Interaction between carbon cycling and phytoplankton community succession in hydropower reservoirs: Evidence from stable carbon isotope analysis

Xiao, Jing; Wang, Baoli; Qiu, Xiao‐Long; Yang, Meiling; Liu, Cong‐Qiang

doi:10.1016/j.scitotenv.2021.145141

Cited by 23 publications

(7 citation statements)

References 53 publications

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“…Environmental changes are an important force driving the planktonic microbial species succession ( Zhou et al, 2014 ; Amend et al, 2016 ; García-García et al, 2019 ; Xiao et al, 2021 ). In turn, planktonic bacteria and archaea have different responses to the environmental changes.…”

Section: Discussionmentioning

confidence: 99%

“…Nowadays damming is the most significant anthropogenic disturbance to rivers, and approximately 70% of the world’s rivers have been dammed ( Grill et al, 2019 ), which has greatly changed the ecological environment of rivers. Dams interrupt the river continuum, increase the retention time of water and nutrients, and alter nutrient cycling and biological succession ( Wang B. et al, 2018 ; Wu et al, 2019 ; Maavara et al, 2020 ; Xiao et al, 2021 ). Reservoirs created by damming are influenced by anthropogenic regulation with their own specific ecological characteristics, such as seasonal thermal, chemical, and biological stratifications, and damming effects become a hot ecological issue ( Maavara et al, 2020 ; Wang B. et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

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River damming enhances ecological functional stability of planktonic microorganisms

Wang

Liu

et al. 2022

Front. Microbiol.

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Planktonic microorganisms play an important role in maintaining the ecological functions in aquatic ecosystems, but how their structure and function interrelate and respond to environmental changes is still not very clear. Damming interrupts the river continuum and alters river nutrient biogeochemical cycling and biological succession. Considering that river damming decreases the irregular hydrological fluctuation, we hypothesized that it can enhance the ecological functional stability (EFS) of planktonic microorganisms. Therefore, the community composition of planktonic bacteria and archaea, functional genes related to carbon, nitrogen, sulfur, and phosphorus cycling, and relevant environmental factors of four cascade reservoirs in the Pearl River, Southern China, were investigated to understand the impact of damming on microbial community structure and function and verify the above hypothesis. Here, the ratio of function to taxa (F:T) based on Euclidean distance matrix analysis was first proposed to characterize the microbial EFS; the smaller the ratio, the more stable the ecological functions. The results showed that the reservoirs created by river damming had seasonal thermal and chemical stratifications with an increasing hydraulic retention time, which significantly changed the microbial structure and function. The river microbial F:T was significantly higher than that of the reservoirs, indicating that river damming enhances the EFS of the planktonic microorganisms. Structural equation modeling demonstrated that water temperature was an important factor influencing the relationship between the microbial structure and function and thus affected their EFS. In addition, reservoir hydraulic load was found a main factor regulating the seasonal difference in microbial EFS among the reservoirs. This study will help to deepen the understanding of the relationship between microbial structure and function and provide a theoretical basis of assessing the ecological function change after the construction of river damming.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

River damming enhances ecological functional stability of planktonic microorganisms

Wang

Liu

et al. 2022

Front. Microbiol.

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“…Their surface water samples were collected in September 2020 ( Supplementary Table 2 ). Detailed information about the sites is referred to Xiao et al (2021) and Li et al (2022) .…”

Section: Methodsmentioning

confidence: 99%

“…The carbon density was the ratio of cellular carbon content to cellular volume for the single species in the laboratory or mean carbon content to mean biovolume for the phytoplankton assemblage in the field, whereas the Chl a density was the ratio of Chl a concentration to total biovolume of either single species in the laboratory or phytoplankton assemblage in the field. The other relevant parameters, including water alkalinity (Alk), dissolved inorganic nitrogen (DIN, sum of ammonium nitrogen, nitrate nitrogen, and nitrite nitrogen), phosphate phosphorus (PO 4 3− -P), dissolved silicon (DSi), and particulate organic carbon (POC), were also determined, and the detailed analytical methods were referred to Xiao et al (2021) and Li et al (2022) .…”

Section: Methodsmentioning

confidence: 99%

Phytoplankton cell size control can be affected by photosynthetic light energy utilization

Wang²,

Xiao³

et al. 2022

Front. Microbiol.

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Phytoplankton cell size is well known as an essential functional trait, but its control factors are still unclear. Considering light provides the necessary energy for phytoplankton survival, we hypothesized that photosynthetic light energy utilization could influence phytoplankton cell size control. Several scenarios were conducted to understand the relationship between Fv/Fm and cell size for phytoplankton interspecies, and metatranscriptome in the field and transcriptome in the laboratory were used to understand relevant molecular mechanisms. The results indicated that there was a universal significant positive relationship between Fv/Fm and cell volume in general. The molecular evidence demonstrated that light utilization by phytoplankton regulates their cell size by harmonizing the generation and allocation of chemical energy and fixed carbon in the cell. Phytoplankton cell size would cease to enlarge once the increased light energy conversion and subsequent fixed carbon could no longer satisfy the increasing demand of size enlargement. This unity of energy and matter in shaping phytoplankton size results in cell size being an important functional trait. This study is the first to discover the above molecular mechanisms and is helpful to deepen the understanding on the cell size control of phytoplankton.

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“…In the present study, based on CA and the IDW spatial interpolation analysis approach, we found that phytoplankton taxonomy diversity patterns are closely related to environmental condition changes between the rainy and dry seasons. Previous studies have shown that nutrients in lakes are important factors for phytoplankton communities, as they directly in uence the spatial distribution and community composition (Xiao et al 2021). Recent studies have shown that extreme nutrient input from anthropogenic activities leads to eutrophication and harmful algal blooms in lake ecosystems (Huang et al 2014).…”

Section: Environmental Characteristics and Trophic Statesmentioning

confidence: 99%

Using phytoplankton taxonomy diversity indices to assess trophic states in the biggest quake lake in China

Cai

et al. 2022

Preprint

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Water eutrophication is widely associated with the explosion of phytoplankton productivity and the overdominance of some harmful phytoplankton species. Phytoplankton diversity indices are useful tools for describing trophic states. The relationship between phytoplankton diversity indices and trophic states is a relevant approach to assess water quality, but this approach has rarely been used to evaluate water quality in large quake lakes. To test the usefulness of phytoplankton diversity indices in water quality assessment, we investigated the taxonomy diversity-trophic state index (TSI) relationships for lakes in the second-largest quake lake worldwide, (Jingpo Lake, in China). Our results showed that Cyanophyta and Bacillariophyta were abundant at most stations during the study period. The Bacillariophyta assemblage was closely associated with organic pollution. The Margalef index and Shannon–Weaver index were relevant tools for evaluating trophic changes during the study period. The Pielou index had a weak ability to describe nutrient changes. Our findings highlight that phytoplankton taxonomy diversity indices are relevant tools in water quality assessment, but a selection of the fit index is necessary.

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Interaction between carbon cycling and phytoplankton community succession in hydropower reservoirs: Evidence from stable carbon isotope analysis

Cited by 23 publications

References 53 publications

River damming enhances ecological functional stability of planktonic microorganisms

River damming enhances ecological functional stability of planktonic microorganisms

Phytoplankton cell size control can be affected by photosynthetic light energy utilization

Using phytoplankton taxonomy diversity indices to assess trophic states in the biggest quake lake in China

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