Plant populations change over time by growing in size and diversity. They generally are the first part of an ecosystem after lichens (the pioneer species) and cause an ecosystem to flourish and allow for animals to move in. I don't know if this is the answer you were looking for but it should give you somewhat of a base.
America’s next great conveyor belt of progress is the Erie Canal. When the Mississippi is opened up for trade, the Erie Canal became America's next great conveyor belt of progress. It is compared to the steamboats that spawn cities along its way. It gently converts New York into a prosperous town in which resulted for the town to quadruples its size.
The French who had direct contact with the Americans were able to successfully implement Enlightenment ideas into a new political system. The National Assembly in France even used the American Declaration of Independence as a model when drafting the Declaration of the Rights of Man and the Citizen in 1789
He help to draft the constitution of 1824 and was a major influence in the addition of a general colonization provition.
The Union had more men and factories to throw at the frontlines. Although the Union had those advantages, the Confederacy was fighting on their own turf, giving them a larger advantage.
