首页 > 最新文献

Journal of Phycology最新文献

英文 中文
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 3.4 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY 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

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.

自2011年以来,全浮游马尾藻一直在热带大西洋的一个地区积累,现在被称为大大西洋马尾藻带(GASB)。在这些积累的假设贡献者中,热带大西洋中氮(N)和磷(P)的输入增加。氮磷添加量对马尾藻生理和微生物组的影响尚不清楚。在加勒比海库拉帕拉奥岛进行了为期6天的实验,研究了氮、磷和NP添加对马尾藻生长、光合效率和微生物组组成的影响。3 d内,尾藻对硝酸盐和磷酸盐的吸收率分别为0.343和0.0399 μmol·g-1 DW·h-1。6天后,对照组的Fv/Fm下降,而营养处理的Fv/Fm保持不变。不同处理之间的生长速率没有显著差异,但在NP处理中有较高生长速率的趋势,这表明可能存在NP共同限制。添加氮磷后,附生蓝藻(Schizothrix)和细菌(Lentilitoribacter)的相对丰度增加,异养红杆菌(Rhodobacteraceae)的相对丰度降低。微真核生物群落对α多样性的变化做出了不同的反应,这可能是由增加的光合作用和流感球菌III的生长或细菌相互作用所引导的。对N和P的生理反应和微生物组的快速变化表明,所研究的流感链球菌III可以迅速受益于增加的营养浓度,这可能有助于其在GASB中成功生长。
{"title":"Nutrient-driven growth and microbiome shifts in the brown alga Sargassum fluitans III","authors":"Tom Theirlynck,&nbsp;Lotte Staat,&nbsp;Dhaishendra Servania,&nbsp;Aschwin H. Engelen,&nbsp;Brigitta I. van Tussenbroek,&nbsp;Gerard Muyzer,&nbsp;Petra M. Visser,&nbsp;Linda Amaral-Zettler","doi":"10.1111/jpy.70045","DOIUrl":"10.1111/jpy.70045","url":null,"abstract":"<p>Since 2011, holopelagic <i>Sargassum</i> has been accumulating in a region of the tropical Atlantic now referred to as the Great Atlantic <i>Sargassum</i> 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 <i>Sargassum</i> physiology and its microbiome. We studied the effects of N, P, and NP additions on the growth, photosynthetic efficiency, and microbiome composition of <i>Sargassum fluitans</i> III in a six-day experiment on the Caribbean Island of Curaçao. <i>Sargassum fluitans</i> III took up most nitrate and phosphate within 3 days with respective uptake rates of 0.343 and 0.0399 μmol · g<sup>−1</sup> DW · h<sup>−1</sup>. <i>F</i>v/<i>F</i>m 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 <i>Schizothrix</i> and bacteria such as <i>Lentilitoribacter</i> increased under N and P addition, while heterotrophic <i>Rhodobacteraceae</i> decreased in abundance. Microeukaryotic communities responded with varying changes in alpha diversity, possibly steered by increased photosynthesis and growth of <i>S. fluitans</i> III or bacterial interactions. The physiological response to N and P and rapid change of the microbiome demonstrates that the studied <i>S. fluitans</i> III can quickly benefit from increased nutrient concentrations, which might contribute to its growth success in the GASB.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 4","pages":"933-950"},"PeriodicalIF":3.4,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70045","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":"OA","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 3.4 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY 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

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.

硅藻纲是硅藻的姐妹类群,由分布在世界各地的小型浮游植物组成。到目前为止,这个类只包含一个目,即parmale。本文建立了镰仓鳞翅目(Kamakura & s.s atto)和镰仓鳞翅目(Kamakura & s.s atto)新科。并描述了镰仓Lepidoparma frigida & s.s atto gen. et sp. 11 .来自鄂霍次克海。从分子系统发育、形态、超微结构、个体发育、分布、脂质组成等方面,对冷乳藻与硅藻及其他帕尔玛藻进行了全面比较。冷乳藻的细胞表面覆盖着大量的硅质鳞片,呈放射状,类似于中心硅藻瓣;这一特点使它有别于其他已知的帕玛尔干酪。有趣的是,它的外观类似于假设的“前硅藻”,它被认为是原始硅藻的前身。该植物的发现和鉴定将为硅藻和固体植物的进化过程提供有价值的见解,并阐明它们的共同祖先。
{"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,&nbsp;Kazumasa Yamada,&nbsp;Eldrin D. L. R. Arguelles,&nbsp;Akira Kuwata,&nbsp;Tamotsu Nagumo,&nbsp;Masakazu Takahashi,&nbsp;Ken Sawada,&nbsp;Mutsuo Ichinomiya,&nbsp;Shinya Sato","doi":"10.1111/jpy.70043","DOIUrl":"10.1111/jpy.70043","url":null,"abstract":"<p>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 &amp; S.Sato ord. nov. and a new family Lepidoparmaceae Kamakura &amp; S.Sato fam. nov., within the Bolidophyceae, and described <i>Lepidoparma frigida</i> Kamakura &amp; S.Sato gen. et sp. nov. from the Sea of Okhotsk. We conducted a comprehensive comparison of <i>L. frigida</i> with diatoms and other parmaleans through analysis of its molecular phylogeny, morphology, ultrastructure, ontogeny, distribution, and lipid composition. The cell surface of <i>L. frigida</i> 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 <i>L. frigida</i> will provide valuable insights into the evolutionary processes of both diatoms and bolidophytes and shed light on their common ancestor.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 4","pages":"757-776"},"PeriodicalIF":3.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70043","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":"OA","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 3.4 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-17 DOI: 10.1111/jpy.70046
Heroen Verbruggen, Sanqiang Gong, Kefu Yu, Kshitij Tandon, Francesco Ricci, Jiayuan Liang

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.

共生藻属,最初是从中国南海的一种珊瑚中分离出来的单一菌株中描述的,被证明是绿藻目伊格内修斯的姐妹谱系。其显著的系统发育差异,从伊格内修提出了其分类为一个新的家庭的可能性。为了进一步研究这一假设,我们对共生绿枝的序列多样性进行了更详细的分析。我们将新分离的南海珊瑚共生藻培养菌株的18S核糖体DNA基因序列与大堡礁环境序列进行比对。从Porites lutea珊瑚菌落中分离的菌株与典型海南螺(CCTCC M2018096)形态相似。对18S核糖体DNA基因的分析显示,该基因的V4和V9区域存在大量多样性,序列聚类为两个不同的谱系。谱系1 (L1)仅以来自大堡礁沉积物样品的环境序列为代表,显示出较高的序列分化水平(2.2% ~ 5.8%),表明它由多物种组成。谱系2 (L2)包括来自南中国海和大堡礁的珊瑚衍生菌株和环境序列,以及来自帕劳的海鞘相关菌株。L1和L2之间的显著差异(3.1%-9.1%)表明它们代表不同的属。在此基础上,我们提出了一个新的科,即共生藻科(Symbiochloraceae)。
{"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,&nbsp;Sanqiang Gong,&nbsp;Kefu Yu,&nbsp;Kshitij Tandon,&nbsp;Francesco Ricci,&nbsp;Jiayuan Liang","doi":"10.1111/jpy.70046","DOIUrl":"10.1111/jpy.70046","url":null,"abstract":"<p>The genus <i>Symbiochlorum</i>, initially described from a single strain isolated from a coral in the South China Sea, was shown to be a sister lineage of <i>Ignatius</i> within the green algal order Ignatiales. Its significant phylogenetic divergence from <i>Ignatius</i> 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 <i>Symbiochlorum</i> clade. We aligned the 18S nuclear ribosomal DNA gene sequences of newly isolated <i>Symbiochlorum</i> culture strains from coral in the South China Sea and environmental sequences from the Great Barrier Reef. Strains isolated from <i>Porites lutea</i> coral colonies exhibited morphological similarities to typical <i>S. hainanense</i> (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.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 4","pages":"926-932"},"PeriodicalIF":3.4,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70046","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":"OA","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 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-16 DOI: 10.1111/jpy.70029
Pannaga Pavan Jutur
{"title":"The phycosphere's promise: Algae and bacteria rewrite biotechnology's rules","authors":"Pannaga Pavan Jutur","doi":"10.1111/jpy.70029","DOIUrl":"https://doi.org/10.1111/jpy.70029","url":null,"abstract":"","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 3","pages":"440-442"},"PeriodicalIF":2.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292450","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
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 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-16 DOI: 10.1111/jpy.70036
Glen L. Wheeler
{"title":"Insights into the origins of calcification from coccolithophore life cycles","authors":"Glen L. Wheeler","doi":"10.1111/jpy.70036","DOIUrl":"https://doi.org/10.1111/jpy.70036","url":null,"abstract":"","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 3","pages":"463-465"},"PeriodicalIF":2.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292459","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
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 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-16 DOI: 10.1111/jpy.70037
Steffaney M. Wood-Rocca
{"title":"Starved of phosphate, diatoms reprogram terpenoid production","authors":"Steffaney M. Wood-Rocca","doi":"10.1111/jpy.70037","DOIUrl":"https://doi.org/10.1111/jpy.70037","url":null,"abstract":"","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 3","pages":"509-511"},"PeriodicalIF":2.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292629","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
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 3.4 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-16 DOI: 10.1111/jpy.70048
Eliseo Fica-Rojas, Daniela N. López, Alejandro Pérez-Matus, Nelson Valdivia

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.

生态稳定性对于理解干扰如何挑战种群和群落的持久性至关重要,特别是当关键物种受到影响时。牛海带Durvillaea incurvata是一种基础、栖息地形成物种,为各种物种提供食物和住所,并支持智利沿海人类社区的生计。采收杜鹃引起了人们对其种群长期生存能力的担忧,但杜鹃对人为干扰的稳定性反应尚不清楚。在这里,我们进行了一项操纵实验,我们从智利南部的两个地点移除了一次所有的Durvillaea个体,以模拟采伐的空间尺度,并描述种群的恢复能力和干扰后的恢复。在分布在密集的杜鹃林基质中的1平方米的地块上,我们移除了叶子和支架,这是采集者通常不采用的做法,以测试另一种收获策略。在25个月的时间里,我们量化了杜鹃的增收、持枝密度、盖度、叶长和密度、生物量和种群大小结构。所有指标在5-7个月内完全恢复。去除Durvillaea对招募没有显著影响,招募在实验中是恒定的。干扰的小空间尺度,周围牛海带基质提供的持续新成员,以及释放沉降基质的固定物的移除,使得这些种群具有强烈的稳定性反应。因此,在天然海藻林的管理方案中,应优先考虑促进空间异质性的收获策略,如在小空间尺度上对整个个体进行移除。
{"title":"Rapid population recovery of a foundation species from experimental small-scale harvesting","authors":"Eliseo Fica-Rojas,&nbsp;Daniela N. López,&nbsp;Alejandro Pérez-Matus,&nbsp;Nelson Valdivia","doi":"10.1111/jpy.70048","DOIUrl":"10.1111/jpy.70048","url":null,"abstract":"<p>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 <i>Durvillaea incurvata</i> 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 <i>Durvillaea</i> has raised concerns about the long-term viability of its populations, but the stability responses of <i>Durvillaea</i> to anthropogenic disturbances remain unclear. Here, we conducted a manipulative experiment in which we removed, once, all <i>Durvillaea</i> 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-m<sup>2</sup> plots interspersed in matrices of dense <i>Durvillaea</i> stands, we removed fronds and holdfasts, a practice not typically developed by gatherers, testing an alternative harvesting strategy. For 25 months, we quantified <i>Durvillaea</i> 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 <i>Durvillaea</i> 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.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 4","pages":"1023-1037"},"PeriodicalIF":3.4,"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 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-16 DOI: 10.1111/jpy.70042
Ronojoy Hem
{"title":"Too cool to bloom? How Raphidiopsis handles the chill","authors":"Ronojoy Hem","doi":"10.1111/jpy.70042","DOIUrl":"https://doi.org/10.1111/jpy.70042","url":null,"abstract":"","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 3","pages":"485-487"},"PeriodicalIF":2.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292628","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
Comprehensive profiling of freshwater microalgae from southeastern Bangladesh: Morphological, molecular, and nutritional insights 孟加拉国东南部淡水微藻的综合分析:形态学、分子和营养见解。
IF 3.4 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-13 DOI: 10.1111/jpy.70050
Sifatun Nur, Trina Das, Mahima Ranjan Acharjee, Subeda Newase, Mohammad Ekramul Haque, Sadia Afrin, Homaira Pervin Heema, Amam Zonaed Siddiki, Helena Khatoon

Microalgae are natural producers of essential nutrients and pigments for both human and animal nutrition as well as medical applications. This study aimed to characterize some microalgae by their taxonomy and biochemical composition. Molecular techniques were used to categorize the microalgal strains into the genera of Chlorococcum, Coccomyxa, and Ochromonas. Subsequently, microalgal growth under laboratory conditions was assessed and the microalgal cells were harvested to determine the pigments, proximate composition, fatty acid, and amino acid profiles. The findings indicated that the cell densities of Coccomyxa sp. and Ochromonas sp. were nearly identical. Additionally, all microalgae exhibited chlorophyll a as the main pigment component, whereas Coccomyxa sp. and Chlorococcum sp. showed significantly highest (p < 0.05) chlorophyll a (7.79 ± 0.07 μg · mL−1) and chlorophyll b (2.74 ± 0.002 μg · mL−1), respectively. Significantly higher (p < 0.05) carotenoid and total phycobiliproteins content were found in Ochromonas sp. Furthermore, Coccomyxa sp. was determined to have significantly higher (p < 0.05) protein (31.9% ± 0.46% dry weight) and lipid content (18.2% ± 1.34% dry weight), while the maximum carbohydrate was detected for Ochromonas sp. (29.2% ± 0.1% dry weight). Lastly, essential amino acid (EAA) levels were considerably higher (p < 0.05) in Chlorococcum sp.; however, Coccomyxa sp. produced more polyunsaturated fatty acids (PUFA) in comparison to the other experimental species. The results indicate that the investigated microalgae possess immense potential as multi-nutrient sources and can be optimized for sustainable application in aquaculture, pharmaceuticals, and nutraceutical industries.

微藻是人类和动物营养以及医疗应用的必需营养素和色素的天然生产者。本研究旨在通过微藻的分类和生化组成对其进行表征。利用分子技术将微藻菌株分为绿藻属、Coccomyxa属和Ochromonas属。随后,在实验室条件下评估微藻的生长情况,收获微藻细胞以确定色素、近似组成、脂肪酸和氨基酸谱。结果表明,Coccomyxa sp.和Ochromonas sp.的细胞密度几乎相同。此外,所有微藻均以叶绿素a为主要色素成分,其中Coccomyxa sp.和Chlorococcum sp.的叶绿素b含量最高(p -1)(2.74±0.002 μg·mL-1)。显著升高(p)
{"title":"Comprehensive profiling of freshwater microalgae from southeastern Bangladesh: Morphological, molecular, and nutritional insights","authors":"Sifatun Nur,&nbsp;Trina Das,&nbsp;Mahima Ranjan Acharjee,&nbsp;Subeda Newase,&nbsp;Mohammad Ekramul Haque,&nbsp;Sadia Afrin,&nbsp;Homaira Pervin Heema,&nbsp;Amam Zonaed Siddiki,&nbsp;Helena Khatoon","doi":"10.1111/jpy.70050","DOIUrl":"10.1111/jpy.70050","url":null,"abstract":"<p>Microalgae are natural producers of essential nutrients and pigments for both human and animal nutrition as well as medical applications. This study aimed to characterize some microalgae by their taxonomy and biochemical composition. Molecular techniques were used to categorize the microalgal strains into the genera of <i>Chlorococcum</i>, <i>Coccomyxa</i>, and <i>Ochromonas</i>. Subsequently, microalgal growth under laboratory conditions was assessed and the microalgal cells were harvested to determine the pigments, proximate composition, fatty acid, and amino acid profiles. The findings indicated that the cell densities of <i>Coccomyxa</i> sp. and <i>Ochromonas</i> sp. were nearly identical. Additionally, all microalgae exhibited chlorophyll <i>a</i> as the main pigment component, whereas <i>Coccomyxa</i> sp. and <i>Chlorococcum</i> sp. showed significantly highest (<i>p</i> &lt; 0.05) chlorophyll <i>a</i> (7.79 ± 0.07 μg · mL<sup>−1</sup>) and chlorophyll <i>b</i> (2.74 ± 0.002 μg · mL<sup>−1</sup>), respectively. Significantly higher (<i>p</i> &lt; 0.05) carotenoid and total phycobiliproteins content were found in <i>Ochromonas</i> sp. Furthermore, <i>Coccomyxa</i> sp. was determined to have significantly higher (<i>p</i> &lt; 0.05) protein (31.9% ± 0.46% dry weight) and lipid content (18.2% ± 1.34% dry weight), while the maximum carbohydrate was detected for <i>Ochromonas</i> sp. (29.2% ± 0.1% dry weight). Lastly, essential amino acid (EAA) levels were considerably higher (<i>p</i> &lt; 0.05) in <i>Chlorococcum</i> sp.; however, <i>Coccomyxa</i> sp. produced more polyunsaturated fatty acids (PUFA) in comparison to the other experimental species. The results indicate that the investigated microalgae possess immense potential as multi-nutrient sources and can be optimized for sustainable application in aquaculture, pharmaceuticals, and nutraceutical industries.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 4","pages":"1007-1022"},"PeriodicalIF":3.4,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285050","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
To plant or not to plant? Nutrient uptake, growth, and biochemistry of eucheumatoids under low salinity as influenced by nutrient-rich freshwater outflow 种还是不种?富营养淡水流出对低盐度条件下拟真金鱼的营养吸收、生长和生物化学的影响。
IF 3.4 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY Pub Date : 2025-06-12 DOI: 10.1111/jpy.70044
Jonh Rey L. Gacura, Bienson Ceasar V. Narvarte, Emmanuel M. Mendoza, Lourie Ann R. Hinaloc, Ronel T. Aguilar, Eugene Yolanda Irang-Maxion, Shienna Mae C. Gonzaga, Michael Y. Roleda

Seaweeds can be negatively affected by low salinity, but the negative impacts may be ameliorated by the presence of high nutrient levels from the freshwater inputs. We tested this hypothesis on the eucheumatoids Kappaphycus alvarezii, K. striatus, and Eucheuma denticulatum by determining their nutrient uptake, growth, and biochemical responses to experimental treatments of lowering salinity with a consequent increase in nutrient concentrations. Ambient seawater with varying salinity and nutrient concentrations was sourced offshore (O) and nearshore (N) and diluted with nutrient-replete natural spring water to obtain six (6) treatments: O-LN-34, O-MN-30, O-HN-27, N-MN-30, N-HN-27, and N-HN-24 (corresponding to water source-relative nutrient concentration- salinity, where LN = low nutrient; MN = medium nutrient; HN = high nutrient). Nutrient uptake varied among inorganic nutrient species and different eucheumatoid species. All eucheumatoids showed uptake preference for NH4+ regardless of the treatment while NO3 uptake was generally higher in treatments with higher NO3 concentration. Growth rates were species-specific but generally higher at lower salinities with higher nutrient concentrations. Total soluble carbohydrate, total protein, and total polyphenol content did not significantly vary among treatments, except for E. denticulatum. These results provide insights into the potential of farming eucheumatoids nearshore with fluctuating salinity provided that the freshwater outflow is nutrient-rich to ameliorate the negative effects of low salt concentration.

海藻可能受到低盐度的负面影响,但淡水输入的高营养水平可能会减轻这种负面影响。我们在拟真金马Kappaphycus alvarezii, K. striatus和Eucheuma denticulatum上测试了这一假设,通过测定它们的营养吸收,生长和对降低盐度的实验处理的生化反应,从而增加营养浓度。不同盐度和营养物浓度的环境海水分别来自近海(O)和近岸(N),用富含营养物的天然泉水稀释,得到6个处理:O- mn -34、O- mn -30、O- hn -27、N- mn -30、N- hn -27和N- hn -24(对应于水源相对营养物浓度-盐度,LN =低营养物;MN =培养基养分;HN =高营养)。无机营养物种类和拟真金草种类间的养分吸收存在差异。不论处理方式如何,拟真金草均表现出对NH4 +的吸收偏好,而NO3 -的吸收在NO3 -浓度较高的处理中普遍较高。生长速率是物种特有的,但在较低的盐度和较高的营养浓度下,生长速率通常较高。总可溶性碳水化合物、总蛋白质和总多酚含量在不同处理间差异不显著,但小齿蕨除外。如果流出的淡水富含营养,可以改善低盐浓度的负面影响,那么这些结果将有助于了解在盐度波动的近岸养殖拟真金鱼的潜力。
{"title":"To plant or not to plant? Nutrient uptake, growth, and biochemistry of eucheumatoids under low salinity as influenced by nutrient-rich freshwater outflow","authors":"Jonh Rey L. Gacura,&nbsp;Bienson Ceasar V. Narvarte,&nbsp;Emmanuel M. Mendoza,&nbsp;Lourie Ann R. Hinaloc,&nbsp;Ronel T. Aguilar,&nbsp;Eugene Yolanda Irang-Maxion,&nbsp;Shienna Mae C. Gonzaga,&nbsp;Michael Y. Roleda","doi":"10.1111/jpy.70044","DOIUrl":"10.1111/jpy.70044","url":null,"abstract":"<p>Seaweeds can be negatively affected by low salinity, but the negative impacts may be ameliorated by the presence of high nutrient levels from the freshwater inputs. We tested this hypothesis on the eucheumatoids <i>Kappaphycus alvarezii</i>, <i>K. striatus</i>, and <i>Eucheuma denticulatum</i> by determining their nutrient uptake, growth, and biochemical responses to experimental treatments of lowering salinity with a consequent increase in nutrient concentrations. Ambient seawater with varying salinity and nutrient concentrations was sourced offshore (O) and nearshore (N) and diluted with nutrient-replete natural spring water to obtain six (6) treatments: O-LN-34, O-MN-30, O-HN-27, N-MN-30, N-HN-27, and N-HN-24 (corresponding to water source-relative nutrient concentration- salinity, where LN = low nutrient; MN = medium nutrient; HN = high nutrient). Nutrient uptake varied among inorganic nutrient species and different eucheumatoid species. All eucheumatoids showed uptake preference for NH<sub>4</sub><sup>+</sup> regardless of the treatment while NO<sub>3</sub><sup>−</sup> uptake was generally higher in treatments with higher NO<sub>3</sub><sup>−</sup> concentration. Growth rates were species-specific but generally higher at lower salinities with higher nutrient concentrations. Total soluble carbohydrate, total protein, and total polyphenol content did not significantly vary among treatments, except for <i>E. denticulatum</i>. These results provide insights into the potential of farming eucheumatoids nearshore with fluctuating salinity provided that the freshwater outflow is nutrient-rich to ameliorate the negative effects of low salt concentration.</p>","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 4","pages":"911-925"},"PeriodicalIF":3.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144275180","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
期刊
Journal of Phycology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1