The Floristic Study of the Bryophytes of Andeok Valley, Jeju Island
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Bryophytes are a group of three divisions of non-vascular land plants, which are divided into mosses (Bryophyta), liverworts (Marchantiophyta) and hornworts (Anthocerotophyta). In Korea, approximately 900 species of bryophytes were recorded. However, only a small number of researchers have discovered new taxa and conducted taxonomic review and floristic study have not been sufficiently investigated in a regional scale. Therefore, bryophytes are still considered one of the unexplored fields. Andeok Valley is located in the western part of Jeju Island, Korea and considered very important region from an academic point of view. In addition, the evergreen broad-leaved forest has been designated and protected as a Natural Monument No. 377 by the Cultural Heritage Administration of the Republic of Korea. The vascular flora in this area was well studied, however, only a few studies on the bryophytes have been conducted to date. The present study was conducted to provide a bryophyte flora of Andeok Valley and contribute to the bryophyte flora of riparian forests and evergreen broad-leaved forests, Jeju Island and Korea on a regional scale. A total of 73 taxa belonging to Bryophyta (10 families 42 genera 59 species) and Marchantiophyta (8 families 11 genera 14 species) were determined, and the liverwort index was found to be 19.2%. The predominant life-form were the tall turf and mat type. The rates of bryophytes dominating at mesic to hygric sites were 57.5% and bryophytes, which were mainly observed in xeric habitats were 42.5%. These values indicate that the bryophyte habitats in the study area were relatively dry compared to some Gotjawal areas. The results seem to be caused that this area includes a dry stream which is one of the characteristics of Jeju Island. Upon an investigation of the substrates, bryophytes on rocks were most diverse. These results appear to stem from the fact that the rock crevice and vertical rock face formed by vertical joints, offering various types of micro-habitats for bryophytes. In addition, it was noteworthy that species adapted to the aquatic environment such as Brachythecium rivulare Schimp. and Chiloscyphus polyanthos (L.) Corda inhabit.
Abstract
Bryophytes are a group of three divisions of non-vascular land plants, which are divided into mosses (Bryophyta), liverworts (Marchantiophyta) and hornworts (Anthocerotophyta). In Korea, approximately 900 species of bryophytes were recorded. However, only a small number of researchers have discovered new taxa and conducted taxonomic review and floristic study have not been sufficiently investigated in a regional scale. Therefore, bryophytes are still considered one of the unexplored fields. Andeok Valley is located in the western part of Jeju Island, Korea and considered very important region from an academic point of view. In addition, the evergreen broad-leaved forest has been designated and protected as a Natural Monument No. 377 by the Cultural Heritage Administration of the Republic of Korea. The vascular flora in this area was well studied, however, only a few studies on the bryophytes have been conducted to date. The present study was conducted to provide a bryophyte flora of Andeok Valley and contribute to the bryophyte flora of riparian forests and evergreen broad-leaved forests, Jeju Island and Korea on a regional scale. A total of 73 taxa belonging to Bryophyta (10 families 42 genera 59 species) and Marchantiophyta (8 families 11 genera 14 species) were determined, and the liverwort index was found to be 19.2%. The predominant life-form were the tall turf and mat type. The rates of bryophytes dominating at mesic to hygric sites were 57.5% and bryophytes, which were mainly observed in xeric habitats were 42.5%. These values indicate that the bryophyte habitats in the study area were relatively dry compared to some Gotjawal areas. The results seem to be caused that this area includes a dry stream which is one of the characteristics of Jeju Island. Upon an investigation of the substrates, bryophytes on rocks were most diverse. These results appear to stem from the fact that the rock crevice and vertical rock face formed by vertical joints, offering various types of micro-habitats for bryophytes. In addition, it was noteworthy that species adapted to the aquatic environment such as Brachythecium rivulare Schimp. and Chiloscyphus polyanthos (L.) Corda inhabit.
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