Changes in CO2 concentration and degassing of eutrophic urban lakes associated with algal growth and decline

富营养化 水华 布鲁姆 环境科学 营养物 水槽(地理) 二氧化碳 浮游植物 叶绿素a 碳循环 生态学 环境化学 藻类 生态系统 生物 化学 植物 地理 地图学
作者
Liuqing Zhang,Y. Jun Xu,Siyue Li
出处
期刊:Environmental Research [Elsevier BV]
卷期号:237: 117031-117031 被引量:4
标识
DOI:10.1016/j.envres.2023.117031
摘要

Urban lakes are numerous in the world, but their role in carbon storage and emission is not well understood. This study aimed to answer the critical questions: How does algal growing season influence carbon dioxide concentration (cCO2) and exchange flux (FCO2) in eutrophic urban lakes? We investigated trophic state, seasonality of algal productivity, and their association with CO2 dynamics in four urban lakes in Central China. We found that these lightly-to moderately-eutrophic urban lakes showed a shifting pattern of CO2 source-sink dynamics. In the non-algal bloom phase, the moderately-eutrophic lakes outgassed on average of 12.18 ± 24.37 mmol m-2 d-1 CO2; but, during the algal bloom phase, the lakes sequestered an average 1.07 ± 6.22 mmol m-2 d-1 CO2. The lightly-eutrophic lakes exhibited lower CO2 emission in the algal bloom (0.60 ± 10.24 mmol m-2 d-1) compared to the non-algal bloom (3.84 ± 12.38 mmol m-2 d-1). Biological factors such as Chl-a (chlorophyll a) and AOU (apparent oxygen utilization), were found to be important factors to potentially affect the shifting pattern of lake CO2 source-sink dynamics in moderately-eutrophic lakes, explaining 48% and 34% of the CO2 variation in the non-algal and algal bloom phases, respectively. Moreover, CO2 showed positive correlations with AOU, and negative correlations with Chl-a in both phases. In the lightly-eutrophic lakes, biological factors explained a higher proportion of CO2 variations (29%) in the non-algal bloom phase, with AOU accounting for 19%. Our results indicate that algal growth and decline phases largely affect dissolved CO2 level and exchange flux by regulating in-lake respiration and photosynthesis. Based on the findings, we conclude that shallow urban lakes can act as both sources and sinks of CO2, with algal growth seasonality and trophic state playing pivotal roles in controlling their carbon dynamics.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
我是老大应助王淳采纳,获得10
刚刚
刚刚
刚刚
美满水蜜桃关注了科研通微信公众号
1秒前
1秒前
ZZ发布了新的文献求助10
1秒前
烟花应助儒雅随和的二狗采纳,获得10
1秒前
1秒前
byron发布了新的文献求助10
1秒前
冬雾发布了新的文献求助20
1秒前
1秒前
imi应助大力的猕猴桃采纳,获得10
1秒前
希望天下0贩的0应助yulee采纳,获得10
2秒前
2秒前
2秒前
wenwenTang发布了新的文献求助10
2秒前
Jasper应助瞬华采纳,获得10
2秒前
misunderstanding完成签到,获得积分10
4秒前
稳重的绝施关注了科研通微信公众号
4秒前
SciGPT应助Here采纳,获得40
4秒前
nns发布了新的文献求助10
4秒前
5秒前
yflag应助单纯的爆米花采纳,获得20
6秒前
6秒前
6秒前
搬砖发布了新的文献求助10
6秒前
Hello应助搞笑5次采纳,获得10
7秒前
小学生发布了新的文献求助30
7秒前
7秒前
韩晚渔完成签到,获得积分10
8秒前
养恩完成签到,获得积分10
8秒前
neil完成签到,获得积分10
8秒前
345发布了新的文献求助10
8秒前
8秒前
美满花生发布了新的文献求助10
8秒前
朴志晟完成签到 ,获得积分20
9秒前
9秒前
夏禾发布了新的文献求助10
9秒前
keyan发布了新的文献求助10
10秒前
Demon_1996完成签到,获得积分20
10秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3974602
求助须知:如何正确求助?哪些是违规求助? 3519026
关于积分的说明 11196787
捐赠科研通 3255127
什么是DOI,文献DOI怎么找? 1797693
邀请新用户注册赠送积分活动 877100
科研通“疑难数据库(出版商)”最低求助积分说明 806130