scholarly journals Correction: Brad et al. The Chemoautotrophically Based Movile Cave Groundwater Ecosystem, a Hotspot of Subterranean Biodiversity. Diversity 2021, 13, 128

Diversity ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 461
Author(s):  
Traian Brad ◽  
Sanda Iepure ◽  
Serban M. Sarbu
Keyword(s):  
Movile Cave

The authors wish to make the following corrections to this paper [...]

Life cycle and calculation of the intrinsic rate of natural increase of two bacterivorous nematodes, Panagrolaimus sp. and Poikilolaimus sp. from chemoautotrophic Movile Cave, Romania

Nematology ◽  
2007 ◽  
Vol 9 (2) ◽  
pp. 271-284 ◽  
Author(s):  
Daniel Muschiol ◽  
Walter Traunspurger
Keyword(s):  
Life Cycle ◽  
Body Length ◽  
Generation Time ◽  
Microbial Mats ◽  
Somatic Growth ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Natural Increase ◽  
Net Reproductive Rate ◽  
Movile Cave

AbstractThe life cycle and somatic growth of two bacterivorous nematodes, Panagrolaimus sp. and Poikilolaimus sp., isolated from chemoautotrophic microbial mats in Movile Cave, Romania, were studied in monoxenic cultures at 20°C with Escherichia coli as the food source. A method is described that allows simultaneous investigation of the somatic growth pattern, age-specific fecundity, and age-specific mortality of single individuals with high accuracy. Somatic growth curves of the species are presented. During juvenile development, both species showed a strict linear increase in body length, whereas body weight increased exponentially. Growth was continuous without lag phases. The relationships between fresh weight, W (μg), and body length, L (mm), were W = 1.6439L2.7672 for Poikilolaimus sp. and W = 0.2085L4.0915 for Panagrolaimus sp. Life tables and fecundity schedules for the two species are presented. In addition, demographic parameters were calculated. For Panagrolaimus, the intrinsic rate of natural increase (rm), calculated according to the Lotka equation, was 0.309, the net reproductive rate (R0) 64, the mean generation time (T) 13.8 days and the minimum generation time (Tmin) 9.5 days. The corresponding values for Poikilolaimus were rm = 0.165, R0 = 108, T = 26.2 and Tmin = 19.5. Panagrolaimus produced fewer progeny than Poikilolaimus during its life but exhibited faster population growth due to its faster maturation. It showed a distinct post-reproductive period, whereas Poikilolaimus remained fertile until death.

A new species of the genus Archiboreoiulus Brolemann, 1921 (Diplopoda, Julida) from Movile Cave (Southern Dobrogea, Romania)

Zootaxa ◽  
2020 ◽  
Vol 4802 (3) ◽  
pp. 463-476 ◽  
Author(s):  
ANDREI GIURGINCA ◽  
LIVIU VĂNOAICA ◽  
VLADIMIR ŠUSTR ◽  
KAREL TAJOVSKÝ
Keyword(s):  
New Species ◽  
Distribution Range ◽  
Unknown Species ◽  
European Distribution ◽  
Movile Cave ◽  
A New Species

Up to the present, the genus Archiboreoiulus included only two species: A. sollaudi from France and A. pallidus with a wide European distribution range. Here we describe a previously unknown species of the genus Archiboreoiulus, A. serbansarbui, collected from the mesothermal sulfurous Movile Cave, Mangalia, Romania, harboring a rich and diverse troglobitic community. 

Microbiology of Movile Cave—A Chemolithoautotrophic Ecosystem

2014 ◽  
Vol 31 (3) ◽  
pp. 186-193 ◽  
Author(s):  
Deepak Kumaresan ◽  
Daniela Wischer ◽  
Jason Stephenson ◽  
Alexandra Hillebrand-Voiculescu ◽  
J. Colin Murrell
Keyword(s):  
Movile Cave

scholarly journals Life without light: microbial diversity and evidence of sulfur- and ammonium-based chemolithotrophy in Movile Cave

2009 ◽  
Vol 3 (9) ◽  
pp. 1093-1104 ◽  
Author(s):  
Yin Chen ◽  
Liqin Wu ◽  
Rich Boden ◽  
Alexandra Hillebrand ◽  
Deepak Kumaresan ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Movile Cave

scholarly journals A new species of freshwater flatworm (Platyhelminthes, Tricladida, Dendrocoelidae) inhabiting a chemoautotrophic groundwater ecosystem in Romania

2017 ◽  
Author(s):  
Giacinta Angela Stocchino ◽  
Ronald Sluys ◽  
Mahasaru Kawakatsu ◽  
Serban Mircea Sarbu ◽  
Renata Manconi
Keyword(s):  
New Species ◽  
The Past ◽  
History Of ◽  
Movile Cave ◽  
Annotated Checklist ◽  
A New Species

We report the description of a new species of freshwater flatworm of the genus Dendrocoelum inhabiting the chemoautotrophic ecosystem of Movile Cave as well as several sulfidic wells in the nearby town of Mangalia, thus representing the first planarian species fully described from this extreme biotope. The species was also found in non-sulfidic wells localized in villages in the vicinity of the cave with a total of nine examined populations. Dendrocoelum obstinatum Stocchino & Sluys, sp. nov. represents the first triclad being able to live in both sulfidic and non-sulfidic waters. Among the fauna of the Mangalia sulfidic ecosystem it is the only species found also outside of the current boundaries of the sulfidic aquifer. One possible explanation of this peculiar distribution is that the new species is limited to the old boundaries of the sulfidic aquifer. The latter became much smaller during the hydrogeological history of the region, so that D. obstinatum may be considered to be an indicator of the extension of the sulfidic aquifer in the past of the Mangalia region. In the context of a biogeographic discussion on the distribution of the genus Dendrocoelum we provide an annotated checklist of species reported from Romania.

scholarly journals Genomic and morphologic characterization of a planktonic Thiovulum (Campylobacterota) dominating the surface waters of the sulfidic Movile Cave, Romania

2020 ◽  
Author(s):  
Mina Bizic ◽  
Traian Brad ◽  
Lucian Barbu-Tudoran ◽  
Joost Aerts ◽  
Danny Ionescu ◽  
...  
Keyword(s):  
Surface Waters ◽  
Aquatic Ecosystems ◽  
Elemental Sulfur ◽  
Carbon Fixation ◽  
Ferric Iron ◽  
Hydroxylamine Oxidoreductase ◽  
Type Iv ◽  
Sulfur Globules ◽  
Movile Cave

ABSTRACTLife in Movile Cave (Romania) relies entirely on primary carbon fixation by bacteria oxidizing sulfide, methane and ammonia with oxygen, nitrate, sulfate, and ferric iron. There, large spherical-ovoid bacteria (12-16 μm diameter), rich in intracellular sulfur globules, dominate the stable microbial community in the surface water of a hypoxic Air Bell. These were identified as Thiovulum sp. (Campylobacterota). We obtained a closed genome of this Thiovulum and compared it to that of Thiovulum ES. The genes for oxidizing sulfide to sulfate are absent, therefore, Thiovulum likely avoids constant accumulation of elemental sulfur either by oxidizing sulfide to sulfite which is then excreted, or via dissimilatory nitrate reduction to ammonia using the formate-dependent nitrite reductase or hydroxylamine oxidoreductase. Thus, Thiovulum, found also in other caves, is likely important to both S and N cycles in subterranean aquatic ecosystems. Additionally, using electron microscopy, we suggest that in absence of motor-like structures along the membrane, the peritrichous flagella-like structures are type IV pili, for which genes were found in both Thiovulum genomes. These pili may play a role in veil formation, connecting adjacent cells. The force exerted by coordinated movement of such pili may partly explain the exceptionally fast swimming of these bacteria.

scholarly journals Bacterial metabolism of methylated amines and identification of novel methylotrophs in Movile Cave

2014 ◽  
Vol 9 (1) ◽  
pp. 195-206 ◽  
Author(s):  
Daniela Wischer ◽  
Deepak Kumaresan ◽  
Antonia Johnston ◽  
Myriam El Khawand ◽  
Jason Stephenson ◽  
...  
Keyword(s):  
Bacterial Metabolism ◽  
Movile Cave ◽  
Methylated Amines

Food choice of two bacteria-feeding nematode species dependent on food source, food density and interspecific competition

Nematology ◽  
2013 ◽  
Vol 15 (3) ◽  
pp. 291-301 ◽  
Author(s):  
Sebastian Weber ◽  
Walter Traunspurger
Keyword(s):  
Interspecific Competition ◽  
Food Choice ◽  
Food Source ◽  
Feeding Habits ◽  
Nematode Species ◽  
Food Density ◽  
Free Living ◽  
E Coli ◽  
Stable Environment ◽  
Movile Cave

Feeding selectivity and flexibility are generally poorly understood behaviours of free-living nematodes. In the present study, the food choice and feeding habits of two bacteria-feeding, free-living species, Panagrolaimus cf. thienemanni and Poikilolaimus sp. (Nematoda), isolated from Movile Cave (Romania), were examined with respect to food source, food density and interspecific competition. These two species coexist in a very stable environment, compete for the same food resources, and play a major role in Movile Cave’s food web. Panagrolaimus and Poikilolaimus were found to favour significantly the bacterium Escherichia coli as a food source compared with glucose or algae. High densities of E. coli (109 cells ml−1) were preferred by Panagrolaimus, in contrast to the low densities (106 cells ml−1) preferred by Poikilolaimus. This result held true when the two species were exposed to intra- and interspecific competition, when Panagrolaimus significantly preferred E. coli at densities of 109 cells ml−1, whereas Poikilolaimus, while not significantly preferring a fixed bacterial density, was nonetheless attracted to densities of 105 – 107 cells ml−1. These density-related differences in food choice could explain the ability of these species to coexist without competitive exclusion in the same stable environment of Movile Cave.

scholarly journals Draft Genome Sequences of Facultative Methylotrophs, Gemmobacter sp. Strain LW1 and Mesorhizobium sp. Strain 1M-11, Isolated from Movile Cave, Romania

2015 ◽  
Vol 3 (6) ◽  
Author(s):  
Deepak Kumaresan ◽  
Daniela Wischer ◽  
Alexandra M. Hillebrand-Voiculescu ◽  
J. Colin Murrell
Keyword(s):  
Nitrogen Source ◽  
Water Samples ◽  
Draft Genome ◽  
Microbial Mat ◽  
Genome Sequences ◽  
Carbon And Nitrogen ◽  
Movile Cave ◽  
Methylated Amines

Facultative methylotrophs belonging to the genera Gemmobacter and Mesorhizobium were isolated from microbial mat and cave water samples obtained from the Movile Cave ecosystem. Both bacteria can utilize methylated amines as their sole carbon and nitrogen source. Here, we report the draft genome sequences of Gemmobacter sp. strain LW1 and Mesorhizobium sp. strain IM1.

scholarly journals Aerobic proteobacterial methylotrophs in Movile Cave: genomic and metagenomic analyses

Microbiome ◽  
2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Deepak Kumaresan ◽  
Jason Stephenson ◽  
Andrew C. Doxey ◽  
Hina Bandukwala ◽  
Elliot Brooks ◽  
...  
Keyword(s):  
Movile Cave
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