A cross-taxa study using environmental DNA/RNA metabarcoding to measure biological impacts of offshore oil and gas drilling and production operations.

Citation data:

Marine pollution bulletin, ISSN: 1879-3363, Vol: 127, Page: 97-107

Publication Year:
2018
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Repository URL:
http://hdl.handle.net/10754/626658
PMID:
29475721
DOI:
10.1016/j.marpolbul.2017.11.042
Author(s):
Laroche, Olivier; Wood, Susanna A; Tremblay, Louis A; Ellis, Joanne I; Lear, Gavin; Pochon, Xavier
Publisher(s):
Elsevier BV
Tags:
Earth and Planetary Sciences; Agricultural and Biological Sciences; Environmental Science; Biomonitoring; Benthic ecology; High-throughput sequencing; Bacteria 16S; Eukaryotes 18S; Foraminifera 18S
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article description
Standardized ecosystem-based monitoring surveys are critical for providing information on marine ecosystem health. Environmental DNA/RNA (eDNA/eRNA) metabarcoding may facilitate such surveys by quickly and effectively characterizing multi-trophic levels. In this study, we assessed the suitability of eDNA/eRNA metabarcoding to evaluate changes in benthic assemblages of bacteria, Foraminifera and other eukaryotes along transects at three offshore oil and gas (O&G) drilling and production sites, and compared these to morphologically characterized macro-faunal assemblages. Bacterial communities were the most responsive to O&G activities, followed by Foraminifera, and macro-fauna (the latter assessed by morphology). The molecular approach enabled detection of hydrocarbon degrading taxa such as the bacteria Alcanivorax and Microbulbifer at petroleum impacted stations. Most identified indicator taxa, notably among macro-fauna, were highly specific to site conditions. Based on our results we suggest that eDNA/eRNA metabarcoding can be used as a stand-alone method for biodiversity assessment or as a complement to morphology-based monitoring approaches.