Dataset Authors

Paul Montagna
Melissa Rohal


This dataset contains benthic infauna data from sediment cores collected aboard R/V Justo Sierra cruise JS-0815 in the southern Gulf of Mexico from 2015-08-03 to 2015-08-06. Samples were collected with multiple corers from 7 stations around the original Ixtoc-1 wellhead. Organisms were identified taxonomically, and their abundance was determined. Taxonomic richness, diversity, and evenness were calculated. The samples were analyzed to test for differences between stations and to estimate the recovery rate of the benthic community after an oil spill. Organisms were identified taxonomically. The dataset contains the location, date and hydrographic conditions at the sampling collection site; average meiofauna and macrofauna taxa abundance per replicate-section; and calculations for infauna abundance, diversity, richness and evenness. The total concentration of polycyclic aromatic hydrocarbon (PAHs) for the core sections and cores was included. Additional information about the hydrocarbon concentration in these sediment cores can be found under GRIIDC Unique Dataset Identifier (UDI) R4.x267.179:0024. The complete hydrographic dataset related to these sediment cores can be found under GRIIDC UDI R4.x267.179:0019. The cruise documentation was provided for the R/V Justo Sierra cruise JS-0815. The cruise was led by chief scientists Dr. David Hollander and Dr. Patrick Schwing.


Supplemental Information

Station Name, latitude (decimal degrees), longitude (decimal degrees), core collection depth (m), sampling date (dd-mm-yyyy), CTD depth (m), dissolved oxygen (DO, mg/L), temperature (degrees C), salinity (psu), station name, sediment core section depth (section, cm), section id (sec), replicate number (Rep), total PAH (ng/g), macrofauna abundance (Mac_nm2, n/m^2), macrofauna richness (Mac_S, n of taxa/sample), macrofauna diversity (Mac_Hprime, Shannon H'), macrofauna diversity (Mac_N1, Hill's N1), macrofauna evenness (Mac_Jprime, Pielou J'), meiofauna abundance (Mei_nm2, n/m^2), meiofauna richness (Mei_S, n of taxa/sample), meiofauna diversity (Mei_Hprime, Shannon H'), Meiofauna Diversity (Mei_N1, Hill's N1), Meiofauna Evenness (Mei_Jprime, Pielou J'), Total number of all Copepoda (n/m²), Total number of all Nematoda (n/m²), Total number of all Dorvilleidae (n/m²), Nematode / Copepod ratio (unitless), meiofauna and macrofaunal taxa abundance (n/m²). Please see the metadata sheet inside the dataset to find all the information regarding the taxa.|||||


The goal of this cruise was to characterize the distribution and fate of oiled sediment at sites on the continental shelf and slope of the southern Gulf of Mexico with reference to the Ixtoc blowout (1979-1980).


Meiofauna, Macrofauna, Ixtoc, Oil Spill, abundance, diversity, richness, evenness, water column temperature, water column salinity, dissolved oxygen, polycyclic aromatic hydrocarbon (PAH), infauna, sediment cores




April 2019

Point of Contact


Paul A. Montagna


Texas A&M University-Corpus Christi / The Harte Research Institute for Gulf of Mexico Studies


Melissa Rohal Lupher


Texas Water Development Board

Funding Source




Rights Information

Creative Commons License
This work is licensed under a Creative Commons Public Domain Dedication 1.0 License.