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dc.contributor.author
Baffico, Gustavo Daniel
dc.date.available
2023-01-06T15:47:51Z
dc.date.issued
2021-09
dc.identifier.citation
Baffico, Gustavo Daniel; Spatial and seasonal changes in a naturally acidified river (Río Agrio, Argentina) and their effect on epilithic algae; Taylor & Francis Ltd; Inland Waters; 11; 3; 9-2021; 404-416
dc.identifier.issn
2044-2041
dc.identifier.uri
http://hdl.handle.net/11336/183750
dc.description.abstract
This study investigated seasonal changes in the longitudinal pH gradient of a naturally acidified river and how the attributes of epilithic algae (biomass, abundance, diversity) react to these variations. Five sites were selected on the Río Agrio river for in situ measurements, water sampling, and epilithic algae collection in different seasons from 2007 to 2018. Water pH increased along the length of the river, the average increase being highest in summer (from 2.5 to 7.0, acidity to neutrality) and lowest in spring (from 2.8 to 4.0, acidity to acidity). Conductivity and nutrient and ion concentrations decreased along the length of the river, showing a seasonal pattern of variation mainly influenced by the hydrological cycle. Epilithic algal biomass varied seasonally along the river, generally increasing in summer and decreasing in spring, with seasonal maximum values at different locations mainly associated with the dynamics of iron precipitation and nutrient availability. Species diversity and numbers were low at the most acidic site (regardless of season), but in the remaining sites these attributes tended to increase during summer–autumn and decrease during winter–spring. Statistical analysis showed that differences between sites responded mainly to the chemical gradient of the river and seasonality. Therefore, seasonal changes in the longitudinal chemical gradient of the river imposed differential, changing conditions on the epilithic algae present in each site, allowing identification of characteristic zones and their respective epilithic algal attributes. In the context of proposed models of ecosystem response to stress, similarities with systems acidified by anthropic activities are discussed.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Taylor & Francis Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ACIDIC WATERS
dc.subject
PATAGONIA
dc.subject
PERIPHYTON
dc.subject
PH GRADIENT
dc.subject.classification
Biología Marina, Limnología
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Spatial and seasonal changes in a naturally acidified river (Río Agrio, Argentina) and their effect on epilithic algae
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-10-06T13:13:23Z
dc.identifier.eissn
2044-205X
dc.journal.volume
11
dc.journal.number
3
dc.journal.pagination
404-416
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Baffico, Gustavo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
dc.journal.title
Inland Waters
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/20442041.2021.1933368
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/20442041.2021.1933368
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