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Community structure of free-floating filamentous cyanobacterial mats from the Wonder Lake geothermal springs in the Philippines.
Can J Microbiol. 2005 Jul; 51(7):583-9.CJ

Abstract

Cyanobacterial mats were characterized from pools of 45-60 degrees C in near-neutral pH, low-sulphide geothermal springs in the Philippines. Mat structure did not vary with temperature. All mats possessed highly ordered layers of airspaces at both the macroscopic and microscopic level, and these appear to be an adaptation to a free-floating growth habit. Upper mat layers supported biomass with elevated carotenoid:chlorophyll a ratios and an as yet uncharacterized waxy layer on the dorsal surface. Microscopic examination revealed mats comprised a single Fischerella morphotype, with abundant heterocysts throughout mats at all temperatures. Molecular analysis of mat community structure only partly matched morphological identification. All samples supported greater 16S rDNA-defined diversity than morphology suggested, with a progressive loss in the number of genotypes with increasing temperature. Fischerella-like sequences were recovered from mats occurring at all temperatures, but some mats also yielded Oscillatoria-like sequences, although corresponding phenotypes were not observed. Phylogenetic analysis revealed that Fischerella-like sequences were most closely affiliated with Fischerella major and the Oscillatoria-like sequences with Oscillatoria amphigranulata.

Authors+Show Affiliations

Extremophiles Research Group, Department of Ecology and Biodiversity, The University of Hong Kong, China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16175207

Citation

Lacap, Donnabella C., et al. "Community Structure of Free-floating Filamentous Cyanobacterial Mats From the Wonder Lake Geothermal Springs in the Philippines." Canadian Journal of Microbiology, vol. 51, no. 7, 2005, pp. 583-9.
Lacap DC, Smith GJ, Warren-Rhodes K, et al. Community structure of free-floating filamentous cyanobacterial mats from the Wonder Lake geothermal springs in the Philippines. Can J Microbiol. 2005;51(7):583-9.
Lacap, D. C., Smith, G. J., Warren-Rhodes, K., & Pointing, S. B. (2005). Community structure of free-floating filamentous cyanobacterial mats from the Wonder Lake geothermal springs in the Philippines. Canadian Journal of Microbiology, 51(7), 583-9.
Lacap DC, et al. Community Structure of Free-floating Filamentous Cyanobacterial Mats From the Wonder Lake Geothermal Springs in the Philippines. Can J Microbiol. 2005;51(7):583-9. PubMed PMID: 16175207.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Community structure of free-floating filamentous cyanobacterial mats from the Wonder Lake geothermal springs in the Philippines. AU - Lacap,Donnabella C, AU - Smith,Gavin J D, AU - Warren-Rhodes,Kimberley, AU - Pointing,Stephen B, PY - 2005/9/22/pubmed PY - 2006/3/3/medline PY - 2005/9/22/entrez SP - 583 EP - 9 JF - Canadian journal of microbiology JO - Can J Microbiol VL - 51 IS - 7 N2 - Cyanobacterial mats were characterized from pools of 45-60 degrees C in near-neutral pH, low-sulphide geothermal springs in the Philippines. Mat structure did not vary with temperature. All mats possessed highly ordered layers of airspaces at both the macroscopic and microscopic level, and these appear to be an adaptation to a free-floating growth habit. Upper mat layers supported biomass with elevated carotenoid:chlorophyll a ratios and an as yet uncharacterized waxy layer on the dorsal surface. Microscopic examination revealed mats comprised a single Fischerella morphotype, with abundant heterocysts throughout mats at all temperatures. Molecular analysis of mat community structure only partly matched morphological identification. All samples supported greater 16S rDNA-defined diversity than morphology suggested, with a progressive loss in the number of genotypes with increasing temperature. Fischerella-like sequences were recovered from mats occurring at all temperatures, but some mats also yielded Oscillatoria-like sequences, although corresponding phenotypes were not observed. Phylogenetic analysis revealed that Fischerella-like sequences were most closely affiliated with Fischerella major and the Oscillatoria-like sequences with Oscillatoria amphigranulata. SN - 0008-4166 UR - https://www.unboundmedicine.com/medline/citation/16175207/Community_structure_of_free_floating_filamentous_cyanobacterial_mats_from_the_Wonder_Lake_geothermal_springs_in_the_Philippines_ L2 - https://cdnsciencepub.com/doi/10.1139/w05-038?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -