期刊
JOURNAL OF MARINE SCIENCE AND ENGINEERING
卷 10, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/jmse10040549
关键词
Sargassum thunbergii; morphological variability; seaweed morphology; multiple environmental factors; intertidal zone
资金
- National Institute of Fisheries Science (NIFS), Korea [R2022055]
- Basin Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2019R1I1A1A01057599]
- National Research Foundation of Korea [2019R1I1A1A01057599] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Intraspecific morphological variation in Sargassum thunbergii is influenced by different environmental factors, leading to the formation of three distinct groups. Group M1 and M3 are affected by wave action and tidal amplitudes, while group M2 is influenced by warm temperatures and high irradiance. The morphology of S. thunbergii reflects and adapts to local environmental conditions, with tidal condition playing a significant role.
Intraspecific variation in morphology is widespread among seaweed species in different habitats. We examined the morphological variation in Sargassum thunbergii involving diverse environmental factors. We quantified 16 morphological characteristics on 15 rocky intertidal shores in Korea. A cluster analysis based on morphology identified three groups. Group M1 comprised populations on the northern part of the east coast, where the thalli was short and thick, with large leaf and air-vesicle. Group M3 consisted of populations on the west coast exclusively separated from other populations, with short, slender and sparsely branched thalli. Group M2 comprised populations on the southern part of the east coast and on the south coast (including Jeju Island), with longest thalli and lateral branches. Principal coordinate analyses showed that group M1 and M3 were mostly influenced by strong wave action and large tidal amplitudes, respectively. Group M2 were under the influence of warm temperatures and high irradiance. Biota-environment matching analysis showed that the morphology is affected by combinations of different local environmental factors and also that tidal condition is important as a single variable, suggesting that morphology of S. thunbergii reflects and adapts to local environmental conditions.
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