scholarly journals Production Rate of Planktonic Bacteria in the North Basin of Lake Biwa, Japan †

1987 ◽  
Vol 53 (12) ◽  
pp. 2872-2882 ◽  
Author(s):  
Toshi Nagata
Keyword(s):  
Production Rate ◽  
Lake Biwa ◽  
The North ◽  
Planktonic Bacteria

scholarly journals Increasing benthic vent formation: a threat to Japan’s ancient lake

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Michio Kumagai ◽  
Richard D. Robarts ◽  
Yasuaki Aota
Keyword(s):  
Lake Biwa ◽  
Autonomous Underwater Vehicle ◽  
Tohoku Earthquake ◽  
Water Source ◽  
Tectonic Activity ◽  
Drinking Water Source ◽  
Sudden Increase ◽  
The North ◽  
Slow Earthquakes ◽  
Near Future

AbstractAn autonomous underwater vehicle (AUV) was deployed in Lake Biwa from 2000 to 2012. In December 2009, ebullition of turbid water was first found in the deepest area (> 90 m) of the North Basin. Follow-up investigations in April and December 2010 and January 2012 confirmed the existence of benthic vents similar to the vents observed in other deep lakes. Importantly, vent numbers per unit travel distance in Lake Biwa dramatically increased from only two vents (0.37 vents km−1) in December 2009 to 54 vents (5.28 vents km−1) in January 2012, which could be related to recent tectonic activity in Japan, e.g., the M9.1 Tohoku earthquake in March 2011 and slow earthquakes along the Nankai Trough from 2006 to 2018. Continuous back-up investigations from 2014 to 2019 revealed additional benthic vents in the same area. The sudden increase in benthic vent activity (liquid and gaseous ebullitions) have significant potential to alter lake biogeochemistry and, ultimately, degrade Japan’s major drinking water source and may be a harbinger of major crustal change in the near future.

Seasonal changes in carbon and nitrogen productivity in the north basin of Lake Biwa, Japan

2006 ◽  
Vol 29 (4) ◽  
pp. 1913-1920 ◽  
Author(s):  
Osamu Mitamura ◽  
Hiroto Maeda ◽  
Yasushi Seike ◽  
Kunio Kondo ◽  
Naoshige Goto ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Lake Biwa ◽  
Carbon And Nitrogen ◽  
The North ◽  
Nitrogen Productivity

The Carrack Field, Blocks 49/14b, 49/15a and 49/15b, UK North Sea

2020 ◽  
Vol 52 (1) ◽  
pp. 119-130 ◽  
Author(s):  
R. Rieu ◽  
R. J. Porter
Keyword(s):  
Production Rate ◽  
North Sea ◽  
The South ◽  
Production Time ◽  
Water Contact ◽  
Southern North Sea ◽  
The North ◽  
Current Production ◽  
Main Fault

AbstractThe Carrack Field, located in the Southern North Sea Blocks 49/14b and 49/15a, has of the order or 15 bcm (530 bcf) gas initially in place and is operated by Shell UK Ltd. The field consists of a pop-up structure in the south of the field and extends to the north with a gently-dipping monoclinal structure. The reservoir comprises sandstones of the Permian Silverpit and Leman Sandstone formations, which contain c. 85% of the in-place resources. The quality of the reservoir decreases rapidly to the north. Gas is also produced from Carboniferous sandstones of late Duckmantian (Westphalian B)–Bolsovian (Westphalian C) age.Initially, the field was in pressure communication both laterally and vertically with a single gas–water contact. During production time, however, the three main fault blocks behaved independently, and decimetre-thick shale intervals acted as vertical baffles between the sandstone units.The Carrack Field has been in production since 2003 and is developed by a single platform with seven mainly deviated wells. The current production rate is c. 0.7 MMm3/day (25 MMscfgd). Until the end of field life in the 2030s, the field is expected to produce gas of the order of a few bcm. The main remaining opportunity is the undeveloped Carrack West compartment.

scholarly journals Determination of Total Protein Content of Bacterial Cells by SYPRO Staining and Flow Cytometry

1999 ◽  
Vol 65 (7) ◽  
pp. 3251-3257 ◽  
Author(s):  
Mikhail V. Zubkov ◽  
Bernhard M. Fuchs ◽  
Heike Eilers ◽  
Peter H. Burkill ◽  
Rudolf Amann
Keyword(s):  
Flow Cytometry ◽  
Protein Content ◽  
Total Protein ◽  
Total Protein Content ◽  
Bacterial Cells ◽  
Protein Fluorescence ◽  
The North ◽  
Planktonic Bacteria ◽  
Different Temperatures ◽  
Protein Cell

ABSTRACT An assay has been developed for measuring protein biomass of marine planktonic bacteria by flow cytometry. The method was calibrated by using five species of Bacteria (an Arcobactersp., a Cytophaga sp., an Oceanospirillum sp., aPseudoalteromonas sp., and a Vibrio sp.) recently isolated from seawater samples and grown in culture at different temperatures. The intensity of SYPRO-protein fluorescence of these bacteria strongly correlated with their total protein content, measured by the bicinchoninic acid method to be in the range of 60 to 330 fg of protein cell−1(r 2 = 0.93, n = 34). According to the calibration, the mean biomass of planktonic bacteria from the North Sea in August 1998 was 24 fg of protein cell−1.

Observation of snow water equivalent in the North catchment area of Lake Biwa

2011 ◽  
Vol 16 (3) ◽  
pp. 215-221 ◽  
Author(s):  
Iwaki Maho ◽  
Hida Yoshifumi ◽  
Ueno Ken’ichi ◽  
Saijyou Mayumi
Keyword(s):  
Catchment Area ◽  
Snow Water Equivalent ◽  
Lake Biwa ◽  
The North ◽  
Snow Water

Recent Cyprididae and Ilyocyprididae (Crustacea: Ostracoda) from Lake Biwa, Japan, including a summary of the lake’s ostracod fauna

Zootaxa ◽  
2011 ◽  
Vol 2874 (1) ◽  
pp. 1 ◽  
Author(s):  
ROBIN J. SMITH ◽  
HORST JANZ ◽  
ICHIRO OKUBO
Keyword(s):  
New Record ◽  
Lake Biwa ◽  
New Records ◽  
First Record ◽  
Ancient Lake ◽  
The North ◽  
The Family ◽  
The Mean ◽  
Ostracod Species

Sampling between 1999 and 2007 of the recent ostracod fauna of Lake Biwa, an ancient lake located in Japan, produced ten Cyprididae and one Ilyocyprididae species. One Cyprididae species, belonging to the genus Ilyodromus is described herein, Ilyodromus intermedius Okubo n. sp., and Bradleytriebella lineata (Victor & Fernando, 1981c) is redescribed. One Cyprididae species is a new record for Japan, namely Stenocypris malayica Victor & Fernando, 1981a, while seven others are new records for Lake Biwa. The family Ilyocyprididae is represented by only one species in Lake Biwa, Ilyocypris salebrosa Stepanaitys, 1960. The Lake Biwa population of this species is the first record of males and they are described in this paper. Including this study, forty ostracod species have now been reported from Lake Biwa. Most species (70%) were found at depths of less than 1 meter. Only four species were found below 44 m, the mean depth of the north basin.

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