Semiconservative replication was not the only model of DNA replication proposed during the mid-1950s, however. In fact, two other prominent hypotheses were put also forth: conservative replication and dispersive replication.
Main idea. Aquatic ecosystems are grouped based on abiotic factors such as water flow, depth,distance from shore, salinity, and latitude. Freshwater ecosystems. The major freshwater ecosystems include ponds, lakes, streams,rivers, and wetlands.
Abiotic factors are those that affect living organisms in freshwater systems, and biotic factors affect species in the surrounding area. Although crustaceans, woodlice do not â¦ live in water. Rather, they thrive in damp areas that provide moisture as woodlice rapidly lose hydration through excretion.