Growth and morphological responses of Halophila beccarii to low salinity
Vol. 131 No. 1B (2022), Original Article
Vol. 131 No. 1B (2022)

Growth and morphological responses of Halophila beccarii to low salinity

Original Article
https://doi.org/10.26459/hueunijns.v131i1B.6452
Published 2022-06-30
Dang Thi Le Xuan*
University of Education, Hue University, 34 Le Loi St., Hue, Vietnam
Phan Thi Thuy Hang
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Hoang Cong Tin
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Ton That Phap
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Luong Quang Doc
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
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Keywords

Halophila beccarii
brackish lagoon
salinity
seagrass

How to Cite

1.
Dang Thi Le Xuan X, Phan TTH, Hoang CT, Ton TP, Luong QD. Growth and morphological responses of Halophila beccarii to low salinity. hueuni-jns [Internet]. 2022Jun.30 [cited 2024Apr.20];131(1B):47-5. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/6452
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Abstract

Halophila beccarii Ascherson is classified as a threatened seagrass species by IUCN because of the reductive tendency of ​​its distribution area. This seagrass is considered a euryhaline species adapted to a wide range of salinities from freshwater and brackish water to marine water. Previous studies showed that the species tends to grow better under low salinity; however, its optimum salinity has not been determined. In Vietnam, H. beccarii grows in habitats with low salinity (0–20 ppt). The results show that salinity affects the growth, survival rate, shoot density, biomass, and morphological characteristics of the grass. The leaf dimension is more prolonged and broader; the petiole and shoot length are longer at 10 ppt salinity. In contrast, both the number of shoots and biomass peak at 5 ppt and decrease at lower and higher salinities. The study reveals that H. beccarii can grow better under mesohaline conditions than freshwater and hypersaline conditions with an optimum salinity at 5–10 ppt. These findings would explain the species’ distribution dynamics in coastal environments and be helpful information for conserving the seagrass populations in habitats with fluctuating salinity as coastal lagoons in Central Vietnam.

https://doi.org/10.26459/hueunijns.v131i1B.6452
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