Marine ecosystems
11 questions tagged Marine ecosystems — spanning every one of the seven Ws.
Why do kelp forests grow so fast in cold coastal waters?
Kelp grows quickly because it absorbs nutrients efficiently and can turn sunlight and dissolved minerals into rapid biomass in nutrient-rich waters. Cold, upwelling seas often provide ideal conditions.
What is hydrothermal venting?
Hydrothermal venting is the release of hot, mineral-rich water from the seafloor, usually near volcanic areas. These vents can support ecosystems that do not depend on sunlight.
Where is the Sargasso Sea located?
The Sargasso Sea is in the North Atlantic Ocean, bounded by ocean currents rather than land. It is known for floating sargassum seaweed.
Where is the Bering Sea located?
The Bering Sea lies between Alaska and Russia, north of the Pacific Ocean. It is rich in fisheries and marine wildlife.
Where are the coral bleaching hot spots located?
Coral bleaching hot spots are found in warm tropical seas, especially where ocean temperatures rise above normal for weeks at a time. Famous examples include parts of the Great Barrier Reef, the Caribbean, and the central Pacific.
How do sea cucumbers help clean the seafloor?
Sea cucumbers feed on organic material in sediment and rework the seabed as they move. In doing so, they recycle nutrients and help keep the ocean floor healthier.
Why do kelp forests grow so fast in cold, nutrient-rich water?
Kelp grows quickly because cold water often brings more nutrients to the surface, and kelp can photosynthesize very efficiently in bright shallow seas. Under the right conditions, some giant kelps can grow many centimeters in a single day.
Why do coral reefs need tiny algae living inside them?
Many reef-building corals rely on symbiotic algae called zooxanthellae for much of their energy. The algae use sunlight to make sugars, helping corals build massive reefs in shallow, clear water.
Where do coral polyps build reefs?
Coral polyps build reefs in warm, shallow, sunlit tropical seas. Major reef-building regions include the Caribbean, the Red Sea, Southeast Asia, and the South Pacific.
How do hydrothermal vents support life without sunlight?
Microbes use chemicals like hydrogen sulfide from vent fluids to make energy, forming the base of food webs in total darkness.
How do kelp forest fish hide among swaying seaweed?
Many kelp forest fish use camouflage, body shape, and color patterns that blend into the moving kelp. Some also hover motionlessly or match the vertical lines of the forest.