AP BIOLOGY

Detailed explanation-1: -Explanation: Hydrologist and Oceanographer used to test salinity, depth, temperature of ocean water and whether the water is flowing or standing in case of large water mass or stagnant water body to classify aquatic system.

Detailed explanation-2: -Ecologists classify aquatic ecosystems according to criteria such as salinity, depth, and whether the water is flowing or standing. Standing freshwater ecosystems include ponds, lakes, inland seas, and wetlands. Flowing freshwater ecosystems include rivers and streams.

Detailed explanation-3: -Aquatic biomes can be generally classified based on the amount of salt in the water. Freshwater biomes have less than 1% salt and are typical of ponds and lakes, streams and rivers, and wetlands. Marine biomes have more salt and are characteristic of the oceans, coral reefs, and estuaries.

Detailed explanation-4: -, n a global scale, aquatic habitats are classified on the basis of salinity as either marine or freshwater. Marine environments include the open ocean, bays and sounds as well as brackish water habitats such as coastal marshes and estuaries.

Detailed explanation-5: -Ecologists typically divide the ocean into zones based on depth and distance from shore. Starting with the shallowest and clos-est to land, marine ecosystems include the intertidal zone, the coastal ocean, and the open ocean, as shown in Figure 4-22. Within these zones live a number of different communities.