Erosion of cohesive bottom sediments: The influence of benthos

Brekhovskikh, V. F.; Debolsky, V. K.; Vishnevskaya, G. N.; Zolotareva, N. S.

doi:10.1080/00221689109499000

Cited by 10 publications

(11 citation statements)

References 10 publications

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“…In soft substrates, invertebrates can move easily by disturbing the sediment structure (BREKHOVSKIKH et al, 1991), whereas in hard substrates, the structure remains more stable and invertebrates can move or swim within the interstices. In this latter case to which our study refers, the features of the interstices also control the retention and thus the distribution of bioavailable organic matter (see BRUNKE and GONSER, 1997), that can create confounding patterns.…”

Section: Discussionmentioning

confidence: 98%

Influence of Bed‐Sediment Features on the Interstitial Habitat Available for Macroinvertebrates in 15 French Streams

Gayraud

Philippe²

2003

International Review of Hydrobiology

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The interstitial space of bed-sediments is a major component of the stream system as it influences both physical and biological processes and patterns, such as exchanges between surface water and groundwater or the assemblage of invertebrates. To investigate the influence of grain-size distribution and vertical bed-packing on the interstitial habitat, we used 99 frozen cores collected from 15 French streams. On our data, overall invertebrate density, density of Chironomidae and taxon richness were more strongly related to effective porosity than to other physical variables describing bed-sediments. We built two models to quantify the influence of grain-size distribution and vertical bed-packing on effective porosity. The effective porosity decreased with increasing grain-size heterogeneity and was strongly related to grain-size distribution. These relationships differed with vertical bed-packing, but were consistent across three geologic types of sediments that varied in particle shape and particle texture. These general relationships suggest that effective porosity could be helpful to better understand the distribution patterns of invertebrates in bed-sediments.

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Section: Discussionmentioning

confidence: 98%

Influence of Bed‐Sediment Features on the Interstitial Habitat Available for Macroinvertebrates in 15 French Streams

Gayraud

Philippe²

2003

International Review of Hydrobiology

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“…Most of the species showed chloroplasts indicating the living status of the algae and all algae found are known to be ubiquitous species with high tolerance in terms of nutrient concentrations and water quality (Backhaus & Kemball, 1978). Only two species of Centrales were found (Melosira varians, and Stephanodiscus hantzschii) and only the latter represents a bed-deposited phytoplankton species, which emphasises the occurrence of a ''real'' microphytobenthos at this study site (Krammer & Lange-Bertalot, 1986-1991. The chlorophyll a concentrations, as an indicator for the microalgal biomass at the sediment surface, were in the range of 11-54 mg g À1 DW with minimum and maximum values of 2 and 82 mg g À1 DW, respectively, over the course of the year.…”

Section: Article In Pressmentioning

confidence: 96%

“…These are regarded as the most common group of benthic microalgae in cohesive sediments (Underwood, 1994). Achnanthes minutissima, Amphora ovalis, Cymatopleura solea, Diatoma vulgaris, Navicula lanceolata, Navicula tripunctata, Nitzschia constricta, Nitzschia sigmoidea, Nitzschia vermicularis, Surirella brebissonii (Bacillariophyceae, Pennales) represent a selection of the species determined for the Lauffen study site (Krammer & Lange-Bertalot, 1986-1991Lange-Bertalot, 1997). Most of the species showed chloroplasts indicating the living status of the algae and all algae found are known to be ubiquitous species with high tolerance in terms of nutrient concentrations and water quality (Backhaus & Kemball, 1978).…”

Section: Article In Pressmentioning

confidence: 99%

“…Most studies considering biological effects on erosion resistance were carried out on tidal flats with totally different abiotic properties and benthic communities compared to inland rivers (de Brouwer, de Deckere, & Stal, 2003;de Brouwer, Ruddy, Jones, & Stal, 2002;Perkins et al, 2003). In river sediments, the influence of biological properties on sediment stability has been investigated mainly in the laboratory under artificial conditions (Brekhovskikh, Debolsky, Vishnevskaya, & Zolotareva, 1991;Droppo, Lau, & Mitchell, 2001). In general, studies including biological stabilisation factors of sediment concentrate on biofilms.…”

Section: Introductionmentioning

confidence: 99%

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Physico-chemical and biological sediment properties determining erosion resistance of contaminated riverine sediments – Temporal and vertical pattern at the Lauffen reservoir/River Neckar, Germany

2005

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In order to contribute to a reliable, easy-to-handle and economically viable erosion risk assessment of contaminated riverine sites, the present study aims to implement master-variables best characterising the sediment stability. Thus, a wide range of sediment properties was related to the critical shear stress for mass erosion, determined in the SETEG (Stroemungskanal zur Ermittlung der tiefenabhaengigen Erosionsstabilitaet von Gewaessersedimenten) pressurised channel, with special emphasis on vertical and temporal gradients in the Lauffen reservoir on the River Neckar. Over the course of 1 year, positive impacts of some macrofauna species and benthic diatoms on the sediment stability were detected for the sediment surface (0.5 cm). However, a high seasonal variability of biological parameters caused varying relations with erosion resistance in the upper sediment layers as shown for the colloidal carbohydrates. Considering only deeper sediment layers (5-35 cm), a more general pattern could be revealed with correlations between the critical shear stress and single sediment properties such as depth, grain size, total organic carbon (TOC), cation exchange coefficient (CEC), carbohydrates and proteins. Firstly, the influence of physico-chemical and biological properties on erosion resistance became evident, even over depths at 0-35 cm. Secondly, inter-particle forces are most important for erosion resistance. These are enhanced in fine-grained sediment layers, offering high binding capacities but also strengthened by polymeric substances permeating the void space and coating particles. These covariance patterns of sedimentological and biological parameters are addressed by multivariate statistical tests (principal component analysis), resulting in a higher magnitude of the correlation coefficient between critical shear stress and the master-variables in main component II (polymeric substances, grain size, TOC, CEC; R ¼ 0:77) compared to single correlations.

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“…They measured PH, SAR, total amount of dissolved salts (TDS), exchangeable sodium percentage (ESP), sodium percentage (PS), and CEC for their samples and found that the eroded slopes have higher PH, SAR, and PS than the non-eroded slopes. Also, they hypothesized Table 1 Potential factors that may influence cohesive soil behavior (Winterwerp, Cornelisse, & Kuijper, 1990;Berkhovskikh, Debolsky, Vishnevskaya, & Zolotareva, 1991;Huang et al, 2006;Meng et al, 2012;and Kimiaghalam, Goharrokhi, Clark, & Ahmari, 2013 (Alberts et al, 1995;Bubenzer, 2001a, 2001b;Gyssels, Poesen, Van Dessel, Knapen, & Debaets, 2006). This study focused on the erosion of cohesive riverbanks in Manitoba, Canada where erosion has caused considerable damage to shorelines within the Province.…”

Section: Introductionmentioning

confidence: 95%

An experimental study on the effects of physical, mechanical, and electrochemical properties of natural cohesive soils on critical shear stress and erosion rate

Kimiaghalam

Clark

Ahmari

2016

International Journal of Sediment Research

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Erosion of cohesive bottom sediments: The influence of benthos

Cited by 10 publications

References 10 publications

Influence of Bed‐Sediment Features on the Interstitial Habitat Available for Macroinvertebrates in 15 French Streams

Influence of Bed‐Sediment Features on the Interstitial Habitat Available for Macroinvertebrates in 15 French Streams

Physico-chemical and biological sediment properties determining erosion resistance of contaminated riverine sediments – Temporal and vertical pattern at the Lauffen reservoir/River Neckar, Germany

An experimental study on the effects of physical, mechanical, and electrochemical properties of natural cohesive soils on critical shear stress and erosion rate

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