1
|
Xu Y, Ge LL, Cheng XF, Xiang XL, Wen XL, Wang YJ, Fu H, Ge YL, Xi YL. Temporal Distribution Patterns of Cryptic Brachionus calyciflorus (Rotifera) Species in Relation to Biogeographical Gradient Associated with Latitude. Animals (Basel) 2024; 14:244. [PMID: 38254413 PMCID: PMC10812649 DOI: 10.3390/ani14020244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 12/30/2023] [Accepted: 01/10/2024] [Indexed: 01/24/2024] Open
Abstract
Sympatric distribution and temporal overlap of cryptic zooplankton species pose a challenge to the framework of the niche differentiation theory and the mechanisms allowing competitor coexistence. We applied the methods of phylogenetic analysis, DNA taxonomy, and statistical analysis to study the temporal distribution patterns of the cryptic B. calyciflorus species, an excellent model, in three lakes, and to explore the putative mechanisms for their seasonal succession and temporal overlap. The results showed that in the warm-temperate Lake Yunlong, B. fernandoi and B. calyciflorus s.s. underwent a seasonal succession, which was largely attributed to their differential adaptation to water temperature. In the subtropical Lake Jinghu, B. fernandoi, B. calyciflorus s.s., and B. dorcas exhibited both seasonal succession and temporal overlap. Seasonal successions were largely attributed to their differential adaptation to temperature, and temporal overlap resulted from their differential responses to algal food concentration. In the tropical Lake Jinniu, B. calyciflorus s.s. persisted throughout the year and overlapped with B. dorcas for 5 months. The temporal overlap resulted from their differential responses to copepod predation. These results indicated that the temporal distribution pattern of the cryptic B. calyciforus species and the mechanism that allows competitor coexistence vary with different climate zones.
Collapse
Affiliation(s)
- Yuan Xu
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; (Y.X.); (L.-L.G.); (X.-F.C.); (X.-L.X.); (X.-L.W.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-Funded by Anhui Province and Ministry of Education of the People’s Republic of China, Anhui Normal University, Wuhu 241002, China
| | - Le-Le Ge
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; (Y.X.); (L.-L.G.); (X.-F.C.); (X.-L.X.); (X.-L.W.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-Funded by Anhui Province and Ministry of Education of the People’s Republic of China, Anhui Normal University, Wuhu 241002, China
| | - Xin-Feng Cheng
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; (Y.X.); (L.-L.G.); (X.-F.C.); (X.-L.X.); (X.-L.W.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-Funded by Anhui Province and Ministry of Education of the People’s Republic of China, Anhui Normal University, Wuhu 241002, China
| | - Xian-Ling Xiang
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; (Y.X.); (L.-L.G.); (X.-F.C.); (X.-L.X.); (X.-L.W.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-Funded by Anhui Province and Ministry of Education of the People’s Republic of China, Anhui Normal University, Wuhu 241002, China
| | - Xin-Li Wen
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; (Y.X.); (L.-L.G.); (X.-F.C.); (X.-L.X.); (X.-L.W.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-Funded by Anhui Province and Ministry of Education of the People’s Republic of China, Anhui Normal University, Wuhu 241002, China
| | - Yong-Jin Wang
- Management Committee of Scenic Attraction of Lake Yunlong, Xuzhou 221007, China;
| | - Hao Fu
- Reservoir Management Office of Lake Yunlong, Xuzhou 221007, China;
| | - Ya-Li Ge
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; (Y.X.); (L.-L.G.); (X.-F.C.); (X.-L.X.); (X.-L.W.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-Funded by Anhui Province and Ministry of Education of the People’s Republic of China, Anhui Normal University, Wuhu 241002, China
| | - Yi-Long Xi
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; (Y.X.); (L.-L.G.); (X.-F.C.); (X.-L.X.); (X.-L.W.)
- Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-Funded by Anhui Province and Ministry of Education of the People’s Republic of China, Anhui Normal University, Wuhu 241002, China
| |
Collapse
|
2
|
Fang W, Fan T, Xu L, Wang S, Wang X, Lu A, Chen Y. Seasonal succession of microbial community co-occurrence patterns and community assembly mechanism in coal mining subsidence lakes. Front Microbiol 2023; 14:1098236. [PMID: 36819062 PMCID: PMC9936157 DOI: 10.3389/fmicb.2023.1098236] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 01/17/2023] [Indexed: 02/05/2023] Open
Abstract
Coal mining subsidence lakes are classic hydrologic characteristics created by underground coal mining and represent severe anthropogenic disturbances and environmental challenges. However, the assembly mechanisms and diversity of microbial communities shaped by such environments are poorly understood yet. In this study, we explored aquatic bacterial community diversity and ecological assembly processes in subsidence lakes during winter and summer using 16S rRNA gene sequencing. We observed that clear bacterial community structure was driven by seasonality more than by habitat, and the α-diversity and functional diversity of the bacterial community in summer were significantly higher than in winter (p < 0.001). Canonical correspondence analysis indicated that temperature and chlorophyll-a were the most crucial contributing factors influencing the community season variations in subsidence lakes. Specifically, temperature and chlorophyll-a explained 18.26 and 14.69% of the community season variation, respectively. The bacterial community variation was driven by deterministic processes in winter but dominated by stochastic processes in summer. Compared to winter, the network of bacterial communities in summer exhibited a higher average degree, modularity, and keystone taxa (hubs and connectors in a network), thereby forming a highly complex and stable community structure. These results illustrate the clear season heterogeneity of bacterial communities in subsidence lakes and provide new insights into revealing the effects of seasonal succession on microbial assembly processes in coal mining subsidence lake ecosystems.
Collapse
Affiliation(s)
- Wangkai Fang
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, China
- Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources and Ecological Protection in Mining Area With High Groundwater Level, Huainan, China
| | - Tingyu Fan
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, China
- Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources and Ecological Protection in Mining Area With High Groundwater Level, Huainan, China
| | - Liangji Xu
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, China
- Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources and Ecological Protection in Mining Area With High Groundwater Level, Huainan, China
| | - Shun Wang
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, China
- Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources and Ecological Protection in Mining Area With High Groundwater Level, Huainan, China
| | - Xingming Wang
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, China
- Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources and Ecological Protection in Mining Area With High Groundwater Level, Huainan, China
| | - Akang Lu
- School of Earth and Environment, Anhui University of Science and Technology, Huainan, China
- Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources and Ecological Protection in Mining Area With High Groundwater Level, Huainan, China
| | - Yongchun Chen
- National Engineering Laboratory of Coal Mine Ecological Environment Protection, Huainan, China
| |
Collapse
|
3
|
Liu J, Qiao Y, Xin Y, Li Y, Zhang XH. Seasonal Succession and Temperature Response Pattern of a Microbial Community in the Yellow Sea Cold Water Mass. Appl Environ Microbiol 2022; 88:e0116922. [PMID: 36000863 DOI: 10.1128/aem.01169-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Explaining the temporal dynamics of marine microorganisms is critical for predicting their changing pattern under environmental disturbances. Although the effect of temperature on microbial seasonality has been widely studied, the phylogenetic structure of the temperature response pattern and the extent to which temperature shift leads to disruptive community changes are still unclear. Here, we explored the microbial seasonal dynamics in the Yellow Sea Cold Water Mass (YSCWM) that occurs in summer and disappears in winter and tested the temperature thresholds and phylogenetic coherence in response to temperature change. The existence of YSCWM generates strong temperature gradients in summer and confers little temperature change during seasonal transition, thus representing a unique intermediate state. The microbial community of YSCWM is more similar to that in the previous YSCWM in winter than that outside YSCWM. Temperature alone explains >50% of the community variation, suggesting that a temperature shift can induce a nearly seasonality-level community variance in summer. Persistence of most previous winter YSCWM inhabitants in YSCWM leads to conservation in predicted functional potentials and cooccurrence patterns, indicating a decisive role of temperature in maintaining functionality. Evaluation of the temperature threshold reveals that a small temperature change can lead to significant community turnover, with most taxa negatively responding to an elevation in temperature. The temperature response pattern is phylogenetically structured, and closely related taxa show an incohesive response. Our study provides novel insights into microbial seasonality and into how marine microorganisms respond to temperature fluctuations. IMPORTANCE Microbial seasonality is driven by a set of covarying factors including temperature. There is still a lack of understanding of the details of the phylogenetic structure and susceptibility of microbial communities in response to temperature variation. Through examination of the microbial community in a seasonally occurring summer cold water mass, which experiences little temperature change during seasonal transition, we show here that the cold water mass leads to nearly seasonality-level variations in community composition and predicted functional profile in summer. Moreover, massive community turnover occurs within a small temperature shift, with most taxa decreasing in abundance in response to increased temperature, and contrasting response patterns are observed between phylogenetically closely related taxa. These results suggest temperature as the fundamental factor over other covarying factors in structuring microbial seasonality, providing important insights into the variation mode of the microbial community under temperature disturbances.
Collapse
|
4
|
Hevroni G, Flores-Uribe J, Béjà O, Philosof A. Seasonal and diel patterns of abundance and activity of viruses in the Red Sea. Proc Natl Acad Sci U S A 2020; 117:29738-47. [PMID: 33172994 DOI: 10.1073/pnas.2010783117] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Virus-microbe interactions have been studied in great molecular details for many years in cultured model systems, yielding a plethora of knowledge on how viruses use and manipulate host machinery. Since the advent of molecular techniques and high-throughput sequencing, methods such as cooccurrence, nucleotide composition, and other statistical frameworks have been widely used to infer virus-microbe interactions, overcoming the limitations of culturing methods. However, their accuracy and relevance is still debatable as cooccurrence does not necessarily mean interaction. Here we introduce an ecological perspective of marine viral communities and potential interaction with their hosts, using analyses that make no prior assumptions on specific virus-host pairs. By size fractionating water samples into free viruses and microbes (i.e., also viruses inside or attached to their hosts) and looking at how viral group abundance changes over time along both fractions, we show that the viral community is undergoing a change in rank abundance across seasons, suggesting a seasonal succession of viruses in the Red Sea. We use abundance patterns in the different size fractions to classify viral clusters, indicating potential diverse interactions with their hosts and potential differences in life history traits between major viral groups. Finally, we show hourly resolved variations of intracellular abundance of similar viral groups, which might indicate differences in their infection cycles or metabolic capacities.
Collapse
|
5
|
Loewen CJG, Wyatt FR, Mortimer CA, Vinebrooke RD, Zurawell RW. Multiscale drivers of phytoplankton communities in north-temperate lakes. Ecol Appl 2020; 30:e02102. [PMID: 32086975 DOI: 10.1002/eap.2102] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 07/17/2019] [Accepted: 12/20/2019] [Indexed: 06/10/2023]
Abstract
Multiple factors operating across different spatial and temporal scales affect β-diversity, the variation in community composition among sites. Disentangling the relative influence of co-occurring ecological drivers over broad biogeographic gradients and time is critical to developing mechanistic understanding of community responses to natural environmental heterogeneity as well as predicting the effects of anthropogenic change. We partitioned taxonomic β-diversity in phytoplankton communities across 75 north-temperate lakes and reservoirs in Alberta, Canada, using data-driven, spatially constrained null models to differentiate between spatially structured, spatially independent, and spuriously correlated associations with a suite of biologically relevant environmental variables. Phytoplankton β-diversity was largely independent of space, indicating spatial processes (e.g., dispersal limitation) likely play a minor role in structuring communities at the regional scale. Our analysis also identified seasonal differences in the importance of environmental factors, suggesting a general shift toward greater relevance of local, in-lake (e.g., nutrients and Secchi depth) over regional, atmospheric and catchment-level (e.g., monthly solar radiation and grassland coverage) drivers as the open-water growing season progressed. Several local and regional variables explained taxonomic variation jointly, reflecting climatic and land-use linkages (e.g., air temperature and water column stability or pastureland and nutrient enrichment) that underscore the importance of understanding how phytoplankton communities integrate, and may serve as sentinels of, broader anthropogenic changes. We also discovered similar community composition in natural and constructed water bodies, demonstrating rapid filtering of regional species to match local environmental conditions in reservoirs comparable to those in natural habitats. Finally, certain factors related to human footprint (e.g., cropland development) explained the composition of bloom-forming and/or toxic cyanobacteria more than the overall phytoplankton community, suggesting their heightened importance to integrated watershed management.
Collapse
Affiliation(s)
- Charlie J G Loewen
- Environmental Monitoring and Science Division, Alberta Environment and Parks, T5J 5C6, Edmonton, Alberta, Canada
| | - Faye R Wyatt
- Environmental Monitoring and Science Division, Alberta Environment and Parks, T5J 5C6, Edmonton, Alberta, Canada
| | - Colleen A Mortimer
- Environmental Monitoring and Science Division, Alberta Environment and Parks, T5J 5C6, Edmonton, Alberta, Canada
| | - Rolf D Vinebrooke
- Department of Biological Sciences, University of Alberta, T6G 2E9, Edmonton, Alberta, Canada
| | - Ron W Zurawell
- Environmental Monitoring and Science Division, Alberta Environment and Parks, T5J 5C6, Edmonton, Alberta, Canada
| |
Collapse
|
6
|
Wang H, Zhao D, Chen L, Giesy JP, Zhang W, Yuan C, Ni L, Shen H, Xie P. Light, but Not Nutrients, Drives Seasonal Congruence of Taxonomic and Functional Diversity of Phytoplankton in a Eutrophic Highland Lake in China. Front Plant Sci 2020; 11:179. [PMID: 32210990 PMCID: PMC7067047 DOI: 10.3389/fpls.2020.00179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 02/06/2020] [Indexed: 06/10/2023]
Abstract
Information on temporal dynamics of phytoplankton communities and their responses to environmental factors can provide insights into mechanisms driving succession of phytoplankton communities that is useful in programs to manage and or remediate undesirable assemblages. Populations of phytoplankton can be controlled by bottom-up factors such as nutrients and temperature or top-down such as predation by zooplankton. Traditionally, taxonomic diversity based on morphologies has been the measure used for analysis of responses to environmental factors. Recently, according to functional groupings, including functional groups (FG), morpho-FG (MFG), and morphology-based FG (MBFG), functional diversity has been used to represent functional aspects of phytoplankton communities. However, to what extent these taxonomic and functional groupings are congruent at seasonal time-scales and the main environmental factors, which drive succession, have remained less studied. Here, we analyzed absolute and relative proportions of a phytoplankton community during a 3-year period in Lake Erhai, a eutrophic highland lake in China. Alpha diversity and beta diversity, as measured by Shannon-Wiener and Bray-Curtis indices of taxonomic grouping and three functional groupings (FG, MFG, and MBFG) were applied to investigate environmental factors determining diversity. Significant, positive relationships were observed between taxonomic diversity and functional diversity that were strongly linked through seasons. In order to exclude the influence of dominant species' tolerance to extreme environments, the dominant species were excluded one by one, and the results showed that residual communities still exhibited similar patterns of succession. This synchronous temporal pattern was not principally driven by the dominant genera (Microcystis, Psephonema, and Mougeotia). Instead, the entire phytoplankton community assemblages were important in the pattern. Most diversity indices of taxonomic and functional groupings were significantly correlated with solar irradiance, but not nutrient concentrations. Because the lake is eutrophic and there were already sufficient nutrients available, additional nutrients had little effect on seasonal taxonomic and functional diversity of phytoplankton in Lake Erhai.
Collapse
Affiliation(s)
- Huan Wang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Dandan Zhao
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- Guangzhou Chengyi Aquaculture Co., Ltd., Guangzhou, China
| | - Liang Chen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an, China
| | - John P. Giesy
- Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, SK, Canada
- Department of Environmental Science, Baylor University, Waco, TX, United States
| | - Weizhen Zhang
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
| | - Changbo Yuan
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Leyi Ni
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Hong Shen
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Ping Xie
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| |
Collapse
|
7
|
Shi X, Li S, Li H, Chen F, Wu Q. The Community Structure of Picophytoplankton in Lake Fuxian, a Deep and Oligotrophic Mountain Lake. Front Microbiol 2019; 10:2016. [PMID: 31551958 PMCID: PMC6737998 DOI: 10.3389/fmicb.2019.02016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 08/19/2019] [Indexed: 12/26/2022] Open
Abstract
Spatial and seasonal dynamics of picophytoplankton were investigated by flow cytometry over a year in Lake Fuxian, a deep and oligotrophic mountain lake in southwest China. The contribution of picophytoplankton to the total Chl-a biomass and primary production were 50.1 and 66.1%, respectively. Picophytoplankton were mainly composed of phycoerythrin-rich picocyanobacteria (PE-cells) and photosynthetic picoeukaryotes (PPEs). PPEs were dominant in spring, reaching a maximum cell density of 3.0 × 104 cell mL–1, while PE-cells were prevalent in other seasons. PE-cell abundance was relatively similar throughout the year, except for a decrease in summer during the stratification period, when nutrient concentration was low. High-throughput sequencing results from the sorted samples revealed that Synechococcus was the major PE-cell type, while Chrysophyceae, Dinophyceae, Chlorophyceae, Eustigmatophyceae, and Prymnesiophyceae were equally important PPEs. In spring, PPEs were mainly composed of Chlorophyceae and Trebouxiophyceae, while in summer, their dominance was replaced by that of Chrysophyceae and Prymnesiophyceae. Eustigmatophyceae and Chlorophyceae became the major PPEs in autumn, and Dinophyceae became the most abundant in winter. Single cells of Microcystis were usually detected in summer in the south, suggesting the deterioration of the water quality in Lake Fuxian.
Collapse
Affiliation(s)
- Xiaoli Shi
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
| | - Shengnan Li
- Hunan Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha, China
| | - Huabing Li
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
| | - Feizhou Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
| | - Qinglong Wu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
| |
Collapse
|
8
|
Zhang Y, Peng C, Wang Z, Zhang J, Li L, Huang S, Li D. The Species-Specific Responses of Freshwater Diatoms to Elevated Temperatures Are Affected by Interspecific Interactions. Microorganisms 2018; 6:microorganisms6030082. [PMID: 30087310 PMCID: PMC6163879 DOI: 10.3390/microorganisms6030082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/30/2018] [Accepted: 08/03/2018] [Indexed: 11/29/2022] Open
Abstract
Numerous experimental simulations with different warming scenarios have been conducted to predict how algae will respond to warming, but their conclusions are sometimes contradictory to each other. This might be due to a failure to consider interspecific interactions. In this study, the dominant diatom species in a seasonal succession were isolated and verified to adapt to different temperature ranges by constant temperature experiment. Both unialgal and mixed cultures were exposed to two fluctuant temperature treatments that simulated the temperature variations from early spring to summer, with one treatment 4 °C higher (warming scenario) than the other. We found that the specific response of diatoms to warming was affected by interspecific interactions. Spring warming had no significant effect on eurythermal species and had a positive effect on the abundance of warm-adapted diatom species, but interspecific interactions reduced this promotional effect. Cold-adapted species had a negative response to spring warming in the presence of other diatom species but had a positive response to early spring warming in the absence of interspecific interactions. In addition, warming resulted in the growth of all diatom species peaking earlier in unialgal cultures, but this effect could be weakened or amplified by interspecies interactions in mixed cultures. Our results suggest that the specific diatom species with different optimal growth temperature ranges responding to warming were expected if there were no interspecific interactions. However, in natural environments, the inevitable and complex interspecific interactions will influence the responses of diatoms to warming. This important factor should not be ignored in the prediction of organism responses to climate warming.
Collapse
Affiliation(s)
- Yun Zhang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Chengrong Peng
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Zhicong Wang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Jinli Zhang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Lijie Li
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Shun Huang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Dunhai Li
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| |
Collapse
|
9
|
Zheng C, Lu KH, Xu Z, Zheng ZM, Zhu JY. [ Seasonal Succession of Phytoplankton Functional Groups and Their Driving Factors in the Siminghu Reservoir]. Huan Jing Ke Xue 2018; 39:2688-2697. [PMID: 29965624 DOI: 10.13227/j.hjkx.201709194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The succession of phytoplankton communities is affected by pure environmental factors as well as the interaction of various factors. Phytoplankton communities with eleven aquatic abiotic factors and four biotic factors were investigated in the Siminghu Reservoir, and the seasonal succession of phytoplankton FGs related to the biotic and abiotic factors was analyzed. The results suggested that a total of 22 phytoplankton functional groups were identified across the samples, and they were all affiliated with Chlorophyta and Bacillariophyta. An obvious seasonal succession was discovered by NMDS, which were present as D+Lo in summer, D+P+Lo in autumn and winter, and X2+P+MP in spring. In particular, we screened 10 functional groups with biomass significantly associated with the seasonal change in the phytoplankton community. A variance partitioning analysis (VPA) revealed that water temperature-zooplankton covariation and water temperature explained the variation in the phytoplankton functional groups throughout the year. A canonical correspondence analysis (CCA) showed that water temperature, transparency, nitrate nitrogen, and the biomass of zooplankton were the most critical factors determining the community dynamics of phytoplankton.
Collapse
Affiliation(s)
- Cheng Zheng
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, School of Marine Science, Ningbo University, Ningbo 315211, China
| | - Kai-Hong Lu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, School of Marine Science, Ningbo University, Ningbo 315211, China
| | - Zhen Xu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, School of Marine Science, Ningbo University, Ningbo 315211, China
| | - Zhong-Ming Zheng
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, School of Marine Science, Ningbo University, Ningbo 315211, China
| | - Jin-Yong Zhu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, School of Marine Science, Ningbo University, Ningbo 315211, China
| |
Collapse
|
10
|
Yamamoto Y, Shiah FK. FACTORS RELATED TO THE DOMINANCE OF CYLINDROSPERMOPSIS RACIBORSKII (CYANOBACTERIA) IN A SHALLOW POND IN NORTHERN TAIWAN(1). J Phycol 2012; 48:984-991. [PMID: 27009008 DOI: 10.1111/j.1529-8817.2012.01184.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Seasonal succession of phytoplankton was investigated in a shallow pond in northern Taiwan from August 2009 to January 2011, with particular reference to the dynamics of Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju. The abundances of the representative species in the pond increased during high-temperature seasons, whereas only C. raciborskii became dominant in the pond from summer to autumn in both 2009 and 2010. The high shade tolerance of C. raciborskii was likely one of the factors that enabled the cyanobacterium to grow during the summer when the transparency was low. Moreover, the heterocyst production of C. raciborskii was enhanced during summer when the concentration of dissolved inorganic nitrogen was low, implying that nitrogen fixation also played an important role in supporting the growth of C. raciborskii. Autumnal rainfall was a critical factor in the collapse of C. raciborskii blooms. C. raciborskii formed blooms with relatively small trichomes, whereas larger trichomes dominated during winter. The dependence of the trade-off between growth rate and trichome size on temperature was assumed to be an adaptation strategy of C. raciborskii.
Collapse
Affiliation(s)
- Yoshimasa Yamamoto
- Research Center for Environmental Changes, Academia Sinica, Taipei 11529, Taiwan
| | - Fuh-Kwo Shiah
- Research Center for Environmental Changes, Academia Sinica, Taipei 11529, Taiwan
| |
Collapse
|
11
|
Andrushchyshyn O, Magnusson AK, Williams DD. Ciliate populations in temporary freshwater ponds: seasonal dynamics and influential factors. Freshw Biol 2003; 48:548-564. [PMID: 32390671 PMCID: PMC7202314 DOI: 10.1046/j.1365-2427.2003.01028.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/15/2002] [Indexed: 05/27/2023]
Abstract
SUMMARY 1. The ciliate populations of two temporary ponds in southern Ontario were studied throughout their aquatic phases in 2001. Pond I (∼1 ha) held water for 98 days, whereas Pond II (∼0.25 ha) held water for 34 days. Populations were assessed both within the ponds themselves and within a series of enclosures in which invertebrate predator pressure was manipulated. 2. In the natural pond water, total ciliate abundance in Pond II rose rapidly from day 1 increasing two orders of magnitude by day 7. In contrast, total abundance in Pond I began at the same level as in Pond II but increased much more slowly, reached a plateau of around 500 individuals L-1, and increased again late in the hydroperiod. 3. Despite being only 500 m apart, the two ponds were fairly dissimilar in terms of their species richness and species composition. Pond I contained 50 species compared with 70 species for Pond II, with only 24 species shared. Additional species occurred within the enclosures raising the total species richness to 145 species; 88 from Pond I, 104 from Pond II, with 47 species (30%) in common. Pond II contained more mid-sized ciliates (50-200 μm), whereas Pond I was dominated by smaller ciliates, especially in mid-May and early June. In Pond I, cumulative species richness throughout the hydroperiod was highest in the predator addition enclosures (65 ± 4 species), followed by the partial-predator exclusion enclosures (50 ± 4). Lowest species richness was found in the control enclosures (39 ± 2) and in the pondwater controls (39 ± 0). Differences between the ciliates in the natural pond water and the enclosures appeared to be related to a greater concentration of phytoplankton within the enclosures (perhaps resulting from extensive growth of duckweed, Lemna, outside), and higher densities of zooplankters in the pond. 4. The physicochemical environment influenced species richness, total abundance and the number of rare species (27 in Pond II versus 13 in Pond I). Variation in ciliate abundance in Pond I could be explained by the number of days after filling (39%) and enclosure treatment (23%). These two parameters also explained 72% of the variation in species richness in Pond I (46 and 26%, respectively). Sixty-five per cent of the variation in abundance in Pond II could be explained by the measured parameters: number of days after filling 27%, pH 19%, and nitrate levels 12%. Fifty-two per cent of the variation in species richness was explained by the environmental parameters, of which pH was the most influential. Species succession was a strong feature of both ponds and its relationship to environmental variables and the presence of other organisms is discussed. 5. Addition of invertebrate predators resulted in higher abundance and higher species richness for a limited time period in one of the ponds - suggesting that differences in foodweb dynamics may influence ciliate community composition.
Collapse
Affiliation(s)
- Oksana Andrushchyshyn
- Surface and Groundwater Ecology Research Group, Division of Life Sciences, University of Toronto at Scarborough, Ontario, Canada
| | - A Katarina Magnusson
- Surface and Groundwater Ecology Research Group, Division of Life Sciences, University of Toronto at Scarborough, Ontario, Canada
| | - D Dudley Williams
- Surface and Groundwater Ecology Research Group, Division of Life Sciences, University of Toronto at Scarborough, Ontario, Canada
| |
Collapse
|