Jobos Bay NERR Nutrient Metadata January 2003 to December 2003 Latest Update: February 11, 2005Entry ID: CDMO_jobnut01-12.03m
Abstract: Nutrient monitoring is conducted at 26 National Estuarine Research Reserves (NERR) from four locations within or adjacent to the reserve on a monthly basis of the following parameters: orthophosphate, ammonium, nitrite, nitrate, and chlorophyll a. Note: Reserves may collect additional parameters which are available by searching the Yearly Files directory.
Purpose: Research objectives Inorganic nutrients, particularly nitrogen and phosphorus are naturally found in mangrove and estuarine habitats. They can be significantly increased by human activities reaching the system through non-point source run-off or direct discharge. Eutrophication is defined as gradual accumulation of nutrients and organic biomass accompanied with an increase in photosynthesis and a ... decrease in the average depth of the water column caused by the accumulation of sediment. The objective of this study is to provide baseline information on inorganic nutrients and chlorophyll levels in the Jobos Bay estuary. It will also assess nutrients and chlorophyll levels in areas within the reserve that may be receiving impact from human activities from surroundings areas or may act as a habitat gradient in the Bay. In order to compare these with physical water quality parameters, monitoring sites were established at the four YSI’s datasonde stations. Station number nine (9), the impacted site, collects water quality data in a site associated with runoff from littoral and basin mangrove areas. This sampling station is located in the most inland lagoon, closest to the Thermoelectric Power Plant. It is subjected to runoff, which may include potential oil spill contamination from this industrial facility. Information compiled from historical environmental documents, indicate that station nine (9) was used as a disposal site for residues of the previously operating sugar mill operation, and therefore might have high organic input into the sediments. Station number ten (10), located in a mangrove lagoon area towards the southwestern section of Mar Negro is considered the reference or non-impacted site. Station 19 is located in Jobos Bay surrounded by sea grass beds composed of Thallasia testudinum. This station is close to the Power Plant transit channel, which allows barges to bring oil and gas into the Power Plant pier. This area is exposed to barge standings, sediment re-suspension and oil spills. Station 20 is located adjacent to Cayos Caribe reef. Water streams coming from the platform may bring to this station an indication of water conditions behind the coral reef wall. This water are part of the main marine current coming from the eastern side of Jobos Bay that runs along the coast, getting in contact with sensitive areas like coal plant, Phillips Core, Chemsource and other industries.
Associated researchers and projects A water quality monitoring using YSI 6000 data loggers started in December, 1995 to determine pH, salinity, turbidity, temperature, specific conductance, depth, dissolved oxygen saturation and concentration. In April of 2003, an expanded nutrient and chlorophyll monitoring program was established. This one year program will assess nitrogen and chlorophyll loading in a broader geographical area of the Bay. Nine additional stations are being monitored. Other Remarks During year 2003 five (5) important rainfall events occur that had effects in the measurements of the different parameters of the sondes. These events occur: 1) april 8 to 20 with 172.47mm of rainfall 2) august 16 to 29 with 89.66mm of rainfall 3) october 5 to 11 with 145.03mm of rainfall 4) the most important november 6 to 19 with 564.64mm of rainfall, equal to the mean anual rainfall. 5) december 5 to 7 with 100.58mm of rainfall Stations 19 and 20 were found at areas that receive strong waves. Stations 9 and 10 were more protected, receive less wave impact.
SPATIAL DATA ORGANIZATION INFORMATION:
Indirect Spatial Reference: Site location and character The Jobos Bay National Estuarine Research Reserve (JBNERR) is located on the southern coastal plain of the island of Puerto Rico, a reserve within the West Indies geographical area. JBNERR is composed of two major areas: (1) Mar Negro, located on the western margin of the Bay, and (2) Cayos Caribe, a chain of 15 tear-shaped islets located to the southeast. The Mar Negro area comprises the bulk of the Reserve, and consists of mangrove forests and a complex system of lagoons and channels interspersed with salt and mud flats. Coral reefs and sea grass beds, with small beach deposits and upland areas fringe Cayos Caribe mangrove islands. Station 9 is an impacted site and is located on the northeastern section of the Mar Negro component. This sampling station is associated with mangrove lagoon areas and receives runoff from mudflats, the Thermoelectric Power Plant, and adjacent areas. The tidal range varies from 12 to 14 inches in the vicinity of the monitoring station. The salinity at the vicinity of the monitoring station varies from 0.0 ppt to 41.1 ppt. The average depth at station 09 is 1 meter. A thick layer of thin sediments with a high content of organic material covers the bottom. Brown and green algae are also present at this site, but a better assessment is needed. The station pole is located at 17Â° 56' 36.8" N and 66Â° 14' 18.5" W. Station 10 is located in a mangrove lagoon not impacted directly by any upland or marine activities. It provides a reference for comparison of data obtained in other stations, especially to the station in Mar Negro lagoon. The tidal range varies from 12 to 14 inches. The salinity at the vicinity of the monitoring station varies from 0.0 ppt to 41.7 ppt. The average depth at station 10 is 1 meter. The bottom is covered with a layer of fine sediments with organic material, followed by a layer of calcareous material mainly from shells and oysters. At this site we can find sea grass (Thalassia), calcareous algae (Halimeda sp.), green algae (Caulerpa sp.) and brown algae (Dictyota sp.) among others. The pole is located at 17Â° 56' 20.3" N and 66Â° 45' 26.7" W. Station 19 is located in the Bay surrounded by sea grass beds (Thallasia testudinum). The tidal range varies from 12 in. to 14 in. in the vicinity of the monitoring station. No fresh water input in the vicinity of the station is probable. The salinity at the vicinity of the monitoring station is approximately 35 ppt. The average depth at this station is 2-3m. The pole is located at 17Â° 56' 28.15885" N and 66Â° 13' 45.28784" W. Station 20 is located near Cayos Caribe islets. The sonde is in contact with three streams of water that comes from Cayos Caribe reef platform. The tidal range varies from 12 in. to 14 in. in the vicinity of the monitoring station. No fresh water input in the vicinity of the station is probable. The salinity at the vicinity of the monitoring station is approximately 35 ppt. The average depth at this station is 2-3m. The pole is located at 17Â° 55' 49.14258" N and 66Â° 12' 41.29771" W.
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Data Set Citation
Dataset Originator/Creator: NOAA Central Interface Data Processing Segment (IDPS)
Dataset Title: Cross-track Infrared Sounder
Dataset Release Date: Unpublished material
Dataset Release Place: Silver Spring, MD
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SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED RADIANCE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON MONOXIDE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > METHANE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS > OZONE
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