Journal of Plankton Research最新文献_第9页

Ingestion rate estimated from food concentration and predatory role of copepod nauplii in the microbial food web of temperate embayment waters. 从食物浓度估算的摄食率及其在温带海湾水域微生物食物网中的捕食作用。

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-03-01 DOI: 10.1093/plankt/fbad002

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":"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 and peaked (>0.50 μgC ind-1 d-1) with relatively high food concentration (>57.5 μgC L-1). 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.","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}

引用次数: 1

Self-filling enclosures to experimentally assess plankton response to pulse nutrient enrichments. 实验评估浮游生物对脉冲营养物富集反应的自充式围栏。

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-03-01 DOI: 10.1093/plankt/fbac074

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":"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.","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}

引用次数: 0

Annual cycle of mesozooplankton at the coastal waters of Cyprus (Eastern Levantine basin). 塞浦路斯(东黎凡特盆地)沿海水域中浮游动物的年循环。

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-03-01 DOI: 10.1093/plankt/fbac075

G Fyttis, S Zervoudaki, A Sakavara, S Sfenthourakis

{"title":"Annual cycle of mesozooplankton at the coastal waters of Cyprus (Eastern Levantine basin).","authors":"G Fyttis, S Zervoudaki, A Sakavara, S Sfenthourakis","doi":"10.1093/plankt/fbac075","DOIUrl":"https://doi.org/10.1093/plankt/fbac075","url":null,"abstract":"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 by stratification, temperature and Chl-a. The combination of upwelling and advection from the Rhodes Gyre during summer, causing cooler waters in the southern coast of Cyprus, seems to control the food supply and offered favorable feeding conditions to zooplankton, enhancing their numbers. The proximity to a fish farm also positively affected MZ abundance and biomass. This study also revealed the importance of smaller species (e.g. Clausocalanus paululus) and juvenile stages (e.g. Clausocalanus, Oithona and Corycaeus spp.) in composition, structure and functionality of the copepod community. These species seems to be more important in low Chl-a environments, where the relative size of primary consumers is expected to be smaller and the microbial components dominant. This baseline study paves the way for further investigation of the elements of marine food webs in the ultra-oligotrophic environment of the Eastern Mediterranean.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 2","pages":"291-311"},"PeriodicalIF":2.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10066811/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9247186","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}

引用次数: 3

Limited effects of macro-nutrient ratios on thiamin content and transfer in phytoplankton and copepods. 宏观营养配比对浮游植物和桡足动物体内硫胺素含量和转移的影响有限。

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-03-01 DOI: 10.1093/plankt/fbad004

Emil Fridolfsson, Sanna Majaneva, Samuel Hylander

{"title":"Limited effects of macro-nutrient ratios on thiamin content and transfer in phytoplankton and copepods.","authors":"Emil Fridolfsson, Sanna Majaneva, Samuel Hylander","doi":"10.1093/plankt/fbad004","DOIUrl":"https://doi.org/10.1093/plankt/fbad004","url":null,"abstract":"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 as well as in models. Hence, thiamin transfer to copepods from three phytoplankton species from different taxa was investigated, along with the effect of various nutrient regimes on thiamin content. Nutrient levels did not affect thiamin content of phytoplankton nor the transfer to copepods. Instead, phytoplankton displayed species-specific thiamin and macronutrient contents and whilst a higher thiamin content in the prey lead to higher levels in copepods, the transfer was lower for Skeletonema compared to Dunaliella and Rhodomonas. In all, thiamin transfer to copepods is not only dependent on thiamin content of the prey, but also the edibility and/or digestibility is of importance. Thiamin is essential for all organisms, and this study offers insights into the limited effect of macronutrients on the dynamics and transfer of thiamin in the aquatic food webs.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 2","pages":"360-371"},"PeriodicalIF":2.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10066808/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9247185","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}

引用次数: 0

Does the predatory rotifer Asplanchna induce a behavioral response in the prey rotifer Brachionus calyciflorus? 捕食性轮虫Asplanchna是否会在被捕食轮虫Brachionus calyciflorus中诱导行为反应？

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-02-27 DOI: 10.1093/plankt/fbad006

J. J. Gilbert

{"title":"Does the predatory rotifer Asplanchna induce a behavioral response in the prey rotifer Brachionus calyciflorus?","authors":"J. J. Gilbert","doi":"10.1093/plankt/fbad006","DOIUrl":"https://doi.org/10.1093/plankt/fbad006","url":null,"abstract":"\u0000 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 stimulus for periods varying from 3 to 65 h, adults and juveniles showed no increase in propensity to settle at the surface film or to attach to glass surfaces. In treatments with and without Asplanchna, percentages of Brachionus free-swimming, attached to glass or settled at the surface film were 81–100%, 0–18% and 0–3%, respectively. Three types of defensive responses in planktonic rotifers are reviewed: (1) transgenerational, spine-development responses to the Asplanchna kairomone in many brachionids; (2) slow-onset (4–48 h) increases in attachment propensity due to Asplanchna, or just its kairomone, in the facultatively epizoic Brachionus rubens and Brachionus variabilis and in an attachment-prone clone of Brachionus dorcas (B. calyciflorus species complex) and (3) brief escape movements caused by disturbance immediately after contact or near-contact with various predators (Asplanchna, Daphnia, copepods) in Filinia, Keratella, Hexarthra and Polyarthra.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44319648","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}

引用次数: 1

Opportunistic vs selective feeding strategies of zooplankton under changing environmental conditions. 浮游动物在不断变化的环境条件下的机会性与选择性摄食策略。

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-02-22 eCollection Date: 2023-03-01 DOI: 10.1093/plankt/fbad007

Baptiste Serandour, Kinlan M G Jan, Andreas Novotny, Monika Winder

{"title":"Opportunistic vs selective feeding strategies of zooplankton under changing environmental conditions.","authors":"Baptiste Serandour, Kinlan M G Jan, Andreas Novotny, Monika Winder","doi":"10.1093/plankt/fbad007","DOIUrl":"10.1093/plankt/fbad007","url":null,"abstract":"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 interactions in mesozooplankton predators and the influence of prey availability on their feeding behavior. We found that mesozooplankton feeding strategies vary within species across an environmental gradient. Some species, such as Temora longicornis consistently used a selective strategy, while diets of Centropages hamatus and Acartia spp. varied between stations, showing a trophic plasticity with the prey community. We found a dominance of Synechococcales reads in Temora's gut content and a high prey diversity for the cladoceran Evadne nordmanni. Our study shows the wide range of prey species that supports mesozooplankton community and helps to understand the spatial and temporal complexity of plankton species interactions and discriminate the selectivity ability of four zooplankton key species. Due to the central role of plankton in marine waters, a better comprehension of the spatiotemporal variability in species interactions helps to estimate fluxes to benthic and pelagic predators.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"45 2","pages":"389-403"},"PeriodicalIF":2.1,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10066809/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10295390","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}

引用次数: 0

Zooplankton community variability in the South Atlantic Bight (2015–2017) 南大西洋海域浮游动物群落变化(2015-2017)

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-02-03 DOI: 10.1093/plankt/fbad001

Natalia B. López-Figueroa, T. Walters, A. E. Laureano-Rosario, Sebastian P DiGeronimo, P. Hallock, M. Frischer, Á. Rodríguez‐Santiago, D. M. Gibson

{"title":"Zooplankton community variability in the South Atlantic Bight (2015–2017)","authors":"Natalia B. López-Figueroa, T. Walters, A. E. Laureano-Rosario, Sebastian P DiGeronimo, P. Hallock, M. Frischer, Á. Rodríguez‐Santiago, D. M. Gibson","doi":"10.1093/plankt/fbad001","DOIUrl":"https://doi.org/10.1093/plankt/fbad001","url":null,"abstract":"\u0000 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 (Site 2: 40 m isobath, n = 21). Samples were also collected at a third site on the 40 m isobath, ~20 nm south of Site 2 in July and August 2016. Temperature, salinity and fluorescence data were recorded at each site. Overall, 57 taxa were identified with total abundances varying from 1 × 103 to 81 × 103 ind.m−3. Small copepods predominated; notably Paracalanus spp. The highest abundance was recorded in October 2016 at Site 1, following deep mixing induced by Hurricane Matthew. Interannual variability of zooplankton abundance was significant, with higher abundances in 2016 compared with 2017, reflecting higher river runoff in 2016. Samples from Site 3 yielded the largest Dolioletta gegenbauri bloom documented in the SAB. This 2-year time-series, for the first time, suggests that zooplankton communities on the SAB middle shelf region are significantly influenced by continental precipitation patterns.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45531427","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}

引用次数: 0

Symbiont diversity in the eukaryotic microbiomes of marine crustacean zooplankton 海洋甲壳类浮游动物真核微生物群的共生体多样性

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-02-02 DOI: 10.1093/plankt/fbad003

Rose-Lynne Savage, J. Maud, C. Kellogg, B. Hunt, V. Tai

{"title":"Symbiont diversity in the eukaryotic microbiomes of marine crustacean zooplankton","authors":"Rose-Lynne Savage, J. Maud, C. Kellogg, B. Hunt, V. Tai","doi":"10.1093/plankt/fbad003","DOIUrl":"https://doi.org/10.1093/plankt/fbad003","url":null,"abstract":"\u0000 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, amphipods and ostracods, from the Strait of Georgia, Canada. Sequence reads from the alveolates dominated all zooplankton examined, which mostly comprised ciliates and dinoflagellates of known symbiont lineages. These lineages included not only those of parasitoids but also those of uncharacterized species. Apostome ciliate reads were the most abundant in all hosts except for cyclopoid copepods, which were dominated by the parasitic Syndiniales. Most symbiont lineages showed some degree of host preference, particularly Pseudocolliniidae ciliate parasites with ostracods, but were often detected in all hosts indicating broad host specificity. Reads from free-living protists, including diatoms and surprisingly hydrozoans, were inferred to be part of their diet. Hydrozoans may have been ingested from free organic matter, such as detritus or marine snow, suggesting a likely underestimated pathway of carbon cycling. This investigation contributes to resolving the interactions between zooplankton and protists and the potential ecological significance of symbioses on zooplankton productivity.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44573079","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}

引用次数: 1

Distribution of squid paralarvae and related oceanographic features in the eastern Campeche Bank, Mexico 墨西哥坎佩切河岸东部鱿鱼幼虫分布及相关海洋学特征

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-01-13 DOI: 10.1093/plankt/fbac073

E. A. García-Córdova, Roxana De Silva-Dávila, I. Velázquez‐Abunader, J. Q. García-Maldonado, P. Ardisson

{"title":"Distribution of squid paralarvae and related oceanographic features in the eastern Campeche Bank, Mexico","authors":"E. A. García-Córdova, Roxana De Silva-Dávila, I. Velázquez‐Abunader, J. Q. García-Maldonado, P. Ardisson","doi":"10.1093/plankt/fbac073","DOIUrl":"https://doi.org/10.1093/plankt/fbac073","url":null,"abstract":"\u0000 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 temperature, salinity, dissolved oxygen (DO), chlorophyll-a (Chl-a), zooplankton biomass and depth. The results showed that most paralarvae measured <2.0 mm mantle length. Higher abundances were found during upwelling months. Spatiotemporal segregation of teuthid species was observed, with oceanic paralarvae occurring offshore in May–July, and neritic ones appearing nearshore in September–November, Abralia redfieldi and Doryteuthis plei being the most abundant. Statistical generalized additive model for location, scale and shape showed that A. redfieldi was present in the north (offshore), related to warm Caribbean waters, and increased Chl-a and DO concentration. In contrast, D. plei was present in the south (nearshore), related to Yucatan shelf waters and low Chl-a.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41677182","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}

引用次数: 0

Appendicularians and marine snow in situ vertical distribution in Argentinean Patagonia 阿根廷巴塔哥尼亚的阑尾和海洋雪的原位垂直分布

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2023-01-10 DOI: 10.1093/plankt/fbac072

Eloísa M Giménez, A. Nocera, B. Temperoni, G. Winkler

{"title":"Appendicularians and marine snow in situ vertical distribution in Argentinean Patagonia","authors":"Eloísa M Giménez, A. Nocera, B. Temperoni, G. Winkler","doi":"10.1093/plankt/fbac072","DOIUrl":"https://doi.org/10.1093/plankt/fbac072","url":null,"abstract":"\u0000 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 a pycnocline at ~ 40 m. Appendicularians dominated in the upper 65 m with a condensed pattern above the pycnocline at high chlorophyll a concentrations, matching the subsurface chlorophyll maximum layer at ~ 20 m. Our results suggest the absence of vertical migration of appendicularians. Marine snow, strongly correlated with appendicularians, showed high concentrations above the pycnocline, whereas fecal pellets from krill were distributed throughout the water column. Discarded houses of appendicularians or their mucus fragments were the main components of marine snow aggregates, with phytoplankton, detritus and krill pellets also contributing. Nanoplankton dominated over microplankton, with vertical distribution patterns that might depend on local grazing pressure and advective processes. Our study, the first one in the region using underwater imagery, emphasizes the leading contribution of appendicularians to marine snow aggregates in the San Jorge Gulf and their potential implications in the bentho-pelagic coupling.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44190891","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}

引用次数: 0