Journal of Plankton Research最新文献_第2页

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

Large-scale culturing of the subpolar foraminifera Globigerina bulloides reveals tolerance to a large range of environmental parameters associated to different life-strategies and an extended lifespan. 对亚极地有孔虫 Globigerina bulloides 的大规模培养揭示了其对与不同生命策略和延长寿命相关的大量环境参数的耐受性。

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/fbae029

Freya E Sykes, Julie Meilland, Adele Westgård, Thomas B Chalk, Melissa Chierici, Gavin L Foster, Mohamed M Ezat

{"title":"Large-scale culturing of the subpolar foraminifera Globigerina bulloides reveals tolerance to a large range of environmental parameters associated to different life-strategies and an extended lifespan.","authors":"Freya E Sykes, Julie Meilland, Adele Westgård, Thomas B Chalk, Melissa Chierici, Gavin L Foster, Mohamed M Ezat","doi":"10.1093/plankt/fbae029","DOIUrl":"10.1093/plankt/fbae029","url":null,"abstract":"The subtropical to subpolar planktic foraminifera Globigerina bulloides is a calcifying marine protist, and one of the dominant foraminiferal species of the Nordic Seas. Previously, the relative abundance and shell geochemistry of fossil G. bulloides have been studied for palaeoceanographic reconstructions. There is however a lack of biological observations on the species and a poor understanding of its ecological tolerances, especially for high latitude genotypes. Here, we present observations from the first extensive culturing of G. bulloides under subpolar conditions, including the first low temperature (6-13°C) and variable salinity (30-38) experiments. Carbonate chemistry (pH and [CO3 2-]) was also manipulated. Experimental conditions were chosen to reflect a range of plausible past and future scenarios for the Nordic Seas. We found G. bulloides to be tolerant of environmental conditions well outside their optimal range (<10°C, salinity <33, pH <8). Observed life span was up to three months, which was attributed to a microalgal diet. Two alternative life strategies were employed, whereby individuals either experienced rapid growth and death, or a prolonged lifespan with minimal growth and death via slow decay. We posit this could help explain differences in geochemical signals recorded from different size fractions of fossil specimens used for palaeoceanographic reconstructions.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"46 4","pages":"403-420"},"PeriodicalIF":1.9,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11290258/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141875072","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

Living at depth: ecophysiological condition of Boreomysis arctica in autumn and winter in the St. Lawrence estuary and gulf. 深海生活：圣劳伦斯河口和海湾秋冬季节北极鲂的生态生理状况。

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-05-16 eCollection Date: 2024-05-01 DOI: 10.1093/plankt/fbae022

Gesche Winkler, Jory Cabrol, Réjean Tremblay

{"title":"Living at depth: ecophysiological condition of Boreomysis arctica in autumn and winter in the St. Lawrence estuary and gulf.","authors":"Gesche Winkler, Jory Cabrol, Réjean Tremblay","doi":"10.1093/plankt/fbae022","DOIUrl":"10.1093/plankt/fbae022","url":null,"abstract":"Mysids, besides krill, play a significant role in energy transfer and carbon sequestration. The ecology of coastal species is better understood than that of deep dwelling species such as Boreomysis arctica. The objectives of this study were to quantify spatiotemporal variations in body condition and the trophic level of B. arctica in autumn and winter, under sea-ice conditions in the St. Lawrence system, using a multimarker approach. We sampled along a 1000 km transect. Mean abundances in winter were higher in the estuary compared to the Gulf of St. Lawrence. Body condition, measured as total lipid content, was higher in winter than in autumn. Lipids of B. arctica were mainly composed of wax esters, thereby B. arctica is richer in energetic lipids compared to the three dominant krill species. We also observed seasonal differences in the trophic level of B. arctica, revealing carnivorous behavior in autumn compared to omnivory in winter. High intra-specific variability in both energetic strategy and feeding behavior was found that is potentially due to opportunistic feeding. Energy rich reserves suggest that B. arctica could act as a valuable prey for both benthic and pelagic consumers and thus playing a key role in bentho-pelagic energy transfer.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"46 3","pages":"348-356"},"PeriodicalIF":2.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11142453/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141200216","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

Analysis of swimming trajectories in Daphnia similis as an environmental impact assessment tool 作为环境影响评估工具的水蚤游泳轨迹分析

IF 2.1 3区环境科学与生态学

Journal of Plankton Research Pub Date : 2024-05-06 DOI: 10.1093/plankt/fbae015

Rubens M Lopes, Marcia Akari, Leandro T De La Cruz, Marco Uttieri

{"title":"Analysis of swimming trajectories in Daphnia similis as an environmental impact assessment tool","authors":"Rubens M Lopes, Marcia Akari, Leandro T De La Cruz, Marco Uttieri","doi":"10.1093/plankt/fbae015","DOIUrl":"https://doi.org/10.1093/plankt/fbae015","url":null,"abstract":"Toxicity tests with daphnids are important tools in the environmental impact assessment of aquatic ecosystems. The aim of this study was to characterize the swimming paths of Daphnia similis in response to two concentrations of the reference substance potassium chloride (KCl), as an additional expedite tool in evaluating the effects of contaminants. Bidimensional trajectory coordinates were obtained with image acquisition and processing methods and used to calculate the following metrics of D. similis behavior: mean swimming speed, hop rate, fractal dimension, and vertical occupancy. The swimming speed, hop rate and fractal dimension for the control group were significantly different from the KCl treatment at the higher concentration. Conversely, the vertical occupancy did not differ between the experimental conditions. The results of this investigation validate the use of behavioral analysis as a rapid and reliable approach to evaluate water contamination, aiding in early warning detection of water quality issues. The method can be further refined through the integration of machine learning applications in video tracking.","PeriodicalId":16800,"journal":{"name":"Journal of Plankton Research","volume":"15 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887315","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