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.
Biotic and abiotic factors affect the organisms in an ecosystem. Biotic factors may include things like predation, disease, competition, parasitism, consumption, and symbiosis. And certainly abiotic factors, like the weather, can also impact living things. The interplay of all the biotic and abiotic factors in an ecosystem determines the carrying capacity of that ecosystem for any particular species.