title: Inferior adaptation of bay sediments in a eutrophic shallow lake to winter season for organic matter decomposition.
abstract: Sediments in lake bays receive the greatest external pollutants mainly including terrestrial plants and river macrophyte detritus. This work investigated response and adaptation of bay sediments to organic matter (OM) decomposition under cold and hot seasons. After three month and incubated at 5 °C, it was found that the total organic carbon (TOC) removal efficiencies ranged from 15.4 to 13.1% in bay sediments to 22.6-25.7% in pelagic zone. These results determined that poorer OM decomposition occurred in the bay zone during the winter months compared to pelagic zone in a eutrophic shallow lake. High-throughput sequencing and network interactions revealed that the reactions were mainly due to the changing microbial community structure and species interaction at selected areas during different seasons. The bay zone communities are poorly adapted to utilizing the more recalcitrant carbon pool than the pelagic communities. Also, even though more taxa reside in bay communities, less co-occurrences interaction between taxa occurs, which mean that less inter taxa competition for the same resource. In consideration of our study, the potential harm, such as the terrestrialization process speeding up and water quality worsening will be happened, we need to exploit ways to enhance litter biodegradation in the bay zone in winter.
authors.affiliation: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China.
authors.forename: Na
authors.initials: N
authors.lastname: Song
authors.affiliation: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; Graduate University of Chinese Academy of Sciences, PR China.
authors.forename: Yu-Hong
authors.initials: YH
authors.lastname: He
authors.affiliation: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China. Electronic address: hljiang@niglas.ac.cn.
authors.forename: He-Long
authors.initials: HL
authors.lastname: Jiang
mesh_terms: D000064:Acclimatization; D061006:Bays / Q000737:chemistry*; D002244:Carbon / Q000032:analysis*; D002681:China; D019015:Geologic Sediments / Q000737:chemistry* / Q000382:microbiology*; D060106:Lakes / Q000737:chemistry*; D009930:Organic Chemicals / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D012621:Seasons; D013696:Temperature
chemical_list: D009930:Organic Chemicals; D002244:Carbon
keywords: Degradation; Macrophyte litter; Season; Sediment; Spatial heterogeneity