DOCSLIB.ORG

Research Article ECOLOGY and DIVERSITY of ALKALIPHILIC CYANOBACTERIA from SODA LAKE LONAR, INDIA

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Research Article ECOLOGY and DIVERSITY of ALKALIPHILIC CYANOBACTERIA from SODA LAKE LONAR, INDIA Available Online at http://www.recentscientific.com International Journal of CODEN: IJRSFP (USA) Recent Scientific International Journal of Recent Scientific Research Research Vol. 11, Issue, 07 (A), pp. 39131-39137, July, 2020 ISSN: 0976-3031 DOI: 10.24327/IJRSR Research Article ECOLOGY AND DIVERSITY OF ALKALIPHILIC CYANOBACTERIA FROM SODA LAKE LONAR, INDIA Devendra Deshmukh1* and Pravin Puranik2 1Department of Microbiology, NKSPT’s, Arts, Science and Commerce College, Badnapur 2Department of Biotechnology, School of Life Sciences, North Maharashtra University, Jalgaon DOI: http://dx.doi.org/10.24327/ijrsr.2020.1107.5447 ARTICLE INFO ABSTRACT Article History: Soda lakes have always attracted the scientific community with the microorganism existing in the Alkaline habitat specifically the cyanobacteria. In the present study based on morphological Received 06th April, 2020 difference 7 species belonging to 4 genera and 2 orders were observed which were isolated from Received in revised form 14th alkaline saline Lake Lonar situated in the Buldhana District of Maharashtra, India. All the May, 2020 cyanobacteria reported were non- heterocystous. A relatively lower diversity of the cyanobacterial Accepted 23rd June, 2020 population was observed in alkaline lake. A significant correlations obtained between ‘total Published online 28th July, 2020 chlorophyll’ and ‘chlorophyll a’ and cyanobacterial density, but some non significant correlations were also observed with some of different physicochemical parameters. Regression analysis for Key Words: significant correlations between environmental parameters of habitats and ‘chlorophyll a’ as well as Lonar Lake, Cyanobacteria, Chlorophyll bacterial count were observed and analyzed. Significant correlation (p<0.05) was obtained between ‘a’, Population density chlorophyll a content, cyanobacterial density, and the physicochemical parameters in the year 2009 as compared to year 2007 and 2008. The fluctuation of the population density during the 3 years of investigation showed a decrease from 2007-2009. The highest population density was noticed in all the three years after the month of May, i.e. the monsoon and post monsoon period and decrease in the density in the month of October. Copyright © Devendra Deshmukh and Pravin Puranik, 2020, this is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. INTRODUCTION Pudukkottai District Tamil Nadu have been isolated (Thajuddin and Subramanian, 1994, Thajuddin et al., 2002). Thermal Phototrophic microorganisms exhibit a remarkable capability waters have also been reported with different cyanobacteria for adaptation and acclimation that allows them to inhabit with a temperature range of 65°C to 68°C (Setchell, 1903). niches representing temporally varying biological extremes of Cyanobacteria like Mastigocoleus laminosus, Phormidium light, salinity, pH and water potential (Gorbushina and tenue and Synechococcus elongates var. amphigranulatus Krumbein, 1999). In aquatic environments, phytoplankton growing at 69°C have been investigated by Lemmermann undergo large increases in cellular pigment concentrations and (1970). A Phormidium sp. tolerating low temperatures from in photosystem size, number, or both in response to diminished extensive ice layers in the Antarctic lakes has been reported irradiance (Falkowski and Owens, 1980; Perry et al., 1981; (Thajuddin and Subramanian, 2005). Sukenik et al., 1987; Sosik et al., 1989). Photoautotrophs can respond to salinity increases by adjusting their internal solute The most common cyanobacterial taxa found in hypersaline concentration via synthesis of organic osmolytes (Kauss, 1978; environments include Aphanothece halophytica and a variety of Dickson and Kirst, 1986; Keller et al., 1999). Enhanced H+ and Lyngbya, Microcoleus, Phormidium, Spirulina and OH- ion concentrations, which occur at pH extremes, can Synechococcus like species. Conspicuously absent are the directly affect cytoplasmic pH and cellular processes heterocystous-forming taxa. Cyanobacteria exist in variety of (Krulwich, 1995). terrestrial environment. The cyanobacteria are a diverse group of microorganisms that Soda lakes are a specific type of salt lake with high to are found in an array of habitats, which vary from aquatic to extremely high carbonate alkalinity, a pH from 9 to 11, and a terrestrial, ultraoligotrophic to hypereutrophic. They are also moderate to extremely high salinity. They are spread all over found in habitats that are considered to be extreme. More than the world, but located, as most inland salt lakes, in arid and 100 species of cyanobacteria from the coastal regions of the semi-arid areas where the evaporative climate favors accumulation of salts in local depressions. The major ions in *Corresponding author: Devendra Deshmukh Department of Microbiology, NKSPT’s, Arts, Science and Commerce College, Badnapur International Journal of Recent Scientific Research Vol. 11, Issue, 07 (A), pp. 39131-39137, July, 2020 Soda Lake brines are sodium, carbonate, bicarbonate, chloride The level of methanol was marked on the tube. After vigorous and sulfate, whereas calcium is virtually absent and magnesium shaking, the tube was placed in a water bath at 60°C for 30 only present at very low concentrations. In contrast to other min. After incubation the tube was allowed to cool at room alkaline environments, such as low-salt alkaline (‘‘cement’’) temperature. The evaporated solvent volume was build up by springs, soda lakes maintain a stable alkaline pH due to the 96% methanol. The tube was centrifuged at 3000-5000 rpm. high buffering capacity of the soluble carbonates. These double The concentrations of total chlorophyll was determined from extreme conditions (i.e. high pH and high salinity) make soda absorbance readings (650 and 665 nm) using the equation lakes a unique ecosystem (Foti et al., 2008). described by APHA (1995). Soda lakes are highly alkaline aquatic environments. Often Estimation of chlorophyll a impermanent in nature, their terrestrial equivalents, soda Chlorophyll a in the water samples was extracted within deserts, represent their desiccated remains. Although Soda several hours after the sampling. Aliquot (10 ml) of water lakes have a worldwide distribution, they are mainly confined sample was mixed with 10 ml of 90% acetone. After shaking, to (sub) tropical latitudes in continental interiors or rain- this was left for 24 h in the dark at room temperature. Shaking shadow zones. Owing to their hostile nature they are often was repeated several times before the determination. The remote from the main centers of human activity and perhaps for concentrations of chlorophyll a were determined from this reason they have been little studied (Jones et al., 1994). absorbance readings (665, 645, 630 nm) using the equation Soda lakes often exhibit blooms of phototrophs such as described by APHA (1995). Cyanospira: Anabaenopsis sp., Chlorococcum sp. and Analysis of physicochemical parameters Pleurocapsa sp. East African lakes contain Spirulina platensis and other lakes harbor Spirulina maxima. The photosynthetic Water samples were collected every month for the three years; yield of Spirulina surpasses that of others in the terrestrial 2007, 2008 and 2009 from the alkaline Lake Lonar. The environment. Significant blooms of red pigmented samples were analyzed as per the standard procedure (APHA, Ectothiorhodospira mobilis and E. vacuolata have been found 1995). Water pH was measured using a glass electrode together with cyanobacteria in soda lakes (Satyanarayana et al., (Systronics, Digital pH meter, India). The electrical 2005). conductivity (EC) was determined by measuring the electrical conductance of the water sample with a conductivity meter In this research article we report the evaluation of the alkaline (Equip-Tronics, India). Salinity (ppt) was calculated using Lake Lonar for cyanobacterial diversity and ecology. It was online conversion of electrical conductivity to salinity at also attempted to find out possible correlation between various sampling temperature physico-chemical and biological parameters and cyanobacterial (http://www.fivecreeks.org/monitor/sal.html). Hardness, population density as well as diversity. phosphates, sulphates, nitrates, and chloride content determined MATERIALS AND METHODS as per APHA (1995). Sample collection Statistical analyses Water samples were collected from Lonar Lake every month All sampling were performed in triplicate. Karl Pearson for the three years (2007, 2008 and 2009) The water samples correlation coefficients were determined between chlorophyll a were collected in sterile plastic bottles and carried to the as well as total chlorophyll and physicochemical parameters of laboratory. Immediately upon reaching, samples were analyzed samples (salinity, hardness, phosphates, sulphates, nitrates, and in laboratory as per the standard procedure (APHA, 1995). Chloride). Minitab 13.31 perpetual software version with basic statistics was used for statistical analyses. Identification of cyanobacteria RESULTS Water samples were used for microscopic observations using Physicochemical properties and microbial population of lake light microscopy (Olympus, GB-Model, India). Cyanobacteria water were identified to genus level as described by Rippka et al. (1979). Water samples were collected in glass bottles and The mean values
Load more

Recommended publications
  • Altai Region, Russia)
    Limnology and Freshwater Biology 2020 (4): 1019-1020 DOI:10.31951/2658-3518-2020-A-4-1019 SI: “The V-th Baikal Symposium on Microbiology” Short communication Salt-dependent succession of phototrophic communities in the soda lake Tanatar VI (Altai Region, Russia) Samylina O.S.1*, Namsaraev Z.B.2 1 Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7-2, Moscow, 117312, Russia 2 NRC “Kurchatov Institute”, Akademika Kurchatova pl., 1, Moscow, 123182, Russia ABSTRACT. The paper describes the changes that occurred in the ecosystem of soda lake Tanatar VI during the 2011-2019 period when salinity decreased from 160-250 to 13-14 g/l Keywords: soda lake, Picocystis, cyanobacteria, biological soil crusts, succession, nitrogen fixation 1. Introduction salinity. Several types of phototrophic communities were detected in the Tanatar VI (Table): 1) Bottom, A great number and variety of saline lakes are floating and epiphytic cyanobacterial biofilms (CB); located in the Kulunda Steppe in the Altai Region. 2) floating and epiphytic Ctenocladus-communities These lakes are exposed to annual and long-standing with filamentous chlorophyte Ctenocladus circinnatus fluctuations of temperature, salinity, flooding and and cyanobacteria (CC); 3) Blooms of unicellular drying periods due to their locality in the zone of algae Picocystis salinarum (P-bloom); 4) Cyanobacterial cold arid climate. There are soda lakes among them, blooms (CB-bloom); 5) Biological soil crusts (BSC) which maintain stable alkaline pH due to a prevalence developed on the moist soil between thickets of of soluble carbonates in the brines. Thereby diversity Salicornia altaica near the lake.
    [Show full text]
  • Metagenomic Insights Into the Uncultured Diversity and Physiology of Microbes in Four Hypersaline Soda Lake Brines
    Lawrence Berkeley National Laboratory Recent Work Title Metagenomic Insights into the Uncultured Diversity and Physiology of Microbes in Four Hypersaline Soda Lake Brines. Permalink https://escholarship.org/uc/item/9xc5s0v5 Journal Frontiers in microbiology, 7(FEB) ISSN 1664-302X Authors Vavourakis, Charlotte D Ghai, Rohit Rodriguez-Valera, Francisco et al. Publication Date 2016 DOI 10.3389/fmicb.2016.00211 Peer reviewed eScholarship.org Powered by the California Digital Library University of California ORIGINAL RESEARCH published: 25 February 2016 doi: 10.3389/fmicb.2016.00211 Metagenomic Insights into the Uncultured Diversity and Physiology of Microbes in Four Hypersaline Soda Lake Brines Charlotte D. Vavourakis 1, Rohit Ghai 2, 3, Francisco Rodriguez-Valera 2, Dimitry Y. Sorokin 4, 5, Susannah G. Tringe 6, Philip Hugenholtz 7 and Gerard Muyzer 1* 1 Microbial Systems Ecology, Department of Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, Netherlands, 2 Evolutionary Genomics Group, Departamento de Producción Vegetal y Microbiología, Universidad Miguel Hernández, San Juan de Alicante, Spain, 3 Department of Aquatic Microbial Ecology, Biology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, Ceskéˇ Budejovice,ˇ Czech Republic, 4 Research Centre of Biotechnology, Winogradsky Institute of Microbiology, Russian Academy of Sciences, Moscow, Russia, 5 Department of Biotechnology, Delft University of Technology, Delft, Netherlands, 6 The Department of Energy Joint Genome Institute, Walnut Creek, CA, USA, 7 Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences and Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia Soda lakes are salt lakes with a naturally alkaline pH due to evaporative concentration Edited by: of sodium carbonates in the absence of major divalent cations.
    [Show full text]
  • Hidden Diversity of Plankton in the Soda Lake Nakuru, Kenya, During A
    Hydrobiologia (2013) 702:95–103 DOI 10.1007/s10750-012-1310-y PRIMARY RESEARCH PAPER Hidden diversity of eukaryotic plankton in the soda lake Nakuru, Kenya, during a phase of low salinity revealed by a SSU rRNA gene clone library Wei Luo • Kiplagat Kotut • Lothar Krienitz Received: 12 July 2012 / Revised: 28 August 2012 / Accepted: 31 August 2012 / Published online: 16 September 2012 Ó Springer Science+Business Media B.V. 2012 Abstract A SSU rRNA gene clone library was Our findings reveal a hidden diversity, which would constructed to establish the diversity of eukaryotic not have been detected by traditional observations. plankton in the African soda lake Nakuru during a phase of low salinity (9.7 ppt = hyposaline). Nor- Keywords Chlorophyta Á Clone library Á Lake mally, the lake is mesosaline (up to 50 ppt) and its Nakuru Á Lesser Flamingo Á Phytoflagellates Á phytoplankton is dominated by few species of cyano- Soda lakes Á SSU rRNA bacteria, in particular Arthrospira fusiformis, which is the main food resource of Lesser Flamingos. Our study recovered a unique phytoplankton species composi- Introduction tion characterized by a high diversity of monadoid and coccoid green algae. Out of 77 clones detected, 52 The phytoplankton of saline-alkaline lakes in the Great belonged to Chlorophyta. Many of the chlorophytes African Rift Valley usually is dominated by cyano- were transported from the catchment area into the lake bacteria, mainly Arthrospira fusiformis (Voronichin) through small seasonal rivers and an outflow of the Koma´rek et Lund (often erroneously identified as Nakuru town sewage treatment plant. Other phyloge- ‘‘Spirulina platensis’’), which forms the food base for netic groups detected were Fungi, Cryptophyta, hundreds of thousands of Lesser Flamingos (Phoenic- Jakobida, Alveolata, Stramenopiles, and Metazoa.
    [Show full text]
  • 24-13 Robert
    www.roavs.com EISSN: 2223-0343 Research Opinions in Animal & Veterinary Sciences Cyanobacterial toxins and bacterial infections are the possible causes of mass mortality of lesser flamingos in Soda lakes in northern Tanzania Robert D. Fyumagwa 1* , Zablon Bugwesa 1, Machoke Mwita 1, Emilian S. Kihwele 2, Athanas Nyaki 3, Robinson H. Mdegela 4 and Donald G. Mpanduji 4 1Tanzania Wildlife Research Institute (TAWIRI), P.O.Box 661, Arusha, Tanzania; 2Serengeti Nattional Park P. O. Box 3134, Arusha, Tanzania; 3Ngorongoro Conservation Area Authority (NCAA) P. O. Box 1, Ngorongoro, Aursha, Tanzania; 4Faculty of Veterinary Medicine, Sokoine University of Agriculture (SUA), P. O. Box 3022, Morogoro, Tanzania Abstract During the mass die-off of lesser flamingos in Soda lakes of Tanzania in 2000, 2002 and 2004, clinicopathological and toxicological investigations were made in order to elucidate the likely cause of mortality. Water and tissue samples were collected from the lakes and from dead flamingos respectively. While water samples were analyzed for pesticide residues, tissues were analyzed for pesticide residues and cyanotoxins. The significant pathological lesions observed in fresh carcasses included oedema in lungs, enlarged liver, haemorrhages in liver with multiple necrotic foci, haemorrhages in kidneys and haemorrhages in intestines with erosion of mucosa. Analysis of cyanotoxins revealed presence of neurotoxin (anatoxin-a) and hepatotoxins (microcystins LR, RR). Concentrations of microcystins LR were significantly higher (P = 0.0003) in liver than in other tissues. Based on clinicopathological findings and concentrations of the detected cyanotoxins, it is suspected that cyanobacterial toxins concurrent with secondary bacterial infection were the likely cause of the observed mortalities in flamingos.
    [Show full text]
  • The Soda Lakes of Nhecolândia: a Conservation Opportunity for The
    Perspectives in Ecology and Conservation 17 (2019) 9–18 ´ Supported by Boticario Group Foundation for Nature Protection www.perspectecolconserv.com Essays and Perspectives The soda lakes of Nhecolândia: A conservation opportunity for the Pantanal wetlands a b c,∗ d Renato L. Guerreiro , Ivan Bergier , Michael M. McGlue , Lucas V. Warren , b e d Urbano Gomes Pinto de Abreu , Jônatas Abrahão , Mario L. Assine a Instituto Federal de Educac¸ ão, Ciência e Tecnologia do Paraná, Av. Cívica, 475, 85935-000 Assis Chateaubriand, PR, Brazil b Embrapa Pantanal, Rua 21 de Setembro, 1880, 79302-090 Corumbá, MS, Brazil c Department of Earth and Environmental Sciences, University of Kentucky, 121 Washington Ave, Lexington, KY 40506, USA d Instituto de Geociências e Ciências Exatas, Unesp – Universidade Estadual Paulista, Avenida 24-A, Bela Vista, Rio Claro, SP CEP 13506-900, Brazil e Laboratório de Vírus, Instituto de Ciências Biológicas, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil a a b s t r a c t r t i c l e i n f o Article history: The Pantanal is the most conserved biome in Brazil and among the last wild refuges in South Amer- Received 2 July 2018 ica, but intensification of agriculture and other land use changes present challenges for protecting this Accepted 26 November 2018 exceptionally biodiverse wetland ecosystem. Recent studies have shed new light on the origins and bio- Available online 11 December 2018 geochemistry of a suite of >600 small saline-alkaline lakes in Nhecolândia, a floodplain setting located south of the Taquari River in south-central Pantanal.
    [Show full text]
  • First Insights Into the Impacts of Benthic Cyanobacterial Mats on Fish
    www.nature.com/scientificreports OPEN First insights into the impacts of benthic cyanobacterial mats on fsh herbivory functions on a nearshore coral reef Amanda K. Ford 1,2*, Petra M. Visser 3, Maria J. van Herk3, Evelien Jongepier 4 & Victor Bonito5 Benthic cyanobacterial mats (BCMs) are becoming increasingly common on coral reefs. In Fiji, blooms generally occur in nearshore areas during warm months but some are starting to prevail through cold months. Many fundamental knowledge gaps about BCM proliferation remain, including their composition and how they infuence reef processes. This study examined a seasonal BCM bloom occurring in a 17-year-old no-take inshore reef area in Fiji. Surveys quantifed the coverage of various BCM-types and estimated the biomass of key herbivorous fsh functional groups. Using remote video observations, we compared fsh herbivory (bite rates) on substrate covered primarily by BCMs (> 50%) to substrate lacking BCMs (< 10%) and looked for indications of fsh (opportunistically) consuming BCMs. Samples of diferent BCM-types were analysed by microscopy and next-generation amplicon sequencing (16S rRNA). In total, BCMs covered 51 ± 4% (mean ± s.e.m) of the benthos. Herbivorous fsh biomass was relatively high (212 ± 36 kg/ha) with good representation across functional groups. Bite rates were signifcantly reduced on BCM-dominated substratum, and no fsh were unambiguously observed consuming BCMs. Seven diferent BCM-types were identifed, with most containing a complex consortium of cyanobacteria. These results provide insight into BCM composition and impacts on inshore Pacifc reefs. Tough scarcely mentioned in the literature a decade ago, benthic cyanobacterial mats (BCMs) are receiving increasing attention from researchers and managers as being a nuisance on tropical coral reefs worldwide1–4.
    [Show full text]
  • Local Hopping Mobile DNA Implicated in Pseudogene Formation And
    Vigil-Stenman et al. BMC Genomics (2015) 16:193 DOI 10.1186/s12864-015-1386-7 RESEARCH ARTICLE Open Access Local hopping mobile DNA implicated in pseudogene formation and reductive evolution in an obligate cyanobacteria-plant symbiosis Theoden Vigil-Stenman1*, John Larsson2, Johan A A Nylander3 and Birgitta Bergman1 Abstract Background: Insertion sequences (ISs) are approximately 1 kbp long “jumping” genes found in prokaryotes. ISs encode the protein Transposase, which facilitates the excision and reinsertion of ISs in genomes, making these sequences a type of class I (“cut-and-paste”) Mobile Genetic Elements. ISs are proposed to be involved in the reductive evolution of symbiotic prokaryotes. Our previous sequencing of the genome of the cyanobacterium ‘Nostoc azollae’ 0708, living in a tight perpetual symbiotic association with a plant (the water fern Azolla), revealed the presence of an eroding genome, with a high number of insertion sequences (ISs) together with an unprecedented large proportion of pseudogenes. To investigate the role of ISs in the reductive evolution of ‘Nostoc azollae’ 0708, and potentially in the formation of pseudogenes, a bioinformatic investigation of the IS identities and positions in 47 cyanobacterial genomes was conducted. To widen the scope, the IS contents were analysed qualitatively and quantitatively in 20 other genomes representing both free-living and symbiotic bacteria. Results: Insertion Sequences were not randomly distributed in the bacterial genomes and were found to transpose short distances from their original location (“local hopping”) and pseudogenes were enriched in the vicinity of IS elements. In general, symbiotic organisms showed higher densities of IS elements and pseudogenes than non-symbiotic bacteria.
    [Show full text]
  • Abundance, Distribution, and Diversity of Viruses in Alkaline, Hypersaline Mono Lake, California S
    Abundance, Distribution, and Diversity of Viruses in Alkaline, Hypersaline Mono Lake, California S. Jiang1, G. Steward2, R. Jellison3, W. Chu1 and S. Choi1 (1) Environmental Analysis and Design, University of California, Irvine, CA 92696, USA (2) Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI 96822, USA (3) Marine Science Institute, University of California, Santa Barbara, CA 93106, USA Received: 25 March 2003 / Accepted: 11 June 2003 / Online publication: 20 October 2003 Abstract Introduction Mono Lake is a large (180 km2), alkaline (pH ~ 10), Viruses are an integral part of aquatic microbial com- ) moderately hypersaline (70–85 g kg 1) lake lying at the munities and can be a significant source of bacterial western edge of the Great Basin. An episode of persistent mortality [27]. They are also capable of mediating chemical stratification (meromixis) was initiated in 1995 processes such as transduction, lysogenic conversion, and and has resulted in depletion of oxygen and accumula- species successions and help to maintain microbial di- tion of ammonia and sulfide beneath the chemocline. versity [6]. Over the past decade, viral ecology has been Although previous studies have documented high bac- studied in a wide range of aquatic habitats including terial abundances and marked seasonal changes in phy- rivers, lakes, oceans and seas, sea ice [16], and solar sal- toplankton abundance and community composition, terns [7]. The results indicate that viruses are truly there have been no previous reports on the occurrence of ubiquitous, though their impact on microbial commu- viruses in this unique lake. Based on the high concen- nities can be variable.
    [Show full text]
  • Microbial Diversity of Soda Lake Habitats
    Microbial Diversity of Soda Lake Habitats Von der Gemeinsamen Naturwissenschaftlichen Fakultät der Technischen Universität Carolo-Wilhelmina zu Braunschweig zur Erlangung des Grades eines Doktors der Naturwissenschaften (Dr. rer. nat.) genehmigte D i s s e r t a t i o n von Susanne Baumgarte aus Fritzlar 1. Referent: Prof. Dr. K. N. Timmis 2. Referent: Prof. Dr. E. Stackebrandt eingereicht am: 26.08.2002 mündliche Prüfung (Disputation) am: 10.01.2003 2003 Vorveröffentlichungen der Dissertation Teilergebnisse aus dieser Arbeit wurden mit Genehmigung der Gemeinsamen Naturwissenschaftlichen Fakultät, vertreten durch den Mentor der Arbeit, in folgenden Beiträgen vorab veröffentlicht: Publikationen Baumgarte, S., Moore, E. R. & Tindall, B. J. (2001). Re-examining the 16S rDNA sequence of Halomonas salina. International Journal of Systematic and Evolutionary Microbiology 51: 51-53. Tagungsbeiträge Baumgarte, S., Mau, M., Bennasar, A., Moore, E. R., Tindall, B. J. & Timmis, K. N. (1999). Archaeal diversity in soda lake habitats. (Vortrag). Jahrestagung der VAAM, Göttingen. Baumgarte, S., Tindall, B. J., Mau, M., Bennasar, A., Timmis, K. N. & Moore, E. R. (1998). Bacterial and archaeal diversity in an African soda lake. (Poster). Körber Symposium on Molecular and Microsensor Studies of Microbial Communities, Bremen. II Contents 1. Introduction............................................................................................................... 1 1.1. The soda lake environment .................................................................................
    [Show full text]
  • Downloaded Within This Season
    bioRxiv preprint doi: https://doi.org/10.1101/2021.03.02.433535; this version posted March 2, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 1 Spatio-temporal modelling for the evaluation of an altered Indian saline 2 Ramsar site and its drivers for ecosystem management and restoration 3 4 5 Rajashree Naik¶ and L.K. Sharma¶* 6 7 Department of Environmental Science, School of Earth Sciences, Central University of 8 Rajasthan, Bandarsindri, Ajmer (Raj.) India 9 10 *Corresponding author 11 12 E-mail: [email protected], 13 14 Abstract 15 Saline wetlands are keystone ecosystems in arid and semi-arid landscapes that are currently 16 under severe threat. This study conducted spatio-temporal modelling of the largest saline Ramsar 17 site of India, in Sambhar wetland from 1963-2059. One CORONA aerial photograph of 1963 and 18 Landsat images of 1972, 1981, 1992, 2009, and 2019 were acquired and classified under 8 classes 19 as Aravalli, barren land, saline soil, salt crust, saltpans, waterbody, settlement, and vegetation for 20 spatial modelling integrated with bird census, soil-water parameters, GPS locations, and 21 photographs. Past decadal area statistics state reduction of waterbody from 30.7 to 3.4% at constant 22 rate (4.23%) to saline soil. Saline soil increased from 12.4 to 21.7% and saline soil converted to 23 barren land from 45.4 to 49.6%; saltpans from 7.4 to 14% and settlement from increased 0.1 to 24 1.3% till 2019.
    [Show full text]
  • Potential Applications of Native Cyanobacterium Isolate (Arthrospira Platensis NIOF17/003) for Biodiesel Production and Utilizat
    sustainability Article Potential Applications of Native Cyanobacterium Isolate (Arthrospira platensis NIOF17/003) for Biodiesel Production and Utilization of Its Byproduct in Marine Rotifer (Brachionus plicatilis) Production Mohamed A. Zaki 1, Mohamed Ashour 2,* , Ahmed M. M. Heneash 2, Mohamed M. Mabrouk 3, Ahmed E. Alprol 2, Hanan M. Khairy 2, Abdelaziz M. Nour 1, Abdallah Tageldein Mansour 4,5 , Hesham A. Hassanien 4,6 , Ahmed Gaber 7 and Mostafa E. Elshobary 8,9,* 1 Animal and Fish Production Department, Faculty of Agriculture, Alexandria University, Alexandria 21545, Egypt; [email protected] (M.A.Z.); [email protected] (A.M.N.) 2 National Institute of Oceanography and Fisheries (NIOF), Cairo 11516, Egypt; [email protected] (A.M.M.H.); [email protected] (A.E.A.); [email protected] (H.M.K.) 3 Fish Division, Animal Production Department, Faculty of Agriculture, Al-Azhar University, Cairo 11823, Egypt; [email protected] 4 Animal and Fish Production Department, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia; [email protected] (A.T.M.); [email protected] (H.A.H.) 5 Fish and Animal Production Department, Faculty of Agriculture (Saba Basha), Alexandria University, Citation: Zaki, M.A.; Ashour, M.; Alexandria 21531, Egypt Heneash, A.M.M.; Mabrouk, M.M.; 6 Animal Production Department, Faculty of Agriculture, Cairo University, Gamma St., Giza 12613, Egypt Alprol, A.E.; Khairy, H.M.; Nour, 7 Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; A.M.; Mansour, A.T.; Hassanien, H.A.; [email protected] 8 Gaber, A.; et al.
    [Show full text]
  • Detailed Characterization of the Arthrospira Type Species Separating
    www.nature.com/scientificreports OPEN Detailed characterization of the Arthrospira type species separating commercially grown Received: 13 August 2018 Accepted: 27 November 2018 taxa into the new genus Limnospira Published: xx xx xxxx (Cyanobacteria) Paulina Nowicka-Krawczyk 1, Radka Mühlsteinová2 & Tomáš Hauer 2 The genus Arthrospira has a long history of being used as a food source in diferent parts of the world. Its mass cultivation for production of food supplements and additives has contributed to a more detailed study of several species of this genus. In contrast, the type species of the genus (A. jenneri), has scarcely been studied. This work adopts a polyphasic approach to thoroughly investigate environmental samples of A. jenneri, whose persistent bloom was noticed in an urban reservoir in Poland, Central Europe. The obtained results were compared with strains designated as A. platensis, A. maxima, and A. fusiformis from several culture collections and other Arthrospira records from GenBank. The comparison has shown that A. jenneri difers from popular species that are massively utilized commercially with regard to its cell morphology, ultrastructure and ecology, as well as its 16S rRNA gene sequence. Based on our fndings, we propose the establishment of a new genus, Limnospira, which currently encompasses three species including the massively produced L. (A.) fusiformis and L. (A.) maxima with the type species Limnospira fusiformis. Among the simple trichal cyanobacteria, three genera possess helically-coiled trichomes as a prominent dia- critical feature: Spirulina Turpin ex Gomont 1892, Halospirulina Nübel, Garcia-Pichel et Muyzer 2000, and Arthrospira Stizenberger ex Gomont 1892. Te latter is a widely-known taxon with long history of use as a food source, for example as dihé in Africa or tecuitlatl in Mexico1–3.
    [Show full text]