Variation in seagrass meadow respiration measured by aquatic eddy covariance

Variation in seagrass meadow respiration measured by aquatic eddy covariance
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通过水生涡度协方差测量海草草甸呼吸的变化

DOI:
10.1002/lol2.10276
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发表时间:
2022
影响因子:
7.8
通讯作者:
Berg, Peter
Berg, Peter
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Juska, Ieva;Berg, Peter

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呼吸作用、初级生产总值和净生态系统代谢的准确每日代谢估算对于评估植被海岸生态系统的健康和蓝碳贡献是必要的。使用我们的数据库的2115小时底栖氧(O2)通量测量水生涡度协方差,我们研究呼吸aZostera marinaseagrass草甸通过昼夜变化,以及这如何影响通常进行代谢估计。呼吸线性下降了29%,通过夜间和相应的线性增加白天呼吸加上生产所描述的标准光合作用-辐照曲线准确地预测测得的白天O2通量。许多研究质疑代谢估计中广泛使用的假设,即夜间和白天的呼吸是恒定和相等的。然而,如果呼吸可以通过线性关系近似,那么如果估计值基于完整的24小时流量数据记录,则计算每日代谢数量的标准平均值仍然有效。
Accurate daily metabolic estimates of respiration, gross primary production, and net ecosystem metabolism are necessary to assess ecosystem health and blue carbon contributions of vegetated coastal ecosystems. Using our database of 2115 hourly benthic oxygen (O2) fluxes measured by aquatic eddy covariance, we examine how respiration for aZostera marinaseagrass meadow varies through night and day, and how this affects commonly performed metabolic estimates. Respiration decreased linearly by 29% through the night and a corresponding linear increase in daytime respiration coupled with production described by a standard photosynthesis–irradiance curve accurately predicted measured daytime O2fluxes. Many studies have questioned the widely used assumption in metabolic estimates that nighttime and daytime respiration are constant and equal. However, if respiration can be approximated as we found here by linear relationships, standard means for calculating daily metabolic numbers remain valid if estimates are based on full 24‐h records of flux data.
通过涡流相关测量沿着大叶藻(Zostera marina)定植梯度的生态系统代谢
DOI: --
发表时间: 2014
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