Species Diversity Within and Among Ecosystems

摘要: Species diversity is a function of species richness, the number in given locality and evenness, degree to which relative abundances are similar [1, 2]. While this notion may be easy conceptualize, it has proven difficult, at time contentious, quantify Commonly used methods include constructing mathematical indices known as indexes (the Shannon, Simpson, Margalef being most widely used) or comparing observed patterns abundance theoretical models [3]. There no single best metric often commonly ones chosen because they familiar not necessarily appropriate [1]. The scale assessment range from within site habitat (known α diversity) difference between two more sites (β [4], can then combined give γ – landscape. Early research tended concentrated on largely diversity, but there been marked increase studies investigating β during last decade