Phycological Research最新文献

{"title":"Marine Benthic Dinoflagellates – Their Relevance for Science and Society (2nd Edition). MonaHoppenrath, NicolasChomérat, TakeoHoriguchi, Shauna A.Murray and LesleyRhodes2023. Senckenberg Gesellschaft für Naturforschung, Frankfurt am Main, Germany. Senckenberg‐Buch88, 376 pp., 122 figures (more than 240 colour images, about 250 electron micrographs and more than 330 drawings), 8 tables, in English. ISBN 978‐3‐510‐61424‐0, hardcover, € 34.90.","authors":"Tomohiro Nishimura","doi":"10.1111/pre.12550","DOIUrl":"https://doi.org/10.1111/pre.12550","url":null,"abstract":"","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140802133","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":"Picochloropsis malayensis gen. et sp. nov. (Chlorellales, Chlorophyta), an ammonium tolerant, polyphosphate‐accumulating microalga from seawater","authors":"Tomoyo Katayama, Kazuya Takahashi, Mohd Effendy Abd Wahid, Fatimah Md. Yusoff, Kazutaka Takahashi","doi":"10.1111/pre.12552","DOIUrl":"https://doi.org/10.1111/pre.12552","url":null,"abstract":"SUMMARYThe significant concentrations of phosphate in wastewater can be considered as an important fertilizer source. Some microalgae uptake phosphate from wastewater and store it in the form of polyphosphate (polyP). Therefore, biological phosphorus recovery processes have been attracting significant attention recently. However, wastewaters are often rich in ammonium, and so microalgae used for phosphorus recovery should be tolerant of this component. In the present study, 151 microalgae were isolated from freshwater, brackish water and seawater. Among them, 11 strains showed higher growth rates in ammonium‐rich media. Of these, the strain SLG4‐06 originating from a marine environment showed the highest polyP accumulation rate and was selected as the most potential alga for phosphorus recovery from wastewater. Based on the morphological and ultrastructural characteristics and phylogenetic analyses of nuclear‐encoded 18S rDNA and chloroplast‐encoded <jats:italic>rbcL</jats:italic> of strain SLG4‐06, we propose <jats:italic>Picochloropsis malayensis</jats:italic> gen. et sp. nov. for this strain in the Chlorellales, Trebouxiophyceae. Because <jats:italic>P. malayensis</jats:italic> can grow in both seawater and freshwater environments, it may be suitable for wastewater treatment in marine aquaculture ponds with widely fluctuating salinity levels.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140630715","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":"A description of Aliichlorella ignota gen. et sp. nov. and a comparison of the efficiency of species delimitation methods in the Chlorella‐clade (Trebouxiophyceae, Chlorophyta)","authors":"Elena Krivina, Aleksey Portnov, Anna Temraleeva","doi":"10.1111/pre.12551","DOIUrl":"https://doi.org/10.1111/pre.12551","url":null,"abstract":"The present study reports a new representative of <jats:italic>Chlorella</jats:italic>‐clade that was newly isolated from the Lake Vos'merka (Samara region, Russian Federation). 18S–ITS1–5.8S–ITS2 sequence analyses indicated that the studied strain ACSSI 368 and related <jats:italic>Chlorella chlorelloides</jats:italic>, <jats:italic>Chlorella pulchelloides</jats:italic>, formed an separate cluster in the <jats:italic>Chlorella</jats:italic>‐clade, unrelated to the holotype of the genus <jats:italic>Chlorella</jats:italic> – <jats:italic>Chlorella vulgaris.</jats:italic> The independent place of the genus was also confirmed by genetic distances. The individual species status of the studied strain ACSSI 368, compared with the sister <jats:italic>C. chlorelloides</jats:italic>, was confirmed by morphological differences (cell number per colony, type of chloroplast, number of autospores), genetic distances of the interspecific level by 18S–ITS1–5.8S–ITS2 fragment, alone by internal transcribed spacer 1 (ITS1) and internal transcribed spacer 2 (ITS2) sequences, one complementary base change in ITS1, and the results of species delimitation using five methods. A description of studied strain ACSSI 368 was provided as an authentic strain of the type species <jats:italic>Aliichlorella ignota</jats:italic>. Currently, the new genus <jats:italic>Aliichlorella</jats:italic> also includes <jats:italic>Aliichlorella chlorelloides</jats:italic> comb. nov. and <jats:italic>Aliichlorella pulchelloides</jats:italic> comb. nov. In general, six different delimitation algorithms were used in the present study. The ASAP (i.e. assemble species by automatic partitioning) and LocMin (i.e. ‘local minimum’ function) algorithms showed synchronous results, but their accuracy with respect to closely related species was somewhat lower. The mlPTP algorithm simultaneously aimed to combine closely related species in one and at the same time divide slightly distinguishing strains within a species into several molecular operational taxonomic units. The bPTP algorithm separated excessively <jats:italic>Chlorella</jats:italic>‐clade representatives into individual species. The generalized mixed Yule coalescent (GMYC) algorithm results were consistent the most with the modern understanding of the <jats:italic>Chlorella</jats:italic>‐clade taxonomy. However, the same method is one of the most time‐consuming because, for its implementation, it is necessary to carry out long preparatory work. The KoT results were less accurate than the GMYC results, although this is less time‐consuming because it does not require the preliminary construction of ultrametric trees.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140589353","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":"Laboratory‐scale preparation of prostaglandins using acetone powder of the red alga Gracilaria vermiculophylla","authors":"Muhammad Ikbal Illijas, Nobuya Suzuki, Masaki Honda, Nur Rahmawaty Arma, Andriani Nasir, Luqman Saleh, Dahlia Dahlia, Rahmi Mulyani, Yutaka Itabashi","doi":"10.1111/pre.12548","DOIUrl":"https://doi.org/10.1111/pre.12548","url":null,"abstract":"SummaryThe red alga <jats:italic>Gracilaria vermiculophylla</jats:italic> is a prostaglandin (PG)‐producing macroalga. The alga is rich in polyunsaturated fatty acids with 20 carbon atoms, mainly arachidonic acid (AA), which is a precursor of PGs. The purpose of the present study was to analyze the ability of the red alga to produce PGs using acetone powder as the crude enzyme prepared from the alga. The acetone powder (250 mg) was incubated with different amounts of exogenous AA (0.1–4 mg). For the determination of PG contents, 5 μL of a sample solution (5 mL in water) consisting of acetone powder and AA was injected into the HPLC column. For PG analysis, an HPLC system connected with a mass spectrometer was used. Results of the study showed that the released PGs from incubation of acetone powder and AA consisted of PGE<jats:sub>2</jats:sub>, 15‐keto‐PGE<jats:sub>2</jats:sub>, 15‐hydroperoxy‐PGE<jats:sub>2</jats:sub>, PGA<jats:sub>2</jats:sub>, and PGF<jats:sub>2α</jats:sub>. The capability of the crude enzyme prepared from the red alga to produce PGs was affected by available oxygen and AA concentrations. The crude enzyme (250 mg) was capable of producing 164 and 141 μg of PGE<jats:sub>2</jats:sub> and 15‐keto‐PGE<jats:sub>2</jats:sub>, respectively, from incubation with 250 μg of AA. This in vitro method could be a simple way to provide PGs in the laboratory.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140589338","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":"Lithophyllum nagaokaense sp. nov. (Corallinales, Corallinophycidae, Rhodophyta): A new rhodolith-forming non-geniculate coralline alga from Japan","authors":"Min-Khant-Kyaw, Aki Kato, Akira Kurashima, Lawrence M. Liao, Masasuke Baba","doi":"10.1111/pre.12549","DOIUrl":"https://doi.org/10.1111/pre.12549","url":null,"abstract":"<i>Lithophyllum</i> is a cosmopolitan coralline algal genus with 12 species currently recognized in Japan based on modern morpho-anatomical taxonomic concepts primarily characterized by having uniporate tetrasporangial and bisporangial conceptacles, the presence of secondary pit-connections between cells of adjacent filaments and a dimerous thallus construction with a single basal layer of predominantly non-palisade cells. In the present study, we describe <i>Lithophyllum nagaokaense</i> sp. nov. based on a combination of molecular and morpho-anatomical data of specimens from the temperate waters of Japan. The new species forms both attached epilithic thalli and free-living rhodoliths. Phylogenetic analyses of <i>psb</i>A, <i>rbc</i>L and COI markers resolved <i>L. nagaokaense</i> as an independent species. Morpho-anatomically, <i>L. nagaokaense</i> resembles <i>Lithophyllum johansenii</i>, originally described from Australia, but distinguished from the latter by the absence of enlarged angular cells occluding pore canals of tetrasporangial conceptacle chambers. <i>Lithophyllum nagaokaense</i> shared a fruticose morphology with <i>Lithophyllum kaiseri</i>, <i>Lithophyllum kuroshioense, Lithophyllum neo-okamurae, Lithophyllum okamurae,</i> and <i>Lithophyllum pygmaeum</i> from Japan. Of these, <i>L. nagaokaense</i> is the most similar to <i>L. neo-okamurae</i> in having attached and free-living thalli with encrusting and warty to lumpy growth forms bearing knobby protuberances that are dichotomously branched or anastomosing. The new species is distinct from other Japanese fruticose species collectively by five tetrasporangial conceptacle chamber characters and the absence of trichocytes. A taxonomic key for identifying Japanese fruticose species is provided. This is the fifth <i>Lithophyllum</i> species and the third rhodolith-forming species verified by DNA sequencing to be found in Japan.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140589915","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":"Novelties in nomenclature and typification appearing in Phycological Research 72 (2).","authors":"","doi":"10.1111/pre.12547","DOIUrl":"https://doi.org/10.1111/pre.12547","url":null,"abstract":"<p><b><i>Dudresnaya ryukyuensis</i></b> M. Hoshino, Wakeman, Kitayama &amp; Kogame <b>sp. nov.</b> <i>Phycol. Res</i>. 72 (online): 135. 25 February 2024.</p>\u0000<p><b><i>Himehibirhodia</i></b> M. Hoshino, Kitayama &amp; Kogame <b>gen. nov.</b> <i>Phycol. Res</i>. 72 (online): 145. 25 February 2024.</p>\u0000<p><b><i>Himehibirhodia minima</i></b> (Okamura) M. Hoshino, Kitayama &amp; Kogame <b>comb. nov.</b> <i>Phycol. Res</i>. 72 (online): 145. 25 February 2024.</p>\u0000<p><b><i>Klisinema koreana</i></b> S.W. Kim, N. Lee, Ji-Ho Song &amp; O. Lee <b>sp. nov.</b> <i>Phycol. Res</i>. 72 (online): 70. 17 December 2023.</p>\u0000<p><b><i>Nudresdaya</i></b> M. Hoshino, A.R. Sherwood &amp; Kogame <b>gen. nov.</b> <i>Phycol. Res</i>. 72 (online): 146. 25 February 2024.</p>\u0000<p><b><i>Nudresdaya littleri</i></b> (I.A. Abbott) M. Hoshino, A.R. Sherwood &amp; Kogame <b>comb. nov.</b> <i>Phycol. Res</i>. 72 (online): 146. 25 February 2024.</p>\u0000<p>No new typifications appearing in <i>Phycological Research</i> 72 (2) (“Typification” does not include type citations associated with new taxa).</p>\u0000<p>For details of the author citations and the publication dates, see Editorial Board (2022) <i>Phycol. Res</i>. <b>70:</b> 66.</p>\u0000<p>Editorial Board of <i>Phycological Research</i>.</p>","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140602894","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":"Sterols of the aberrant plastid, Kareniacean dinoflagellate Asterodinium gracile: Chemotaxonomic overlap with amphisterol‐producing Amphidinium carterae","authors":"Jeffrey D. Leblond, Kyra Sabir, Daniel Ayoub, Mackenzie B. McKinnon, Chelsea S. Myers, Tawakalit J. Busari, Braedyn E. Hollingsworth","doi":"10.1111/pre.12546","DOIUrl":"https://doi.org/10.1111/pre.12546","url":null,"abstract":"SUMMARYDinoflagellates have a rich history of characterization of their membrane‐reinforcing sterols because of a structural diversity and chemotaxonomic utility uncommon to other classes of algae. The Kareniaceae are no exception in that they produce sterols, often containing a Δ<jats:sup>8(14)</jats:sup> nuclear unsaturation, which are rare in most other dinoflagellate groups. A continuing goal of our laboratory is to examine the sterols of previously uncharacterized dinoflagellates to assess their sterol‐based chemotaxonomy compared to other members of the Dinophyceae. <jats:italic>Asterodinium gracile</jats:italic>, a member of the Kareniaceae, has not been commercially available for study until recently. To this end, our objective was to characterize the sterols of <jats:italic>A. gracile</jats:italic> to determine whether they match the 4α‐methyl‐substituted, Δ<jats:sup>8(14)</jats:sup>‐nuclear‐unsaturated sterols, such as (24<jats:italic>R</jats:italic>)‐4α‐methyl‐5α‐ergosta‐8(14),22‐dien‐3β‐ol (gymnodinosterol; C<jats:sub>29:2</jats:sub>) and 27‐<jats:italic>nor</jats:italic>‐(24<jats:italic>R</jats:italic>)‐4α‐methyl‐5α‐ergosta‐8(14),22‐dien‐3β‐ol (brevesterol; C<jats:sub>28:2</jats:sub>), of most species within the canonical genera <jats:italic>Karenia</jats:italic>, <jats:italic>Karlodinium</jats:italic> and <jats:italic>Takayama,</jats:italic> or instead the 4‐desmethyl sterols, such as 27‐<jats:italic>nor</jats:italic>‐(24<jats:italic>R</jats:italic>)‐23‐methyl‐ergosta‐8(14),22‐dien‐3β‐ol (C<jats:sub>28:2</jats:sub>), of its chemotaxonomically atypical, yet closest phylogenetic relative, <jats:italic>Karenia papilionacea</jats:italic>. We have observed <jats:italic>A. gracile</jats:italic> to produce two 4α‐methyl‐substituted sterols with the suggested structures of 4α‐methyl‐5α‐ergosta‐8(14)‐en‐3β‐ol (C<jats:sub>29:1</jats:sub>) and 4α‐methyl‐5α‐ergosta‐8(14),24(28)‐dien‐3β‐ol (amphisterol, C<jats:sub>29:2</jats:sub>), as major sterols amongst five other minor sterols, which included the common dinoflagellate sterol cholest‐5‐en‐3β‐ol (cholesterol, C<jats:sub>27:1</jats:sub>), but did not include gymnodinosterol or brevesterol (as in most canonical Kareniaceae) or 27‐<jats:italic>nor</jats:italic>‐(24<jats:italic>R</jats:italic>)‐23‐methyl‐ergosta‐8(14),22‐dien‐3β‐ol (as found in <jats:italic>K. papilionacea</jats:italic>). Detection of amphisterol and 4α‐methyl‐5α‐ergosta‐8(14)‐en‐3β‐ol is notable because they are sterols associated with some species of <jats:italic>Amphidinium</jats:italic>, such as <jats:italic>Amphidinium carterae</jats:italic>, and, to our knowledge, have not been observed in a member of the Kareniaceae before. Discovery of these major sterols in <jats:italic>A. gracile</jats:italic> expands our knowledge of the range of sterols produced by the Kareniaceae and indicates a shared chemotaxonomy with some species of <jats:italic>Amphidinium</jats:italic>.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140155680","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 study of the polyphyletic Dudresnaya (Dumontiaceae, Florideophyceae) with descriptions of Dudresnaya ryukyuensis sp. nov. and two new genera, Himehibirhodia and Nudresdaya","authors":"Masakazu Hoshino, Kevin C. Wakeman, Aki Kato, Taiju Kitayama, Alison R. Sherwood, Shinya Uwai, Kazuhiro Kogame","doi":"10.1111/pre.12545","DOIUrl":"https://doi.org/10.1111/pre.12545","url":null,"abstract":"The red algal genus <i>Dudresnaya</i> (Dumontiaceae, Gigartinales) has traditionally been a morphologically well-defined taxon, but its molecular phylogeny has rarely been studied. To examine the phylogenetic relationships among <i>Dudresnaya</i> species, we generated new partial sequences of mitochondrial <i>cox</i>1, chloroplast <i>rbc</i>L and nuclear 28S rRNA genes from an undescribed <i>Dudresnaya</i> species from Okinawa Island, Japan, alongside five additional described species. Our phylogenetic analyses show that <i>Dudresnaya</i> is genetically diverse and polyphyletic. Based on molecular phylogeny and morphological data, we describe the Okinawan <i>Dudresnaya</i> as a new species, <i>Dudresnaya ryukyuensis</i>, and transferred <i>Dudresnaya minima</i> and <i>Dudresnaya littleri</i>, which were phylogenetically and morphologically distinct from the genuine <i>Dudresnaya</i>, to the new genera <i>Himehibirhodia</i> and <i>Nudresdaya</i>, respectively. Our phylogenetic analyses also showed that the Dumontiaceae is not a monophyletic group including the Gainiaceae and Rhizophyllidaceae (DGR complex). Considering that the DGR complex exhibits female reproductive structures and their post-fertilization development that are similar to each other, the DGR complex appears to be recognized as the Dumontiaceae <i>sensu lato</i>.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140006191","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":"Field survey of the phase and sex ratios of the brown alga Dictyota dichotoma (Dictyotales, Phaeophyceae) using sex-specific molecular markers","authors":"Takahiro Arai, Keiichiro Koiwai, Reiko Nozaki, Hidehiro Kondo, Ikuo Hirono, Hidekazu Suzuki, Mitsunobu Kamiya","doi":"10.1111/pre.12544","DOIUrl":"https://doi.org/10.1111/pre.12544","url":null,"abstract":"Dominance of one phase (i.e. diploid or haploid) has been reported in various isomorphic macroalgae; however, studies of the relative frequencies of the two phases are limited to a few taxa owing to the difficulty in identifying phases of sterile thalli. In <i>Dictyota dichotoma</i>, we have previously documented the dominance of fertile sporophytes. In the present study, the phase and sex ratios of sterile thalli of <i>D. dichotoma</i> were determined using newly developed sex-specific markers. Differentially expressed genes were detected by transcriptome analyses of female and male gametophytic strains and a sporophytic strain aiming to identify candidate sex-specific genes. These candidates were aligned with genome sequences on the sex chromosomes of <i>Ectocarpus siliculosus</i> and were identified as putative sex-specific genes of <i>D. dichotoma</i>. Two primer sets were designed to discriminate phase and sex by the presence or absence of PCR products, and these markers were applied to examine the phase and sex ratios of <i>D. dichotoma</i> in various habitats and seasons. The proportion of sporophytes against 33–50 thalli examined in each of the five habitats at Ebisu Island, Shizuoka Prefecture was 88–100%, and the proportion of fertile sporophytes against total sporophytes (fertility proportion) varied among the habitats (0–54%). The fertile sporophytes were remarkably larger than the sterile sporophytes. At Tateyama, Chiba Prefecture, the dominance of sporophytes occurred in all seasons. The fertility proportion of sporophyte was relatively high from February (62.4%) to May (91.9%) and lower than 23% in other seasons. When artificial substrates were anchored in the middle of the <i>D. dichotoma</i> population, newly recruited thalli were all sporophytes, suggesting infrequent reproduction via tetraspores in nature. Based on these findings, we discuss potential fitness differences between the phases of <i>D. dichotoma</i>.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139495318","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":"Vegetation variety affected by local environments in a coral reef lagoon","authors":"Kandai Tozaki, Gregory N. Nishihara, Azusa Kawate, Teruko Konishi, Yoichi Sato, Michihiro Ito, Hiroyuki Fujimura, Atsuko Tanaka","doi":"10.1111/pre.12540","DOIUrl":"https://doi.org/10.1111/pre.12540","url":null,"abstract":"From shore to sea, coral reefs can generally be divided into a lagoon zone, a reef crest, and a fore reef. Environmental variables, such as nutrient fluxes, light availability, and water temperature, vary among the zones and influence the biodiversity of submerged macrophytes. Additionally, the biodiversity of vegetation within the lagoon appears to be affected by multiple and extremely localized conditions. We investigated the impact of small-scale variations on vegetation diversity, and implemented an ecological survey within a well-defined area inside of a lagoon at Bise Point, Okinawa, Japan. A total of 20 macroalgal species (four green algae, six brown algae, and ten red algae) and four seagrass species were identified from the surveyed quadrats over a period of 19 months, from October 2019 to March 2021. Patterns in species occurrence were spatially and temporally heterogeneous. Notably, water motion and sediment flux were highly variable among the monitoring sites. Redundancy analysis allowed us to evaluate the significance of environmental factors on the vegetation of each monitoring area. Six environmental factors were considered in this study, but their impacts on local vegetation were not equivalent. Redundancy analysis suggested that water depth, flow velocity, and the ratio of the small fraction of deposition particles were the three factors with the strongest influence on local vegetation. This study provides some crucial insights into the determinants of vegetation in a coral reef lagoon. Our findings suggest that the factors we examined exert more influence on the vegetation than seasonal effects.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139414916","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}