Between may 18 and august 7, 1980, mount saint helens erupted four times. what did the eruptions of mount saint helens teach scientists? a) seeding the slopes was necessary to prevent erosion. b) salvage logging was essential to protecting the arena from fire and insect threats. c) many of the initial pioneering species actually survived the eruptions. d) planting douglas fir trees was essential to recovering the forests.

C). Many of the initial pioneering species actually survived the eruptions.

1980 Mount Saint Helens volcanic eruptions was an example of ecological succession after a catastrophic event. Charlie Crisafulli was a ecologists who arrived at the volcanic site of Mount. Helen along with his colleagues to collect ecological data. He noted the development of ecological relationships across the volcanic landmass. He documented the types, amounts and distribution of surviving organisms, which further took forward the responsibility of colonization in a destructed habitat.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

mientras se trata la anorexia o la bulimia, es importante buscar ayuda antes que nada. un profesional de la salud mental será el más útil para aquellos que sufren anorexia o bulimia. este es un buen lugar para comenzar, sin embargo, ver a otros profesionales como dietistas registrados, especialistas médicos y dentistas podría ayudar a alguien a recuperarse de un trastorno alimentario. después de la ayuda profesional, o si la ayuda profesional no es una opción, alguien que se recupere de la anorexia o la bulimia debe rodearse de compañeros de apoyo, padres u otros miembros de la familia que también estén comprometidos con el proceso de recuperación.

hope this you! : )

(i popped my answer into google translate so it may be a bit wonky)