Human impacts on deep-sea sponge grounds: Applying environmental omics to monitoring

Johanne Vad*, Kelsey Archer Barnhill, Georgios Kazanidis, J. Murray Roberts

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract / Description of output

Sponges (Phylum Porifera) are the oldest extant Metazoans. In the deep sea, sponges can occur at high densities forming habitats known as sponge grounds. Sponge grounds can extend over large areas of up to hundreds of km2 and are biodiversity hotspots. However, as human activities, including deep-water hydrocarbon extraction, continue to expand into areas harbouring sponge grounds, understanding how anthropogenic impacts affect sponges and the ecosystem services they provide at multiple biological scales (community, individual and (sub)cellular levels) is key for achieving sustainable management. This chapter (1) provides an update to the chapter of Advances in Marine Biology Volume 79 entitled “Potential Impacts of Offshore Oil and Gas Activities on Deep-Sea Sponges and the Habitats They Form” and (2) discusses the use of omics as a future tool for deep-sea ecosystem monitoring. While metagenomics and (meta)transcriptomics studies have contributed to improve our understanding of sponge biology in recent years, metabolomics analysis has mostly been used to identify natural products. The sponge metabolome, therefore, remains vastly unknown despite the fact that the metabolome is a key link between the genotype and phenotype, giving us a unique new insight to how key components of an ecosystem are functioning. As the fraction of the metabolome released into the seawater, the sponge exometabolome has only just started to be characterised in comparative environmental metabolomic studies. Yet, the sponge exometabolome constitute a unique opportunity for the identification of biomarkers of sponge health as compounds can be measured in seawater, bypassing the need for physical samples which can still be difficult to collect in the deep sea. Within sponge grounds, the characterisation of a shared sponge exometabolome could lead to the identification of biomarkers of ecosystem functioning and overall health. Challenges remain in establishing omics approaches in environmental monitoring but constant technological advances and reduction in costs means these techniques will become widely available in the future.

Original languageEnglish
Title of host publicationAdvances in Marine Biology
EditorsCharles Sheppard
PublisherSussex Academic Press
Pages53-78
Number of pages26
ISBN (Print)9780128246238
DOIs
Publication statusPublished - Jan 2021

Publication series

NameAdvances in Marine Biology
Volume89
ISSN (Print)0065-2881
ISSN (Electronic)2162-5875

Keywords / Materials (for Non-textual outputs)

  • Deep-sea sponges
  • Exometabolites
  • Metabolomics
  • Monitoring
  • Oil and gas
  • Omics
  • Sponge grounds

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