Microcosm Experiments Reveal Asian Dust Deposition Stimulates Growth and Reduces Diversity in Bacterioplankton of the China Seas

IF 1.3 4区 环境科学与生态学 Q3 ECOLOGY Ecoscience Pub Date : 2019-12-26 DOI:10.1080/11956860.2019.1681090
Rui Hou, Xi Chen, Kui-ran Li, Huiwang Gao, Yang-Guo Zhao
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引用次数: 1

Abstract

ABSTRACT Dust deposition is considered an important source of many bioavailable nutrients to the marine environment. Nutritional status is the main factor regulating bacterioplankton growth, and thus it is important to study the effects of dust deposition. Microcosm experiments with dust aerosol addition were performed using surface water from the South China Sea (SC) for 12 days and southern Yellow Sea (SY) for 10 days. After incubation, the bacterial biomass in microcosms increased 10.82-fold and 2.22–3.32-fold under dust addition, in SC and SY respectively. Bacterial growth was also stimulated by dust aerosol, indicated by increased and more effcient heterotrophic secondary production. In addition, bacterial community structures were simplified by dust aerosol in both study areas. Alpha- and gamma-proteobacteria were the predominant bacteria in the microcosms following dust addition in SC, whereas alpha- and delta-proteobacteria were the main bacteria in SY. These results demonstrate that dust deposition regulates growth and community structure of marine bacteria in SC and SY by promoting phytoplankton growth.
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微观实验揭示亚洲粉尘沉积刺激了中国海域浮游细菌的生长并降低了其多样性
灰尘沉积被认为是海洋环境中许多生物可利用营养物质的重要来源。营养状况是调节浮游细菌生长的主要因素,因此研究粉尘沉积的影响具有重要意义。利用南海(SC)和南黄海(SY)的地表水进行了为期12天的沙尘气溶胶添加微观实验。培养后,在添加灰尘的情况下,SC和SY中微宇宙中的细菌生物量分别增加了10.82倍和2.22–3.32倍。灰尘气溶胶也刺激了细菌的生长,这表明异养二次生产增加且更有效。此外,这两个研究区域的细菌群落结构都被气溶胶简化了。在SC中添加灰尘后的微宇宙中,α和γ蛋白细菌是主要细菌,而α和δ蛋白细菌是SY中的主要细菌。这些结果表明,灰尘沉积通过促进浮游植物生长来调节SC和SY中海洋细菌的生长和群落结构。
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来源期刊
Ecoscience
Ecoscience 环境科学-生态学
CiteScore
2.80
自引率
0.00%
发文量
13
审稿时长
>36 weeks
期刊介绍: Écoscience, is a multidisciplinary journal that covers all aspects of ecology. The journal welcomes submissions in English or French and publishes original work focusing on patterns and processes at various temporal and spatial scales across different levels of biological organization. Articles include original research, brief communications and reviews.
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