scholarly journals Carbon, nitrogen and phosphorus stoichiometry of crustacean zooplankton in the Baltic Sea: implications for nutrient recycling

1999 ◽  
Vol 21 (12) ◽  
pp. 2309-2321 ◽  
Author(s):  
J. Walve
Keyword(s):  
Baltic Sea ◽  
Nutrient Recycling ◽  
Crustacean Zooplankton ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
The Baltic

scholarly journals Future socioeconomic conditions may have a larger impact than climate change on nutrient loads to the Baltic Sea

AMBIO ◽  
2019 ◽  
Vol 48 (11) ◽  
pp. 1325-1336 ◽  
Author(s):  
Alena Bartosova ◽  
René Capell ◽  
Jørgen E. Olesen ◽  
Mohamed Jabloun ◽  
Jens Christian Refsgaard ◽  
...  
Keyword(s):  
Climate Change ◽  
Baltic Sea ◽  
Dynamic Modelling ◽  
Climate Change Scenarios ◽  
Nutrient Loads ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
Socioeconomic Drivers ◽  
The Baltic ◽  
The Impact

Abstract The Baltic Sea is suffering from eutrophication caused by nutrient discharges from land to sea, and these loads might change in a changing climate. We show that the impact from climate change by mid-century is probably less than the direct impact of changing socioeconomic factors such as land use, agricultural practices, atmospheric deposition, and wastewater emissions. We compare results from dynamic modelling of nutrient loads to the Baltic Sea under projections of climate change and scenarios for shared socioeconomic pathways. Average nutrient loads are projected to increase by 8% and 14% for nitrogen and phosphorus, respectively, in response to climate change scenarios. In contrast, changes in the socioeconomic drivers can lead to a decrease of 13% and 6% or an increase of 11% and 9% in nitrogen and phosphorus loads, respectively, depending on the pathway. This indicates that policy decisions still play a major role in climate adaptation and in managing eutrophication in the Baltic Sea region.

scholarly journals Temporal Trends in Phosphorus Concentrations and Losses from Agricultural Monitoring Sites in Latvia

2021 ◽  
Vol 25 (1) ◽  
pp. 233-242
Author(s):  
Ieva Siksnane ◽  
Ainis Lagzdins
Keyword(s):  
Baltic Sea ◽  
Water Discharge ◽  
Temporal Trends ◽  
Agricultural Runoff ◽  
Trend Test ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
Study Sites ◽  
The Baltic ◽  
Statistical Trends

Abstract The Baltic Sea is the youngest sea on our planet, the environment of the sea is considered to be unique and fragile. It is affected by various human activities resulting in the impairment of water quality. Riverine nutrient (nitrogen and phosphorus) loads are among the major causes of eutrophication of the Baltic Sea. This study examines temporal trends in water discharge, total phosphorus (TP) and orthophosphate-phosphorus (PO4-P) concentrations and losses from three agricultural runoff monitoring sites in Latvia including Berze, Mellupite, and Vienziemite. The annual datasets of TP and PO4-P concentrations and losses were tested for statistical trends using a nonparametric test - the Mann-Kendall trend test. The timeframe of this study was from 1995 until 2018. The results show a large variety of annual mean concentrations and losses of TP and PO4-P in the study period. No statistically significant trend was detected for TP losses. Meanwhile, statistically significant downward trends were observed for TP concentrations in four out of six study sites and in two study sites for PO4-P concentrations.

scholarly journals Trends, insights and effects of the Urban Wastewater Treatment Directive (91/271/EEC) implementation in the light of the Polish coastal zone eutrophication

2021 ◽  
Vol 67 (2) ◽  
pp. 342-354
Author(s):  
Michał Preisner ◽  
Marzena Smol ◽  
Dominika Szołdrowska
Keyword(s):  
Wastewater Treatment ◽  
Baltic Sea ◽  
Algal Blooms ◽  
Municipal Wastewater ◽  
Nutrient Concentrations ◽  
Urban Wastewater ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
The Baltic ◽  
Urban Wastewater Treatment

AbstractThe intensification of the Baltic Sea eutrophication is associated with the increase of anthropogenic nutrients loads, mainly nitrogen and phosphorus introduced into surface waters from a diffuse, point and natural background sources. Despite the observed decreasing trends in nutrient concentrations in some parts of the Baltic Sea, eutrophication-related indicators continue to deteriorate. This accelerates harmful algal blooms and dissolved oxygen deficits resulting in severe ecosystem disturbance. The paper presents trends, insights and effects of the Urban Wastewater Treatment Directive 91/271/EEC implementation in Poland based on the nutrient riverine loads from Polish territory with particular attention given to the development of municipal wastewater treatment plants under the National Wastewater Treatment Programme 2003–2016. Environmental effects of wastewater infrastructure modernisation are investigated by using available data on the changing nutrient concentrations in the coastal water in 3 basins (Gdansk Basin, Bornholm Basin and Eastern Gotland Basin) belonging to the Polish Exclusive Economic Zone within the Baltic Sea. The results show that the decreasing trend regarding phosphorus loads reduction from municipal effluents was achieved while a stable trend with temporary increases was achieved in terms of nitrogen loads. Moreover, the investigation provides information about the potential bioavailability of discharged effluents before and after the Directive implementation by including total and inorganic forms of nitrogen and phosphorus in the analysis.

scholarly journals Seasonal changes of the concentrations of mineral forms of nitrogen and phosphorus in watercourses in the agricultural catchment area (Bay of Puck, Baltic Sea, Poland)

2018 ◽  
Vol 19 (3) ◽  
pp. 986-994 ◽  
Author(s):  
E. Wojciechowska ◽  
N. Nawrot ◽  
K. Matej-Łukowicz ◽  
M. Gajewska ◽  
H. Obarska-Pempkowiak
Keyword(s):  
Baltic Sea ◽  
Seasonal Changes ◽  
Arable Land ◽  
Phosphorus Compounds ◽  
Nutrient Concentrations ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
Sources Of Pollution ◽  
Biogenic Compounds ◽  
The Baltic

Abstract The Baltic Region countries are obliged to meet the stringent limits of N and P discharge set by HELCOM for 2021. Area sources of pollution, including agriculture, are considered the main contributors of biogenic compounds. The Bay of Puck as an inner part of the Baltic Sea is particularly sensitive to eutrophication caused by nutrient inflow from agricultural lands. Rivers and streams inflowing to the Bay of Puck transport nitrogen and phosphorus compounds washed out from fields. The article discusses concentrations of nitrogen and phosphorus compounds measured during annual research (VII.2017 – VI.2018) at three watercourses: Płutnica, Reda and Błądzikowski Stream inflowing to the Bay of Puck. The concentrations ranged from 0.01 to 0.13 mg/L N-NO2, from 0.39 to 7.55 mg/L N-NO3, from 0.03 to 0.58 mg/L N-NH4, from 0.44 to 9.51 mg/L TN, from 0.05 to 0.45 mg/L P-PO4 and from 0.03 to 1.89 mg/L TP. Seasonal changes of nutrient concentrations were observed, with maximum concentrations of nitrates in August and September after application of fertilizers to arable land.

Modeling pathways of riverine nitrogen and phosphorus in the Baltic Sea

2012 ◽  
Vol 117 (C9) ◽  
pp. n/a-n/a ◽  
Author(s):  
H. Radtke ◽  
T. Neumann ◽  
M. Voss ◽  
W. Fennel
Keyword(s):  
Baltic Sea ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
The Baltic

scholarly journals Key processes in the coupled carbon, nitrogen, and phosphorus cycling of the Baltic Sea

2017 ◽  
Vol 134 (3) ◽  
pp. 301-317 ◽  
Author(s):  
Erik Gustafsson ◽  
Oleg P. Savchuk ◽  
Bo G. Gustafsson ◽  
Bärbel Müller-Karulis
Keyword(s):  
Baltic Sea ◽  
Phosphorus Cycling ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
The Baltic

Efficiency of the coastal filter: Nitrogen and phosphorus removal in the Baltic Sea

2017 ◽  
Vol 62 (S1) ◽  
pp. S222-S238 ◽  
Author(s):  
Eero Asmala ◽  
Jacob Carstensen ◽  
Daniel J. Conley ◽  
Caroline P. Slomp ◽  
Johanna Stadmark ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Phosphorus Removal ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
The Baltic

scholarly journals Factors regulating the coastal nutrient filter in the Baltic Sea

AMBIO ◽  
2019 ◽  
Vol 49 (6) ◽  
pp. 1194-1210 ◽  
Author(s):  
Jacob Carstensen ◽  
Daniel J. Conley ◽  
Elin Almroth-Rosell ◽  
Eero Asmala ◽  
Erik Bonsdorff ◽  
...  
Keyword(s):  
Organic Matter ◽  
Baltic Sea ◽  
Nitrogen Removal ◽  
Regional Differences ◽  
Biogeochemical Processes ◽  
The Baltic Sea ◽  
Nitrogen And Phosphorus ◽  
Physico Chemical ◽  
The Stability ◽  
The Baltic

Abstract The coastal zone of the Baltic Sea is diverse with strong regional differences in the physico-chemical setting. This diversity is also reflected in the importance of different biogeochemical processes altering nutrient and organic matter fluxes on the passage from land to sea. This review investigates the most important processes for removal of nutrients and organic matter, and the factors that regulate the efficiency of the coastal filter. Nitrogen removal through denitrification is high in lagoons receiving large inputs of nitrate and organic matter. Phosphorus burial is high in archipelagos with substantial sedimentation, but the stability of different burial forms varies across the Baltic Sea. Organic matter processes are tightly linked to the nitrogen and phosphorus cycles. Moreover, these processes are strongly modulated depending on composition of vegetation and fauna. Managing coastal ecosystems to improve the effectiveness of the coastal filter can reduce eutrophication in the open Baltic Sea.

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