https://repository.kopri.re.kr/handle/201206/5208 Sat, 18 Apr 2026 13:44:36 GMT 2026-04-18T13:44:36Z https://repository.kopri.re.kr/handle/201206/5822 Title: Shifts in bacterial community structure during succession in a glacier foreland of the High Arctic Authors: Kim, Mincheol; Lee, Yoo Kyung; Kwon, Hye Young; Dominique Laffly; Jung, Ji Young Abstract: Primary succession after glacier retreat has been widely studied in plant communities, but bacterial succession is still poorly understood. In particular, few studies of microbial succession have been performed in the Arctic. We investigated the shifts in bacterial community structure and soil physicochemical properties along a successional gradient in a 100-year glacier foreland of the High Arctic. Multivariate analyses revealed that time after glacier retreat played a key role in associated bacterial community structure during succession. However, environmental filtering (i.e., pH and soil temperature) also accounted for a different, but substantial, proportion of the bacterial community structure. Using the functional trait-based approach, we found that average rRNA operon (rrn) copy number of bacterial communities are high in earlier successional stages and decreased over time. This suggests that soil bacterial taxa with higher rrn copy number have a selective advantage in early successional stages due to their ability of rapidly responding to nutrient inputs in newly exposed soils after glacier retreat. Taken together, our results demonstrate that both deglaciation time and environmental filters play key roles in structuring bacterial communities and soil bacterial groups with different ecological strategies occur in different stages of succession in this glacier foreland. Sun, 01 Jan 2017 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/5822 2017-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/7390 Title: Soil development and bacterial community shifts along the chronosequence of the Midtre Lovenbreen glacier foreland in Svalbard Authors: Kwon, Hye Young; Lee, Yoo Kyung; Lim, Hyoun Soo; Dominique Laffly; Kim, Ok-Sun; Jung, Ji Young Abstract: Global warming has accelerated glacial retreat in the high Arctic. The exposed glacier foreland is an ideal place to study chronosequential changes in ecosystems. Although vegetation succession in the glacier forelands has been studied intensively, little is known about the microbial community structure in these environments. Therefore, this study focused on how glacial retreat influences the bacterial community structure and its relationship with soil properties. This study was conducted in the foreland of the Midtre Lovenbreen glacier in Svalbard (78.9°N). Seven soil samples of different ages were collected and analyzed for moisture content, pH, soil organic carbon and total nitrogen contents, and soil organic matter fractionation. In addition, the structure of the bacterial community was determined via pyrosequencing analysis of 16S rRNA genes. The physical and chemical properties of soil varied significantly along the distance from the glacier;with increasing distance, more amounts of clay and soil organic carbon contents were observed. In addition, Cyanobacteria, Firmicutes, and Actinobacteria were dominant in soil samples taken close to the glacier, whereas Acidobacteria were abundant further away from the glacier. Diversity indices indicated that the bacterial community changed from homogeneous to heterogeneous structure along the glacier chronosequence/distance from the glacier. Although the bacterial community structure differed on basis of the presence or absence of plants, the soil properties varied depending on soil age. These findings suggest that bacterial succession occurs over time in glacier forelands but on a timescale that is different from that of soil development. Thu, 01 Jan 2015 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/7390 2015-01-01T00:00:00Z