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Amaral DC, Dunck B, Braghin LSM, Fernandes UL, Bomfim FF, Bonecker CC, Lansac-Tôha FA. Predation by an omnivorous fish and food availability alter zooplankton functional diversity: a microcosm approach. AN ACAD BRAS CIENC 2021; 93:e20200778. [PMID: 34431864 DOI: 10.1590/0001-3765202120200778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 03/17/2021] [Indexed: 11/22/2022] Open
Abstract
Studies considering the functional traits of organisms, populations, and communities functional indices increase the understanding of many factors on ecosystem functioning. Here, we analyze the predation effect (by fish) on zooplankton functional diversity and the effects of biomass and density of periphytic algae on zooplankton feeding type trait and body size. We expect that intense predation by fish on zooplankton leads to higher values of zooplankton functional diversity and that food resource will be positively related to the abundance of zooplankton trait and body size. For that, microcosms were established (T1- fish-absence, and T2- fish-presence, both with periphytic algae as food). We observed that fish presence decreased zooplankton functional diversity through modifications in the availability of nutrients and algae, through the middle-out effect. We also observed that body size had a negative relationship with the food resource, reaffirming that high food availability in subtropical lakes is linked to small-bodied zooplankton. The raptorial copepods covariate positively with the periphytic algae, which was an alternative food resource and, in this case, the main form of carbon input into the system. In this study, omnivorous fish reduced zooplankton functional traits, which can alter the energy stock and energy flow in aquatic ecosystems.
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Affiliation(s)
- Diogo C Amaral
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Núcleo de Pesquisa em Limnologia, Ictiologia e Aquicultura, Av. Colombo, 5790, Campus Universitário, 87020-900 Maringá, PR, Brazil
| | - Bárbara Dunck
- Universidade Federal Rural da Amazônia/UFRA, Instituto Socioambiental e dos Recursos Hídricos/ISARH, campus Belém, Avenida Perimetral, de 1501/1502 a 5004/5005, 66077-830 Belém, PA, Brazil.,Programa de Pós-Graduação em Ecologia/PPGECO, Universidade Federal do Pará, Rua Augusto Corrêa, 01, campus Guamá, 66075-110 Belém, PA, Brazil
| | - Louizi S M Braghin
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Núcleo de Pesquisa em Limnologia, Ictiologia e Aquicultura, Av. Colombo, 5790, Campus Universitário, 87020-900 Maringá, PR, Brazil
| | - Ubirajara L Fernandes
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Núcleo de Pesquisa em Limnologia, Ictiologia e Aquicultura, Av. Colombo, 5790, Campus Universitário, 87020-900 Maringá, PR, Brazil
| | - Francieli F Bomfim
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Núcleo de Pesquisa em Limnologia, Ictiologia e Aquicultura, Av. Colombo, 5790, Campus Universitário, 87020-900 Maringá, PR, Brazil
| | - Cláudia C Bonecker
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Núcleo de Pesquisa em Limnologia, Ictiologia e Aquicultura, Av. Colombo, 5790, Campus Universitário, 87020-900 Maringá, PR, Brazil
| | - Fábio A Lansac-Tôha
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Núcleo de Pesquisa em Limnologia, Ictiologia e Aquicultura, Av. Colombo, 5790, Campus Universitário, 87020-900 Maringá, PR, Brazil
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Sabbagh EI, Huete-Stauffer TM, Calleja MLL, Silva L, Viegas M, Morán XAG. Weekly variations of viruses and heterotrophic nanoflagellates and their potential impact on bacterioplankton in shallow waters of the central Red Sea. FEMS Microbiol Ecol 2020; 96:5800985. [PMID: 32149360 PMCID: PMC7104677 DOI: 10.1093/femsec/fiaa033] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 03/08/2020] [Indexed: 11/14/2022] Open
Abstract
Bacterioplankton play a pivotal role in marine ecosystems. However, their temporal dynamics and underlying control mechanisms are poorly understood in tropical regions such as the Red Sea. Here, we assessed the impact of bottom-up (resource availability) and top-down (viruses and heterotrophic nanoflagellates) controls on bacterioplankton abundances by weekly sampling a coastal central Red Sea site in 2017. We monitored microbial abundances by flow cytometry together with a set of environmental variables including temperature, salinity, dissolved organic and inorganic nutrients and chlorophyll a. We distinguished five groups of heterotrophic bacteria depending on their physiological properties relative nucleic acid content, membrane integrity and cell-specific respiratory activity, two groups of Synechococcus cyanobacteria and three groups of viruses. Viruses controlled heterotrophic bacteria for most of the year, as supported by a negative correlation between their respective abundances and a positive one between bacterial mortality rates and mean viral abundances. On the contrary, heterotrophic nanoflagellates abundance covaried with that of heterotrophic bacteria. Heterotrophic nanoflagellates showed preference for larger bacteria from both the high and low nucleic acid content groups. Our results demonstrate that top-down control is fundamental in keeping heterotrophic bacterioplankton abundances low (< 5 × 10 5 cells mL−1) in Red Sea coastal waters.
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Affiliation(s)
- Eman I Sabbagh
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Kingdom of Saudi Arabia
| | - Tamara M Huete-Stauffer
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Kingdom of Saudi Arabia
| | - Maria L L Calleja
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Kingdom of Saudi Arabia.,Max Planck Institute for Chemistry, Hahn-Meitner Weg 1, 55128 Mainz, Germany
| | - Luis Silva
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Kingdom of Saudi Arabia
| | - Miguel Viegas
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Kingdom of Saudi Arabia
| | - Xosé Anxelu G Morán
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Kingdom of Saudi Arabia
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Moresco GA, Bortolini JC, Rodrigues LC, Jati S, Machado Velho LF. A functional deconstructive approach to mixotrophic phytoplankton responds better to local, regional and biogeographic predictors than species. AUSTRAL ECOL 2019. [DOI: 10.1111/aec.12852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Geovani Arnhold Moresco
- Programa de Pós-graduação em Ecologia de Ambientes Continentais; Universidade Estadual de Maringá; Maringá PR Brazil
| | - Jascieli Carla Bortolini
- Departamento de Botânica; Universidade Federal de Goiás; ICB; Avenida Esperança, s/n 74690-900 Goiânia GO Brazil
| | - Luzia Cleide Rodrigues
- Programa de Pós-graduação em Ecologia de Ambientes Continentais; Universidade Estadual de Maringá; Maringá PR Brazil
- Núcleo de Pesquisas em Limnologia; Ictiologia e Aquicultura; Universidade Estadual de Maringá; Avenida Colombo; 5790, Bloco H-90, Sala 23 87020-900 Maringá PR Brazil
| | - Susicley Jati
- Núcleo de Pesquisas em Limnologia; Ictiologia e Aquicultura; Universidade Estadual de Maringá; Avenida Colombo; 5790, Bloco H-90, Sala 23 87020-900 Maringá PR Brazil
| | - Luiz Felipe Machado Velho
- Programa de Pós-graduação em Ecologia de Ambientes Continentais; Universidade Estadual de Maringá; Maringá PR Brazil
- Núcleo de Pesquisas em Limnologia; Ictiologia e Aquicultura; Universidade Estadual de Maringá; Avenida Colombo; 5790, Bloco H-90, Sala 23 87020-900 Maringá PR Brazil
- Programa de Pós-Graduação em Tecnologias Limpas (PPGTL); Centro Universitário de Maringá; Avenida Guedner, 1610 Maringá 87050-390 Brazil
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Morán XAG, Calvo-Díaz A, Arandia-Gorostidi N, Huete-Stauffer TM. Temperature sensitivities of microbial plankton net growth rates are seasonally coherent and linked to nutrient availability. Environ Microbiol 2018; 20:3798-3810. [PMID: 30159999 DOI: 10.1111/1462-2920.14393] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 08/24/2018] [Indexed: 11/27/2022]
Abstract
Recent work suggests that temperature effects on marine heterotrophic bacteria are strongly seasonal, but few attempts have been made to concurrently assess them across trophic levels. Here, we estimated the temperature sensitivities (using activation energies, E) of autotrophic and heterotrophic microbial plankton net growth rates over an annual cycle in NE Atlantic coastal waters. Phytoplankton grew in winter and late autumn (0.41 ± 0.16 SE d-1 ) and decayed in the remaining months (-0.42 ± 0.10 d-1 ). Heterotrophic microbes shared a similar seasonality, with positive net growth for bacteria (0.14-1.48 d-1 ), while nanoflagellates had higher values (> 0.4 d-1 ) in winter and spring relative to the rest of the year (-0.46 to 0.29 d-1 ). Net growth rates activation energies showed similar dynamics in the three groups (-1.07 to 1.51 eV), characterized by maxima in winter, minima in summer and resumed increases in autumn. Microbial plankton E values were significantly correlated with nitrate concentrations as a proxy for nutrient availability. Nutrient-sufficiency (i.e., > 1 μmol l-1 nitrate) resulted in significantly higher activation energies of phytoplankton and heterotrophic nanoflagellates relative to nutrient-limited conditions. We suggest that only within spatio-temporal windows of both moderate bottom-up and top-down controls will temperature have a major enhancing effect on microbial growth.
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Affiliation(s)
- Xosé Anxelu G Morán
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Saudi Arabia
| | - Alejandra Calvo-Díaz
- Centro Oceanográfico de Gijón/Xixón, Instituto Español de Oceanografía (IEO), Gijón/Xixón, Spain
| | - Nestor Arandia-Gorostidi
- Centro Oceanográfico de Gijón/Xixón, Instituto Español de Oceanografía (IEO), Gijón/Xixón, Spain.,Department of Earth System Science, Stanford University, Stanford, CA, USA
| | - Tamara Megan Huete-Stauffer
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center, Biological and Environmental Sciences and Engineering Division, Thuwal, Saudi Arabia.,Centro Oceanográfico de Gijón/Xixón, Instituto Español de Oceanografía (IEO), Gijón/Xixón, Spain
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Krylov AV, Kosolapov DB, Kosolapova NG, Hovsepyan AA, Gerasimov YV. The Plankton Community of Sevan Lake (Armenia) after Invasion of Daphnia (Ctenodaphnia) magna Straus, 1820. BIOL BULL+ 2018. [DOI: 10.1134/s1062359018050084] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Domingues CD, da Silva LHS, Rangel LM, de Magalhães L, de Melo Rocha A, Lobão LM, Paiva R, Roland F, Sarmento H. Microbial Food-Web Drivers in Tropical Reservoirs. MICROBIAL ECOLOGY 2017; 73:505-520. [PMID: 27900461 DOI: 10.1007/s00248-016-0899-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 11/13/2016] [Indexed: 06/06/2023]
Abstract
Element cycling in aquatic systems is driven chiefly by planktonic processes, and the structure of the planktonic food web determines the efficiency of carbon transfer through trophic levels. However, few studies have comprehensively evaluated all planktonic food-web components in tropical regions. The aim of this study was to unravel the top-down controls (metazooplankton community structure), bottom-up controls (resource availability), and hydrologic (water residence time) and physical (temperature) variables that affect different components of the microbial food web (MFW) carbon stock in tropical reservoirs, through structural equation models (SEM). We conducted a field study in four deep Brazilian reservoirs (Balbina, Tucuruí, Três Marias, and Funil) with different trophic states (oligo-, meso-, and eutrophic). We found evidence of a high contribution of the MFW (up to 50% of total planktonic carbon), especially in the less-eutrophic reservoirs (Balbina and Tucuruí). Bottom-up and top-down effects assessed through SEM indicated negative interactions between soluble reactive phosphorus and phototrophic picoplankton (PPP), dissolved inorganic nitrogen, and heterotrophic nanoflagellates (HNF). Copepods positively affected ciliates, and cladocerans positively affected heterotrophic bacteria (HB) and PPP. Higher copepod/cladoceran ratios and an indirect positive effect of copepods on HB might strengthen HB-HNF coupling. We also found low values for the degree of uncoupling (D) and a low HNF/HB ratio compared with literature data (mostly from temperate regions). This study demonstrates the importance of evaluating the whole size spectrum (including microbial compartments) of the different planktonic compartments, in order to capture the complex carbon dynamics of tropical aquatic ecosystems.
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Affiliation(s)
- Carolina Davila Domingues
- Museu Nacional, Laboratório de Ficologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 20940-040, Brazil.
| | | | - Luciana Machado Rangel
- Museu Nacional, Laboratório de Ficologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 20940-040, Brazil
| | - Leonardo de Magalhães
- Museu Nacional, Laboratório de Ficologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 20940-040, Brazil
| | - Adriana de Melo Rocha
- Laboratório de Limnologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21940-590, Brazil
| | - Lúcia Meirelles Lobão
- Laboratório de Ecologia Aquática, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, 36036-900, Brazil
| | - Rafael Paiva
- Laboratório de Ecologia Aquática, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, 36036-900, Brazil
| | - Fábio Roland
- Laboratório de Ecologia Aquática, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, 36036-900, Brazil
| | - Hugo Sarmento
- Departamento de Hidrobiologia, Laboratório de Processos Microbianos e Biodiversidade, Universidade Federal de São Carlos, São Carlos, 13565-905, Brazil
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