"Elton focused on the niche of a species as its functional role within the food chain and its impact upon the environment" {{cite book |author1=Jonathan M. Chase |author2=Mathew A. Leibold |title=Ecological Niches: Linking Classical and Contemporary Approaches |url=https://books.google.com/books?id=Ssmcl_ubQUQC&pg=PA7 |page=7 |isbn=9780226101804 |year=2003 |publisher=University of Chicago Press}}</ref>"“Elton 专注于一个物种的龛位,因为它在食物链中的功能作用及其对环境的影响。” | "Elton focused on the niche of a species as its functional role within the food chain and its impact upon the environment" {{cite book |author1=Jonathan M. Chase |author2=Mathew A. Leibold |title=Ecological Niches: Linking Classical and Contemporary Approaches |url=https://books.google.com/books?id=Ssmcl_ubQUQC&pg=PA7 |page=7 |isbn=9780226101804 |year=2003 |publisher=University of Chicago Press}}</ref>"“Elton 专注于一个物种的龛位,因为它在食物链中的功能作用及其对环境的影响。” |