Journal of Plankton Research最新文献_第2页

High prey capture efficiencies of oceanic epipelagic lobate and cestid ctenophores 大洋上层裂片栉水母和栉水母的高猎物捕获效率

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-09-14 DOI: 10.1093/plankt/fbae044

Taylor Child, John H Costello, Brad J Gemmell, Kelly R Sutherland, Sean P Colin

{"title":"High prey capture efficiencies of oceanic epipelagic lobate and cestid ctenophores","authors":"Taylor Child, John H Costello, Brad J Gemmell, Kelly R Sutherland, Sean P Colin","doi":"10.1093/plankt/fbae044","DOIUrl":"https://doi.org/10.1093/plankt/fbae044","url":null,"abstract":"Ctenophores are numerically dominant members of oceanic epipelagic communities around the world. The ctenophore community is often comprised of several common, co-occurring lobate and cestid genera. Previous quantifications of the amount of fluid that lobate ctenophores entrain in their feeding currents revealed that oceanic lobates have the potential for high feeding rates. In order to more directly examine the trophic role of oceanic lobate ctenophores, we quantified the encounter and retention efficiencies of several co-occurring species (Bolinopsis vitrea, Ocyropsis crystallina, Eurhamphea vexilligera and Cestum veneris) in their natural environments. Encounters and predator–prey interactions were video recorded in the field using specialized cameras and SCUBA techniques. The lobate species encountered, on average, 2.4 prey per minute and ingested 40% of these prey. This translated to an estimated ingestion rate of close to 1 prey per minute. Cestum veneris and most of the lobate species retained prey as efficiently as the voracious coastal lobate predator Mnemiopsis leidyi, suggesting that these oceanic species have a similar predation impact in their environments as M. leidyi does in coastal ecosystems. Hence, quantified in situ predatory-prey interactions indicate that epipelagic ctenophores have a significant impact on oceanic ecosystems worldwide.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"4 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249651","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

Dietary plasticity in small Arctic copepods as revealed with prey metabarcoding 用猎物代谢编码揭示北极小型桡足类的膳食可塑性

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-09-05 DOI: 10.1093/plankt/fbae042

Snorre Flo, Camilla Svensen, Kim Præbel, Bodil Annikki Bluhm, Anna Vader

{"title":"Dietary plasticity in small Arctic copepods as revealed with prey metabarcoding","authors":"Snorre Flo, Camilla Svensen, Kim Præbel, Bodil Annikki Bluhm, Anna Vader","doi":"10.1093/plankt/fbae042","DOIUrl":"https://doi.org/10.1093/plankt/fbae042","url":null,"abstract":"Objectives Small copepods (&lt;2 mm) compose an important constituent of the Arctic marine food web, but their trophic interactions remain largely unexplored, partly due to methodological limitations. Methods We here characterize the prey of the abundant cyclopoid Oithona similis, harpacticoid Microsetella norvegica and calanoid Microcalanus spp. from the Arctic Barents Sea and Nansen Basin during four seasons using brute force prey metabarcoding of the 18S rRNA gene. Key findings Chaetognaths were unexpectedly the most consistently identified taxa and composed 47% of all prey reads. Some taxa were seasonally important, including diatoms in April–May (43%), dinoflagellates in December (15%) and March (17%), and urochordates in August (20%). Compositional differences among species were also discernible, and the M. norvegica diet was significantly different from both O. similis and Microcalanus spp. The diets varied nevertheless more with season than species despite the inherent trophic traits that distinguish the ambush-predator O. similis, chemosensoric particle-chaser M. norvegica and current-feeding Microcalanus spp. Conclusions Our results thus indicate that dietary plasticity is common in small Arctic copepods, regardless of their behaviors or strategies for finding sustenance. We further hypothesize that such plasticity is an important adaptation in systems where prey availability is highly seasonal.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"13 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212470","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

Spring resting egg production of the calanoid copepod, Eurytemora affinis, in a freshet-dominated estuary 淡水河口桡足类(Eurytemora affinis)春季休眠产卵情况

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-07-20 DOI: 10.1093/plankt/fbae039

Joanne Breckenridge, Evgeny Pakhomov

{"title":"Spring resting egg production of the calanoid copepod, Eurytemora affinis, in a freshet-dominated estuary","authors":"Joanne Breckenridge, Evgeny Pakhomov","doi":"10.1093/plankt/fbae039","DOIUrl":"https://doi.org/10.1093/plankt/fbae039","url":null,"abstract":"Seasonal peaks in river discharge, such as snowmelt-dominated freshets, are predictable events that can have a large effect on flushing rates and salinity in estuaries. Resting eggs, which many coastal and estuarine copepods produce for overwintering or aestivation, could also serve to bridge predictable peaks in river discharge. We assessed the timing of resting egg production of the egg-carrying estuarine copepod, Eurytemora affinis (Poppe), in relation to river discharge in the Fraser River Estuary, Canada. Approximately 30 field-collected females were individually incubated on 12 occasions over the period February 2015–May 2016. Eurytemora affinis abundance and population structure were investigated from vertical net tow samples collected twice monthly to monthly. Resting eggs occurred primarily in May 2015 and May 2016 (6.5 and 9.2 eggs day−1, respectively), a month prior to peak flows, and the proportion of offspring that were resting eggs increased with river discharge. Eurytemora affinis reached a minimum abundance in July 2015, when the population was dominated by adults (86%). Resting egg production in E. affinis is typically considered an overwintering mechanism but we suggest that the ultimate driver of resting egg production in this population is avoidance of flushing and/or low salinities.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"92 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740688","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

Impact of light and nutrient availability on the phagotrophic activity of harmful bloom-forming dinoflagellates 光照和营养供应对形成有害藻华的甲藻吞噬活动的影响

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-07-17 DOI: 10.1093/plankt/fbae038

Catalina Mena, Marc Long, Ophélie Lorand, Pascale Malestroit, Emilie Rabiller, Jean-François Maguer, Stéphane L’helguen, Aurore Regaudie De Gioux

{"title":"Impact of light and nutrient availability on the phagotrophic activity of harmful bloom-forming dinoflagellates","authors":"Catalina Mena, Marc Long, Ophélie Lorand, Pascale Malestroit, Emilie Rabiller, Jean-François Maguer, Stéphane L’helguen, Aurore Regaudie De Gioux","doi":"10.1093/plankt/fbae038","DOIUrl":"https://doi.org/10.1093/plankt/fbae038","url":null,"abstract":"Phagotrophy is a key nutritional mode for many bloom-forming dinoflagellates that can supplement their carbon and nutrient requirements. However, the environmental drivers and ecological relevance of phagotrophy in algal blooms are still poorly understood. This study evaluates the effect of light and nutrient availability on the phagotrophic activity of three common bloom-forming dinoflagellates (Alexandrium minutum, Heterocapsa triquetra and Prorocentrum micans) using three fluorescently labeled preys: bacteria, Synechococcus and the haptophyte Isochrysis galbana. The three dinoflagellates exhibited distinct responses to light and nutrient availability in terms of growth, cell size, prey ingestion and preference. A. minutum and H. triquetra showed higher cell-specific ingestion rates on bacteria (0.53 ± 0.13 and 1.64 ± 0.39 prey dinoflagellate−1 h−1, respectively) under co-limited nutrient and light availability, whereas P. micans showed higher ingestion on Synechococcus (0.93 ± 0.22 prey dinoflagellate−1 h−1) under low-light availability alone. However, the three dinoflagellates exhibited the highest carbon and nitrogen-specific ingestion rates when feeding on the larger prey I. galbana. Our findings indicate that phagotrophy could be of advantage in short periods of light or nutrient limitation and may play different roles during the development of blooms, likely influencing the energy transfer through the food web.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"4 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740690","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

Variation in defensive spines across juvenile instars of Daphnia magna 大型蚤幼体中防御刺的变化

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-07-13 DOI: 10.1093/plankt/fbae033

Patricia Diel, Marvin Kiene, Christian Laforsch

{"title":"Variation in defensive spines across juvenile instars of Daphnia magna","authors":"Patricia Diel, Marvin Kiene, Christian Laforsch","doi":"10.1093/plankt/fbae033","DOIUrl":"https://doi.org/10.1093/plankt/fbae033","url":null,"abstract":"Various species of freshwater zooplankton feature defensive spines, spikes or spinules across a comparatively wide size range. Among those is Daphnia magna, which has previously been found to express an enhanced spinescence in response to the predatory tadpole shrimp Triops cancriformis. This involves an elongated tail-spine, further protruding fornices and elongated, as well as further spread spinules along its carapace margins. Of these, the predator-induced trait changes concerning the spinules of D. magna at the age of first reproduction are known. However, their morphological development throughout the juvenile instars, in comparison to the changes of the prominent tail spine during the same periods, has thus far been unclear. Our study shows that D. magna expresses spinules across all investigated juvenile instars. Furthermore, during ontogeny, the development of D. magna’s rather small spinescence traits, i.e. the dorsal and ventral mean spinule length, as well as the dorsal spinules bearing area, in response to predation pressure, differs distinctly from that of the prominent tail-spine. Thus, our study provides further insight into the connectedness of traits contributing to the overall defensively enhanced spinescence of D. magna, with possible implications for the functional benefit of the traits at certain developmental periods.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"22 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141608652","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

A database of nutritional strategies of nanoplankton genera present in North American lake surface waters 北美湖泊表层水纳米浮游生物营养策略数据库

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-07-10 DOI: 10.1093/plankt/fbae035

Philippe Le Noac’h, Beatrix E Beisner

引用次数: 0

Correction to: Under ice plankton and lipid dynamics in a subarctic lake. 更正：一个亚北极湖泊的冰下浮游生物和脂质动力学。

IF 1.9 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-06-28 eCollection Date: 2024-07-01 DOI: 10.1093/plankt/fbae037

引用次数: 0

Understanding the picture: the promise and challenges of in-situ imagery data in the study of plankton ecology 了解图片：现场图像数据在浮游生物生态学研究中的前景与挑战

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-06-20 DOI: 10.1093/plankt/fbae023

Alex Barth, Joshua Stone

{"title":"Understanding the picture: the promise and challenges of in-situ imagery data in the study of plankton ecology","authors":"Alex Barth, Joshua Stone","doi":"10.1093/plankt/fbae023","DOIUrl":"https://doi.org/10.1093/plankt/fbae023","url":null,"abstract":"Planktons are a fundamental piece of all ocean ecosystems yet, sampling plankton at the high resolution required to understand their dynamics remains a challenge. In-situ imaging tools offer an approach to sample plankton at fine scales. Advances in technology and methodology provide the ability to make in-situ imaging a common tool in plankton ecology. Despite the massive potential of in-situ imaging tools, there are no standard approaches for analyzing the associated data. Consequently, studies are inconsistent in analyzing in-situ imaging data, even for similar questions. This introduces challenges in comparing across studies and sampling devices. In this review, we briefly summarize the increasing use, potential and novel applications of in-situ imaging tools in plankton ecology. Then, we synthesize the common analyses used across these studies. Finally, we address the major statistical challenges associated with the unique sampling mechanisms of in-situ imaging tools and discuss the theoretical uncertainties, which arise from the low-sampling volumes of many in-situ imaging tools. To fully unlock the power of in-situ imaging tools in plankton ecological studies, researchers must carefully consider how to analyze their data. We provide recommendations for processing and analyzing data while also acknowledging a large need for developing new statistical tool.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"138 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507711","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

Ocean-colour anomalies quantified by the human eye. 人眼量化的海洋颜色异常。

IF 1.9 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-06-07 eCollection Date: 2024-07-01 DOI: 10.1093/plankt/fbae027

Robert J W Brewin, Giorgio Dall'Olmo

引用次数: 0

Optimal phenology of life history events in Calanus finmarchicus: exit from diapause in relation to interannual variation in spring bloom timing and predation. 鸬鹚生活史事件的最佳物候学：与春暖花开时间和捕食的年际变化有关的休眠期退出。

IF 1.9 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-06-07 eCollection Date: 2024-07-01 DOI: 10.1093/plankt/fbae028

Thomas R Anderson, Dag O Hessen, Wendy C Gentleman, Andrew Yool, Daniel J Mayor

{"title":"Optimal phenology of life history events in Calanus finmarchicus: exit from diapause in relation to interannual variation in spring bloom timing and predation.","authors":"Thomas R Anderson, Dag O Hessen, Wendy C Gentleman, Andrew Yool, Daniel J Mayor","doi":"10.1093/plankt/fbae028","DOIUrl":"10.1093/plankt/fbae028","url":null,"abstract":"Respiration of lipids by copepods during diapause (overwintering dormancy) contributes to ocean carbon sequestration via the seasonal lipid pump (SLP). Parameterizing this flux in predictive models requires a mechanistic understanding of how life history adaptation in copepods shapes their timing of exit from diapause. We investigate the optimal phenology of Calanus finmarchicus in the Norwegian Sea using an individual-based model in which diapause exit is represented as a trait characterized by phenotypic mean and variance. Without interannual variability, optimal exit correlated with the onset of the spring phytoplankton bloom and phenotypic variance was of no benefit. In contrast, copepods endured reduced fitness and adopted bet-hedging strategies when exposed to interannual variability in bloom timing and predation: later exit from diapause and phenotypic variance maintained adult numbers in anomalous late-bloom years. Exit nevertheless remained well before the peak of the bloom which is a favorable strategy when low predation early in the year enhances survival of eggs and early developmental stages. Our work highlights the complex interactions between C. finmarchicus and its environment and the need for improved understanding of bet-hedging strategies and the cues of diapause exit to progress the representation of the SLP in global biogeochemical models.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"46 4","pages":"439-451"},"PeriodicalIF":1.9,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11290252/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141875074","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