Studies of Microzooplankton Grazing on Phytoplankton in Tieshan Harbor, Guangxi and Shenhu Bay, Fujian

2010年5月和8月，应用稀释法，研究了广西铁山港和福建深沪湾两个海域不同粒径浮游植物的生长率、微型浮游动物对浮游植物的摄食率，估算了微型浮游动物的日摄食量、微型浮游动物对浮游植物现存量和初级生产力的摄食压力。研究旨在揭示微型浮游动物的摄食对浮游植物群落结构的影响以及探讨不同海域微食物网的碳流通量和流向。 主要成果如下： 1.铁山港海域表层水体中，浮游植物的生长率和微型浮游动物的摄食率的变化范围都很大。4月份，浮游植物的生长率为0.36~1.12d-1，微型浮游动物的摄食率为0.25~0.68d-1，相当于每天摄食浮游植物现存量的32.35%~151.07%和初级生产力的73.47%~73...Microzooplankton grazing on coastal phytoplankton was determined by the dilution technique in April and August 2010 at three station located in Tieshan and Shenhu Harbor, respectively. The carbon flux consumed by microzooplankton and the secondary production of microzooplankton were estimated in order to examine the impact of microzooplankton grazing on phytoplankton communities. The major result...学位：理学硕士院系专业：海洋与环境学院海洋学系_海洋生物学学号：2242008115149

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies