Biological production and eutrophication of Baltic Sea estuarine ecosystems: The Curonian and Vistula Lagoons

Aleksandrov, S. V.

doi:10.1016/j.marpolbul.2010.02.015

Cited by 53 publications

(18 citation statements)

References 5 publications

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“…The mean annual primary production level ·per year accordingly) was considerably higher than in the middle of the 1970s (300 gC/m 2 ·year) (Aleksandrov 2009(Aleksandrov , 2010. That can, probably, testify to the significant eutrophication of the Curonian Lagoon where the hyperbloom of Cyanobacteria has been observed over the last thirty years.…”

Section: Effects Of Harmful Algal Blooms and Climate Change On The Cumentioning

confidence: 93%

“…Based on the results of numerous hydrochemical and biological investigations, the Curonian Lagoon can be classified as a hypertrophic water body (Aleksandrov 2009(Aleksandrov , 2010.…”

Section: Effects Of Harmful Algal Blooms and Climate Change On The Cumentioning

confidence: 99%

“…For instance, in the coastal area, the chlorophyll concentration during the blooming period (July-September) could vary five-fold from 49-53 g/m 2 in , 2009, 2013to 196-219 g/m 2 in 2008, 2010, 2011). In the hydrological and hydrochemical conditions existing in most parts of the lagoon, water temperature appeared to be one of the key factors determining seasonal and long-term variability in phytoplankton abundance, and therefore, the level of the Curonian Lagoon eutrophication.…”

Section: Effects Of Harmful Algal Blooms and Climate Change On The Cumentioning

confidence: 99%

“…As A. flos-aquae contain microscopic vesicles that regulate their buoyancy, they are an important component of clusters on the water surface (Walsby 1994). Cyanobacteria spread over the lagoon from the end of June and the beginning of July till the end of October, accompanied by intensive bloom (Aleksandrov 2009(Aleksandrov , 2010Aleksandrov, Dmitrieva 2006;Gasiūnaitė et al 2008;Olenina, Olenin 2002). During the bloom period, the spatial-temporal concentration of dissolved oxygen in the lagoon greatly varies, resulting in anoxic conditions at high temperatures and low wind speeds (Gasiūnaitė et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of dynamics of sediments disposed in the marine coastal zone of the south-eastern Baltic

Sokolov¹,

Chubarenko²

2018

Baltica

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Abstract. The Curonian Lagoon is the largest coastal lagoon of the Baltic Sea. The Curonian Lagoon is a hypereutrophic water body beset with two major problems: eutrophication and algal blooms. Biological and chemical data for the study of water eutrophication and algal blooms were collected from 4 sampling points in the coastal and off-shore areas at distances of 1 km and 4-5 km from the Curonian Spit during the period from April 2007 to November 2016. The ratio of mineral nitrogen/phosphorus forms created conditions for regular Cyanobacteria hyperblooms during the summer and early autumn. Such blooms are followed by an increase in the concentration of ammonia nitrogen, pH and BOD 5, their values exceeding the threshold limits for fishery water reservoirs. A distinct peak of chlorophyll a concentration was observed in the period of freshwater Cyanobacteria hyperbloom from July to September or October. During the "hyperbloom" of Cyanobacteria, their accumulation and decomposition, which was caused by a constant wind direction, also led to the local oxygen deficit and fish mortality in the coastal zone. Chlorophyll a concentration was always at the level of intensive bloom (10-100 μg/l) and over the period of 6 years (2008, 2010, 2011, 2012, 2014, 2016) it reached the hyperbloom state (above 100 μg/l). Water temperature appeared to be one of the key factors determining seasonal and long-term variability in phytoplankton abundance and, therefore, the level of eutrophication in the Curonian Lagoon.

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Section: Effects Of Harmful Algal Blooms and Climate Change On The Cumentioning

confidence: 93%

“…Based on the results of numerous hydrochemical and biological investigations, the Curonian Lagoon can be classified as a hypertrophic water body (Aleksandrov 2009(Aleksandrov , 2010.…”

Section: Effects Of Harmful Algal Blooms and Climate Change On The Cumentioning

confidence: 99%

Section: Effects Of Harmful Algal Blooms and Climate Change On The Cumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical simulation of dynamics of sediments disposed in the marine coastal zone of the south-eastern Baltic

Sokolov¹,

Chubarenko²

2018

Baltica

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“…The ecosystem is greatly dependent on the Nemunas river runoff (98% of the total freshwater discharge), draining substantial amount of nutrients from the basin (Zaromskis 1996). Ongoing eutrophication is one of the most important problems in the lagoon, affecting all ecosystem components including bottom habitats (Olenina and Olenin 2002, Olenin and Daunys 2004, Aleksandrov 2010). The lagoon is oligohaline in its narrow northern part (with irregular rapid salinity fluctuations in the range of 0.5 to 5-6 PSU) and limnic in its central and southern parts (with a relatively closed water circulation and lower current velocities.…”

Section: Study Areamentioning

confidence: 99%

Invasive ecosystem engineers and biotic indices: Giving a wrong impression of water quality improvement?

Zaiko

Daunys

2015

Ecological Indicators

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Abstract:Benthic component of an ecosystem is considered in ecological status assessment of the key European Directives. Most of the metrics proposed for the benthic quality assessment are biodiversity based. Their robustness and applicability are widely discussed in many recent studies. However an impact of invasive alien species on biotic indices and environmental quality assessments has been largely overlooked by researchers so far. In the current study we assessed Benthic Quality Index (BQI) in a coastal ecosystem, highly affected by the invasive zebra mussel Dreissena polymorpha. Zebra mussel is able of modifying benthic habitats and enhancing local biodiversity. In the analyzed ecosystem it affected benthic species richness, abundance and community structure. As a result the calculated BQI values were significantly higher in the presence of zebra mussel with evident outliers in samples with particularly high zebra mussel abundances. Therefore we found that BQI determined in our study was artificially elevated providing false signal of the ecological status improvement. Based on the results presented, we suggested data correction framework that has been tested on the current dataset and proved to be effective minimizing zebra mussel impact on BQI assessment. Our experience could be applied for other coastal ecosystems invaded by the zebra mussel or any other aquatic invasive species with resembling biological traits and bioinvasion impacts. Highlights: We test the effect of an invasive alien species on ecological quality assessment  We calculate Benthic Quality Index for the coastal lagoon affected by zebra mussel  Zebra mussel may modify benthic habitats enhancing local biodiversity  This might bias BQI by showing false improvement of ecological status  We suggest a framework how the this bias could be minimized

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

Asmala

Carstensen

Conley

et al. 2017

Limnology & Oceanography

118

127

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An important function of coastal ecosystems is the reduction of the nutrient flux from land to the open sea, the coastal filter. In this study, we focused on the two most important coastal biogeochemical processes that remove nitrogen and phosphorus permanently: denitrification and phosphorus burial. We compiled removal rates from coastal systems around the Baltic Sea and analyzed their spatial variation and regulating environmental factors. These analyses were used to scale up denitrification and phosphorus burial rates for the entire Baltic Sea coastal zone. Denitrification rates ranged from non‐detectable to 12 mmol N m−2 d−1, and correlated positively with both bottom water nitrate concentration and sediment organic carbon content. The rates exhibited a strong decreasing gradient from land to the open coast, which was likely driven by the availability of nitrate and labile organic carbon, but a high proportion of non‐cohesive sediments in the coastal zone decreased the denitrification efficiency relative to the open sea. Phosphorus burial rates varied from 0.21 g P m−2 yr−1 in open coastal systems to 2.28 g P m−2 yr−1 in estuaries. Our analysis suggests that archipelagos are important phosphorus traps and account for 45% of the coastal P removal, while covering only 17% of the coastal areas. High burial rates could partly be sustained by phosphorus import from the open Baltic Sea. We estimate that the coastal filter in the Baltic Sea removes 16% of nitrogen and 53% of phosphorus inputs from land.

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Biological production and eutrophication of Baltic Sea estuarine ecosystems: The Curonian and Vistula Lagoons

Cited by 53 publications

References 5 publications

Numerical simulation of dynamics of sediments disposed in the marine coastal zone of the south-eastern Baltic

Numerical simulation of dynamics of sediments disposed in the marine coastal zone of the south-eastern Baltic

Invasive ecosystem engineers and biotic indices: Giving a wrong impression of water quality improvement?

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

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