To many human interferences, road kills, trappings, and other incidents involving humans.
Wyoming became a US state in 1890 and has pretty much had the smallest population of all the US states since that time. Wyoming's population in 1890 was 62,555 according to the 1890 US Census. In 2010, Wyoming's population was 563,626 according to the 2010 US Census. Wyoming has seen steady growth in population except for the mid-1980's when the oil bust caused a population decline.
The Bubonic Plague (a.k.a The Black Plague) caused a dramatic decline in the population of Europe in the 1300s.
Diseases brought from Europe for which they had no immunity.
The population of Summerfield Florida in 2002 is 19,410. Where as in 2010 it was reported that the population had declined to 14,487. The factors are unknown as to what caused the decline.
Disease brought over by explorers
Economis decline is what caused the naval superiority to decline then
The African skimmer is listed as "Near Threatened", not endangered. The decline in population seems to have been arrested now, and there is some resurgance in population. Habitat loss caused the initial decline.
The decline of the primary sector is caused due to the fact of less raw materials and a growth in population so more goods and services need to the sold. also farm lands are decreasing and industry is increasing.
there would be to many fish romaing the sea
The decline of Zimbabwe was from poor management and political corruption,
nobody knows
heterotrphs that comsume the carecasses of dead animals but does not typcially kill them itself