The planktonic diatom diversity of ancient Lake Hovsgol, Mongolia

Edlund, Mark B.; Willlams, Rebecca M.; Nergui, Soninkhishig

doi:10.2216/i0031-8884-42-3-232.1

Cited by 38 publications

(18 citation statements)

References 41 publications

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“…For size reference, Lake Hovsgol is similar to Lake Erie in volume (545 km 3 ). Lake Hovsgol is dimictic, with ice cover from November to June, an established thermocline by late July (10-14 m depth), and summer surface water temperatures reaching 14-15°C (Edlund et al 2003;Urabe et al 2006). It is an ultra-oligotrophic lake; characterized by low primary production (2-5 mg C·m −3 ·day −1 ), high oxygen content year-round throughout the water column (8-11.5 mg O 2 ·l −1 ), and clear water (Secchi disk readings commonly up to 20 m) (Kozhova et al 1994;Urabe et al 2006).…”

Section: Study Sitementioning

confidence: 99%

Abundance, spatial distribution, and diet of endangered Hovsgol grayling (Thymallus nigrescens)

et al. 2011

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The Hovsgol grayling, endemic to Lake Hovsgol, Mongolia, is considered endangered, but published descriptions of the species abundance, distribution, or behavior do not exist. We used hydroacoustics, vertical and horizontal gillnetting, zooplankton sampling, and stomach content analysis to characterize abundance, distribution, prey availability, and diet of Hovsgol grayling. Pelagic Hovsgol grayling densities averaged 34.2±6.8 individuals·ha −1 (biomass of 4.4±0.9 kg·ha −1 ) and were concentrated along the western and northern areas of the lake. Gillnet catch rates were 7.5 times higher for littoral sets than pelagic sets. Pelagic vertical distributions of zooplankton and Hovsgol grayling were concentrated above 50 m, with grayling exhibiting diel vertical migrations from 15 m at night to 30 m during the day. Smaller Hovsgol grayling fed primarily on zooplankton while larger individuals fed more heavily on benthic prey in littoral and pelagic areas. The results from this study may be used to guide conservation management and monitoring strategies for Hovsgol grayling, and provide a conservation reference point as human population growth and environmental change continues in the Lake Hovsgol catchment.

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Section: Study Sitementioning

confidence: 99%

Abundance, spatial distribution, and diet of endangered Hovsgol grayling (Thymallus nigrescens)

et al. 2011

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“…Dulma (1979) was described conducting extensive investigations of some limnological features of those lakes. A wealth of limnological information on the physical, chemical and biological nature of such lakes is available in Mongolia's deepest lake, Hovsgol (Kozhova and Zagorenko 1979;Hindak and Zagorenko 1992;Kozhova et al 1994Kozhova et al , 2000Goulden et al 2000;Edlund et al 2003). Goulden et al (2006) have vigorously edited the most recent limnological results from Lake Hovsgol as reported by several scientists.…”

Section: Introductionmentioning

confidence: 99%

Comparative investigation of chemical and biological characteristics in waters and trophic state of Mongolian lakes

2009

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The objective of this study is to describe the biogeochemical characteristics in the waters of Mongolian lakes, particularly those related to parameters limiting phytoplankton growth and the trophic state. Investigations into the distribution of chemical and biological parameters were carried out in the following 18 lakes: Har Us, Har, Hovsgol, Achit, Dalai, Bayan, Tolbo, Holboo, Bust, Sangiyn Dalai, Tunamal, Dorgon, Uureg, Telmen, Hyargas, Uvs, Erkhel and Oygon, all of which showed a wide range of salinity between 0.16 and 24.9 g l -1 . Lake water was classified into four types: six fresh (less than 0.5 g l -1 salinity), three subsaline (0.5-3 g l -1 ), seven hyposaline (3-20 g l -1 ) and two mesosaline (20-50 g l -1 ) lakes. Predominant cations and anions in the order of dominance were Ca, Mg [ Na [ K and HCO 3 [ SO 4 , Cl in freshwater lakes, Na [ Mg [ Ca, K and HCO 3 , Cl [ SO 4 in subsaline lakes, and Na [ Mg [ K, Ca and Cl, SO 4 [ HCO 3 in hyposaline and mesosaline lakes. Nitrogenous and phosphorus nutrients in the waters were low, seemingly caused by the low loads from their watersheds, where the ground was free of vegetation with an extremely low level of human activity. The present investigations revealed some 234 taxa of phytoplankton and 38 of zooplankton. The PC:PN:PP stoichiometric ratio by weight was (22-202):(3-27):1. Phosphorus was assessed as the potential limiting parameter in eight lakes, nitrogen in six and both nutrients in four others. Twelve lakes showed an oligotrophic character, while six were mesotrophic type.The six oligotrophic lakes seemed to be subject to phosphorus limiting phytoplankton growth, four to nitrogen and two to both limitations. In the mesotrophic lakes, on the other hand, phosphorus limitation was verified in two lakes, nitrogen in two others and both in two lakes.

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“…The latest phylogenetic analyses of the genus Cyclotella showed it can be split into several genera and allowed C. ocellata to be assigned a type species of a newly described diatom genus, Pantocsekiella (Á cs et al, 2016). Pantocsekiella ocellata is a highly variable species in terms of its morphology and ecology, therefore a number of studies have been performed to delineate its phenotypic plasticity (Kiss et al, 1996;Edlund et al, 2003;Cremer et al, 2005;Genkal & Popovskaya, 2008;Winder et al, 2009;Duleba et al, 2015). Pantocsekiella ocellata (C. ocellata) is usually considered as a species complex (Edlund et al, 2003) rather than a single species (Duleba et al, 2015).…”

Section: Assemblage Analysesmentioning

confidence: 99%

“…Pantocsekiella ocellata is a highly variable species in terms of its morphology and ecology, therefore a number of studies have been performed to delineate its phenotypic plasticity (Kiss et al, 1996;Edlund et al, 2003;Cremer et al, 2005;Genkal & Popovskaya, 2008;Winder et al, 2009;Duleba et al, 2015). Pantocsekiella ocellata (C. ocellata) is usually considered as a species complex (Edlund et al, 2003) rather than a single species (Duleba et al, 2015). It belongs in a complex together with Cyclotella krammeri Håkansson, Cyclotella rossii Håkansson, Cyclotella tripartita Håkansson, Cyclotella kuetzingiana Thwaites, C. polymorpha B. Meyer & Håkansson, and Cyclotella comensis Grunow (Edlund et al, 2003;Cherepanova et al, 2010;Duleba et al, 2015), with several species transferred into a genus Pantocsekiella K. T. Kiss et Á cs, Kiss et Á cs, comb.…”

Section: Assemblage Analysesmentioning

confidence: 99%

“…Pantocsekiella ocellata (C. ocellata) is usually considered as a species complex (Edlund et al, 2003) rather than a single species (Duleba et al, 2015). It belongs in a complex together with Cyclotella krammeri Håkansson, Cyclotella rossii Håkansson, Cyclotella tripartita Håkansson, Cyclotella kuetzingiana Thwaites, C. polymorpha B. Meyer & Håkansson, and Cyclotella comensis Grunow (Edlund et al, 2003;Cherepanova et al, 2010;Duleba et al, 2015), with several species transferred into a genus Pantocsekiella K. T. Kiss et Á cs, Kiss et Á cs, comb. nov. (Á cs et al, 2016).…”

Section: Assemblage Analysesmentioning

confidence: 99%

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Defining centric diatoms of most relevant phytoplankton functional groups in deep karst lakes

et al. 2016

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Phytoplankton in karst lakes is characterized by co-occurrence of chrysophytes (Chrysophyceae), dinoflagellates (Dinophyceae), and diatoms (Bacillariophyta) as the most diverse and abundant group. Using Reynolds functional approach in ecological phytoplankton investigations makes karstic lakes comparable and facilitates interpretation of their responses to changing environmental conditions. Accurate taxonomic identification to species level, based on precise resolution of specific characteristics by electron microscopy, is essential in order to correctly associate species into coda. This paper defines the most abundant centric diatoms and coexisting species in the phytoplankton of karst lakes in Croatia as a contribution to better description of phytoplankton functional groups dominated by centric diatoms. Several representatives for diatom-based Reynolds functional groups of four lakes in Croatia were described in this paper: Pantocsekiella costei and Stephanocostis chantaica for group A, Pantocsekiella ocellata and Cyclotella distinguenda for group B, and Stephanodiscus neoastraea for group C, together with their ecological preferences which clearly correspond to pertaining functional classification. Selected and coexisting functional groups define natural, oligo-to mesotrophic karst deep lake systems.

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The planktonic diatom diversity of ancient Lake Hovsgol, Mongolia

Cited by 38 publications

References 41 publications

Abundance, spatial distribution, and diet of endangered Hovsgol grayling (Thymallus nigrescens)

Abundance, spatial distribution, and diet of endangered Hovsgol grayling (Thymallus nigrescens)

Comparative investigation of chemical and biological characteristics in waters and trophic state of Mongolian lakes

Defining centric diatoms of most relevant phytoplankton functional groups in deep karst lakes

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