Seasonal dynamics and storage of particulate organic matter within bed sediment of three streams with contrasted riparian vegetation and morphology

Maridet, L.; Philippe, Michel; Wasson, J.G.; Mathieu, J.

doi:10.1017/cbo9780511753381.010

Cited by 7 publications

(10 citation statements)

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“…The presence of fine sediments can inhibit access to trophic resources, with some species in other studies reported to be confined to areas of clean gravel (Wood & Armitage, 1999;Rabeni et al, 2005). The distribution of organic matter is also frequently patchy (Maridet et al, 1997;Wipfli et al, 2007), but typically higher volumes are recorded at riffle heads due to their proximity to upstream pools which are often a store of organic material (Mermillod-Blondin et al, 2000). Some of this material will be transported as suspended particulate organic matter and carried into the interstitial spaces of the sediments at the head of riffles (Pusch, 1996;Brunke & Gosner, 1999), and may explain the higher abundances of shredders recorded in these areas in this study.…”

Section: Riffle-scale Variability In Benthic Communitiesmentioning

confidence: 99%

Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions

2017

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The distribution of lotic fauna is widely acknowledged to be patchy reflecting the interaction between biotic and abiotic factors. In an in situ field study, the distribution of benthic and hyporheic invertebrates in the heads (downwelling) and tails (upwelling) of riffles were examined during stable baseflow conditions. Riffle heads were found to contain a greater proportion of interstitial fine sediment than riffle tails. Significant differences in the composition of benthic communities were associated with the amount of fine sediment. Riffle tail habitats supported a greater abundance and diversity of invertebrates sensitive to fine sediment such as EPT taxa. Shredder feeding taxa were more abundant in riffle heads suggesting greater availability of organic matter. In contrast, no significant differences in the hyporheic community were recorded between riffle heads and tails. We hypothesise that clogging of hyporheic interstices with fine sediments may have resulted in the homogenisation of the invertebrate community by limiting faunal movement into the hyporheic zone at both the riffle heads and tails. The results suggest that vertical hydrological exchange significantly influences the distribution of fine sediment and macroinvertebrate communities at the riffle scale.

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Section: Riffle-scale Variability In Benthic Communitiesmentioning

confidence: 99%

Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions

2017

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“…Such trapping of organic matter is usual in streams of forested areas and represents an important source of energy for the whole stream system (e.g. Maridet et al, 1997;Boulton and Forster, 1998).…”

Section: Spatial and Seasonal Distribution Of Organic Matter And Finementioning

confidence: 99%

“…If not limited by a lack of oxygen or interstitial space, the density of the fauna often correlates positively with organic matter (Strayer et al, 1997). The amount of organic matter in streams is influenced by riparian vegetation and sediment retentiveness (Maridet et al, 1996(Maridet et al, , 1997 and its distribution within the bed sediment is determined by flow conditions and sediment structure (Bretschko and Leichtfried, 1988;Boulton and Forster, 1998). The relationship between organic and inorganic fine particles is important for density and composition of interstitial fauna (Brunke and Gonser, 1999), and likewise the association between sediment grains and the microbial biofilm (Bretschko and Leichtfried, 1988;Bärlocher and Murdoch, 1989; Ward et al, 1998;Boulton, 2000).…”

Section: Introductionmentioning

confidence: 99%

Organic matter and fine grains as possible determinants of spatial and seasonal variability in bed sediment fauna: A case study from a Hercynian gravel stream

Omesová

Helešic

2010

Limnologica

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a b s t r a c tThe spatial and seasonal distributions of organic matter and fine grains were tested as possible determinants of fauna distribution in bed sediment of a Hercynian gravel stream. Invertebrate densities and the amounts of fine grains and organic carbon were assessed in freeze-core samples taken along 70 cm depth profiles at three different positions in the stream channel. Sampling was conducted on five occasions of low discharge over two years. The variability in invertebrate community composition was analysed using Detrended Correspondence Analysis with posterior projection of explanatory variables; Variation Partitioning was used to estimate the independent and shared effects of the explanatory variables. We found that the best predictors of the invertebrate community were spatial variables (depth, position in the channel) and then variables influenced by seasonal patterns (surface water temperature and discharge). The influence of organic matter and fine grain content was significant only after eliminating spatial autocorrelation. High amounts of organic matter, randomly accumulated in the sediment, improved the model by explaining high fauna densities. The fine grain content was not a limiting factor to fauna at our study site. It is possible that the large amount of mica flakes in the sediment has caused the arrangement of grains with a pore space sufficient for fauna even when fine grain content was high.

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“…Les légères variations de cette richesse spécifique sont essentiellement dues aux confluences avec les sources et aux caractéris-tiques mésologiques proches des stations, en particulier à l'existence plus ou moins importante de la ripisylve. Cette dernière joue, en effet, un rôle important dans le fonctionnement de l'hydrosystème (source maJiéUre^^^Bère-brganique, stabilité des berges et diversité d'habitats pour les insectes aquatiques grâce à son réseau racinaire et aux branches qui tombent dans l'eau) et, par conséquent, contribue largement à l'installation d'une faune riche et diversifiée (Maridet et al 1996(Maridet et al , 1997.…”

Section: Discussion Et Conclusionunclassified

Etude hydrobiologique d'un cours d'eau du Moyen-Atlas : l'oued Tizguit (Maroc)

Touabay

Aouad

Mathieu

2002

Ann. Limnol. - Int. J. Lim.

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The aim of this study is to gain a better understanding of the water quality and the benthic macrofauna of Moroccan rivers from the Moyen-Atlas. The Tizguit wadi was chosen for its accessibility and its environmental variability. Eight physical and chemical factors were measured and the fauna inventory was made at 11 sites during an hydrological cycle. The results showed that changes occurred along an upstream-downstream gradient. The number of sampled taxa was 167 belonging to different groups, where Coleóptera were dominant. The distribution of this fauna depends mainly on the environmental factors, and the originality of its composition depends on the water quality.

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Seasonal dynamics and storage of particulate organic matter within bed sediment of three streams with contrasted riparian vegetation and morphology

Cited by 7 publications

References 0 publications

Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions

Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions

Organic matter and fine grains as possible determinants of spatial and seasonal variability in bed sediment fauna: A case study from a Hercynian gravel stream

Etude hydrobiologique d'un cours d'eau du Moyen-Atlas : l'oued Tizguit (Maroc)

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