Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Marine pollution bulletin, 2024-05, Vol.202, p.116323-116323, Article 116323

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2024

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• 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. •Deep-sea organisms are vulnerable to change.•The deep-sea bivalve Acesta excavata is affected by warming and sediment pollution.•Sediment and warming increase A. excavata reliance on protein for energy.•Sediment caused A. excavata to produce more organic carbon.•A. excavata is limited in its capacity to respond to warming and sediment pollution.