Journal of Phycology最新文献_第7页

Validation of the names Cavernulicolales, Cavernulicolaceae, Cavernulicola, and Cavernulicola chilensis (Rhodophyta) 验证 Cavernulicolales、Cavernulicolaceae、Cavernulicola 和 Cavernulicola chilensis（红藻纲）的名称

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-04-08 DOI: 10.1111/jpy.13452

Hwan Su Yoon, Emanuele Del Guacchio

引用次数: 0

The effect of sedimentation on spore settlement and recruitment of the endemic Arctic kelp, Laminaria solidungula (Phaeophyceae) 沉积作用对北极特有海藻固体层藻孢子沉降和繁殖的影响

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-04-05 DOI: 10.1111/jpy.13453

Jaide Phelps, Kenneth Dunton, Brenda Konar, Schery Umanzor, Arley Muth, Katrin Iken

{"title":"The effect of sedimentation on spore settlement and recruitment of the endemic Arctic kelp, Laminaria solidungula (Phaeophyceae)","authors":"Jaide Phelps, Kenneth Dunton, Brenda Konar, Schery Umanzor, Arley Muth, Katrin Iken","doi":"10.1111/jpy.13453","DOIUrl":"10.1111/jpy.13453","url":null,"abstract":"Environmental changes associated with rapid climate change in the Arctic, such as the increased rates of sedimentation from climatic or anthropogenic sources, can enhance the impact of abiotic stressors on coastal ecosystems. High sedimentation rates can be detrimental to nearshore kelp abundance and distribution, possibly due to increased mortality at the spore settlement stage. Spore settlement and viability of the Arctic kelp Laminaria solidungula were examined through a series of lab-based sedimentation experiments. Spores were exposed to increasing sediment loads in three experimental designs simulating different sedimentation scenarios: sediment deposition above settled spores, settlement of spores on sediment-covered substrate, and simultaneous suspension of spores and sediments during settlement. Spore settlement was recorded upon completion of each experiment, and gametophyte abundance was assessed following a growth period with sediments removed to examine short-term spore viability via a gametophyte-to-settled-spore ratio. In all three types of sediment exposure, the addition of sediments caused a 30%–40% reduction in spore settlement relative to a no-sediment control. Spore settlement decreased significantly between the low and high sediment treatments when spores were settled onto sediment-covered substrates. In all experiments, increasing amounts of sediment had no significant effect on spore viability, indicating that spores that had settled under different short-term sediment conditions were viable. Our results indicate that depending on spore-sediment interaction type, higher rates of sedimentation resulting from increased sediment loading could affect L. solidungula spore settlement success with potential impacts on the long-term persistence of a diverse and productive benthic habitat.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576162","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

Quantifying pigment content in crustose coralline algae using hyperspectral imaging: A case study with Tethysphytum antarcticum (Ross Sea, Antarctica) 利用高光谱成像技术量化壳状珊瑚藻的色素含量：Tethysphytum antarcticum（南极罗斯海）案例研究。

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-04-01 DOI: 10.1111/jpy.13449

Juan C. Montes-Herrera, Emiliano Cimoli, Vonda J. Cummings, Roberta D'Archino, Wendy A. Nelson, Arko Lucieer, Vanessa Lucieer

{"title":"Quantifying pigment content in crustose coralline algae using hyperspectral imaging: A case study with Tethysphytum antarcticum (Ross Sea, Antarctica)","authors":"Juan C. Montes-Herrera, Emiliano Cimoli, Vonda J. Cummings, Roberta D'Archino, Wendy A. Nelson, Arko Lucieer, Vanessa Lucieer","doi":"10.1111/jpy.13449","DOIUrl":"10.1111/jpy.13449","url":null,"abstract":"Crustose coralline algae (CCA) are a highly diverse group of habitat-forming, calcifying red macroalgae (Rhodophyta) with unique adaptations to diverse irradiance regimes. A distinctive CCA phenotype adaptation, which allows them to maximize photosynthetic performance in low light, is their content of a specific group of light-harvesting pigments called phycobilins. In this study, we assessed the potential of noninvasive hyperspectral imaging (HSI) in the visible spectrum (400–800 nm) to describe the phenotypic variability in phycobilin content of an Antarctic coralline, Tethysphytum antarcticum (Hapalidiales), from two distinct locations. We validated our measurements with pigment extractions and spectrophotometry analysis, in addition to DNA barcoding using the psbA marker. Targeted spectral indices were developed and correlated with phycobilin content using linear mixed models (R2 = 0.64–0.7). Once applied to the HSI, the models revealed the distinct phycoerythrin spatial distribution in the two site-specific CCA phenotypes, with thin and thick crusts, respectively. This study advances the capabilities of hyperspectral imaging as a tool to quantitatively study CCA pigmentation in relation to their phenotypic plasticity, which can be applied in laboratory studies and potentially in situ surveys using underwater hyperspectral imaging systems.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.13449","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140336083","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

Crocosphaera watsonii – A widespread nitrogen-fixing unicellular marine cyanobacterium Crocosphaera watsonii - 一种广泛存在的单细胞海洋固氮蓝藻

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-03-29 DOI: 10.1111/jpy.13450

Takako Masuda, Jan Mareš, Takuhei Shiozaki, Keisuke Inomura, Amane Fujiwara, Ondřej Prášil

{"title":"Crocosphaera watsonii – A widespread nitrogen-fixing unicellular marine cyanobacterium","authors":"Takako Masuda, Jan Mareš, Takuhei Shiozaki, Keisuke Inomura, Amane Fujiwara, Ondřej Prášil","doi":"10.1111/jpy.13450","DOIUrl":"10.1111/jpy.13450","url":null,"abstract":"Crocosphaera watsonii is a unicellular N2-fixing (diazotrophic) cyanobacterium observed in tropical and subtropical oligotrophic oceans. As a diazotroph, it can be a source of bioavailable nitrogen (N) to the microbial community in N-limited environments, and this may fuel primary production in the regions where it occurs. Crocosphaera watsonii has been the subject of intense study, both in culture and in field populations. Here, we summarize the current understanding of the phylogenetic and physiological diversity of C. watsonii, its distribution, and its ecological niche. Analysis of the relationships among the individual Crocosphaera species and related free-living and symbiotic lineages of diazotrophs based on the nifH gene have shown that the C. watsonii group holds a basal position and that its sequence is more similar to Rippkaea and Zehria than to other Crocosphaera species. This finding warrants further scrutiny to determine if the placement is related to a horizontal gene transfer event. Here, the nifH UCYN-B gene copy number from a recent synthesis effort was used as a proxy for relative C. watsonii abundance to examine patterns of C. watsonii distribution as a function of environmental factors, like iron and phosphorus concentration, and complimented with a synthesis of C. watsonii physiology. Furthermore, we have summarized the current knowledge of C. watsonii with regards to N2 fixation, photosynthesis, and quantitative modeling of physiology. Because N availability can limit primary production, C. watsonii is widely recognized for its importance to carbon and N cycling in ocean ecosystems, and we conclude this review by highlighting important topics for further research on this important species.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.13450","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140323686","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

Syncopation and synchrony: Phenological dynamics of Pyropia nereocystis (Bangiophyceae) in central California 同步与同步：加利福尼亚中部 Pyropia nereocystis（Bangiophyceae）的物候动态。

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-03-29 DOI: 10.1111/jpy.13448

Daniel J. Gossard

{"title":"Syncopation and synchrony: Phenological dynamics of Pyropia nereocystis (Bangiophyceae) in central California","authors":"Daniel J. Gossard","doi":"10.1111/jpy.13448","DOIUrl":"10.1111/jpy.13448","url":null,"abstract":"Pyropia nereocystis is an annual northeastern Pacific-bladed bangialean species whose macroscopic stage epiphytized the annual canopy forming bull kelp Nereocystis luetkeana. I examined three in situ facets of these epiphyte-host dynamics in the central California region: (1) spatial and temporal variation in the presence of P. nereocystis epiphytes as a function of host density, (2) the relationship between individual host morphology and epiphytic P. nereocystis biomass, and (3) the ecophysiological growth ramifications for subtidal transplants of both life stages of P. nereocystis. Swath canopy surveys and whole host collections were conducted at five sites between November 2017 and February 2019. Additionally, transplants of P. nereocystis gametophytes and sporophytes were conducted across multiple subtidal depths. I observed temporal changes in the proportions of hosts epiphytized by P. nereocystis, with differences in seasonal persistence of P. nereocystis among sites and between years. Biomass of P. nereocystis was positively correlated with individual host stipe length, stipe surface area, and the primary principal component (PC) of stipe morphometrics denoted by principal component analysis (PCA). Gametogenesis in P. nereocystis epiphytes was spatially heterogeneous and limited for the 2018–2019 cohort due to comprehensive removal of hosts by the February 2019 sampling period. Transplants of P. nereocystis gametophytes yielded similar growth responses among depths, and sporophyte (conchocelis) transplant areal growth was positively correlated with transplant depth. These findings detail spatiotemporal complexity and multi-scale (individual, site, and whole region) phenological nuances for central Californian P. nereocystis epiphytes.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.13448","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140318534","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

Comparative nutrient drawdown capacities of farmed kelps and implications of metabolic strategy and nutrient source 养殖海带的营养吸取能力比较以及代谢策略和营养来源的影响。

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-03-28 DOI: 10.1111/jpy.13442

Tiffany Stephens, Schery Umanzor

{"title":"Comparative nutrient drawdown capacities of farmed kelps and implications of metabolic strategy and nutrient source","authors":"Tiffany Stephens, Schery Umanzor","doi":"10.1111/jpy.13442","DOIUrl":"10.1111/jpy.13442","url":null,"abstract":"Seaweed aquaculture, particularly kelp farming, is a popular topic as a potential solution for mitigating anthropogenic pollutants and enhancing coastal drawdown of carbon and nitrogen. Using a common garden approach, this study evaluated nutrient drawdown capacities of Alaria marginata (ribbon kelp) and Saccharina latissima (sugar kelp) across four commercial kelp farms in Southeast and Southcentral Alaska. Our findings show that A. marginata exhibited ~30% more carbon and 21% more nitrogen content compared to S. latissima. These results demonstrate the potential for A. marginata to serve as a more efficient species for nutrient drawdown into farmed kelp tissues (per unit biomass) for consideration of potential mitigative actions. The efficacy of this drawdown is likely to be driven by the careful pairing of kelp species with farming environment. Temporally, there was a noted increase in carbon content and a decline in nitrogen content from March to May for both species, consistent with known seasonal nutrient dynamics in coastal waters. Notably, differences in the carbon stable isotope signatures (δ13C) between the kelps may hint at variations in metabolic pathways and nutrient sourcing, particularly concerning the preferential assimilation of CO2 versus <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>HCO</mi>\u0000 <mn>3</mn>\u0000 <mo>−</mo>\u0000 </msubsup>\u0000 </mrow>\u0000 </semantics></math>, and highlight the need for further work on this topic for applied macroalgal research.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140318533","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

Marine protected areas can be useful but are not a silver bullet for kelp conservation 海洋保护区可能有用，但不是保护海带的灵丹妙药。

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-03-28 DOI: 10.1111/jpy.13446

Karen Filbee-Dexter, Samuel Starko, Albert Pessarrodona, Georgina Wood, Kjell Magnus Norderhaug, Cristina Piñeiro-Corbeira, Thomas Wernberg

{"title":"Marine protected areas can be useful but are not a silver bullet for kelp conservation","authors":"Karen Filbee-Dexter, Samuel Starko, Albert Pessarrodona, Georgina Wood, Kjell Magnus Norderhaug, Cristina Piñeiro-Corbeira, Thomas Wernberg","doi":"10.1111/jpy.13446","DOIUrl":"10.1111/jpy.13446","url":null,"abstract":"Kelp forests are among the most valuable ecosystems on Earth, but they are increasingly being degraded and lost due to a range of human-related stressors, leading to recent calls for their improved management and conservation. One of the primary tools to conserve marine species and biodiversity is the establishment of marine protected areas (MPAs). International commitments to protect 30% of the world's ecosystems are gaining momentum, offering a promising avenue to secure kelp forests into the Anthropocene. However, a clear understanding of the efficacy of MPAs for conserving kelp forests in a changing ocean is lacking. In this perspective, we question whether strengthened global protection will create meaningful conservation outcomes for kelp forests. We explore the benefits of MPAs for kelp conservation under a suite of different stressors, focusing on empirical evidence from protected kelp forests. We show that MPAs can be effective against some drivers of kelp loss (e.g., overgrazing, kelp harvesting), particularly when they are maintained in the long-term and enforced as no-take areas. There is also some evidence that MPAs can reduce impacts of climate change through building resilience in multi-stressor situations. However, MPAs also often fail to provide protection against ocean warming, marine heatwaves, coastal darkening, and pollution, which have emerged as dominant drivers of kelp forest loss globally. Although well-enforced MPAs should remain an important tool to protect kelp forests, successful kelp conservation will require implementing an additional suite of management solutions that target these accelerating threats.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.13446","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140306019","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

Revealing the algicidal characteristics of Maribacter dokdonensis: An investigation into bacterial strain P4 isolated from Karenia mikimotoi bloom water 揭示多孔菌的杀藻特性：对从 Karenia mikimotoi 水华中分离出的细菌菌株 P4 的研究。

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-03-22 DOI: 10.1111/jpy.13441

Thomas Chun-Hung Lee, Winnie Lam, Nora Fung-Yee Tam, Steven Jing-Liang Xu, Wing Lam Chung, Fred Wang-Fat Lee

{"title":"Revealing the algicidal characteristics of Maribacter dokdonensis: An investigation into bacterial strain P4 isolated from Karenia mikimotoi bloom water","authors":"Thomas Chun-Hung Lee, Winnie Lam, Nora Fung-Yee Tam, Steven Jing-Liang Xu, Wing Lam Chung, Fred Wang-Fat Lee","doi":"10.1111/jpy.13441","DOIUrl":"10.1111/jpy.13441","url":null,"abstract":"Harmful algal blooms (HABs) are a global environmental concern, causing significant economic losses in fisheries and posing risks to human health. Algicidal bacteria have been suggested as a potential solution to control HABs, but their algicidal efficacy is influenced by various factors. This study aimed to characterize a novel algicidal bacterium, Maribacter dokdonensis (P4), isolated from a Karenia mikimotoi (Hong Kong strain, KMHK) HAB and assess the impact of P4 and KMHK's doses, growth phase, and algicidal mode and the axenicity of KMHK on P4's algicidal effect. Our results demonstrated that the algicidal effect of P4 was dose-dependent, with the highest efficacy at a dose of 25% v/v. The study also determined that P4's algicidal effect was indirect, with the P4 culture and the supernatant, but not the bacterial cells, showing significant effects. The algicidal efficacy was higher when both P4 and KMHK were in the stationary phase. Furthermore, the P4 culture at the log phase could effectively kill KMHK cells at the stationary phase, with higher algicidal efficacy in the bacterial culture than that of the supernatant alone. Interestingly, P4's algicidal efficacy was significantly higher when co-culturing with xenic KMHK (~90% efficacy at day 1) than that with the axenic KMHK (~50% efficacy at day 1), suggesting the presence of other bacteria could regulate P4's algicidal effect. The bacterial strain P4 also exhibited remarkable algicidal efficacy on four other dinoflagellate species, particularly the armored species. These results provide valuable insights into the algicidal effect of M. dokdonensis on K. mikimotoi and on their interactions.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140184743","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

A critical review of soil algae as a crucial soil biological component of high ecological and economic significance 对土壤藻类这一具有重要生态和经济意义的关键土壤生物成分的深入研究

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-03-19 DOI: 10.1111/jpy.13444

Jebin Joseph, Joseph George Ray

{"title":"A critical review of soil algae as a crucial soil biological component of high ecological and economic significance","authors":"Jebin Joseph, Joseph George Ray","doi":"10.1111/jpy.13444","DOIUrl":"10.1111/jpy.13444","url":null,"abstract":"Aero-terrestrial algae are ecologically and economically valuable bioresources contributing to carbon sequestration, sustenance of soil health, and fertility. Compared to aquatic algae, the literature on subaerial algae is minimal, including studies of distinctive habitats such as forest soils, agricultural fields, deserts, polar regions, specific subaerial zones, artificial structures, and tropical soils. The primary goal here was to identify the gaps and scope of research on such algae. Accordingly, the literature was analyzed per sub-themes, such as the “nature of current research data on terrestrial algae,” “methodological approaches,” “diversity,” “environmental relationships,” “ecological roles,” and “economic significance.” The review showed there is a high diversity of algae in soils, especially members belonging to the Cyanophyta (Cyanobacteria) and Chlorophyta. Algal distributions in terrestrial environments depend on the microhabitat conditions, and many species of soil algae are sensitive to specific soil conditions. The ecological significance of soil algae includes primary production, the release of biochemical stimulants and plant growth promoters into soils, nitrogen fixation, solubilization of minerals, and the enhancement and maintenance of soil fertility. Since aero-terrestrial habitats are generally stressed environments, algae of such environments can be rich in rare metabolites and natural products. For example, epilithic soil algae use wet adhesive molecules to fix them firmly on the substratum. Exploring the ecological roles and economic utility of soil and other subaerial algae could be helpful for the development of algae-based industries and for achieving sustainable soil management.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140167300","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

Divide and conquer: Spatial and temporal resource partitioning structures benthic cyanobacterial mats 分而治之：底栖蓝藻垫的时空资源分配结构。

IF 2.9 3区生物学

Journal of Phycology Pub Date : 2024-03-11 DOI: 10.1111/jpy.13443

Maya E. Powell, Sophie J. McCoy

引用次数: 0