Composition and Diversity of Over-Wintering Aquatic Bird Community on Poyang Lake, China

Qingming Wu,Zhe Li,Zhuo Xu,Megersa Tsegaye Debela,Xueying Sun,Lu Chen

doi:10.3390/d12080308

Abstract

The present study aimed to investigate the structure, composition and diversity of the over-wintering aquatic bird community of Poyang Lake, including Poyang Lake National Nature Reserve (PNNR), Nanji National Nature Reserve (NNNR) and Duchang Provincial Nature Reserve (DPNR), China. After the preliminary survey, birds surveyed from vantage points at each study site between the years 2016 and 2020 in the winter season. A total of 58 bird species belonging to nine orders and 13 families were observed. The study showed variation in effective species numbers (Species richness, Shannon’s diversity and Simpson’s diversity) among the three study sites and the survey years. Nanji National Nature Reserve had the highest avian diversity, whereas Duchang Provincial Nature Reserve had the lowest. Globally threatened bird species, Siberian Crane (critically endangered), Oriental Stork (endangered), found in our study sites. However, the current management practices of the nature reserve and conservation of this globally threatened bird species are inadequate, especially of Duchang Provincial Nature Reserve. Therefore, for long term conservation of birds in these areas, it needs continuing intentional improvement of the sites and awareness creation to the local community.

Highlights

Poyang Lake is the largest freshwater lake in East Asia [1] and is of global importance for conserving migratory aquatic bird of the East Asian–Australasian Flyway [2,3]
This study conducted in three nature reserves of Poyang lake, namely Poyang Lake National Nature Reserve (PNNR), National Nature Reserve (NNNR) and Duchang Provincial Nature Reserve (DPNR) (Table 1), located in the western, southwestern and northeastern parts of Poyang Lake, respectively
We conducted this study in two National nature reserve and one Provincial nature reserve of Poyang lake (i.e., 16 sub lakes from each PNNR and NNNR, 10 sub lakes from DPNR)

Summary

Introduction

Poyang Lake is the largest freshwater lake in East Asia [1] and is of global importance for conserving migratory aquatic bird of the East Asian–Australasian Flyway [2,3]. In addition to the main tributaries that drain into the lake, a seasonal reverse-flow system has significantly contributed to the complexity of its yearly hydrological variation [6,7]. This variation, both within and among years, directly contributes to the large biomass of plant life [5,8], which provides a wide range of foraging options for many aquatic bird species [2,9,10,11]

Methods

Results

Conclusion