인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Abstract The conversion of intrinsic lands to anthropogenic uses has increased nutrient inputs for lake microbes, profoundly influencing biogeochemical processes, particularly carbon cycling. Microbial carbon utilization is crucial in lake carbon sequestration, but its general changes under anthropogenic disturbances remain controversial. We combined carbon utilization assays with Biolog EcoPlates and 16S rRNA gene amplicon sequencing to examine microbial carbon utilization and carbon loss in lakes along a 3369 km gradient of land-use intensities spanning the Yangtze River and its front basin across China. Our results demonstrated that >30% land-use conversions from intrinsic to anthropogenic lands (farmland and built areas) resulted in >50% carbon loss in lakes. The large carbon loss was primarily driven by elevated nutrient concentrations, which stimulated microbial carbon utilization. Microbes in water were more responsive to environmental changes than those in sediment. We further identified distinct preferences of microbial carbon utilization driven by compositional shifts in core species. Specifically, nutrient-sensitive species ( Roseomonas and Methylocystis ) were replaced by nutrient-preferential species ( Desertimonas and Clostridium sensu stricto ), which collectively enhanced the utilization of substrates such as itaconic acid, phenylethyl-amine and glycerol, thereby accelerating carbon loss. This study quantifies the relationship between microbial carbon utilization and carbon loss, emphasizing the importance of regulating land-use changes and nutrient inputs to mitigate their impacts on lakes.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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