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.
Data Set Citation
Dataset Originator/Creator: Carmen Gonz¡lez, Iris Tirado, Luis A. Encarnac, Enid Malava
Dataset Title: Jobos Bay NERR Nutrient Metadata January 2003 to December 2003 Latest Update: February 11, 2005
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: 2003-01-01Stop Date: 2003-12-31
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CHLOROPHYLL
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > PHOSPHOROUS COMPOUNDS
OCEANS > COASTAL PROCESSES > ESTUARIES
OCEANS > OCEAN CHEMISTRY > NITRATE
OCEANS > OCEAN CHEMISTRY > NITRITE
OCEANS > OCEAN CHEMISTRY > PHOSPHATE
BIOSPHERE > AQUATIC ECOSYSTEMS > ESTUARINE HABITAT
OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL
Quality ATTRIBUTE ACCURACY REPORT: Limits of Detection The VIMS Nutrient Analytical Laboratory has established Method Detection Limits (MDL), the lowest concentration of a parameter that an analytical procedure can reliably detect. The MDL is determined as 3 times the standard deviation of a minimum of 7 replicates of a single low concentration sample. Table 1 presents the current MDL’s; these values are ... reviewed and revised periodically. Table 1. Method Detection Limits (MDL) for measured water quality parameters. Parameter Variable Mean Conc. mg/L as N or P Std. Dev. MDL mg/L as N or P Dates in use Ammonium NH4 0.1634 0.1172 0.0015 Jan-May 2003 Ammonium NH4 0.1634 0.1172 0.0054 Jun-Dec 2003 Nitrate+Nitrite NO23 0.0039 0.0059 0.0008 Jan-May 2003 Nitrate+Nitrite NO23 0.0039 0.0059 0.0010 Jun-Dec 2003 Nitrite NO2 0.0045 0.0077 0.0002 Jan-Dec 2003 Orthophosphate PO4F 0.0228 0.0190 0.0006 Jan-May 2003 Orthophosphate PO4F 0.0228 0.0190 0.0015 Jun-Dec 2003 Chlorophyll CHLA 0.40 0.15 0.25 Jan-May 2003 Chlorophyll CHLA 0.40 0.15 0.5 Jun-Dec 2003 Pheophytin PHEA 0.40 0.16 0.25 Jan-May 2003 Pheophytin PHEA 0.40 0.16 0.5 Jun-Dec 2003 Reporting of Missing Data and Data with Concentrations Lower than Method Detection Limits Nutrient/Chla comment codes and definitions are provided in the following table. Missing data are denoted by a blank cell “ ” and commented coded with an “M”. Laboratories in the NERRS System submit data that are censored at a lower detection rate limit, called the Method Detection Limit or MDL. MDL’s for specific parameters are listed in the Laboratory Methods and Detection Limits Section (Section I, Part 12) of this document. Concentrations that are less than this limit are denoted by a –9999 and comment coded with a “B” in the variable code comment column. For example, the measured concentration of NO23F was 0.0005 mg/L as N (MDL=0.0008), the reported value would be -9999 with a “B” placed in the NO23F comment code column. Calculated parameters are comment coded with a “C” and if any of the components used in the calculation are below the MDL, the calculated variable is denoted by –9999 and also comment coded with a “B”. If a calculated value is negative, the value is reported as a -9999. Comment Code Definition A Value above upper limit of method detection B Value below method detection limit C Calculated value D Data deleted or calculated value could not be determined due to deleted data, see metadata for details H Sample held beyond specified holding time K Check metadata for further details M Data missing, sample never collected or calculated value could not be determined due to missing data P Significant precipitation (reserve defined, see metadata for further details) U Lab analysis from unpreserved sample S Data suspect, see metadata for further details QA/QC Programs Precision Field Variability Field replicates are collected using grab sampling method at an approximate depth of 30 cm. The technician takes two separate water samples at each sampling station this result in a total of eight samples. Laboratory Variability Duplicates Inter-organizational splits Accuracy Sample Spikes Standard Reference Material Analysis Cross Calibration Exercises LOGICAL CONSISTENCY REPORT: NACOMPLETENESS REPORT: Data collection period Station nine (9) sampling of nutrients began on January 21, 2003 Station ten (10) sampling of nutrients began on January 22, 2003 Station nineteen (19) sampling of nutrients began on January 22, 2003 Station twenty (20) sampling of nutrients began on January 22, 2003 Diel Sampling Station Start Date Start Time End Date End Time job09nut 1/21/2003 09:30 1/22/2003 07:30 job09nut 2/18/2003 09:30 2/19/2003 07:30 job09nut 3/18/2003 08:30 3/19/2003 06:30 job09nut 4/15/2003 09:30 4/16/2003 07:30 job09nut 5/14/2003 09:30 5/15/2003 07:30 job09nut 6/17/2003 08:30 6/18/2003 06:30 job09nut 7/30/2003 08:30 7/31/2003 06:30 job09nut 8/12/2003 09:30 8/13/2003 07:30 job09nut 9/9/2003 09:30 9/10/2003 07:30 job09nut 10/15/2003 09:30 10/16/2003 07:30 job09nut 11/24/2003 08:30 11/25/2003 08:30 job09nut 12/9/2003 08:30 12/10/2003 06:30 Grab Sampling Site Start Date Rep #1 Time Rep #2 Time S09 1/22/2003 8:15 8:15 S10 1/22/2003 8:00 8:00 S19 1/22/2003 7:30 7:30 S20 1/22/2003 8:45 8:45 S09 2/19/2003 9:11 9:11 S10 2/19/2003 8:52 8:52 S19 2/19/2003 8:33 8:33 S20 2/19/2003 9:30 9:30 S09 3/19/2003 9:28 9:28 S10 3/19/2003 9:54 9:54 S19 3/19/2003 9:05 9:05 S20 3/19/2003 10:53 10:53 S09 4/16/2003 10:12 10:12 S10 4/16/2003 9:34 9:34 S19 4/16/2003 8:49 8:49 S20 4/16/2003 8:12 8:12 S09 5/15/2003 8:49 8:49 S10 5/15/2003 8:25 8:25 S19 5/15/2003 8:04 8:04 S20 5/15/2003 9:31 9:31 S09 6/18/2003 9:24 9:24 S10 6/18/2003 8:51 8:51 S19 6/18/2003 8:15 8:15 S20 6/18/2003 9:44 9:44 S09 7/31/2003 8:55 8:55 S10 7/31/2003 8:39 8:39 S19 7/31/2003 8:11 8:11 S20 7/31/2003 8:18 8:18 S09 9/10/2003 8:19 8:19 S10 9/10/2003 8:34 8:34 S19 9/10/2003 7:56 7:56 S20 9/10/2003 9:16 9:16 S09 10/16/2003 8:03 8:03 S10 10/16/2003 8:37 8:37 S19 10/16/2003 7:41 7:41 S20 10/16/2003 9:15 9:15 S09 11/25/2003 8:55 8:55 S10 11/25/2003 8:30 8:30 S19 11/25/2003 8:03 8:03 S20 11/25/2003 9:17 9:17 S09 12/10/2003 8:33 8:33 S10 12/10/2003 8:13 8:13 S19 12/10/2003 7:48 7:48 S20 12/10/2003 9:02 9:02 LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: Additional Description: Entry verification After the results of nutrients sampling arrives from VIMS laboratory to Jobos Bay NERR the data was verified before being sent to the CDMO to be archived into the permanent database. The person responsible of this task is the Research Coordinator of the reserve Iris L. Tirado. PROCESS DATE: 20060223
Access Constraints Data collected in conjunction with the National Estuarine Research Reserve System's (NERRS) System-wide Monitoring Program (SWMP) is considered public information. Please see site for further information: http://cdmo.baruch.sc.edu/aboutdata.htm
DISTRIBUTION LIABILITY: Distribution NOAA/ERD retains the right to analyze, synthesize and publish summaries of the NERRS System-wide ... Monitoring Program data. The PI retains the right to be fully credited for having collected and processed the data. Following academic courtesy standards, the PI and NERR site where the data were collected will be contacted and fully acknowledged in any subsequent publications in which any part of the data are used. Manuscripts resulting from this NOAA/OCRM supported research that are produced for publication in open literature, including refereed scientific journals, will acknowledge that the research was conducted under an award from the Estuarine Reserves Division, Office of Ocean and Coastal Resource Management, National Ocean Service, National Oceanic and Atmospheric Administration. The data set enclosed within this package/transmission is only as good as the quality assurance and quality control procedures outlined by the enclosed metadata reporting statement. The user bears all responsibility for its subsequent use/misuse in any further analyses or comparisons. The Federal government does not assume liability to the Recipient or third persons, nor will the Federal government reimburse or indemnify the Recipient for its liability due to any losses resulting in any way from the use of this data. NERR water quality data and metadata can be obtained from the Research Coordinator at the individual NERR site (please see Section 1. Principal investigators and contact persons), from the Data Manager at the Centralized Data Management Office (please see personnel directory under the general information link on the CDMO home page) and online at the CDMO home page http://cdmo.baruch.sc.edu/. Data are available in text tab-delimited format, Microsoft Excel spreadsheet format and comma-delimited format.
Use Constraints The principal investigator (PI) listed in the enclosed metadata retains the right to be fully credited for having collected and processed the data. Please see the site for further information: http://cdmo.baruch.sc.edu/aboutdata.htm
Data Set Progress
Distribution Format: Ascii File, Formatted For Text Attributes, Declared Format (ASCII)NA
Fees: Data is available at no charge.
Creation and Review Dates
DIF Creation Date: 2006-02-24
Last DIF Revision Date: 2008-10-10