Distribution of Diatom, Macrophyte and Benthic Macroinvertebrate Communities Related to Spatial and Environmental Characteristics: The Example of a Cut-Off Meander of the River Allier (France)

Beauger, Aude; Delcoigne, Arnaud; Voldoire, Olivier; Serieyssol, Karen K.; Peiry, Jean‐Luc

doi:10.7872/crya/v36.iss3.2015.323

Cited by 10 publications

(4 citation statements)

References 67 publications

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“…Therefore, the overall Allier River represents an opportunity to investigate alluvial and riparian vegetation processes adjusting to climate and catchment changes. More precisely, the study site is located around the Auzon Oxbow, one of the fluvial annexes of the Allier River in the upper river basin [ 51 , 52 ]. Oxbows are specific wetlands in the vicinity of river systems that play a crucial socio-economic and environmental role.…”

Section: Methodsmentioning

confidence: 99%

ConnecSenS, a Versatile IoT Platform for Environment Monitoring: Bring Water to Cloud

Moiroux-Arvis

Royer

Sarramia

et al. 2023

Sensors

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Climate change is having an increasingly rapid impact on ecosystems and particularly on the issue of water resources. The Internet of Things and communication technologies have now reached a level of maturity that allows sensors to be deployed more easily on sites to monitor them. The communicating node based on LoRaWAN technology presented in this article is open and allows the interfacing of numerous sensors for designing long-term environmental monitoring systems of isolated sites. The data integration in the cloud is ensured by a workflow driving the storage and indexing of data, allowing a simple and efficient use of the data for different users (scientists, administration, citizens) through specific dashboards and extractions. This article presents this infrastructure through environmental monitoring use cases related to water resources.

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Section: Methodsmentioning

confidence: 99%

ConnecSenS, a Versatile IoT Platform for Environment Monitoring: Bring Water to Cloud

Moiroux-Arvis

Royer

Sarramia

et al. 2023

Sensors

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“…Thus, a diatom-Lemna inference tool has much utility in terms of reconstructing the past ecology of ponds, with the same potentially true of shallow lakes and indeed larger lakes under certain circumstances across the globe (Duarte and Kalff 1990) where high Lemna-coverage occurs. For example, dominance of free-floating mats of lemnids have also occurred in Lake Maracaibo, Venezuela and Lake Titicaca, Peru due to increased nutrient inputs (Cruz et al 2006), and seasonal blooms of duckweeds have also been observed in cut-off meanders in large rivers (Beauger et al 2015). Significant relationships between L. hungarica and duckweed have been demonstrated for a variety of climatic conditions and waterbody types in many parts of the world including Canada (Goldsborough 1993(Goldsborough , 1994, USA (Zuberer 1984;Desianti 2012), Brazil (Garcia and Fonseca de Souza 2006) and substantial tracts of Europe (Buczkó 2007;Emson 2015).…”

Section: Discussionmentioning

confidence: 99%

Mission possible: diatoms can be used to infer past duckweed (lemnoid Araceae) dominance in ponds

et al. 2017

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Compared to larger lakes, ponds have rarely been the focus of palaeoecological studies. A common feature of ponds, especially those subject to eutrophication, is mass surface coverings of lemnoid Araceae (duckweed) which have severe implications for ecological processes in small waterbodies, in particular lowered oxygen content. To help understand the implications of duckweed dominance for the longterm ecology of ponds, and to determine the potential for palaeoecological studies in ponds more generally, we develop a new diatom-based Lemna-indicator metric. Recent studies of diatom host-plant relationships have shown significant associations between duckweed and the epiphytes Lemnicola hungarica and Sellaphora saugerresii (formally known as Sellaphora seminulum). To determine the potential of these species as palaeo-indicators of long-term duckweed dynamics in ponds, we investigated the diatom composition of surface sediment assemblages in sets of duckweed and non-duckweed-dominated ponds in Norfolk, eastern England. In addition, we undertook diatom analysis of two cores from a small farmland pond (Bodham Rail Pit) subject to a known duckweed dominance event (1999)(2000)(2001)(2002)(2003)(2004)(2005). Both L. hungarica and S. saugerresii were significant predictors of past Lemna dominance in the surface sediments. Further, in the core study, both diatom species accurately and closely tracked the documented ''on-off'' duckweed cycle. Our study suggests huge potential for using ponds in palaeoecological studies and for diatombased investigations of floating plant histories.

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“…Cluster analysis using two-way indicator species analysis (TWINSPAN; Hill 1979) was used to determine the main diatoms assemblages composed by groups of surface sediment samples with homogeneous taxonomic composition. TWINSPAN is a topdown, divisive clustering method that is frequently used to classify biological community datasets, including diatom assemblages (Flower and Nicholson, 1987;Gesierich and Kofler, 2010;Mackay et al, 2012;Beauger et al, 2015;Feret et al, 2017). Species with number of occurrences <2 were excluded from the analysis.…”

Section: Surface Sediment Datasetmentioning

confidence: 99%

A record of Holocene climate changes in central Asia derived from diatom-inferred water-level variations in Lake Kalakuli (Eastern Pamirs, western China)

2022

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The unique geographical and climatic settings of the eastern Pamirs make this region sensitive to the Westerlies and global climate change. Holocene fluctuations in water-level of Lake Kalakuli, a proglacial lake located to the northwest of the Muztag Ata glacier, were reconstructed based on diatoms from a ∼15 m long sediment core spanning the last ∼9,900 years. To establish how diatom species distribute in relation to water depth in Lake Kalakuli, a dataset of 45 surface sediment samples was retrieved from different water depth. Statistical analyses such as cluster analysis (TWINSPAN) and redundancy analysis (RDA) were used to demonstrate that the water depth gradient is the main environmental gradient driving the distribution of these diatom assemblages. A diatom-water depth transfer function, was then developed using a weighted averaging partial least squares component 2 model (R2 = 0.89, RMSEP = 1.85 m) and applied to the Holocene diatom sequence from Lake Kalakuli. Due to the large residual errors in the model only the general trends in water level are proposed. Effective moisture increased rapidly during the early Holocene, as the water depth reached a high level from the lowest level within about two thousand years. Only small amplitude fluctuations were recorded during the mid- and late Holocene until the last few hundred years when a marked increase occurred. Changes in summer insolation over the northern hemisphere drove the advances and retreats of the Muztag Ata glacier, which in turn controlled the fluctuations of water level in this lake. The diatom-derived paleoclimatic trend from Lake Kalakuli is consistent with the Holocene climate evolution in the Westerlies-dominated area of Central Asia.

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Distribution of Diatom, Macrophyte and Benthic Macroinvertebrate Communities Related to Spatial and Environmental Characteristics: The Example of a Cut-Off Meander of the River Allier (France)

Cited by 10 publications

References 67 publications

ConnecSenS, a Versatile IoT Platform for Environment Monitoring: Bring Water to Cloud

ConnecSenS, a Versatile IoT Platform for Environment Monitoring: Bring Water to Cloud

Mission possible: diatoms can be used to infer past duckweed (lemnoid Araceae) dominance in ponds

A record of Holocene climate changes in central Asia derived from diatom-inferred water-level variations in Lake Kalakuli (Eastern Pamirs, western China)

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