When we think of pollution in our rivers, lakes, or oceans, we often picture oil slicks or floating plastic bottles. But suspended sediment is an important agent that must not be overlooked. Suspended sediment can act like a vehicle for pollutants, carrying them far from their original source. Many pollutants—especially...
YANG Tianwei, LIN Jun, JIAO Junpeng, WU Yue (2025): Integrated Analysis of Phytoplankton Community Characteristics in Mussel Aquaculture Areas Using Net Sampling with Microscopy and Holographic Particle Imaging. Journal of Tropical Oceanography, in press. https://www.jto.ac.cn/EN/10.11978/2025051 The...
Primary Producers are the organisms that in general convert inorganic materials (e.g., phosphate) into organic matter (e.g. lipids) through photosynthesis. In the aquatic realm, the dominant primary producers are the phytoplankton[1]. Primary Production relates to the amount of organic matter the Primary...
Sequoia’s LISST-200X enjoys popularity amongst microplastics researchers. The instrument has been used to analyze microplastic particle distributions from disposable masks[i] , investigate interactions between oil droplets and microplastics[ii],[iii],[iv] and measure microparticles from biodegradable...
Sequoia’s LISST-Portable|XR is widely used to analyze suspended sediment concentration (SSC) and particle size distribution (PSD) in various aquatic environments. It has been employed in laboratory and field studies, sedimentology, geomorphology, water quality studies, and hydropower and oil &...
Sequoia’s LISST-Portable|XR laser diffraction particle size analyzer has significantly advanced research in hydropower and sediment management by providing precise measurements of suspended sediment concentration (SSC) and particle size distribution (PSD) in various environments. It has been instrumental...
The articles discuss the use of Sequoia’s LISST-VSF instrument, a submersible multi-angle polarized light scattering meter measuring the volume scattering function (VSF) in situ. Commercially available since 2012, the LISST-VSF’s capabilities have been demonstrated in extreme environments, such as...
Sequoia’s Laser In Situ Scattering and Transmissometry (LISST) particle size analyzers have significantly advanced the understanding of flocculation in aquatic environments. Since the mid-1990s, LISSTs have often replaced or supplemented older technologies with in-situ and real-time measurements of...
In 2019 Sequoia published a short note on our website regarding the feasibility of measuring plastic particles in situ. Two main conclusions were drawn: If one considers the number concentration of plastic particles (α), and the sampling volume (SV) of any instrument used for measuring plastic particles,...
The University of Hawai’i at Manoa (UH) operates the Hyper-bb hyperspectral backscatter instrument. Professor Angelicque White uses the instrument as a component of the open ocean Hawai’i Ocean Time-series (HOT) program to collect key datasets related to calibration and validation of scattering...