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In situ measurements of benthic oxygen fluxes in Hui-quan Bay of Qingdao by eddy correlation techniques:short term pattern variations in gravel beach

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Marine Science Bulletin 2020年第2期22卷 36-52页

作者： CUI Shanggong YU Xinsheng ZHAO Guangtao National Marine Data and Information Service Tianjin 300171China Key Lab.of Submarine Geosciences and Prospecting Techniques MOECollege of Marine GeosciencesOcean University of ChinaQingdao266100Shandong provinceChina

The oxygen fluxe across the sediment-water interface(SWI)in coastal region is a key measure to fully understand the regulation of biogeochemical cycles in an aquatic ***,studies on fluxes of dissolved oxygen in gravel beach are limited,because of the difficulty in sample collection and instrumentations *** this study,benthic oxygen fluxes across rocky substratum in an intertidal zone of Huiquan Bay was estimated by using noninvasive eddy correlation techniques.A total of 10 burst measurements were *** oxygen flux fluctuated from-5.7888±2.6 to+49.3344±2.6 mmol O2 m-2/d were *** cospectra analysis showed that the oxygen flux at the frequency band between 0.093 and 0.279 Hz(at a period from 3.58 to 10.75 s)contributed 50.19%to the total spectrum on *** results showed that the major contribution band moved to the high frequency region gradually and reached a steady state with increasing tidal *** is demonstrated that wave movement and wave breaking interaction resulted in the change of oxygen flux between gravel beach and shallow waters at the start and the end of a rising tide period,*** eddy correlation techniques offer an efficient means for flux measurement over a gravel or mixed sand and gravel beaches.

关键词： sediment-water interface(SWI) oxygen fluxes eddy correlation gravel beaches in situ measurement

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Application of Non-invasive Microsensing System to Simultaneously Measure Both H^＋ and O2 fluxes Around the Pollen Tube

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Journal of Integrative Plant Biology 2006年第7期48卷 823-831页

作者： Yue Xu Tong Sun Li-Ping Yin College of Life Sciences Capital Normal University Beijing 100037 China Younger USA Company Cary NC 27513 USA Vibrating Probe Facility Biology Department University of Massachusetts at Amherst MA 01003 USA

Various Ionic and molecular activities in the extraceUular environment are vital to plant cell physiological processes. A noninvasive microsensing system （NMS） based on either the scanning ion-selective electrode technique （SIET） or the scanning polarographlc electrode technique （SPET） is able to obtain information regarding the transportation of various Ions/molecules in Intact samples under normal physiological conditions. The two-probe simultaneous test system （2STS） Is an Integrated system composed of SIET, SPET, and a Xu-Kunkel sampling protocol. In the present study, 2STS was able to simultaneously measure fluxes of H^＋ and O2 of the Uly （Lillum Iongiflorum Thunb. cv. Ace） pollen tube while avoiding interference between the two probes. The results Indicate that the proton fluxes were effluxes, whereas the oxygen fluxes were Influxes, and they were closely correlated to each other surrounding the constitutive alkaline band region. Specifically, when the proton effluxes increased, the oxygen Influxes also increased. Therefore, the hypothesis of condensed active mitochondria existing in the alkalized area of the pollen tube proposed by Hepler＇s group is supported.

关键词： non-invasive microsensing system (NMS) oxygen fluxes pollen tube proton fluxes scanning ion-selective electrode technique (SIET) scanning polarographic electrode technique (SPET) two-probe simultaneous test system (2STS).

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