Variability of diatom community composition and structure in mountain streams release_mqmfcucpmrgmjjry32ohcxcyhq

by Lorena González-Paz, María Comesaña, Isabel Pardo, José Barquín, Alejandra Goldenberg-Vilar, Cristina Delgado

Published in Hydrobiologia by Springer Science and Business Media LLC.



<jats:title>Abstract</jats:title>Small rivers support high levels of biodiversity, being especially sensitive to the effects of global change. Temporal records of community composition in minimally impaired streams can be used to explore trends in biodiversity in response to climate change and natural temporal variation. We approached the comparison of two time periods (2003–2008 and 2016–2020) to study whether the composition of diatom assemblages changed over time in twenty-three streams of the mountain range of Picos de Europa (Northern Spain). The stream's water chemistry indicated significant decreases in N_NO<jats:sub>3</jats:sub><jats:sup>−</jats:sup> and P_PO<jats:sub>4</jats:sub><jats:sup>3−</jats:sup> content over time. In these minimally disturbed streams, the specific diatom community was dominated by <jats:italic>Achnanthidium pyrenaicum</jats:italic>, <jats:italic>Achnanthidium minutissimum</jats:italic> and <jats:italic>Cocconeis euglypta</jats:italic>. PERMANOVA analyses did not identify significant changes in diatom assemblage composition between periods or river types. Diatom indices (e.g. IPS, NORTIdiat) indicated high or good ecological status and relatively high alpha diversity values were found in these mountain rivers during the studied years. Although diversity and evenness showed a significant decrease over time, the temporal stability of the river-type diatom reference community between the two periods should be considered as an indicator of biodiversity persistence of high importance when monitoring the ecological status following the reference condition approach.
In application/xml+jats format

Archived Files and Locations

application/pdf  1.5 MB
file_7v5iewkj2bgkfdqu6bi6pyl5uq (web) (webarchive)
Read Archived PDF
Preserved and Accessible
Type  article-journal
Stage   published
Date   2021-12-16
Language   en ?
Container Metadata
Not in DOAJ
In Keepers Registry
ISSN-L:  0018-8158
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: 34282115-7485-45ba-bcf3-276bfef3339b