Ecological status assessment of clay rivers with naturally enhanced water phosphorus concentrations DOI Creative Commons
Susanne C. Schneider, Eva Skarbøvik

Environmental Advances, Journal Year: 2022, Volume and Issue: 9, P. 100279 - 100279

Published: Aug. 7, 2022

The species composition of benthic algae changes as water phosphorus concentrations increase, and these can be used for ecological status assessment according to the Water Framework Directive. Natural background in rivers streams that are unaffected by anthropogenic impacts usually low. Running waters draining catchments with deposits marine clay, however, may have enhanced concentrations, because clay is naturally rich apatite. Almost all areas been cultivated centuries, fertilization has increased soil levels. It has, therefore, difficult disentangle natural from anthropogenically areas. We compared Periphyton Index Trophic Status PIT, between non-clay, impacted unimpacted Norway. found PIT index were higher than non-clay rivers, indicating indeed without clay. In addition, phosphate-P contributed 18–23% total but 33–37% affected agriculture. This indicates less bioavailable rivers. significantly catchment cover. Based on findings, we derived new class boundaries Clay suggested assessed only two classes, i.e., "good or better" "moderate worse", respectively. good/moderate boundary was shown increase increasing

Language: Английский

Land‐use dominates climate controls on nitrogen and phosphorus export from managed and natural Nordic headwater catchments DOI Creative Commons
Heleen A. de Wit, Ahti Lepistö, Hannu Marttila

et al.

Hydrological Processes, Journal Year: 2020, Volume and Issue: 34(25), P. 4831 - 4850

Published: Oct. 11, 2020

Abstract Agricultural, forestry‐impacted and natural catchments are all vectors of nutrient loading in the Nordic countries. Here, we present concentrations fluxes total nitrogen (totN) phosphorus (totP) from 69 headwater (Denmark: 12, Finland:18, Norway:17, Sweden:22) between 2000 2018. Catchments span range climatic environmental conditions include sites impacted by agricultural forest management. Concentrations totN totP were highest catchments, intermediate lowest positively related %agricultural land cover summer temperature. Summer temperature may be a proxy for terrestrial productivity, while might catchment inputs. A regional trend analysis showed significant declines N export across (−15 μg L −1 year ) (−0.4 NO 3 ‐N but individual displayed few long‐term trends (totN: 22%, totP: 25%) or 6%, 9%). Forestry‐impacted had decline (−0.1 P ). small increase (+0.4 kg km −2 was found, countries contrasting patterns. Trends annual could not explained straightforward way changes runoff climate. Explanations national mitigation measures agriculture international policy to reduced air pollution and, possibly, large‐scale increases growth. Mitigation reduce appears more challenging than nitrogen. If green shift entails intensification production, new challenges protection water quality will emerge possible exacerbated climate change. Further should seasonal trends, aquatic species focus on

Language: Английский

Citations

26
Nitrogen and phosphorus losses in Nordic and Baltic agricultural monitoring catchments – Spatial and temporal variations in relation to natural conditions and mitigation programmes DOI Creative Commons
Katarina Kyllmar, Marianne Bechmann, Gitte Blicher‐Mathiesen

et al.

CATENA, Journal Year: 2023, Volume and Issue: 230, P. 107205 - 107205

Published: June 10, 2023

Nitrogen (N) and phosphorus (P) losses via agricultural drainage water have negative impacts on receiving bodies large-scale programmes to reduce nutrient been established in the Nordic Baltic countries, together with catchment monitoring programmes. This study evaluated time series (9–40 years) of data from 34 selected Nordic-Baltic catchments for spatial temporal variations area-specific discharge (mm) concentrations transport total nitrogen (TN) (TP). Water varied 125 mm (Denmark) > 1000 (Norway). Catchments low TN (≤3 mg L-1) were dominated by clay or grass leys undrained reduction nitrate (NO3) shallow groundwater. high (≥10 had loams cereal crops. TP highest (≥0.45 erosive soils, relatively crops, lowest (≤0.07 permeable soils. Generalised additive mixed model (GAMM) analysis flow-weighted patterns revealed decreases seven increases eight, while four periods opposing trends. decreased Denmark Sweden 1990–2010, following introduction mitigation eight increased six, one showed Decreases coincided improved P balance sand loam. To further N losses, a tailored set measures is needed each combination soil, climate, geohydrology production. Intensive small can reveal how relate natural conditions changes

Language: Английский

Citations

6
Nordic hydrological frontier in the 21st century DOI Creative Commons
Hannu Marttila, Hjalmar Laudon, Lena M. Tallaksen

et al.

Hydrology Research, Journal Year: 2022, Volume and Issue: 53(5), P. 700 - 715

Published: April 15, 2022

Abstract The 21st century has brought new challenges and opportunities also increased demands on the Nordic hydrological community. Our science focus approaches need rethinking adaptation to changing requirements of society in response climate change human interventions, search more comprehensive cross-disciplinary solutions. This commentary highlights possibilities suggests vital steps forward for scientific discipline within research. By providing a common direction, we hope increase awareness, accelerate progress community, emphasize importance knowledge serving other fields at large. We that our vision identify will raise awareness assist long-term development frontier century.

Language: Английский

Citations

7
Italian reference rivers under the Water Framework Directive umbrella: do natural factors actually depict the observed nutrient conditions? DOI Creative Commons
Stefania Erba, Andrea Buffagni,

Marcello Cazzola

et al.

Environmental Sciences Europe, Journal Year: 2022, Volume and Issue: 34(1)

Published: July 22, 2022

Abstract Background Despite the efforts made in last century to counteract nutrient enrichment from diffuse and point-sources, excess of nitrogen phosphorous is among main causes degradation European rivers. In this context, determining natural background concentrations nutrients rivers crucial for a correct definition their ecological status. most anthropized regions, difficult task. This study provides nation-wide assessment concentration variability between Italian river reference sites. Results We applied Affinity Propagation technique identify groups sites classified as based on measured oxygen water saturation. The role anthropogenic factors differences was explored. Nitrate varied 0.01 mg N l −1 more than 5 . Ammonia total 0.001 0.12 Observed levels, although line with those identified other countries, largely exceed ranges reported basins. Atmospheric deposition inorganic artificial and/or high-impact agricultural land use are major concentration. Factors like, e.g. catchment size, precipitation amount altitude do not play relevant explaining Conclusions especially focused (i) failure selection appropriate Italy; (ii) potential setting higher NO 3 -N thresholds classification status specific areas, (iii) prospective regionalization approach, which human effects accepted low degree site or when peculiar geographical areas.

Language: Английский

Citations

7
Catchment effects of a future Nordic bioeconomy: From land use to water resources DOI Creative Commons
Eva Skarbøvik, Phil Jordan, Ahti Lepistö

et al.

AMBIO, Journal Year: 2020, Volume and Issue: 49(11), P. 1697 - 1709

Published: Sept. 14, 2020

Abstract In the future, world is expected to rely increasingly on renewable biomass resources for food, fodder, fibre and fuel. The sustainability of this transition bioeconomy our water systems depends a large extent how we manage land resources. Changes in use together with climate change will affect quantity quality, which again have implications ecosystem services provided by These are main topics Ambio special issue “Environmental effects green bio-economy”. This paper offers summary eleven papers included and, at same time, outlines an approach quantify mitigate impacts their services, indications useful tools knowledge needs.

Language: Английский

Citations

10
Phosphorus reference conditions in lowland streams: Survey in old forests and anaerobic sediment release DOI
Florian Lauryssen,

Jari Struyve,

Philippe Crombé

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 864, P. 160889 - 160889

Published: Dec. 16, 2022

Language: Английский

Citations

3
Widespread and persistent oligotrophication of northern rivers DOI Creative Commons
Martyn N. Futter,

Jenny M. Nilsson,

Sara Camiolo

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: March 5, 2024

Abstract Phosphorus (P) is often a limiting nutrient in freshwaters1 and oligotrophication (declining concentrations), associated with reductions anthropogenic loading, has occurred many locations2,3,4,5. Here, we report on persistent widespread of northern rivers (56o-66o N) that apparently unrelated to declining loading. Over the past forty years, P concentrations draining minimally disturbed subarctic, boreal nemoboreal Swedish catchments have declined by close 50%, more rapid declines already poor locations. Trends are negatively related increasing air temperature, pH alkalinity calcium organic carbon runoff. were strongest shallow, soils lying above highest postglacial coastline. Today, most study below expected background (reference) levels, suggesting entering new water quality regime. These ongoing likely further increase highlight need for surface management paradigm addressing consequences scarcity instead focusing solely actions targeting reductions.

Language: Английский

Citations

0
Widespread and persistent oligotrophication of northern rivers DOI Creative Commons

Jenny M. Nilsson,

Sara Camiolo,

Brian Huser

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 955, P. 177261 - 177261

Published: Nov. 1, 2024

Phosphorus (P) is often a limiting nutrient in freshwaters and most management actions aim to reduce eutrophication associated with excess anthropogenic P inputs. Here, we report on the opposite problem, persistent widespread oligotrophication (i.e., declining concentrations) northern rivers (56

Language: Английский

Citations

0
Land-use and agriculture in Denmark around year 1900 and the quest for EU Water Framework Directive reference conditions in coastal waters DOI Creative Commons
Bent T. Christensen,

B. F. Pedersen,

Jørgen E. Olesen

et al.

AMBIO, Journal Year: 2021, Volume and Issue: 50(10), P. 1882 - 1893

Published: March 18, 2021

Abstract The EU Water Framework Directive (WFD) aims to protect the ecological status of coastal waters. To establish acceptable boundaries between good and moderate status, WFD calls for reference conditions practically undisturbed by human impact. For Denmark, nitrogen (N) concentrations present around year 1900 have been suggested represent conditions. As N load waters relates closely runoff from land, any reduction in links agricultural activity. We challenge current use historical balances initiate an alternative approach based on parish-level land-use statistics collected 1896/1900 root zone percolates experiments with 1900-relevant management. This may be more widely applicable landscapes detailed historic information Using this approach, we find average concentration that is close agriculture. Thus, considering Danish unaffected activity remains futile as 75% land area was subject a substantial potential loss environment. It appears unlikely state serve condition.

Language: Английский

Citations

3
Ecological status assessment of clay rivers with naturally enhanced water phosphorus concentrations DOI Creative Commons
Susanne C. Schneider, Eva Skarbøvik

Environmental Advances, Journal Year: 2022, Volume and Issue: 9, P. 100279 - 100279

Published: Aug. 7, 2022

The species composition of benthic algae changes as water phosphorus concentrations increase, and these can be used for ecological status assessment according to the Water Framework Directive. Natural background in rivers streams that are unaffected by anthropogenic impacts usually low. Running waters draining catchments with deposits marine clay, however, may have enhanced concentrations, because clay is naturally rich apatite. Almost all areas been cultivated centuries, fertilization has increased soil levels. It has, therefore, difficult disentangle natural from anthropogenically areas. We compared Periphyton Index Trophic Status PIT, between non-clay, impacted unimpacted Norway. found PIT index were higher than non-clay rivers, indicating indeed without clay. In addition, phosphate-P contributed 18–23% total but 33–37% affected agriculture. This indicates less bioavailable rivers. significantly catchment cover. Based on findings, we derived new class boundaries Clay suggested assessed only two classes, i.e., "good or better" "moderate worse", respectively. good/moderate boundary was shown increase increasing

Language: Английский

Citations

1