Record Details

Variation of nitrification rates in Chelem lagoon, Yucatan, Mexico

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Variation of nitrification rates in Chelem lagoon, Yucatan, Mexico
 
Creator Valdes, David S
Real, Elizabeth
 
Description 424-428
Sedimentary
nitrification rates were measured by incubation of cores collected from Chelem
lagoon (located in the Yucatan peninsula on
the coast of the Gulf of Mexico). Analyses of pH
and total sulfide in the pore water and total nitrogen

and total phosphorous in the
sediments were also carried out. Effects of human interference were discernible
in the zone of the lagoon more used by man. Peak values of total nitrogen and
total phosphorous with the latter exhibiting significative correlation with the
sediment pH, were observed in this zone. Very low pH values were
measured in Chelem sediments probably due to the high ambient hydrogen sulfide
levels. The high sulphide concentrations resulted in the absence of
nitrification at 5 of the 14 stations sampled; however, on the western side of
the lagoon high nitritication rates (30.2 ± 36.9 μmol/m2/h) were
measured. These rates presented significative correlation with total
phosphorous content of the sediment and with the reported phosphate flux
between sediment and water. The reported ammonium release from the sediments,
was four times the nitrification rate, indicating that just a fraction of the
ammonium produced in Chelem sediments is converted to nitrate.
 
Date 2014-01-15T09:23:43Z
2014-01-15T09:23:43Z
1999-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25703
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.28(4) [December 1999]