Botanica Marina最新文献

{"title":"Phylogeny and ecology of the green seaweed Ulva","authors":"S. Steinhagen, Thomas Wichard, Jonas Blomme","doi":"10.1515/bot-2024-0005","DOIUrl":"https://doi.org/10.1515/bot-2024-0005","url":null,"abstract":"","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140408272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Germanium dioxide as agent to control the biofouling diatom Fragilariopsis oceanica for the cultivation of Ulva fenestrata (Chlorophyta)","authors":"Ralf Rautenberger","doi":"10.1515/bot-2023-0075","DOIUrl":"https://doi.org/10.1515/bot-2023-0075","url":null,"abstract":"During the cultivation of <jats:italic>Ulva fenestrata</jats:italic> in a land-based aquaculture system, the colonisation of the water tanks’ surfaces and eventually the macroalgal biomass by the biofouling diatom <jats:italic>Fragilariopsis oceanica</jats:italic> compromises the production process. Since germanium dioxide (GeO<jats:sub>2</jats:sub>) is an effective growth inhibitor of diatoms, this study aimed to understand how it affects the presence of <jats:italic>F. oceanica</jats:italic> and the photosynthesis and growth of <jats:italic>U. fenestrata</jats:italic> as a primary parameter contribution to the biomass production. A toxicological dose-response experiment showed that the diatom’s growth was inhibited at the low GeO<jats:sub>2</jats:sub> concentration of 0.014 mg l<jats:sup>−1</jats:sup>. In contrast, the photosynthetic performances and growth rates of <jats:italic>U. fenestrata</jats:italic> remained unaffected under a wide GeO<jats:sub>2</jats:sub> concentration range (0.022–2.235 mg l<jats:sup>−1</jats:sup>) in small- and large-scale experiments in 1-l glass beakers and 100-l Plexiglass water tanks, respectively. In the latter, the diatom density in the tanks was reduced by 40 %. The costs arising from the use of GeO<jats:sub>2</jats:sub> can range between €2.35 and €8.35 kg<jats:sup>−1</jats:sup> fresh weight of produced <jats:italic>U. fenestrata</jats:italic> biomass under growth conditions resulting in growth rates of 20 and 11.5 % d<jats:sup>−1</jats:sup>, respectively. GeO<jats:sub>2</jats:sub> is an effective agent to control biofouling diatoms such as <jats:italic>F. oceanica</jats:italic> during the land-based biomass production of <jats:italic>U. fenestrata</jats:italic>.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139947136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Updating the Ulvaceae in the green seaweeds of Britain and Ireland","authors":"Christine A. Maggs, Anne R. Bunker, Francis St. P. D. Bunker, David Harries, John Kelly, Frédéric Mineur, Jaanika Blomster, Pilar Díaz-Tapia, Paul W. Gabrielson, Jeffery R. Hughey, Juliet Brodie","doi":"10.1515/bot-2023-0078","DOIUrl":"https://doi.org/10.1515/bot-2023-0078","url":null,"abstract":"The 2007 flora “Green Seaweeds of Britain and Ireland” did not present the molecular data underpinning the Ulvaceae treatment, mostly ITS sequences. Subsequently, names have changed as type material of <jats:italic>Ulva</jats:italic> species is sequenced and intensive sampling with DNA barcoding adds new European species. To update the Ulvaceae, we systematically sampled from 2007 to 2021, identifying specimens using various molecular markers alongside DNA from type material of four species. We show here that <jats:italic>Ulva gigantea</jats:italic>, based on <jats:italic>rbc</jats:italic>L, <jats:italic>tuf</jats:italic>A and ITS sequences of its holotype, is assigned to <jats:italic>Ulva compressa</jats:italic>, as is the lectotype of <jats:italic>Ulva curvata</jats:italic>. <jats:italic>Ulva gigantea</jats:italic> sensu GenBank and <jats:italic>Ulva pseudocurvata</jats:italic> are conspecific. The correct name is <jats:italic>U. pseudocurvata</jats:italic> based on <jats:italic>rbc</jats:italic>L sequences of the lectotype. Two species of monostromatic Ulvaceae were included in the 2007 flora, but we show that both of them and all earlier British monostromatic collections represent <jats:italic>Ulvaria splendens</jats:italic>, a species originally described from Alaska. Analysis of two <jats:italic>rbc</jats:italic>L amplicons of the <jats:italic>Ulva sordida</jats:italic> lectotype shows that it is conspecific with <jats:italic>Ulvaria splendens</jats:italic>. Our first genuine collections of <jats:italic>Ulvaria obscura</jats:italic> from SW England and SW Wales correspond to topotype material from the Bay of Biscay, recent samples from Galicia and unpublished <jats:italic>tuf</jats:italic>A sequences from Britanny.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139947135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taxonomic assessment of blade-forming Ulva species (Ulvales, Chlorophyta) in the Galápagos Archipelago, Ecuador using DNA sequencing","authors":"Paul W. Gabrielson, Anna Claire Smith, John F. Bruno, Todd J. Vision, Margarita Brandt","doi":"10.1515/bot-2023-0079","DOIUrl":"https://doi.org/10.1515/bot-2023-0079","url":null,"abstract":"DNA sequences were obtained from 32 blade-forming <jats:italic>Ulva</jats:italic> specimens collected in 2018 and 2019 from four islands in the Galápagos Archipelago: Fernandina, Floreana, Isabela and San Cristóbal. The loci sequenced were nuclear encoded ITS and plastid encoded <jats:italic>rbc</jats:italic>L and <jats:italic>tuf</jats:italic>A, all recognized as barcode markers for green algae. Four species were found, <jats:italic>Ulva adhaerens</jats:italic>, <jats:italic>U. lactuca</jats:italic>, <jats:italic>U. ohnoi</jats:italic> and <jats:italic>U. tanneri</jats:italic>, all of which have had their type specimens sequenced, ensuring the correct application of these names. Only one of these, <jats:italic>U. lactuca</jats:italic>, was reported historically from the archipelago. <jats:italic>Ulva adhaerens</jats:italic> was the species most commonly collected and widely distributed, occurring on all four islands. Previously known only from Japan and Korea, this is the first report of <jats:italic>U. adhaerens</jats:italic> from the southeast Pacific Ocean. <jats:italic>Ulva ohnoi</jats:italic> was collected on three islands, Isabela, Floreana, and San Cristóbal, and <jats:italic>U. lactuca</jats:italic> only on the last two. <jats:italic>Ulva tanneri</jats:italic> is a diminutive, 1–2 cm tall, high intertidal species that is easily overlooked, but likely far more common than the one specimen that was collected. This study of blade-forming <jats:italic>Ulva</jats:italic> species confirms that a concerted effort, using DNA sequencing, is needed to document the seaweed flora of the Galápagos Archipelago.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139904270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental gradients influence geographic differentiation and low genetic diversity of morphologically similar Ulva species in the Northwest Pacific","authors":"Kai-Le Zhong, Masanori Hiraoka, Xu Gao, Bayden Russell, Zi-Min Hu, Weizhou Chen, Ju-Hyoung Kim, Norishige Yotsukura, Hikaru Endo, Naohiro Oka, Shinya Yoshikawa, Juan Diego Gaitan-Espitia","doi":"10.1515/bot-2023-0073","DOIUrl":"https://doi.org/10.1515/bot-2023-0073","url":null,"abstract":"Species classified in the genus <jats:italic>Ulva</jats:italic> are important foundational marine primary producers distributed worldwide. These species are particularly abundant and diverse through the northwest Pacific (NWP) where they experience marked latitudinal gradients of environmental heterogeneity. It is unclear, however, to what extent such dynamic conditions can modulate phenotypic and genetic patterns in these organisms, potentially reflecting the influence of historical and contemporary biotic and abiotic factors. Here, we assessed inter- and intra-specific genetic patterns of <jats:italic>Ulva</jats:italic> species through the NWP using plastid <jats:italic>rbc</jats:italic>L and <jats:italic>tuf</jats:italic>A gene sequences. Although we initially targeted <jats:italic>Ulva australis</jats:italic> based on morphological identification, we recovered eight <jats:italic>Ulva</jats:italic> genetic entities masked by morphological similarities. Except for the <jats:italic>Ulva linza–procera–prolifera</jats:italic> and <jats:italic>U. lactuca–reticulata</jats:italic> complexes, six of these genetic entities were recovered as individual species (i.e., <jats:italic>U. australis</jats:italic>, <jats:italic>U. ohnoi</jats:italic>, <jats:italic>U. californica</jats:italic>, <jats:italic>U. compressa</jats:italic>, <jats:italic>U. lacinulata</jats:italic>, and <jats:italic>U. arasakii</jats:italic>), and showed biogeographic patterns likely explained by clines in sea surface temperature and ocean current dispersal. At intra-specific level, all the genetic entities showed low genetic variation and divergence based on <jats:italic>rbc</jats:italic>L (0–0.3 %) and <jats:italic>tuf</jats:italic> A (0–0.9 %) data. Our results provide insights regarding intra- and inter-specific genetic patterns characterizing morphologically similar <jats:italic>Ulva</jats:italic> species through the NWP. However, further studies are needed to understand the mechanisms underpinning such patterns and the associated ecological and evolutionary implications.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139765518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New morphological data for two rare species of sand-dwelling marine dinoflagellates, Amphidiniella sedentaria and Pachena cf. leibnizii","authors":"Marina S. Selina, Tatiana V. Morozova","doi":"10.1515/bot-2023-0092","DOIUrl":"https://doi.org/10.1515/bot-2023-0092","url":null,"abstract":"Benthic dinoflagellates have been the subject of extensive taxonomic research in recent decades. Studies of morphologies of already known species of benthic dinoflagellates from various geographical populations remain relevant, as these allow elucidation of some details that were overlooked in the original species descriptions or assessment of their morphological variability. In the present study, two rare species of dinoflagellates, <jats:italic>Amphidiniella sedentaria</jats:italic> and <jats:italic>Pachena</jats:italic> cf. <jats:italic>leibnizii</jats:italic>, have been studied, for the first time, from coastal sands of the northwestern Sea of Japan. In the cells of <jats:italic>A. sedentaria</jats:italic> from the Sea of Japan, we have found two anterior intercalar plates instead of one. Therefore, the original formula has been changed to APC 4′ 2a 7″ 5c 4s 6‴ 2⁗. As a result of the examination of <jats:italic>P</jats:italic>. cf. <jats:italic>leibnizii</jats:italic> from the Sea of Japan, we have counted seven precingular plates and six cingular plates, instead of six and five, respectively, indicated in the original description. The plate formula of the cells of <jats:italic>P</jats:italic>. cf. <jats:italic>leibnizii</jats:italic> from the Sea of Japan is APC 4′ 3a 7″ 6c 5s 5‴ 2⁗. It is currently difficult to judge whether these differences are morphological variations. Therefore, we have identified these cells as <jats:italic>P.</jats:italic> cf. <jats:italic>leibnizii.</jats:italic>","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139665272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalence history of morphological variants of Cerataulina resting spores in Indian Sundarbans and resultant phylogenetic analysis","authors":"Neera Sen Sarkar, Biswajit Biswas, Manjushree Mandal, Tapas Das, Sanoyaz Sekh","doi":"10.1515/bot-2023-0034","DOIUrl":"https://doi.org/10.1515/bot-2023-0034","url":null,"abstract":"Fifteen morphological variants of resting spores of the diatom <jats:italic>Cerataulina</jats:italic> are presented with morphometric characters and presence in different habitats over spatial and temporal regimes in the Indian Sundarbans. Spatial regime includes phytoplankton assemblages, river-bank surface sediments and different depths of short sediment cores of adjacent deltaic landmasses. The temporal regime spans a period of 2000 years BP to present times. Though <jats:italic>Cerataulina</jats:italic> is sporadically mentioned in a few publications as a planktonic form in the Sundarbans, this is the first report of its different resting spores from different habitats. The <jats:sup>14</jats:sup>C dating and calculated age within sediment cores suggest their existence in the system for 1996 years BP. Interestingly, even with the significant prevalence of resting spores throughout the spatial and temporal ranges, the live vegetative stage could only occasionally be documented in the phytoplankton assemblages over a period of 9 years from February 2013 to March 2023. The morphological variations of <jats:italic>Cerataulina</jats:italic> resting spores were subjected to cluster analysis using Dice’s Similarity Coefficient, based on the unweighted pair group method with arithmetic mean to indicate phylogenetic relationships. The results highlight two main clusters of resting spore morphotypes, namely <jats:italic>Cerataulina bicornis</jats:italic> (syn = <jats:italic>Cerataulina daemon</jats:italic>) and <jats:italic>Syringidium simplex</jats:italic>.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139422951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grazing of free-living Pylaiella littoralis by the amphipod Gammarus tigrinus","authors":"Steven L. Miller, Robert T. Wilce","doi":"10.1515/bot-2023-0088","DOIUrl":"https://doi.org/10.1515/bot-2023-0088","url":null,"abstract":"<jats:italic>Pylaiella littoralis</jats:italic> is a brown alga with a cosmopolitan distribution. A free-living form of the alga fouls the beaches of Nahant, Massachusetts (USA). The amphipod <jats:italic>Gammarus tigrinus</jats:italic> is found within the floating drifts of algae. Gut contents confirmed that <jats:italic>G. tigrinus</jats:italic> consumed <jats:italic>P. littoralis</jats:italic>. Significantly, culture studies revealed that ingested <jats:italic>P. littoralis</jats:italic> survives and grows from fecal pellets produced by <jats:italic>G. tigrinus</jats:italic>. Also, inefficient grazing produced vegetative fragments that grew and survived. <jats:italic>δ</jats:italic> <jats:sup>13</jats:sup>C values for the amphipods and <jats:italic>P. littoralis</jats:italic> averaged −17.4 ‰ and −17.7 ‰, respectively, suggesting that <jats:italic>G. tigrinus</jats:italic> acquires most of its carbon from <jats:italic>P. littoralis</jats:italic>.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139423082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chondrus retortus (Gigartinales, Rhodophyta) in Hawai‘i: a taxonomic and biogeographic puzzle","authors":"Ronald P. Kittle, Anne Veillet, William E. Schmidt, Suzanne Fredericq, Karla J. McDermid","doi":"10.1515/bot-2023-0019","DOIUrl":"https://doi.org/10.1515/bot-2023-0019","url":null,"abstract":"Members of the genus <jats:italic>Chondrus</jats:italic> are well-known from temperate and cold waters. <jats:italic>Chondrus ocellatus</jats:italic> Holmes was reported from Hawai‘i Island (19° N latitude) in 1999 as a new record based on vegetative and tetrasporangial characteristics. The first specimens were collected by Setchell in 1900 in Hilo, HI. The presence of a <jats:italic>Chondrus</jats:italic> species in the subtropics has been a phycological enigma for over 100 years. We addressed the question of species identity and biogeographic affinities of the Hawaiian <jats:italic>Chondrus</jats:italic> with fresh cystocarpic material, DNA samples, and phylogenetic analyses. Analysis and comparison of five genes (nuclear: EF2; plastid: <jats:italic>psb</jats:italic>A, <jats:italic>rbc</jats:italic>L, and 23S/UPA; mitochondrial: COI) from Hawaiian <jats:italic>Chondrus</jats:italic> and holotype and topotype material of 10 of the 11 accepted <jats:italic>Chondrus</jats:italic> species indicate that Hawaiian specimens are <jats:italic>C. retortus</jats:italic> Matsumoto <jats:italic>et</jats:italic> Shimada. However, unlike type material, the Hawaiian specimens are commonly pinnulate, vary significantly in secondary medullary filament density, and have mature cystocarps filling the entire medullary space. This study shows the value of using multi-gene loci and comparing multiple sequences of several species to confirm taxonomic conclusions. Our findings suggest that <jats:italic>C. retortus</jats:italic> may have immigrated via rafting on natural floating material or on ships’ hulls. Solving this old puzzle adds new insight into Hawaiian phytogeography.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139423137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First record of a cylindrical Dipterocladia (Ceramiales, Delesseriaceae), D. cylindrica sp. nov., from Korea based on morphological and molecular analyses","authors":"Jeong Chan Kang, Mi Yeon Yang, Yeo Kyeong Oh, Myung Sook Kim","doi":"10.1515/bot-2023-0067","DOIUrl":"https://doi.org/10.1515/bot-2023-0067","url":null,"abstract":"Abstract We describe a new species, Dipterocladia cylindrica, found in the subtidal zone of the eastern and southern coasts of Korea. This species has cylindrical branches with numerous sub-dichotomously branching monosiphonous determinate branchlets without adventitious filaments, heavy cortication throughout the thallus, and alternating clockwise periaxial cell formation. The external features of the new species are closer to those of the genus Dasya than to those of Dipterocladia, which have flattened thalli with pairwise distichously arranged monosiphonous pseudolateral and polysiphonous determinate laterals. However, based on the combined results of plastid rbcL and mitochondrial COI–5P sequences, the molecular phylogenetic relationships clearly indicate that our specimens belong to the genus Dipterocladia. We also detected more meaningful morphological characters for delineating the genus within the subfamily Dasyoideae by comparing the morphology and phylogeny, but we could not find unique characters for each clade. Further studies based on reproductive morphology and molecular phylogeny for delimiting the generic boundaries are needed.","PeriodicalId":9191,"journal":{"name":"Botanica Marina","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139380097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}