气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and marine phytoplankton and bacterial metabolism during a bloom

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.901015
	Seawater carbonate chemistry and marine phytoplankton and bacterial metabolism during a bloom
	Huang; Yibin; Liu; Xin; Laws; Edward A; Chen; Bingzhang; Li; Yan; Xie; Yuyuan; Wu; YaPing; Gao; Kunshan; Huang; Bangqin
发布日期	2019-05-06
数据集类型	dataset
英文关键词	Biomass/Abundance/Elemental composition ; Coast and continental shelf ; Entire community ; Field experiment ; Mesocosm or benthocosm ; North Pacific ; Other metabolic rates ; Pelagos ; Primary production/Photosynthesis ; Respiration ; Temperate
英文简介	Increases of atmospheric CO2 concentrations due to human activity and associated effects on aquatic ecosystems are recognized as an environmental issue at a global scale. Growing attention is being paid to CO2 enrichment effects under multiple stresses or fluctuating environmental conditions in order to extrapolate from laboratory-scale experiments to natural systems. We carried out a mesocosm experiment in coastal water with an assemblage of three model phytoplankton species and their associated bacteria under the influence of elevated CO2 concentrations. Net community production and the metabolic characteristics of the phytoplankton and bacteria were monitored to elucidate how these organisms responded to CO2 enrichment during the course of the algal bloom. We found that CO2 enrichment (1000 μatm) significantly enhanced gross primary production and the ratio of photosynthesis to chlorophyll a by approximately 38% and 39%, respectively, during the early stationary phase of the algal bloom. Although there were few effects on bulk bacterial production, a significant decrease of bulk bacterial respiration (up to 31%) at elevated CO2 resulted in an increase of bacterial growth efficiency. The implication is that an elevation of CO2 concentrations leads to a reduction of bacterial carbon demand and enhances carbon transfer efficiency through the microbial loop, with a greater proportion of fixed carbon being allocated to bacterial biomass and less being lost as CO2. The contemporaneous responses of phytoplankton and bacterial metabolism to CO2 enrichment increased net community production by about 45%, an increase that would have profound implications for the carbon cycle in coastal marine ecosystems.
空间范围	Latitude: 24.520000 * Longitude: 118.200000
时间范围	2013-06-15T00:00:00 - 2013-06-15T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215868
推荐引用方式 GB/T 7714	Huang,Yibin,Liu,et al. Seawater carbonate chemistry and marine phytoplankton and bacterial metabolism during a bloom.2019-05-06.https://doi.org/10.1594/PANGAEA.901015.