Recent Submissions

  • Hydrographic, biological, and nutrient characteristics of the water column on the Louisiana shelf during 1988

    Rabalais, Nancy N.; Turner, R. Eugene; Wiseman, William J., Jr.; Boesch, Donald F. (Louisiana Universities Marine ConsortiumChauvin, LA, 1989-03)
    Since 1985, several research cruises were conducted by our research team to assess the spatial and temporal extent, intensity, and potential causes of oxygen depletion in the northern Gulf of Mexico. Hypoxic bottom waters were studied along two transects in and near the Mississippi River Delta Bight in 1985 and 1986. In addition, shelf-wide cruises were conducted from the Mississippi River to the Texas border during July of 1985, 1986, and 1987. These cruises have provided us with exhaustive information concerning the temporal and spatial variability associated with the phenomenon of hypoxia on the Louisiana shelf. It was not our intent to continue assessment-type cruises during 1988. Opportunities existed, however, in conjunction with other research cruises and the LUMCON summer program to re-occupy stations along Transect C off Cat Island Pass near Cocodrie. In addition, the drought conditions in the upper Mississippi River basin during the spring and summer of 1988 resulted in a significant reduction in the flow rate of the Mississippi River. We were therefore compelled to conduct a shelf-wide cruise during mid-summer of 1988 to document the hydrographic conditions of the Louisiana shelf under low flow conditions of the Mississippi River and to assess the effects of this low flow on the phenomenon of hypoxia.The cruises along Transect C were conducted on board the R/V Pelican as part of a research effort named LaSER for data in April and as part of the LUMCON summer program for the remainder. The shelf-wide cruise was conducted on board the R/V Acadiana from August 12 through August 16, 1988.
  • Hydrographic, biological, and nutrient characteristics of the water column on the Louisiana shelf, July, 1987

    Rabalais, Nancy N.; Turner, R. Eugene; Wiseman, William J., Jr.; Boesch, Donald F. (Louisiana Universities Marine ConsortiumChauvin, LA, 1989-03)
    Beginning in 1985, several research cruises were conducted by our research team to assess the spatial and temporal extent, intensity, and potential causes of oxygen depletion in the northern Gulf of Mexico. Hypoxic bottom waters were studied along two transects in and near the Mississippi River Delta Bight in 1985 and 1986. In addition, shelf-wide cruises were conducted from the Mississippi River to the Texas border during July of both years. The intent of these cruises was to provide comparative information on the temporal variability of oxygen-depleted bottom waters on the Louisiana shelf.The bi-weekly cruises along the southeastern Louisiana shelf were discontinued in 1987. A shelf-wide cruise, however, was conducted in July, 1987 to continue the studies of temporal variability on the Louisiana shelf. The cruise was conducted on the R/V Pelican from July 1 through July 5.
  • LaSER oceanography: Data report number 1, R/V Pelican cruise, July 21-August 1, 1987, CTD and hydrographic data

    Murrell, Michael C.; Dagg, Michael J. (Louisiana Universities Marine ConsortiumChauvin, LA, 1987-12)
    The LaSER oceanography program is a five year multi-institutional and multi-investigator program titled "Oceanographic Processes on Continental Shelves Influenced by Large Rivers." Funding for this program began in January, 1987.The scientific goals of this program are: a) investigations on a large spatial scale, from the Mississippi River delta to some far field (down-plume) location, to examine biological responses to riverine inputs of dissolved nutrients, suspended sediments, and fresh water; b) investigations on small spatial scales, both horizontally and vertically, in a cross plume direction to examine the role of oceanographic fronts, convergences, and discontinuities in biological production; and c) investigations on small temporal scales, particularly to examine the biological responses to the passage of winter storms.This report summarizes the CTD and hydrographic (bottle) data from the first LaSER oceanography cruise.
  • LaSER oceanography: Data report number 2, R/V Pelican cruise, April 16-24, 1988, CTD, hydrographic, and light data

    Murrell, Michael C.; Dagg, Michael J. (Louisiana Universities Marine ConsortiumChauvin, LA, 1988-09)
    The LaSER oceanography program is a five year multi-institutional and multi-investigator program titled "Oceanographic Processes on Continental Shelves Influenced by Large Rivers." Funding for this program began in January, 1987.The scientific goals of this program are: a) investigations on a large spatial scale, from the Mississippi River delta to some far field (down-plume) location, to examine biological responses to riverine inputs of dissolved nutrients, suspended sediments, and fresh water; b) investigations on small spatial scales, both horizontally and vertically, in a cross plume direction to examine the role of oceanographic fronts, convergences, and discontinuities in biological production; and c) investigations on small temporal scales, particularly to examine the biological responses to the passage of winter storms.This report summarizes the CTD, hydrographic, and light data from the second LaSER oceanography cruise.
  • Hydrographic, biological, and nutrient characteristics of the water column on the southeastern Louisiana coast, January, 1986 to November, 1986

    Rabalais, Nancy N.; Turner, R. Eugene; Wiseman, William J., Jr.; Boesch, Donald F. (Louisiana Universities Marine ConsortiumChauvin, LA, 1989-03)
    In June 1985, a focused study was initiated to assess the spatial and temporal extent, intensity, and potential causes of oxygen depletion in the northern Gulf of Mexico. Hypoxic bottom waters were studied along two transects (one off Cat Island Pass near Cocodrie and one off Belle Pass near Port Fourchon). The number of transects was reduced to one in 1986 (Transect C off Cat Island Pass) and the number of sample periods increased. Sixteen cruises were conducted aboard the R/V Acadiana or the R/V Pelican between late January and mid-November, 1986. Sampling was most intense (bi-weekly) from mid-April through late September. A reduced sampling scheme (four stations) was followed for the first two cruises. In addition a shelf-wide cruise was conducted from the Mississippi River to the Texas border during July, 1986.
  • Hydrographic, biological, and nutrient characteristics of the water column on the Louisiana shelf, July, 1986

    Rabalais, Nancy N.; Turner, R. Eugene; Wiseman, William J., Jr.; Boesch, Donald F. (Louisiana Universities Marine ConsortiumChauvin, LA, 1989-03)
    In June 1985, a focused study was initiated to assess the spatial and temporal extent, intensity, and potential causes of oxygen depletion in the northern Gulf of Mexico. Hypoxic bottom waters were studied along two transects (one off Cat Island Pass near Cocodrie and one off Belle Pass near Port Fourchon). These cruises were continued in 1986 but on a single transect (see LUMCON Data Report No. 6). In addition, a shelf-wide cruise was conducted from the Mississippi River to the Texas border during July, 1986. Stations occupied during this cruise were similar to those sampled during shelf-wide cruises in 1985. The intent of these cruises was to provide comparative information on the temporal variability of oxygen-depleted bottom waters on the Louisiana shelf.The first part of the cruise was conducted on the R/V Acadiana between July 7 and July 10. Rough seas prevented continuation on the smaller ship. The remaining stations were sampled from on board the R/V Pelican between July 16 and July 17. While not synoptic in coverage, a few mid-depth stations were reoccupied during the second leg and hydrographic conditions were similar on the two dates.
  • Hydrographic, biological, and nutrient characteristics of the water column on the Louisiana shelf, July and September, 1985

    Rabalais, Nancy N.; Turner, R. Eugene; Wiseman, William J., Jr.; Boesch, Donald F. (Louisiana Universities Marine ConsortiumChauvin, LA, 1986-07)
    In June 1985, a focused study was initiated to assess the spatial and temporal extent, intensity, and potential causes of oxygen depletion in the northern Gulf of Mexico. Two shelf-wide, quasi-synoptic cruises were conducted from the Mississippi River to the Texas border during mid-July and early September, 1985. Cruises were conducted aboard the R/V Pelican on 15-20 July and 10-13 September. Stations were occupied along ten transects in 5 to 80 m water depth. Stations for Pelican Cruise I extended farther offshore and farther to the west than those for Pelican Cruise II. In addition to these shelf-wide cruises, hypoxic bottom waters were studied more frequently along two transects in the Mississippi River Delta Bight area.
  • Temperature, salinity, chlorophyll, and nutrient concentrations in Terrebonne Bay, Louisiana from October 1982 to October 1983

    Dagg, Michael (Louisiana Universities Marine ConsortiumChauvin, LA, 1984)
    Coastal and inshore continental shelf waters of Louisiana are influenced by marsh run-off, the Mississippi River, and the open Gulf of Mexico. The interactions between freshwater run-off and oceanographic processes, coupled with meteorological conditions that vary widely over short periods as well as seasonally, result in a complex hydrography and therefore in a complex biological system. As the preliminary portion of a long-term program designed to analyze and understand these processes, a survey of basic hydrographic, chemical, and biological parameters was made at monthly intervals over a 1 year period from October 1982 to October 1983. Nine stations were occupied, transecting Terrebonne Bay and extending into the Gulf of Mexico. The purpose of this report is to present the data from this survey.
  • Hydrographic, biological, and nutrient characteristics of the water column in the Mississippi River Delta Bight, June, 1985 to December, 1985

    Rabalais, Nancy N.; Turner, R. Eugene; Wiseman, William J., Jr.; Boesch, Donald F. (Louisiana Universities Marine ConsortiumChauvin, LA, 1986-07)
    In June 1985, a focused study was initiated to assess the spatial and temporal extent, intensity, and potential causes of oxygen depletion in the northern Gulf of Mexico. Hypoxic bottom waters were studied along two transects (one off Cat Island Pass near Cocodrie and one off Belle Pass off Port Fourchon) in the Mississippi River Delta Bight area. Eight 2-day cruises were conducted aboard the R/V R.J. Russell or the R/V Pelican along these two transects between mid-June and mid-October. Sampling was most intense (bi-weekly) from mid-June through early September. A reduced sampling scheme (4 stations along the Cat Island Pass transect) was continued through the end of the year. In addition, two shelf-wide cruises were conducted from the Mississippi River to the Texas border during July and September.
  • Techniques for the transport and maintenance of scleractinian coral

    Bassim, Khaled M. (Louisiana Universities Marine ConsortiumChauvin, LA, 1997)
    Several small scleractinian coral colonies were collected from a remote reef and transferred [to] the Louisiana Universities Marine Center (LUMCON) for in vitro reproductive and larval studies. The species used here were Porites astreoides and Diploria strigosa. Colony size was ~20 cm in diameter. Colonies were brought to the surface by liftbag and stored in modified ice coolers. They were transported from Freeport, TX to Cocodrie, LA by truck for nearly 15 hours where field conditions were simulated in waiting aquaria. This document describes the techniques and equipment that were used, how to outfit such aquaria, proper handling techniques for coral colonies, and several eventualities that the mariculturist should be prepared for in undertaking this endeavor. It will hopefully prevent many mistakes from being made.
  • Effects of natural gas pipeline condensate and crude oil spills, and comments on remediation, with emphasis on south Louisiana salt marshes: a review

    Sammarco, Paul W. (Louisiana Universities Marine ConsortiumChauvin, LA, 1997-04-04)
    This report reviews some of the natural ecological processes at work within a salt marsh as they relate to a spill of natural gas condensate - a mixture of aliphatic hydrocarbons, n-hexane, benzene, toluene, and xylene. It also reviews the environmental impacts of some of the components of natural gas condensate as well as related compounds (crude oil, higher molecular weight hydrocarbons, polycyclic aromatic hydrocarons - PAHs, linear alkyl-benzenes - LABs, etc.) on salt marsh ecosystems in southern Louisiana and elsewhere in the world. The behavior and persistence of these compounds once they have entered the environment is also considered.
  • Nutrient Enhanced Coastal Ocean Productivity (NECOP). Data report: CTD and hydrographic data, R/V Pelican cruise, April 3-11, 1993

    Toon, R.; Dagg, M. (Louisiana Universities Marine ConsortiumChauvin, LA, 1993-08)
    The Nutrient Enhanced Coastal Ocean Productivity (NECOP) Program is a component of NOAA's Coastal Ocean Program. The central hypothesis of this research is: Anthropogenic nutrient inputs have enhanced coastal ocean productivity with subsequent impacts on coastal ocean water quality, living resource yields, and the global marine carbon cycle. The initial study area for this program is the Mississippi/Atchafalaya River Outflow and adjacent Louisiana shelf region.