Epiphytic diatom communities from two mountain bogs in South Korea

Kim, Yeoun; Choi, Jae Suk; Kim, Han Sin; Soon,

doi:10.1127/0029-5035/2007/0084-0363

Cited by 9 publications

(3 citation statements)

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“…In sediment analysis by [ 97 ], it was reported that EMET and EMON species occurred together under oligotrophic conditions. The EFLX is also considered a rare species, but may present better development in swampy habitats, during summer, with pH-values ranging from 4,5 to 6,5 (acidophilus), being this its better characteristic [ 94 , 98 ].…”

Section: Discussionmentioning

confidence: 99%

Structure and species composition of diatom community during the wet season in three floodplain lakes of Brazilian Pantanal

et al. 2021

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In order to access environmental conditions, the use of bioindicators that have a close relationship with environmental stressors is a largely common practice, but when evaluating environmental inferences, the individual dominant taxa need to be interpreted. Humid regions such as the marshlands are fragile ecosystems and sustain communities of microalgae, often used as bioindicators, of which diatoms are a good example. Although they provide an excellent response to chemical and physical changes in water, diatom studies in surface sediments in wetlands are scarce worldwide. To determine whether diatom species have the potential to provide unambiguous inferences in the influence of environmental factors, we have evaluated diatom abundance in surface sediment, from three Pantanal lakes, against a set of environmental gradients: pH, dissolved oxygen, turbidity, conductivity, total dissolved solids, water temperature, index of trophic water status, total phosphorus and total nitrogen. The Ferradura lake presented an oligotrophic state and both Burro and Caracará lakes presented mesotrophic state. Diatoms were more abundant in the a mesotrophic conditions, but with higher species richness in the oligotrophic conditions. Depending on the N:P ratio, the nutrients nitrogen and phosphorus can also play the role of pollutants and may have negative and unpredictable effects in the environment, such as biotic homogenization. Despite the spatial variation in species, there was a greater richness of Eunotia Ehrenberg species, with the highest relative density of Eunotia formica Ehrenberg and E. pantropica Glushchenko, Kulikovskiy & Kociolek, due to the environmental acidic conditions, a determining characteristic of this genus. It was also observed that a small increase in the level of phosphorus generated an increase in the abundance of Aulacoseira Thwaites with the highest relative density of A. pusilla (Meister) Tuji & Houki and A. veraluciae Tremarin, Torgan & T.Ludwig. However, A. italica dominated in the moderately acidic environment. The results can help with decisions in impacted areas to solve socioeconomic problems, environmental management and biodiversity.

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Section: Discussionmentioning

confidence: 99%

Structure and species composition of diatom community during the wet season in three floodplain lakes of Brazilian Pantanal

et al. 2021

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“…Eunotia bilunaris extends from circumneutral to slightly acidophilous sites such as swamps and bogs. It is commonly observed in freshwater with low mineral content [75]. Diatoms like Eunotia rhomboidea, Eunotia c.f.…”

Section: Diatom Community Composition Diversity and Distributionmentioning

confidence: 99%

Response of Diatoms to the Changing Water Quality in the Myristica Swamps of the Western Ghats, India

Thacker

Karthick

2022

Diversity

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Myristica swamps are one of the rarest wetland ecosystems within the sub-tropical evergreen forests of the Western Ghats, India. As their name indicates, they harbor trees belonging to the ancient family Myristicaceae. Due to the waterlogged conditions and high humic decomposition, these swamps are acidic, harbor rare and endemic biotas, and provide ecosystem services to humans. Monitoring this rare ecosystem is crucial because the swamps that once formed a large hydrological network across the Western Ghats are now confined to isolated patches due to human disturbance such as agricultural interventions, roads, and dam construction. Due to the change in land use, there is also a drastic change in water chemistry and associated biodiversity. Biomonitoring is more precise than physical and chemical monitoring. So, the current study aimed to undertake a comprehensive analysis of the physical, chemical, and biological assessment of these swamps. The diatom assemblages are strongly affected by water chemistry and serve as a powerful indicator of environmental changes in the freshwater aquatic systems. However, there is no information on diatom assemblages in these swamps, and the present study aimed to determine the diatom assemblage structure in the Myristica swamps and their response to changing water quality. Diatom samples were taken at 17 different swamps across the central Western Ghats, and a set of environmental parameters was evaluated. Analysis revealed a total of 91 species of diatoms belonging to 27 genera across the 17 sites, from which 44 diatom species showed restricted distribution to this unique environment. Overall, the dominant diatom genera inside the swamps included, Navicula (19.8%), Gomphonema (16%), Eunotia (13.3%), Ulnaria (9.4%), Achnanthidium (8%), Frustulia (6.2%), Planothidium (5.2%), and Brachysira (2.8%). High diatom species richness was observed in the swamps having less anthropogenic disturbance, and diatom assemblage composition was primarily determined by dissolved oxygen, pH, and conductivity. The significant number of geographically restricted taxa in this study points towards our limited understanding of this tropical biome and calls for a dire need for more studies from here, not only to improve our knowledge concerning the diversity, ecology, and biogeography of these diatoms but to further encourage their use in applied (paleo) environmental sciences. Our results indicate that diatoms can prove useful environmental indicators even in harsh environments like swamps and can be a potential tool for assessing ecological and climatic change.

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“…Many investigations of freshwater algae in different regions of Korea have examined reservoirs, dam lakes, swamps, lagoons, streams, and rivers (Chung et al 1968;Chung 1975Chung , 1976Chung , 1979Chung et al 1972aChung et al , 1972bChung and Lee 1986;Kim 1987a, 1987b;Chung 1993a, 1993b;Kim 1996Kim , 1997Kim et al 1995;Kim et al 2007;Kim et al 2009;Kim 2013aKim , b, c, 2014a. There are currently about 3888 known taxa of freshwater algae in Korea, and these taxa are in Cyanophyta (343 taxa), Chlorophyta (1542 taxa), Ochrophyta (167 taxa), Cryptophyta (12 taxa), Euglenophyta (329 taxa), and Bacillariophyceae (1495 taxa) (Kim 2015, Lee and Joh 2015.…”

Section: Introductionmentioning

confidence: 99%

Diversity of phytoplankton species in Cheonjin Lake, northeastern South Korea

Kim

2018

j ecology environ

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Background: Several investigations carried out from large brackish lagoons in South Korea. However, no studies have yet examined phytoplankton in lagoons that changed to freshwater, such as Cheonjin Lake. The present study examined the algae from Cheonjin Lake. Methods: Samples were collected at monthly inetrvals from May 2017 to April 2018, from the surface layer using a plankton net (mesh size 20 μm), and sequeezing submerged macrophytes. Microscopic examinations were conducted at a magnification of 200 to 1000x using a Zeiss microscope (Axio Imager. A2), and photographs were taken with an AxioCam HRC camera. Silica-scaled samples of Chrysophyta for SEM were placed on coverglass, air dried, coated with gold, and then examined with a Hitachi SV8220 SEM. Results: A total of 376 taxa from six major algal groups (Chlorophyta, Chrysophyta, Euglenophyta, Cyanophyta, Dinophyta, and Cryptophyta) were identified. Among these algae, 28 taxa of desmids, 9 taxa of Euglenophyceae, 4 taxa of Chlorophyceae, 2 taxa of Chrysophyceae, and 1 taxon of Xanthophyceae are reported for the first time in Korea. A new species, Cosmarium hexagonum sp. nov was described. The phytoplankton communities were characterized by an abundance of Desmids (within Charophyceae) accounted for 148 taxa from 22 genera. Species richness were particularly high in the Autumn. Conclusion: In this study, a total 376 taxa of 148 desmids (Charophyceae), Chlorophyceae (103 taxa), Chrysophyceae (53 taxa), Euglenophyta (49 taxa), Dinophyta (8 taxa), and Cryptophyta (2 taxa) were identified from Cheonjin Lake. Twenty-eight taxa of desmids including a new species (Cosmarium hexagonum sp. nov.), 9 taxa of Euglenophyceae, 4 taxa of Chlorophyceae, 2 taxa of Chrysophyceae, and 1 taxon of Xanthophyceae were newly recorded in Korea.

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Epiphytic diatom communities from two mountain bogs in South Korea

Cited by 9 publications

References 0 publications

Structure and species composition of diatom community during the wet season in three floodplain lakes of Brazilian Pantanal

Structure and species composition of diatom community during the wet season in three floodplain lakes of Brazilian Pantanal

Response of Diatoms to the Changing Water Quality in the Myristica Swamps of the Western Ghats, India

Diversity of phytoplankton species in Cheonjin Lake, northeastern South Korea

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