Mercury is present in seawater in small quantities. It gets into the marine food chain starting at the very bottom, absorbed by microscopic algae. Larger, carnivorous species like sharks and ...

Every animal and plant needs food ... chains usually start with a plant and finish with a big hungry animal… The longest recorded food chain involves over thirty organisms found in the deep ocean.

Levels of lead and other heavy metals spiked in L.A.’s coastal waters after the January fires, raising serious concerns for ...

Zooplankton are one of the most diverse and abundant groups of organisms on Earth and they play an essential role in the marine food chain. Unable to photosynthesise, as phytoplankton do ...

All organisms in an ecosystem depend on each other. Food chains show the flow of energy from one organism to another. Food chains show the feeding relationships between organisms. Food webs show ...