1 https://askabiologist.asu.edu/explore/biomes

$^2$ https://www.britannica.com/science/biome

$^3$https://www.nationalgeographic.org/encyclopedia/ecosystem/

$^4$https://www.britannica.com/science/ecosystem

$^5$https://sciencing.com/abiotic-biotic-factors-ecosystems-7146052.html

$^6$https://www.nationalgeographic.org/article/five-major-types-biomes/

$^7$https://www.nationalgeographic.org/encyclopedia/rain-forest/

$^8$https://sciencing.com/difference-between-the-temperate-forest-rainforest-12507773.html

$^9$https://eartheclipse.com/ecosystem/marine-biome.html#Types_of_Marine_Biomes

$^{10}$ https://sciencing.com/factors-affecting-marine-life-8186143.html

$^{11}$https://www.dgb.earth/carbon-offset-blog/marine-ecosystems-conservation

$^{12}$https://www.thoughtco.com/what-is-marine-conservation-2291532