András Abonyi, Matthias Pilecky, Serena Rasconi, Robert Ptacnik, Martin J Kainz
{"title":"Chytrids alleviate the harmful effect of heat and cyanobacteria diet on <i>Daphnia</i> via PUFA-upgrading.","authors":"András Abonyi, Matthias Pilecky, Serena Rasconi, Robert Ptacnik, Martin J Kainz","doi":"10.1093/plankt/fbad012","DOIUrl":"https://doi.org/10.1093/plankt/fbad012","url":null,"abstract":"<p><p>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 temperature (ambient: 18°C, heat: +6°C) and the presence of chytrids with <i>Daphnia magna</i> as the consumer, and <i>Planktothrix rubescens</i> as the main diet. We hypothesized that chytrids would support <i>Daphnia</i> fitness with PUFA, irrespective of water temperature. Heating was detrimental to the fitness of <i>Daphnia</i> when feeding solely on the <i>Planktothrix</i> diet. Chytrid-infected <i>Planktothrix</i> diet alleviated the negative impact of heat and could support <i>Daphnia</i> survival, somatic growth and reproduction. Carbon stable isotopes of fatty acids highlighted a ~3x more efficient n-3 than n-6 PUFA conversion by <i>Daphnia</i> feeding on the chytrid-infected diet, irrespective of temperature. The chytrid diet significantly increased eicosapentaenoic acid (EPA; 20:5n-3) and arachidonic acid (ARA; 20:4n-6) retention in <i>Daphnia</i>. The EPA retention remained unaffected, while ARA retention increased in response to heat. We conclude that chytrids support pelagic ecosystem functioning under cyanobacteria blooms and global warming via chytrids-conveyed PUFA toward higher trophic levels.</p>","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 3","pages":"454-466"},"PeriodicalIF":2.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10243842/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9971647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Oscar Casas-Monroy, Torben Brydges, Jocelyn Kydd, Dawson Ogilvie, Robin M Rozon, Sarah A Bailey
{"title":"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).","authors":"Oscar Casas-Monroy, Torben Brydges, Jocelyn Kydd, Dawson Ogilvie, Robin M Rozon, Sarah A Bailey","doi":"10.1093/plankt/fbad014","DOIUrl":"https://doi.org/10.1093/plankt/fbad014","url":null,"abstract":"<p><p>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 for indicative analysis of organisms by assessing their accuracy (comparison to microscopy) and precision (comparison within measurement). Challenge fresh water samples were collected in four locations of Lake Ontario, Canada, whereas marine challenge water samples were collected around the Bay of Fundy, New Brunswick, Canada. Ballast water samples were collected from ships visiting several ports across Canada. Overall, accuracy was higher (>80%) in estimating organisms from prepared-challenge water (Ballast Eye and BallastWISE) than from ballast water samples (>70%) (B-QUA only). The sensitivity ranged from 50 to 100% for the ≥50 μm organism size class, whereas for the ≥10-<50 μm organism size class, it was higher for freshwater samples (>75%) than for marine samples (>50%). The performance of CMDs should be assessed under real-world conditions for a better understanding and to improve their use.</p>","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 3","pages":"540-553"},"PeriodicalIF":2.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10243861/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9590930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Taryn Smit, Catriona Clemmesen, Daniel A Lemley, Janine B Adams, Eugin Bornman, Nadine A Strydom
{"title":"Body condition of larval roundherring, <i>Gilchristella aestuaria</i> (family Clupeidae), in relation to harmful algal blooms in a warm-temperate estuary.","authors":"Taryn Smit, Catriona Clemmesen, Daniel A Lemley, Janine B Adams, Eugin Bornman, Nadine A Strydom","doi":"10.1093/plankt/fbad013","DOIUrl":"https://doi.org/10.1093/plankt/fbad013","url":null,"abstract":"<p><p>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 resident fish. Recurrent phytoplankton blooms of <i>Heterosigma akashiwo</i> occur in the warm-temperate Sundays Estuary on the southeast coast of South Africa. The response in body condition and assemblage structure on larval estuarine roundherring (<i>Gilchristella aestuaria</i>) was measured in conjunction with bloom conditions, water quality and zooplanktonic prey and predators. Larvae and early juveniles were sampled during varying intensity levels, duration and frequency of hypereutrophic blooms. This study demonstrated that extensive HABs could significantly impact larval roundherring, <i>G. aestuaria</i>, by decreasing larval nutritional condition and limiting their growth, resulting in poor grow-out into the juvenile phase. Poor condition and growth may likely affect recruitment success to adult populations, and since <i>G. aestuaria</i> is an important forage fish and zooplanktivore, poor recruitment will hold consequences for estuarine food webs.</p>","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 3","pages":"523-539"},"PeriodicalIF":2.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10243853/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9598751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haibo Li, Chaofeng Wang, Li Zhao, Yi Dong, Yuan Zhao, Wuchang Zhang
{"title":"Variability of tintinnid ciliate communities with water masses in the western Pacific Ocean","authors":"Haibo Li, Chaofeng Wang, Li Zhao, Yi Dong, Yuan Zhao, Wuchang Zhang","doi":"10.1093/plankt/fbad011","DOIUrl":"https://doi.org/10.1093/plankt/fbad011","url":null,"abstract":"\u0000 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 of 84 tintinnid species were identified. The Kuroshio intrusion has obvious influence on tintinnid distribution and community structure. Fifty-two tintinnid species with relatively high occurrence frequency were classified into neritic, transitional, Kuroshio, warm-pool and cosmopolitan species. We verified the existence of tintinnid transitional species and community in Mixed Water between Neritic and Kuroshio Waters (KW). Tintinnid species richness, abundance, Shannon-Wiener index and Pielou index were higher in the KW than in the Warm-pool Water. The community complexity and stability was highest in the KW. Our findings provide a profound understanding of planktonic biogeography and community variation from nearshore to open waters in tropical and subtropical oceans.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48409296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gabriel A Mondragón-Neri, J. Gómez‐Gutiérrez, Franklin García-Fernández, D. Gendron, Geraldine Busquets-Vass, C. Robinson
{"title":"Ontogenetic social behavior and seasonal abundance of the subtropical krill Nyctiphanes simplex in northwestern Mexican waters","authors":"Gabriel A Mondragón-Neri, J. Gómez‐Gutiérrez, Franklin García-Fernández, D. Gendron, Geraldine Busquets-Vass, C. Robinson","doi":"10.1093/plankt/fbad008","DOIUrl":"https://doi.org/10.1093/plankt/fbad008","url":null,"abstract":"\u0000 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% of the krill assemblage. N. simplex exhibited complex and dynamic social repertoires of intraspecific behavioral interactions as early as Calyptopis 1 to adult phase, showing all possible ranges of social behavior known for pelagic invertebrates (aggregations, swarms, schools, shoals). We conclude that N. simplex displays different degrees of social behavior that concentrate abundance throughout their life cycle in epibenthic, pelagic and near surface habitats being highly adaptive behavior for feeding and reproduction. However, social interactions also pose a negative effect, facilitating parasite and disease transmission among conspecifics and facilitate predation for diverse visual predators adapted to find and prey on N. simplex aggregations and swarms. We report the most complete integrated evidence of social behavior and dataset of abundance data of any krill species in tropical and subtropical regions that have remained overlooked using traditional zooplankton net sampling methods.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45284032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Short-term variability in plankton abundance on the inner shelf off Ubatuba, Brazil","authors":"S. B. Penninck, R. Lopes","doi":"10.1093/plankt/fbad009","DOIUrl":"https://doi.org/10.1093/plankt/fbad009","url":null,"abstract":"\u0000 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 variations in the distribution of plankton along the inner shelf off Ubatuba, Brazil. We quantified the abundance and diversity of the main planktonic taxa (>100 μm) and their spatiotemporal distribution in winter 2018 and summer 2019 using high-resolution sensors and a shadowgraphic imaging system at cross-shore and fixed stations (12 and 24 h). Summer–winter environmental contrast was evident in the water column stability and plankton abundance. In the summer, higher values of plankton abundance and diversity were obtained. Our results suggested that spatiotemporal variations related to wind-induced mixing and water mass intrusions lead to variabilities in plankton populations on a time scale of a few hours, vertically between depth layers and at spatial scales ˂2 km. This study contributes to the knowledge of the mechanisms of biophysical interactions and their spatiotemporal variation, which is crucial for assessing the effects of climate variability on plankton-mediated ecosystem services.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43673445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Pioneers of plankton research: Salvatore Lo Bianco (1860–1910)","authors":"J. Dolan","doi":"10.1093/plankt/fbad010","DOIUrl":"https://doi.org/10.1093/plankt/fbad010","url":null,"abstract":"","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42772111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Plum, Fenja-Marie Möller, Mike Smykala, S. Moorthi
{"title":"Elemental composition and stoichiometry of krill and salps","authors":"C. Plum, Fenja-Marie Möller, Mike Smykala, S. Moorthi","doi":"10.1093/plankt/fbad005","DOIUrl":"https://doi.org/10.1093/plankt/fbad005","url":null,"abstract":"\u0000 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 and gut content of Euphausia superba and Salpa thompsoni collected along the Northern Antarctic Peninsula and conducted a systematic literature review on the stoichiometry of 33 euphausiid and 19 salp species. Our data revealed significantly lower body C:P and N:P ratios but higher gut content N:P in S. thompsoni compared with E. superba, suggesting higher P uptake. In contrast, literature data showed higher C:N, C:P and N:P ratios in salps, potentially indicating lower nutrient demand compared with krill. However, literature data exhibited high intra- and interspecific variability potentially driven by organism size, seasonal or latitudinal variations, emphasizing that nutritional requirements are not only related to the target species, but also to its habitat. Our study provides valuable stoichiometric information for future experimental and modeling studies, fostering our ability to predict the future role of krill and salps for ocean biogeochemistry.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47754286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Youta Sugai, Noriaki Natori, Kenji Tsuchiya, Megumi Nakagawa, Makio C Honda, Shinji Shimode, Tatsuki Toda
{"title":"Ingestion rate estimated from food concentration and predatory role of copepod nauplii in the microbial food web of temperate embayment waters.","authors":"Youta Sugai, Noriaki Natori, Kenji Tsuchiya, Megumi Nakagawa, Makio C Honda, Shinji Shimode, Tatsuki Toda","doi":"10.1093/plankt/fbad002","DOIUrl":"https://doi.org/10.1093/plankt/fbad002","url":null,"abstract":"<p><p>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 (<i>Acartia</i> spp. nauplii) was estimated from water temperature, individual carbon weight and food concentration and peaked (>0.50 μgC ind<sup>-1</sup> d<sup>-1</sup>) with relatively high food concentration (>57.5 μgC L<sup>-1</sup>). This result suggests that food concentration should be considered to estimate copepod naupliar IR in marine environments, especially where biological conditions fluctuate largely. The comparison of copepod naupliar and microprotozoan FR showed the dominance of naked ciliate FR (77.0-90.2%) during the study period except in spring when comparable values were observed between the FR of naked ciliates (41.6%) and copepod nauplii (33.6%). During spring, transfer efficiency (10.5%) from primary production (PP) to microzooplankton production was lower than in other seasons (16.2-17.1%). This study indicates that copepod nauplii are seasonally important micro-sized predators in the microbial food web of temperate embayment waters and that carbon flow through copepod nauplii is a pathway which inefficiently transfers PP to higher trophic levels.</p>","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 2","pages":"325-337"},"PeriodicalIF":2.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10066810/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9247184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pau Giménez-Grau, Lluís Camarero, Carlos Palacín-Lizarbe, Marc Sala-Faig, Aitziber Zufiaurre, Sergi Pla-Rabés, Marisol Felip, Jordi Catalan
{"title":"Self-filling enclosures to experimentally assess plankton response to pulse nutrient enrichments.","authors":"Pau Giménez-Grau, Lluís Camarero, Carlos Palacín-Lizarbe, Marc Sala-Faig, Aitziber Zufiaurre, Sergi Pla-Rabés, Marisol Felip, Jordi Catalan","doi":"10.1093/plankt/fbac074","DOIUrl":"https://doi.org/10.1093/plankt/fbac074","url":null,"abstract":"<p><p>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 ~100 L volume) consists of a narrow translucent cylinder that can comprise the entire photic zone (or a large part of it in clear deep lakes, e.g. 20-m long) and holds a sediment trap at the bottom for recovering the sinking material. The enclosures are inexpensive and straightforward to build. Thus, many can be used in an experiment, favoring the diversity of treatments and the number of replicates. They also are lightweight with easy transport and use in lakes that cannot be reached by road. The enclosures are fundamentally aimed at investigating the short-term response of the planktonic community, integrated across the photic zone, to pulse perturbations using before and after comparisons and multiple replication and treatments. The pros and cons of the enclosure design are evaluated based on experience gained in Lake Redon, a high mountain ultraoligotrophic deep lake in the Pyrenees.</p>","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 2","pages":"266-277"},"PeriodicalIF":2.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10066807/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9247183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}