Jobos Bay NERR Nutrient Metadata January 2004 to December 2004 Latest Update: May 16, 2004Entry ID: CDMO_jobnut01-12.04m
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 deep 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 6600 data loggers started in December, 1995 to determine pH, salinity, turbidity, temperature, specific conductance, depth, dissolved oxygen saturation and concentration. The study "Assessment of nitrate contamination in the Salinas area, Puerto Rico" started at 2001 by the US Geological survey had the objetive of define potential sources of nitrogen and estimate the loads from the major sources , which have led to an increase in nitrate concentrations in the South Coastal Plain Aquifer. They found that nitrate concentration increased, compared to the results obtained in March 2002 in the mayority of the wells sampled. In nitrogen stable isotope analysis they found values of Â§15N that fall between 3 and 10 per mil, indicative of mixed inorganic and organic sources or soil organic source. We are still waiting for the final report. A new study started during 2004 “Inventory of source of pollution of groundwater at las Mareas Community, Salinas Puero Rico". The main objetive of this study it's to identify sources of groundwater pollution and environmental health implications using georefereced data on th preatic level, geohydrology, water quality and location of known drinking water wells. This community it's located at the vicinity of Jobos Bay NERR specifically in the coast line and have a direct impact on our water resouces.
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 (09) 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 (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 (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 pole is located at 17Â° 56' 28.15885" N and 66Â° 13' 45.28784" W. Station 20 (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 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: Iris Tirado, Luis A. Encarnac, Enid Malav, Carol Pollard
Dataset Title: Jobos Bay NERR Nutrient Metadata January 2004 to December 2004 Latest Update: May 16, 2004
Dataset Release Date: 2006-02-23
Data Presentation Form: Unknown
Other Citation Details: NAOnline Resource: http://cdmo.baruch.sc.edu/
This data set description is a member of a collection. The collection is described in
Start Date: 2004-01-01Stop Date: 2004-12-31
ISO Topic Category
Use Constraints PICCCBY
Email: yamagisi at nipr.ac.jp
Province or State: Tokyo
Postal Code: 190-8518
Creation and Review Dates
DIF Creation Date: 2008-03-12
Last DIF Revision Date: 2012-03-30