Porphyra is mainly distributed in the intertidal zone from the Yellow Sea and Bohai Sea to the southeast coast. In addition, a few species of laver are distributed in the coastal areas of Taiwan Province Province and Hainan Island, and their distribution has regional characteristics. Porphyra species naturally distributed in the Yellow Sea and Bohai Sea include Porphyra yezoensis, Porphyra yezoensis and Porphyra hemiphylla. Porphyra yezoensis, Porphyra rugosa and Porphyra yezoensis are mainly distributed in the southeast coast.

In addition, Porphyra rotundifolia is widely distributed in China's coastal areas, growing from south to north, and it is a wide-temperature variety. At present, based on natural groups and habitat environment, Porphyra yezoensis in the north of the Yangtze River and Porphyra haitanensis in the south of the Yangtze River have been formed in China.

Extended data

Nutritional Value of Porphyra: Porphyra is one of the most abundant seaweeds in protein. The content of protein in laver varies with species, growth time and place. Generally, the content of protein accounts for 25% ~ 50% of the dry weight of laver.

Noda et al. studied the contents of bound amino acids and free amino acids in Japanese laver. The results showed that Porphyra japonica was rich in alanine, aspartic acid, glutamic acid and glycine. Porphyra also contains a lot of taurine, which is more than 65438 0.2% of the dry weight of algae. Taurine is a sulfonated amino acid derived from cystine, which can promote the intestinal and liver circulation of cholic acid and control the blood cholesterol level by forming taurocholic acid.

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