A B C D 1 2 3 4 5 6 7 The Coriolis effect current oligotrophic Gulf Labrador current zooplankton Bioluminescence A littoral Aquatic ecosystems that have a thin layer of water covering soil that is wet some or most of the time are called Which has higher oxygen levels? hypoxic B Which is most likely to have runoff that will upset the balance of nutrients in bodies of water? downwelling Estuaries contain what? mesotrophic stream nekton detritus biotic abiotic What are coral reefs? Which natural disaster is made worse when people destroy estuaries? benthos Phytoplankton intertidal zones Give three examples of a freshwater ecosystem upwelling Runoff fertilizer and livestock waste from farms can add ____________ to a pond. eutrophication C D