Factors that decrease population growth can be defined as environmental stress including limitations in food, predation, and other density-dependant factors (Sibley & Hone 2002). However, many sources of environmental stress affect population growth, irrespective of the density of the population. Density-independent factors, such as environmental stressors and catastrophe, are not influenced by population density change.
Zoan was the capital of the Hyksos rulers, or shepherd kings, in whose time Jacob came into Egypt, and their monuments have been found at the site, which favors the conclusion that its plain was that land of Rameses (Genesis 47:11 Exodus 12:37; see RAAMSES) where the Hebrews had possessions under Joseph.
Therefore the name of the city was called Zoar. Genesis 19:23 The sun had risen on the earth when Lot came to Zoar. Genesis 19:30 Lot went up out of Zoar, and lived in the mountain, and his two daughters with him; for he was afraid to live in Zoar. He lived in a cave with his two daughters. Deuteronomy 34:3 and the South, and the Plain of the valley of Jericho the city of palm trees, to Zoar.