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Article
Acute and Sub-Acute Toxicity of the Polycyclic Aromatic Hydrocarbon 1-Methylnaphthalene to the Shallow-Water Coral Porites divaricata: Application of a Novel Exposure Protocol
Environmental Toxicology and Chemistry
  • Dorothy-Ellen A. Renegar, Nova Southeastern University
  • Nick Turner, Nova Southeastern University
  • Bernhard Riegl, Nova Southeastern University
  • Richard E. Dodge, Nova Southeastern University
  • Anthony H. Knap, Texas A&M University
  • Paul Schuler, Nova Southeastern University
Document Type
Article
Publication Date
1-1-2017
Keywords
  • Corals,
  • Marine toxicity tests,
  • Polycyclic aromatic hydrocarbons (PAHs),
  • 1-methylnaphthalen,
  • Passive dosing
Abstract
Previous research evaluating hydrocarbon toxicity to corals and coral reefs has generally focused on community-level effects, and results often are not comparable between studies because of variability in hydrocarbon exposure characterization and evaluation of coral health and mortality during exposure. Toxicity of the polycyclic aromatic hydrocarbon 1-methylnaphthalene to the coral Porites divaricata was assessed in a constant exposure toxicity test utilizing a novel toxicity testing protocol uniquely applicable to shallow-water corals, which considered multiple assessment metrics and evaluated the potential for post-exposure mortality and/or recovery. Acute and subacute effects (gross morphological changes, photosynthetic efficiency, mortality, and histologic cellular changes) were evaluated during pre-exposure (4 wk), exposure (48 h), and post-exposure recovery (4 wk) periods. Coral condition scores were used to determine a 48-h median effective concentration of 7442 μg/L. Significant physical and histological changes resulted from exposure to 640 μg/L and 5427 μg/L 1-methylnaphthalene, with a 1-d to 3-d delay in photosynthetic efficiency effects (ΔF/Fm). Pigmented granular amoebocyte area was found to be a potentially useful sublethal endpoint for this species. Coral mortality was used to estimate a 48-h median lethal concentration of 12 123 μg/L.
Comments

©2016 SETAC

ORCID ID
0000-0003-1330-1278; 0000-0002-6003-9324
ResearcherID
F-8807-2011
DOI
10.1002/etc.3530
Citation Information
Dorothy-Ellen A. Renegar, Nick Turner, Bernhard Riegl, Richard E. Dodge, et al.. "Acute and Sub-Acute Toxicity of the Polycyclic Aromatic Hydrocarbon 1-Methylnaphthalene to the Shallow-Water Coral Porites divaricata: Application of a Novel Exposure Protocol" Environmental Toxicology and Chemistry Vol. 36 Iss. 1 (2017) p. 212 - 219 ISSN: 0730-7268
Available at: http://works.bepress.com/bernhard-riegl/15/