Ocean ecosystems changing due to shift in ocean currents

Scientists have identified significant changes in the Atlantic Ocean's ecosystem, likely due to shifts in ocean circulation. By analyzing sediment samples, they found a decline in cold water plankton and an increase in warm water species in Southern Iceland. These changes have caused some fish species to migrate northward. Additionally, warm water is now reaching the Arctic, potentially accelerating sea ice melting and impacting fisheries in the US and Canada.

What method did researchers use to collect samples from the ocean floor?

• Metal tubes

• Plastic tubes

• Glass jars

• Wooden boxes

What change in plankton species was observed in Southern Iceland?

• Decline in warm water species

• No change in plankton species

• Decline in cold water plankton

• Increase in cold water plankton

Which fish species is mentioned as moving northward due to ocean changes?

• Cod

• Mackerel

• Tuna

• Salmon

What is a potential consequence of warm water reaching the Arctic?

• Melting of sea ice

• Decrease in ocean salinity

• Formation of new icebergs

• Increase in Arctic fish population

How might the shift in warm water currents affect North American fisheries?

• Improvement in fish quality

• Potential disruption of key fisheries

• No impact on fisheries

• Increase in fish population