Coral geochemical response to uplift in the aftermath of the 2005 Nias-Simeulue earthquake.

ABSTRACT: On 28 March 2005, the Indonesian islands of Nias and Simeulue experienced a powerful M_w 8.6 earthquake and coseismic uplift and subsidence. In areas of coastal uplift (up to ~ 2.8 m), fringing reef coral communities were killed by exposure, while deeper corals that survived were subjected to habitats with altered runoff, sediment and nutrient regimes. Here we present time-series (2000-2009) of Mn/Ca, Y/Ca and Ba/Ca variability in massive Porites corals from Nias to assess the environmental impact of a wide range of vertical displacement (+ 2.5 m to - 0.4 m). High-resolution LA-ICP-MS measurements show that skeletal Mn/Ca increased at uplifted sites, regardless of reef type, indicating a post-earthquake increase in suspended sediment delivery. Transient and/or long-term increases

SUBMITTER: Sosdian SM 

PROVIDER: S-EPMC11018842 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature