1. Around 1900 the first dams were built on the Muskegon river, and this immediately cause a problem in the ecosystem by being a blockade for the movement of the water species, as well as causing higher mortality by killing them in the turbines.
2. By 1950 more dams were built, and the there were even more blockades on the way of the water species, so their movement was restricted even more, the mortality rates skyrocketed because of the disposing of the oxygen, temperature change, river flows changing etc.
3. Even though the scientists miss information from the period before the dams were built, since the information have started to be gathered it has been very obvious that the main factor for ruining the ecosystems on the Muskegon river are the dams by causing all sorts of changes in the water.
Some colonists became skilled craftsmen in the Middle Colonies because it ended up not being enough open farm land for everyone to farm and there was, at that time, not enough of other trades so instead of farming, they went to craftsmanship. Most of the farm land was also covered with a lot of forestry and at the time, tree removal was a very long and lengthy process; this meant that land would open up at a painfully slow pace. Basically, they didn't have much of an option to go to other avenues to make money.
Answer:
los Andes, la sierra Madre, la Sierra Nevada de Santa MArta, el Macizo de Guyana, cadena costera del Pacifico.
Explanation:
Depende en que parte vivas, si vives en Suadamerica recomiendo hablar de Los Andes, y si eres de centroamerica o Mexico habla de las sierras madre.
Estas cadenas montanosas no son tan viejas a comparacion de otras. Aunque sus buenos millones de anos si tienen
The tradition of the easter bunny began in Germany
