Biogeochemistry of macrophytes, sediments and porewaters in thermokarst lakes of permafrost peatlands, western Siberia

Manasypov, Rinat M.; Pokrovsky, Oleg S.; Shirokova, Liudmila S.; Auda, Yves; Zinner, N. S.; Vorobyev, Sergey N.; Kirpotin, Sergey N.

doi:10.1016/j.scitotenv.2020.144201

Cited by 24 publications

(12 citation statements)

References 119 publications

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“…Moreover, the β-diversity, especially the β-diversity of abundant subcommunities, also had a significant relationship between sediment and water (Figure 5). These connections between sediment and water might be the results of thermokarst lakes formation and evolution processes, during which, nutrients and other elements are continuously released to water from permafrost and sediment (Mackelprang et al, 2017; In’T Zandt et al, 2020; Manasypov et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Permafrost is widespread in high latitude and high elevation regions, covering about one quarter of land surface in the Northern Hemisphere and experiencing severe warming than the remainder of the globe (Qiu and Cheng, 1995; Zhang et al, 1999). Thermokarst lakes are forming as a result of permafrost thaw, acting as an important and widespread aquatic ecosystems in cold regions (Kokelj and Jorgenson, 2013; Farquharson et al, 2016) with significant roles in hydrological, ecological, and biogeochemical processes (Chin et al, 2016; In’T Zandt et al, 2020; Manasypov et al, 2021). In Arctic and sub-Arctic area, thermokarst lakes cover up to 40% of the permafrost area (de Jong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…For thermokarst lakes, their formation (permafrost thaw) and evolution (horizontal and vertical permafrost degradation) mechanisms suggest that sediment and water have very close relationships in thermokarst lakes. Thermokarst processes stimulate the release of carbon, nutrients, and even heavy metals from deeper permafrost (sediment) to water and this releasing processes can be further accelerated by microbial activities and climate change (Bowden, 2010; In’T Zandt et al, 2020; Manasypov et al, 2021). Intensifying climate change is beginning to unlock more materials and microorganisms from sediment to water (Graham et al, 2012; Mackelprang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Abundant and rare bacterial taxa structuring differently in sediment and water in thermokarst lakes in the Yellow River Source area, Qinghai-Tibet Plateau

Zhang

et al. 2021

Preprint

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Thermokarst lakes are forming from permafrost thaw and severely affected by accelerating climate change. Sediment and water in these lakes are distinct habitats but closely connected. However, our understanding of the differences and linkages between sediment and water in thermokarst lakes remain largely unknow, especially from the perspective of bacterial community patterns and underlying mechanisms. In this study, we examined bacterial communities in sediment and water in thermokarst lakes in the Yellow River Source area, Qinghai-Tibet Plateau. Bacterial taxa were divided to abundant and rare according to their relative abundance, and the Sorensen dissimilarity (βsor) was partitioned into turnover (βturn) and nestedness (βnest). The results showed that the whole bacterial communities as well as the abundant and rare subcommunities differed substantially between sediment and water, in terms of taxonomical composition, α-diversity, and β-diversity. Sediment had significantly lower α-diversity indexes but higher β-diversity than water. Abundant taxa had significantly higher relative abundances but lower α-diversity and β-diversity than rare taxa. Moreover, bacterial communities are predominantly governed by strong turnover processes (βturn/βsor ratio of 0.925). Abundant subcommunities were significantly lower in βturn/βsor ratio compared to rare subcommunities. Bacterial communities in sediment had a significantly higher βturn/βsor ratio than in water. The results suggest that the bacterial communities of thermokarst lakes, especially rare subcommunities or particularly in sediment, might be strongly structured by environmental filtering and geographical isolation, leading to compositional distinct. By revealing bacterial communities in sediment and water, this integral study increased our current knowledge of thermokarst lakes, enhancing our understanding of the community assembly rules and ecosystem structures and processes of these rapid changing and vulnerable ecosystems.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Abundant and rare bacterial taxa structuring differently in sediment and water in thermokarst lakes in the Yellow River Source area, Qinghai-Tibet Plateau

Zhang

et al. 2021

Preprint

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“…Permafrost is widespread in high latitude and high elevation regions, covering approximately one-quarter of the land surface in the Northern Hemisphere and experiencing more severe warming than the remainder of the globe ( Qiu and Cheng, 1995 ; Zhang et al, 1999 ). Thermokarst lakes are forming as a result of permafrost thaw, acting as important and widespread aquatic ecosystems in cold regions ( Kokelj and Jorgenson, 2013 ; Farquharson et al, 2016 ) with significant roles in hydrological, ecological, and biogeochemical processes ( Chin et al, 2016 ; In’T Zandt et al, 2020 ; Manasypov et al, 2021 ). In the Arctic and sub-Arctic area, thermokarst lakes cover up to 40% of the permafrost area ( de Jong et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau

Ren

Zhang

et al. 2022

Front. Microbiol.

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Thermokarst lakes are forming from permafrost thaw and are severely affected by accelerating climate change. Sediment and water in these lakes are distinct habitats but closely connected. However, our understanding of the differences and linkages between sediment and water in thermokarst lakes remains largely unknown, especially from the perspective of community assembly mechanisms. Here, we examined bacterial communities in sediment and water in thermokarst lakes in the Yellow River Source area, Qinghai-Tibet Plateau. Bacterial taxa were divided into abundant and rare according to their relative abundance, and the Sorensen dissimilarity (βsor) was partitioned into turnover (βturn) and nestedness (βnest). The whole bacterial communities and the abundant and rare subcommunities differed substantially between sediment and water in taxonomical composition, α-diversity, and β-diversity. Sediment had significantly lower α-diversity indexes but higher β-diversity than water. In general, bacterial communities are predominantly governed by strong turnover processes (βturn/βsor ratio of 0.925). Bacterial communities in sediment had a significantly higher βturn/βsor ratio than in water. Abundant subcommunities were significantly lower in the βturn/βsor ratio compared with rare subcommunities. The results suggest that the bacterial communities of thermokarst lakes, especially rare subcommunities or particularly in sediment, might be strongly structured by heterogeneity in the source material, environmental filtering, and geographical isolation, leading to compositionally distinct communities. This integral study increased our current knowledge of thermokarst lakes, enhancing our understanding of the community assembly rules and ecosystem structures and processes of these rapidly changing and vulnerable ecosystems.

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“…Thermokarst lakes, also known as thaw lakes, are formed as a result of thawing ice-rich permafrost, acting as a ubiquitous landscape feature in the cold region with ecological and biogeochemical importance (Kokelj and Jorgenson, 2013;Chin et al, 2016;In'T Zandt et al, 2020;Manasypov et al, 2021). Thermokarst lakes evolve through vertical and horizontal permafrost degradation with the lake areas ranging from a few square meters to hundreds of square kilometers (Grosse et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Bacterial Communities Present Distinct Co-occurrence Networks in Sediment and Water of the Thermokarst Lakes in the Yellow River Source Area

Ren

Cheng

et al. 2021

Front. Microbiol.

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Thermokarst lakes are a ubiquitous and important landscape feature in cold regions and are changing tremendously due to the accelerated climate change. In thermokarst lakes, sediment and water are two distinct but highly interconnected habitats, harboring different bacterial communities in terms of taxonomic composition. However, the co-occurrence networks of these bacterial communities remain unclear. Here, we investigate the co-occurrence ecological networks of sediment and water bacterial communities for thermokarst lakes in the Yellow River Source Area on the Qinghai-Tibet Plateau. The results show that the bacterial communities construct distinct co-occurrence networks in sediment and water. The metacommunity network was parsed into four major modules formed by the operational taxonomic units (OTUs) enriched in sediment or water independently, and water-enriched OTUs exhibited much closer interconnections than sediment-enriched OTUs. When considering the sediment and water bacterial networks separately, different topological properties and modular patterns present: the sediment bacterial network was more clustered while the modules less responded to the environmental variables. On the contrary, the water bacterial network was more complex with the OTUs more interconnected and its modules more responded to the environmental variables. Moreover, the results of the structural equation model suggest that, by the influence of environmental variations on individual modules, the water bacterial communities would be more vulnerable under the fact of accelerating climate change. This study provides insights beyond a conventional taxonomic perspective, adding our knowledge of the potential mechanisms structuring bacterial community assembly and improving our prediction of the responses of this fast-changing ecosystem to future climate change.

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Biogeochemistry of macrophytes, sediments and porewaters in thermokarst lakes of permafrost peatlands, western Siberia

Cited by 24 publications

References 119 publications

Abundant and rare bacterial taxa structuring differently in sediment and water in thermokarst lakes in the Yellow River Source area, Qinghai-Tibet Plateau

Abundant and rare bacterial taxa structuring differently in sediment and water in thermokarst lakes in the Yellow River Source area, Qinghai-Tibet Plateau

Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau

Bacterial Communities Present Distinct Co-occurrence Networks in Sediment and Water of the Thermokarst Lakes in the Yellow River Source Area

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