Ecotourism helps preserve biodiversity by promoting sustainable travel practices that minimize environmental impact and foster conservation efforts. It encourages local communities to protect their natural resources by providing economic incentives through responsible tourism. Additionally, ecotourism often funds conservation projects and raises awareness about the importance of biodiversity, fostering a greater appreciation for ecosystems. By prioritizing environmental stewardship, ecotourism contributes to the preservation of habitats and the species that inhabit them.
Because the organisms have a stronger interaction and food chain with more speicies present. Also, say a species was in danger because its food source was also dying out. With higher biodiversity, there is a better chance the species can find some replacement or change its food source. Also the saying "One man's trash is another man's treasure" relates to bodiversity. SOmething one species finds as unhelpful or nothing may be of vital importance to another.