Climate change will upset vital ocean chemical cycles
New research reveals that rising ocean temperatures will alter natural cycles of carbon dioxide, nitrogen and phosphorous. Rising temperatures will have a direct impact on plankton, the organism responsible for removing half of all carbon dioxide from the atmosphere. Changes to the plankton ecosystem will not be limited to the carbon dioxide cycle, they will also alter the phosphorous and nitrogen cycles.
High-tech fish surveillance
Researchers are using high-resolution sonar equipment to monitor fish swimming in and out of Narrabeen Lagoon on Sydney’s northern beaches. The system can detect individual fish longer than 10 centimeters or groups of smaller fish. By monitoring fish movements, researchers hope to determine the level of connection between the coastal ecosystem and fish habitat in the estuary.
Newly discovered tiger shark migration pattern might explain attacks near Hawaii
Using new techniques, researchers analyzed the movements of tiger sharks in the Hawaiian archipelago where there have been multiple shark-human incidents. This seven-year study focused on shark migration patterns, not shark attacks, and found different patterns between males and females. Females moved more often to the main Hawaiian Islands during late summer and early fall, most likely to give birth, and this could provide insight into the recent attacks in that area.
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