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Evidence for adaptive strategies in larval capelin on the northeastern coast of Newfoundland, Canada J. Plankton Res. (IF 2.1) Pub Date : 2024-03-05 Ashley Tripp, Hannah M Murphy, Gail K Davoren
Fish species with high mortality during early life may maximize fitness using adaptive strategies to time hatching to match favorable environmental conditions (match/mismatch) or extending spawning/hatching to disperse risk (bet-hedging). We examined support for these strategies in a collapsed forage fish, capelin (Mallotus villosus), in coastal Newfoundland (2018–2021). Capelin shift from spawning
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Seasonal organization of tintinnid community by temperature preference and LOD size-class in a subtropical brackish embayment J. Plankton Res. (IF 2.1) Pub Date : 2024-03-05 Jingyuan Li, Ping Du, Haibo Li, Yuan Zhao, Ming Mao, Li Zhao, Yi Dong, Yepeng Xu, Gérald Grégori, Wuchang Zhang
Most annual studies of tintinnid and phytoplankton in coastal habitats are influenced by alien species introduced by water masses exchange, and therefore cannot be used as direct evidence for exploring the mechanism of annual succession in indigenous community. For brackish communities, very limited annual studies exist because of the difficulty of conducting stable sampling in the transition between
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First report of the rare tintinnid genus Stelidiella Kofoid and Campbell 1929 in the Indian Ocean J. Plankton Res. (IF 2.1) Pub Date : 2024-02-01 T P Sarun, Jagadish S Patil
This study provides detailed information on the morphometry and distribution of some rare tintinnids species found in the Indian Ocean. The morphological features (scabbard-shaped with a fenestrated collar) reported here resemble those of the genus Stelidiella. Here, lorica morphology (fenestra arrangement and oral margin (OM) pattern) was the sole criteria for Stelidiella species identification. The
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Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets J. Plankton Res. (IF 2.1) Pub Date : 2024-02-01 Belén Franco-Cisterna, Peter Stief, Ronnie N Glud
Fast-sinking zooplankton carcasses and fecal pellets appear to contribute significantly to the vertical transport of particulate organic carbon (POC), partly because of low temperature that decreases microbial degradation during the descent into the deep ocean. Increasing hydrostatic pressure could further reduce the degradation efficiency of sinking POC, but this effect remains unexplored. Here, the
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Community structure and distribution pattern of appendicularians in the Kuroshio–Oyashio transitional zone during summer J. Plankton Res. (IF 2.1) Pub Date : 2024-01-27 Riki Sato, Taketoshi Kodama, Kiyotaka Hidaka
The Kuroshio–Oyashio transitional zone (KOTZ), constituting the complex water–mass structure surrounding the oceanfront system, is one of the most important fisheries grounds in the western North Pacific. It serves as spawning and nursery sites among several commercially important fish species that consume appendicularians, particularly during the larval stages. In the present study, we investigated
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Seasonal variability drives differences in the structure of the calanoid copepod community in two contrasting regions of the Gulf of Mexico J. Plankton Res. (IF 2.1) Pub Date : 2024-01-24 Aurora Gaona-Hernández, Eduardo Suárez-Morales, Lorena Linacre, Jesus C Compaire, J Rubén Lara-Lara, Sharon Z Herzka
Calanoid copepods (CC) are key contributors to the biological carbon pump and pelagic trophic dynamics. The deep-water regions of Perdido and the Bay of Campeche in the western and southern Gulf of Mexico (GM), respectively, differ in hydrography and productivity, leading to potential differences in copepod biomass and community structure. Zooplankton (0-200 m) were collected from the shelf edge to
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Sediment trap samples reveal regional differences in the population structure of Calanus hyperboreus from the Arctic Ocean J. Plankton Res. (IF 2.1) Pub Date : 2024-01-23 Koki Tokuhiro, Kohei Matsuno, Jonaotaro Onodera, Makoto Sampei, Amane Fujiwara, Naomi Harada, Barbara Niehoff, Eva-Maria Nöthig, Atsushi Yamaguchi
Calanus hyperboreus is one of the dominant copepod species in the Arctic zooplankton communities. The impact of climate change varies among regions within the Arctic, implying that C. hyperboreus populations may be differently affected at different locations, but knowledge on seasonal population dynamics in relation to biogeography is scarce. To fill this gap, we counted C. hyperboreus in samples from
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Seasonal variation in the population structure and production of the copepod Calanus sinicus in the Yellow Sea J. Plankton Res. (IF 2.1) Pub Date : 2024-01-05 Garam Kim, Wongyu Park, Yeonjung Lee, Hyung-Ku Kang
We estimated the total production of Calanus sinicus over four seasons by measuring somatic and egg production rates in the Yellow Sea. In the process of measuring somatic production, the length–weight relationship and growth rates of C. sinicus in this region were also derived. The population abundance and biomass of C. sinicus were especially high in spring. All copepodite stages had similar proportions
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Nutrient availability is the main driver of nanophytoplankton phago-mixotrophy in North American lake surface waters J. Plankton Res. (IF 2.1) Pub Date : 2024-01-04 Philippe Le Noac’h, Bruno Cremella, Jihyeon Kim, Sara Soria-Píriz, Paul A del Giorgio, Amina I Pollard, Yannick Huot, Beatrix E Beisner
There has been limited research on the abiotic and biotic factors affecting the prevalence of phago-mixotrophy (prevMixo) among nanophytoplankton across freshwater ecosystems. In recent years, large-scale sampling campaigns like the EPA-National Lakes Assessment and the NSERC LakePulse survey have generated surface water community composition data for hundreds of lakes across North America, covering
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Reproductive biology, elemental composition and diel vertical migration of the cosmopolitan warm-temperate pelagic tunicate Soestia zonaria J. Plankton Res. (IF 2.1) Pub Date : 2024-01-04 Florian Lüskow, Alexis A Bahl, Moira Décima, Deborah K Steinberg, Evgeny A Pakhomov
Pelagic tunicates (appendicularians, doliolids, pyrosomes, salps) are cosmopolitan members of open-ocean food webs that serve as a link to the microbial loop and play a disproportional role in vertical carbon flux. Soestia zonaria is an oceanic salp species studied for more than a century, but little information exists on its ecology. Specimens of Soestia collected between 2008 and 2021 during four
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Spatial variability in size and lipid content of the marine copepod Calanus finmarchicus across the Northwest Atlantic continental shelves: implications for North Atlantic right whale prey quality J. Plankton Res. (IF 2.1) Pub Date : 2023-12-10 Laura K Helenius, Erica J H Head, Phoebe Jekielek, Christopher D Orphanides, Pierre Pepin, Geneviève Perrin, Stéphane Plourde, Marc Ringuette, Jeffrey A Runge, Harvey J Walsh, Catherine L Johnson
Copepod size and energy content are influenced by regional and seasonal variation in temperature and food conditions, with implications for planktivorous consumers such as the endangered North Atlantic right whale (Eubalaena glacialis). Historical data (1990–2020) on Calanus finmarchicus stage CV copepodite prosome length and oil sac metrics were analyzed to determine the extent of variation in individual
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Automatic estimation of lipid content from in situ images of Arctic copepods using machine learning J. Plankton Res. (IF 2.1) Pub Date : 2023-12-01 Frédéric Maps, Piotr Pasza Storożenko, Jędrzej Świeżewski, Sakina-Dorothée Ayata
In Arctic marine ecosystems, large planktonic copepods form a crucial hub of matter and energy. Their energy-rich lipid stores play a central role in marine trophic networks and the biological carbon pump. Since the past ~15 years, in situ imaging devices provide images whose resolution allows us to estimate an individual copepod’s lipid sac volume, and this reveals many ecological information inaccessible
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Phytoplankton metabolism in a stratified nearshore ecosystem with recurrent harmful algal blooms (HABs) J. Plankton Res. (IF 2.1) Pub Date : 2023-11-20 A Regaudie-de-Gioux, L Latorre, G Basterretxea
The coastal ocean is experiencing changes in its physical and chemical properties that strongly affect planktonic metabolism assemblages and, in some cases, favor the occurrence of harmful algal blooms (HABs). Here we analyze the variations in phytoplankton biomass, gross and net primary production (NCP) as well as community respiration (CR) at two nearshore sampling sites (P1 and P2) located at a
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Experimental analysis of development, lipid accumulation and gene expression in a high-latitude marine copepod J. Plankton Res. (IF 2.1) Pub Date : 2023-11-12 Vittoria Roncalli, Lauren N Block, Jeanette L Niestroy, Matthew C Cieslak, Ann M Castelfranco, Daniel K Hartline, Petra H Lenz
The high-latitude copepod Neocalanus flemingeri exploits the spring phytoplankton bloom to accumulate lipids for survival during food-limited periods and to fuel reproduction. At some point during development, lipid-accumulation ends and pre-adults molt into adults, descend to depth and enter a state of dormancy termed "diapause." How and when they determine to make this transition is still unresolved
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Global gradients in species richness of marine plankton functional groups J. Plankton Res. (IF 2.1) Pub Date : 2023-10-14 Fabio Benedetti, Nicolas Gruber, Meike Vogt
The patterns of species diversity of plankton functional groups (PFGs) remain poorly understood although they matter greatly for marine ecosystem functioning. Here, we use an ensemble of empirical species distribution models for 845 plankton species to estimate the global species richness of three phytoplankton and 11 zooplankton functional groups as a function of objectively selected environmental
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Abundance and biomass of copepods and cladocerans in Atlantic and Arctic domains of the Barents Sea ecosystem J. Plankton Res. (IF 2.1) Pub Date : 2023-10-14 Hein Rune Skjoldal, Johanna Myrseth Aarflot
Zooplankton in the Barents Sea have been monitored annually with a standard procedure with determination of size-fractioned biomass since the mid-1980s. Biomass of copepods and cladocerans was estimated based on measured abundance and individual weights taken from literature. Calanus species were dominant, making up ~85% of the estimated biomass of copepods. The second most important taxon was Oithona
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RNA/DNA ratios as estimate of metabolic and functional traits in diatom species from the northwestern Adriatic Sea J. Plankton Res. (IF 2.1) Pub Date : 2023-10-14 Silvia Casabianca, Samuela Capellacci, Fabio Ricci, Giorgia Ravera, Geraldina Signa, Michele Scardi, Antonella Penna
Different phytoplankton biomass estimations can provide information about abundance variation, but they are not able to describe the metabolic activity of species or groups within assemblages. Conversely, molecular traits are key for the metabolic dynamics in pelagic ecosystems. To investigate if the RNA/DNA and taxon-specific 18S ribosomal RNA (rRNA)/ribosomal DNA (rDNA) ratios could be used to assess
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Impacts of sample storage time on estimates of phytoplankton abundance: how long is too long? J. Plankton Res. (IF 2.1) Pub Date : 2023-10-03 Patricia Nogueira, Ana B Barbosa, Rita B Domingues
Phytoplankton play a key role in marine ecosystems, making the accurate quantification of functional groups/species, using standardized microscopy techniques, essential in many research efforts. In this study we aimed to evaluate the effects of (a) storage time on the abundance of microphytoplankton in samples fixed with acid Lugol’s solution; (b) storage time on the abundance of pico- and nanophytoplankton
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Shifts in survival and reproduction after chronic warming enhance the potential of a marine copepod to persist under extreme heat events J. Plankton Res. (IF 2.1) Pub Date : 2023-09-06 Carlos de Juan, Albert Calbet, Enric Saiz
The study of a species’ thermal tolerance and vital rates responses provides useful metrics to characterize its vulnerability to ocean warming. Under prolonged thermal stress, plastic and adaptive processes can adjust the physiology of organisms. Yet it is uncertain whether the species can expand their upper thermal limits to cope with rapid and extreme changes in environmental temperature. In this
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Pigment assemblages in subtropical bloom-forming cyanobacteria strains J. Plankton Res. (IF 2.1) Pub Date : 2023-08-23 Sylvia Bonilla, Bruno Cremella, Victoria Acuña, Signe Haakonsson
Pigments are powerful indicators for chemotaxonomy and remote sensing studies, which are the approaches used for cyanobacterial bloom monitoring. Cyanobacterial pigments include high concentrations of phycobilins and diverse carotenoids. Filamentous nitrogen-fixing species (Nostocales) are frequent in cyanobacterial blooms of warm climate lakes, and more information about pigments can be useful for
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Large-scale culturing of Neogloboquadrina pachyderma, its growth in, and tolerance of, variable environmental conditions J. Plankton Res. (IF 2.1) Pub Date : 2023-08-09 Adele WestgÅrd, Mohamed M Ezat, Thomas B Chalk, Melissa Chierici, Gavin L Foster, Julie Meilland
The planktic foraminifera Neogloboquadrina pachyderma is a calcifying marine protist and the dominant planktic foraminifera species in the polar oceans, making it a key species in marine polar ecosystems. The calcium carbonate shells of foraminifera are widely used in palaeoclimate studies because their chemical composition reflects the seawater conditions in which they grow. This species provides
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Abundance, composition and distribution of carnivorous gelatinous zooplankton in the Northern Gulf of Alaska J. Plankton Res. (IF 2.1) Pub Date : 2023-07-07 Heidi Michelle Cotea Islas, Russell R Hopcroft
Abundance, biomass, size and distribution of macro-jellyfish were measured in the Northern Gulf of Alaska (NGA). Nearly 1000 kg dispersed among ~13 800 jellyfish were collected using a 5-m2 Methot net. We present length-weight regressions for seven most-common taxa. Catches were dominated by the hydrozoan Aequorea victoria and the scyphozoan Chrysaora melanaster. During 2018, epipelagic macro-jellyfish
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Uncovering hidden structures: previously undescribed pseudopodia and ectoplasmic structures in planktonic foraminifera J. Plankton Res. (IF 2.1) Pub Date : 2023-07-07 Mattia Greco, Adele Westgård, Freya E Sykes, Mohamed M Ezat, Julie Meilland
The trophic strategies of cold-water planktonic foraminifera are not well understood due to the challenge of culturing them in polar conditions. Here, we identify previously unknown ectoplasmic and cytoplasmic projections in three species of planktonic foraminifera thriving in polar and subpolar marine environments: Globigerina bulloides, Neogloboquadrina incompta and Neogloboquadrina pachyderma. These
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Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification. J. Plankton Res. (IF 2.1) Pub Date : 2023-07-06 Kevin J Flynn,Aditee Mitra
Plankton phototrophy consumes CO2, increasing seawater pH, while heterotrophy does the converse. Elevation of pH (>8.5) during coastal blooms becomes increasingly deleterious for plankton. Mixoplankton, which can be important bloom-formers, engage in both photoautotrophy and phagoheterotrophy; in theory, this activity could create a relatively stable pH environment for plankton growth. Using a systems
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Errata and re-visitation of “What is the limit for photoautotrophic plankton growth rates?” (Flynn and Raven, 2017) J. Plankton Res. (IF 2.1) Pub Date : 2023-06-27 Kevin J Flynn, John A Raven
An error in our original work prompts a revisitation of factors constraining photoautotrophic plankton growth rates (μmax). Ribulose-1,5-bisphosphate Carboxylase-Oxygenase does not itself provide that constraint, but we identify other factors that result in our previously suggested value of ~2 doublings per day still likely being representative of the maximum for most photoautotrophs. μmax likely evolves
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Temperature, phosphorus and species composition will all influence phytoplankton production and content of polyunsaturated fatty acids J. Plankton Res. (IF 2.1) Pub Date : 2023-06-27 Marco L Calderini, Salli Pääkkönen, Pauliina Salmi, Elina Peltomaa, Sami J Taipale
Temperature increases driven by climate change are expected to decrease the availability of polyunsaturated fatty acids in lakes worldwide. Nevertheless, a comprehensive understanding of the joint effects of lake trophic status, nutrient dynamics and warming on the availability of these biomolecules is lacking. Here, we conducted a laboratory experiment to study how warming (18–23°C) interacts with
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Temporal and vertical dynamics of diatoms and dinoflagellates in the southeastern Mediterranean Sea J. Plankton Res. (IF 2.1) Pub Date : 2023-06-14 Eyal Rahav, Ilana Berman-Frank
The temporal distributions of microphytoplankton were studied monthly over 2 years in the shelf and the offshore waters of the “low nutrients low chlorophyll” (LNLC) southeastern (SE) Mediterranean Sea. The microphytoplankton were comprised mostly of diatoms (0–542 cells L−1, ~4 × 106–44 × 106 cells m−2) of the genera Rhizosolenia, Thalassionema, Chaetoceros, Leptocylindrus and Pseudo-nitzschia, and
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Diel, seasonal and vertical changes in the abundance, biomass and community structure of pelagic polychaetes at the subtropical station S1 in the western North Pacific: comparison with the results from the subarctic station K2 J. Plankton Res. (IF 2.1) Pub Date : 2023-06-14 Kanako Amei, Ryo Dobashi, Minoru Kitamura, Atsushi Yamaguchi
Information on pelagic polychaete community structure in the western North Pacific is available for the subarctic region (Station K2) but not for the subtropical region. Hence, we analyzed day–night vertically stratified samples collected in eight layers within the first 1000 m of the water column during four seasons in 1 year, using the same sampling method as St. K2, at the subtropical region (Station
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Mixoplankton and mixotrophy: future research priorities J. Plankton Res. (IF 2.1) Pub Date : 2023-06-10 Nicole C Millette, Rebecca J Gast, Jessica Y Luo, Holly V Moeller, Karen Stamieszkin, Ken H Andersen, Emily F Brownlee, Natalie R Cohen, Solange Duhamel, Stephanie Dutkiewicz, Patricia M Glibert, Matthew D Johnson, Suzana G Leles, Ashley E Maloney, George B Mcmanus, Nicole Poulton, Sarah D Princiotta, Robert W Sanders, Susanne Wilken
Phago-mixotrophy, the combination of photoautotrophy and phagotrophy in mixoplankton, organisms that can combine both trophic strategies, have gained increasing attention over the past decade. It is now recognized that a substantial number of protistan plankton species engage in phago-mixotrophy to obtain nutrients for growth and reproduction under a range of environmental conditions. Unfortunately
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Thermal niche of the dinoflagellate Karlodinium veneficum across different salinity and light levels J. Plankton Res. (IF 2.1) Pub Date : 2023-06-10 Nayani K Vidyarathna, So Hyun (Sophia) Ahn, Patricia M Glibert
The interactive effects of temperature (15–30°C), salinity (5–30) and light (low-100 and high-300 μmol photons m−2 s−1) on growth, thermal niche properties and cellular carbon (C) and nitrogen (N) of the toxic dinoflagellate, Karlodinium veneficum, were studied to understand its potential for change under future climate conditions in the eutrophic Chesapeake Bay. Cell growth was highest under conditions
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Assemblages of pelagic thaliaceans in oceanographic features at the tropical-temperate transition zone of a western boundary current J. Plankton Res. (IF 2.1) Pub Date : 2023-06-09 Kylie A Pitt, Jonathan W Lawley, Charles Hinchliffe, Paloma A Matis, Carolina OlguÍn-Jacobson, Nur Arafeh-Dalmau, Pauline Lindholm, Jade Arnold, Iain M Suthers
Mesoscale oceanographic features influence the composition of zooplankton. Cyclonic eddies can promote upwelling and production of gelatinous zooplankton, which play critical roles in ocean biogeochemical cycling. We examined variation in assemblages of thaliaceans (salps, doliolids and pyrosomes) among mesoscale oceanographic features at the tropical-temperate boundary of the East Australian Current
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Coupling of light and nutrients affects Microcystis gas vesicle content at different depths J. Plankton Res. (IF 2.1) Pub Date : 2023-05-29 Tianhao Wu, Cai Wang, Jing Cao, Zeying Hou, Zhaosheng Chu
Lakes are important water resources for human beings, but Microcystis blooms pose a serious threat to drinking water security and aquatic ecosystems. Gas vesicles (GVs) are an important trigger for the occurrence of Microcystis blooms. To understand the effects of light and nutrients on GV content, the phytoplankton in Lake Erhai were investigated. The results showed that the average GV content in
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Diel, seasonal and vertical changes in the pelagic amphipod communities in the subarctic Pacific: insights from imaging analysis J. Plankton Res. (IF 2.1) Pub Date : 2023-05-26 Ryo Taniguchi, Kanako Amei, Koki Tokuhiro, Yuichiro Yamada, Minoru Kitamura, Atsushi Yamaguchi
Vertically stratified day and night samples were collected from a depth of up to 1000 m during four seasons at a single station in the western subarctic Pacific. Subsequently, the abundance, biovolume, community structure and population structure of the pelagic amphipods were evaluated from the imaging analysis using ZooScan. The stable isotope ratio (δ15N) was also measured for each species. In total
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Should we reconsider how to assess eutrophication? J. Plankton Res. (IF 2.1) Pub Date : 2023-05-25 L Polimene, O Parn, E Garcia-Gorriz, D Macias, A Stips, O Duteil, N Ferreira-Cordeiro, S Miladinova, C Piroddi, N Serpetti
Eutrophication in marine waters is traditionally assessed by checking if nutrients, algal biomass and oxygen are below/above a given threshold. However, increased biomass, nutrient concentrations and oxygen demand do not lead to undesirable environmental effects if the flow of carbon/energy from primary producers toward high trophic levels is consistently preserved. Consequently, traditional indicators
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Temperature as a factor controlling geographical distribution of green Noctiluca scintillans in Southeast Asia J. Plankton Res. (IF 2.1) Pub Date : 2023-05-15 Ken Furuya, Kenta Kozono, Mari Yasuda, Takuo Omura, Valeriano M Borja, Thaithaworn Lirdwitayaprasit
The dinoflagellate Noctiluca scintillans exists in two forms, green and red Noctiluca, with and without the photosynthetic endosymbiont Pedinomonas noctilucae, respectively. In Southeast Asia, green Noctiluca has a northern boundary of distribution in the Luzon Strait and the Vietnamese coast, approximately corresponding to the 25°C isotherm. We examined whether this boundary arose from the growth
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Examining the performance of three ballast water compliance monitoring devices for quantifying live organisms in both regulated size classes (≥50 μm and ≥10–<50 μm) J. Plankton Res. (IF 2.1) Pub Date : 2023-05-15 Oscar Casas-Monroy, Torben Brydges, Jocelyn Kydd, Dawson Ogilvie, Robin M Rozon, Sarah A Bailey
A number of ballast water compliance monitoring devices (CMDs) have been made commercially available to verify the efficacy of ballast water management systems by quantifying the living organisms for both plankton size classes (≥50 μm and ≥10–<50 μm). This study aimed to examine whether new CMDs can provide a reliable indication of compliance regarding Regulation D-2 and to evaluate their performance
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Body condition of larval roundherring, Gilchristella aestuaria (family Clupeidae), in relation to harmful algal blooms in a warm-temperate estuary J. Plankton Res. (IF 2.1) Pub Date : 2023-05-03 Taryn Smit, Catriona Clemmesen, Daniel A Lemley, Janine B Adams, Eugin Bornman, Nadine A Strydom
Eutrophication-driven harmful algal blooms (HABs) can have secondary effects on larval fishes that rely on estuaries as nurseries. However, few studies worldwide have quantified these effects despite the global rise in eutrophication. This study presents a novel approach using biochemical body condition analyses to evaluate the impact of HABs on the growth and body condition of the larvae of an estuarine
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Chytrids alleviate the harmful effect of heat and cyanobacteria diet on Daphnia via PUFA-upgrading J. Plankton Res. (IF 2.1) Pub Date : 2023-04-22 András Abonyi, Matthias Pilecky, Serena Rasconi, Robert Ptacnik, Martin J Kainz
Chytrid fungal parasites increase herbivory and dietary access to essential molecules, such as polyunsaturated fatty acids (PUFA), at the phytoplankton–zooplankton interface. Warming enhances cyanobacteria blooms and decreases algae-derived PUFA for zooplankton. Whether chytrids could support zooplankton with PUFA under global warming scenarios remains unknown. We tested the combined effect of water
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Variability of tintinnid ciliate communities with water masses in the western Pacific Ocean J. Plankton Res. (IF 2.1) Pub Date : 2023-04-18 Haibo Li, Chaofeng Wang, Li Zhao, Yi Dong, Yuan Zhao, Wuchang Zhang
Tintinnids play a pivotal role in the marine plankton ecosystem and are model organisms in plankton studies. However, the biogeographic distribution type and community variation of tintinnids from coastal to open waters in the western Pacific have never been studied before. In the present study, 42 surface tintinnid samples were collected from coastal water to the western Pacific warm pool. A total
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Ontogenetic social behavior and seasonal abundance of the subtropical krill Nyctiphanes simplex in northwestern Mexican waters J. Plankton Res. (IF 2.1) Pub Date : 2023-04-05 Gabriel A Mondragón-Neri, Jaime Gómez-Gutiérrez, Franklin García-Fernández, Diane Gendron, Geraldine Busquets-Vass, Carlos J Robinson
Nyctiphanes simplex (Euphausiidae) is the key prey for numerous pelagic predators because it is the most abundant of the 12 krill species present in the Gulf of California, forming dense and complex ontogenetic social interactions throughout its life cycle. We describe the diverse social behaviors of N. simplex and estimate its seasonal abundance in the Gulf of California accounting on average 74%
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Short-term variability in plankton abundance on the inner shelf off Ubatuba, Brazil J. Plankton Res. (IF 2.1) Pub Date : 2023-03-30 Silvana B Penninck, Rubens M Lopes
The interaction between biological and short-term physical processes affects plankton distribution and composition variability, with consequences for the entire ecosystem. Aspects of the plankton distribution at smaller scales have been understudied, mainly in coastal regions where highly variable conditions promote variations in the biophysical environment. This work aimed to investigate the short-term
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Elemental composition and stoichiometry of krill and salps J. Plankton Res. (IF 2.1) Pub Date : 2023-03-13 Christoph Plum, Fenja-Marie Möller, Mike Smykala, Stefanie Moorthi
Krill and salps play a pivotal role in marine food webs and ocean biogeochemistry, yet little is known about their stoichiometry, which is crucial for our understanding of the consequences of key grazer population shifts for ecosystem functioning. To assess differences in stoichiometric requirements, we compared the elemental composition of carbon (C), nitrogen (N) and phosphorus (P) in body tissue
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Does the predatory rotifer Asplanchna induce a behavioral response in the prey rotifer Brachionus calyciflorus? J. Plankton Res. (IF 2.1) Pub Date : 2023-02-27 John J Gilbert
The planktonic rotifer Brachionus calyciflorus was reported to have a behavioral response to the predatory rotifer Asplanchna, where individuals move up to a surface-film refuge. Here, I re-examine this response and also test the hypothesis that Asplanchna affects the propensity of B. calyciflorus to attach to glass surfaces. In eight experiments where B. calyciflorus was exposed to a strong Asplanchna
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Opportunistic vs selective feeding strategies of zooplankton under changing environmental conditions J. Plankton Res. (IF 2.1) Pub Date : 2023-02-22 Baptiste Serandour, Kinlan M G Jan, Andreas Novotny, Monika Winder
The plankton community consists of diverse interacting species. The estimation of species interactions in nature is challenging. There is limited knowledge on how plankton interactions are influenced by environmental conditions because of limited understanding of zooplankton feeding strategies and factors affecting trophic interactions. In this study, we used DNA-metabarcoding to investigate trophic
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Zooplankton community variability in the South Atlantic Bight (2015–2017) J. Plankton Res. (IF 2.1) Pub Date : 2023-02-03 Natalia B López-Figueroa, Tina L Walters, Abdiel E Laureano-Rosario, Sebastian P DiGeronimo, Pamela Hallock, Marc E Frischer, Áurea E Rodríguez-Santiago, Deidre M Gibson
In the South Atlantic Bight (SAB), responses of zooplankton communities to physical dynamics were evaluated monthly at two sites on the continental shelf offshore from Savannah, GA, USA, between December 2015 and December 2017. Zooplankton were collected in oblique net tows (202-μm). Samples were collected in two regions of the middle shelf: inner edge (Site 1: 25 m isobath, n = 22) and outer edge
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Symbiont diversity in the eukaryotic microbiomes of marine crustacean zooplankton J. Plankton Res. (IF 2.1) Pub Date : 2023-02-02 Rose-Lynne Savage, Jacqueline L Maud, Colleen T E Kellogg, Brian P V Hunt, Vera Tai
Protists (eukaryotic microorganisms) commonly form symbiotic associations with crustacean zooplankton, but their diversity, prevalence and ecological roles are underestimated due to the limited scope of previous investigations. Using metabarcoding of the V4 region of the 18S rRNA gene, we characterized the eukaryotic microbiomes of the dominant crustacean zooplankton, specifically copepods, euphausiids
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Limited effects of macro-nutrient ratios on thiamin content and transfer in phytoplankton and copepods J. Plankton Res. (IF 2.1) Pub Date : 2023-02-02 Emil Fridolfsson, Sanna Majaneva, Samuel Hylander
Vitamin B1 (thiamin) is primarily produced by bacteria, phytoplankton and fungi in aquatic food webs and transferred to higher trophic levels by ingestion. However, much remains unknown regarding the dynamics this water-soluble, essential micronutrient; e.g. how it relates to macronutrients (carbon, nitrogen and phosphorous). Nutrient limitation has been found to be related to periods of thiamin deficiency
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Ingestion rate estimated from food concentration and predatory role of copepod nauplii in the microbial food web of temperate embayment waters J. Plankton Res. (IF 2.1) Pub Date : 2023-02-02 Youta Sugai, Noriaki Natori, Kenji Tsuchiya, Megumi Nakagawa, Makio C Honda, Shinji Shimode, Tatsuki Toda
To quantitatively evaluate the role of copepod nauplii as predators in the microbial food web, the ingestion rate (IR) of copepod nauplii and the food requirement (FR) of microzooplankton were estimated monthly for 3 consecutive years in temperate embayment waters. The IR of dominant copepod nauplii (Acartia spp. nauplii) was estimated from water temperature, individual carbon weight and food concentration
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Annual cycle of mesozooplankton at the coastal waters of Cyprus (Eastern Levantine basin) J. Plankton Res. (IF 2.1) Pub Date : 2023-01-23 G Fyttis, S Zervoudaki, A Sakavara, S Sfenthourakis
This study is the first to explore monthly and seasonal succession of the zooplankton community in coastal waters of Cyprus using a 12-month period time series. A total of 192 taxa of mesozooplankton (MZ), 145 of which were copepods, were identified at three sites at the southern and one site at the northern coasts of the island. Zooplankton distribution and community structure were influenced mostly
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Distribution of squid paralarvae and related oceanographic features in the eastern Campeche Bank, Mexico J. Plankton Res. (IF 2.1) Pub Date : 2023-01-14 Elton A García-Cordova, Roxana De Silva-Dávila, Iván Velázquez-Abunader, José Q García-Maldonado, Pedro-Luis Ardisson
The eastern Campeche Bank is a region where the composition, distribution and abundance of one of its most promising resources, the teuthid cephalopods (squids), need to be better documented, particularly at the paralarval stage. To contribute to its knowledge, we obtained paralarvae from zooplankton samples collected from May 2016 to November 2017, relating and modeling their distribution to sea surface
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Self-filling enclosures to experimentally assess plankton response to pulse nutrient enrichments. J. Plankton Res. (IF 2.1) Pub Date : 2023-01-13 Pau Giménez-Grau,Lluís Camarero,Carlos Palacín-Lizarbe,Marc Sala-Faig,Aitziber Zufiaurre,Sergi Pla-Rabés,Marisol Felip,Jordi Catalan
Experimental nutrient additions are a fundamental approach to investigating plankton ecology. Possibilities range from whole-lake fertilization to flask assays encompassing a trade-off between closeness to the "real world" and feasibility and replication. Here we describe an enclosure type that minimizes the manipulation of planktonic communities during the enclosure filling. The enclosure (typically
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Appendicularians and marine snow in situ vertical distribution in Argentinean Patagonia J. Plankton Res. (IF 2.1) Pub Date : 2023-01-10 Eloísa M Giménez, Ariadna C Nocera, Brenda Temperoni, Gesche Winkler
Detailed in situ vertical and temporal distribution of appendicularians, marine snow, fecal pellets, nano- and microplankton were recorded simultaneously with environmental data in the San Jorge Gulf, Argentinean Patagonia (45°–47°S). Data were taken at a fixed station over 36 h in February 2014 with an autonomous Video Plankton Recorder and a FlowCAM®. The water column was thermally stratified with
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Mucilage protects the planktonic desmid Staurodesmus sp. against parasite attack by a chytrid fungus. J. Plankton Res. (IF 2.1) Pub Date : 2022-12-27 Silke Van Den Wyngaert,Martin J Kainz,Robert Ptacnik
Zoosporic fungi of the phylum Chytridiomycota are ubiquitous parasites of phytoplankton in aquatic ecosystems, but little is known about phytoplankton defense strategies against parasitic chytrid attacks. Using a model chytrid-phytoplankton pathosystem, we experimentally tested the hypothesis that the mucilage envelope of a mucilage-forming desmid species provides protection against the parasitic chytrid
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Calanus helgolandicus - more than a guest in the north? J. Plankton Res. (IF 2.1) Pub Date : 2022-12-11 Mads Schultz, Marvin Choquet, Vigdis Tverberg, Galice Hoarau
Molecular identification of Calanus helgolandicus has revealed a more northern distribution for this boreal species than previously reported. We investigated an Arctic fjord to determine if local reproduction is taking place. Combining time series data from depth stratified sampling with molecular tools for species identification, we found C. helgolandicus from all stages throughout the year including
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Rare but persistent asexual reproduction explains the success of planktonic foraminifera in polar oceans J. Plankton Res. (IF 2.1) Pub Date : 2022-12-11 Julie Meilland, Mohamed M Ezat, Adele WestgÅrd, Clara Manno, RaphaËl Morard, Michael Siccha, Michal Kucera
The reproductive strategy of planktonic foraminifera, key pelagic calcifiers, has long remained elusive, hampering efforts to understand and model their population dynamics. This is particularly critical in polar oceans where their success relies on rapid population growth after the polar night. Here, we provide field and laboratory observations constraining the reproductive cycle of the dominant polar
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Assessing good environmental status through mesozooplankton biodiversity: a step forward J. Plankton Res. (IF 2.1) Pub Date : 2022-12-01 I Theodorou, S Zervoudaki, I Varkitzi, G Tsirtsis
We developed a zooplankton-based water-quality evaluating method using indices of alpha diversity. Two key objectives were set: (i) the comparison of two—different quality—samples from different areas, and the verification of their differentiation, based on mesozooplankton biodiversity indices; and (ii) the development of a methodology, which was able to assess the quality of new marine water samples
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Minimal diel vertical migration and consistent zooplankton capturability in low productivity reservoirs, Oregon J. Plankton Res. (IF 2.1) Pub Date : 2022-11-22 Christina A Murphy, Amanda M M Pollock, Angela Strecker, Sherri L Johnson
Diel migrations of zooplanktons occur in marine and freshwater systems and can complicate inferences from studies. If populations perform vertical or horizontal diel migrations, daytime-only sampling can mischaracterize distributions and abundances. Zooplanktons also often display reduced capture avoidance at night and occupy areas easier to sample near the surface and away from littoral structure
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Tropical cyclones: what are their impacts on phytoplankton ecology? J. Plankton Res. (IF 2.1) Pub Date : 2022-11-21 Peter A Thompson,Hans W Paerl,Lisa Campbell,Kedong Yin,Karlie S McDonald
Following the passage of a tropical cyclone (TC) the changes in temperature, salinity, nutrient concentration, water clarity, pigments and phytoplankton taxa were assessed at 42 stations from eight sites ranging from the open ocean, through the coastal zone and into estuaries. The impacts of the TC were estimated relative to the long-term average (LTA) conditions as well as before and after the TC
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Small is beautiful: the important role of small copepods in carbon budgets of the southern Benguela upwelling system J. Plankton Res. (IF 2.1) Pub Date : 2022-11-10 Maya Bode-Dalby, Randi Würth, Lívia Dias Fernandes de Oliveira, Tarron Lamont, Hans M Verheye, Anna Schukat, Wilhelm Hagen, Holger Auel
Small copepod genera play an important role in marine food webs and biogeochemical fluxes but have been neglected in many studies. This is the first study determining biomass, carbon consumption and egestion rates of small- (<1 mm prosome length, PL), medium- (1–1.5 mm PL) and large-sized (>2 mm PL) copepods along a cross-shelf transect in the southern Benguela upwelling system. Calanoids contributed
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Testing theoretical frameworks of zooplankton longitudinal distribution in a large reservoir J. Plankton Res. (IF 2.1) Pub Date : 2022-11-02 Thomas M Detmer, Hayden Roberts, Kyle Broadway, Joseph Parkos, David Wahl
Reservoirs are thought to contain three zones (riverine, transition and lacustrine) emerging from environmental gradients from the river to the dam where zooplankton are predicted to peak in the transitional zone. Few high spatial resolution studies, however, have surveyed zooplankton distribution in reservoirs, leading to limited knowledge regarding longitudinal abundance and composition of zooplankton