摘要：Dissolved organic matter, one of the largest carbon pools in aquatic ecosystems, plays a critical role in global carbon cycling, yet how its composition shifts across Earth＇s main ecosystems remains unclear. Here, we tracked its changes along the aquatic continuum across four ecosystems using ultrahigh-resolution mass spectrometry and found a trend toward increasing homogenization and recalcitrance. The molecules present in all ecosystems increased from 65 +/- 20% in glaciers to 97 +/- 0.7% in the open ocean, primarily shaped by terrestrial inputs. In contrast, the others declined from 82 +/- 31 % to 3 +/- 0.7%, driven by microbial communities, especially in the glaciers and open ocean. Therefore, physicochemical processes lead to the homogenization of dissolved organic matter composition along aquatic continuums, while biological transformations increase its uniqueness. This study unveils key mechanisms driving dissolved organic matter turnover across ecosystems and underscores its pivotal role in carbon cycling under climate change.

ISSN号：2662-4435

卷、期、页：卷6期1

发表日期：2025-11-18

期刊分区（SCI为中科院分区）：无

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：COMMUNICATIONS EARTH ＆ ENVIRONMENT

参与作者：郭泌汐,刘勇勤,王建军,郑强,焦念志

第一作者：史权,何晨

论文类型：期刊论文

论文概要：郭泌汐,刘勇勤,王建军,郑强,史权,何晨,焦念志，Environmental and microbial factors shape dissolved organic matter across multiple ecosystems，COMMUNICATIONS EARTH ＆ ENVIRONMENT，2025，卷6期1

论文题目：Environmental and microbial factors shape dissolved organic matter across multiple ecosystems