Estimation of Net Ecosystem Metabolism of Seagrass Meadows in the Coastal Waters of the East Sea and Black Sea using the Noninvasive Eddy Covariance Technique SCIE SCOPUS KCI

Cited 3 time in WEB OF SCIENCE Cited 4 time in Scopus
Title
Estimation of Net Ecosystem Metabolism of Seagrass Meadows in the Coastal Waters of the East Sea and Black Sea using the Noninvasive Eddy Covariance Technique
Author(s)
Lee, Jae Seong; Kang, Dong-Jin; Hineva, Elitsa; Slabakova, Violeta; Todorova, Valentina; Park, Jiyoung; Cho, Jin-Hyung
KIOST Author(s)
Lee, Jae Seong(이재성)Kang, Dong Jin(강동진)Cho, Jin Hyung(조진형)
Publication Year
2017-06
Abstract
We measured the community-scale metabolism of seagrass meadows in Bulgaria (Byala [BY]) and Korea (Hoopo Bay [HP]) to understand their ecosystem function in coastal waters. A noninvasive in situ eddy covariance technique was applied to estimate net O-2 flux in the seagrass meadows. From the highquality and high-resolution time series O-2 data acquired over > 24 h, the O-2 flux driven by turbulence was extracted at 15-min intervals. The spectrum analysis of vertical flow velocity and O-2 concentration clearly showed well-developed turbulence characteristics in the inertial subrange region. The hourly averaged net O-2 fluxes per day ranged from-474 to 326 mmol O-2 m(-2) d(-1) (-19 +/- 41 mmol O-2 m(-2) d(-1)) at BY and from-74 to 482 mmol O2 m-2 d-1 (31 +/- 17 mmol O-2 m(-2) d(-1)) at HP. The net O-2 production rapidly responded to photosynthetically available radiation (PAR) and showed a good relationship between production and irradiance (P-I curve). The hysteresis pattern of P-I relationships during daytime also suggested increasing heterotrophic respiration in the afternoon. With the flow velocity between 3.30 and 6.70 cm s(-1), the community metabolism during daytime and nighttime was significantly increased by 20 times and 5 times, respectively. The local hydrodynamic characteristics may be vital to determining the efficiency of community photosynthesis. The net ecosystem metabolism at BY was estimated to be-17 mmol O-2 m(-2) d(-1), which was assessed as heterotrophy. However, that at HP was 36 mmol O-2 m(-2) d(-1), which suggested an autotrophic state.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1227
DOI
10.1007/s12601-017-0032-5
Bibliographic Citation
OCEAN SCIENCE JOURNAL, v.52, no.2, pp.243 - 256, 2017
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Subject
DIFFUSIVE BOUNDARY-LAYERS; EELGRASS ZOSTERA-MARINA; SEDIMENT SUSPENSION; AQUATIC SEDIMENTS; OXYGEN DYNAMICS; PHOTOSYNTHESIS; EXCHANGE; LIGHT; BEDS; FLUX
Keywords
eddy covariance; noninvasive measurement; oxygen flux; carbon cycle; eelgrass meadow; net ecosystem metabolism
Type
Article
Language
English
Document Type
Article
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Related Researcher
Research Interests

Marine Geology,Marine Geochemistry,Marine Security and Safety Research,해양지질,해양지화학,해양방위

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