文献类型：期刊文献

英文题名：Nutritional regimes transcend hydrographic boundaries: Determinants of microbial diversity across frontal systems at fine scale

作者：Nethmini, Rajapakshalage Thashikala[1];He, Qing[1];Jiang, Gonglingxia[1];Hou, Qinghua[1];Chen, Qingxiang[1];Li, Xiaolei[1];Dong, Ke[2];Xie, Lingling[1];Li, Nan[1]

机构：[1]Guangdong Ocean Univ, Dept Oceanog,Dept Educ Guangdong Prov, Coll Ocean & Meteorol,Key Lab Coastal Ocean Variat, Key Lab Climate Resources & Environm Continental S, Zhanjiang 524088, Peoples R China;[2]Kyonggi Univ, Dept Biol Sci, 154-42 Gwanggyosan Ro, Suwon 16227, Gyeonggi Do, South Korea

年份：2026

卷号：95

外文期刊名：REGIONAL STUDIES IN MARINE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:001688298200004)、、WOS

基金：This research was jointly funded by the Guangdong Ocean University Innovative Team (Early-warning of marine disasters) (Grant number 2023KCXTD015) , Guangxi Key Research and Development Program (Grant number AB24010109) , the Scientific Research Start Funds of Guangdong Ocean University, and National Research Foundation of Korea under project number NRF-2022R1F1A1066643. China-Sri Lanka Joint Center for Education & Research, Chinese Academy of Sciences.

语种：英文

外文关键词：Ocean fronts; Bacteria; Fungi; Microbial diversity; Nutrient regimes; Beibu gulf

外文摘要：Ocean fronts represent dynamic physical boundaries with steep environmental gradients that promote ecological niche differentiation and influence microbial diversity. However, their contribution to governing microbial diversity and distribution at finer spatial scales remains unclear. In this study, we investigated the microbial diversity and seasonal distribution patterns across thermal, salinity, and chlorophyll-a ocean fronts within the semi-enclosed basin of Beibu gulf, China. Our findings reveal that ocean fronts did not function as ecological boundaries facilitating niche partitioning of microbial assemblages within Beibu gulf. Hierarchical clustering showed no spatial alignment between microbial community distribution and frontal zones, and both linear and non-linear regression analyses found no significant correlations between front intensities and microbial alpha diversity. Instead, nutrients consistently emerged as the primary determinant of microbial distribution, substantially exceeding the influence of water properties and ocean fronts, with nitrogen compounds and phosphate identified as key drivers of bacterial and fungal diversity patterns. Our findings indicate that nutrient-mediated biogeochemical processes, rather than physical oceanic fronts, predominantly regulate microbial community structure in marginal seas and highlights the significance of nutrient dynamics for microbial distribution mechanisms and diversity maintenance in fine-scale marine systems.