Diversity and Ecology of Algae and Cyanobacteria

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Microbiology".

Deadline for manuscript submissions: closed (2 February 2024) | Viewed by 3821

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Guest Editor
A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia
Interests: algae; cyanobacteria; diversity; biogeography; taxonomy; ecology; metabarcoding; tropics
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Special Issue Information

Dear Colleagues,

Algae and cyanobacteria are among the most important autotrophic organisms in aquatic ecosystems and are also widely distributed in terrestrial habitats. Recently, with the development of modern molecular approaches, the systematics and phylogeny of algae and cyanobacteria have undergone significant changes. New approaches have revealed the enormous hidden diversity of these organisms. The concept of cosmopolitanism in algae and cyanobacteria has been revised, and many endemic species have been identified. In this regard, there is a need to study the mechanisms of speciation and species differentiation depending on ecological characteristics. Among algae and cyanobacteria, a large number of species valuable for biotechnology have also been found, which also determines the importance of further study of their diversity and ecology. A big problem in the study of algae and cyanobacteria is their clearly insufficient investigations in many areas of the world, such as the tropics, the Arctic and Antarctic, and mountain systems. For this Special Issue, high-quality research and review papers related to studies of diversity, biogeography, phylogeny, and ecology of algae and cyanobacteria from aquatic and terrestrial habitats will be selected. Special attention will be paid to studies of insufficiently studied and hard-to-reach areas, such as the tropics and the Arctic and Antarctic.

Dr. Evgeniy S. Gusev
Guest Editor

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Keywords

  • algae
  • cyanobacteria
  • water and terrestrial habitats, biogeography
  • ecology, diversity
  • taxonomy and systematics
  • phylogenetics
  • metabarcoding

Published Papers (4 papers)

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Research

18 pages, 7338 KiB  
Article
Alien Algae Species Invasions in Humic Rivers within Weakly Human Impact Basin
by Pavel Kulizin, Ekaterina Vodeneeva, Nikita Martynenko, Ekaterina Sharagina and Alexander Okhapkin
Life 2024, 14(1), 61; https://doi.org/10.3390/life14010061 - 29 Dec 2023
Viewed by 1141
Abstract
Increasing anthropogenic influence and climate change are leading to significant transformations in living conditions for indigenous representatives of aquatic communities. The problem of alien species invasions is actively discussed in the example of large rivers and water reservoirs, but medium and small rivers [...] Read more.
Increasing anthropogenic influence and climate change are leading to significant transformations in living conditions for indigenous representatives of aquatic communities. The problem of alien species invasions is actively discussed in the example of large rivers and water reservoirs, but medium and small rivers with weak anthropogenic influence have been insufficiently studied in this aspect. With the help of analysis of literary data and the results of our own long-term observations of phytoplankton using morphological and molecular genetic methods in some left-bank Volga tributaries, we identified six invasive species of different taxonomic groups of algae, with a predominance of diatoms. The relevance of using both traditional and modern approaches to identifying invasive algae species is revealed. Such invasive species as Thalassiosira incerta, T. faurii, Skeletonema subsalsum, Unruhdinium kevei, and Gonyostomum semen were part of planktonic communities; the benthic species Plagiotropis lepidoptera var. proboscidea sometimes reached a significant level of development (up 6 to 44% from total biomass) in plankton. It was demonstrated that some algae species have firmly taken the position of dominants and subdominants in planktonic algae communities. The expansion of alien representatives of microphytobenthos was noted in the Volga River basin for the first time. For Gonyostomum semen, its European origin was revealed, for plankton and benthic diatom—Ponto-Caspian. Our study showed that the processes of invasion and subsequent development of alien species take place in habitats with weak anthropogenic influence, which is likely determined by the hydrological, hydrochemical, and climatic changes in river basins and the high adaptive capabilities of invasive species. Full article
(This article belongs to the Special Issue Diversity and Ecology of Algae and Cyanobacteria)
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20 pages, 12374 KiB  
Article
Diversity of Silica-Scaled Chrysophytes in the Steppe Zone of the Southern Urals with a Description of a New Species from the Genus Mallomonas
by Marina Ignatenko, Evgeniy Gusev and Tatyana Yatsenko-Stepanova
Life 2023, 13(11), 2214; https://doi.org/10.3390/life13112214 - 16 Nov 2023
Viewed by 664
Abstract
This paper is devoted to the study of the flora of silica-scaled chrysophytes in water bodies of the steppe zone of the Southern Urals (Russia). Twenty-four taxa were identified via scanning and transmission electron microscopy, twenty of which are representatives of the genus [...] Read more.
This paper is devoted to the study of the flora of silica-scaled chrysophytes in water bodies of the steppe zone of the Southern Urals (Russia). Twenty-four taxa were identified via scanning and transmission electron microscopy, twenty of which are representatives of the genus Mallomonas Perty, while four are species of the genus Synura Ehrenberg. In the course of the study, a species new to science from the genus Mallomonas, M. baturinae sp. nov., was described. This species belongs to the section Papillosae. The stomatocyst of M. doignonii was described. For the first time in Russia and for the third time since description, M. phasma and M. solea-ferrea var. irregularis were reported in the studied area. Here, their extended description is provided with illustrations of their scales in detail. Some rare taxa for the flora of Russia have been identified: M. doignonii, M. pillula f. exannulata, and M. pillula f. valdiviana. One taxon of the genus Mallomonas has not been identified to a species level and is probably a taxon new to science. Full article
(This article belongs to the Special Issue Diversity and Ecology of Algae and Cyanobacteria)
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17 pages, 4626 KiB  
Article
Changes in Diversity of Silica-Scaled Chrysophytes during Lake–River–Reservoir Transition (Baikal–Angara–Irkutsk Reservoir)
by Anna Bessudova, Yuri Galachyants, Alena Firsova, Diana Hilkhanova, Maria Nalimova, Artyom Marchenkov, Ivan Mikhailov, Maria Sakirko and Yelena Likhoshway
Life 2023, 13(10), 2052; https://doi.org/10.3390/life13102052 - 13 Oct 2023
Cited by 2 | Viewed by 616
Abstract
Hydroelectric dams create new ecosystems such as reservoirs. Several hydroelectric dams forming shallow reservoirs were built on the Angara River flowing out of Lake Baikal. The first of them in downstream Angara is Irkutsk Reservoir, with several shallow bays. Since silica-scaled chrysophytes are [...] Read more.
Hydroelectric dams create new ecosystems such as reservoirs. Several hydroelectric dams forming shallow reservoirs were built on the Angara River flowing out of Lake Baikal. The first of them in downstream Angara is Irkutsk Reservoir, with several shallow bays. Since silica-scaled chrysophytes are effective bioindicators for aquatic ecosystems, this paper aimed to determine their distribution, taxonomic structure and species richness in South Baikal and Irkutsk Reservoir, which have different environmental parameters. Thirty-one species were found using scanning and transmission electron microscopy. Only seven of them inhabited South Baikal in June 2023 at 3.66–4.51 °C and pH 7.80–8.24, with Chrysosphaerella baicalensis, Spiniferomonas trioralis f. cuspidata and Mallomonas alpina being prevalent. Only one species (M. alpina) was dominant in Irkutsk Reservoir at all stations at a water temperature of 5.33–11.55 °C and pH 8.10–8.52, alongside three other abundant species, Synura cf. glabra, Mallomonas acaroides and M. crassisquama. The maximum number of species (23) was found in a shallow bay of the reservoir at maximal values of temperature (11.5 °C) and pH (8.57) and minimal values of phosphate and nitrate concentrations during the study. The enrichment of Irkutsk Reservoir in species of silica-scaled chrysophytes was due both to cosmopolitan widespread and polyzonal species as well as to rare boreal, arctic–boreal, and unknown, possibly new species. Full article
(This article belongs to the Special Issue Diversity and Ecology of Algae and Cyanobacteria)
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13 pages, 16743 KiB  
Article
Luticola tenera sp. nov. (Diadesmidaceae, Naviculales)—A New Diatom from the Soil of the State Nature Reserve “Bastak” (Jewish Autonomous Region, Russia)
by Veronika B. Bagmet, Shamil R. Abdullin, Arthur Yu. Nikulin, Vyacheslav Yu. Nikulin and Andrey A. Gontcharov
Life 2023, 13(9), 1937; https://doi.org/10.3390/life13091937 - 20 Sep 2023
Cited by 3 | Viewed by 947
Abstract
Diatoms inhabit different aquatic and non-aquatic environments, including soils. The naviculoid genus Luticola is widespread in various habitats and accounts for 264 species that are only based on morphological and morphometric characteristics. These parameters can greatly vary during the life cycle, making the [...] Read more.
Diatoms inhabit different aquatic and non-aquatic environments, including soils. The naviculoid genus Luticola is widespread in various habitats and accounts for 264 species that are only based on morphological and morphometric characteristics. These parameters can greatly vary during the life cycle, making the species very similar to each other and complicating their unambiguous identification. During a study on soil algal diversity in the Russian Far East (Jewish Autonomous Region), we isolated a strain of naviculoid diatom and examined it using an integrative approach (phylogenetic, morphological, ultrastructural data, and life cycle). Phylogenetic analyses, based on chloroplast rbcL gene data, showed affinity of the new strain with the genus Luticola. Our alga shares morphological features typical of the genus members but differs from them by having valves with a larger width and hook-shaped external proximal raphe ends deflected to the side opposite the stigma. It was revealed that the strain reproduces via two types of sexual reproduction—isogamy and cis-anisogamy. Based on these phenotypic traits, we described the new isolate as Luticola tenera sp. nov. Full article
(This article belongs to the Special Issue Diversity and Ecology of Algae and Cyanobacteria)
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