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Thermophilic microbial mats in a tropical geothermal location display pronounced seasonal changes but appear resilient to stochastic disturbance.
Environ Microbiol. 2007 Dec; 9(12):3065-76.EM

Abstract

We demonstrate for the first time a dynamic seasonality within thermophilic mat communities in a tropical geothermal spring. Biomass fluctuated such that it is greatest in the dry season, before falling drastically as the summer rains arrive, and then re-colonization culminates in a new climax in the following dry season. Species richness estimates based upon 16S rRNA gene environmental phylotypes mirrored this pattern, where those unique to the dry season disappear during the wet season only to reappear the following year, and vice versa. Relative abundance of some phototrophic phylotypes was also shown to vary seasonally. Environmental variables within the thermal environment that were most closely correlated to these variations were temperature and phosphate, with the latter a covariable to heavy seasonal tropical monsoon rainfall. Stochastic disturbance caused by a strong typhoon caused significant although temporary effects and both diversity and standing biomass recovered within a few months. Tropical hot spring communities clearly function under a fundamentally different set of abiotic variables from those in temperate locations which do not display seasonality. This is of particular relevance to bioprospecting efforts where targeting the most biodiverse niche is desired, because future sampling strategies for tropical thermal environments should consider diversity on temporal as well as spatial scales.

Authors+Show Affiliations

School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

17991034

Citation

Lacap, Donnabella C., et al. "Thermophilic Microbial Mats in a Tropical Geothermal Location Display Pronounced Seasonal Changes but Appear Resilient to Stochastic Disturbance." Environmental Microbiology, vol. 9, no. 12, 2007, pp. 3065-76.
Lacap DC, Barraquio W, Pointing SB. Thermophilic microbial mats in a tropical geothermal location display pronounced seasonal changes but appear resilient to stochastic disturbance. Environ Microbiol. 2007;9(12):3065-76.
Lacap, D. C., Barraquio, W., & Pointing, S. B. (2007). Thermophilic microbial mats in a tropical geothermal location display pronounced seasonal changes but appear resilient to stochastic disturbance. Environmental Microbiology, 9(12), 3065-76.
Lacap DC, Barraquio W, Pointing SB. Thermophilic Microbial Mats in a Tropical Geothermal Location Display Pronounced Seasonal Changes but Appear Resilient to Stochastic Disturbance. Environ Microbiol. 2007;9(12):3065-76. PubMed PMID: 17991034.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Thermophilic microbial mats in a tropical geothermal location display pronounced seasonal changes but appear resilient to stochastic disturbance. AU - Lacap,Donnabella C, AU - Barraquio,Wilfredo, AU - Pointing,Stephen B, PY - 2007/11/10/pubmed PY - 2008/1/9/medline PY - 2007/11/10/entrez SP - 3065 EP - 76 JF - Environmental microbiology JO - Environ Microbiol VL - 9 IS - 12 N2 - We demonstrate for the first time a dynamic seasonality within thermophilic mat communities in a tropical geothermal spring. Biomass fluctuated such that it is greatest in the dry season, before falling drastically as the summer rains arrive, and then re-colonization culminates in a new climax in the following dry season. Species richness estimates based upon 16S rRNA gene environmental phylotypes mirrored this pattern, where those unique to the dry season disappear during the wet season only to reappear the following year, and vice versa. Relative abundance of some phototrophic phylotypes was also shown to vary seasonally. Environmental variables within the thermal environment that were most closely correlated to these variations were temperature and phosphate, with the latter a covariable to heavy seasonal tropical monsoon rainfall. Stochastic disturbance caused by a strong typhoon caused significant although temporary effects and both diversity and standing biomass recovered within a few months. Tropical hot spring communities clearly function under a fundamentally different set of abiotic variables from those in temperate locations which do not display seasonality. This is of particular relevance to bioprospecting efforts where targeting the most biodiverse niche is desired, because future sampling strategies for tropical thermal environments should consider diversity on temporal as well as spatial scales. SN - 1462-2912 UR - https://www.unboundmedicine.com/medline/citation/17991034/Thermophilic_microbial_mats_in_a_tropical_geothermal_location_display_pronounced_seasonal_changes_but_appear_resilient_to_stochastic_disturbance_ L2 - https://doi.org/10.1111/j.1462-2920.2007.01417.x DB - PRIME DP - Unbound Medicine ER -