The long-lived deep-sea bivalve Acesta excavata is sensitive to the dual stressors of sediment and warming

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Elliot Scanes
  • Tina Kutti
  • James K.H. Fang
  • Emma L. Johnston
  • Pauline M. Ross
  • And 1 others
  • Raymond J. Bannister

Detail(s)

Original languageEnglish
Article number116323
Journal / PublicationMarine Pollution Bulletin
Volume202
Online published10 Apr 2024
Publication statusPublished - May 2024

Link(s)

Abstract

Human influence in the deep-sea is increasing as mining and drilling operations expand, and waters warm because of climate change. Here, we investigate how the long-lived deep-sea bivalve, Acesta excavata responds to sediment pollution and/or acute elevated temperatures. A. excavata were exposed to suspended sediment, acute warming, and a combination of the two treatments for 40 days. We measured O2 consumption, NH4+ release, Total Organic Carbon (TOC), and lysosomal membrane stability (LMS). We found suspended sediment and warming interacted to decrease O:N ratios, while sediment as a single stressor increased the release of TOC and warming increased NH4+ release in A. excavata. Warming also increased levels of LMS. We found A. excavata used protein catabolism to meet elevated energetic demands indicating a low tolerance to stress. A. excavata has limited capacity for physiological responses to the stressors of warming and sediment which may lead to decreased fitness of A. excavata. © 2024 The Author(s).

Citation Format(s)

The long-lived deep-sea bivalve Acesta excavata is sensitive to the dual stressors of sediment and warming. / Scanes, Elliot; Kutti, Tina; Fang, James K.H. et al.
In: Marine Pollution Bulletin, Vol. 202, 116323, 05.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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