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Seasonal changes in benthic algal communities of the upper subtidal zone in Sanya Bay (Hainan Island, China)

  • Eduard A. Tytlyanov (a1) (a2), Tamara V. Titlyanova (a1) (a2), Hui Huang (a1) (a3) and Xiubao Li (a1) (a3)


A floristic study of the marine plants and algae at Luhuitou reef, Sanya Bay, Hainan Island, China, was conducted during the rainy (October 2008 and November 2010) and dry seasons (April 2009 and February 2012). Specimens were collected in the upper subtidal zone (from 0.5 to 3 m depth at low tide). A total of 156 taxa were collected, including 143 macrophyte species (90%), 12 blue–green algal species (10%), and the seagrass, Thalassia hemprichii. The most diverse group was the Rhodophyta (79 taxa or 55%), followed by the Chlorophyta (38 taxa or 25%) and then the Phaeophyceae (26 taxa or 20%). In the upper subtidal zone, macroalgae formed two types of communities: polydominant communities of turf-forming algae and monodominant and bidominant communities of foliose or fleshy algae. Seasonal changes occurred in the dominant species, which appear to be caused by periodic annual events of thalli detachment and subsequent community succession. In spite of heavy pollution from dissolved inorganic nitrogen and phosphorus in Sanya Bay, the subtidal flora has not undergone any dramatic changes in species numbers or composition and is similar to that of unpolluted regions in the Indo-Pacific.


Corresponding author

Correspondence should be addressed to: Xiubao Li, CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, 164 West Xingang Road, Guangzhou, 510301, China email:


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Seasonal changes in benthic algal communities of the upper subtidal zone in Sanya Bay (Hainan Island, China)

  • Eduard A. Tytlyanov (a1) (a2), Tamara V. Titlyanova (a1) (a2), Hui Huang (a1) (a3) and Xiubao Li (a1) (a3)


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