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 Flavobacteria are keystone taxa in global carbon cycling, specializing in the degradation of complex glycans across marine and terrestrial ecosystems. Their distinct suites of carbohydrate-active enzymes (CAZymes) are tailored to habitat-specific substrates, suggesting that glycan-driven genome evolution may have contributed to their divergence. Using plastid-based molecular clocks calibrated with eukaryotic fossil data, we estimate that flavobacteria emerged between 2.15 and 1.98 billion years ago (Gya), shortly after the Great Oxidation Event, a planetary process that correlates with enhanced organic carbon burial. Their subsequent diversification involved three marine-to-non-marine transitions during the Proterozoic (1.98–1.70 Gya, 1.72–1.40 Gya, and 1.28–1.14 Gya), periods that align with tectonic events during the assembly and fragmentation of the Columbia supercontinent. These ecological shifts coincided with genome erosion, including the irreversible accumulation of slightly deleterious mutations, which explains the observed asymmetric niche shifts that favored unidirectional adaptations to non-marine environments. While tectonic processes likely increased habitat availability, subsequent glycan specialization may have underpinned ecological success in these newly formed niches. Our findings highlight the interplay of extrinsic geological dynamics and intrinsic genomic and metabolic adaptations in shaping flavobacteria evolution and their role in Earth’s carbon cycle.
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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