{"title":"The increasing of the infectivity of cyanophages at higher representative concentration pathway scenarios","authors":"Shang Shiyu, Cheng Kai","doi":"10.18307/2023.0415","DOIUrl":"https://doi.org/10.18307/2023.0415","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67485794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Biodiversity of aquatic invertebrates based on environmental DNA metabarcoding technology: A case study of Lake Haizhu in Guangzhou","authors":"Tang Shiqin, W. Qing, Liu Lu, Yang Yufeng","doi":"10.18307/2023.0437","DOIUrl":"https://doi.org/10.18307/2023.0437","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67487039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
You Bensheng, Ma Shuzhan, Geng Mengdie, Chen Dongqiang, Cao Qing, Wang Jianjun, Gu Luhua
水体和沉积物是湖泊生态系统中迥异但又紧密相连的两类生境,栖息在这两类生境中的细菌在维持生态系统平衡和驱动元素循环中起着关键性作用。为了探究湖泊水体和沉积物细菌群落的分布格局,本文对太湖四个湖区水体和沉积物中细菌群落进行调查,基于高通量测序技术和统计分析手段,分析这两类生境中的细菌群落组成和多样性水平、分布特征及其驱动因素。结果表明:放线菌门(Actinobacteria)、变形菌门(Proteobacteria)和蓝细菌门(Cyanobacteria)是水体细菌群落中最主要的细菌门,而沉积物中Proteobacteria占据优势地位。在两类生境中,太湖西部区域细菌群落丰富度和独特性(LCBD)相对较高,各区域群落结构表现出显著性差异。对水体而言,电导率、pH值、PC1(重金属组成)和沉积物孔隙度是驱动细菌丰富度的重要因子,PC1、水温及pH值是影响细菌群落LCBD的重要因子,而细菌网络复杂性随pH值的增加而增加,且在高pH环境中占主导地位;对沉积物而言,其丰富度和LCBD的重要影响因子均是沉积物中总磷和锂,细菌网络复杂性随金属元素施加的环境压力增大而降低,但随总磷、磷酸盐和铵态氮浓度的增加而增加。本文揭示了太湖水体和沉积物细菌群落是由不同的环境因素所驱动,为太湖水生态保护和水资源管理提供了新的视角。;Water and sediment are two different but closely related habitats in the lake ecosystem, and the bacteria inhabiting these two habitats play a key role in maintaining the ecosystem balance and driving elemental cycling. To investigate the distribution patterns of bacterial communities in lake water and sediment, this paper investigated the bacterial communities in water and sediment in four regions of Lake Taihu, and analysed the bacterial community composition and diversity levels, distribution characteristics and their drivers in these two types of habitats based on high-throughput sequencing technology and statistical analysis. The results showed that Actinobacteria, Proteobacteria and Cyanobacteria were the main bacteria in the surface water bacterial community, while Proteobacteria dominated in the surface sediment. In the two habitats, bacterial richness and local contribution to beta diversity (LCBD) were relatively higher in the western region of Lake Taihu, and the community structure showed significant regional differences. For surface water bacterial communities, the important factors influencing community richness were water conductivity, pH, sediment porosity and PC1 (principal component of heavy metal elements), while the important factors influencing community uniqueness were PC1, water temperature and pH. In addition, network complexity increased significantly with increasing pH. For surface sediment bacterial communities, total phosphorus and lithium were the most important factors influencing community richness and community uniqueness. Furthermore, network complexity decreased with increasing metallic element content, whereas it increased with increasing total phosphorus, ammonium and phosphate concentrations in the sediment. These results showed that the bacterial communities in the water and sediment were driven by different environmental factors, providing a new perspective for aquatic ecosystem conservation and water resource management in Lake Taihu.
水体和沉积物是湖泊生态系统中迥异但又紧密相连的两类生境,栖息在这两类生境中的细菌在维持生态系统平衡和驱动元素循环中起着关键性作用。为了探究湖泊水体和沉积物细菌群落的分布格局,本文对太湖四个湖区水体和沉积物中细菌群落进行调查,基于高通量测序技术和统计分析手段,分析这两类生境中的细菌群落组成和多样性水平、分布特征及其驱动因素。结果表明:放线菌门(Actinobacteria)、变形菌门(Proteobacteria)和蓝细菌门(Cyanobacteria)是水体细菌群落中最主要的细菌门,而沉积物中Proteobacteria占据优势地位。在两类生境中,太湖西部区域细菌群落丰富度和独特性(LCBD)相对较高,各区域群落结构表现出显著性差异。对水体而言,电导率、pH值、PC1(重金属组成)和沉积物孔隙度是驱动细菌丰富度的重要因子,PC1、水温及pH值是影响细菌群落LCBD的重要因子,而细菌网络复杂性随pH值的增加而增加,且在高pH环境中占主导地位;对沉积物而言,其丰富度和LCBD的重要影响因子均是沉积物中总磷和锂,细菌网络复杂性随金属元素施加的环境压力增大而降低,但随总磷、磷酸盐和铵态氮浓度的增加而增加。本文揭示了太湖水体和沉积物细菌群落是由不同的环境因素所驱动,为太湖水生态保护和水资源管理提供了新的视角。;Water and sediment are two different but closely related habitats in the lake ecosystem, and the bacteria inhabiting these two habitats play a key role in maintaining the ecosystem balance and driving elemental cycling. To investigate the distribution patterns of bacterial communities in lake water and sediment, this paper investigated the bacterial communities in water and sediment in four regions of Lake Taihu, and analysed the bacterial community composition and diversity levels, distribution characteristics and their drivers in these two types of habitats based on high-throughput sequencing technology and statistical analysis. The results showed that Actinobacteria, Proteobacteria and Cyanobacteria were the main bacteria in the surface water bacterial community, while Proteobacteria dominated in the surface sediment. In the two habitats, bacterial richness and local contribution to beta diversity (LCBD) were relatively higher in the western region of Lake Taihu, and the community structure showed significant regional differences. For surface water bacterial communities, the important factors influencing community richness were water conductivity, pH, sediment porosity and PC1 (principal component of heavy metal elements), while the important factors influencing community uniqueness were PC1, water temperature and pH. In addition, network complexity increased significantly with increasing pH. For surface sediment bacterial communities, total phosphorus and lithium were the most important factors influencing community richness and community uniqueness. Furthermore, network complexity decreased with increasing metallic element content, whereas it increased with increasing total phosphorus, ammonium and phosphate concentrations in the sediment. These results showed that the bacterial communities in the water and sediment were driven by different environmental factors, providing a new perspective for aquatic ecosystem conservation and water resource management in Lake Taihu.
{"title":"Distribution patterns and driving factors of bacterial communities in water and sediment of Lake Taihu","authors":"You Bensheng, Ma Shuzhan, Geng Mengdie, Chen Dongqiang, Cao Qing, Wang Jianjun, Gu Luhua","doi":"10.18307/2023.0536","DOIUrl":"https://doi.org/10.18307/2023.0536","url":null,"abstract":"水体和沉积物是湖泊生态系统中迥异但又紧密相连的两类生境,栖息在这两类生境中的细菌在维持生态系统平衡和驱动元素循环中起着关键性作用。为了探究湖泊水体和沉积物细菌群落的分布格局,本文对太湖四个湖区水体和沉积物中细菌群落进行调查,基于高通量测序技术和统计分析手段,分析这两类生境中的细菌群落组成和多样性水平、分布特征及其驱动因素。结果表明:放线菌门(Actinobacteria)、变形菌门(Proteobacteria)和蓝细菌门(Cyanobacteria)是水体细菌群落中最主要的细菌门,而沉积物中Proteobacteria占据优势地位。在两类生境中,太湖西部区域细菌群落丰富度和独特性(LCBD)相对较高,各区域群落结构表现出显著性差异。对水体而言,电导率、pH值、PC1(重金属组成)和沉积物孔隙度是驱动细菌丰富度的重要因子,PC1、水温及pH值是影响细菌群落LCBD的重要因子,而细菌网络复杂性随pH值的增加而增加,且在高pH环境中占主导地位;对沉积物而言,其丰富度和LCBD的重要影响因子均是沉积物中总磷和锂,细菌网络复杂性随金属元素施加的环境压力增大而降低,但随总磷、磷酸盐和铵态氮浓度的增加而增加。本文揭示了太湖水体和沉积物细菌群落是由不同的环境因素所驱动,为太湖水生态保护和水资源管理提供了新的视角。;Water and sediment are two different but closely related habitats in the lake ecosystem, and the bacteria inhabiting these two habitats play a key role in maintaining the ecosystem balance and driving elemental cycling. To investigate the distribution patterns of bacterial communities in lake water and sediment, this paper investigated the bacterial communities in water and sediment in four regions of Lake Taihu, and analysed the bacterial community composition and diversity levels, distribution characteristics and their drivers in these two types of habitats based on high-throughput sequencing technology and statistical analysis. The results showed that Actinobacteria, Proteobacteria and Cyanobacteria were the main bacteria in the surface water bacterial community, while Proteobacteria dominated in the surface sediment. In the two habitats, bacterial richness and local contribution to beta diversity (LCBD) were relatively higher in the western region of Lake Taihu, and the community structure showed significant regional differences. For surface water bacterial communities, the important factors influencing community richness were water conductivity, pH, sediment porosity and PC1 (principal component of heavy metal elements), while the important factors influencing community uniqueness were PC1, water temperature and pH. In addition, network complexity increased significantly with increasing pH. For surface sediment bacterial communities, total phosphorus and lithium were the most important factors influencing community richness and community uniqueness. Furthermore, network complexity decreased with increasing metallic element content, whereas it increased with increasing total phosphorus, ammonium and phosphate concentrations in the sediment. These results showed that the bacterial communities in the water and sediment were driven by different environmental factors, providing a new perspective for aquatic ecosystem conservation and water resource management in Lake Taihu.","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135357294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Guo Jingiing, Cai Guojun, Chen Yaoqi, Wu Zhouhang, Hou Xiaoli, Ge Yili, Fu Hui
{"title":"Effects of sediment type and species abundance on modularization growth and root development of submerged macrophytes","authors":"Guo Jingiing, Cai Guojun, Chen Yaoqi, Wu Zhouhang, Hou Xiaoli, Ge Yili, Fu Hui","doi":"10.18307/2023.0515","DOIUrl":"https://doi.org/10.18307/2023.0515","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135357550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wen Feng, Ma Yuxing, Liang Zhice, Liao Chuansong, Pan Jiayong, Shao Jianqiang, He Guangxi, Liu Jiashou, Guo Chuanbo
千岛湖(新安江水库)是我国大水面生态渔业发展的典型湖库,其渔业主要以鲢、鳙等滤食性鱼类增殖为主,对鱼食性鱼类资源的研究和关注相对匮乏。而鱼食性鱼类是水生食物网的顶级捕食者,对维持水生态系统结构和功能具有重要作用。近年来,受过度捕捞、生境退化等影响,千岛湖鱼食性鱼类资源下降明显。鉴于此,2021年3月-2022年12月,逐月在千岛湖收集4种同域共存的鱼食性鱼类样品1032尾,包括翘嘴鲌(Culter alburnus)、蒙古鲌(Culter mongolicus)、大眼鳜(Siniperca knerii)和斑鳜(Siniperca scherzeri),系统研究并比较了4种鱼食性鱼类年龄、生长、繁殖等生活史策略的分化特征。结果表明,千岛湖4种鱼食性鱼类优势年龄组均未超过3龄,说明其种群呈现低龄化现象。生长式型上,翘嘴鲌和蒙古鲌属正异速生长,而大眼鳜和斑鳜属负异速生长,说明4种鱼食性鱼类具有不同的生长策略。条件系数(CF)的变化趋势与繁殖活动密切相关,其中大眼鳜的条件系数最高(1.92%±0.03%),其次为斑鳜(1.72%±0.02%)和蒙古鲌(1.14%±0.01%),翘嘴鲌的条件系数最低(0.97%±0.03%)。繁殖时间上,斑鳜最早进入繁殖期(3月),其次为大眼鳜(4月)、蒙古鲌(5月),翘嘴鲌最晚(6月)。大眼鳜和斑鳜均出现了2次繁殖高峰(5月和7月),翘嘴鲌的繁殖高峰相对持久(6-7月),蒙古鲌繁殖高峰则最为集中(7月)。繁殖力上,翘嘴鲌((254±16)粒/g)和蒙古鲌((192±10)粒/g)的相对繁殖力较高,显著高于大眼鳜((88±19)粒/g)和斑鳜((88±10)粒/g)。翘嘴鲌和蒙古鲌卵径为单峰分布,推测为单批次产卵类型;而大眼鳜和斑鳜卵径为双峰分布,推测为多批次产卵类型。综上,千岛湖4种鱼食性鱼类在生长速率、生长式型、条件系数等生长策略以及性比、繁殖力、繁殖时间、繁殖方式等繁殖策略均出现了分化,支撑其实现了同域共存。研究结果对进一步理解鱼类同域共存机制,保护、恢复和科学利用千岛湖鱼食性鱼类资源,优化和完善鱼类群落结构具有重要意义。;As one of the most famous reservoirs with an ecological aquaculture paradigm in China, Lake Qiandaohu(Xin'anjiang Reservoir) has been focused mainly on the stocking of filter-feeding carps such as silver carp and bighead carp while there is still a large information gap on the important piscivorous fish species. In recent years, due to the impacts such as overfishing and habitat fragmentation, piscivorous fish resources declined significantly. However, piscivorous fish are the top predators of aquatic food webs and play an important role in maintaining the structure and function of aquatic ecosystems. Therefore, in this study, we focused on four dominant piscivorous fish species in Lake Qiandaohu: Culter alburnus, Culter mongolicus, Siniperca knerii and Siniperca scherzeri. From March 2021 to December 2022, we collected fish samples monthly in Lake Qiandaohu and the differentiation characteristics of the life history strategies in terms of age, growth, and reproduction were systematically compared. The results indicated that 2-3 years age was the dominant group for all the four populations, and the proportion of senior individuals was relatively low. In terms of the growth patterns, C. alburnus and C. mongolicus belonged to the positive allometric growth pattern, while S. knerii and S. scherzeri showed negative allometric growth, indicated that Culter and Siniperca in Lake Qiandaohu had different growth patterns. It showed that the four piscivorous fishes had different growth strategies. The condition factor was closely related to reproductive activities. And the condition factor for S. knerii was the highest (1.92%±0.03%), followed by S. scherzeri (1.72%±0.02%), C. mongolicus (1.14%±0.01%), while C. alburnus was the lowest (0.97%±0.03%). The difference in condition factor suggested that they might utilize different food resources. The reproductive strategies of the four piscivorous fish species also varied. In terms of the breeding period, the S. knerii and S. scherzeri were relative longer compared to the C. alburnus and C. mongolicus. Regarding fecundity, the relative
千岛湖(新安江水库)是我国大水面生态渔业发展的典型湖库,其渔业主要以鲢、鳙等滤食性鱼类增殖为主,对鱼食性鱼类资源的研究和关注相对匮乏。而鱼食性鱼类是水生食物网的顶级捕食者,对维持水生态系统结构和功能具有重要作用。近年来,受过度捕捞、生境退化等影响,千岛湖鱼食性鱼类资源下降明显。鉴于此,2021年3月-2022年12月,逐月在千岛湖收集4种同域共存的鱼食性鱼类样品1032尾,包括翘嘴鲌(Culter alburnus)、蒙古鲌(Culter mongolicus)、大眼鳜(Siniperca knerii)和斑鳜(Siniperca scherzeri),系统研究并比较了4种鱼食性鱼类年龄、生长、繁殖等生活史策略的分化特征。结果表明,千岛湖4种鱼食性鱼类优势年龄组均未超过3龄,说明其种群呈现低龄化现象。生长式型上,翘嘴鲌和蒙古鲌属正异速生长,而大眼鳜和斑鳜属负异速生长,说明4种鱼食性鱼类具有不同的生长策略。条件系数(CF)的变化趋势与繁殖活动密切相关,其中大眼鳜的条件系数最高(1.92%±0.03%),其次为斑鳜(1.72%±0.02%)和蒙古鲌(1.14%±0.01%),翘嘴鲌的条件系数最低(0.97%±0.03%)。繁殖时间上,斑鳜最早进入繁殖期(3月),其次为大眼鳜(4月)、蒙古鲌(5月),翘嘴鲌最晚(6月)。大眼鳜和斑鳜均出现了2次繁殖高峰(5月和7月),翘嘴鲌的繁殖高峰相对持久(6-7月),蒙古鲌繁殖高峰则最为集中(7月)。繁殖力上,翘嘴鲌((254±16)粒/g)和蒙古鲌((192±10)粒/g)的相对繁殖力较高,显著高于大眼鳜((88±19)粒/g)和斑鳜((88±10)粒/g)。翘嘴鲌和蒙古鲌卵径为单峰分布,推测为单批次产卵类型;而大眼鳜和斑鳜卵径为双峰分布,推测为多批次产卵类型。综上,千岛湖4种鱼食性鱼类在生长速率、生长式型、条件系数等生长策略以及性比、繁殖力、繁殖时间、繁殖方式等繁殖策略均出现了分化,支撑其实现了同域共存。研究结果对进一步理解鱼类同域共存机制,保护、恢复和科学利用千岛湖鱼食性鱼类资源,优化和完善鱼类群落结构具有重要意义。;As one of the most famous reservoirs with an ecological aquaculture paradigm in China, Lake Qiandaohu(Xin'anjiang Reservoir) has been focused mainly on the stocking of filter-feeding carps such as silver carp and bighead carp while there is still a large information gap on the important piscivorous fish species. In recent years, due to the impacts such as overfishing and habitat fragmentation, piscivorous fish resources declined significantly. However, piscivorous fish are the top predators of aquatic food webs and play an important role in maintaining the structure and function of aquatic ecosystems. Therefore, in this study, we focused on four dominant piscivorous fish species in Lake Qiandaohu: Culter alburnus, Culter mongolicus, Siniperca knerii and Siniperca scherzeri. From March 2021 to December 2022, we collected fish samples monthly in Lake Qiandaohu and the differentiation characteristics of the life history strategies in terms of age, growth, and reproduction were systematically compared. The results indicated that 2-3 years age was the dominant group for all the four populations, and the proportion of senior individuals was relatively low. In terms of the growth patterns, C. alburnus and C. mongolicus belonged to the positive allometric growth pattern, while S. knerii and S. scherzeri showed negative allometric growth, indicated that Culter and Siniperca in Lake Qiandaohu had different growth patterns. It showed that the four piscivorous fishes had different growth strategies. The condition factor was closely related to reproductive activities. And the condition factor for S. knerii was the highest (1.92%±0.03%), followed by S. scherzeri (1.72%±0.02%), C. mongolicus (1.14%±0.01%), while C. alburnus was the lowest (0.97%±0.03%). The difference in condition factor suggested that they might utilize different food resources. The reproductive strategies of the four piscivorous fish species also varied. In terms of the breeding period, the S. knerii and S. scherzeri were relative longer compared to the C. alburnus and C. mongolicus. Regarding fecundity, the relative
{"title":"Comparative study on the life-history strategies of four coexisting piscivorous fish populations in Lake Qiandaohu(Xin'anjiang Reservoir)","authors":"Wen Feng, Ma Yuxing, Liang Zhice, Liao Chuansong, Pan Jiayong, Shao Jianqiang, He Guangxi, Liu Jiashou, Guo Chuanbo","doi":"10.18307/2023.050","DOIUrl":"https://doi.org/10.18307/2023.050","url":null,"abstract":"千岛湖(新安江水库)是我国大水面生态渔业发展的典型湖库,其渔业主要以鲢、鳙等滤食性鱼类增殖为主,对鱼食性鱼类资源的研究和关注相对匮乏。而鱼食性鱼类是水生食物网的顶级捕食者,对维持水生态系统结构和功能具有重要作用。近年来,受过度捕捞、生境退化等影响,千岛湖鱼食性鱼类资源下降明显。鉴于此,2021年3月-2022年12月,逐月在千岛湖收集4种同域共存的鱼食性鱼类样品1032尾,包括翘嘴鲌(Culter alburnus)、蒙古鲌(Culter mongolicus)、大眼鳜(Siniperca knerii)和斑鳜(Siniperca scherzeri),系统研究并比较了4种鱼食性鱼类年龄、生长、繁殖等生活史策略的分化特征。结果表明,千岛湖4种鱼食性鱼类优势年龄组均未超过3龄,说明其种群呈现低龄化现象。生长式型上,翘嘴鲌和蒙古鲌属正异速生长,而大眼鳜和斑鳜属负异速生长,说明4种鱼食性鱼类具有不同的生长策略。条件系数(CF)的变化趋势与繁殖活动密切相关,其中大眼鳜的条件系数最高(1.92%±0.03%),其次为斑鳜(1.72%±0.02%)和蒙古鲌(1.14%±0.01%),翘嘴鲌的条件系数最低(0.97%±0.03%)。繁殖时间上,斑鳜最早进入繁殖期(3月),其次为大眼鳜(4月)、蒙古鲌(5月),翘嘴鲌最晚(6月)。大眼鳜和斑鳜均出现了2次繁殖高峰(5月和7月),翘嘴鲌的繁殖高峰相对持久(6-7月),蒙古鲌繁殖高峰则最为集中(7月)。繁殖力上,翘嘴鲌((254±16)粒/g)和蒙古鲌((192±10)粒/g)的相对繁殖力较高,显著高于大眼鳜((88±19)粒/g)和斑鳜((88±10)粒/g)。翘嘴鲌和蒙古鲌卵径为单峰分布,推测为单批次产卵类型;而大眼鳜和斑鳜卵径为双峰分布,推测为多批次产卵类型。综上,千岛湖4种鱼食性鱼类在生长速率、生长式型、条件系数等生长策略以及性比、繁殖力、繁殖时间、繁殖方式等繁殖策略均出现了分化,支撑其实现了同域共存。研究结果对进一步理解鱼类同域共存机制,保护、恢复和科学利用千岛湖鱼食性鱼类资源,优化和完善鱼类群落结构具有重要意义。;As one of the most famous reservoirs with an ecological aquaculture paradigm in China, Lake Qiandaohu(Xin'anjiang Reservoir) has been focused mainly on the stocking of filter-feeding carps such as silver carp and bighead carp while there is still a large information gap on the important piscivorous fish species. In recent years, due to the impacts such as overfishing and habitat fragmentation, piscivorous fish resources declined significantly. However, piscivorous fish are the top predators of aquatic food webs and play an important role in maintaining the structure and function of aquatic ecosystems. Therefore, in this study, we focused on four dominant piscivorous fish species in Lake Qiandaohu: Culter alburnus, Culter mongolicus, Siniperca knerii and Siniperca scherzeri. From March 2021 to December 2022, we collected fish samples monthly in Lake Qiandaohu and the differentiation characteristics of the life history strategies in terms of age, growth, and reproduction were systematically compared. The results indicated that 2-3 years age was the dominant group for all the four populations, and the proportion of senior individuals was relatively low. In terms of the growth patterns, C. alburnus and C. mongolicus belonged to the positive allometric growth pattern, while S. knerii and S. scherzeri showed negative allometric growth, indicated that Culter and Siniperca in Lake Qiandaohu had different growth patterns. It showed that the four piscivorous fishes had different growth strategies. The condition factor was closely related to reproductive activities. And the condition factor for S. knerii was the highest (1.92%±0.03%), followed by S. scherzeri (1.72%±0.02%), C. mongolicus (1.14%±0.01%), while C. alburnus was the lowest (0.97%±0.03%). The difference in condition factor suggested that they might utilize different food resources. The reproductive strategies of the four piscivorous fish species also varied. In terms of the breeding period, the S. knerii and S. scherzeri were relative longer compared to the C. alburnus and C. mongolicus. Regarding fecundity, the relative","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Du Yuxin, Zheng Baohai, Li Jiaxin, Li Yuxin, Huang Licheng, Shi Junqiong, Wu Zhongxing
由于具有高效的CO2-浓缩机制,蓝藻在低CO2浓度条件下具有竞争优势。然而,随着大气中CO2浓度急剧增加,蓝藻CO2-浓缩机制如何响应的研究较少。因此,本文以常见水华蓝藻——微囊藻为研究对象,通过对滇池微囊藻水华动态及不同CO2-浓缩机制基因型进行监测,探讨蓝藻CO2-浓缩机制基因的微进化特征及其动态变化。同时,设置高(0.08%)、中(0.04%)、低(0.02%)CO2浓度(V/V)进一步揭示微囊藻不同CO2-浓缩机制基因微进化对CO2的竞争效应。结果表明:滇池无机碳浓度在4个采样点存在空间差异性,均呈现先降低后升高的趋势,并以HCO-3为主要无机碳存在形式。调查期间,东大河、观音山、洛龙河和生态所4个采样点的微囊藻均以sbtA基因型占绝对优势,相对丰度远高于bicA基因型。在不同水华时期,bicA基因型和sbtA基因型呈现相反的变化趋势,即从水华前期到水华中期,sbtA基因型的相对丰度逐渐升高,而到水华后期,出现bicA基因型增多的现象。室内竞争实验同样表明高浓度CO2培养环境下,bicA基因型具有明显竞争优势,随CO2浓度的降低,呈现bicA基因型向sbtA基因型转变的趋势。这些结果表明水华中期无机碳浓度相对较低,能适应碳限制环境的sbtA基因型的微囊藻表现出竞争优势,而对CO2浓度变化敏感的bicA基因型的微囊藻随无机碳浓度的升高逐渐增多;同时,在总碱度,pH和Chl.a影响下,微囊藻基因型在滇池不同微囊藻水华期呈现bicA→sbtA→bicA转变。这些结果说明微囊藻能通过调节不同CO2-浓缩机制基因藻株响应水体无机碳浓度,保持种群竞争优势,并维持水华的形成。;The highly efficient CO2 concentration mechanism (CCM) gives cyanobacteria a competitive advantage under low CO2 conditions. However, with the rapid increase in atmospheric CO2 concentration, little information has been presented on how the CO2 concentration mechanism of cyanobacteria responds. Therefore, this study takes a common blooming cyanobacterium, Microcystis, to investigate in the present by monitoring the dynamic changes and different CCM genotypes of Microcystis in Lake Dianchi. At the same time, the microevolutionary characteristics and dynamic changes of CCM genotypes in Microcystis were also discussed. Furthermore, the competing effects of different CCM genotypes in Microcystis at high (0.08%), medium (0.04%) and low (0.02%) CO2 concentrations (V/V) were compared. The results showed that the concentration of inorganic carbon (IC) in Lake Dianchi was spatially variable at four sampling sites, but all sites showed a trend of first decreasing and then increasing IC concentrations, and HCO-3 was the major form of IC. At the four sampling sites of DDH, GYS, LLH and STS, the sbtA genotype Microcystis was dominant and its relative abundance was much higher than that of the bicA genotype Microcystis. In different bloom periods, the bicA and sbtA genotypes of Microcystis showed opposite trends, i.e. the relative abundance of the sbtA genotype Microcystis gradually increased from early to mid- bloom, while the bicA genotype Microcystis increased only in late bloom. The competition experiments showed that the bicA genotype had an apparent competitive advantage in a high CO2 environment and showed a trend of transition from the bicA genotype to the sbtA genotype with decreasing CO2 concentration. These indicate that the IC concentration was relatively low in the middle of the bloom period, resulting in the sbtA genotype showing a competitive advantage in a carbon-limited environment, while the bicA genotype, a sensitive type to changing CO2 concentration, gradually increased with increasing
由于具有高效的CO2-浓缩机制,蓝藻在低CO2浓度条件下具有竞争优势。然而,随着大气中CO2浓度急剧增加,蓝藻CO2-浓缩机制如何响应的研究较少。因此,本文以常见水华蓝藻——微囊藻为研究对象,通过对滇池微囊藻水华动态及不同CO2-浓缩机制基因型进行监测,探讨蓝藻CO2-浓缩机制基因的微进化特征及其动态变化。同时,设置高(0.08%)、中(0.04%)、低(0.02%)CO2浓度(V/V)进一步揭示微囊藻不同CO2-浓缩机制基因微进化对CO2的竞争效应。结果表明:滇池无机碳浓度在4个采样点存在空间差异性,均呈现先降低后升高的趋势,并以HCO-3为主要无机碳存在形式。调查期间,东大河、观音山、洛龙河和生态所4个采样点的微囊藻均以sbtA基因型占绝对优势,相对丰度远高于bicA基因型。在不同水华时期,bicA基因型和sbtA基因型呈现相反的变化趋势,即从水华前期到水华中期,sbtA基因型的相对丰度逐渐升高,而到水华后期,出现bicA基因型增多的现象。室内竞争实验同样表明高浓度CO2培养环境下,bicA基因型具有明显竞争优势,随CO2浓度的降低,呈现bicA基因型向sbtA基因型转变的趋势。这些结果表明水华中期无机碳浓度相对较低,能适应碳限制环境的sbtA基因型的微囊藻表现出竞争优势,而对CO2浓度变化敏感的bicA基因型的微囊藻随无机碳浓度的升高逐渐增多;同时,在总碱度,pH和Chl.a影响下,微囊藻基因型在滇池不同微囊藻水华期呈现bicA→sbtA→bicA转变。这些结果说明微囊藻能通过调节不同CO2-浓缩机制基因藻株响应水体无机碳浓度,保持种群竞争优势,并维持水华的形成。;The highly efficient CO2 concentration mechanism (CCM) gives cyanobacteria a competitive advantage under low CO2 conditions. However, with the rapid increase in atmospheric CO2 concentration, little information has been presented on how the CO2 concentration mechanism of cyanobacteria responds. Therefore, this study takes a common blooming cyanobacterium, Microcystis, to investigate in the present by monitoring the dynamic changes and different CCM genotypes of Microcystis in Lake Dianchi. At the same time, the microevolutionary characteristics and dynamic changes of CCM genotypes in Microcystis were also discussed. Furthermore, the competing effects of different CCM genotypes in Microcystis at high (0.08%), medium (0.04%) and low (0.02%) CO2 concentrations (V/V) were compared. The results showed that the concentration of inorganic carbon (IC) in Lake Dianchi was spatially variable at four sampling sites, but all sites showed a trend of first decreasing and then increasing IC concentrations, and HCO-3 was the major form of IC. At the four sampling sites of DDH, GYS, LLH and STS, the sbtA genotype Microcystis was dominant and its relative abundance was much higher than that of the bicA genotype Microcystis. In different bloom periods, the bicA and sbtA genotypes of Microcystis showed opposite trends, i.e. the relative abundance of the sbtA genotype Microcystis gradually increased from early to mid- bloom, while the bicA genotype Microcystis increased only in late bloom. The competition experiments showed that the bicA genotype had an apparent competitive advantage in a high CO2 environment and showed a trend of transition from the bicA genotype to the sbtA genotype with decreasing CO2 concentration. These indicate that the IC concentration was relatively low in the middle of the bloom period, resulting in the sbtA genotype showing a competitive advantage in a carbon-limited environment, while the bicA genotype, a sensitive type to changing CO2 concentration, gradually increased with increasing IC concentration. In addition, the genotypes of Microcystis showed a bicA→sbtA→bicA transition during different Microcystis bloom periods in Lake Dianchi due to the effects of total alkalinity, pH and Chl.a. These results suggest that Microcystis can maintain its competitive
{"title":"Dynamic changes of genotypes of <i>Microcystis</i> CO<sub>2</sub>-concentration mechanism and their competitive effects on CO<sub>2</sub>","authors":"Du Yuxin, Zheng Baohai, Li Jiaxin, Li Yuxin, Huang Licheng, Shi Junqiong, Wu Zhongxing","doi":"10.18307/2023.0517","DOIUrl":"https://doi.org/10.18307/2023.0517","url":null,"abstract":"由于具有高效的CO<sub>2</sub>-浓缩机制,蓝藻在低CO<sub>2</sub>浓度条件下具有竞争优势。然而,随着大气中CO<sub>2</sub>浓度急剧增加,蓝藻CO<sub>2</sub>-浓缩机制如何响应的研究较少。因此,本文以常见水华蓝藻——微囊藻为研究对象,通过对滇池微囊藻水华动态及不同CO<sub>2</sub>-浓缩机制基因型进行监测,探讨蓝藻CO<sub>2</sub>-浓缩机制基因的微进化特征及其动态变化。同时,设置高(0.08%)、中(0.04%)、低(0.02%)CO<sub>2</sub>浓度(V/V)进一步揭示微囊藻不同CO<sub>2</sub>-浓缩机制基因微进化对CO<sub>2</sub>的竞争效应。结果表明:滇池无机碳浓度在4个采样点存在空间差异性,均呈现先降低后升高的趋势,并以HCO<sup>-</sup><sub>3</sub>为主要无机碳存在形式。调查期间,东大河、观音山、洛龙河和生态所4个采样点的微囊藻均以sbtA基因型占绝对优势,相对丰度远高于bicA基因型。在不同水华时期,bicA基因型和sbtA基因型呈现相反的变化趋势,即从水华前期到水华中期,sbtA基因型的相对丰度逐渐升高,而到水华后期,出现bicA基因型增多的现象。室内竞争实验同样表明高浓度CO<sub>2</sub>培养环境下,bicA基因型具有明显竞争优势,随CO<sub>2</sub>浓度的降低,呈现bicA基因型向sbtA基因型转变的趋势。这些结果表明水华中期无机碳浓度相对较低,能适应碳限制环境的sbtA基因型的微囊藻表现出竞争优势,而对CO<sub>2</sub>浓度变化敏感的bicA基因型的微囊藻随无机碳浓度的升高逐渐增多;同时,在总碱度,pH和Chl.a影响下,微囊藻基因型在滇池不同微囊藻水华期呈现bicA→sbtA→bicA转变。这些结果说明微囊藻能通过调节不同CO<sub>2</sub>-浓缩机制基因藻株响应水体无机碳浓度,保持种群竞争优势,并维持水华的形成。;The highly efficient CO<sub>2</sub> concentration mechanism (CCM) gives cyanobacteria a competitive advantage under low CO<sub>2</sub> conditions. However, with the rapid increase in atmospheric CO<sub>2</sub> concentration, little information has been presented on how the CO<sub>2</sub> concentration mechanism of cyanobacteria responds. Therefore, this study takes a common blooming cyanobacterium, Microcystis, to investigate in the present by monitoring the dynamic changes and different CCM genotypes of Microcystis in Lake Dianchi. At the same time, the microevolutionary characteristics and dynamic changes of CCM genotypes in Microcystis were also discussed. Furthermore, the competing effects of different CCM genotypes in Microcystis at high (0.08%), medium (0.04%) and low (0.02%) CO<sub>2</sub> concentrations (V/V) were compared. The results showed that the concentration of inorganic carbon (IC) in Lake Dianchi was spatially variable at four sampling sites, but all sites showed a trend of first decreasing and then increasing IC concentrations, and HCO<sup>-</sup><sub>3</sub> was the major form of IC. At the four sampling sites of DDH, GYS, LLH and STS, the sbtA genotype Microcystis was dominant and its relative abundance was much higher than that of the bicA genotype Microcystis. In different bloom periods, the bicA and sbtA genotypes of Microcystis showed opposite trends, i.e. the relative abundance of the sbtA genotype Microcystis gradually increased from early to mid- bloom, while the bicA genotype Microcystis increased only in late bloom. The competition experiments showed that the bicA genotype had an apparent competitive advantage in a high CO<sub>2</sub> environment and showed a trend of transition from the bicA genotype to the sbtA genotype with decreasing CO<sub>2</sub> concentration. These indicate that the IC concentration was relatively low in the middle of the bloom period, resulting in the sbtA genotype showing a competitive advantage in a carbon-limited environment, while the bicA genotype, a sensitive type to changing CO<sub>2</sub> concentration, gradually increased with increasing ","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Li Zhe, Yang Liu, Wu Xinghua, Cheng Yongbo, Lu Lunhui, Wang Dianchang
{"title":"Monitoring and analysis of CO2 and CH4 fluxes in the Three Gorges Reservoir","authors":"Li Zhe, Yang Liu, Wu Xinghua, Cheng Yongbo, Lu Lunhui, Wang Dianchang","doi":"10.18307/2023.0205","DOIUrl":"https://doi.org/10.18307/2023.0205","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67482816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Flux and form of phosphorus in overlying water at the effluent section of the Three Gorges Reservoir from 1998 to 2019","authors":"Lou Baofeng, Ouyang Xuejiao, Yang Xia","doi":"10.18307/2023.0201","DOIUrl":"https://doi.org/10.18307/2023.0201","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67482913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nitrogen and phosphorusas major factors shaping microbial community structures in surface sediments in Xiangxi River, Three Gorges Reservoir","authors":"Zhu Zhijie, Chen Mo, Xue Simin, Zhou Shiwei, Jiao Yiying, Tian Xiaofang","doi":"10.18307/2023.0208","DOIUrl":"https://doi.org/10.18307/2023.0208","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Vegetation productivity of the Lake Poyang Wetland in the post Three Gorges Dam era","authors":"Dai Xue, Yang Guishan, Wang Rongrong, Liao Yanyan","doi":"10.18307/2023.0215","DOIUrl":"https://doi.org/10.18307/2023.0215","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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