Microbial Diversity in World-Unique Lava Gotjawal, Jeju

• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: Jong Shik Kim
• 간행물 정보: 『한국유화학회 학술대회 논문집』2017년 추계학술대회, 91~92쪽, 전체 2쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2017.11.02

영문 초록

The microbial diversity of Gotjawal forests analyzed, in the Jeju Island, Korea, which have grown on volcanic soils. The unique basalt morphology, diverse vegetation associated with microclimates, and ecological features shaped by volcanic activity of this region have supported the growth of the forest on lava flows. These forests also function as a roof over pristine aquifers, as well as porous rocks that purify and recharge groundwater. The Gotjawal forest represents a biosphere; it has enormous biodiversity and includes plant species of both the northern and southern hemispheres. However, many regions of the Gotjawal forest have been used for the production of charcoal and edible mushrooms and are grazed by horses, cows, and other herbivores. As a result, secondary forests have developed on disturbed sites. Overall, the Gotjawal forest represents a species-rich ecosystem, but these forests have been gradually disappearing in recent decades. Approximately 50% of these forests have been destroyed by unregulated construction and urbanization, and only 6% of the island has been left undisturbed. The forest is crucial for replenishing the only water source for the half-million inhabitants of Jeju Island and for nursing its unique flora and fauna, which include some endangered species and other species endemic to the island. The term “Gotjawal soils” specifically refers to soils derived from these forests, and these soils are characterized by high organic matter content and fertility and low rocky soil content. Here, we report the study of the structure and functions of the microbial community in Gotjawal soils using GeoChip. The overall goal of this study was to understand the structure and functions of the microbial communities that may play important roles in the soil of the Gotjawal forest. Twenty soil samples were collected in November 2010 from four large regions representing the entire Gotjawal forest: (1) Hankyung-Andeok (HA) Gotjawal Terrain in the west, (2) Aewol Gotjawal (AW) Terrain in the northwest,(3) Jocheon-Hamduck (JH) Gotjawal Terrain in the north-east, and (4) Gujwa-Seongsan (GS) Gotjawal Terrain in the east. Two representative areas of the JH Gotjawal terrain, Gyorae and Dongbackdongsan,were regrouped into the AW and GS Gotjawal Terrains, and the Jeoji (JJ) area of HA Gotjawal Terrain was reclustered into the AW Terrain using hierarchical clustering of GeoChip microarray data. Our results suggest that these soils are reservoirs of diverse microbial communities in the Gotjawal forest, which have not yet fully investigated.

키워드

Gotjawal Forest Microbial Diversity