Cyanobacteria of the thermal spring at Pancharevo, Sofia, Bulgaria

Abstract

-Eight taxa of cyanobacteria were identified in the thermal spring at Pancharevo (in the Sofia basin, Bulgaria). As well as the widespread Lyngbya thermalis, Phormidesmis molle (syn. Phormidium molle), Phormidium papyraceum, Phormidium corium and Mastigocladus laminosus, four species were identified for the first time in Bulgaria: Calothrix thermalis, Gloeocapsa gelatinosa, Leibleinia epiphytica and Symploca thermalis.

Diurnal Changes in Active Carbon and Nitrogen Pathways Along the Temperature Gradient in Porcelana Hot Spring Microbial Mat

“…NIES-3754 ( Supplementary Table S3 ). Dominance by this cyanobacterium has also been found in many hot springs around the world ( Finsinger et al, 2008 ; Kaštovský and Johansen, 2008 ; McGregor and Rasmussen, 2008 ; Lukavsky et al, 2011 ), although not always in such high abundance ( Miller et al, 2007 ; McGregor and Rasmussen, 2008 ) as in Porcelana. At the lowest temperatures, the Cyanobacteria contributed most of the total transcripts detected (>90%) during the day ( Figure 2A ), due mostly to the Stigonematales that, in turn, were largely (>90%) represented by members of the genus Mastigocladus sp.…”

Growth characteristics of selected thermophilic strains of cyanobacteria using crossed gradients of temperature and light

“…They were common, and even monopolistic, in the distant past, but are now usually found in thermal springs (Gold 1992(Gold , 1999Hindák 2008a;Hindák & Hindáková 2006Lukavský et al 2011). This is advantageous because thermal springs are relatively very stable, and have been so for maybe thousands of years, and thus resident organisms have had enough time to adapt.…”

“…Ferredioxins for example, from M. laminosus, are toxic and, where present, restrict public use of springs (Mohamed 2008) but have potential anticancer agents (Javor 1999;Pulz & Gross 2004). Finally, bioprospecting also contributes towards check list of algal flora (Lukavský et al 2011). Hydrogen produced by some cyanobacteria is a promising source of energy for the future (Mitsui 1987).…”

“…The aim of this study is to determine and compare growth requirements of selected strains of thermophilic cyanobacteria isolated from thermal springs in Slovakia: 4 from Piešťany, 2 from Sklené Teplice (Hindák & Hindáková 2006, one from thermal waters in Bulgaria (Lukavský et al 2011), 2 strains from the hypersaline lake Chott-el-Djerid (Tunisia) (Hindák 2008b;Hindák & Šmarda 2006) and one strain from Philippines under a wide spectrum of light and temperature conditions using crossed gradients of temperature and light.…”

Laminae development in opal-A precipitates associated with seasonal growth of the form-genus Calothrix (Cyanobacteria), Rehai geothermal area, Tengchong, Yunnan Province, China

“…The form-genus Calothrix, first described and defined by Agardh (1824), is a common filamentous cyanobacterium found in modern spring systems throughout the world, including those in Yellowstone National Park (Weed, 1889;Tilden, 1897Tilden, , 1898Copeland, 1936;Norris and Castenholz, 2005), Iceland (Konhauser et al, 2001), New Zealand (Cassie, 1989), India (Roy et al, 2014), and Bulgaria (Lukavský et al, 2011). Although some species of Calothrix can survive in water temperatures up to 52-54°C (Castenholz, 1969, his Table 3; Colwell and Fuentes, 1975, their Fig.…”