Holocene ecosystem shifts and human-induced loss of Arca and Ostrea shell beds in the north-eastern Adriatic Sea
- Author(s)
- Anna-Katharina Mautner, Ivo Gallmetzer, Alexandra Haselmair, Sara-Maria Schnedl, Adam Tomasovych, Martin Zuschin
- Abstract
The molluscan assemblages in a sediment core from the north-eastern Adriatic show significant compositional changes over the past 10,000 yrs related to (1) natural deepening driven by the post-glacial sea-level rise, (2) increasing abundance of skeletal sand and gravel, and (3) anthropogenic impacts. The transgressive phase (10,000-6000 BP) is characterized by strongly time-averaged communities dominated by infaunal bivalves. During the early highstand (6000-4000 BP), the abundance of epifaunal filter feeders and grazers increases, and gastropods become more important. Epifaunal dominance culminates during the late highstand (4000-2000 BP) with the development of extensive shell beds formed by large-sized Arca noae and Ostrea sp. bivalves. This community persists until the early 20th century, when it falls victim to multiple anthropogenic impacts, mainly bottom trawling, and is substituted by an infauna-dominated community indicative of instability, disturbance and organic enrichment. The re-establishment of this unique shell-bed ecosystem can be a goal for restoration efforts.
- Organisation(s)
- Department of Palaeontology
- External organisation(s)
- Slovak Academy of Sciences (SAS)
- Journal
- Marine Pollution Bulletin
- Volume
- 126
- Pages
- 19-30
- No. of pages
- 12
- ISSN
- 0025-326X
- DOI
- https://doi.org/10.1016/j.marpolbul.2017.10.084
- Publication date
- 01-2018
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105118 Palaeontology
- Keywords
- ASJC Scopus subject areas
- Pollution, Aquatic Science, Oceanography
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/e83d9b27-eaa0-4f4c-8eb6-f79b3ef230dd