Periphyton development in relation to macro‐scale (geology) and micro‐scale (velocity) limiters in two gravel‐bed rivers, New Zealand

Biggs, Barry J. F.; Gerbeaux, P.

doi:10.1080/00288330.1993.9516544

Cited by 67 publications

(39 citation statements)

References 29 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, in slow flow, heterotrophs may also depend more on internal carbon sources, such as extracellular release from algae (Haack & McFeters 1982, Kaplan & Bott 1989, Jones & Lock 1993. As in other reports, we found higher chl a concentrations in slow flow which would potentially allow a better supply of heterotrophs with algae-derived organic carbon (Biggs & Gerbeaux 1993, Battin et al 2003a. While the supply flux of carbon from the water column to the biofilm is unidirectional and downward in direction, algae as in- 81 Aquat Microb Ecol 62: 71-83, 2011 ternal carbon sources may be located at various biofilm depths, potentially leading to higher heterogeneity of substrate supply and thus dampening metabolic stratification.…”

supporting

confidence: 71%

Monomeric carbohydrate uptake and structure–function coupling in stream biofilms

Singer¹,

Besemer²,

Hochedlinger³

et al. 2011

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

We investigated the uptake of monomeric carbohydrates in stream biofilms under various hydrodynamic environments. Flow velocity and biofilm structure influenced the uptake of glucose (Glc) and arabinose (Ara), 2 carbohydrate monomers differing in bioavailability. While the uptake of Glc increased with flow velocity, the uptake of Ara showed a weaker and inverse relationship with flow velocity. Microautoradiography and confocal-laser-scanning-microscopy of biofilm cryosections revealed patterns of monomer uptake over biofilm depth. Glc was preferentially taken up in the biofilm canopy, and modelled depth gradients suggested that boundary layer thickness controls external Glc mass transfer to the biofilm. In contrast, Ara uptake was uniformly distributed or concentrated in deeper biofilm layers. Overall, Glc uptake was negatively correlated with Ara uptake. We suggest that the spatial separation of monomer uptake involves unidirectional supply flux to biofilms and selective use of carbon sources of differing quality. This 'metabolic stratification' can be interpreted as an expression of the long-known carbon catabolite repression phenomenon initially described as 'diauxie' by Jacques Monod in 1942.KEY WORDS: Stream · Carbohydrate monomer · Hydrodynamics · Biofilm · Carbon catabolite repression · Mass transfer · Diauxie Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 62: [71][72][73][74][75][76][77][78][79][80][81][82][83] 2011 (Wetzel 1992). This pool provides a supplement to the heterotrophic ecosystem metabolism (Tranvik & Höfle 1987, Moran & Hodson 1994, Volk et al. 1997) and contributes to the longitudinal metabolic linkage of lotic ecosystems at larger spatial scales (Battin et al. 2003a, Kaplan & Newbold 2003.Biofilms are attached microbial communities with a spatially explicit organisation which offer ample opportunities for biotic interaction, such as co-metabolism and mutualism (Hansen et al. 2007). In streams, biofilms typically dominate microbial life and greatly influence carbon cycling (Lock et al. 1984, Battin et al. 2008. DOC uptake from the bulk liquid by biofilms is traditionally considered to be controlled by an external resistance to diffusion, imposed by the boundary layer, and by an internal resistance attributable to biofilm architectural features (Gantzer et al. 1988, Grady et al. 1999, De Beer & Kühl 2001. The intrinsic bioavailability of a given DOC molecule supposedly influences the extent of exogenous controls on its metabolism, such as the boundary layer thickness. The uptake of highly bioavailable substances, such as monomeric glucose (Glc), is at least partially controlled by hydrodynamics (Kaplan & Newbold 2003). In contrast, intrinsically less bioavailable molecules, such as arabinose (Ara), have a lower uptake rate within the biofilm; they build up lower concentration gradients across the boundary layer and should therefore be less influenced by flow conditions (Kaplan & Newbold 2003). Wholeecosystem and mesocosm experim...

show abstract

supporting

confidence: 71%

Monomeric carbohydrate uptake and structure–function coupling in stream biofilms

Singer¹,

Besemer²,

Hochedlinger³

et al. 2011

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

show abstract

“…If the drag induced by the development of the mat under a given water velocity exceeds its own tensile strength, then the mat (or portions of it) will be torn from the substratum and this will limit the amount of biomass which can accrue. The higher the velocity the less the peak in biomass which would be expected (Biggs & Gerbeaux 1993). Several studies report results which support this velocity-periphyton accrual conceptual model (e.g., Ghosh & Gaur 1991;Biggs & Stokseth 1996), although there is some variation among rivers and experiments which indicate that the model may not always apply (e.g., Peterson & Stevenson 1990;Poff et al 1990;Biggs & Stokseth 1996).…”

Section: Introductionmentioning

confidence: 73%

Flood and velocity effects on periphyton and silt accumulation in two New Zealand rivers

Jowett

Biggs

1997

New Zealand Journal of Marine and Freshwater Research

Self Cite

View full text Add to dashboard Cite

Effects of water velocity on the accumulation of periphyton and silt were investigated in two unenriched rivers (Tongariro and West Kowai Rivers) of New Zealand. Artificial substrata were incubated for up to 5 weeks in areas of moderate (0.2-0.5 m s -1 ) and high (0.6-0.9 m s -1 ) velocity. In the Tongariro River, periphyton accrual was significantly higher in moderate velocities than in high velocities, but not in the West Kowai River. The accumulation of silt was significantly higher under the moderate velocity treatment in both rivers. Silt densities were closely correlated with periphyton chlorophyll a and stepwise multiple regression analysis indicated that periphyton biomass was a more significant determinant of silt densities than water velocity. Neither chlorophyll a nor silt densities showed any significant variation with depth within the ranges measured (0.2-0.6 m). Several floods occurred during the study period and these, together with water velocities greater than c. 0.3 m s -1 , tended to affect periphyton ash-free dry mass (AFDM) and silt more than they affected chlorophyll a. It appeared that growing periphyton were resisting the effects of high shear stress and that unattached inorganic and organic particles were flushed from the periphyton matrix during higher flows. Spatial variation in periphyton and silt Received 23 September 1996; accepted 2 May 1997 accrual as functions of velocity and depth were too variable to be useful for prediction of abundance and distribution using hydraulic-habitat models. M96074

show abstract

“…Impaired steams are often under multiple stresses (European Commission, 2003) and diatom metrics such as life-forms and ecological guilds are known to be strongly correlated with nutrient and organic matter concentrations (e.g., Passy, 2007;Berthon et al, 2011) but also with parameters that were not assessed in this study, such as river size and geology (e.g., Biggs and Gerbeaux, 1993;Cattaneo et al, 1997;Passy, 2007;Song, 2007). An approach based on ecological guilds and life forms is suitable to disentangle the interactions of multiple stressors and understand how nutrients, water flow and substrates shape diatom communities (Lange et al, 2015).…”

Section: Discussionmentioning

confidence: 96%

Modelling diatom life forms and ecological guilds for river biomonitoring

Marcel¹,

Berthon²,

Castets³

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

-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 ...

show abstract

Periphyton development in relation to macro‐scale (geology) and micro‐scale (velocity) limiters in two gravel‐bed rivers, New Zealand

Cited by 67 publications

References 29 publications

Monomeric carbohydrate uptake and structure–function coupling in stream biofilms

Monomeric carbohydrate uptake and structure–function coupling in stream biofilms

Flood and velocity effects on periphyton and silt accumulation in two New Zealand rivers

Modelling diatom life forms and ecological guilds for river biomonitoring

Contact Info

Product

Resources

About