Influence of algal blooms decay on arsenic dynamics at the sediment-water interface of a shallow lake

Chemosphere ◽  
2019 ◽  
Vol 219 ◽  
pp. 1014-1023 ◽  
Author(s):  
Liqing Zeng ◽  
Changzhou Yan ◽  
Jianhua Guo ◽  
Zhuo Zhen ◽  
Yuan Zhao ◽  
...  
Keyword(s):  
Shallow Lake ◽  
Algal Blooms ◽  
Water Interface

Anabaenopsis morphospecies (Cyanobacteria, Nostocales) from Los Patos shallow lake (Province of Buenos Aires, Argentina)

Phytotaxa ◽  
2016 ◽  
Vol 272 (3) ◽  
pp. 173 ◽  
Author(s):  
ANABELLA AGUILERA ◽  
JIŘĺ KOMÁREK ◽  
RICARDO O. ECHENIQUE
Keyword(s):  
Population Dynamics ◽  
Species Richness ◽  
Shallow Lake ◽  
Algal Blooms ◽  
Buenos Aires ◽  
Morphological Diversity ◽  
Abundant Species ◽  
American Continent ◽  
First Report ◽  
Almost All

The genus Anabaenopsis comprises about 20 morphospecies distributed in plankton of tropical, subtropical and temperate regions during warm periods. The morphological diversity and population dynamics of Anabaenopsis species from one artificial shallow lake from the Province of Buenos Aires, Argentina, was studied during summer 2005 and 2006; and from April 2012 to May 2014. The most common and abundant species were identified as A. elenkinii and A. cf. cunningtonii (first report in Argentina). Anabaenopsis circularis and A. milleri (first report in the American continent and Argentina) were less common, whereas A. nadsonii was rarely observed. Almost all species contributed to algal blooms during warm periods. However, some species were registered even under the lowest temperatures recorded (7.5 °C) and sustained biovolume also during winter (A. milleri, A. elenkinii and A. cf. cunningtonii). These results indicate that some species of the genus are capable of growing at temperatures much lower than 20°C. The species richness noted in this study suggests that there is likely much more diversity remaining on this genus to be reported in Argentina.

Phosphorus speciation, burial and regeneration in coastal lagoon sediments of the Gippsland Lakes (Victoria, Australia)

2007 ◽  
Vol 4 (5) ◽  
pp. 334 ◽  
Author(s):  
Phil Monbet ◽  
Ian D. McKelvie ◽  
Paul. J. Worsfold
Keyword(s):  
Sequential Extraction ◽  
Water Column ◽  
Coastal Lagoon ◽  
Algal Blooms ◽  
Solid Phase ◽  
Ecological Status ◽  
Fickian Diffusion ◽  
Water Interface ◽  
Dissolved Reactive Phosphorus ◽  
Reactive Phosphorus

Environmental context. Eutrophication can lead to the production of harmful algal blooms and is one of the world’s most serious water quality issues. Phosphorus is potentially the limiting macro-nutrient in fresh, estuarine and some marine waters. Consequently, it plays a crucial role in determining the ecological status of many aquatic ecosystems. Considerable effort has been invested in monitoring dissolved reactive phosphorus and total phosphorus in the water column, but less is known about the speciation of phosphorus, particularly in the sediment. This compartment is an important and dynamic reservoir of phosphorus and a potential long-term source of phosphorus release to the water column by the sediment–water interface. This paper investigates the solid-phase speciation and reorganisation of phosphorus within the sediments of a shallow lake system in south-east Australia (the Gippsland Lakes) which suffers from recurring harmful algae blooms. Various strategies are proposed to determine the minimum realistic timescale required to deplete the sediment of labile and reactive phosphorus species. Abstract. Solid-phase phosphorus pools in the sediments of two shallow lakes (Wellington and Victoria) in the Gippsland Lakes coastal lagoon system of south-east Australia are discussed. Cores (20-cm depth) were taken in summer and winter in both lakes and a sequential extraction scheme (SEDEX) was used to profile the exchangeable P (Pex), iron oxide/hydroxide bound P (PFe), authigenic P (Pauth), detrital P (Pdet) and organic P (Porg). Pore-water (Ppw) dissolved reactive phosphorus concentration profiles were also measured. The dominant forms of P were PFe (up to 53%) and Porg (35–55%), with the PFe fraction playing a key role in the short-term retention of P in the sediment. Benthic phosphorus fluxes at the sediment–water interface (μmol m–2 d–1) were determined from the sequential extraction data. The results were compared with flux measurements from the complementary approaches of benthic chamber experiments and Fickian diffusion calculations, to allow an insight into the nature and seasonal variations of the fluxes. The burial flux of phosphorus was also estimated from excess 210Pb profiles in the sediment of the lakes. All of these data were used to produce a phosphorus budget for the Gippsland Lakes which suggested that the sediment represents a substantial source of phosphorus within the lakes and thus clearly highlights the importance of the sedimentary compartment in shallow eutrophic ecosystems. Minimum realistic timescales for complete labile phosphorus depletion from the sediment (assuming no resupply from the sediment–water interface) were calculated and ranged from 8 to 22 years.

scholarly journals Effects of brownification and warming on algal blooms, metabolism and higher trophic levels in productive shallow lake mesocosms

2019 ◽  
Vol 678 ◽  
pp. 227-238 ◽  
Author(s):  
Heidrun Feuchtmayr ◽  
Thomas G. Pottinger ◽  
Alanna Moore ◽  
Mitzi M. De Ville ◽  
Laurie Caillouet ◽  
...  
Keyword(s):  
Shallow Lake ◽  
Algal Blooms ◽  
Trophic Levels

Phosphorus budgetary analysis of sediment–water interface in a short-term anoxic condition in shallow Lake Kasumigaura, Japan

Limnology ◽  
2016 ◽  
Vol 18 (1) ◽  
pp. 131-140 ◽  
Author(s):  
Koichi Kamiya ◽  
Takehiko Fukushima ◽  
Takao Ouchi ◽  
Morihiro Aizaki
Keyword(s):  
Shallow Lake ◽  
Anoxic Condition ◽  
Water Interface ◽  
Lake Kasumigaura ◽  
Short Term

scholarly journals Regulation of nitrogen dynamics at the sediment–water interface during HAB degradation and subsequent reoccurrence

RSC Advances ◽  
2020 ◽  
Vol 10 (23) ◽  
pp. 13480-13488
Author(s):  
Weiping Sima ◽  
Meijuan Hu ◽  
Qiang He ◽  
Yixi Qiu ◽  
Yitao Lv ◽  
...  
Keyword(s):  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Nutrient Dynamics ◽  
Nitrogen Dynamics ◽  
Water Interface

The effects of harmful algal blooms (HABs) on nutrient dynamics have been extensively studied; however, the response of nitrogen to continuous HAB degradation and subsequent reoccurrence is not well understood.

scholarly journals Sulfur Species, Bonding Environment, and Metal Mobilization in Mining-Impacted Lake Sediments: Column Experiments Replicating Seasonal Anoxia and Deposition of Algal Detritus

Minerals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 849
Author(s):  
Jeff Langman ◽  
Jaabir Ali ◽  
Andrew Child ◽  
Frank Wilhelm ◽  
James Moberly
Keyword(s):  
Lake Sediments ◽  
Algal Blooms ◽  
Water Interface ◽  
Primary Control ◽  
Metal Release ◽  
Coeur D'alene ◽  
N2 Atmosphere ◽  
Increasing Trend ◽  
Northern Idaho ◽  
Metal Bonds

The oxidation state of sulfur [S] is a primary control on mobility of metals in sediments impacted by legacy mining practices. Coeur d’Alene Lake of northern Idaho, USA, has been impacted by upstream legacy mining practices that deposited an estimated 75 Mt of metal(loid)- and S-rich sediments into the lake. Future lake conditions are expected to include algal blooms, which may alter S and metal remobilization during the seasonal euxinic environment. Cores of the lake sediments were exposed to anoxic and anoxic + algal detritus conditions for eight weeks at 4.5 °C through introduction of a N2 atmosphere and addition of algal detritus. At a location 2.5 cm below the sediment-water interface, anoxic conditions promoted a shift in S species to continually larger concentrations of reduced species and an associated shift in the bonding environment reflective of increased S–metal bonds. Anoxic + algal detritus conditions suppressed the increasing trend of reduced S species and induced greater release of Mn compared to the anoxic-only conditions but did not appear to enhance the release of As, Cd, or Fe. The addition of algal detritus to the sediment-water interface of these Fe- and S-rich sediments enhanced mobilization of Mn likely because of dissimilatory metal reduction where the anaerobic oxidation of the algal detritus stimulated Mn reduction. Results of the study indicate that future metal release from the lake sediments will be altered with the likely deposition of algal detritus, but the effect may not enhance the release of acutely toxic metals, such as As or Cd, or substantially impact Fe cycling in the sediments.

The Process of Algal Bloom Formation and the Effects of Wind - An Enclosure Experiment and In Situ Investigation in a Large Hyper-Eutrophic Shallow Lake in China

2012 ◽  
Vol 518-523 ◽  
pp. 4303-4314 ◽  
Author(s):  
Shu Hang Wang ◽  
Wen Wen Wang ◽  
Xia Jiang
Keyword(s):  
Wind Speed ◽  
Shallow Lake ◽  
Algal Blooms ◽  
Algal Bloom ◽  
Trophic Levels ◽  
Chaohu Lake ◽  
Enclosure Experiment ◽  
Bloom Formation ◽  
Eutrophic Shallow Lake

An enclosure experiment was conducted to evaluate the processes involved in algal bloom formation at different trophic levels in Chaohu Lake, which is a large hyper-eutrophic shallow lake in China. In situ investigations were conducted concurrently to quantitatively describe the effects of wind on the horizontal transference and vertical hybridization of algal blooms. The results revealed that certain nutrient trophic levels played a crucial role in the formation of algal blooms. Specifically, sediments were identified as an important source of nutrients and algal seeds that are necessary to maintain the trophic level and growth of algal blooms. In addition, the disturbance caused by wind accelerated the multiplication of algae, as well as their sedimentation and suspension at the water-sediment interface. Furthermore, when the wind speed was less than 3m•s-1, algal clusters drifted on the water surface at a speed that was exponentially related to the wind velocity with a coefficient of 0.9052. When the wind speed was greater than 3m•s-1, the algae mixed together vertically and then sank. The algal bloom distribution in the lake was dominated by leading wind directions. Moreover, the algal biomass of the surface lake water in leeward areas was 8.8 times greater than the biomass in the windward areas during the study period.

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