Ecological damage of submerged macrophytes by fresh cyanobacteria (FC) and cyanobacterial decomposition solution (CDS)

Zhang, Weizhen; Gu, Ping; Zheng, Xiaowei; Wang, Ning; Wu, Hanqi; He, Jianguo; Luo, Xiaofeng; Zhou, Liang; Zhang, Zheng

doi:10.1016/j.jhazmat.2020.123372

Cited by 23 publications

(4 citation statements)

References 51 publications

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“…The coefficient of variation of Cl – in surface water (252.5%) and K + in groundwater is the largest (221.7%). Mg 2+ and SO 4 2– ions are relatively stable conserved ions, which are less affected by the water–rock interaction, and can better trace the influence of exogenous inputs such as upstream grazing and tourist activities on groundwater hydrochemistry . In this study, the variation coefficient of the overall detection results of the water is relatively large, indicating that the evolution is complex.…”

Section: Resultsmentioning

confidence: 78%

Water Environmental Characteristics and Eutrophication Evaluation of Alpine Karst Mountains in Huanglong, Sichuan, China

Gao

Zhang

Sun³

et al. 2023

ACS Earth Space Chem.

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Travertine deposits are formed after CO2 is degassed from deep karst water at the Huanglong Scenic Area, a World Natural Heritage Site. In recent years, various levels of eutrophication have occurred in travertine waters, resulting in large areas of algal mats that have severely affected the continued deposition of travertine and its appreciable value. The research on hydrochemical types, hydrochemical components, and pollution characteristics of surface water and groundwater in Huanglong National Scenic Area, a World Natural Heritage, is beneficial to the evaluation and management of regional water resources and landscape development. In June 2022, 14 groups of surface water and groundwater samples were collected from Huanglong. Mathematical statistics were used to analyze the water’s chemical characteristics, the Piper three-plot was used to analyze the water’s chemical types, and Gibbs and Gaillardet model were used to discuss the sources and influencing factors of main ions in surface water. The eutrophication degree of regional water was evaluated by the single factor index method. The results show that most of the groundwater in the study area belongs to weakly alkaline water. The cations are mainly Ca2+, the anions are mainly HCO3 –, and the hydrochemical type is HCO3–Ca. The major contribution of TDS comes from Ca2+ and HCO3 –. According to the analysis of water–rock model, the hydrochemical origin of surface water in the study area is mainly controlled by rock weathering, and most ions are influenced by the water–rock interaction of carbonate rocks, with the existence of reverse cation exchange. The spatial and temporal distribution characteristics of nitrogen, phosphorus, and carbon are obvious. Eutrophication evaluation showed that Huanglong was in a medium eutrophication state.

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Section: Resultsmentioning

confidence: 78%

Water Environmental Characteristics and Eutrophication Evaluation of Alpine Karst Mountains in Huanglong, Sichuan, China

Gao

Zhang

Sun³

et al. 2023

ACS Earth Space Chem.

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“…In Lake Müggelsee in Germany, cyanobacterial blooms resulted in the reduction of aquatic plants for approximately 90% (Körner, 2001 ). When submerged plants were exposed to cyanobacterial exudates and extracts, their growth was impacted by increasing ROS levels and declining photosynthetic properties (Zheng et al, 2013 ; Zhang et al, 2021 ). Recently, the allelopathic effects of β-cyclocitral and β-ionone on duckweed ( Lemna turionifera ) were detected.…”

Section: Functions Of Vocs In Cyanobacterial Bloomsmentioning

confidence: 99%

Emission of cyanobacterial volatile organic compounds and their roles in blooms

Zuo

2023

Front. Microbiol.

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Cyanobacteria are photosynthetic prokaryotes and one of dominant species in eutrophicated waters, which easily burst blooms in summer with high irradiance and temperature conditions. In response to high irradiance, high temperature, and nutrient conditions, cyanobacteria release abundant of volatile organic compounds (VOCs) by up-regulating related gene expression and oxidatively degrading β-carotene. These VOCs not only increase offensive odor in waters, but also transfer allelopathic signals to algae and aquatic plants, resulting in cyanobacteria dominating eutrophicated waters. Among these VOCs, β-cyclocitral, α-ionone, β-ionone, limonene, longifolene, and eucalyptol have been identified as the main allelopathic agents, which even directly kill algae by inducing programmed cell death (PCD). The VOCs released from cyanobacteria, especially the ruptured cells, exhibit repelling effects on the herbivores, which is beneficial to survival of the population. Cyanobacterial VOCs might transfer aggregating information among homogeneous species, so the acceptors initiate aggregation to resist the coming stresses. It can be speculated that the adverse conditions can promote VOC emission from cyanobacteria, which play important roles in cyanobacteria dominating eutrophicated waters and even bursting blooms.

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“…However, as a result of global warming and eutrophication, lake ecosystems around the world are suffering from harmful cyanobacterial blooms, with severe consequences including altered ecosystem function and deteriorating water quality (Huisman et al, 2018;Yang et al, 2022;Zhang, Gu, et al, 2021). Cyanobacteria are poor-quality food for zooplankton as a consequence of the production of toxic secondary metabolites, their morphological properties, and a lack of essential lipids (Hegg et al, 2022;Martin-Creuzburg et al, 2008;Wilson et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…In freshwater lake ecosystems, cladoceran zooplankton modify their phenotypic traits related to morphology, life history and behaviour as adaptive responses to predation risk (Gu, Xu, Li, et al, 2021; Langer et al, 2019; Octorina et al, 2022; Weider & Pijanowska, 1993). However, as a result of global warming and eutrophication, lake ecosystems around the world are suffering from harmful cyanobacterial blooms, with severe consequences including altered ecosystem function and deteriorating water quality (Huisman et al, 2018; Yang et al, 2022; Zhang, Gu, et al, 2021). Cyanobacteria are poor‐quality food for zooplankton as a consequence of the production of toxic secondary metabolites, their morphological properties, and a lack of essential lipids (Hegg et al, 2022; Martin‐Creuzburg et al, 2008; Wilson et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Transcriptome analysis reveals the molecular basis of anti‐predation defence in Daphnia pulex simultaneously responding to Microcystis aeruginosa

et al. 2023

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1. The influence of cyanobacteria on interspecies interactions has received growing attention as a predictor of aquatic ecosystem function. It is well‐known that cyanobacteria greatly affect predator‐induced phenotypic plasticity in planktonic animals. However, the underlying molecular mechanism remains unclear. 2. Here, we used Daphnia pulex as a model organism for inducible defence, examining its morphological and life‐history responses to fish kairomone while feeding on 100% Chlorella pyrenoides, or while feeding on 70% Chlorella and either microcystin‐producing or ‐free Microcystis aeruginosa, separately. Transcriptome profiles of kairomone‐exposed D. pulex fed different types of food were detected using RNA‐seq. How the differentially expressed genes and pathways identified are responsible for the altered adaptive traits under Microcystis stress was discussed. 3. Daphnia pulex fed 100% Chlorella matured at a smaller body size, elongated tail spine length, and produced smaller offspring as adaptive morphological and reproductive responses to fish kairomone. These anti‐predation defences entailed a cost in decreased somatic growth rate. Microcystis stress caused defence trade‐offs in both morphology and reproduction: reduction of body size at maturity was stronger whereas tail spine elongation was unchanged or inhibited. Given that reproductive investment was reduced overall in Daphnia exposed to fish kairomones, there was a trade‐off for unchanged offspring size by reducing offspring number in Daphnia fed Microcystis. Defence‐induced costs to growth were increased by Microcystis exposure. 4. Transcriptome analysis revealed that neuronal signals including acetylcholine and glutamate signalling implicated in kairomone reception and/or transmission exhibited stronger responses under Microcystis stress. Cuticle development associated with the biosynthesis of wax esters and chitin, modification of lipo‐chitin saccharides, and the stability of collagen triple helix apparently participated in the morphological changes. The arachidonic acid pathway and biosynthesis of cholesterol and steroid hormones mediated altered reproductive performance. In addition, metabolic processes such as detoxification, food assimilation, lysosome dysfunction and apoptosis activation were involved in the survival and growth of Daphnia, which may contribute to the increased defence‐induced cost in growth when fed Microcystis. 5. Taken together, these findings advance our understanding of the molecular mechanisms underlying anti‐predation defensive responses by Daphnia to cyanobacterial stress. This work also provides a reference for further exploring the functional genes that mediate zooplankton–fish coevolution dynamics under eutrophic conditions.

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Ecological damage of submerged macrophytes by fresh cyanobacteria (FC) and cyanobacterial decomposition solution (CDS)

Cited by 23 publications

References 51 publications

Water Environmental Characteristics and Eutrophication Evaluation of Alpine Karst Mountains in Huanglong, Sichuan, China

Water Environmental Characteristics and Eutrophication Evaluation of Alpine Karst Mountains in Huanglong, Sichuan, China

Emission of cyanobacterial volatile organic compounds and their roles in blooms

Transcriptome analysis reveals the molecular basis of anti‐predation defence in Daphnia pulex simultaneously responding to Microcystis aeruginosa

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