Cryptogamie Algologie最新文献

{"title":"The Canopy-Forming Alga Ericaria brachycarpa (J.Agardh) Molinari-Novoa & Guiry (Fucales, Phaeophyceae) Shows Seasonal and Depth Adaptation to the Incoming Light Levels","authors":"N. Sant, E. Ballesteros","doi":"10.5252/cryptogamie-algologie2021v42a6","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2021v42a6","url":null,"abstract":"ABSTRACT The shallow water canopy-forming alga Ericaria brachycarpa (J.Agardh) Molinari-Novoa & Guiry shows higher photosynthetic efficiency (α), maximum photosynthetic rates (Pmax), light at compensation (Ic) and dark respiration (Rd) in individuals collected at the lower depth limit of distribution of the species (20 m) than at shallower depths (2 and 10 m). Photosynthesis at saturation light levels (Psat) does not change in crossed transplants from 3 to 20 and from 20 to 3 m neither after 11 or 90 days. However, production at low light levels (Pb) increased in transplants from 3 to 20 m and decreased in transplants from 20 to 3 m after 90 days. Photosynthesis, both at high and low light levels increased from June to September. Seasonality explained most of the variance (70%) in the values of Psat, whilst transplantation explained 47% of the variance for Pb and Rd. Thus, E. brachycarpa is able to adapt its photosynthetic performances across its depth distribution limits and easily cope with sudden variations in the light environment associated or not with seasonality.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80745464","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":"Updated Distribution of Rare Stonewort Chara kokeilii A.Braun (Charophyta) in Southeast Europe with Environmental Notes","authors":"N. Koletić, A. Rimac, V. Šegota, N. Vuković, J. Blaženčić, A. Alegro","doi":"10.5252/cryptogamie-algologie2021v42a5","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2021v42a5","url":null,"abstract":"ABSTRACT A new site for stonewort Chara kokeilii A.Braun was recorded in a Mediterranean shallow lake Prološko Blato Retention, Croatia, SE Europe. The species was associated with the vegetation alliance Potamogetonion graminei Westhoff & Den Held. This record has been compared with four other sites (Albania, Bulgaria, Greece and Montenegro) from which the species was recorded in SE Europe, regarding the species morphological traits, environmental parameters and vegetation types. It is possible that the main distribution area of this species is in Southeast Europe, a statement that is supported by previous micropaleontological research. This research provides new data on distribution and ecological affiliation of the critically endangered C. kokeilii (IUCN Red List Categories and Criteria).","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89213067","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":"Morphological and Phylogenetic Data Confirm the Identity of Prasiola fluviatilis (Prasiolales, Trebouxiophyceae) from Glacier Streams in the Tianshan Mountains, China","authors":"W. Pang, Xiaodie Jiang, Yue Cao, F. Leliaert, Quanxi Wang","doi":"10.5252/cryptogamie-algologie2021v42a4","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2021v42a4","url":null,"abstract":"ABSTRACT The green alga Prasiola fluviatilis (Sommerfelt) Areschoug ex Lagerstedt occurs in cold lotic environments. The species has a mainly circumarctic distribution, but has also been reported from glacier areas in lower latitude regions in both hemispheres. It was reported from China on a single occasion in the first half of the 20th century, but without description, illustrations or voucher specimens the identity of this record cannot be verified. Here we confirm the presence of P. fluviatilis in the Tianshan Mountains, Xinjiang Province, China based on morphological features, habitat characteristics, and plastid rbcL and tufA gene sequences. The biogeographic distribution of P. fluviatilis and its phylogenetic relationship with other terrestrial and freshwater Prasiola species are discussed.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84952661","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":"Mallomonas vietnamica Gusev, Kezlya & Tran, sp. nov. (Synurales, Chrysophyceae), a New Species, that Shares Some Features with Fossil Taxa","authors":"E. Gusev, E. Kezlya, H. Tran, M. Kulikovskiy","doi":"10.5252/cryptogamie-algologie2021v42a3","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2021v42a3","url":null,"abstract":"ABSTRACT A new species, Mallomonas vietnamica Gusev, Kezlya & Tran, sp. nov., is described from Vietnam based on silica-scale morphology elucidated by transmission and scanning electron microscopies. The species belongs in section Mallomonas Perty and is characterized by large oval scales with a wide and deep dome, which is recessed from the scale perimeter. The domes are shifted to the right side of scales and oriented at different angles to the scale's longitudinal axis. Bristles of the newly described taxon are characterized by a distinctly hooked foot. Scales of M. vietnamica Gusev, Kezlya & Tran, sp. nov. were found at only one locality in Hanoi, at the border of Ba Vi National Park in the freshwater Da River (Sông Đà).","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77505848","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":"Building-Up Knowledge on Green Marine Macroalgae Diversity in the Western Antarctic Peninsula: Data from Two Molecular Markers Reveals Numerous Species with Amphipolar Distribution","authors":"Hélène Dubrasquet, I. Garrido, Paulina Bruning, Janette Reyes, M. Guillemin","doi":"10.5252/cryptogamie-algologie2021v42a2","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2021v42a2","url":null,"abstract":"ABSTRACT Low levels of diversity and endemism, when compared to red or brown algae, have been reported for Antarctic green marine macroalgae (Chlorophyta). However, recent studies including the use of molecular markers have allowed us to revisit the taxonomical status of species thought to be well known, underlying the existence of unexpected Antarctic flora diversity at local and regional scale. In the present study, samples of green macroalgae along the Western Antarctic Peninsula (from the 62°S down to the 66°S) were sequenced for two genetic markers regularly used for species determination and barcoding in Chlorophyta (i.e., the plastid genes tufA and rbcL). From the 122 specimens of Chlorophyta sampled, 85 were sequenced for the gene tufA and 16 for the gene rbcL. Using the NCBI Nucleotide Blast Tool to compare our sequences to the ones available in public data depositories allowed the identification of 11 species. Three new species were reported for the area: Rosenvingiella radicans (Kütz.) Rindi, L.McIvor & Guiry, Urospora wormskioldii (Mertens) Rosenvinge and Ulvella islandica R.Nielsen & K.Gunnarsson. Furthermore, molecular identification revealed strong match (> 95%) between our Antarctic sequences and the ones obtained for samples from the northern hemisphere for Acrosiphonia arcta (Dillwyn) Gain, Prasiola crispa (Lightfoot) Kützing, Prasiola antarctica Kützing 1849, R. radicans, Ulva sp. A-GW, U. islandica, Urospora penicilliformis (Roth) Areschoug and U. wormskioldii confirming the amphipolar distribution of various taxa of Antarctic Trebouxiophyceae and Ulvophyceae. Amphipolar distribution seems more common in green than red or brown Antarctic seaweeds, so here we hypothesize that recurrent occurrence of long dispersal events could explain the low level of endemism observed for this phylum along the Antarctic coasts.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77475351","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":"Molecular Data Reveal the Presence of Three Plocamium Lamouroux Species with Complex Patterns of Distribution in Southern Chile","authors":"A. Montecinos, Oscar R Huanel, M. E. Ramirez, M. Guillemin","doi":"10.5252/cryptogamie-algologie2021v42a1","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2021v42a1","url":null,"abstract":"ABSTRACT Plocamium Lamouroux is a widespread genus for which 45 species are currently recognized. However, classical taxonomy based only on morphological characters, is problematic within this genus. The use of molecular tools has uncovered cryptic genetic species, mistakenly grouped under the name of morphological species that are common and widespread (including the generitype Plocamium cartilagineum (Linnaeus) P.S.Dixon). The aim of this work was to evaluate the species diversity of Plocamium in Southern Chile. For this purpose, three independent molecular markers were sequenced in samples collected from seven populations located between 41°S and 54°S. The species diversity was evaluated using phylogenetic reconstructions and two independent methods for species delimitation (ABGD and GMYC). The outcomes of each method were congruent, suggesting the presence of three species in Southern Chile. One species, named Plocamium sp. 1, is restricted to Punta Guabún, the only locality sampled north of the biogeographic barrier of the 42°S. The other two species, Plocamium sp. 2 and 3 are distributed in sympatry in Patagonia and Tierra del Fuego. The three Chilean species form a clade phylogenetically close to sequences obtained from New Zealand and Australia and a divergence along the coasts of Chile after past transoceanic dispersal is proposed. We propose that divergence in glacial microrefugia could have subsequently happen in the southern part of the coast, this hypothesis being supported by the strong impact of glacial maxima on population dynamics, especially in Plocamium sp. 3.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85267503","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":"Analysis of the Type Material of Synedra deformis W.Sm. and Synedra vaucheriae var. Deformis Grunow (Fragilariaceae, Bacillariophyta)","authors":"Bart Van de Vijver, A. Mertens, L. Ector","doi":"10.5252/cryptogamie-algologie2020v41a13","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2020v41a13","url":null,"abstract":"ABSTRACT Despite being one of the dominant groups in the diatom flora of our rivers and lakes, the correct taxonomic identity of several Fragilaria Lyngb. taxa (formerly in the genus Synedra Ehrenb.) is often blurred by insufficient knowledge of the different morphological types. The present paper illustrates and discusses several former Synedra taxa using both light and scanning electron microscope observations. Based on the morphological analysis, Synedra deformis W.Sm. is transferred to the genus Fragilaria as Fragilaria deformis (W.Sm.) Van de Vijver & Ector, comb. nov. A second Synedra species, S. vaucheriae var. deformis Grunow, is likewise investigated but proved a later synonym of F. pectinalis (O.F.Müll.) Lyngb. The morphological results are compared with the (type) material of several similar Fragilaria species such as Fragilaria joachimii Kahlert, F. vaucheriae (Kütz.) J.B.Petersen, F. pectinalis and F. candidagilae Almeida, C.Delgado, Novais & S.Blanco. Notes on the ecology of the different species are added.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77196798","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":"Silica-Scaled Chrysophytes from the Ukrainian Polissia","authors":"D. Kapustin, E. Gusev, G. G. Lilitskaya, M. Kulikovskiy","doi":"10.5252/cryptogamie-algologie2020v41a12","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2020v41a12","url":null,"abstract":"ABSTRACT We investigated the silica-scaled chrysophyte flora from the Ukrainian Polissia by means of electron microscopy. Overall, 49 taxa were recorded, including three species each of Chrysosphaerella Lauterborn and Paraphysomonas De Saedeleer emend. Scoble & Cavalier-Smith, one unidentified Lepidochromonas Kristiansen taxon, two Spiniferomonas E.Takahashi species, 28 Mallomonas Perty taxa and 12 Synura Ehrenb. taxa. Only six species have previously been reported from this region and 29 of the taxa encountered in this study are reported for the first time from Ukraine. Two taxa, Synura petersenii f. columnata Siver and S. korshikovii Kapustin & Gusev were found for the second time since their original descriptions. We hypothesize that the latter species is an endemic of Polissia, however, to test this idea it would be necessary to sample the water-bodies from the adjacent territories of Belarus and Russia.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77232159","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":"Populations of a New Morphotype of Corrugate Lessonia Bory in the Beagle Channel, Sub-Antarctic Magellanic Ecoregion: A Possible Case of On-Going Speciation","authors":"A. Mansilla, K. Gérard, G. Boo, M. E. Ramirez, J. Ojeda, S. Rosenfeld, S. Murcia, J. Marambio, C. González‐Wevar, M. S. Calderon, S. Boo, S. Faugeron","doi":"10.5252/cryptogamie-algologie2020v41a11","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2020v41a11","url":null,"abstract":"ABSTRACT During a 2007 expedition dedicated to study kelp diversity within the Magellanic region, specimens of Lessonia Bory with corrugate, yellowish blades were found along the Beagle Channel. This type of corrugated Lessonia is uncommon, with exception of two species from New Zealand. Three possible hypotheses for its origin were explored in this study: an introduction of L. adamsiae Hay or L. corrugata Lucas from New Zealand by trans-oceanic dispersal; a hybridization between Chilean Lessonia species and Macrocystis pyrifera C.Agardh, particularly abundant in the region; or the existence of a new, undescribed species. Except for their corrugate blades, the individuals displayed short cylindrical stipes, digitate holdfasts, abundant mucilage cavities in the cortex, and reproductive sori on the proximal part of the blades, all traits typical of the genus Lessonia. Molecular phylogenies based on mitochondrial (atp8-trnS spacer, cox1, cox3) and nuclear (ITS1) markers revealed that this corrugate form of Lessonia is neither the result of hybridization with Macrocystis C.Agardh nor an introduction of Australasian corrugate species, L. corrugata or L. adamsiae, but has a close affinity with L. flavicans Bory. Field prospection in five sites along the Beagle Channel indicated that the species occurs in shallow depth (4-6 m), as dense populations of 100% of corrugated individuals, never intermixed with populations of L. flavicans. The possibility of an incipient speciation process in the region is discussed. RÉSUMÉ Populations d'un nouveau morphotype de corrugate Lessonia Bory dans le canal Beagle, écorégion subantarctique de Magellan: un cas possible de spéciation en cours. Au cours d'une expédition de 2007 consacrée à l'étude de la diversité du kelp dans la région de Magellan, des spécimens de Lessonia Bory aux lames ondulées et jaunâtres ont été trouvés le long du canal Beagle. Ce type de Lessonia ondulé est peu commun, à l'exception de deux espèces de Nouvelle-Zélande. Trois hypothèses possibles concernant son origine ont été explorées dans cette étude: une introduction de L. adamsiae Hay ou L. corrugata Lucas de Nouvelle-Zélande par dispersion transocéanique; une hybridation entre l'espèce chilienne Lessonia et Macrocystis pyrifera C.Agardh, particulièrement abondante dans la région; ou l'existence d'une nouvelle espèce non décrite. À l'exception de leurs lames ondulées, les individus présentaient des stipes cylindriques courts, des crampons digitaux, d'abondantes cavités de mucilage dans le cortex et des sores de reproduction sur la partie proximale des lames, tous des traits typiques du genre Lessonia. Des phylogénies moléculaires basées sur des marqueurs mitochondriaux (atp8-trnS spacer, cox1, cox3) et nucléaires (ITS1) ont révélé que cette forme ondulée de Lessonia n'est ni le résultat d'une hybridation avec Macrocystis C.Agardh ni d'une introduction d'espèces ondulées d'Australasie, L. corrugata ou L. adamsiae, mais qu'elle a une étroite aff","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86809583","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":"Genetic Affinities and Biogeography of Putative Levantine-Endemic Seaweed Treptacantha rayssiae (Ramon) M.Mulas, J.Neiva & Á.Israel, comb. nov. (Phaeophyceae)","authors":"M. Mulas, J. Neiva, S. S. Sadogurska, E. Ballesteros, E. Serrão, G. Rilov, Á. Israel","doi":"10.5252/cryptogamie-algologie2020v41a10","DOIUrl":"https://doi.org/10.5252/cryptogamie-algologie2020v41a10","url":null,"abstract":"ABSTRACT Cystoseira sensu lato (Ochrophyta) forests are important habitat formers in the Mediterranean Sea, but they have mostly been studied in the western basin where many species are under decline. In the eastern basin, where fewer species occur, Cystoseira rayssiae Ramon was described in the year 2000 as an endemic species based on morphological characteristics from herbaria samples collected on the Israeli coast. No further investigations have been conducted on this peculiar species since, but recently it has been recorded in contiguous Lebanon and outside the Mediterranean. Our work was aimed at confirming the taxonomic validity and endemic nature of this species, including its position among the recently split Cystoseira sensu stricto, Carpodesmia Greville and Treptacantha Kützing genera, by sequencing the mitochondrial COI gene and by examining morphological characteristics in samples from three different sites in northern Israel. Notwithstanding considerable morphological plasticity, molecular analyses revealed a single unique COI sequence. Phylogenetic analyses show that Cystoseira rayssiae belongs to the resurrected genus Treptacantha and hence, the new combination Treptacantha rayssiae (Ramon) M.Mulas, J.Neiva & Á.Israel, comb. nov., is proposed. Unique sequences and a restricted range support its Levantine-endemic status. Intriguing extra-Mediterranean reports from the Red Sea and the Persian Gulf are probably misidentifications rather than reflecting a disjunct distribution or recent invasion.","PeriodicalId":51000,"journal":{"name":"Cryptogamie Algologie","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87753943","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}