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당지희,오현경,김기선,이종성,변상돈,서재화,도민석 한국양서ㆍ파충류학회 2024 한국양서·파충류학회 학술대회 Vol.2024 No.07
양서류는 피부로 호흡하는 변온동물로 다른 척추동물에 비해 기후변화에 취약한 분 류군이며 전 세계에 서식하는 양서류 중 1/3이 멸종될 위기에 처해 있어 국가 차원 의 보전 및 관리가 필요하다. 본 연구는 국내 무미류 13종의 개체군 크기를 파악하 고 주요 서식 환경 및 출현 시기, 서식에 영향을 끼친 주요 환경요인과 종간 생태적 지위, 음향측정기를 통한 지역별 최초 번식일을 확인하기 위해 수행되었다. 현장 조 사는 2021년부터 2023년, 2월부터 7월 사이 전국에 서식하는 양서류의 주요 번식지 인 논 습지와 계곡 및 하천을 대상으로 반경 100m의 고정조사구 총 135개를 설정하 여 정량적인 종별 밀도를 산출하였고, 매월 같은 시기에 수행하였다. 그 결과, 계곡 산개구리, 큰산개구리, 청개구리 순으로 서식 밀도가 높았고 물두꺼비는 가장 낮은 밀도를 보였다. 수원청개구리와 금개구리는 평지 논, 계곡산개구리와 물두꺼비는 산 지 계곡 및 하천에서 전체 출현 개체의 90% 이상이 서식하고 있었다. 무미류의 서식 에 영향을 끼친 주요 환경변수는 고도, 지면 온도, 경관 유형순으로 나타났다. 무미 류 5종이 출현한 논의 경작 유형은 서로 차이를 보였으며, 종간 평균 생태적 지위 값(PI)은 0.401로 비교적 낮은 것으로 확인되어 종간 경쟁이 크지 않으리라고 예상된 다. 큰산개구리와 참개구리, 청개구리, 수원청개구리 4종의 최초 번식일은 2021년도 에 비해 2022년과 2023년도의 번식 일자가 점진적으로 빨라지는 경향을 보였다. 추 후 종별 개체군 크기와 최초 번식일 변화 등에 관한 정보를 장기간 축적하여 기후변 화로 인한 국내 양서류의 위협을 감지하고 대응 방안 모색이 필요하다.
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하천제방 양질사토에 대한 수크령과 억새 뿌리의 토양전단강도 보강효과
당지희 ( Dang Ji-hee ),조용현 ( Cho Yong-hyeon ),이춘석 ( Lee Chun-seok ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2017 한국환경복원기술학회지 Vol.20 No.2
This study was conducted to find out the physical properties and soil shearing strength reinforcement effect of herbaceous plants for the slope revegetation works. Two native plants(Pennisetum alopecuroides and Miscanthus sinensis) were used for this experiment, because they have excellent seed germination rates without preconditioning, and grow naturally around rivers. To identify the physical properties, the partial dry weight of plants were investigated. To identify the soil shearing strength reinforcement effect, the respective soil shearing strengths of the control soils, Pennisetum alopecuroides, Miscanthus sinensis samples were measured. Also, we did a correlation analysis to examine the relation of shearing strength to plant features. The results are summarized as follows: 1. The average dry weight of Pennisetum alopecuroides samples consists of 52.36% above ground and 47.64% at root. And in dry weight, 78.24% of it`s root distributes within 10 cm in soil depth. Meanwhile the average dry weight of Miscanthus sinensis samples consists of 52.91% above ground and 47.09% at root. And in dry weight, 82.95% of it`s root distributes within 10 cm in soil depth. 2. The results of correlation analysis showed that for both Pennisetum alopecuroides and Miscanthus sinensis, it could not be said that there was any correlation between shearing strength and plant characteristics, and statistically they were not meaningful. 3. In the shearing strength test with control soils, Pennisetum alopecuroides, Miscanthus sinensis as subjects, the differences in shearing strength measurement results were modest, and the order was shown as control soils < Pennisetum alopecuroides < Miscanthus sinensis, so the soil shearing strength reinforcement effect by the Pennisetum alopecuroides and the Miscanthus sinensis on loamy sand at river banks surface was confirmed.
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신수경,Jung Kwang Soo,Kang Hong Gu,당지희,Doohee Kang,Han Jeong Eun,김진한 한국생태학회 2021 Journal of Ecology and Environment Vol.45 No.4
Background: Citizen science is becoming a mainstream approach of baseline data collection to monitor biodiversity and climate change. Dragonflies (Odonata) have been ranked as the highest priority group in biodiversity monitoring for global warming. Ischnura senegalensis Rambur has been designated a biological indicator of climate change and is being monitored by the citizen science project “Korean Biodiversity Observation Network.” This study has been performed to understand changes in the distribution range of I. senegalensis in response to climate change using citizen science data in South Korea. Results: We constructed a dataset of 397 distribution records for I. senegalensis, ranging from 1980 to 2020. The number of records sharply increased over time and space, and in particular, citizen science monitoring data accounted for the greatest proportion (58.7%) and covered the widest geographical range. This species was only distributed in the southern provinces until 2010 but was recorded in the higher latitudes such as Gangwon-do, Incheon, Seoul, and Gyeonggi-do (max. Paju-si, 37.70° latitude) by 2020. A species distribution model showed that the annual mean temperature (Bio1; 63.2%) and the maximum temperature of the warmest month (Bio5; 16.7%) were the most critical factors influencing its distribution. Future climate change scenarios have predicted an increase in suitable habitats for this species. Conclusions: This study is the first to show the northward expansion in the distribution range of I. senegalensis in response to climate warming in South Korea over the past 40 years. In particular, citizen science was crucial in supplying critical baseline data to detect the distribution change toward higher latitudes. Our results provide new insights on the value of citizen science as a tool for detecting the impact of climate change on ecosystems in South Korea. Background: Citizen science is becoming a mainstream approach of baseline data collection to monitor biodiversity and climate change. Dragonflies (Odonata) have been ranked as the highest priority group in biodiversity monitoring for global warming. Ischnura senegalensis Rambur has been designated a biological indicator of climate change and is being monitored by the citizen science project “Korean Biodiversity Observation Network.” This study has been performed to understand changes in the distribution range of I. senegalensis in response to climate change using citizen science data in South Korea. Results: We constructed a dataset of 397 distribution records for I. senegalensis, ranging from 1980 to 2020. The number of records sharply increased over time and space, and in particular, citizen science monitoring data accounted for the greatest proportion (58.7%) and covered the widest geographical range. This species was only distributed in the southern provinces until 2010 but was recorded in the higher latitudes such as Gangwon-do, Incheon, Seoul, and Gyeonggi-do (max. Paju-si, 37.70° latitude) by 2020. A species distribution model showed that the annual mean temperature (Bio1; 63.2%) and the maximum temperature of the warmest month (Bio5; 16.7%) were the most critical factors influencing its distribution. Future climate change scenarios have predicted an increase in suitable habitats for this species. Conclusions: This study is the first to show the northward expansion in the distribution range of I. senegalensis in response to climate warming in South Korea over the past 40 years. In particular, citizen science was crucial in supplying critical baseline data to detect the distribution change toward higher latitudes. Our results provide new insights on the value of citizen science as a tool for detecting the impact of climate change on ecosystems in South Korea.
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