Journal of Phycology最新文献

Effect of sulfate availability on phytoplankton stoichiometry. 硫酸盐有效性对浮游植物化学计量学的影响。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-25 DOI: 10.1111/jpy.70053

Mariona Segura-Noguera, Zuoxi Ruan, Mario Giordano

{"title":"Effect of sulfate availability on phytoplankton stoichiometry.","authors":"Mariona Segura-Noguera, Zuoxi Ruan, Mario Giordano","doi":"10.1111/jpy.70053","DOIUrl":"https://doi.org/10.1111/jpy.70053","url":null,"abstract":"Sulfur (S) is a key element in multiple metabolic pathways of phytoplankton cells. The effect of S availability on phytoplankton elemental quotas and stoichiometry has been addressed in few studies, using a limited number of species and with contradictory results. Using high-temperature combustion oxidation and X-ray fluorescence methods, we measured the concentrations of micro- and trace elements in monocultures of 20 marine phytoplankton species, grown with different sulfate concentrations representing those of early and modern oceans. We found that, independently from the sulfate concentration in the media, the red lineage species had higher S quotas than those of the green lineage, resulting in lower C:S (93) and higher S:P (1.06) than the green lineage species (226 and 0.76, respectively). This suggests a genetic constraint in the S quota and aligns with the sulfate facilitation hypothesis, shedding light on a metabolic basis for the expansion of the red lineage algae and their current dominance in ocean waters. We also have shown a physiological response of phytoplankton cells to different sulfate availability, by either decreasing phosphorus or increasing zinc quotas. The P response was more characteristic in the red lineage, with higher S requirements and metabolic S fluxes, while the Zn response was independent of genotypic constraints or plastid type.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144484783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Winners and losers under hydroxide-based ocean alkalinity enhancement in a Tasmanian plankton community. 塔斯马尼亚浮游生物群落在氢氧基海洋碱度增强下的赢家和输家。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-21 DOI: 10.1111/jpy.70052

Kiyas Kousoulas, Aaron Ferderer, Ruth Eriksen, Lennart T Bach

{"title":"Winners and losers under hydroxide-based ocean alkalinity enhancement in a Tasmanian plankton community.","authors":"Kiyas Kousoulas, Aaron Ferderer, Ruth Eriksen, Lennart T Bach","doi":"10.1111/jpy.70052","DOIUrl":"10.1111/jpy.70052","url":null,"abstract":"Ocean alkalinity enhancement (OAE) is an emerging carbon dioxide CO2 removal approach for climate change mitigation and can be implemented with various alkaline materials that convert dissolved CO2 into (bi)carbonates, enabling additional atmospheric CO2 removal. A key knowledge gap is how alkaline materials affect marine life. This study investigated effects of OAE via sodium hydroxide (NaOH) on a coastal Tasmanian plankton community. Natural communities were enclosed within microcosms assigned to three groups: a control, an unequilibrated treatment (NaOH addition), and an equilibrated treatment (NaOH and sodium bicarbonate (NaHCO3) addition). The unequilibrated treatment simulates carbonate chemistry changes before atmospheric CO2 uptake and the equilibrated treatment the changes thereafter. Treatments increased alkalinity by ~25% (+500 μmol · kg-1), theoretically enabling a 21% increase in the marine inorganic carbon sink. Hydroxide-based OAE had minimal effects on the plankton community in the equilibrated treatment, in which CO2 and pH excursions were small. In the unequilibrated treatment, we observed a slight delay in the phytoplankton bloom, arguably because NaOH addition caused reorganization in the diatom community before the bloom reached its maximum chlorophyll a level. Although the community remained diatom-dominant, community composition was moderately different from the control and equilibrated treatments. The zooplankton community displayed no detectable change except for the invasive Noctiluca scintillans, which became less abundant in the unequilibrated treatment, arguably due to phytoplankton community shifts. We concluded changes in plankton community composition observed were relatively small compared to the rather extreme hydroxide-based alkalinity perturbation and the profound climatic benefit of such a CO2 sink enhancement.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144340233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nutrient-driven growth and microbiome shifts in the brown alga Sargassum fluitans III. 营养驱动的褐藻生长和微生物组的变化。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-20 DOI: 10.1111/jpy.70045

Tom Theirlynck, Lotte Staat, Dhaishendra Servania, Aschwin H Engelen, Brigitta I van Tussenbroek, Gerard Muyzer, Petra M Visser, Linda Amaral-Zettler

{"title":"Nutrient-driven growth and microbiome shifts in the brown alga Sargassum fluitans III.","authors":"Tom Theirlynck, Lotte Staat, Dhaishendra Servania, Aschwin H Engelen, Brigitta I van Tussenbroek, Gerard Muyzer, Petra M Visser, Linda Amaral-Zettler","doi":"10.1111/jpy.70045","DOIUrl":"10.1111/jpy.70045","url":null,"abstract":"Since 2011, holopelagic Sargassum has been accumulating in a region of the tropical Atlantic now referred to as the Great Atlantic Sargassum Belt (GASB). Among the hypothesized contributors to these accumulations are the increased inputs of nitrogen (N) and phosphorus (P) in the tropical Atlantic Ocean. Little is known about the effects of N and P additions on Sargassum physiology and its microbiome. We studied the effects of N, P, and NP additions on the growth, photosynthetic efficiency, and microbiome composition of Sargassum fluitans III in a six-day experiment on the Caribbean Island of Curaçao. Sargassum fluitans III took up most nitrate and phosphate within 3 days with respective uptake rates of 0.343 and 0.0399 μmol · g-1 DW · h-1. Fv/Fm decreased in the control after 6 days but remained constant in nutrient treatments. Growth rates did not differ significantly among treatments, but a trend in higher growth rates in the NP treatment was discerned, suggesting a possible NP co-limitation. The relative abundance of epiphytic Cyanobacteria such as Schizothrix and bacteria such as Lentilitoribacter increased under N and P addition, while heterotrophic Rhodobacteraceae decreased in abundance. Microeukaryotic communities responded with varying changes in alpha diversity, possibly steered by increased photosynthesis and growth of S. fluitans III or bacterial interactions. The physiological response to N and P and rapid change of the microbiome demonstrates that the studied S. fluitans III can quickly benefit from increased nutrient concentrations, which might contribute to its growth success in the GASB.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144333372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reminiscent of the pre-diatom? A hitherto undescribed scaly bolidophyte Lepidoparma frigida gen. et sp. nov. in a new order Lepidoparmales based on morphology, phylogeny, and ecology. 让人想起前硅藻？基于形态学、系统发育和生态学研究的鳞片硬蝗新目：冷鳞鳞蝗。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-19 DOI: 10.1111/jpy.70043

Shiho Kamakura, Kazumasa Yamada, Eldrin D L R Arguelles, Akira Kuwata, Tamotsu Nagumo, Masakazu Takahashi, Ken Sawada, Mutsuo Ichinomiya, Shinya Sato

{"title":"Reminiscent of the pre-diatom? A hitherto undescribed scaly bolidophyte Lepidoparma frigida gen. et sp. nov. in a new order Lepidoparmales based on morphology, phylogeny, and ecology.","authors":"Shiho Kamakura, Kazumasa Yamada, Eldrin D L R Arguelles, Akira Kuwata, Tamotsu Nagumo, Masakazu Takahashi, Ken Sawada, Mutsuo Ichinomiya, Shinya Sato","doi":"10.1111/jpy.70043","DOIUrl":"https://doi.org/10.1111/jpy.70043","url":null,"abstract":"The class Bolidophyceae, which consists of small phytoplankton distributed worldwide, is the sister group of diatoms. This class has contained only one order, the Parmales, until now. In this study, we established a new order Lepidoparmales Kamakura & S.Sato ord. nov. and a new family Lepidoparmaceae Kamakura & S.Sato fam. nov., within the Bolidophyceae, and described Lepidoparma frigida Kamakura & S.Sato gen. et sp. nov. from the Sea of Okhotsk. We conducted a comprehensive comparison of L. frigida with diatoms and other parmaleans through analysis of its molecular phylogeny, morphology, ultrastructure, ontogeny, distribution, and lipid composition. The cell surface of L. frigida is covered with numerous siliceous scales with radial patterns similar to centric diatom valves; this character distinguishes it from other known parmaleans. Intriguingly, its appearance resembles the hypothesized \"pre-diatom,\" which was proposed to be a precursor to primitive diatoms. The discovery and characterization of L. frigida will provide valuable insights into the evolutionary processes of both diatoms and bolidophytes and shed light on their common ancestor.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extensive diversity of Symbiochlorum-related algae from environmental sequences and culture strains supports the description of the new family Symbiochloraceae (Ulvophyceae, Chlorophyta). 从环境序列和培养菌株中发现的与共生氯相关的藻类的广泛多样性支持了共生氯科（Ulvophyceae，绿藻门）新科的描述。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-17 DOI: 10.1111/jpy.70046

Heroen Verbruggen, Sanqiang Gong, Kefu Yu, Kshitij Tandon, Francesco Ricci, Jiayuan Liang

{"title":"Extensive diversity of Symbiochlorum-related algae from environmental sequences and culture strains supports the description of the new family Symbiochloraceae (Ulvophyceae, Chlorophyta).","authors":"Heroen Verbruggen, Sanqiang Gong, Kefu Yu, Kshitij Tandon, Francesco Ricci, Jiayuan Liang","doi":"10.1111/jpy.70046","DOIUrl":"https://doi.org/10.1111/jpy.70046","url":null,"abstract":"The genus Symbiochlorum, initially described from a single strain isolated from a coral in the South China Sea, was shown to be a sister lineage of Ignatius within the green algal order Ignatiales. Its significant phylogenetic divergence from Ignatius raises the possibility of its classification as a new family. To further investigate this hypothesis, we conducted a more elaborate analysis of sequence diversity within the Symbiochlorum clade. We aligned the 18S nuclear ribosomal DNA gene sequences of newly isolated Symbiochlorum culture strains from coral in the South China Sea and environmental sequences from the Great Barrier Reef. Strains isolated from Porites lutea coral colonies exhibited morphological similarities to typical S. hainanense (CCTCC M2018096). Analysis of the 18S nuclear ribosomal DNA gene revealed substantial diversity in both the V4 and V9 regions of the gene, with sequences clustering into two distinct lineages. Lineage 1 (L1), represented solely by environmental sequences from Great Barrier Reef sediment samples, displayed high levels of sequence divergence (2.2%-5.8%), suggesting it consists of multiple species. Lineage 2 (L2) included coral-derived strains and environmental sequences from the South China Sea and the Great Barrier Reef, as well as an ascidian-associated strain from Palau. The significant divergence between L1 and L2 (3.1%-9.1%) suggests they represent different genera. Based on these results, we propose the recognition of the new family Symbiochloraceae within the Ignatiales order.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144317181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The phycosphere's promise: Algae and bacteria rewrite biotechnology's rules 藻圈的前景：藻类和细菌改写了生物技术的规则

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-16 DOI: 10.1111/jpy.70029

Pannaga Pavan Jutur

引用次数: 0

Insights into the origins of calcification from coccolithophore life cycles 从球石藻生命周期看钙化起源

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-16 DOI: 10.1111/jpy.70036

Glen L. Wheeler

引用次数: 0

Starved of phosphate, diatoms reprogram terpenoid production 由于缺乏磷酸盐，硅藻重组了萜类化合物的生产

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-16 DOI: 10.1111/jpy.70037

Steffaney M. Wood-Rocca

引用次数: 0

Rapid population recovery of a foundation species from experimental small-scale harvesting. 实验小规模采伐后基础种种群的快速恢复。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-16 DOI: 10.1111/jpy.70048

Eliseo Fica-Rojas, Daniela N López, Alejandro Pérez-Matus, Nelson Valdivia

{"title":"Rapid population recovery of a foundation species from experimental small-scale harvesting.","authors":"Eliseo Fica-Rojas, Daniela N López, Alejandro Pérez-Matus, Nelson Valdivia","doi":"10.1111/jpy.70048","DOIUrl":"https://doi.org/10.1111/jpy.70048","url":null,"abstract":"Ecological stability is central to understanding how disturbances challenge the persistence of populations and communities through time, especially when key species are impacted. The bull kelp Durvillaea incurvata is a foundation, habitat-forming species that provides food and shelter for various species and supports the livelihoods of human communities along the Chilean coast. Harvesting of Durvillaea has raised concerns about the long-term viability of its populations, but the stability responses of Durvillaea to anthropogenic disturbances remain unclear. Here, we conducted a manipulative experiment in which we removed, once, all Durvillaea individuals from two sites in southern Chile to simulate the spatial scale of harvesting and to describe the population resilience and recovery following disturbance. In 1-m2 plots interspersed in matrices of dense Durvillaea stands, we removed fronds and holdfasts, a practice not typically developed by gatherers, testing an alternative harvesting strategy. For 25 months, we quantified Durvillaea recruitment, holdfast densities, percent cover, frond length and density, biomass, and population size structure. All metrics completely recovered within 5-7 months across sites. The removal of Durvillaea did not have a significant impact on recruitment, which was constant during the experiment. The small spatial scale of the disturbances, the constant recruits supplied by the surrounding bull kelp matrix, and the removal of holdfasts that released settlement substratum allowed for the strong stability responses in these populations. Therefore, harvesting strategies that promote spatial heterogeneity, such as the removal of whole individuals at a small spatial scale, should be prioritized in management schemes of natural seaweed stands.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144302415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Too cool to bloom? How Raphidiopsis handles the chill 太酷而不能开花？Raphidiopsis是如何应对寒冷的

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-06-16 DOI: 10.1111/jpy.70042

Ronojoy Hem

引用次数: 0