Characterisation (δ13C and δ15N isotopes) of the food webs in a New Zealand stream in the Waitakere Ranges, with emphasis on the trophic level of the endemic frog Leiopelma hochstetteri

摘要: Abstract Leiopelma hochstetteri, the most widespread of New Zealand's native frogs, is recognised as threatened, and fully protected by legislation. As a first step to characterise diet trophic level L. hochstetteri within streams in Waitakere Ranges, Auckland, stable carbon nitrogen isotope analyses were undertaken on variety sympatric terrestrial aquatic plant animal species, including adult frogs. These results show that: (1) food webs are linked inputs into stream; (2) invertebrate vertebrate predators separate well distinct groups, (3) occupies an intermediate position among predators, with diet, at least adult, comprising invertebrates. Shortfin eels banded kokopu identified potential but data for rats inconclusive. have important implications conservation Zealand frog species an...