Hypersaline Cyanobacterial Mats as Indicators of Elevated Tropical Hurricane Activity and Associated Climate Change

Paerl, Hans W.; Steppe, Timothy F.; Buchan, Kenneth C.; Potts, Malcolm

doi:10.1639/0044-7447(2003)032[0087:hcmaio]2.0.co;2

Cited by 12 publications

(28 citation statements)

References 10 publications

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“…The overall results point to a transitional lagoonmarine environment containing a wide variety of species (Karl 2007;Paerl et al 2003;Piccini et al 2006). Variable environments are known to support a wider variety of species than stable environments in which the best-adapted species will frequently out-compete all others.…”

Section: Discussionmentioning

confidence: 81%

Microbial identification of the Nichupte-Bojorquez coastal lagoon in Cancun, Mexico

et al. 2008

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The microbial community of the Nichupte-Bojorquez lagoon system located in Cancun, Mexico was evaluated using surface-water samples that were collected before and after the hurricane Wilma impacted the area on October 2005. The analysis was done using a culture-independent molecular approach involving Amplified Ribosomal DNA Restriction Analysis, and CLuster ANalysis of Sequences. A total of 61 16S ribosomal RNA genes were differentially selected and screened. The results show a bacterial profile dominated by CytophagaFlavobacteria/Flexibacter-Bacteroidetes group; the Bacteroidetes group in particular. The second most abundant group was assigned to the Proteobacteria group and a minor proportion of bacteria that belongs to the Cyanobacteria and Bacilli classes. Our study gives the first insight into the bacterial community adapted to this heavily polluted but occasional oligotrophic coastal lagoon; no substantial differences were, however, found.

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Section: Discussionmentioning

confidence: 81%

Microbial identification of the Nichupte-Bojorquez coastal lagoon in Cancun, Mexico

et al. 2008

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“…The water supply for Salt Pond is derived primarily from precipitation to storm overwash (Park et al 2009). The study area was chosen because of the documented presence of microbial mats (Pinckney and Paerl 1997;Paerl et al 2000Paerl et al , 2003, extensive research in the area and the logistical benefits available at the Gerace Research Centre.…”

Section: Study Areamentioning

confidence: 99%

“…The redox zonation that appears to control CaCO 3 precipitation-dissolution in microbial mats can easily be affected diurnally, seasonally and by episodic events such as hurricanes or droughts (Pinckney et al 1995;Paerl et al 2003). Shifts in microbial community and chemical gradients during a diurnal cycle have been documented ).…”

Section: Carbonate Precipitation-dissolutionmentioning

confidence: 99%

“…Typically, phototropic communities dominate the upper portion of the mats, with heterotrophic organisms below (Riding 2000). Heterotrophic bacteria decompose available organic material within the mats through processes such as denitrification, sulfate reduction and methanogenesis, which occur successively with increasing depth (Riding 2000;Paerl and Pinckney 1996;Paerl et al 2003).…”

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confidence: 99%

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Biogeochemical Stratification and Carbonate Dissolution-Precipitation in Hypersaline Microbial Mats (Salt Pond, San Salvador, The Bahamas)

et al. 2011

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Microbial mat communities host complex biogeochemical processes and play a role in the formation of most carbonate rocks by influencing both carbonate precipitation and dissolution. In this study, the biogeochemistry of microbial mats from the hypersaline Salt Pond, San Salvador, Bahamas are described using scanning electron microscopy, X-ray diffraction, microelectrode profiling, fatty acid methyl esters, and carbon and nitrogen analyses. These microbial mats are distinctly layered both chemically and with regard to composition of microbial community, where significant (q \ 0.05) differences are noted between layers and cores. Furthermore, an oxic upper zone and an H 2 S-rich lower zone dominate the Salt Pond microbial mats, where H 2 S concentrations were measured approaching 8 mM. The high H 2 S concentrations along with the lacking evidence of mineral precipitation in SEM images point to the prevalence of carbonate dissolution. Moreover, the high concentrations of organics (3-9%) reveal that the mats are self-sourcing and can provide ample fuel to sustain the highly active heterotrophic (both aerobic and anaerobic) metabolism. Seasonal differences in sulfide and oxygen concentrations in Salt Pond mats indicate that the carbonate dissolution and precipitation reactions are dynamic in this hypersaline lake.

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“…A wide variety of active N 2 -fixers has been observed in the plankton and benthos of estuarine, coastal, and open-ocean environments, and even hypersaline lakes and lagoons (Paerl et al , 2003Potts 1980). However, hypersaline conditions, where salinity greatly exceeds (by more than fourfold) seawater levels (35 psu), have been shown to inhibit N 2 fixation (Paerl et al 2003;Pinckney and Paerl 1997). Factors other than salinity, including nutrient limitation, turbulence, organic matter supply, and grazing (Marino et al 2006), appear to control N 2 fixation activity along the freshwater to open ocean salinity continuum.…”

Section: Ecophysiological Aspects Of N 2 Fixationmentioning

confidence: 99%

Molecular Ecological Aspects of Nitrogen Fixation in the Marine Environment

Zehr

Paerl

2008

Microbial Ecology of the Oceans

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Hypersaline Cyanobacterial Mats as Indicators of Elevated Tropical Hurricane Activity and Associated Climate Change

Cited by 12 publications

References 10 publications

Microbial identification of the Nichupte-Bojorquez coastal lagoon in Cancun, Mexico

Microbial identification of the Nichupte-Bojorquez coastal lagoon in Cancun, Mexico

Biogeochemical Stratification and Carbonate Dissolution-Precipitation in Hypersaline Microbial Mats (Salt Pond, San Salvador, The Bahamas)

Molecular Ecological Aspects of Nitrogen Fixation in the Marine Environment

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