nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (1): toevoegen | toon Print deze pagina

one publication added to basket [322655]
Dredging-induced turbid plumes affect bio-irrigation and biogeochemistry in sediments inhabited by Lanice conchilega (Pallas, 1766)
Mestdagh, S.; Ysebaert, T.; Moens, T.; Van Colen, C. (2020). Dredging-induced turbid plumes affect bio-irrigation and biogeochemistry in sediments inhabited by Lanice conchilega (Pallas, 1766). ICES J. Mar. Sci./J. Cons. int. Explor. Mer 77(3): 1219-1226. https://dx.doi.org/10.1093/icesjms/fsy122
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoorden
    Chemistry > Geochemistry > Biogeochemistry
    Dredging
    Lanice conchilega (Pallas, 1766) [WoRMS]
    Marien/Kust
Author keywords
    bio-irrigation, SSC, suspension feeding

Auteurs  Top 

Abstract
    Building man-made structures in coastal seas are often preceded by dredging operations, inducing turbid plumes of suspended sediment. To study the effects of such high-concentration sediment plumes on the suspension-feeding polychaete Lanice conchilega, a laboratory experiment was performed, in which individuals of L. conchilega were exposed to natural seawater with a suspended sediment concentration (SSC) of ∼ 0.3 g l−1 and treatments with elevated SSC of 5 and 1 g l−1, representing concentrations in a dredging plume at the moment of sediment release and after initial dilution, respectively. We measured clearance rates of sediment particles, biogeochemical fluxes, and bio-irrigation. While clearance rates and nitrite efflux significantly increased in both treatments with elevated SSC compared with the control, bio-irrigation increased at 1 g l−1 but was lowest at 5 g l−1. It is suggested that piston pumping is intensified under intermediate concentrations to remove sediment, but ceases under high concentrations are due to sediment ingestion. By transporting oxygen into the sediment, bio-irrigation enhances aerobic microbial processes, among which nitrification. We conclude that short-term extreme suspended sediment concentrations can have a significant impact on the biogeochemistry of the seabed through changes in behaviour of L. conchilega.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ, voor meer informatie contacteer .