Ecological diatom guilds are useful but not sensitive enough as indicators of extremely changing water regimes

B‐Béres, Viktória; Török, Péter; Kókai, Zsuzsanna; T‐Krasznai, Enikő; Tóthmérész, Béla; Bácsi, István

doi:10.1007/s10750-014-1929-y

Cited by 42 publications

(21 citation statements)

References 30 publications

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“…We found that in MMI-3 (salt depressions), increasing AMD impacts were associated with an increase in attached diatoms, either by mucilage pad, dominated by Ctenophora and Encyonopsis, or by valve face, adnate diatoms, dominated by Cocconeis, as well as an increase in pad-attaching, ribbon-shaped colonies (comprised of Synedra fasciculata). These results are in line with other studies that have reported the same genera in highly disturbed environments (e.g., B-Béres et al, 2014;Passy, 2007a;Stenger-Kovács et al, 2013;, including AMD altered waters (e.g., Archibald and Taylor, 2007;Luís et al, 2009;Potapova and Charles, 2003). A positive correlation was also observed between AMD pollution and high profile diatoms which include Gomphonema, Ctenophora taxa and Synedra fasciculata.…”

Section: Metric Selectionsupporting

confidence: 92%

Development of a diatom-based multimetric index for acid mine drainage impacted depressional wetlands

Riato

Leira

Bella

et al. 2018

Science of The Total Environment

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Acid mine drainage (AMD) from coal mining in the Mpumalanga Highveld region of South Africa has caused severe chemical and biological degradation of aquatic habitats, specifically depressional wetlands, as mines use these wetlands for storage of AMD. Diatom-based multimetric indices (MMIs) to assess wetland condition have mostly been developed to assess agricultural and urban land use impacts. No diatom MMI of wetland condition has been developed to assess AMD impacts related to mining activities. Previous approaches to diatom-based MMI development in wetlands have not accounted for natural variability. Natural variability among depressional wetlands may influence the accuracy of MMIs. Epiphytic diatom MMIs sensitive to AMD were developed for a range of depressional wetland types to account for natural variation in biological metrics. For this, we classified wetland types based on diatom typologies. A range of 4-15 final metrics were selected from a pool of ~140 candidate metrics to develop the MMIs based on their: (1) broad range, (2) high separation power and (3) low correlation among metrics. Final metrics were selected from three categories: similarity to reference sites, functional groups, and taxonomic composition, which represent different aspects of diatom assemblage structure and function. MMI performances were evaluated according to their precision in distinguishing reference sites, responsiveness to discriminate reference and disturbed sites, sensitivity to human disturbances and relevancy to AMD-related stressors. Each MMI showed excellent discriminatory power, whether or not it accounted for natural variation. However, accounting for variation by grouping sites based on diatom typologies improved overall performance of MMIs. Our study highlights the usefulness of diatom-based metrics and provides a model for the biological assessment of depressional wetland condition in South Africa and elsewhere.

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Section: Metric Selectionsupporting

confidence: 92%

Development of a diatom-based multimetric index for acid mine drainage impacted depressional wetlands

Riato

Leira

Bella

et al. 2018

Science of The Total Environment

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“…In turn, Melosira varians was recorded in high abundance in water of the SM pond. This species is adapted to environments with high flow velocity and oxygen (B-Béres et al, 2014) and is a high-profile diatom, adapted to living in biofilms in which there is significant competition for space (Hoagland et al, 1982;Berthon et al, 2011). Regarding growth forms of algae, tadpoles mainly consumed motile algae or those exposed in the upper layers of biofilm, similar to the findings of other studies of grazing (Holomuzki et al, 2010;Cibils Martina et al, 2014).…”

Section: Discussionsupporting

confidence: 74%

Anuran larvae diet from agroecosystem’s ponds: environmental quality and implications for their populations

et al. 2016

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“…Increasing nutrient and organic matter contamination can modify the relative abundances of ecological guilds and life forms, as observed by Berthon et al (2011) in the Rhône river basin. Several authors reported a reduction in the abundance of the low-profile (LPG) and high profile guilds (HPG) and colonial life form as well as an increased abundance of the motile guild (MG) in contaminated sites (B-Béres et al, 2014;Berthon et al, 2011;Hlubiková et al, 2014). Acidic conditions can be favourable to either the high profile (Gottschalk and Kahlert, 2012) or the low profile (Pound et al, 2013) guild.…”

Section: Introductionmentioning

confidence: 99%

Modelling diatom life forms and ecological guilds for river biomonitoring

Marcel¹,

Berthon²,

Castets³

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

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-Biomonitoring is central to the European Union's Water Framework Directive (WFD) and to the French water and aquatic environmental law, but most diatom indices do not separate different anthropogenic impacts. To address this gap, the effect of water chemistry on diatom ecological guilds and life forms was assessed in order to indicate stream perturbations. Generalised additive models (GAMs) were built on a large-scale data set of 1571 samples from the French monitoring network. The relationships between diatom ecological guild and life form metrics were investigated by Principal components analysis and the results predicted by GAMs. The models characterised eight chemical parameters that modified adaptive strategies (ecological guilds) and growth morphology (life forms). Total phosphorus, conductivity, nitrate and pH are the main influencing factors, followed by temperature, dissolved oxygen and organic matter. The findings confirm three groups of diatoms with different adaptive strategies: 1 -fast moving species, 2 -species growing close to the substrate and 3 -species extending to the surface layers of the biofilm. Thirteen diatom metrics displayed a variety of responses to different ranges of the eight chemical parameters. These metrics could be used to help to identify and quantify which chemical alterations are caused by polluted effluents in rivers.Keywords: benthic diatoms / ecological guilds / biological traits / biomonitoring / generalised additive model Résumé -Modélisation des formes de vie et guildes écologiques des diatomées pour la bioindication en rivières. La bioindication est centrale dans la directive cadre européenne sur l'eau et la loi française sur l'eau, mais la plupart des indices diatomiques ne séparent pas les différents impacts anthropiques. Pour combler ce manque, l'effet de la physico-chimie de l'eau sur les guildes écologiques et formes de vies des diatomées a été étudié pour indiquer des perturbations des cours d'eau. Des modèles additifs généralisés (GAMs) ont été construits sur un jeu de données de 1571 échantillons des réseaux de suivi des cours d'eau français. Les relations entre les métriques de guildes écologiques et formes de vie des diatomées ont été étudiées par une ACP et les résultats prédits par des GAMs. Les modèles ont caractérisé huit paramètres physico-chimiques qui modifient les stratégies adaptatives (guildes écologiques) et morphologies de croissance (formes de vie). Le phosphore total, la conductivité, les nitrates et le pH sont les facteurs les plus influents, suivis par la température, l'oxygène dissous et la matière organique. Les résultats confirment trois groupes de diatomées avec des stratégies adaptatives différentes : 1 -les espèces se déplaçant rapidement, 2 -les espèces proches du substrat et 3 -les espèces s'étendant vers la surface du biofilm. Quatorze métriques diatomiques ont montré une variété de réponses à différentes gammes de valeurs des huit paramètres physico-chimiques. Ces métriques pourraient être utilisées pour aider à identifier ...

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Ecological diatom guilds are useful but not sensitive enough as indicators of extremely changing water regimes

Cited by 42 publications

References 30 publications

Development of a diatom-based multimetric index for acid mine drainage impacted depressional wetlands

Development of a diatom-based multimetric index for acid mine drainage impacted depressional wetlands

Anuran larvae diet from agroecosystem’s ponds: environmental quality and implications for their populations

Modelling diatom life forms and ecological guilds for river biomonitoring

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