International Journal on Algae最新文献

{"title":"A Polyphasic Approach Leading to the Discovery of New Taxa of Terrestrial Cyanobacteria for the Flora of Ukraine","authors":"T. Mikhailyuk, O. Vinogradova, A. Gromakova, K. Glaser, U. Karsten","doi":"10.1615/interjalgae.v25.i4.10","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i4.10","url":null,"abstract":"Interesting morphotypes of filamentous cyanobacteria were found in the terrestrial habitats of the Kharkiv region (biological soil crusts) and in the vicinity of Kyiv (old concrete wall in the forest). Morphological and molecular characterization of four original strains revealed that they belong to the recently described genera Wilmottia Strunecky, Elster et Komarek, Pycnacronema M.D. Martins et Branco, Myxacorys Pietrasiak et J.R. Johansen and Tildeniella Mai, J.R. Johansen et Pietrasiak. All are new to the flora of Ukraine. Analysis of p-distances, the nucleotide sequence of the 16S-23S ITS region and the secondary structures of its most informative helices, were used in our phylogenetic analyses sequenicing of the 16S rRNA gene. All Ukrainian strains joined the clades of the corresponding genera with a high degree of support in the Bayesian and Maximum Likelihood analyses. However, their species-level identification gave ambiguous results. Reliable result was obtained only for the strain of genus Wilmottia. It was identified as Wilmottia murrayi (W. et G.S.West) Strunecky, Elster et Komarek. This is the first morphologically and molecularly confirmed record of this species in Europe. Two strains were identified as Pycnacronema cf. caatingensis and Tildeniella cf. torsiva due to their deviations from these species both in morphology and the 16S-23S ITS secondary structures. In the 16S rRNA gene-based phylogenetic analysis, the original strain of the genus Myxacorys took separate position among the known species of this genus and also had a number of morphological differences from them. Therefore, it might represent a new species, but this cannot be proven due to the lack of a 16S-23S ITS sequence of the original strain. Detailed description of the studied strains morphology with tabular review of corresponding species are given here.\u0000","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42818373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taxonomic Revision and List of Cyanobacteria from the Greater Antilles (Cuba, Haiti, Hispaniola, Jamaica, and Puerto Rico). Pt 1","authors":"Th. E. Smith","doi":"10.1615/interjalgae.v25.i4.20","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i4.20","url":null,"abstract":"The purpose of this study is to document the cyanobacteria from Greater Antilles and to revise and update nomenclature to reflect current taxonomic understanding for previously documents species from <i>Nostocale</i> and <i>Chroococcales</i>. There are a total of species 328 species and infraspecies were identified. Puerto Rico had the most at 209 species identified from the Greater Antilles, while Cuba had 106 species, Jamaica had 54, Haiti had 5, Hispanolia had 3 and 19 species were identied from the Caribbean Sea. No species have been identified from the Dominican Republic and Cayman Islands. The dominant order was Nostocales with 205 species (55 <i>Aphanizomenonaceae</i>, 46 <i>Scytonemataceae</i>, 37 <i>Rivulariaceae</i>, 21 <i>Stigonemataceae</i>, 15 <i>Nostocaceae</i>, 15 ,<i>Tolypothrichaceae</i>, 8 <i>Hapalosiphonaceae</i>, 5 <i>Leptobasaceae</i> and 3 <i>Nodulariaceae</i>). <i>Chroococcales </i>was the second most abundant order with 123 species (77 <i>Microcystaceae</i>, 30 <i>Chroococcaceae</i>, 9 <i>Pleurocapsaceae, Gomphosphaeriaceae</i> and <i>Cyanothrichaceae</i> both with 3 and <i>Entophysalidaceae</i> only had one species).","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macrophytobenthos of the Reserved and Transformed Coastal Marine Areas at the South Coast of Crimea in Conditions of the New Biological Invasion (the Black Sea)","authors":"S. Y. Sadogurskiy, T. V. Belich, S. A. Sadogurskaya","doi":"10.1615/interjalgae.v25.i4.50","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i4.50","url":null,"abstract":"Based on the materials of a 2019-2020 study, a comparative hydrobotanical characterisation of two nearby coastal water areas of the Black Sea (Southern Coast of Crimea - SCC) is presented. Both water areas are similar in terms of their complex of natural and climatic conditions; but contrast in terms of the anthropogenic transformation level and eutrophication. In total, 81 species of macrophytes were identified in the study area. In the natural water area, located within the boundaries of the \"Cape Martyan\" Nature Reserve, 61 species were registered (Chlorophyta - 14 (22.6%), Ochrophyta - 12 (19.7%), Rhodophyta - 34 (55.8%), Tracheophyta - 1 (1.6%). To the east of it, the marine water area adjasent to the Gurzuf village is located. This has been transformed and is subject to local, but constant and intense eutrophication from a shallow emergency sewer. In total 63 species were registered here (Chlorophyta - 15 (23.8%), Ochrophyta - 16 (25.4%), Rhodophyta - 32 (50.8%). The ratio of macrophytes ecological and floristic groups by number of species (NS) does not reveal fundamental differences between the two water areas; the tendency of change in the total biomass (BM) of communities with increasing depth along the profiles is similar, and the values at the same depths are comparable (up to 0.8 kg · m-2 in the pseudolittoral zone and up to 6.2-7.0 kg · m-2 in the sublittoral). Significant differences are found in the BM ratio of macrophytes ecological and floristic groups, which ultimately determines the structural features of the vegetation cover of each water area (although their general nature, due to the type of substrate, is similar). Near the Cape Martyan, both in terms of NS and BM, stenobiont (oligosaprobic marine) Phaeophyceae species dominate: in the pseudolittoral - seasonal summer ones; in the sublittoral - perennial ones (belt of Cystoseira s.l.), which is typical for the SCC in summer. In the water area off the Gurzuf village, the algal communities of the pseudolittoral and the shallowest sublittoral zones are formed by eurybiont (polysaprobic brakish-water) Chlorophyta. Such features of the composition and structure are an adaptive response of phytocenoses to intense eutrophication. With a decrease in the trophic content of waters, they could quickly return to a relative norm. However, the situation is complicated by the progressive invasion of the new transformer species Bonnemaisonia hamifera Hariot, which suppresses and displaces native species near the SCC. This changes the appearance, structure, and production indicators of the vegetation cover of the sublittoral zone, and in Gurzuf even leads to local degradation (at depths of ≥ 5 m) of the most productive and species-rich Cystoseira s.l. communities, which are of key importance for maintaining the ecological balance in the coastal marine waters of the region. Presumably, eutrophication is one of the factors that stimulate the spread of B. hamifera, which in the conditions of th","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67362202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diversity and Ecological Characteristics of Algae in the Water Column in the Subbasin of the Large Danube Lakes During the Autumn-Winter Period (Ukraine)","authors":"V. I. Shcherbak, N. Semeniuk, D. Lutsenko","doi":"10.1615/interjalgae.v25.i1.50","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i1.50","url":null,"abstract":"The paper deals with structural and functional components of algal diversity and ecological characteristics in the water column of the large Danubian lakes, Kahul, Kartal, Yalpuh, Kuhurluy, Katlabukh, and Kytay, in the late autumn-winter of 2019-2020. The water column algal taxonomic diversity comprised of 188 species, represented by 191 infraspecies taxa from 7 divisions, 14 classes, 30 orders, 61 families, and 108 genera. According to the algal species diversity, the lakes can be put in the following order: the Yalpuh (78) > Kytay (76) > Kahul (75) > Kuhurluy (55) > Katlabukh (23) > Kartal (16 ist) Bacillariophyta, Chlorophyta and Cyanobacteria prevailed. According to habitat preference, planktonic forms made up 45%, benthic forms 24%, epiphytic forms 5%, littoral forms 15%, and eurytopic forms 11%. According to salinity preference indifferent species dominated, and according to pH preference alkaliphilic species prevailed. The Sorensen similarity index and Kendall rank correlation indices for leading families were rather low -0.18-0.43 and 0.45-0.57, respectively, which is indicative of significant differences among the algal communities in the lakes under study. The algal cell count amounted to 2,853-360,325 thousand cells · dm-3, the biomass - 0.876-64.113 g · dm-3. According to the quantitative characteristics of planktonic algal communities and Cyanobacteria biomass, the Danubian lakes are eutrophic.","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Growth of Filamentous Algae on the Thallus Surface of Kappaphycus alvarezii (Doty) L.M.Liao (Rhodophyta)","authors":"N. Birana, M. Kasim, Salwiyah, A. M. Balubi, Z. R. Yala, W. S. Cahyani, W. Jalil, T. Mustari, M. Paena","doi":"10.1615/interjalgae.v25.i3.70","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i3.70","url":null,"abstract":"Filamentous algae usually form dense or sparse masses that float freely or attach to other plants, rocks, or other hard substrates. Many filamentous algae attach to Kappaphycus alvarezii which is cultivated by farmers in the tropics. This study explained the effect of filamentous algae attachment on the morphology and growth of K. alvarezii. This research was conducted in one of the cultivation locations on the coast of Tanjung Tiram, southeast Sulawesi Province, Indonesia. This study used a vertical net to cultivate K. alvarezii thallus samples. Vertical nets are used to protect K. alvarezii from fish pests and attached algae. We analyze the attachment rate of filamentous algae about the morphology and growth of K. alvarezii thallus within 40 days. The results showed two dominant filamentous algae species, Elachista flaccida and Chaetomorpha crassa. The density of E. flaccida occurred on day 10, with a density level reaching 12 individuals/m2 and increasing on day 20 to 45 individuals/m2. Chaetomorpha crassa species also appeared at 2.24 g/m2 on day 20, decreased to 0.63 g/m2 on day 30, and disappeared on day 40. The torn surface thallus was seen to occur on day 2.324 mm2 on day ten and decreased by 104 mm2 on day 20. Attachment of filamentous algae slightly impacted the growth of K. alvarezii thallus, although the correlation analysis did not show a significant effect. Another correlation analysis explained no significant correlation between multiple attachments of filamentous algae and torn surface thallus of K. alvarezii.","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diversity and Distribution of Freshwater Algae Along an Altitudinal Gradient in Toebrongchhu Stream, Punakha Dzongkhag, Bhutan and Their Relationship with Water Parameters","authors":"Sheto Kumar Ghalley, D. B. Gurung, S. Rai, K. Wangchuk, N. Ghimire","doi":"10.1615/interjalgae.v25.i1.20","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i1.20","url":null,"abstract":"Alga is a diverse and widely distributed microorganism across the globe. An endeavor has been made to study the algae of Toebrongchhu stream, Punakha district, Bhutan including their diversity and distribution pattern. It also assessed the relationship between algae and selected physicochemical parameters of stream water. Stratified systematic sampling was used for the study due to huge differences in altitude and climatic conditions in the study area. The stream was divided into three zones, downstream, mid-stream, and headwater stream along the altitudinal gradient. The algae were collected by scooping, scraping, and scrubbing different moist and submerged substrates from 36 plots along the stream and then preserved in 4% formaldehyde solution. Results present a total of 40 algae taxa including 25 algae identified up to species level, among which 19 are being reported for the first time from Bhutan. Species diversity was higher in downstream altitudinal zone ranging from 1200-1600 m a.s.l. Similarly, the microhabitat pool had higher species diversity. Spearman correlation showed a significant positive correlation of diversity with total dissolved solids, conductivity, salinity, temperature, dissolved oxygen, and pH, and a negative correlation with altitude. Canonical correspondence analysis between algal species and parameters revealed that altitude is the main factor in the distribution of freshwater algae.","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taxonomic Revision and List of Cyanobacteria from the Lucayan Archipelago (Bahamas and Turks and Caicos Islands)","authors":"T. Smith","doi":"10.1615/interjalgae.v25.i3.20","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i3.20","url":null,"abstract":"The purpose of this study is to document the cyanobacteria from Lucayan Archipelago, and to revise and update nomenclature to reflect current taxonomic understanding for previously documents species. There were 88 species identified in the Bahamas islands and 6 species from the Turks and Caicos Islands. There are a total of 89 species and intraspecific taxa from this archipelago. The dominant order was <i>Nostocales</i> with 23 species (16 <i>Rivulariaceae</i>, 6 <i>Scytonemataceae</i>, and only 1 <i>Aphanizomenonaceae</i>). <i>Oscillatoriales</i> (45 <i>Microcoleaceae</i> and 5 <i>Oscillatoriaceae</i>) was the second most abundant order with 22 species. <i>Chroococcales</i> was the third most abundant order with 20 species (8 <i>Microcystaceae</i>, 6 <i>Pleurocapsaceae</i>, 4 <i>Chroococcaceae</i>, and <i>Gomphosphaeriaceae</i> and <i>Cyanothrichaceae</i> only had one species each). <i>Leptolyngbyales</i> was the fourth most abundant order with 13 species (8 <i>Trichocoleusaceae</i> and 5 <i>Leptolyngbyceae</i>). <i>Coleofasciculales</i> had 4 species (4 <i>Coleofasciculaceae</i>), 2 <i>Chroococcidiopsidales</i>, 2 <i>Spirulinales</i> and three orders (<i>Desertifilales, Pleurocapsales</i>, and <i>Pseudanabaenales</i>) only had one species each.","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photosynthesis Versatility in Under One-Hour of Salinity Treatment in the Cyanobacterium Fischerella ambigua str. FS18","authors":"R. Tahri, S. Shokravi, M. Ebadi, M. Mahmoudjanlo","doi":"10.1615/interjalgae.v25.i4.70","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i4.70","url":null,"abstract":"The effect of salinity (80 and 160 mM) was studied on the photosynthetic apparatus of the native cyanobacterium Fischerella ambigua str. FS 18 over a limited time scale (20, 40, and 60 min). 160 mM salinity for 40 and 60 min had stimulating effects on the photosystem II and phycobilisomes. 80 mM treatment for 20 and 40 min had an excitatory impact on the photosystem and phycobilisome yet were destructive by 60 min for both. The stimulatory and harmful effects of salinity and time are more than that of the sample under conditions without increasing salinity). The photosystem ratios play a key role in damages. 80 mM salinity for 20 min increases the photosystem ratio (PSII : PSI) from 1.24 to 3.28. Similarly, a salinity shock of 160 mM for 20 min reduces the photosystem ratio from 1.24 to 0.34. Photosystem ratios can be determined as pinpointsin the effects of short-time salinity treatments.","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Index, Volume 25, 2023","authors":"","doi":"10.1615/interjalgae.v25.i4.80","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i4.80","url":null,"abstract":"","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67361803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Freshwater Algal Biodiversity in Peechi Dam of Thrissur District, Kerala, India","authors":"C.S. Devikrishna, P. P. Tessy, Nasser K.M. Mohamed","doi":"10.1615/interjalgae.v25.i4.30","DOIUrl":"https://doi.org/10.1615/interjalgae.v25.i4.30","url":null,"abstract":"Microalgae have a key role in maintaining life on Earth. They comprise both the base of the food chain and act as major oxygen producers. Microalgae are also beneficial to aquatic ecosystems and make an excellent indicator of water pollution. The present study is an attempt to explore and take taxanomic account of the algal diversity found at the Peechi Dam, which lies across Manali River, a tributary of the Karuvannur River, Thrissur District, Kerala, that lies at 76°22'E longitude and 10°31'N latitude. Karuvannur River is one of the major freshwater sources of the Thrissur district, which flows through the famous Kole lands of Thrissur. The study was carried out over a period of one year, from June 2017 to May 2018. During the period of study, 48 species of phytoplankton were identified which come under 31 genera belonging to ten taxonomic classes. Out of these 10 species each belong to Chlorophyceae and Zygnematophyceae followed by Bacillariophyceae (9 species), Euglenophyceae (8), Cyanophyceae (5), Xanthophyceae (2), Trebouxiophyceae (1), Coscinodiscophyceae (1), Mediophyceae (1) and Dinophyceae (1). Two of the species Xanthidium octocorne Ehr. ex Ralfs and Tetraplektron torsum (Turner) Dedusenko-Scegoleva are new to Kerala.","PeriodicalId":39315,"journal":{"name":"International Journal on Algae","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67362112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}