Cargando…
Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review
This review is focused on the biogeochemistry of arsenic in freshwaters and, especially, on the key role that benthic microalgae and prokaryotic communities from biofilms play together in through speciation, distribution, and cycling. These microorganisms incorporate the dominant iAs (inorganic arse...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7177459/ https://www.ncbi.nlm.nih.gov/pubmed/32235625 http://dx.doi.org/10.3390/ijerph17072331 |
_version_ | 1783525225136128000 |
---|---|
author | Barral-Fraga, Laura Barral, María Teresa MacNeill, Keeley L. Martiñá-Prieto, Diego Morin, Soizic Rodríguez-Castro, María Carolina Tuulaikhuu, Baigal-Amar Guasch, Helena |
author_facet | Barral-Fraga, Laura Barral, María Teresa MacNeill, Keeley L. Martiñá-Prieto, Diego Morin, Soizic Rodríguez-Castro, María Carolina Tuulaikhuu, Baigal-Amar Guasch, Helena |
author_sort | Barral-Fraga, Laura |
collection | PubMed |
description | This review is focused on the biogeochemistry of arsenic in freshwaters and, especially, on the key role that benthic microalgae and prokaryotic communities from biofilms play together in through speciation, distribution, and cycling. These microorganisms incorporate the dominant iAs (inorganic arsenic) form and may transform it to other arsenic forms through metabolic or detoxifying processes. These transformations have a big impact on the environmental behavior of arsenic because different chemical forms exhibit differences in mobility and toxicity. Moreover, exposure to toxicants may alter the physiology and structure of biofilms, leading to changes in ecosystem function and trophic relations. In this review we also explain how microorganisms (i.e., biofilms) can influence the effects of arsenic exposure on other key constituents of aquatic ecosystems such as fish. At the end, we present two real cases of fluvial systems with different origins of arsenic exposure (natural vs. anthropogenic) that have improved our comprehension of arsenic biogeochemistry and toxicity in freshwaters, the Pampean streams (Argentina) and the Anllóns River (Galicia, Spain). We finish with a briefly discussion of what we consider as future research needs on this topic. This work especially contributes to the general understanding of biofilms influencing arsenic biogeochemistry and highlights the strong impact of nutrient availability on arsenic toxicity for freshwater (micro) organisms. |
format | Online Article Text |
id | pubmed-7177459 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-71774592020-04-28 Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review Barral-Fraga, Laura Barral, María Teresa MacNeill, Keeley L. Martiñá-Prieto, Diego Morin, Soizic Rodríguez-Castro, María Carolina Tuulaikhuu, Baigal-Amar Guasch, Helena Int J Environ Res Public Health Review This review is focused on the biogeochemistry of arsenic in freshwaters and, especially, on the key role that benthic microalgae and prokaryotic communities from biofilms play together in through speciation, distribution, and cycling. These microorganisms incorporate the dominant iAs (inorganic arsenic) form and may transform it to other arsenic forms through metabolic or detoxifying processes. These transformations have a big impact on the environmental behavior of arsenic because different chemical forms exhibit differences in mobility and toxicity. Moreover, exposure to toxicants may alter the physiology and structure of biofilms, leading to changes in ecosystem function and trophic relations. In this review we also explain how microorganisms (i.e., biofilms) can influence the effects of arsenic exposure on other key constituents of aquatic ecosystems such as fish. At the end, we present two real cases of fluvial systems with different origins of arsenic exposure (natural vs. anthropogenic) that have improved our comprehension of arsenic biogeochemistry and toxicity in freshwaters, the Pampean streams (Argentina) and the Anllóns River (Galicia, Spain). We finish with a briefly discussion of what we consider as future research needs on this topic. This work especially contributes to the general understanding of biofilms influencing arsenic biogeochemistry and highlights the strong impact of nutrient availability on arsenic toxicity for freshwater (micro) organisms. MDPI 2020-03-30 2020-04 /pmc/articles/PMC7177459/ /pubmed/32235625 http://dx.doi.org/10.3390/ijerph17072331 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Review Barral-Fraga, Laura Barral, María Teresa MacNeill, Keeley L. Martiñá-Prieto, Diego Morin, Soizic Rodríguez-Castro, María Carolina Tuulaikhuu, Baigal-Amar Guasch, Helena Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review |
title | Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review |
title_full | Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review |
title_fullStr | Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review |
title_full_unstemmed | Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review |
title_short | Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review |
title_sort | biotic and abiotic factors influencing arsenic biogeochemistry and toxicity in fluvial ecosystems: a review |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7177459/ https://www.ncbi.nlm.nih.gov/pubmed/32235625 http://dx.doi.org/10.3390/ijerph17072331 |
work_keys_str_mv | AT barralfragalaura bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview AT barralmariateresa bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview AT macneillkeeleyl bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview AT martinaprietodiego bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview AT morinsoizic bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview AT rodriguezcastromariacarolina bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview AT tuulaikhuubaigalamar bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview AT guaschhelena bioticandabioticfactorsinfluencingarsenicbiogeochemistryandtoxicityinfluvialecosystemsareview |