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Kiørboe T. Organismal trade-offs and the pace of planktonic life. Biol Rev Camb Philos Soc 2024. [PMID: 38855937 DOI: 10.1111/brv.13108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 05/27/2024] [Accepted: 05/29/2024] [Indexed: 06/11/2024]
Abstract
No one is perfect, and organisms that perform well in some habitat or with respect to some tasks, do so at the cost of performance in others: there are inescapable trade-offs. Organismal trade-offs govern the structure and function of ecosystems and attempts to demonstrate and quantify trade-offs have therefore been an important goal for ecologists. In addition, trade-offs are a key component in trait-based ecosystem models. Here, I synthesise evidence of trade-offs in plankton organisms, from bacteria to zooplankton, and show how a slow-fast gradient in life histories emerges. I focus on trade-offs related to the main components of an organism's Darwinian fitness, that is resource acquisition, survival, and propagation. All consumers need to balance the need to eat without being eaten, and diurnal vertical migration, where zooplankton hide at depth during the day to avoid visual predators but at the cost of missed feeding opportunities in the productive surface layer, is probably the best documented result of this trade-off. However, there are many other more subtle but equally important behaviours that similarly are the result of an optimisation of these trade-offs. Most plankton groups have also developed more explicit defence mechanisms, such as toxin production or evasive behaviours that are harnessed in the presence of their predators; the costs of these have often proved difficult to quantify or even demonstrate, partly because they only materialise under natural conditions. Finally, all multicellular organisms must allocate time and resources among growth, reproduction, and maintenance (e.g. protein turnover and DNA repair), and mate finding may compromise both survival and feeding. The combined effects of all these trade-offs is the emergence of a slow-fast gradient in the pace-of-life, likely the most fundamental principle for the organisation of organismal life histories. This crystallisation of trade-offs may offer a path to further simplification of trait-based models of marine ecosystems.
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Affiliation(s)
- Thomas Kiørboe
- Centre for Ocean Life, DTU Aqua, Technical University of Denmark, 2800 Kgs, Kemitorvet, Kgs. Lyngby, Denmark
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2
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Fathy RF. Divergent perspectives on the synergistic impacts of thermal-chemical stress on aquatic biota within the framework of climate change scenarios. CHEMOSPHERE 2024; 355:141810. [PMID: 38554872 DOI: 10.1016/j.chemosphere.2024.141810] [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: 01/25/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/02/2024]
Abstract
Climate change, including global warming, leads to rising temperatures in aquatic ecosystems, which is one of the numerous repercussions it brings. Furthermore, water warming can indirectly impact aquatic organisms by modifying the toxicity levels of pollutants. Nevertheless, numerous studies have explored the potential impacts of chemical stress on aquatic biota, but little is known about how such chemicals and toxins interact with climate change factors, especially elevated temperatures. As such, this review paper focuses on exploring the potential effects of thermochemical stress on a wide sector of aquatic organisms, including aquatic vertebrates and invertebrates, in various aquatic ecosystems (freshwater and marine systems). Herein, the objective of this study is to explore the most up-to-date the impact of water warming (without chemical stress) and thermochemical stress on various biochemical and physiological processes in aquatic fauna and how this greatly affects biodiversity and sustainability. Therefore, there is a growing need to understand and evaluate this synergistic mechanism and its potential hazardous impacts. However, we need further investigations and scientific reports to address this serious environmental issue in order to confront anthropogenic pollutants regarding climate change and chemical pollution risks in the near future and subsequently find sustainable solutions for them.
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Affiliation(s)
- Ragaa F Fathy
- Hydrobiology Department, Veterinary Research Institute, National Research Centre (NRC), 33 El-Buhouth St, 12622 Dokki, Giza, Egypt.
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3
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Roberts AJ, Suttle CA. Pathogens and Passengers: Roles for Crustacean Zooplankton Viruses in the Global Ocean. Microorganisms 2023; 11:microorganisms11041054. [PMID: 37110477 PMCID: PMC10142142 DOI: 10.3390/microorganisms11041054] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/28/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
Viruses infect all living organisms, but the viruses of most marine animals are largely unknown. Crustacean zooplankton are a functional lynchpin in marine food webs, but very few have been interrogated for their associated viruses despite the profound potential effects of viral infection. Nonetheless, it is clear that the diversity of viruses in crustacean zooplankton is enormous, including members of all realms of RNA viruses, as well as single- and double-stranded DNA viruses, in many cases representing deep branches of viral evolution. As there is clear evidence that many of these viruses infect and replicate in zooplankton species, we posit that viral infection is likely responsible for a significant portion of unexplained non-consumptive mortality in this group. In turn, this infection affects food webs and alters biogeochemical cycling. In addition to the direct impacts of infection, zooplankton can vector economically devastating viruses of finfish and other crustaceans. The dissemination of these viruses is facilitated by the movement of zooplankton vertically between epi- and mesopelagic communities through seasonal and diel vertical migration (DVM) and across long distances in ship ballast water. The large potential impact of viruses on crustacean zooplankton emphasises the need to clearly establish the relationships between specific viruses and the zooplankton they infect and investigate disease and mortality for these host-virus pairs. Such data will enable investigations into a link between viral infection and seasonal dynamics of host populations. We are only beginning to uncover the diversity and function of viruses associated with crustacean zooplankton.
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Affiliation(s)
- Alastair J Roberts
- Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Curtis A Suttle
- Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Department of Botany, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
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4
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Berasategui AA, Calliari DL, Amodeo M, Spetter CV, Guinder V, Biancalana F. Interannual changes in winter-spring zooplankton estuarine community forced by hydroclimatic variability - With special reference to bioindicator species Eurytemora americana. MARINE ENVIRONMENTAL RESEARCH 2023; 186:105898. [PMID: 36780804 DOI: 10.1016/j.marenvres.2023.105898] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Climatic variability and anthropogenic pressures impact the structure and dynamics of pelagic ecosystems and copepods are good indicators of such changes. This investigation aims to explore the interannual pattern of the mesozooplankton community, in relation to environmental variables in the Bahía Blanca Estuary during winter-spring from last two decades focusing on the dominant species Eurytemora americana. Main changes recorded include increased temperature, alteration of the nutrient balance, a decrease in chlorophyll-a, modifications in the abundance-structure of the phytoplankton assemblages, and changes in the abundance-structure of the mesozooplankton community. A significant decrease was observed in species richness of the mesozooplankton over time. Alterations in abundance and reproductive traits of E. americana, were also found. The population of E. americana dropped from mean relative abundance of 47% in first years to 20-12% in lasts one, accompanied with an increase of copepod species characterized by higher trophic plasticity in eutrophic conditions, like Acartia tonsa and Euterpina acutifrons.
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Affiliation(s)
- A A Berasategui
- Instituto Argentino de Oceanografía (IADO-UNS-CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Camino La Carrindanga Km 7.5, B8000FWB, Bahía Blanca, Argentina.
| | - D L Calliari
- Facultad de Ciencias, Universidad de la República, Iguá 4225, CP 11400, Montevideo, Uruguay
| | - M Amodeo
- Instituto Argentino de Oceanografía (IADO-UNS-CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Camino La Carrindanga Km 7.5, B8000FWB, Bahía Blanca, Argentina
| | - C V Spetter
- Instituto Argentino de Oceanografía (IADO-UNS-CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Camino La Carrindanga Km 7.5, B8000FWB, Bahía Blanca, Argentina; Departamento de Química, Universidad Nacional del Sur, Av. Alem 1253, 8000, Bahía Blanca, Argentina
| | - V Guinder
- Instituto Argentino de Oceanografía (IADO-UNS-CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Camino La Carrindanga Km 7.5, B8000FWB, Bahía Blanca, Argentina
| | - F Biancalana
- Instituto Argentino de Oceanografía (IADO-UNS-CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Camino La Carrindanga Km 7.5, B8000FWB, Bahía Blanca, Argentina
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5
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Zhang Z, Chen H, Li Y, Ge R, Liu G, Ali S, Zhuang Y. Trait-based approach revealed the seasonal variation of mesozooplankton functional groups in the South Yellow Sea. MARINE LIFE SCIENCE & TECHNOLOGY 2023; 5:126-140. [PMID: 37073327 PMCID: PMC10077163 DOI: 10.1007/s42995-022-00156-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 11/10/2022] [Indexed: 05/03/2023]
Abstract
Functional traits determine the fitness of organisms and mirror their ecological functions. Although trait-based approaches provide ecological insights, it is underexploited for marine zooplankton, particularly with respect to seasonal variation. Here, based on four major functional traits, including body length, feeding type, trophic group, and reproduction mode, we quantified the seasonal variations of mesozooplankton functional groups in the South Yellow Sea (SYS) in the spring, summer, and autumn of 2018. Strong seasonal dynamics were identified for all traits but patterns varied among traits. Small zooplankton (47.7-88.6%), omnivores-herbivores (81.3-97.6%), and free spawners (54.8-92.5%) dominated in three seasons, while ambush feeders and current feeders dominated in spring (45.7%), and autumn (73.4%), respectively. Cluster analysis of the functional traits showed that the mesozooplankton in the SYS can be classified into eight functional groups. The biogeographic and seasonal variations of functional groups can be partially explained by environmental drivers. Group 1, represented by omnivores-herbivores, was the most dominant functional group, the abundance of which peaked in spring and was positively correlated with chlorophyll a concentration, indicating its close association with phytoplankton dynamics. The contribution of giant, active ambush carnivores, passive ambush carnivore jellyfish, current omnivores-detritivores, and parthenogenetic cladocerans increased with sea surface temperature. The proportion of giant, active ambush carnivores and active ambush omnivore-carnivore copepods decreased with salinity in autumn. This study presents a new perspective for understanding the dynamics of zooplankton and paves the way for further research on the functional diversity of zooplankton in the SYS. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-022-00156-9.
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Affiliation(s)
- Zhishuang Zhang
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
| | - Hongju Chen
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
- Marine Ecology and Environmental Science Laboratory, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266200 China
| | - Yixuan Li
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
| | - Ruping Ge
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
| | - Guangxing Liu
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
- Marine Ecology and Environmental Science Laboratory, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266200 China
| | - Shaukat Ali
- Department of Environmental Sciences, Karakoram International University, Gilgit, 15100 Pakistan
| | - Yunyun Zhuang
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
- Marine Ecology and Environmental Science Laboratory, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266200 China
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6
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Orenstein EC, Ayata S, Maps F, Becker ÉC, Benedetti F, Biard T, de Garidel‐Thoron T, Ellen JS, Ferrario F, Giering SLC, Guy‐Haim T, Hoebeke L, Iversen MH, Kiørboe T, Lalonde J, Lana A, Laviale M, Lombard F, Lorimer T, Martini S, Meyer A, Möller KO, Niehoff B, Ohman MD, Pradalier C, Romagnan J, Schröder S, Sonnet V, Sosik HM, Stemmann LS, Stock M, Terbiyik‐Kurt T, Valcárcel‐Pérez N, Vilgrain L, Wacquet G, Waite AM, Irisson J. Machine learning techniques to characterize functional traits of plankton from image data. LIMNOLOGY AND OCEANOGRAPHY 2022; 67:1647-1669. [PMID: 36247386 PMCID: PMC9543351 DOI: 10.1002/lno.12101] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 04/21/2022] [Accepted: 04/27/2022] [Indexed: 06/16/2023]
Abstract
Plankton imaging systems supported by automated classification and analysis have improved ecologists' ability to observe aquatic ecosystems. Today, we are on the cusp of reliably tracking plankton populations with a suite of lab-based and in situ tools, collecting imaging data at unprecedentedly fine spatial and temporal scales. But these data have potential well beyond examining the abundances of different taxa; the individual images themselves contain a wealth of information on functional traits. Here, we outline traits that could be measured from image data, suggest machine learning and computer vision approaches to extract functional trait information from the images, and discuss promising avenues for novel studies. The approaches we discuss are data agnostic and are broadly applicable to imagery of other aquatic or terrestrial organisms.
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Affiliation(s)
- Eric C. Orenstein
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de VillefrancheVillefranche‐sur‐MerFrance
| | - Sakina‐Dorothée Ayata
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de VillefrancheVillefranche‐sur‐MerFrance
- Sorbonne Université, Laboratoire d'Océanographie et du Climat, Institut Pierre Simon Laplace (LOCEAN‐IPSL, SU/CNRS/IRD/MNHN)ParisFrance
| | - Frédéric Maps
- Département de BiologieUniversité LavalQuébecCanada
- Takuvik Joint International Laboratory Université Laval‐CNRS (UMI 3376), Québec‐Océan, Université LavalQuébecCanada
| | - Érica C. Becker
- Universidade Federal de Santa Catarina (UFSC)FlorianópolisSanta CatarinaBrazil
| | - Fabio Benedetti
- ETH ZürichInstitute of Biogeochemistry and Pollutant DynamicsZürichSwitzerland
| | - Tristan Biard
- Laboratoire d'Océanologie et de GéosciencesUniversité du Littoral Côte d'Opale, Université de Lille, CNRS, UMR 8187WimereuxFrance
| | | | - Jeffrey S. Ellen
- Scripps Institution of Oceanography, University of California San DiegoLa JollaCalifornia
| | - Filippo Ferrario
- Département de BiologieUniversité LavalQuébecCanada
- Takuvik Joint International Laboratory Université Laval‐CNRS (UMI 3376), Québec‐Océan, Université LavalQuébecCanada
- Department of Fisheries and OceansMaurice Lamontagne InstituteMont‐JoliQuébecCanada
| | | | - Tamar Guy‐Haim
- National Institute of Oceanography, Israel Oceanographic and Limnological ResearchHaifaIsrael
| | - Laura Hoebeke
- KERMIT, Department of Data Analysis and Mathematical ModellingGhent UniversityGhentBelgium
| | | | - Thomas Kiørboe
- Centre for Ocean Life, DTU‐AquaTechnical University of DenmarkKongens LyngbyDenmark
| | | | - Arancha Lana
- Institut Mediterrani d'Estudis Avançats (IMEDEA, UIB‐CSIC)Balearic IslandsSpain
| | | | - Fabien Lombard
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de VillefrancheVillefranche‐sur‐MerFrance
| | | | - Séverine Martini
- Aix Marseille University, Université de Toulon, CNRS, IRD, MIO UMMarseilleFrance
| | - Albin Meyer
- Université de Lorraine, CNRS, LIECMetzFrance
| | - Klas Ove Möller
- Helmholtz‐Zentrum HereonInstitute of Carbon CycleGeesthachtGermany
| | - Barbara Niehoff
- Alfred Wegener Institute for Polar and Marine ResearchBremerhavenGermany
| | - Mark D. Ohman
- Scripps Institution of Oceanography, University of California San DiegoLa JollaCalifornia
| | | | - Jean‐Baptiste Romagnan
- IFREMER, Centre Atlantique, Laboratoire Ecologie et Modèles pour l'Halieutique (EMH)Unité HALGO, UMR DECODNantesFrance
| | | | - Virginie Sonnet
- Graduate School of OceanographyUniversity of Rhode IslandNarragansettRhode Island
| | - Heidi M. Sosik
- Woods Hole Oceanographic InstitutionWoods HoleMassachusetts
| | - Lars S. Stemmann
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de VillefrancheVillefranche‐sur‐MerFrance
| | - Michiel Stock
- KERMIT, Department of Data Analysis and Mathematical ModellingGhent UniversityGhentBelgium
| | - Tuba Terbiyik‐Kurt
- Department of Basic SciencesCukurova University, Faculty of FisheriesAdanaTurkey
| | | | - Laure Vilgrain
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de VillefrancheVillefranche‐sur‐MerFrance
| | | | - Anya M. Waite
- Ocean Frontier Institute, Dalhousie UniversityHalifaxNova ScotiaCanada
| | - Jean‐Olivier Irisson
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de VillefrancheVillefranche‐sur‐MerFrance
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Effects of temperature and phytoplankton community composition on subitaneous and resting egg production rates of Acartia omorii in Tokyo Bay. Sci Rep 2021; 11:7959. [PMID: 33846414 PMCID: PMC8041874 DOI: 10.1038/s41598-021-86976-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/23/2021] [Indexed: 02/01/2023] Open
Abstract
To clarify the effects of temperature and phytoplankton community composition on Acartia omorii (Copepoda: Calanoida) egg production, its abundance and egg production rates were investigated from 2016 to 2018 in Tokyo Bay, Japan. Abundance was high from March to May (> 3.0 × 104 individuals m-3) and low or undetected from late June to December (≤ 0.4 × 104 individuals m-3). In 2018, most eggs were subitaneous until April; diapause eggs appeared in May when the water temperature exceeded 20 °C. The weight-specific egg production rate (SEPR, Cegg Cfemale-1 day-1) had two peaks. In the first peak in January, > 90% of eggs were subitaneous; in contrast, in the second peak in May, 60% of eggs were unhatched, including diapause eggs. The first peak of subitaneous eggs may contribute to planktonic population development from March to May. In contrast the second peak of diapause eggs probably enhances their recurrence in the next winter. Multiple regression analysis revealed that subitaneous SEPR showed a negative response, whereas diapause SEPR showed a positive response to temperature. Subitaneous SEPR positively correlated with the proportion of small diatoms in phytoplankton carbon biomass, whereas unhatched SEPR positively correlated with the proportion of inedible preys in large diatoms and dinoflagellates. Edible diatoms may induce subitaneous egg production, whereas low-food availability may induce diapause egg production. These results suggest that phytoplankton composition and water temperature have strong impacts on the dynamics of A. omorii via egg production.
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Dinh KV, Nguyen QTT, Vo TMC, Bui TB, Dao TS, Tran DM, Doan NX, Truong TSH, Wisz MS, Nielsen TG, Vu MTT, Le MH. Interactive effects of extreme temperature and a widespread coastal metal contaminant reduce the fitness of a common tropical copepod across generations. MARINE POLLUTION BULLETIN 2020; 159:111509. [PMID: 32763562 DOI: 10.1016/j.marpolbul.2020.111509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
Tropical coastal areas are increasingly exposed to temperature extremes from marine heatwaves and contaminants from anthropogenic activities. The interactive effects of these environmental changes on marine life are understudied. We investigated the direct and cross-generational effects of copper (Cu) on F0 and F1 generations of the common tropical copepod Pseudodiaptomus annandalei under extreme temperatures (30 and 34 °C). In F0, Cu exposure reduced survival and nauplii production; these patterns were more pronounced at 34 °C and in females. F0 Copepods produced more faecal pellets at 34 °C than 30 °C, indicating a higher energetic demand. In F1, the number of F1 adults was lower in CuF0 and at 34 °C. Cu-exposed F0 produced larger adult F1, while exposure to 34 °C resulted in smaller adult F1. Our results show that tropical copepods are highly vulnerable to the interactive effects of contaminants and extreme temperatures.
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Affiliation(s)
- Khuong V Dinh
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture, Nha Trang University, No 2 Nguyen Dinh Chieu Street, Nha Trang City, Viet Nam.
| | - Quyen T T Nguyen
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture, Nha Trang University, No 2 Nguyen Dinh Chieu Street, Nha Trang City, Viet Nam
| | - Thi-My-Chi Vo
- Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam
| | - Trung Ba Bui
- Institute for Environment and Resources, Vietnam National University - Hochiminh City, 142 To Hien Thanh St., Dist. 10, Hochiminh City, Viet Nam
| | - Thanh-Son Dao
- Hochiminh City University of Technology, VNU - HCM, Hochiminh City, Viet Nam
| | - Duc M Tran
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture, Nha Trang University, No 2 Nguyen Dinh Chieu Street, Nha Trang City, Viet Nam
| | - Nam X Doan
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture, Nha Trang University, No 2 Nguyen Dinh Chieu Street, Nha Trang City, Viet Nam
| | - Trinh S H Truong
- Institute of Oceanography, VAST, 01 Cau Da street, Nha Trang City, Viet Nam
| | - Mary S Wisz
- World Maritime University, Fiskehamnsgatan 1, Malmö, Sweden
| | | | - Minh T T Vu
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture, Nha Trang University, No 2 Nguyen Dinh Chieu Street, Nha Trang City, Viet Nam
| | - Minh-Hoang Le
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture, Nha Trang University, No 2 Nguyen Dinh Chieu Street, Nha Trang City, Viet Nam
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9
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Rodríguez-Graña L, Calliari D. Senescence in Acartia tonsa (Copepoda, Calanoida): male’s reproductive performance preliminary results from a southern population. INVERTEBR REPROD DEV 2020. [DOI: 10.1080/07924259.2020.1748126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Laura Rodríguez-Graña
- Ecología Funcional de Sistemas Acuáticos, Centro Universitario Regional del Este, Universidad de la República, Rocha, Uruguay
| | - Danilo Calliari
- Ecología Funcional de Sistemas Acuáticos, Centro Universitario Regional del Este, Universidad de la República, Rocha, Uruguay
- Oceanografía y Ecología Marina, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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10
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Cayuela H, Akani GC, Hema EM, Eniang EA, Amadi N, Ajong SN, Dendi D, Petrozzi F, Luiselli L. Life history and age-dependent mortality processes in tropical reptiles. Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/blz103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Actuarial senescence appears to be a common process, and senescence patterns are highly variable across the tree of life. To date, studies on animal senescence have largely focused on model species, such as as fruit flies, humans and a few other endotherms. In contrast, our knowledge about ageing remains fragmentary in ectotherm vertebrates, such as reptiles. Here, we examined life history and age-dependent mortality patterns in three tropical tortoises (Kinixys erosa, Kinixys homeana and Kinixys nogueyi) and snakes (Bitis gabonica, Bitis nasicornis and Causus maculatus). Our study revealed that tortoises of the genus Kinixys had a higher survival and a lower recruitment than snakes of the genera Bitis and Causus, indicating a slower life history. Furthermore, we confirmed that survival decreased more slowly with age in tortoises than in snakes. In addition, we highlighted contrasting patterns of age-dependent mortality among the three genera. In Kinixys, the relationship between mortality rate and age was positive and linear, suggesting gradual senescence over tortoise lifetime. In contrast, the relationship between mortality rate and age was negative and sharp in Bitis and Causus, possibly owing to a ‘negative senescence’. Our study is one of the few to have examined and compared the demography and age-dependent mortality patterns of tropical reptiles. Among other things, our results suggest that although negative senescence has never been reported in endotherm vertebrates, it could be a common phenomenon in ectotherms.
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Affiliation(s)
- Hugo Cayuela
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, Canada
| | - Godfrey C Akani
- Department of Applied and Environmental Biology, Rivers State University of Science and Technology, P.M.B., Port Harcourt, Rivers State, Nigeria
- Institute for Development, Ecology, Conservation and Cooperation, via G. Tomasi di Lampedusa, Rome, Italy
| | - Emmanuel M Hema
- Université de Dédougou, UFR/Sciences Appliquées et Technologiques, Dédougou, Burkina Faso
- Laboratoire de Biologie et Ecologie Animales, Université Ouaga I Prof. Joseph Ki-Zerbo, Ouagadougou, Burkina Faso
| | - Edem A Eniang
- Department of Forestry and Wildlife, University of Uyo, Uyo, Akwa Ibom State, Nigeria
| | - Nioking Amadi
- Department of Applied and Environmental Biology, Rivers State University of Science and Technology, P.M.B., Port Harcourt, Rivers State, Nigeria
| | | | - Daniele Dendi
- Department of Applied and Environmental Biology, Rivers State University of Science and Technology, P.M.B., Port Harcourt, Rivers State, Nigeria
- Institute for Development, Ecology, Conservation and Cooperation, via G. Tomasi di Lampedusa, Rome, Italy
- Department of Zoology, University of Lomé, Lomé, Togo
| | - Fabio Petrozzi
- Istituto Tecnico di Ecologia Applicata, Fano (PU), Italy
| | - Luca Luiselli
- Department of Applied and Environmental Biology, Rivers State University of Science and Technology, P.M.B., Port Harcourt, Rivers State, Nigeria
- Institute for Development, Ecology, Conservation and Cooperation, via G. Tomasi di Lampedusa, Rome, Italy
- Department of Zoology, University of Lomé, Lomé, Togo
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Extreme temperature impairs growth and productivity in a common tropical marine copepod. Sci Rep 2019; 9:4550. [PMID: 30872725 PMCID: PMC6418224 DOI: 10.1038/s41598-019-40996-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 02/26/2019] [Indexed: 12/11/2022] Open
Abstract
Shallow, tropical marine ecosystems provide essential ecosystem goods and services, but it is unknown how these ecosystems will respond to the increased exposure to the temperature extremes that are likely to become more common as climate change progresses. To address this issue, we tracked the fitness and productivity of a key zooplankton species, the copepod Pseudodiaptomus annandalei, acclimated at two temperatures (30 and 34 °C) over three generations. 30 °C is the mean temperature in the shallow water of the coastal regions in Southeast Asia, while 34 °C simulated a temperature extreme that occurs frequently during the summer period. For each generation, we measured the size at maturity and reproductive success of individuals. In all three generations, we found strong negative effects of warming on all measured fitness-related parameters, including prolonged development time, reduced size at maturity, smaller clutch sizes, lower hatching success, and reduced naupliar production. Our results suggest that P. annandalei are already exposed to temperatures that exceed their upper thermal optimum. Increased exposure to extreme temperatures may reduce the abundance of these tropical marine copepods, and thus reduce the availability of resources to higher trophic levels.
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Pietrzak B, Grzesiuk M, Dorosz J, Mikulski A. When males outlive females: Sex-specific effects of temperature on lifespan in a cyclic parthenogen. Ecol Evol 2018; 8:9880-9888. [PMID: 30386583 PMCID: PMC6202703 DOI: 10.1002/ece3.4473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 03/26/2018] [Accepted: 06/27/2018] [Indexed: 12/16/2022] Open
Abstract
Lifespans of males and females frequently differ as a consequence of different life history strategies adopted to maximize fitness. It is well visible in cyclic parthenogens, such as water fleas of the genus Daphnia, where males appear in the population usually only for periods when receptive females are available. Moreover, even within one sex, different life history strategies and mechanisms regulating lifespan may exist. Previous studies suggested that Daphnia males may regulate their lifespan by staying in colder waters than females. We hypothesize that such behavioral mechanism should be associated with stronger reaction to low temperature-that is greater lifespan extension in males than in females. In this study, we monitored survivorship of Daphnia magna females and males of three clonal lines cultured at 16 or 20°C. The results did not provide a species-level corroboration of our hypothesis; instead, they revealed very strong intraspecific differences in the responses of male and female lifespan to temperature change. They further suggest the existence of parallel life history strategies, hypothesis whose tests would bring new insights into the ecology of males in cyclic parthenogens.
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Affiliation(s)
- Barbara Pietrzak
- Department of HydrobiologyFaculty of BiologyUniversity of Warsaw at Biological and Chemical Research CentreWarsawPoland
| | - Małgorzata Grzesiuk
- Department of HydrobiologyFaculty of BiologyUniversity of Warsaw at Biological and Chemical Research CentreWarsawPoland
| | - Julia Dorosz
- Department of HydrobiologyFaculty of BiologyUniversity of Warsaw at Biological and Chemical Research CentreWarsawPoland
| | - Andrzej Mikulski
- Department of HydrobiologyFaculty of BiologyUniversity of Warsaw at Biological and Chemical Research CentreWarsawPoland
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Krause KE, Dinh KV, Nielsen TG. Increased tolerance to oil exposure by the cosmopolitan marine copepod Acartia tonsa. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 607-608:87-94. [PMID: 28688259 DOI: 10.1016/j.scitotenv.2017.06.139] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/19/2017] [Accepted: 06/17/2017] [Indexed: 06/07/2023]
Abstract
Oil contamination is an environmental hazard to marine ecosystems, but marine organism tolerance to oil after many generations of exposure remains poorly known. We studied the effects of transgenerational oil exposure on fitness-related traits in a cosmopolitan neritic copepod, Acartia tonsa. Copepods were exposed to an oil compound, the PAH pyrene, at concentrations of 1, 10, 100 and 100+(the saturated pyrene concentration in seawater)nM over two generations and measured survival, sex ratio, size at maturity, grazing rate and reproductive success. Exposure to the pyrene concentration of 100+nM resulted in 100% mortality before adulthood in the first generation. At the pyrene concentration of 100nM, pyrene reduced grazing rate, increased mortality, reduced the size of females and caused lower egg production and hatching success. Importantly, we found strong evidence for increased tolerance to pyrene exposure in the second generation: the reduction in size at maturity of females was less pronounced in the second generation and survival, egg production and hatching success were recovered to control levels in the second generation. The increased tolerance of copepods to oil contamination may dampen the direct ecological consequences of a coastal oil spill, but it raises the concern whether a larger fraction of oil components accumulated in survived copepods, may be transferred up the food web.
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Affiliation(s)
- Kamille Elvstrøm Krause
- Section for Oceans and Arctic, National Institute of Aquatic Resources, Technical University of Denmark, Kemitorvet, bygning 201, Lyngby Campus, 2800 Kgs. Lyngby, Denmark
| | - Khuong V Dinh
- Section for Oceans and Arctic, National Institute of Aquatic Resources, Technical University of Denmark, Kemitorvet, bygning 201, Lyngby Campus, 2800 Kgs. Lyngby, Denmark.
| | - Torkel Gissel Nielsen
- Section for Oceans and Arctic, National Institute of Aquatic Resources, Technical University of Denmark, Kemitorvet, bygning 201, Lyngby Campus, 2800 Kgs. Lyngby, Denmark
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14
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Saiz E, Calbet A, Griffell K. Sex-Dependent Effects of Caloric Restriction on the Ageing of an Ambush Feeding Copepod. Sci Rep 2017; 7:12662. [PMID: 28978933 PMCID: PMC5627296 DOI: 10.1038/s41598-017-12661-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 09/18/2017] [Indexed: 01/25/2023] Open
Abstract
Planktonic copepods are a very successful group in marine pelagic environments, with a key role in biogeochemical cycles. Among them, the genus Oithona is one of the more abundant and ubiquitous. We report here on the effects of caloric (food) restriction on the ageing patterns of the copepod Oithona davisae. The response of O. davisae to caloric restriction was sex dependent: under food limitation, females have lower age-specific mortality rates and longer lifespans and reproductive periods; male mortality rates and life expectancy were not affected. Males are more active swimmers than females, and given their higher energetic demands presumably generate reactive oxygen species at higher rates. That was confirmed by starvation experiments, which showed that O. davisae males burn through body reserves much faster, resulting in shorter life expectancy. Compared with common, coastal calanoid copepods, the effects of caloric restriction on O. davisae appeared less prominent. We think this difference in the magnitude of the responses is a consequence of the distinct life-history traits associated with the genus Oithona (ambush feeder, egg-carrier), with much lower overall levels of metabolism and reproductive effort.
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Affiliation(s)
- Enric Saiz
- Institut de Ciències del Mar - CSIC, Pg. Marítim de la Barceloneta 37-49, 08003, Barcelona, Catalonia, Spain.
| | - Albert Calbet
- Institut de Ciències del Mar - CSIC, Pg. Marítim de la Barceloneta 37-49, 08003, Barcelona, Catalonia, Spain
| | - Kaiene Griffell
- Institut de Ciències del Mar - CSIC, Pg. Marítim de la Barceloneta 37-49, 08003, Barcelona, Catalonia, Spain
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Benedetti F, Gasparini S, Ayata SD. Identifying copepod functional groups from species functional traits. JOURNAL OF PLANKTON RESEARCH 2016; 38:159-166. [PMID: 26811565 PMCID: PMC4722884 DOI: 10.1093/plankt/fbv096] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 10/13/2015] [Indexed: 05/19/2023]
Abstract
We gathered information on the functional traits of the most representative copepod species in the Mediterranean Sea. Our database includes 191 species described by 7 traits encompassing diverse ecological functions: minimal and maximal body length, trophic group, feeding type, spawning strategy, diel vertical migration and vertical habitat. Cluster analysis in the functional trait space revealed that Mediterranean copepods can be separated into groups with distinct ecological roles.
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16
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Ageing and Caloric Restriction in a Marine Planktonic Copepod. Sci Rep 2015; 5:14962. [PMID: 26455575 PMCID: PMC4601087 DOI: 10.1038/srep14962] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 09/09/2015] [Indexed: 01/25/2023] Open
Abstract
Planktonic copepods are a key group in the marine pelagic ecosystem, linking primary production with upper trophic levels. Their abundance and population dynamics are constrained by the life history tradeoffs associated with resource availability, reproduction and predation pressure. The tradeoffs associated with the ageing process and its underlying biological mechanisms are, however, poorly known. Our study shows that ageing in copepods involves a deterioration of their vital rates and a rise in mortality associated with an increase in oxidative damage (lipid peroxidation); the activity of the cell-repair enzymatic machinery also increases with age. This increase in oxidative damage is associated with an increase in the relative content of the fatty acid 22:6(n-3), an essential component of cell membranes that increases their susceptibility to peroxidation. Moreover, we show that caloric (food) restriction in marine copepods reduces their age-specific mortality rates, and extends the lifespan of females and their reproductive period. Given the overall low production of the oceans, this can be a strategy, at least in certain copepod species, to enhance their chances to reproduce in a nutritionally dilute, temporally and spatially patchy environment.
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