Environmental Determinants of the Distribution of Halophila beccarii Ascherson in Hainan Island, China

Xiaoxiao Geng, Zefu Cai, Shuwen Jia, Jie Shen, Di Tang, Daoru Wang and Shiquan Chen ()
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Xiaoxiao Geng: Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Tropical Ocean University, Ministry of Education, Sanya 572022, China
Zefu Cai: Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Tropical Ocean University, Ministry of Education, Sanya 572022, China
Shuwen Jia: Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Tropical Ocean University, Ministry of Education, Sanya 572022, China
Jie Shen: Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Tropical Ocean University, Ministry of Education, Sanya 572022, China
Di Tang: Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Tropical Ocean University, Ministry of Education, Sanya 572022, China
Daoru Wang: Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Tropical Ocean University, Ministry of Education, Sanya 572022, China
Shiquan Chen: Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Tropical Ocean University, Ministry of Education, Sanya 572022, China

Sustainability, 2022, vol. 14, issue 20, 1-15

Abstract: This study presents the first record of the overall distribution of the seagrass Halophila beccarii Ascherson on the island of Hainan. Statistical and ecological methods were used to analyze the distribution of the species and the influence of environmental factors. Halophila beccarii was mainly distributed in the northwest and southeast of Hainan, in lagoons with a total area of 20.981 km 2 , including the largest H. beccarii area in China covering approximately 9.58 km 2 in Xiaohai, Wanning; there were also 4.89 km 2 in Xinying Bay, Danzhou, approximately 2.20 km 2 in Huachang Bay, Chengmai, 1.88 km 2 in Dongzhai Port, Haikou, 0.95 km 2 in Xinying Port, Lingao, approximately 0.668 km 2 in Laoyehai, Wanning, approximately 0.363 km 2 in Hongpai, approximately 0.23 km 2 in Maniao, and approximately 0.22 km 2 in Huanglong Port, Lingao. The average coverage of H. beccarii measured at 7.08–56.33%, the density of stem and branch was 487.47–20,167.1 ind/m 2 , and the biomass measured at 1.57–112.94 gDW/m 2 . The growth distribution was mainly influenced by habitat type and, to a lesser extent, by tidal branching channels, heavy metal content (Cu, Pb, Cr, Zn) in the marine environment, and human activities in adjacent coastal areas.

Keywords: Halophila beccarii; geographical distribution; influencing factors; Hainan Island (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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