Eutrophication: A new wine in an old bottle?

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 651, P. 1 - 11

Published: Sept. 13, 2018

Language: Английский

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Human Perturbation of the Global Phosphorus Cycle: Changes and Consequences

Environmental Science & Technology, Journal Year: 2018, Volume and Issue: 52(5), P. 2438 - 2450

Published: Feb. 5, 2018

The phosphorus (P) cycle is an important Earth system process. While natural P mobilization slow, humans have been altering by intensifying releases from lithosphere to ecosystems. Here, we examined magnitudes of which altered the cycles integrating estimates recent literatures, and furthermore illustrated consequences. Based on our synthesis, human alterations tripled global in land-water continuum increased accumulation soil with 6.9 ± 3.3 Tg-P yr–1. Around 30% atmospheric transfer caused activities, plays a significant role than previously thought. Pathways involving include phosphate extraction, fertilizers application, wastes generation, losses cropland. This study highlights importance sustainable supply as control future food security because regional scarcity, demand increase continuously intensive production. Besides, accelerated loads are responsible for enhanced eutrophication worldwide, resulting water quality impairment aquatic biodiversity losses. Moreover, enrichment can definitely stimulate cycling carbon nitrogen, implying great need incorporating models predicting response nitrogen changes.

Language: Английский

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Scientists’ Warning to Humanity: Rapid degradation of the world’s large lakes

Journal of Great Lakes Research, Journal Year: 2020, Volume and Issue: 46(4), P. 686 - 702

Published: May 25, 2020

Large lakes of the world are habitats for diverse species, including endemic taxa, and valuable resources that provide humanity with many ecosystem services. They also sentinels global local change, recent studies in limnology paleolimnology have demonstrated disturbing evidence their collective degradation terms depletion (water food), rapid warming loss ice, destruction ecosystems, accelerating pollution. particularly exposed to anthropogenic climatic stressors. The Second Warning Humanity provides a framework assess dangers now threatening world's large lake ecosystems evaluate pathways sustainable development more respectful ongoing provision Here we review current emerging threats world, iconic examples management failures successes, from which identify priorities approaches future conservation efforts. underscores extent resource degradation, is result cumulative perturbation through time by long-term human impacts combined other Decades resulted major challenges restoration legacy ecological economic costs generations. will require intense efforts warmer, increasingly populated achieve sustainable, high-quality waters. This an opportunity highlight value observatory network monitor report on environmental changes ecosystems.

Language: Английский

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Gypsum Amendment of Agricultural Fields Decreases Phosphorus Losses – Evidence on a Catchment Scale

Published: Jan. 1, 2024

Amending agricultural fields with gypsum has been proposed as a cost-effective measure to reduce P load coastal waters. To study its performance on large scale, we treated 1490 ha of clayey phosphogypsum (4 t ha−1) in southwest Finland and monitored the recipient river online sensors water sampling for preceding spring 5 years after amendment. Gypsum immediately decreased riverine fluxes, effect lasting at least particulate (PP), total suspended solids (TSS) dissolved organic C (DOC) 1–2 reactive (DRP). Compared an upstream control area, fluxes PP, TSS DOC by 15%, 25% 8.9%, respectively, 5-year average. Assuming change occurred only due gypsum, amended showed 35%, 59% 64%, lower losses than unamended ones. Although lessened time, some may be present years, because more half still remained soil. The different erodibility treatment areas increased uncertainty results, especially pre-gypsum period was short. In addition, spatial variation.

Language: Английский

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A Review of the Latest in Phosphorus Fertilizer Technology: Possibilities and Pragmatism

Journal of Environmental Quality, Journal Year: 2019, Volume and Issue: 48(5), P. 1300 - 1313

Published: Aug. 8, 2019

The development of highly concentrated phosphorus (P) fertilizers, such as triple superphosphate, by the Tennessee Valley Authority helped mark beginning a revolution in way we manage food crop nutrition. Since then, scientists, with help farmers, have made great advancements understanding P fate and transport across many environments but largely failed to produce new generation products and/or application techniques that are widely accepted vastly improve plant acquisition efficiency. Under certain conditions, important been made. For example, applying liquid formulations phosphates lieu dry granules some calcareous soils has dramatically reduced precipitation sparingly soluble calcium phosphate minerals, other attempts, co‐application humic substances, sorption layered double hydroxides, or use nanoparticles, not generated kind results necessary continue economically increasing yields without further environmental cost. New sources fertility will need be affordable produce, transport, furnish soil solution manner well synchronized demand. This paper provides review recent literature on cutting‐edge fertilizer technology. goal is this synthesis used starting point from which larger discussion responsible nutrient management increased efficiency research can built. Core Ideas Reaction constituents limits availability yield. A variety approaches being explored. Ideally, should More innovation along mechanistic field‐scale trials required.

Language: Английский

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Options for Improved Phosphorus Cycling and Use in Agriculture at the Field and Regional Scales

Journal of Environmental Quality, Journal Year: 2019, Volume and Issue: 48(5), P. 1247 - 1264

Published: Aug. 15, 2019

Soil phosphorus (P) cycling in agroecosystems is highly complex, with many chemical, physical, and biological processes affecting the availability of P to plants. Traditionally, fertilizer recommendations have been made using an insurance‐based approach, which has resulted accumulation intensively managed agricultural soils worldwide contributed widespread water quality issue eutrophication. To mitigate further environmental degradation because future supplies are threatened due finite phosphate rock resources associated geopolitical issues, there immediate need increase use efficiency (PUE) agroecosystems. Through cultivar selection improved cropping system design, contemporary research suggests that sufficient crop yields could be maintained at reduced soil test (STP) concentrations. In addition, more efficient field scale can achieved through agroecosystem management increases organic matter mineralization optimizes arbuscular mycorrhizal fungi (AMF) symbioses. This review paper provides a perspective on how agriculture potential utilize plant microbial traits improve PUE accordingly, maintain lower STP It also links tighten cycle regional scale, including discussion recovery recycling technologies, particular focus struvite as recycled fertilizer. Guidance directions for provided. Core Ideas There urgent Crop than recommended Both quantity influence availability. Further ability supply crops needed. Struvite fill important niche recycling.

Language: Английский

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Managing Diffuse Phosphorus at the Source versus at the Sink

Environmental Science & Technology, Journal Year: 2018, Volume and Issue: 52(21), P. 11995 - 12009

Published: Sept. 24, 2018

Judicious phosphorus (P) management is a global grand challenge and critical to achieving maintaining water quality objectives while food production. The of point sources has been successful in lowering P inputs aquatic environments, but more difficult reducing discharges associated with diffuse sources, such as nonpoint runoff from agriculture urban landscapes, well accumulated soils sediments. Strategies for effective diffuse-P are imperative. Many options currently available, the most cost-effective practical choice depends on local situation. This review describes how metrics quantity kg ha-1 yr-1 form can influence decision-making implementation strategies. Quantifying total available pool P, its form, system necessary inform decision-making. draws upon number " current practice" case studies that span agriculture, cities, sectors. These diverse examples around world highlight different approaches, delivered at source catchment watershed or sink. They underscore workable improvement wider sustainability. discussed this transferable other jurisdictions scale. We demonstrate typically highest concentrated source, particularly farm practically implementable are, therefore, reduce use, conserve mitigate loss source. Sequestering removing sinks involves increasing cost, sometimes choice. Recovery diffuse-P, expensive, offers opportunity circular economy.

Language: Английский

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Forms and subannual variability of nitrogen and phosphorus loading to global river networks over the 20th century

Global and Planetary Change, Journal Year: 2018, Volume and Issue: 163, P. 67 - 85

Published: Feb. 16, 2018

Language: Английский

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Respective roles of Fe-oxyhydroxide dissolution, pH changes and sediment inputs in dissolved phosphorus release from wetland soils under anoxic conditions

Geoderma, Journal Year: 2019, Volume and Issue: 338, P. 365 - 374

Published: Jan. 4, 2019

Language: Английский

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Tracking changes in nutrient delivery to western Lake Erie: Approaches to compensate for variability and trends in streamflow

Journal of Great Lakes Research, Journal Year: 2019, Volume and Issue: 45(1), P. 21 - 39

Published: Jan. 10, 2019

Tracking changes in stream nutrient inputs to Lake Erie over multidecadal time scales depends on the use of statistical methods that can remove influence year-to-year variability streamflow but also explicitly consider long-term trends streamflow. The introduced this paper include an extended version Weighted Regressions Time, Discharge, and Season (WRTDS) modeling considers nonstationary by incorporating information frequency distribution daily measured (discharge) time. Soluble reactive phosphorus (SRP) annual flow-normalized fluxes (loads) at five monitoring sites western drainage basin show increases 109 322% period 1995 2015. About one-third increase appears attributable increasing discharge trends, while remaining two-thirds be driven concentration versus relationships reflecting higher concentrations for any given during recent years. Trends total three nitrogen parameters (total nitrogen, nitrate-nitrite, Kjeldahl nitrogen) 10 analyzed were much less pronounced, commonly decreases concentration-discharge accompanied discharge, resulting little net change flux. monthly SRP dissolved particulate fractions nutrients, N:P flux ratios evaluated. described here provide tools more clearly discern effectiveness nutrient-control strategies serve as ongoing measures progress, or lack towards nutrient-reduction goals.

Language: Английский

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