1
|
da Silva TT, Bortolini JC, Iatskiu P, Pilatti MC, Medeiros G, Amaral MWW, Guicho R, Bueno NC. Local environmental factors are the main drivers of phytoplankton biovolume in subtropical streams of Brazil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171663. [PMID: 38485007 DOI: 10.1016/j.scitotenv.2024.171663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 03/08/2024] [Accepted: 03/10/2024] [Indexed: 03/25/2024]
Abstract
The ecological attributes of phytoplankton in freshwater environments are strongly influenced by limnological factors and temporal variability. In this study, we investigated the importance of local environmental and regional (spatial and landscape) predictors in structuring stream phytoplankton from the perspective of metacommunity theory. We seasonally sampled phytoplankton and abiotic variables from nine streams in three subtropical basins. Variation partitioning was used to investigate the influence of environmental, landscape, and spatial predictors on phytoplankton biovolume. Independent of the hydrological period (dry and rainy), the phytoplankton communities were predominantly structured by local environmental factors. In addition, the different land uses considered (landscape) showed weak significance during the dry season, with emphasis on the rural category. Biovolume values remained low, and diatoms and green algae were the most representative groups. Our findings are consistent with recognized ecological patterns for potamoplankton and emphasize local environmental filters as a fundamental regulator of phytoplankton biodiversity in lotic environments.
Collapse
Affiliation(s)
- Thaís Tagliati da Silva
- Programa de Pós-graduação em Conservação e Manejo de Recursos Naturais, Universidade Estadual do Oeste do Paraná, Universitária Street, 2019, Cascavel, Paraná 85819-110, Brazil
| | - Jascieli Carla Bortolini
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Esperança Ave, s/n, Goiânia, Goiás 74690-900, Brazil.
| | - Patricia Iatskiu
- Programa de Pós-graduação em Conservação e Manejo de Recursos Naturais, Universidade Estadual do Oeste do Paraná, Universitária Street, 2019, Cascavel, Paraná 85819-110, Brazil.
| | - Maria Clara Pilatti
- Programa de Pós-graduação em Conservação e Manejo de Recursos Naturais, Universidade Estadual do Oeste do Paraná, Universitária Street, 2019, Cascavel, Paraná 85819-110, Brazil
| | - Gabriela Medeiros
- Centro Universitário de Cascavel, 2317, Tito Muffato Ave, Cascavel, Paraná 85806-080, Brazil
| | | | - Ricardo Guicho
- Centro Universitário de Cascavel, 2317, Tito Muffato Ave, Cascavel, Paraná 85806-080, Brazil
| | - Norma Catarina Bueno
- Programa de Pós-graduação em Conservação e Manejo de Recursos Naturais, Universidade Estadual do Oeste do Paraná, Universitária Street, 2019, Cascavel, Paraná 85819-110, Brazil
| |
Collapse
|
2
|
Zhu H, Li S, Wu Z, Xiong X, Lin P, Liu B, He D, Liu G. Diversity Patterns of Eukaryotic Phytoplankton in the Medog Section of the Yarlung Zangbo River. MICROBIAL ECOLOGY 2024; 87:59. [PMID: 38619730 PMCID: PMC11018697 DOI: 10.1007/s00248-024-02371-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 03/31/2024] [Indexed: 04/16/2024]
Abstract
As one of the important biodiversity conservation areas in China, the ecosystem in the lower reaches of the Yarlung Zangbo River is fragile, and is particularly sensitive to global changes. To reveal the diversity pattern of phytoplankton, the metabarcode sequencing was employed in the Medog section of the lower reaches of the Yarlung Zangbo River during autumn 2019 in present study. The phytoplankton assemblies can be significantly divided into the main stem and the tributaries; there are significant differences in the phytoplankton biomass, alpha and beta diversity between the main stem and the tributaries. While both the main stem and the tributaries are affected by dispersal limitation, the phytoplankton assemblages in the entire lower reaches are primarily influenced by heterogeneous selection. Community dissimilarity and assembly process were significantly correlated with turbidity, electrical conductivity, and nitrogen nutrition. The tributaries were the main source of the increase in phytoplankton diversity in the lower reaches of the Yarlung Zangbo River. Such diversity pattern of phytoplankton in the lower reach may be caused by the special habitat in Medog, that is, the excessive flow velocity, and the significant spatial heterogeneity in physical and chemical factors between stem and tributaries. Based on the results and conclusions obtained in present study, continuous long-term monitoring is essential to assess and quantify the impact of global changes on phytoplankton.
Collapse
Affiliation(s)
- Huan Zhu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Shuyin Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
- Eco-Environmental Monitoring and Scientific Research Center, Yangtze River Basin Ecological Environment Supervision and Management Bureau, Ministry of Ecology and Environment, Wuhan, 430010, China
| | - Zhihua Wu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
- College of Science, Tibet University, Lhasa, 850000, China
| | - Xiong Xiong
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Pengcheng Lin
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Benwen Liu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Dekui He
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Guoxiang Liu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| |
Collapse
|
3
|
Zhu H, Xiong X, Liu B, Liu G. Lakes-scale pattern of eukaryotic phytoplankton diversity and assembly process shaped by electrical conductivity in central Qinghai-Tibet Plateau. FEMS Microbiol Ecol 2024; 100:fiad163. [PMID: 38100388 PMCID: PMC10791044 DOI: 10.1093/femsec/fiad163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/15/2023] [Accepted: 12/13/2023] [Indexed: 12/17/2023] Open
Abstract
Phytoplankton are the main primary producers in aquatic ecosystems and play an important role in food web and geochemical cycles. Its diversity, community structure, and assembly process are influenced by several factors. Alpine lake ecosystems are relatively weak and extremely sensitive to global climate change. However, the impact of climate change on phytoplankton in Qinghai-Tibet Plateau lakes and their responses are still unclear. In this study, we analyzed the diversity, environmental drivers, and assembly process of phytoplankton community in the central QTP lakes. The phytoplankton of these lakes can be primarily distinguished into freshwater and brackish types, with significant differences in species diversity and community dissimilarity. Both shared nearly same key environmental factors that significantly affecting phytoplankton such as EC, and brackish lakes were also positively correlative with TN. Stochastic process was predominant in phytoplankton assembly. Additionally, freshwater and brackish lakes were dominated by dispersal limitation and heterogeneous selection respectively. Alpine lakes had significant EC thresholds, and their diversity and assembly processes changed significantly around the thresholds. The present findings have important implications for understanding and predicting the response of lake phytoplankton communities to climate change and for making decisions to protect the ecological resources of alpine lakes.
Collapse
Affiliation(s)
- Huan Zhu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Xiong Xiong
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Benwen Liu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Guoxiang Liu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| |
Collapse
|
4
|
Silva Rocha B, Jamoneau A, Logez M, Laplace-Treyture C, Reynaud N, Argillier C. Measuring biodiversity vulnerability in French lakes - The IVCLA index. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168205. [PMID: 37918736 DOI: 10.1016/j.scitotenv.2023.168205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/04/2023]
Abstract
Assessing the vulnerability of ecosystems to biodiversity loss has become increasingly crucial in conservation and ecology research. This study proposed a methodology for measuring lake vulnerability to biodiversity loss employing an established framework that combines three components. For this, we measured the resilience (functional redundancy) and sensitivity (an index considering three characteristics of rarity) components for fish and phytoplankton communities. We also measured the exposure component of the main stressors in lakes. We then combined the three components and calculated the vulnerability index (IVCLA) using data from 255 French lakes. We found that all lakes exhibited low levels of resilience, elevated sensitivity regarding average values for fish and phytoplankton groups, and medium exposure to stressors associated with human activities. In addition, there were some discrepancies in resilience and sensitivity patterns between fish and phytoplankton groups, emphasizing the importance of considering information from multiple biological groups when assessing ecosystem vulnerability. Hydrological alterations and low water quality were key stressors related to higher lake vulnerability. Most French lakes have been classified as exhibiting moderate vulnerability. It is crucial to emphasize the potential increase in exposure risks, which could lead to even higher vulnerability levels and, subsequently, biodiversity loss in the future. The IVCLA index offers several advantages, including integrating multiple taxa groups and stressors. We recommend incorporating additional data, such as the resilience and sensitivity of the entire food web, and considering temporal responses to stressors to improve accuracy and predictive power. The IVCLA was developed with the purpose of serving as an effective tool for guiding environmental managers in designing conservation strategies and making informed decisions for lake ecosystems.
Collapse
Affiliation(s)
- Barbbara Silva Rocha
- INRAE, Aix Marseille Université, UMR RECOVER, 3275 Route Cézanne, 13182 Aix-en-Provence, France; Pôle R&D ECLA, 13182 Aix-en-Provence, France.
| | - Aurélien Jamoneau
- INRAE, EABX, 50 avenue de Verdun, 33612 Cestas, France; Pôle R&D ECLA, 33612 Cestas, France
| | - Maxime Logez
- INRAE, RIVERLY, F-69625 Villeurbanne Cedex, France
| | | | - Nathalie Reynaud
- INRAE, Aix Marseille Université, UMR RECOVER, 3275 Route Cézanne, 13182 Aix-en-Provence, France; Pôle R&D ECLA, 13182 Aix-en-Provence, France
| | - Christine Argillier
- INRAE, Aix Marseille Université, UMR RECOVER, 3275 Route Cézanne, 13182 Aix-en-Provence, France; Pôle R&D ECLA, 13182 Aix-en-Provence, France
| |
Collapse
|
5
|
Huang Z, Pan B, Zhao X, Liu X, Liu X, Zhao G. Hydrological disturbances enhance stochastic assembly processes and decrease network stability of algae communities in a highland floodplain system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166207. [PMID: 37567295 DOI: 10.1016/j.scitotenv.2023.166207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/19/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Floodplains are hotspots for biodiversity research and conservation worldwide. Hydrological disturbances can profoundly influence the ecological processes and functions of floodplain systems by altering key biological groups such as algae communities. However, the impacts of flood disturbance on the assembly processes and co-occurrence patterns of algae communities in floodplain ecosystems are still unclear. To ascertain the response patterns of algae communities to flood disturbance, we characterized planktonic and benthic algae communities in 144 water and sediment samples collected from the Tibetan floodplain during non-flood and flood periods based on 23S ribosomal RNA gene sequencing. Results showed that planktonic algae exhibited higher diversity and greater compositional variations compared with benthic communities after flood disturbance. Flooding promoted algae community homogenization at horizontal (rivers vs. oxbow lakes) and vertical levels (water vs. sediment). Stochastic processes governed the assembly of distinct algae communities, and their ecological impacts were enhanced in response to flooding. In the non-flood period, dispersal limitation (81.78 %) was the primary ecological process driving algae community assembly. In the flood period, the relative contribution of ecological drift (72.91 %) to algae community assembly markedly increased, with dispersal limitation (22.61 %) being less important. Flooding reduced the interactions among algae taxa, resulting in lower network complexity and stability. Compared with the planktonic algae subnetworks, the benthic subnetworks showed greater stability in the face of flooding. Findings of this study broaden our understanding of how algae communities respond to hydrological disturbances from an ecological perspective and could be useful for the management of highland floodplain ecosystems.
Collapse
Affiliation(s)
- Zhenyu Huang
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, PR China.
| | - Baozhu Pan
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, PR China.
| | - Xiaohui Zhao
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, PR China.
| | - Xing Liu
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, PR China.
| | - Xinyuan Liu
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, PR China.
| | - Gengnan Zhao
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, Shaanxi 710048, PR China.
| |
Collapse
|
6
|
Chen Q, Hu W, Shen L, Shen W, Zhang X. The role of nutrients, wind speed, and rainfall in determining the composition of the algal community of shallow lakes in the Taoge water system, upstream from Lake Taihu, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:16195-16209. [PMID: 36180803 DOI: 10.1007/s11356-022-22935-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 09/04/2022] [Indexed: 06/16/2023]
Abstract
Gaining a deeper understanding of factors that influence changes in phytoplankton community has significant implications for shallow lake management. The present study examined changes in the algae community of three shallow eutrophic lakes of the Taoge water system between 2008 and 2018 and the related factors influencing these changes. The composition of the algal community varied significantly during this period with the relative diatom biomass in lakes Changdanghu and Gehu increasing between 2014 and 2016 and again decreasing after 2017. However, relative cyanobacteria biomass initially decreased and later increased; meanwhile, the proportion of biomass of other phyla decreased continuously in the study period. Lake Zhushanhu showed similar trends, although it eventually returned to its initial state with absolute Microcystis dominance. Furthermore, the analysis of driving factors revealed that the concentrations of total nitrogen (TN), nitrate (NO3), and orthophosphate (PO4) were significantly associated with a significant increase in Microcystis biomass. Meteorological conditions also influenced changes in total algal and diatom biomasses, which were inversely related to the daily mean and daily maximum wind speeds. Monthly cumulative precipitation was only significantly associated with diatom biomass. Meanwhile, rainfall primarily affected the algal community structure between 2013 and 2017; an increase in the relative biomass of diatoms coincided with increased precipitation. Coordinating nitrogen and phosphorous use within the Taoge water system should improve lake habitat management; a broader perspective in attempts to control global and regional climate change may be needed.
Collapse
Affiliation(s)
- Qiao Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Jiangsu Province Ecology and Environment Protection Key Laboratory of Aquatic Biomonitoring, Changzhou Environmental Monitoring Center of Jiangsu Province, Changzhou, 213001, China
| | - Weiping Hu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China.
| | - Lijuan Shen
- Jiangsu Province Ecology and Environment Protection Key Laboratory of Aquatic Biomonitoring, Changzhou Environmental Monitoring Center of Jiangsu Province, Changzhou, 213001, China
| | - Wei Shen
- Jiangsu Province Ecology and Environment Protection Key Laboratory of Aquatic Biomonitoring, Changzhou Environmental Monitoring Center of Jiangsu Province, Changzhou, 213001, China
| | - Xiang Zhang
- Jiangsu Province Ecology and Environment Protection Key Laboratory of Aquatic Biomonitoring, Changzhou Environmental Monitoring Center of Jiangsu Province, Changzhou, 213001, China
| |
Collapse
|
7
|
Yeanny MS, Barus TA, Mawengkang H, Mulya MB. Model of Phytoplankton Diversity in Belawan River, North Sumatera, Indonesia. Pak J Biol Sci 2023; 26:40-47. [PMID: 37129204 DOI: 10.3923/pjbs.2023.40.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
<b>Background and Objective:</b> Belawan River is located in Deli Serdang and Medan Districts, North Sumatra, Indonesia. Belawan River passes through residential areas, industry, steam power plants (PLTU), PDAM and encroachment. Waste is directly discharged into water bodies due to many human activities, so the quality of water and aquatic biota is disturbed. Phytoplankton diversity is influenced by water quality conditions because its existence depends heavily on the water conditions of the Belawan River. Analyzing the model of phytoplankton diversity in the Belawan River was the purpose of this study. <b>Materials and Methods:</b> The analysis was conducted in the form of phytoplankton diversity by obtaining phytoplankton species and their distribution and analyze the environment such as the water quality of the Belawan River. Sampling was taken by purposive random method with 5 different locations with 3 times the test with, namely starting from the upstream, middle and downstream Belawan River area in 2010, 2015 and 2020. Stages of research methods, obtained types of plankton, abundance (A), relative abundance (RA), presence frequency (PF), equitability (E) and diversity (H) and analysis of water quality (temperature, light penetration, light intensity, depth, current speed, salinity, pH, DO, oxygen saturation percent, BOD and COD). <b>Results:</b> Twenty three genera of phytoplankton were found in 2020. Phytoplankton abundance was highest in the <i>Chaetoceros</i> sp., genera with an abundance of 186 ind m<sup>2</sup> at station 5. Diversity (H) was highest at station 5 at 2.30 and lowest at station 5 at 1.87. Phytoplankton in five stations was relatively low. The DO has a very strong effect on phytoplankton's diversity. The model of phytoplankton diversity relationship with water quality is y = -2.09235475-0.283821248x<sub>1</sub>-0.000034042331x<sub>2</sub><sup>2</sup>-0.000000317192297x<sub>3</sub><sup>2</sup>+ 0.0000138747473x<sub>4</sub><sup>2</sup>-0.0642412267x<sub>5</sub><sup>2</sup>+0.0436398590x<sub>6</sub>-0.0107999363x<sub>7</sub><sup>2</sup>+0.0000469016376x<sub>8</sub><sup>2</sup>. <b>Conclusion:</b> Dissolved oxygen (DO) has an effect on the diversity of phytoplankton in the Belawan River where the highest phytoplankton is <i>Chaetoceros</i> sp., of 23 genera which was found with a diversity value of 2.30 at station V.
Collapse
|
8
|
Barbosa M, Lefler FW, Berthold DE, Briggs-Gonzalez VS, Mazzotti FJ, Laughinghouse HD. Trophic State Drives the Diversity of Protists in a Tropical River (New River, Belize). Microorganisms 2022; 10:microorganisms10122425. [PMID: 36557678 PMCID: PMC9782246 DOI: 10.3390/microorganisms10122425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
Land use disrupts the ecosystem functioning of freshwater systems and significantly affects trophic state. Consequently, biodiversity is severely affected by changes to the ecosystem. Microbial eukaryotes (i.e., protists) play an essential role in ecosystem functioning, contributing to biogeochemical processes, nutrient cycling, and food webs. Protist composition is a useful biological quality parameter for monitoring aquatic ecosystems and determining aquatic system health. In this study, we investigated the effects of land usage and trophic state on the communities of microbial eukaryotes in the New River (Belize, C.A.). Land use and trophic state both significantly affected protist community compositions, with impacted and mesotrophic sampled sites having higher biodiversity when compared to other sites. Autotrophic organisms dominated indirectly impacted and eutrophic sites, while impacted and mesotrophic sites had proportional ratios of autotrophic and heterotrophic organisms. Our study highlights the significant effects of trophic gradients on protistan community composition, even at the local scales.
Collapse
Affiliation(s)
- Maximiliano Barbosa
- Agronomy Department, Ft. Lauderdale Research and Education Center, University of Florida/IFAS, 3205 College Avenue, Davie, FL 33314, USA
| | - Forrest W. Lefler
- Agronomy Department, Ft. Lauderdale Research and Education Center, University of Florida/IFAS, 3205 College Avenue, Davie, FL 33314, USA
| | - David E. Berthold
- Agronomy Department, Ft. Lauderdale Research and Education Center, University of Florida/IFAS, 3205 College Avenue, Davie, FL 33314, USA
| | - Venetia S. Briggs-Gonzalez
- Wildlife Ecology and Conservation Department, Ft. Lauderdale Research and Education Center, University of Florida/IFAS, 3205 College Avenue, Davie, FL 33314, USA
| | - Frank J. Mazzotti
- Wildlife Ecology and Conservation Department, Ft. Lauderdale Research and Education Center, University of Florida/IFAS, 3205 College Avenue, Davie, FL 33314, USA
| | - H. Dail Laughinghouse
- Agronomy Department, Ft. Lauderdale Research and Education Center, University of Florida/IFAS, 3205 College Avenue, Davie, FL 33314, USA
- Correspondence:
| |
Collapse
|
9
|
Maberly SC, Chao A, Finlay BJ. Seasonal Patterns of Phytoplankton Taxon Richness in Lakes: Effects of Temperature, Turnover and Abundance. Protist 2022; 173:125925. [PMID: 36343516 DOI: 10.1016/j.protis.2022.125925] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/03/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
Abstract
Species richness is a key ecological characteristic that influences numerous ecosystem functions. Here we analyse the patterns and possible causes of phytoplankton taxon richness in seasonal datasets from twenty contrasting lakes in the English Lake District over six years and near-weekly datasets over 33 years from Windermere. Taxon richness was lowest in winter and highest in summer or autumn in all of the lakes. Observed richness was very similar to richness estimated from coverage and sampling effort, implying that it closely reflected true seasonal patterns. Summer populations were dominated by Chlorophyta and functional groups X1, F, N and P (sensu Reynolds). In Windermere, weekly taxon richness was strongly positively correlated with surface water temperature, as was the number of functional groups and the number of taxa per functional group. Turnover in richness of taxa and functional groups were positively correlated and both were related to surface temperature. This suggests that high taxon richness in summer is linked to higher water temperature, promoting a turnover in richness of taxa and functional groups in these lakes. However, since the number of taxa per unit concentration of chlorophyll a decreased with increasing concentration of chlorophyll a, competition might occur when abundance is high.
Collapse
Affiliation(s)
- Stephen C Maberly
- Lake Ecosystems Group, UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster LA1 4AP, UK.
| | - Anne Chao
- Institute of Statistics, National Tsing Hua University, Hsin Chu 30043, Taiwan
| | - Bland J Finlay
- School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| |
Collapse
|
10
|
Zhou Q, Zhang Y, Tao J, Ye L, Wang H, Shan K, Jeppesen E, Song L. Water depth and land-use intensity indirectly determine phytoplankton functional diversity and further regulate resource use efficiency at a multi-lake scale. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155303. [PMID: 35447191 DOI: 10.1016/j.scitotenv.2022.155303] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 04/11/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Biodiversity-ecosystem functioning relationships under multiple pressures have recently been the subject of broad studies. For the key primary producer in aquatic ecosystems, phytoplankton, several studies have focused on trait-based functional diversity (FD) and the related functioning (e.g., resource use efficiency, RUE), and their linkages. However, investigations of the effects of environmental factors at different levels (e.g., land use, lake morphometry, climate and nutrients) on FD and RUE are sparse. We developed a data-driven-model framework to simultaneously elucidate the effects of multiple drivers on FD (functional diversity based on dendrograms, FDc and functional richness, FRic) and RUE (of nitrogen and phosphorus) of phytoplankton based on data from 68 Yunnan-Guizhou Plateau lakes, Southwest China. We found that the concentration of total phosphorus, which is mainly affected by land-use intensity and influenced by water depth, was the primary (positive) driver of changes in both FDc and FRic, while RUE was mainly explained by phytoplankton FD (i.e., FRic). These results indicate that water depth and land-use intensity influence indirectly phytoplankton FD and further regulate RUE. Moreover, nonlinear correlations of RUE with FRic were found, which may be caused by interspecific competition and niche differentiation of the phytoplankton community related to nutrient levels. Our finding may help managers to set trade-off targets between FD and RUE in lake ecosystems except for extremely polluted ones, in which the thresholds derived from the Bayesian network, of total phosphorus, total nitrogen and land-use intensity were approximately 0.04 mg/L, 0.50 mg/L and 244 (unitless), respectively. The probability of meeting the RUE objectives was lower in shallow lakes than in deep lakes, but for FRic the opposite was observed.
Collapse
Affiliation(s)
- Qichao Zhou
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Yunnan Research Academy of Eco-environmental Sciences, Kunming 650034, China.
| | - Yun Zhang
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, China
| | - Juan Tao
- Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China
| | - Lin Ye
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Haijun Wang
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, China
| | - Kun Shan
- Chongqing Key Laboratory of Big Data and Intelligent Computing, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.
| | - Erik Jeppesen
- Department of Ecoscience, Aarhus University, Silkeborg 8600, Denmark; Sino-Danish Centre for Education and Research, Beijing 100049, China; Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara 06800, Turkey; Institute of Marine Sciences, Middle East Technical University, Mersin, Turkey
| | - Lirong Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| |
Collapse
|
11
|
Bertucci JI, Juez A, Bellas J. Impact of microplastics and ocean acidification on critical stages of sea urchin (Paracentrotus lividus) early development. CHEMOSPHERE 2022; 301:134783. [PMID: 35504467 DOI: 10.1016/j.chemosphere.2022.134783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/23/2022] [Accepted: 04/27/2022] [Indexed: 06/14/2023]
Abstract
One of the major consequences of increasing atmospheric CO2 is a phenomenon known as ocean acidification. This alteration of water chemistry can modulate the impact on marine organisms of other stressors also present in the environment, such as microplastics (MP). The objective of this work was to determine the combined impact of microplastic pollution and ocean acidification on the early development of Paracentrotus lividus. To study these multi-stressor impacts on development P. lividus the sea urchin embryo test (SET) was used. Newly fertilised embryos of P. lividus were exposed to a control treatment (filtered natural seawater), MP (3000 particles/mL), acidified sea water (pH = 7.6), and a combination of MP and acidification (3000 particles/mL + pH = 7.6). After 48, 72, and 96 h measurements of growth and morphometric parameters were taken. Results showed that ocean acidification and MP cause alterations in growth and larval morphology both before and after the larvae start to feed exogenously. The exposure to MP under conditions of ocean acidification did not produce any additional effect on growth, but differences were observed at the morphological level related to a decrease in the width of larvae at 48 h. Overall, changes in larvae shape observed at three key points of their development could modify their buoyancy affecting their ability to obtain and ingest food. Therefore, ocean acidification and MP pollution might compromise the chances of P. lividus to survive in the environment under future scenarios of global climate change.
Collapse
Affiliation(s)
- J I Bertucci
- Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO-CSIC), Subida a Radio Faro, 50, 36390, Vigo, Pontevedra, Spain.
| | - A Juez
- Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO-CSIC), Subida a Radio Faro, 50, 36390, Vigo, Pontevedra, Spain
| | - J Bellas
- Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO-CSIC), Subida a Radio Faro, 50, 36390, Vigo, Pontevedra, Spain
| |
Collapse
|
12
|
Okhapkin A, Sharagina E, Kulizin P, Startseva N, Vodeneeva E. Phytoplankton Community Structure in Highly-Mineralized Small Gypsum Karst Lake (Russia). Microorganisms 2022; 10:microorganisms10020386. [PMID: 35208841 PMCID: PMC8879963 DOI: 10.3390/microorganisms10020386] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/26/2022] [Accepted: 01/27/2022] [Indexed: 12/19/2022] Open
Abstract
Gypsum karst lakes are unique water ecosystems characterized by specific habitat conditions for living organisms, including phytoplankton species, as primary producers and mediating biogeochemical cycles in the water bodies. Studies of diversity and structure of phytoplankton communities can be used to identify the specific and typical lake features and plan basin-wide monitoring. The aim of this research was to analyze the structural variables of algocenoses in the small gypsum karstic Lake Klyuchik (Middle Volga basin), atypical for the subzone of mixed coniferous and deciduous forest zone high values of water mineralization (brackish water) and low temperatures. The lake has two water areas, connected by a shallow strait (ecotone zone) and differing from each other in the chemical compositions and physical properties of the water. A total of 133 species of phytoplankton with prevalence percentages of Bacillariophyta (46%), Chlorophyta (24%), and Ochrophyta (11%) were found; α-diversity varied from 4 to 30 specific and intraspecific taxa per sample. According to Spearman’s correlation coefficients, the diversity indices (Shannon, Pielou, Simpson) were mainly determined by the number of dominant species. The uniquely high (up to 130 g/m3) biomass of phytoplankton was noted in the ecotone, on the border between the water column and the bottom. The formation of mono- and oligo-dominant nannoplankton diatom communities with a predominance of the rare species Cyclotella distinguenda Hustedt was demonstrated there. The roles of flagellate algae and cyanobacteria were found to be less significant.
Collapse
Affiliation(s)
- Alexander Okhapkin
- Department of Botany and Zoology, Institute of Biology and Biomedicine, Lobachevsky State University, 603950 Nizhny Novgorod, Russia; (A.O.); (E.S.); (P.K.); (N.S.)
| | - Ekaterina Sharagina
- Department of Botany and Zoology, Institute of Biology and Biomedicine, Lobachevsky State University, 603950 Nizhny Novgorod, Russia; (A.O.); (E.S.); (P.K.); (N.S.)
| | - Pavel Kulizin
- Department of Botany and Zoology, Institute of Biology and Biomedicine, Lobachevsky State University, 603950 Nizhny Novgorod, Russia; (A.O.); (E.S.); (P.K.); (N.S.)
| | - Natalja Startseva
- Department of Botany and Zoology, Institute of Biology and Biomedicine, Lobachevsky State University, 603950 Nizhny Novgorod, Russia; (A.O.); (E.S.); (P.K.); (N.S.)
| | - Ekaterina Vodeneeva
- Department of Botany and Zoology, Institute of Biology and Biomedicine, Lobachevsky State University, 603950 Nizhny Novgorod, Russia; (A.O.); (E.S.); (P.K.); (N.S.)
- Nizhny Novgorod Branch of the Federal State Budgetary Scientific Institution “Russian Research Institute of Fisheries and Oceanography”, 603116 Nizhny Novgorod, Russia
- Correspondence: ; Tel.: +7-9-10-3968-975
| |
Collapse
|
13
|
Seasonal and spatial patterns of eukaryotic phytoplankton communities in an urban river based on marker gene. Sci Rep 2021; 11:23147. [PMID: 34848755 PMCID: PMC8633359 DOI: 10.1038/s41598-021-02183-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 11/10/2021] [Indexed: 11/08/2022] Open
Abstract
The seasonal and spatial eukaryotic phytoplankton composition in the Fenhe River was investigated based on the 18S rDNA V4 region. The relationship between phytoplankton functional groups and environmental factors was explored to effectively capture the responses of these taxa to environmental gradients and their effects on ecosystem function. Our results indicated that the Chlorophyta and Bacillariophyta had higher relative abundance than other taxa, and their diversity and richness indices in spring were higher than those in other seasons. The linear discriminant analysis effect size (LEfSe) analyses detected that the potential seasonal biomarkers included Desmodesmus, Cyclotella, Pseudoschroederia, Discostella, Scenedesmus, Monoraphidium, and Nannochloropsis; the spatial biomarkers included Amphora, Neochloris, Hindakia, Pseudomuriella, Coccomyxa, Chloroidium, Scherffelia, Chromochloris, and Scotinosphaera. The systemic evolution and distribution characteristics of the first 50 representative sequences showed that the dominant genus included Desmodesmus in spring, Pseudopediastrum in summer, Mychonastes in autumn, and Monoraphidium in winter. Main seasonal variation of phytoplankton functional groups was as follows: spring (J + F + C + X1) → summer (J + F + X1 + X2) → autumn (J + F + X1 + C) → winter (X1 + J + B + X2). Pearson correlation, redundancy analysis, and variance partitioning analysis showed temperature and phosphate were the determining factors causing the changes of phytoplankton functional groups and community composition in the Fenhe River.
Collapse
|
14
|
Gogoi P, Kumari S, Sarkar UK, Lianthuamluaia L, Puthiyottil M, Bhattacharjya BK, Das BK. Dynamics of phytoplankton community in seasonally open and closed wetlands in the Teesta-Torsa basin, India, and management implications for sustainable utilization. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:810. [PMID: 34783911 DOI: 10.1007/s10661-021-09587-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
The present study deals with the broader understanding of phytoplankton assemblage pattern and their ecohydrological interactions in two ecologically distinct floodplain wetlands of Teesta - Torsa basin, India. Analyses of data revealed significant seasonal variations (p ≤ 0.05) of ten water variables (temperature, transparency, pH, conductivity, total dissolved solids, dissolved oxygen, total hardness, total alkalinity, PO4 - P, and SiO4 - Si) in both the wetlands; however, no significant variation was observed among the sampling stations. In total, 128 species of phytoplankton were recorded (118 species belonging to 94 genera in seasonally open; 103 species belonging to 86 genera in closed wetland). Four algal groups, viz. Cyanophyceae, Coscinodiscophyceae, Bacillariophyceae, and Chlorophyceae, were the dominant quantitative component, remarkably influencing the total phytoplankton population in both the wetlands, contributing ~ 87% of total phytoplankton. Species Aulacoseira granulata alone contributed 12 - 41% and 8 - 34% to the total phytoplankton in the seasonally open and closed wetland, respectively, and indicated high organic load in both the wetlands. Altogether thirty-six and thirty-one phytoplankton taxa appeared as major indicators across the seasons for seasonally open and closed wetland, respectively. The indicator taxa (Aulacoseira, Oscillatoria, Dolichospermum, Spirogyra, Synedra, Nitzschia, Navicula, Euglena, Phacus) in both the wetlands hinted that the wetlands are under pollution pressure. The assemblage structure of phytoplankton was related to transparency, NO3 - N, PO4 - P, SiO4 - Si, total dissolved solids, and temperature as evident from BIO - ENV. Furthermore, the marginal test also selected similar variables (depth, transparency, conductivity, PO4 - P, SiO4 - Si) for seasonally open and the variables such as depth, conductivity, total dissolved solids, total alkalinity, and NO3 - N for the closed wetland. The study showed that the seasonal riverine connectivity greatly influences the variations in phytoplankton community in the seasonally open wetland.
Collapse
Affiliation(s)
- Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Kolkata Research Station, C.G.O. Complex, Salt Lake City, Sector - 1, Kolkata - 700064, West Bengal, India
| | - Suman Kumari
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India
| | - Uttam Kumar Sarkar
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India.
| | | | - Mishal Puthiyottil
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India
| | - Birendra Kumar Bhattacharjya
- ICAR-Central Inland Fisheries Research Institute, Regional Centre, Guwahati, HOUSEFED Complex, Dispur, Guwahati - 781006, Assam, India
| | - Basanta Kumar Das
- ICAR, -Central Inland Fisheries Research Institute, Barrackpore, Kolkata - 700120, West Bengal, India
| |
Collapse
|
15
|
Borics G, B-Béres V, Bácsi I, Lukács BA, T-Krasznai E, Botta-Dukát Z, Várbíró G. Trait convergence and trait divergence in lake phytoplankton reflect community assembly rules. Sci Rep 2020; 10:19599. [PMID: 33177646 PMCID: PMC7658209 DOI: 10.1038/s41598-020-76645-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 10/27/2020] [Indexed: 02/08/2023] Open
Abstract
Environmental filtering and limiting similarity are those locally acting processes that influence community structure. These mechanisms acting on the traits of species result in trait convergence or divergence within the communities. The role of these processes might change along environmental gradients, and it has been conceptualised in the stress-dominance hypothesis, which predicts that the relative importance of environmental filtering increases and competition decreases with increasing environmental stress. Analysing trait convergence and divergence in lake phytoplankton assemblages, we studied how the concepts of ‘limiting similarity’ versus ‘environmental filtering’ can be applied to these microscopic aquatic communities, and how they support or contradict the stress-dominance hypothesis. Using a null model approach, we investigated the divergence and convergence of phytoplankton traits along environmental gradients represented by canonical axes of an RDA. We used Rao’s quadratic entropy as a measure of functional diversity and calculated effect size (ES) values for each sample. Negative ES values refer to trait convergence, i.e., to the higher probability of the environmental filtering in community assembly, while positive values indicate trait divergence, stressing the importance of limiting similarity (niche partitioning), that is, the competition between the phytoplankters. Our results revealed that limiting similarity and environmental filtering may operate simultaneously in phytoplankton communities, but these assembly mechanisms influenced the distribution of phytoplankton traits differently, and the effects show considerable changes along with the studied scales. Studying the changes of ES values along with the various scales, our results partly supported the stress-dominance hypothesis, which predicts that the relative importance of environmental filtering increases and competition decreases with increasing environmental stress.
Collapse
Affiliation(s)
- Gábor Borics
- Department of Tisza Research, Danube Research Institute, Centre for Ecological Research, 18/c. Bem square, 4026, Debrecen, Hungary
| | - Viktória B-Béres
- Department of Tisza Research, Danube Research Institute, Centre for Ecological Research, 18/c. Bem square, 4026, Debrecen, Hungary
| | - István Bácsi
- Department of Hydrobiology, University of Debrecen, P.O. Box 57, 4010, Debrecen, Hungary
| | - Balázs A Lukács
- Wetland Ecology Research Group, Danube Research Institute, Centre for Ecological Research, 18/c. Bem square, 4026, Debrecen, Hungary
| | - E T-Krasznai
- Department of Tisza Research, Danube Research Institute, Centre for Ecological Research, 18/c. Bem square, 4026, Debrecen, Hungary
| | - Zoltán Botta-Dukát
- Institute of Ecology and Botany, Centre for Ecological Research, 2-4. Alkotmány Str., 2163, Vácrátót, Hungary
| | - Gábor Várbíró
- Department of Tisza Research, Danube Research Institute, Centre for Ecological Research, 18/c. Bem square, 4026, Debrecen, Hungary.
| |
Collapse
|