Diatom and Pollen Evidence of Holocene Vegetation Dynamics and Human Impact on the Virennes Fenland (French Massif Central)

Cubizolle, Hervé; Serieyssol, Karen K.; Argant, Jacqueline

doi:10.1080/0269249x.2005.9705635

Cited by 15 publications

(11 citation statements)

References 6 publications

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“…Diot and Baudrimont [82], from the Boëme Valley peat bog (Charente, France), showed a high sensitivity of diatoms to changes in water level, presumably the result of climatic changes in the rainfall regime, with greater abundance of total diatoms, diversity and proportion of (tycho-)planktonic diatoms (i.e., Ellerbeckia arenaria, Melosira varians, and Ulnaria ulna) in humid periods compared to dry periods, also concordant with the record of gastropod remains and pollen records. Diot and Baudrimont [82] suggested the potential of diatoms in the refinement of paleoenvironmental interpretations as paleoecological indicators of the peatland local conditions; this feature is also emphasized by recent authors [60,61,64,87].…”

Section: Diatoms Paleoenvironmental Studies In Peatlandsmentioning

confidence: 88%

“…Moreover, the Virennes fen and the La Prenarde-Pifoy mire evidence the great impact of agriculture on fragile oligotrophic peatland ecosystems and the high sensitivity of diatoms to slight changes in nutrient levels [60,61]. The Virennes fen formed at 3518 ± 169 years cal BP, also with important changes in diatom communities due to an increase in nutrient input and a decrease in water level, which was caused by increasing agricultural activity in the basin.…”

Section: Diatoms As Indicators Of Human Impact On Peatlandsmentioning

confidence: 99%

“…However, evidence suggests that the conservation status of diatom valves in paleoenvironmental records in minerotrophic peatlands is good [25]. The method generally used in the extraction of diatoms from peat is acid digestion (e.g., [58][59][60][61]), which was improved and standardized by Serieyssol et al [62].…”

Section: Diatom Preservation In Peatmentioning

confidence: 99%

“…On the other hand, abundant empirical evidence from paleoenvironmental studies in minerotrophic bogs shows acceptable concentrations of highly preserved frustules in high-latitude minerotrophic bogs in America (e.g., [51,53,56,59,74,75]), Asia (e.g., [76][77][78]), and Europe (e.g., [63,[79][80][81]), but also in Southern Europe, in several peatlands of the Aquitania Basin area [82], French Massif Central (France) [60,61,83,84], and Central Sredna Gora Mountains (Bulgaria) [85][86][87] (Table 1 and Figure 1). Exceptionally, peatlands at even lower latitudes in the Badda peak, of more than 4000 m altitude, of the high Ethiopian mountain have diatoms with a good state of conservation as to be used in paleoenvironmental studies [88].…”

Section: Diatom Preservation In Peatmentioning

confidence: 99%

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Diatoms in Paleoenvironmental Studies of Peatlands

Carballeira

Pontevedra-Pombal

2020

Quaternary

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The great diversity of diatoms in aquatic ecosystems and their close relationship with water chemistry make them one of the most informative and widely used biological proxies in paleoenvironmental studies of wetlands, except for peatland ecosystems. Currently, significant controversy still exists over the preservation of diatoms in peat. However, considerable evidence indicates that diatoms remain in good condition in minerotrophic peatlands, and they have been successfully used in paleoenvironmental studies in high-latitude regions and especially in Southern Europe.

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Section: Diatoms Paleoenvironmental Studies In Peatlandsmentioning

confidence: 88%

Section: Diatoms As Indicators Of Human Impact On Peatlandsmentioning

confidence: 99%

Section: Diatom Preservation In Peatmentioning

confidence: 99%

Section: Diatom Preservation In Peatmentioning

confidence: 99%

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Diatoms in Paleoenvironmental Studies of Peatlands

Carballeira

Pontevedra-Pombal

2020

Quaternary

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“…However, to date, only Cubizolle et al (2005) have reported on diatom evolution within peatlands for this region. Nevertheless, it covered a relatively short period because the peatlands at Virennes only developed during the second half of the Subboreal (3637-3398 cal bp), whereas Freycenet and Collanges peat formation started during the Boreal at 9445-9560 cal bp and 8547-8404 cal bp, respectively.…”

Section: Discussionmentioning

confidence: 99%

Holocene evolution of two ponds on the Devès Plateau in the French Massif Central

et al. 2012

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The siliceous sub-fossil content (diatoms, chrysophyte cysts, sponges and phytoliths) of two cores was studied to determine the evolution and environmental changes that have occurred since the formation of two fenland lakes, Lac de Collanges and Lac de Freycenet, on the Devès Plateau, Massif Central, France. Cluster analyses determined eight siliceous zones, whereas a detrended correspondence analysis showed similar changes occurring in both sites, and principal component analysis identified four major shifts occurring over time at both sites, corresponding to the establishment of the fenland, the development of a pond and changes in the terrestrial environment. Four classic pollen zones previously determined for the French Massif Central were recorded in the core. The Boreal and beginning of the Old Atlantic period (9445-9250 cal bp) are marked by the development of the fenland, a decrease in pine trees and loss of grassland. The siliceous component was dominated by chrysophyte cysts indicating a cooler and lower trophic level. The Atlantic period (8365-7852 cal bp) saw maximum expansion of the fenland and the first occurrence and dominance of Aulacoseira perglabra (Østrup) Haworth, indicating higher water levels as a result of climate change. Increasing numbers of sponge spicules and the decrease in A. perglabra showed a shift to dryer conditions. During this phase, greater and more frequent droughts occurred in Collanges compared with Freycenet, most likely due to its smaller drainage basin. With the Subboreal, around 5000 cal bp, a change in conditions occurred: A. lacustris (Grunow) Krammer became the most important centric diatom and phytoliths became an important component. Pine trees increased and total herb and grasses became more important. The increase in total herb and grass pollen, along with the major increase in phytoliths, indicated an increase in human agro-pastoral activity within the area. The Subatlantic saw a decrease in water levels with periods of desiccation. A cyclic pattern of wet and dry phases was documented by a diatom increase in regularly moist and mostly moist subaerial environments. Including counts of phytoliths, sponges and chrysophyte cysts with diatoms allows better interpretation of the changes occurring over time within the area and permitted determination of the arrival of human agro-pastoral activity. The other three groups, namely phytoliths, sponges and cysts, were particularly useful when certain samples contained very few or were totally devoid of diatoms.

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Ecological distribution of modern diatom in peatlands in the northern Greater Khingan Mountains and its environmental implications

Han

Sun

Cong

et al. 2022

Environ Sci Pollut Res

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Relationships between diatoms assemblages and environmental variables in peatlands of the northern Greater Khingan Mountains is helpful for understanding the indicative signi cance of diatoms to environment changes, and potentially provides a reference for environmental monitoring and paleoenvironment reconstruction in the edge of monsoon region. In this study we analyzed modern diatom distribution and explored the relationships between diatoms assemblages and 11 environment factors in 30 shrubby-herbaceous and herbaceous peatlands based on ordination analysis. Benthic and epiphytic Pennatae diatoms are mainly ecological types, whereas planktonic Centricae diatoms are relatively fewer. The most diverse genera are Navicula, Pinnularia and Eunotia. Eunotia paludosa and Achnanthes minutissima dominated in shrubby-herbaceous peatlands, while Navicula minima and Fragilaria capucina dominated in herbaceous peatlands. The diatom community structures are different in different vegetation types and the diatom species diversity in herbaceous peatlands is higher than in shrubby-herbaceous peatlands. COD Mn and pH are the most important environmental factors affecting diatom species composition and diversity. Eunotia bilunaris var. bilunaris, Eunotia mucophila and Eunotia paludosa can be used as indicators of acidic water environments. Caloneis silicula, Fragilaria capucina, Hantzschia amphioxys and Navicula radiosa can be applied to indicate the weak alkaline water conditions. Eunotia bilunaris var. bilunaris and Eunotia paludosa can indicate low conductivity, while Navicula pupula indicates the medium-high conductivity. Fragilaria capucina and Navicula radiosa can indicate water nutrients states.

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Diatom and Pollen Evidence of Holocene Vegetation Dynamics and Human Impact on the Virennes Fenland (French Massif Central)

Cited by 15 publications

References 6 publications

Diatoms in Paleoenvironmental Studies of Peatlands

Diatoms in Paleoenvironmental Studies of Peatlands

Holocene evolution of two ponds on the Devès Plateau in the French Massif Central

Ecological distribution of modern diatom in peatlands in the northern Greater Khingan Mountains and its environmental implications

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