Related Experiment Video
Updated: Jun 23, 2026

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles
Published on: April 19, 2018
Physical and topographic factors affecting suspended particulate matter composition in a shallow tropical estuary
Yu Umezawa1, Teruhisa Komatsu, Masumi Yamamuro
1Faculty of Fisheries, Nagasaki University, 1-14 Bunkyo, Nagasaki-city, Nagasaki 852-8521, Japan. umezawa@nagasaki-u.ac.jp
Abstract:
To better understand topography-dependent characteristics of suspended particulate matter (SPM) in a tropical shallow estuary during dry season, the physical factors causing an increase in SPM and the sources of SPM were investigated at the western coast of Thailand. Single and multiple regression analyses using physical parameters as independent variables indicated that periodic tidal current-driven resuspension, episodic wind-driven resuspension, and river-borne inputs were the most important factors controlling SPM increases in areas surrounded by sand bars, areas directly facing the ocean, and areas close to the river mouth, respectively. The assessment of the origin of increased SPM over the background levels estimated from the chemical signatures (delta(13)C and C/N ratio) at all investigated locations and for each event responsible for an increase in SPM confirmed the results of the multiple regression analyses. The results suggested that specific characteristics of SPM at each location were highly contributed by sedimentary materials and could be rather consistent through the season under similar weather conditions.
Related Concept Videos
Marine Microbial Ecology
Freshwater Microbial Ecology
Deep Sea Microbial Ecology
Microenvironments
Primary Production
Precipitate Formation and Particle Size Control
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...

