moderate increases promoting mineralization P. Changes microbially mediated may represent strategies adapt levels, turn control function nutrient balance.

Language: Английский

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Phosphorus additions imbalance terrestrial ecosystem C:N:P stoichiometry

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(24), P. 7353 - 7365

Published: Sept. 3, 2022

Abstract Carbon (C):nitrogen (N):phosphorus (P) stoichiometry in plants, soils, and microbial biomass influences productivity nutrient cycling terrestrial ecosystems. Anthropogenic inputs of P to ecosystems are increasing; however, our understanding the impacts addition on ecosystem C:N:P ratios remains elusive. By conducting a meta‐analysis with 1413 paired observations from 121 publications, we showed that significantly decreased plant, soil, N:P C:P ratios, but had negligible effects C:N ratios. The reductions became more evident as application rates experimental duration increased. did not vary types or climates. Moreover, responses soil were associated pH fungi:bacteria Additionally, additions increased net primary productivity, biomass, respiration, N mineralization, nitrification, ammonium nitrate contents. Decreases plant both negatively correlated positively contents; contents, contents all declining Our findings highlight could imbalance potentially impact functions.

Language: Английский

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Meta-analysis of the impacts of phosphorus addition on soil microbes

Agriculture Ecosystems & Environment, Journal Year: 2022, Volume and Issue: 340, P. 108180 - 108180

Published: Sept. 18, 2022

Language: Английский

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