Climatic effects on water quality in areas with acid sulfate soils with commensurable consequences on the reproduction of burbot (Lota lota L.)

Abstract

Due to discharge from acid sulfate (a.s.) soils, watercourses and coastal areas in the Gulf of Bothnia are periodically heavily acidified with high concentrations of potentially toxic metals. Data on water quality from 2005 to 2014 in an embanked lake, an estuary of four rivers in western Finland, showed repeated events with acidic water (pH < 5.5) with high concentrations of Al. Size fractionation and species modeling of Al showed that a significant part of the Al occurred as highly toxic small-size fractions (dissolved < 1 kDa and colloidal 1 kDa—0.45 µm) as free ions and complexed to sulfate. The larval abundance of the burbot (Lota lota L.) was shown to be sensitive to acidity during the wintertime spawning migration and spawning. Bearing in mind the importance of estuaries of the northern Baltic Sea as spawning and nursery areas of fish, the reoccurring failure in the reproduction of fish may cause a more serious threat for the lake and adjacent coastal fish stocks than the spectacular, but less frequent, mass kills of adult fish. This demonstrates the close relationship between climate, hydrology, water geochemistry and the aquatic coastal ecosystem in areas affected by a.s. soils. As the current forecast of climate chance indicates warmer winters with more continuous runoff, the effects can become even more prominent. This study also shows that the annual larvae abundance of burbot may be used as a bioindicator and an instrument for the fisheries for obtaining more comprehensive knowledge of the ecological effects of acidic metal discharge from a.s. soils.

Contrasting microbial communities drive iron cycling across global biomes

“…The acid sulfate soils at the Risö adan experimental site in Finland are the result of a diagenesis process likely resulting from the rise in sea levels during the last 7500 years of the current Holocene era and subsequent rise of iron sul de rich sediments accumulated in the anoxic sea zone to raise up to 100 m above sea level 31 . Inspection of the soil pro les at the site 32 indicates the presence of three distinct types of sub-soil.…”

Relación entre aluminio y la enfermedad de Alzheimer: Revisión

“…Soil geochemistry not only affects plants and plant products through aluminum migration but also alters water quality. This contamination causes water quality to decrease to levels prejudicial to biota in waterways affected by the easy discharge of aluminum due to the high solubility of this contaminant in more acidic conditions such as those in acidic soil and rain (acid rain) (Hu et al, 2017;Toivonen et al, 2020). Therefore, the above-mentioned phenomena may be factors in the increased levels of aluminum in some plants, as is the case of tea plants (Camellia sinensis) which are produced in acid soils with a pH range of 3.5 -5.6 (De Silva et al, 2016;Hu et al, 2017).…”

Species of Aquatic Animals Associated With the Development of Haff Disease in Humans: A Literature Review

“…The adult coastal burbot (Lota lota L.) shows a cold stenothermal biology, meaning that they are only found in spawning areas in rivers and estuaries during the winter and reside in the sea during the rest of the year, where temperatures are cooler. stable and cooler (Toivonen et al, 2020). Its first appearance in the literature related to Haff disease is reported in 1924, in the first occurrence of the disease, on the shore of Lake Königsberger, also associated with the species Eel (Anguilla anguilla) and Pike (Esox lucius) (Buchholz, 2000).…”