Sex on the beach. The semen goes into the water and gets caught in the horseshoe crab's lungs and they choke and die.
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
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.
Economis decline is what caused the naval superiority to decline then
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.
The decrease in the Gila monsters population is mainly due to habitat loss from urbanization, agriculture, and mining activities, as well as fragmentation of their habitat from roads and development. Additionally, illegal collection for the pet trade and being killed by humans due to fear and misunderstanding have also contributed to the decline in their population.
The steady decline of the black-footed ferret population in Wyoming was primarily caused by habitat loss, disease, and the decline of their main prey, the prairie dog. The spread of sylvatic plague significantly impacted prairie dog colonies, leading to a reduction in food sources for the ferrets. Additionally, habitat destruction due to agriculture and urban development further exacerbated their decline. Conservation efforts have since been implemented to help recover the population.
there would be to many fish romaing the sea
The decline of Zimbabwe was from poor management and political corruption,
To many human interferences, road kills, trappings, and other incidents involving humans.