Related Experiment Video
Updated: Aug 4, 2026

13:16
A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems
Published on: December 24, 2014
Beryllium-7 in ocean water
Summary
Cosmic ray-produced beryllium-7 was measured in Atlantic and Pacific ocean waters. This radio nuclide is an effective tracer for air-sea interactions and surface ocean mixing.
Area of Science:
- Oceanography
- Radiochemistry
- Environmental Science
Background:
- Beryllium-7 (⁷Be) is a cosmogenic radio nuclide.
- Its short half-life makes it suitable for studying dynamic oceanographic processes.
Purpose of the Study:
- To measure the concentration of beryllium-7 in the Atlantic and Pacific oceans.
- To assess the utility of beryllium-7 as a tracer for air-sea interface interactions and surface layer mixing.
Main Methods:
- Collection of water samples from the Atlantic and Pacific oceans.
- Measurement of beryllium-7 concentrations in the collected samples.
Main Results:
- Beryllium-7 was detected in ocean waters.
- The distribution and concentration provide insights into mixing processes.
Conclusions:
- Beryllium-7 serves as a valuable tracer for rapid mixing in the ocean's surface layer.
- It effectively tracks interactions occurring at the air-sea interface.
Related Concept Videos
Bacterial Signaling
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
Bacterial Phylum Proteobacteria
Proteobacteria, one of the largest and most diverse bacterial phyla, encompasses a wide range of Gram-negative bacteria distinguished by their outer membrane composed of lipopolysaccharides. These microorganisms exhibit various metabolic capabilities, including phototrophy, chemolithotrophy, and heterotrophy, and thrive in diverse environments from soil to aquatic systems and host-associated niches. The phylum is divided into six classes: Alphaproteobacteria, Betaproteobacteria,...
Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
iChip
The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...
Cholera
Cholera is an acute gastrointestinal disease caused by the Gram-negative bacterium Vibrio cholerae. It is transmitted primarily via the fecal-oral route through the ingestion of contaminated water or food.Vibrio cholerae is a motile, Gram-negative bacterium of the family Vibrionaceae, primarily associated with waterborne outbreaks in areas with inadequate sanitation. Although over 200 serogroups of V. cholerae exist, only O1 and O139 are responsible for epidemic cholera. The O1 serogroup,...

