Abstract:
Exploring the temporal and spatial patterns of taxonomic diversity can help ecologists to understand the interactions between biodiversity and ecosystems, and to formulate conservation strategies. In this paper, the spatial and temporal patterns of amphibians taxonomic diversity in the Badagongshan National Nature Reserve were investigated in 2018. In the study area, field surveys of amphibians were conducted in April, June, August and October, respectively, in 10 transects along an elevation gradient. The results show that the species composition and three taxonomic diversity indices (i.e., species richness, Shannon-Wiener index and Pielou evenness index) of the amphibian community were significantly different with the changes of seasons and elevations. Specifically, at the temporal scale, the dominant species were
Leptobrachella liui and
Amolops ricketti in April,
Odorrana schmackeri in June,
O. schmackeri and
Odorrana margaretae in August, and
Quasipaa boulengeri and
A. ricketti in October. However, at the spatial scale the dominant species were
O. schmackeri and
A. ricketti at low-altitude transects,
Leptobrachella liui and
Pseudohynobius flavomaculatus at mid-altitude transects,
Q. boulengeri,
Leptobrachium boringii and
Pseudorana sangzhiensis at high-altitude transects. In terms of the taxonomic diversity indices, values of the three indices were higher in June and August than those in April and October. While at the level of the whole year, there was no significant correlation between species richness and altitude. However, Shannon-Wiener index and Pielou evenness index showed significant hump-shaped responses with the increasing altitude. In different months, it was found that there were no significant correlations between taxonomic diversity indices and altitude (except the Shannon-Wiener index in June which showed a hump-shaped response with the increasing altitude). Overall, the study indicates that the taxonomic diversity of amphibians changes at both temporal and spatial scales. This can be attributed to various breeding cycles and hibernation cycles of amphibians, as well as their diverse temperature adaptation capabilities and habitat preferences.