Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Spatiotemporal changes in chlorophyll a concentration in the inner area of Tokyo Bay from 2016 to 2020

  1. Jiang Q, Ando Y, Ueno Y, Yasuda M, Tanaka A, Yasui-Tamura S, Hashihama F, Kagami M, Katano T , 2024.09

  Journal of Oceanography

• 沿岸域教育実践者の「悩み」ー東京湾岸ミュージアム懇談会の談話からー

  2. 川辺みどり，尾形歌穂，片野俊也，河野博，小堀信幸，小山文大，鈴木秀和，平野晴野，古川恵太，本間友，丸山啓太 , 2024.07

  沿岸域学会誌

• Seasonal changes in Skeletonema species in the sediment of Tokyo Bay evaluated with real-time PCR assays

  Liu Yakun, Fuka Furuoka, Yuki Yoshinaka, Kohei Mizobata, Katsuhide Yokoyama, Toshiya Katano , 2024

  Plankton and Benthos Research

• Dual-laser flow cytometry reveals Synechococcus pigment type diversity

  Tanaka A, Hashihama F, Katano T , 2024

  Marine Ecology Progress Series

• Nutrient limitation on phytoplankton growth and abundance in the innermost area of Tokyo Bay

  日髙瞭，西山健太，吉野健児，安井沙織，橋濱史典，片野俊也 , 2023.08

  Bulletin on Coastal Oceanography

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Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• The evaluation of the effect of catchment geology and groundwater recharge characteristics on river water quality and red tide formation in estuarine areas.

  Project Period (FY)： 2023/04  -  2027/03  Investigator(s): 梅澤有

  Grant-in-Aid for Scientific Research(B)  Co-Investigator  23K25421 

• 沿岸域におけるSkeletonema属珪藻の群集構造解析

  Project Period (FY)： 2016/04  -  2019/03  Investigator(s): 片野 俊也

  Grant-in-Aid for Scientific Research(C)  Principal Investigator  16K07508 

• Development of a qualitative method for identifying species of the diatom genus Skeletonema and elucidation of the physiological and ecological characteristics of each species

  Project Period (FY)： 2014/04  -  2017/03  Investigator(s): Yamada Machiko

  Grant-in-Aid for Scientific Research(C)  Co-Investigator  26450248 

  Diatoms of the genus Skeletonema are important primary producers in aquatic ecosystems; some adversely impact Nori culture. In 2005 and 2007 Sarno et al. classified each of 11 Skeletonema species and established a method to distinguish them. Their method is reliable except for classification of S. dohrnii and S. marinoi, which are cryptic species; however, it is complicated, time-consuming, expensive, and non-quantitative. To make a better method, we developed a method based on quantitative real-time PCR (qPCR); the rDNA primers were designed for the ten species that occur in Japanese coastal waters. The use of qPCR allowed us to identify not only vegetative cells in the water column but also resting cells in the sediments. We successfully identified dominant species found by conventional methods as well as less abundant co-occurring species. Our experience has been that qPCR is most frequently the best method for identifying Skeletonema species in both the water column and sediment.

• Monitoring of nitrate concentration using spectrophotometer and research on the trigger of population development the diatom in the winter season of the Ariake Sea

  Project Period (FY)： 2013/04  -  2016/03  Investigator(s): katano toshiya

  Grant-in-Aid for Scientific Research(C)  Principal Investigator  25450259 

  Nitrate concentrations determined by an ultraviolet specrtophotometer were corrected with data obtained with a conductivity, temperature, and depth profiler (CTD) equipped with turbidity sensor for the better estimation of nitrate in an embayment. Monitoring of nitrate concentration using the spectrophotometer revealed that nitrate concentration becomes high (e.g. >0.07 mM) at the low tide during spring tide.
  The red tide developing process was monitored using CTD continuous monitoring and field observation using boats. Red tide occurred in late February during spring tide. Difference in the density of seawater in the water column was not important to develop the population. River discharge might be important to determine the size of the population. Nitrate concentration should be further monitored to clarify the developing process of the red tide. Data obtained with the spectrophotometer is released real time on the web site (http://www.ilt.saga-u.ac.jp/aripro/tower/nutrient.html).

• Material dynamics and ecological change in extra long water system, Hovosgol-Baikal-Yenisei area

  Project Period (FY)： 2009  -  2012  Investigator(s): SUGIYAMA Masahito

  Grant-in-Aid for Scientific Research(A)  Principal Investigator  21255002 

  We conducted a limnological field survey in the upper half of Hovosgol - Baikal - Yenisey water system (length: 5500 km) from Lake Hovosgol (Mongolia) to Lake Ust-Ilimsk (Russia). Therefore, almost whole area of the water system was surveyed by the present work and the previous research with same research title during from 2006 to 2008 promoted with the Grants-in-Aid Scientific Research-KAKENHI (Scientific Research (A) Overseas Academic Research, 18255001). Water quality and ecological system of micro-organisms were elucidated to be changed with flowing down of water in rivers and water stagnation in lakes in the water system. Its tendency was markedly observed around the source of this water system and the mouth of the main river flowing into a large artificial lake.

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Lesson Subject 【 display / non-display 】