2024-03-29T08:32:11Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2059632020-05-05T11:10:08Zcom_10261_88com_10261_8col_10261_341
DIGITAL.CSIC
author
Barral-Fraga, Laura
author
Barral, María Teresa
author
MacNeill, Keeley
author
Martiñá-Prieto, Diego
author
Morin, Soizic
author
Rodríguez-Castro, María Carolina
author
Tuulaikhuu, Baigal-Amar
author
Guasch, Helena
2020-03-31T10:21:27Z
2020-03-31T10:21:27Z
2020
International Journal of Environmental Research and Public Health 17 : 2331 (2020)
1661-7827
http://hdl.handle.net/10261/205963
1660-4601
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.
eng
openAccess
Ecotoxicology
Trophic interactions
Arsenic
Biofilms
Microalgae
Bacteria
Phosphate
Biogeochemistry
Speciation
Toxicity
Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review
artículo
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URL
https://digital.csic.es/bitstream/10261/205963/1/Guash%202020.pdf
File
MD5
33a9e7e50c1b0dc1a5112b5f07ef84e7
3772150
application/pdf
Guash 2020.pdf