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Volume 47 Number 6 Volume 48 Number 1

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Research articles

ScienceAsia 48 (2022): 94-100 |doi: 10.2306/scienceasia1513-1874.2022.029

Periphytic algal communities are highly influenced by substrate types in small pond, not large floodplain lake

Baogui Liua,b, Wei Wangb, Kuimei Qianc, Jinying Xud, Xia Liue, Jiayi Wub, Yuwei Chenf,*, Guoxiang Wangb,*

ABSTRACT:     Periphyton sampling in hydrologically flexible regions is costly because of diverse substrates and fluctuating inundation time. It remains an open question whether periphytic algae samples in floodplain lakes may be obtained by sampling some representative natural substrates instead. To obtain the answer, algal biomass, richness, diversity, and community compositions were compared on 9 types of substrates in two investigations: in a small concrete pond and in the Poyang Lake, a large floodplain lake. Results in the pond showed that the algal Shannon index and species number on Potamogeton crispus and withered Typha orientalis were substantially higher than those on T. orientalis in March; the algal biomass on T. orientalis was considerably lower than that on the other substrates in June. Conversely, no significant differences in periphyton communities were found between substrate types in the Poyang Lake. However, the redundancy analysis revealed that water depth (positively related to the colonization time) plays a key role in shifting the algal community in the Lake. Thus, our results suggest that for a precise estimation of primary production, species richness, community composition, and ecological status assessment in large floodplain ecosystems, periphytic algae must be sampled not only on adequate substrate types but also on different depth gradients.

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a School of Geography, Nanjing Normal University, Nanjing 210023 China
b School of Environmental, Nanjing Normal University, Nanjing 210023 China
c Xuzhou University of Technology, Xuzhou 221000 China
d Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education and School of Resources, Environmental & Chemical Engineering, Nanchang University, Nanchang 330031 China
e State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210023 China
f Nanchang Institute of Technology, Nanchang 330099 China

* Corresponding author, E-mail: 976370923@qq.com, wangguoxiang@njnu.edu.cn

Received 28 Jun 2021, Accepted 20 Dec 2021