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You searched for: Subject term sediments Remove constraint Subject term: sediments Subject term Japan Remove constraint Subject term: Japan
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1. A 7500-year history of intentional fires and changing vegetation on the Soni Plateau, Central Japan, reconstructed from macroscopic charcoal and pollen records within mire sediment

Author:
Jun Inoue; Ryo Nishimura; Hikaru Takahara
Source:
Quaternary international 2012 v.254 no. pp. 12-17
ISSN:
1040-6182
Subject:
Abies; Castanea; Fagus; Poaceae; Quercus; broadleaved evergreens; charcoal; climate change; deciduous forests; fires; grasslands; humans; plateaus; pollen; sediment deposition; sediments; Japan
Abstract:
... Macroscopic charcoal and pollen in mire sediments from the Soni Plateau, Central Japan, were evaluated to clarify intentional fire history and relationship between vegetation transition and anthropogenic fire or climate change. The sediments deposited in recent centuries, when fire probably occurred every year, include a number density of macroscopic charcoal fragments exceeding 100 fragments/cm³. ...
DOI:
10.1016/j.quaint.2010.08.012

2. A Complete Terrestrial Radiocarbon Record for 11.2 to 52.8 kyr B.P.

Author:
Christopher Bronk Ramsey; Richard A. Staff; Charlotte L. Bryant; Fiona Brock; Hiroyuki Kitagawa; Johannes van der Plicht; Gordon Schlolaut; Michael H. Marshall; Achim Brauer; Henry F. Lamb; Rebecca L. Payne; Pavel E. Tarasov; Tsuyoshi Haraguchi; Katsuya Gotanda; Hitoshi Yonenobu; Yusuke Yokoyama; Ryuji Tada; Takeshi Nakagawa
Source:
Science 2012 v.338 no.6105 pp. 370-374
ISSN:
0036-8075
Subject:
carbon; carbon dioxide; groundwater; inventories; lakes; plants (botany); radiocarbon dating; radionuclides; seawater; sediments; Japan
Abstract:
... Dating Carbon Radiocarbon dating is the best way to determine the age of samples that contain carbon and that are younger than ∼50,000 years, the limit of precision for the method. There are several factors that complicate such age determinations, however, some of the most important of which include variability of the ¹⁴C production in the atmosphere (which affects organic samples whose radiocarbo ...
DOI:
10.1126/science.1226660

3. A Megathrust earthquake as source of a Pre-Colombian tsunami in Lesser Antilles: Insight from sediment deposits and tsunami modeling

Author:
L. Cordrie; N. Feuillet; A. Gailler; M. Biguenet; E. Chaumillon; P. Sabatier
Source:
Earth-science reviews 2022 v.228 pp. 104018
ISSN:
0012-8252
Subject:
Japan; altitude; earthquakes; geodesy; historical records; sediments; shrublands; subduction; tectonics; tsunamis; Antigua and Barbuda; Caribbean; Indonesia; Puerto Rico
Abstract:
... No megathrust earthquake similar to the Magnitude class 9 events in Sumatra in 2004 or in Japan in 2011 was firmly reported at the Lesser Antilles subduction zone. The largest known tsunamis followed either a strong intraplate earthquake (1867, Virgin Islands) or were transoceanic due to the 1755 Lisbon earthquake. In this region, where the convergence rate between the American and Caribbean plate ...
DOI:
10.1016/j.earscirev.2022.104018

4. A comparative study of riverine 137Cs dynamics during high-flow events at three contaminated river catchments in Fukushima

Author:
Takuya Niida; Yoshifumi Wakiyama; Hyoe Takata; Keisuke Taniguchi; Honoka Kurosawa; Kazuki Fujita; Alexei Konoplev
Source:
Science of the total environment 2022 v.821 pp. 153408
ISSN:
0048-9697
Subject:
Japan; accidents; cesium radioisotopes; comparative study; environment; inventories; nuclear power; power plants; rain; riparian areas; river water; rivers; seawater; sediments; total suspended solids; watersheds
Abstract:
... This study presents the temporal variations in riverine ¹³⁷Cs concentrations and fluxes to the ocean during high-flow events in three coastal river catchments contaminated by the Fukushima Daiichi Nuclear Power Plant accident. River water samples were collected at points downstream in the Niida, Ukedo, and Takase Rivers during three high-flow events that occurred in 2019–2020. Variations in both t ...
DOI:
10.1016/j.scitotenv.2022.153408

5. A fossil aphid gall from the middle Pleistocene sediment in Hyogo Prefecture, western Japan

Author:
Minoru Tsukagoshi; Ken Sawada; Shin‐ichi Akimoto
Source:
Entomological science 2019 v.22 no.3 pp. 270-274
ISSN:
1343-8786
Subject:
Nipponaphis; Pleistocene epoch; fossils; insects; sediments; Japan
Abstract:
... We described the external morphology of a fossil insect gall collected from the middle Pleistocene sediment in the Osaka Group of Nishinomiya City, Hyogo Prefecture, western Japan. The fossil was well preserved without major compression and was identified as a gall induced by an aphid species of the genus Nipponaphis (Nipponaphidini: Hormaphidinae: Aphididae), based on its external morphology. Thi ...
DOI:
10.1111/ens.12370

6. A late Miocene methane-seep deposit bearing methane-trapping silica minerals at Joetsu, central Japan

Author:
Yusuke Miyajima; Yumiko Watanabe; Yukio Yanagisawa; Kazutaka Amano; Takashi Hasegawa; Norimasa Shimobayashi
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2016 v.455 pp. 1-15
ISSN:
0031-0182
Subject:
Bacillariophyceae; Bivalvia; Gastropoda; Miocene epoch; aragonite; biomarkers; bubbles; carbon; carbon dioxide; fossils; gas hydrate; lipids; methane; oxidation; pH; quartz; sediments; seepage; stable isotopes; Japan
Abstract:
... The modern Japan Sea is characterized by active methane seeps associated with gas hydrates, but their ancient counterparts are not fully understood. This study describes a newly discovered methane-seep carbonate block, the ‘Nakanomata Seep Deposit’, from the upper Miocene Nodani Formation in Joetsu City, central Japan. The age of this deposit is constrained to 7.5–6.5Ma based on its fossil diatom ...
DOI:
10.1016/j.palaeo.2016.05.002

7. A model of ⁹⁰Sr distribution in the sea near Daya Bay Nuclear Power Plant in China

Author:
Jingyu Wang; Hongwei Fang; Guojian He; Lei Huang
Source:
Frontiers of environmental science & engineering 2014 v.8 no.6 pp. 845-853
ISSN:
2095-2201
Subject:
adsorption; desorption; environmental impact; microstructure; models; nuclear power; power plants; seawater; sediments; suspended sediment; China; Japan; South China Sea
Abstract:
... The impact on the environment of radionuclide release from nuclear power plants has attracted increased attention, especially after the accident at Fukushima Daiichi Nuclear Power Plant in Japan. Based on the mechanisms of adsorption/desorption at solid/liquid interfaces and a surface micromorphology model of sediments, a theoretical expression of the distribution coefficient K d is derived. This ...
DOI:
10.1007/s11783-014-0708-3

8. A modeling study on the oceanic dispersion and sedimentation of radionuclides off the coast of Fukushima

Author:
Yuki Kamidaira; Yusuke Uchiyama; Hideyuki Kawamura; Takuya Kobayashi; Shigeyoshi Otosaka
Source:
Journal of environmental radioactivity 2021 v.238-239 pp. 106724
ISSN:
0265-931X
Subject:
Japan; accidents; adsorption; cesium radioisotopes; clay; coasts; desorption; models; nuclear power; particle size; power plants; radioactivity; seawater; sediments; shear stress
Abstract:
... We developed a three-dimensional prognostic oceanic dispersion model that accounted for the phase transfer of radionuclides between seawater, suspended particles, and seabed sediments with multiscale grain sizes. A detailed hindcast of ¹³⁷Cs in the seabed sediment off the Fukushima coast was conducted to investigate the transfer mechanism of dissolved ¹³⁷Cs derived from the Fukushima Daiichi Nucle ...
DOI:
10.1016/j.jenvrad.2021.106724

9. A multi-proxy palaeolimnological record of the last 16,600 years from coastal Lake Kushu in northern Japan

Author:
Mareike Schmidt; Christian Leipe; Fabian Becker; Tomasz Goslar; Philipp Hoelzmann; Jens Mingram; Stefanie Müller; Rik Tjallingii; Mayke Wagner; Pavel E. Tarasov
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2019 v.514 pp. 613-626
ISSN:
0031-0182
Subject:
Aulacoseira; Bacillariophyceae; Chlorophyta; X-ray fluorescence spectroscopy; cooling; eutrophication; freshwater; freshwater lakes; pollen; sea level; sediments; transgressive segregation; watersheds; Japan
Abstract:
... Based on diatom, aquatic pollen and non-pollen palynomorph (NPP), lake sediment microfacies, and X-ray fluorescence (XRF) analyses we define three main phases of lake basin development including a marshy phase (ca. 16,600–9400 cal. yr BP), lagoon phase (ca. 9400–5900 cal. yr BP) and freshwater lake phase (since ca. 5900 cal. yr BP). Marine influence on the lake system linked to global sea-level ri ...
DOI:
10.1016/j.palaeo.2018.11.010

10. A new approach to evaluate factors controlling elemental sediment–seawater distribution coefficients (Kd) in coastal regions, Japan

Author:
Hyoe Takata; Tatsuo Aono; Keiko Tagami; Shigeo Uchida
Source:
Science of the total environment 2016 v.543 pp. 315-325
ISSN:
0048-9697
Subject:
aluminum; cadmium; calcium; coasts; cobalt; copper; iron; lead; magnesium; manganese; marine environment; mathematical models; molybdenum; nickel; organic matter; oxides; physicochemical properties; potassium; radionuclides; rare earth elements; rubidium; seawater; sediments; sodium; strontium; thorium; uranium; Japan
Abstract:
... In numerical models to simulate the dispersion of anthropogenic radionuclides in the marine environment, the sediment–seawater distribution coefficient (Kd) for various elements is an important parameter. In coastal regions, Kd values are largely dependent on hydrographic conditions and physicochemical characteristics of sediment. Here we report Kd values for 36 elements (Na, Mg, Al, K, Ca, V, Mn, ...
DOI:
10.1016/j.scitotenv.2015.11.034

11. A new radiolarian transfer function for the Pacific Ocean and application to fossil records: Assessing potential and limitations for the last glacial-interglacial cycle

Author:
Iván Hernández-Almeida; Demetrio Boltovskoy; Svetlana B. Kruglikova; Giuseppe Cortese
Source:
Global and planetary change 2020 v.190 pp. 103186
ISSN:
0921-8181
Subject:
autocorrelation; climate; data collection; environmental factors; fossils; latitude; multivariate analysis; sediments; surface water temperature; Bering Sea; Japan; Okhotsk Sea; Pacific Ocean
Abstract:
... Climatic and oceanographic processes in the Pacific Ocean have global implications. Reliable sedimentary proxies in this region are thus necessary to understand the magnitude of past climate variability. Radiolarian assemblages are of particular relevance in some regions of the Pacific Ocean where other proxies are either poorly preserved or are biased towards a specific season. Previously publish ...
DOI:
10.1016/j.gloplacha.2020.103186

12. A new tool for visualising multi-dimensional datasets: an example of fish schools around artificial reefs

Author:
M Kang; T Nakamura; A Hamano
Source:
New Zealand journal of marine and freshwater research 2012 v.46 no.2 pp. 179-190
ISSN:
1175-8805
Subject:
acoustics; artificial reefs; coasts; computer software; data collection; geographic information systems; reefs; schools of fish; sediments; surveys; water temperature; Japan
Abstract:
... We demonstrated a tool for visualising multi-dimensional datasets, using an example of fish schools around artificial reefs off the coast of Shimonoseki, Yamaguchi prefecture, Japan. The datasets included acoustic surveys of fish schools, water temperature data, descriptions of the artificial reefs, sediment data, and bathymetry and coastal line data. These datasets were integrated into geographic ...
DOI:
10.1080/00288330.2011.624525

13. A novel method of surveying submerged landslide ruins: Case study of the Nebukawa landslide in Japan

Author:
Shintaro Yamasaki; Toshitaka Kamai
Source:
Engineering geology 2015 v.186 pp. 28-33
ISSN:
0013-7952
Subject:
acoustics; case studies; coasts; concrete; earthquakes; engineering; equipment; fish; friction; landslides; sediments; surveys; turbulent flow; Japan
Abstract:
... We investigated submerged ruins from the 1923 Nebukawa landslide, which was caused by the 1923 Kanto earthquake. The on-land areas affected by the landslide have been restored and evidence of the landslide is mostly gone, but huge structures that appear to be man-made have been observed by divers on the seafloor near the area of the landslide. We used a fish finder designed for leisure use and oth ...
DOI:
10.1016/j.enggeo.2014.11.010

14. A storm-induced flood and associated nearshore dispersal of the river-derived suspended 137Cs

Author:
Yusuke Uchiyama; Natsuki Tokunaga; Kohei Aduma; Yuki Kamidaira; Daisuke Tsumune; Toshiki Iwasaki; Masatoshi Yamada; Yutaka Tadeda; Takashi Ishimaru; Yukari Ito; Yutaka W. Watanabe; Ken Ikehara; Miho Fukuda; Yuichi Onda
Source:
Science of the total environment 2022 v.816 pp. 151573
ISSN:
0048-9697
Subject:
Japan; coasts; earthquakes; freshwater; marine environment; models; nuclear power; power plants; riparian areas; rivers; sediment transport; sediments; typhoons
Abstract:
... Accidental leakage of radionuclides from the Fukushima Nuclear Power Plant (FNPP1) took place in the aftermath of the catastrophic tsunamis associated with the Great East Japan Earthquake that occurred on March 11, 2011. Significant amount of radionuclides released into the atmosphere were reportedly transported and deposited on land located near FNPP1. The Niida River, Fukushima, Japan, has been ...
DOI:
10.1016/j.scitotenv.2021.151573

15. A teleomorph of the ustilaginalean yeast Moesziomyces antarcticus on barnyardgrass in Japan provides bioresources that degrade biodegradable plastics

Author:
Eiji Tanaka; Motoo Koitabashi; Hiroko Kitamoto
Source:
Antonie van Leeuwenhoek 2019 v.112 no.4 pp. 599-614
ISSN:
0003-6072
Subject:
Echinochloa crus-galli; Pseudozyma antarctica; biodegradability; lakes; lipids; phylogeny; plant pathogenic fungi; plastics; sediments; teleomorphs; teliospores; yeasts; Antarctica; Japan
Abstract:
... The basidiomycetous yeast Moesziomyces antarcticus (often cited as Pseudozyma antarctica), originally isolated from a sediment sample obtained from Lake Vanda in Antarctica, was asexually typified but closely related to the smut fungus Moesziomyces bullatus (Ustilaginales). We found a smut fungus on an ovary of barnyardgrass (Echinochloa crus-galli) in Japan, which had been identified as M. bullat ...
DOI:
10.1007/s10482-018-1190-x

16. A water-sediment screening tool for measuring biodegradation of organic chemicals

Author:
Junker, Thomas; Paatzsch, Christiane; Knacker, Thomas
Source:
Science of the total environment 2010 v.408 no.18 pp. 3803-3810
ISSN:
0048-9697
Subject:
activated sludge; adsorption; aniline; benzoic acid; biochemical oxygen demand; biodegradation; industry; international trade; pretreatment; screening; sediments; Japan
Abstract:
... A water-sediment screening tool (WSST) was developed based on OECD guideline 301 C (MITI I; Ministry of International Trade and Industry, Japan) to generate biodegradation data. The WSST and experimental procedures were tested and validated using aniline (CAS No. 62-53-3) and benzoic acid (CAS No. 65-85-0) as reference substances. In the presence of sediment components a higher endogenous respirat ...
DOI:
10.1016/j.scitotenv.2009.11.011
PubMed:
19945141

17. Abundances, distribution, and sources of trace metals in Nakaumi-Honjo coastal lagoon sediments, Japan

Author:
Ahmed, Faruque; Bibi, M. Hawa; Seto, Koji; Ishiga, Hiroaki; Fukushima, Takehiko; Roser, Barry P.
Source:
Environmental monitoring and assessment 2010 v.167 no.1-4 pp. 473-491
ISSN:
0167-6369
Subject:
sediments; ferric oxide; aquatic organisms; water quality; monitoring; copper; organic matter; lead; arsenic; zinc; guidelines; pollution; anthropogenic activities; nickel; toxicity; chromium; coastal water; databases; Japan
Abstract:
... Bottom sediments from Nakaumi Lagoon and the Honjo Area in southwest Japan were analyzed to determine their geochemical compositions and to assess potential impacts by comparison with sediment quality guidelines. Present-day water quality was also assessed. Results showed that the water quality of Nakaumi Lagoon and the Honjo area contrasts between their upper and lower parts. Average abundances o ...
DOI:
10.1007/s10661-009-1065-8
PubMed:
19593644

18. Accumulation of Organotin Compounds in the Deep-Sea Environment of Nankai Trough, Japan

Author:
Hiroya Harino; Nozomu Iwasaki; Takaomi Arai; Madoka Ohji; Nobuyuki Miyazaki
Source:
Archives of environmental contamination and toxicology 2005 v.49 no.4 pp. 497-503
ISSN:
0090-4341
Subject:
Bivalvia; Gastropoda; Holothuroidea; carbon; crabs; food chain; microsymbionts; organic matter; organotin compounds; partition coefficients; photosynthesis; phytoplankton; sediments; Japan
Abstract:
... The concentration of butyltin (BT) and phenyltin (PT) compounds was measured in sediment, gastropods (Colliloconcha nankaiensis), sea cucumbers (Psychropotes verrucosa), galatheid crabs (Munidopsis albatrossae and Munidopsis subsquamosa), and bivalves (Clyptogena tsubasa and Clyptogena nautilei) collected from the Nankai Trough (water depth about 3000 m). Sediment at depths of up to 1 cm was taken ...
DOI:
10.1007/s00244-005-7014-9

19. Accumulation of endocrine disrupting chemicals (EDCs) in the polychaete Paraprionospio sp. from the Yodo River mouth, Osaka Bay, Japan

Author:
Mohd Yusoff Nurulnadia; Jiro Koyama; Seiichi Uno; Asami Kito; Emiko Kokushi; Eugene Tan Bacolod; Kazuki Ito; Yasutaka Chuman
Source:
Environmental monitoring and assessment 2014 v.186 no.3 pp. 1453-1463
ISSN:
0167-6369
Subject:
Polychaeta; animals; bioaccumulation; bisphenol A; endocrine-disrupting chemicals; estradiol; estrone; sediments; summer; Japan
Abstract:
... This study presents the levels of endocrine disrupting chemicals (EDCs) accumulated by Paraprionospio sp. from the Yodo River mouth, Osaka Bay. Since high concentrations of nonylphenol (NP), bisphenol A (BP), octylphenol (OP), 17β-estradiol (E2), and estrone (E1) have been measured in sediment from Osaka Bay, some bioaccumulation could be expected particularly in benthic animals. EDCs were analyse ...
DOI:
10.1007/s10661-013-3466-y
PubMed:
24114280

20. Accumulation of quaternary ammonium compounds as emerging contaminants in sediments collected from the Pearl River Estuary, China and Tokyo Bay, Japan

Author:
Xi Dai; Cuicui Wang; James C.W. Lam; Nobuyoshi Yamashita; Eriko Yamazaki; Yuichi Horii; Weifang Chen; Xiaolin Li
Source:
Marine pollution bulletin 2018 v.136 pp. 276-281
ISSN:
0025-326X
Subject:
benzalkonium chloride; estuaries; products and commodities; quaternary ammonium compounds; rivers; sediments; water pollution; China; Japan
Abstract:
... In this work, the distribution of quaternary ammonium compounds (QACs) in two dated sediment cores, collected from the Pearl River Estuary (PRE) and Tokyo Bay (TB), were investigated to understand the historical input of QACs and their diagenetic behavior in urban estuarine environments. The vertical variation profiles of QAC concentrations showed that benzylalkyldimethyl ammonium compounds (BACs) ...
DOI:
10.1016/j.marpolbul.2018.09.027

21. Actinomycete bacteria isolated from the sediments at coastal and offshore area of nagasaki prefecture, Japan: Diversity and biological activity

Author:
Anzai, Kozue; Nakashima, Takuji; Kuwahara, Natsumi; Suzuki, Rieko; Ohfuku, Yuko; Takeshita, Satoshi; Ando, Katsuhiko
Source:
Journal of bioscience and bioengineering 2008 v.106 no.2 pp. 215-217
ISSN:
1389-1723
Subject:
Actinomycetales; bacteria; bioactive properties; biodiversity; secondary metabolites; sediments; Japan
Abstract:
... About 800 strains of actinomycetes were isolated from marine environments around Nagasaki Prefecture, Japan. The isolates were compared with taxa and biological activities of their secondary metabolites. It is suggested that a variety of actinomycetes are isolated from different marine environments. ...
DOI:
10.1263/jbb.106.215

22. Active forearc shortening in Tohoku, Japan: Constraints on fault geometry from erosion rates and fluvial longitudinal profiles

Author:
Christine Regalla; Eric Kirby; Donald Fisher; Paul Bierman
Source:
Geomorphology 2013 v.195 no. pp. 84-98
ISSN:
0169-555X
Subject:
basins; landscapes; mathematical models; rivers; sediments; streams; tectonics; Japan
Abstract:
... Convexities in the longitudinal profiles of actively incising rivers are typically considered to represent the morphologic signal of a transient response to external perturbations in tectonic or climatic forcing. Distinguishing such knickzones from those that may be anchored to the channel network by spatial variations in rock uplift, however, can be challenging. Here, we combine stream profile an ...
DOI:
10.1016/j.geomorph.2013.04.029

23. Additive Effects of Sediment and Nutrient on Leaf Litter Decomposition and Macroinvertebrates in Hyporheic Zone

Author:
Md. Khorshed Alam; Junjiro N. Negishi; Pongpet Pongsivapai; Shohei Yamashita; Tomohiro Nakagawa
Source:
Water 2021 v.13 no.10 pp. -
ISSN:
2073-4441
Subject:
Alnus japonica; Japan; detritivores; hyporheic zone; leaves; macroinvertebrates; nitrates; particle size; plant litter; rivers; sediments; water
Abstract:
... Despite the fact that leaf decomposition constitutes an important function in rivers, how multiple environmental stressors simultaneously affect it remains largely unknown. This study investigated the interactive effects of fine sediments (particle size: <2 mm; experimentally manipulated) and a specific nutrient (i.e., nitrate) on subsurface (hyporheic) leaf litter decomposition rate and macroinve ...
DOI:
10.3390/w13101340

24. Adopting deep learning methods for airborne RGB fluvial scene classification

Author:
Patrice E. Carbonneau; Stephen J. Dugdale; Toby P. Breckon; James T. Dietrich; Mark A. Fonstad; Hitoshi Miyamoto; Amy S. Woodget
Source:
Remote sensing of environment 2020 v.251 pp. 112107
ISSN:
0034-4257
Subject:
Japan; data collection; environment; humans; image interpretation; labor; land cover; landscapes; neural networks; riparian areas; rivers; sediments; statistical analysis; vegetation; Canada; Costa Rica; Italy; United Kingdom
Abstract:
... Rivers are among the world's most threatened ecosystems. Enabled by the rapid development of drone technology, hyperspatial resolution (<10 cm) images of fluvial environments are now a common data source used to better understand these sensitive habitats. However, the task of image classification remains challenging for this type of imagery and the application of traditional classification algorit ...
DOI:
10.1016/j.rse.2020.112107

25. Alien worm in worm: a new genus of endoparasitic polychaete (Phyllodocidae, Annelida) from scale worms (Aphroditidae and Polynoidae, Annelida)

Author:
Naoto Jimi; Taeko Kimura; Akito Ogawa; Hiroshi Kajihara
Source:
Systematics and biodiversity 2020 v.19 no.1 pp. 13-21
ISSN:
1478-0933
Subject:
Japan; Phyllodocidae; biodiversity; endoparasites; new genus; phylogeny; sediments
Abstract:
... Up to now, 19 species in eight genera and two families (Dorvilleidae and Oenonidae) of polychaetes are known to be endoparasitic in the body of other polychaetes. In this paper, we describe Endovermis seisuiae gen. et sp. nov. as the first representative of Phyllodocidae parasitizing other polychaetes. Specimens of E. seisuiae were found in the body cavity of Aphrodita sp. (Aphroditidae) and Lepid ...
DOI:
10.1080/14772000.2020.1785038

26. An Experimental Test of the Ability of Daphnia Galeata Resting Egg Production in Lake Biwa

Author:
Narumi K. TSUGEKI; Jotaro URABE
Source:
Journal of limnology 2014 v.73 no.1 pp. -
ISSN:
1723-8633
Subject:
Daphnia galeata; egg production; eggs; endocrine-disrupting chemicals; genetic variation; lakes; rearing; sediments; winter; Japan
Abstract:
... The Daphnia galeata population in Lake Biwa (Japan) had almost ceased producing resting eggs by the 1980s. To examine whether D. galeata had lost the ability to produce resting eggs, or if chemical contamination was inhibiting resting egg production, individuals collected in fall (November) and late winter (March), were reared in the laboratory. More than 50% of these D. galeata individuals produc ...
DOI:
10.4081/jlimnol.2014.569

27. An assessment to prioritise the critical erosion-prone sub-watersheds for soil conservation in the Gumti basin of Tripura, North-East India

Author:
Istak Ahmed; Nibedita Das (Pan); Jatan Debnath; Moujuri Bhowmik
Source:
Environmental monitoring and assessment 2017 v.189 no.11 pp. 600
ISSN:
0167-6369
Subject:
Universal Soil Loss Equation; afforestation; basins; geographic information systems; international cooperation; land degradation; rivers; sediments; shifting cultivation; soil conservation; soil erosion; subwatersheds; terraces; topsoil; tropics; India; Japan
Abstract:
... Erosion-induced land degradation problem has emerged as a serious environmental issue across the world. Assessment of this problem through modelling can generate valuable quantitative information for the planners to identify priority areas for proper soil conservation measures. The Gumti River basin of Tripura falls under humid tropical climate and experiences soil erosion for a prolonged period w ...
DOI:
10.1007/s10661-017-6315-6

28. An inter-laboratory comparison of different analytical methods for the determination of monomethylmercury in various soil and sediment samples: A platform for method improvement

Author:
Hitoshi Kodamatani; Steven J. Balogh; Yabing H. Nollet; Akito Matsuyama; Vesna Fajon; Milena Horvat; Takashi Tomiyasu
Source:
Chemosphere 2017 v.169 pp. 32-39
ISSN:
0045-6535
Subject:
acetaldehyde; ecosystem services; fluorescence; gas chromatography; gold; industrial wastes; mercury; methylmercury compounds; mining; sediments; soil; spectroscopy; sulfur; traditional technology; volcanic activity; Indonesia; Japan; Slovenia; United States
Abstract:
... An inter-laboratory study was conducted to compare results from different analytical methods for monomethylmercury (MeHg) concentrations in 17 soil and sediment samples. The samples were collected from mercury-contaminated areas, including Minamata Bay and Kagoshima Bay in Japan, the Idrija mercury mine in Slovenia, and an artisanal small-scale gold mining area in Indonesia. The Hg in these sample ...
DOI:
10.1016/j.chemosphere.2016.10.129

29. An intercalibrated Triassic conodont succession and carbonate carbon isotope profile, Kamura, Japan

Author:
Lei Zhang; Michael J. Orchard; Thomas J. Algeo; Zhong-Qiang Chen; Zhengyi Lyu; Laishi Zhao; Kunio Kaiho; Biao Ma; Shijie Liu
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2019 v.519 pp. 65-83
ISSN:
0031-0182
Subject:
Changhsingian age; Triassic period; atolls; carbon; carbonates; extinction; isotopes; reference standards; sea level; sediments; subsidence; Japan
Abstract:
... The Kamura section, located in the Chichibu Belt of Kyushu Island in southern Japan, contains a succession of uppermost Permian to Upper Triassic shallow-marine atoll sediments from the mid-Panthalassic Ocean. In the present study, carbonate microfacies, conodont biostratigraphy, and carbonate carbon isotopes were analyzed, making it possible to construct a detailed biochronological framework for ...
DOI:
10.1016/j.palaeo.2017.09.001

30. Anaerobic biodegradation of biphenyl in various paddy soils and river sediment

Author:
Yang, S.; Yoshida, N.; Baba, D.; Katayama, A.
Source:
Chemosphere 2008 v.71 no.2 pp. 328-336
ISSN:
0045-6535
Subject:
biphenyl; soil pollution; paddy soils; sediments; rivers; biodegradation; anaerobic conditions; metabolism; soil microorganisms; bacteria; anaerobes
DOI:
10.1016/j.chemosphere.2007.09.002
PubMed:
17950776

31. Analysis of Bed Load Equations and River Bed Level Variations Using Basin-Scale Process-Based Modelling Approach

Author:
Md Aynul Kabir; Dushmanta Dutta; Sadayuki Hironaka; Alexis Pang
Source:
Water resources management 2012 v.26 no.5 pp. 1143-1163
ISSN:
0920-4741
Subject:
case studies; dynamic models; ecosystems; equations; particle size; pollution load; rivers; sediments; shear stress; stream channels; surpluses; watersheds; Japan
Abstract:
... Bed load transport is a key process in maintaining the dynamically stable channel geometry for restoring the form and function of river ecosystems. Bed load consists of relatively large sediment particles that are moved along the streambed by rolling, sliding or saltation. Currently, various empirical correlations are used to estimate bed load transport rates since no single procedure, whether the ...
DOI:
10.1007/s11269-011-9951-6

32. Analysis of Stratum Subsidence Induced by Depressurization at an Offshore Hydrate-Bearing Sediment

Author:
Shuxia Li; Shuyue Ding; Didi Wu; Xiaopu Wang; Yongmao Hao; Qingping Li; Weixin Pang
Source:
Energy & fuels 2021 v.35 no.2 pp. 1381-1388
ISSN:
1520-5029
Subject:
Japan; dissociation; energy; permeability; sediments; simulation models; subsidence; temperature; Pacific Ocean
Abstract:
... Gas production from an offshore hydrate-bearing sediment (HBS) by depressurization will reduce the strength of cementation and increase the effective stress of hydrate reservoirs, which can result in some potential geohazards, such as wellbore instability and stratum subsidence. In this study, a thermal–hydrological–mechanical–chemical coupling numerical simulation model was established and applie ...
DOI:
10.1021/acs.energyfuels.0c03833

33. Analysis of environmental and microbiological changes in Onagawa Bay immediately after the tsunami of the Great East Japan Earthquake based on sediment cores

Author:
Yutaka Okumura; Kenji Kaneko; Hiroto Ota; Hiromitsu Nagasaka; Motoyuki Hara
Source:
Marine pollution bulletin 2020 v.157 pp. 111235
ISSN:
0025-326X
Subject:
DNA; Japan; Miozoa; chlorophyll; earthquakes; marine pollution; phytoplankton; sediments; tsunamis
Abstract:
... We investigated two sediment cores to understand whether a tsunami in Onagawa Bay, Japan caused environmental changes. The value of δ¹³C ranged from −21.9‰ to −24.3‰ and of δ¹⁵N ranged from 5.1 to 5.9‰. We conclude that the source of the sediment in the present study area was mainly oceanic and not terrestrial. The chlorophyll concentration ranged from 1.8 to 4.0 μg/g ww, and did not vary greatly ...
DOI:
10.1016/j.marpolbul.2020.111235

34. Anammox and Denitrification in the Intertidal Sediment of the Hypereutrophic Yatsu Tidal Flat, Japan

Author:
Yukiko Senga; Tsubasa Sato; Megumi Kuroiwa; Seiichi Nohara; Yuichi Suwa
Source:
Estuaries and coasts 2019 v.42 no.3 pp. 665-674
ISSN:
1559-2723
Subject:
acetylene; anaerobic ammonium oxidation; bioavailability; denitrification; ecosystems; eutrophication; hydrogen sulfide; littoral zone; macroalgae; nitrogen; organic carbon; pollution load; regression analysis; sediments; stable isotopes; temperature; tracer techniques; Japan
Abstract:
... An increase in available nitrogen loading in intertidal ecosystems causes eutrophication and macroalgae blooms. Denitrification and anaerobic ammonium oxidation (anammox) lead to the removal of bioavailable nitrogen, but few studies have examined this in intertidal sediments. The sediment anammox and denitrification rates in September 2015 and November 2016 were measured using a ¹⁵N tracer techniq ...
DOI:
10.1007/s12237-019-00520-6

35. Annual respiration of Japanese mud snail Batillaria attramentaria in an intertidal flat: its impact on ecosystem carbon flows

Author:
Kei Kawasaki; Akiko Sasaki-Kinoshita; Takayuki Nakatsubo
Source:
Landscape and ecological engineering 2019 v.15 no.1 pp. 113-120
ISSN:
1860-1871
Subject:
Gastropoda; autumn; carbon; carbon dioxide; cell respiration; ecosystems; environmental factors; environmental impact; greenhouse gas emissions; ingestion; introduced species; laboratory experimentation; littoral zone; sediments; snails; spring; summer; surveys; temperature; tides; Japan
Abstract:
... The Japanese mud snail Batillaria attramentaria, a common gastropod in northeastern Asia, often predominates in isolated or degraded intertidal flat ecosystems in Japan and in other countries where it has invaded as an alien species. To evaluate the effects of B. attramentaria on carbon flow in intertidal flat ecosystems, we estimated the annual respiration of B. attramentaria from field surveys a ...
DOI:
10.1007/s11355-018-0365-y

36. Annual sediment respiration in estuarine sandy intertidal flats in the Seto Inland Sea, Japan

Author:
Akiko Sasaki; Yu Hagimori; Ichiro Yuasa; Takayuki Nakatsubo
Source:
Landscape and ecological engineering 2012 v.8 no.1 pp. 107-114
ISSN:
1860-1871
Subject:
carbon; estuaries; mineralization; models; organic matter; sediments; summer; temperature; watersheds; Japan
Abstract:
... To quantify organic matter mineralization at estuarine intertidal flats, we measured in situ sediment respiration rates using an infrared gas analyzer in estuarine sandy intertidal flats located in the northwestern Seto Inland Sea, Japan. In situ sediment respiration rates showed spatial and seasonal variations, and the mean of the rates is 38.8 mg CO2-C m−2 h−1 in summer. In situ sediment ...
DOI:
10.1007/s11355-011-0157-0

37. Anthropogenic disruption to the seismic driving of beach ridge formation: The Sendai coast, Japan

Author:
James Goff; Jasper Knight; Daisuke Sugawara; James P. Terry
Source:
Science of the total environment 2016 v.544 pp. 18-23
ISSN:
0048-9697
Subject:
bedload; coasts; dams (hydrology); earthquakes; geophysics; models; rivers; sediment traps; sediments; suspended sediment; tsunamis; watersheds; Japan
Abstract:
... The expected geomorphic after-effects of the Mw 9.0 Tōhoku-oki earthquake of 11 March 2011 (eastern Japan) are summarized by a schematic model of seismic driving, which details seismogenic disturbances to sediment systems that affect the rate or timing of sediment delivery to coastlines over timescales of 10²–10⁴years. The immediate physical environmental responses to this high-magnitude earthquak ...
DOI:
10.1016/j.scitotenv.2015.11.106

38. Anthropogenic impacts on meiobenthic Ostracoda (Crustacea) in the moderately polluted Kasado Bay, Seto Inland Sea, Japan, over the past 70 years

Author:
Toshiaki Irizuki; Hisayo Ito; Megumi Sako; Kaoru Yoshioka; Shigenori Kawano; Ritsuo Nomura; Yuichiro Tanaka
Source:
Marine pollution bulletin 2015 v.91 no.1 pp. 149-159
ISSN:
0025-326X
Subject:
Ostracoda; anthropogenic activities; carbon; cesium; chemical oxygen demand; environmental factors; eutrophication; heavy metals; lead; radionuclides; sediments; water pollution; Japan
Abstract:
... Two sediment cores were obtained from Kasado Bay, a moderate-polluted enclosed bay in Japan, to examine anthropogenic impacts on Ostracoda over the past ca. 70years. We analyzed ostracode abundance and diversity, grain size, and CHN, and used 210Pb and 137Cs as the dating method. The present study showed that cross-plot comparisons of ostracode abundance and each environmental factor, based on sed ...
DOI:
10.1016/j.marpolbul.2014.12.013

39. Antimicrobial potential of deep surface sediment associated bacteria from the Sea of Japan

Author:
Lyudmila A. Romanenko; Naoto Tanaka; Natalia I. Kalinovskaya; Valery V. Mikhailov
Source:
World journal of microbiology & biotechnology 2013 v.29 no.7 pp. 1169-1177
ISSN:
0959-3993
Subject:
Alteromonas; Brevibacillus; Halomonas; Marinobacter; Nocardiopsis; Paenibacillus; Pseudoalteromonas; Streptomyces; Sulfitobacter; bacteria; nuclear magnetic resonance spectroscopy; peptide antibiotics; phylogeny; sampling; screening; sediments; spectral analysis; Sea of Japan
Abstract:
... The aim of this study was to survey microorganisms from the deep surface sediment samples collected from the Sea of Japan and to screen them for antimicrobial and antagonistic effects. Phylogenetic analysis revealed most isolates sharing 98–100 % sequence similarity to recognized species, including those recovered previously from marine or saline environments. Alteromonas, Halomonas, Marinobacter, ...
DOI:
10.1007/s11274-013-1276-6
PubMed:
23386319

40. Application of Backpack-Mounted Mobile Mapping System and Rainfall–Runoff–Inundation Model for Flash Flood Analysis

Author:
Takahiro Sayama; Koji Matsumoto; Yuji Kuwano; Kaoru Takara
Source:
Water 2019 v.11 no.5 pp. -
ISSN:
2073-4441
Subject:
case studies; floods; models; mountains; remote sensing; rivers; satellites; sediments; surveys; topography; watersheds; Japan
Abstract:
... Satellite remote sensing has been used effectively to estimate flood inundation extents in large river basins. In the case of flash floods in mountainous catchments, however, it is difficult to use remote sensing information. To compensate for this situation, detailed rainfall–runoff and flood inundation models have been utilized. Regardless of the recent technological advances in simulation ...
DOI:
10.3390/w11050963

41. Application of real-time PCR assays to genotyping of F-specific phages in river water and sediments in Japan

Author:
Haramoto, Eiji; Kitajima, Masaaki; Katayama, Hiroyuki; Asami, Mari; Akiba, Michihiro; Kunikane, Shoichi
Source:
Water research 2009 v.43 no.15 pp. 3759-3764
ISSN:
0043-1354
Subject:
sediments; sediment contamination; humans; polymerase chain reaction; microbial contamination; bacteriophages; feces; river water; genotype; point source pollution; Adenoviridae; environmental monitoring; Japan
DOI:
10.1016/j.watres.2009.05.043
PubMed:
19555992

42. Application of the newly developed nutrient diol index (NDI) as a sea surface nutrient proxy in the East Sea for the last 240 years

Author:
Jong-Ku Gal; Jung-Hyun Kim; Solbin Kim; Sang Han Lee; Kyu-Cheul Yoo; Kyung-Hoon Shin
Source:
Quaternary international 2019 v.503 pp. 146-152
ISSN:
1040-6182
Subject:
lead; nitrates; nutrient content; nutrients; observational studies; phosphates; principal component analysis; sedimentation rate; sediments; Japan
Abstract:
... We assessed the applicability of the nutrient diol index (NDI) as a proxy for sea surface nutrients by analyzing sediments from a box core (ES14-BC03) collected in the southwestern continental slope of the East Sea, or the Japan Sea (hereafter the East Sea). The estimated sedimentation rate based on the 210Pb chronology was 0.15 cm yr−1 over the last 240 yrs. The NDI-derived phosphate (0.69 μmol L ...
DOI:
10.1016/j.quaint.2018.11.003

43. Approach deliberation for source identification of sedimentary organic matters via comparing freshwater lakes with multi-ecotypes

Author:
Xiaoguang Xu; Wei Li; Hui Deng; Megumu Fujibayashi; Munehiro Nomura; Osamu Nishimura; Guoxiang Wang
Source:
Science of the total environment 2019 v.649 pp. 327-334
ISSN:
0048-9697
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; Miozoa; Nelumbo; Nymphoides; Phragmites; Trapa; bacteria; biomarkers; ecotypes; eutrophication; fatty acid composition; fatty acids; freshwater ecosystems; freshwater lakes; microalgae; organic matter; plants (botany); sediments; stable isotopes; statistical models; China; Japan
Abstract:
... Despite of the importance of understanding the sediment quality for lacustrine management, the source evaluation of sedimentary organic matter (SOM) in freshwater lakes is still insufficient. In this study, two shallow eutrophic lakes of Lake Taihu, China and Lake Izunuma, Japan were systematically investigated. Results of fatty acid profiles demonstrated that a wide range of organic matters, vary ...
DOI:
10.1016/j.scitotenv.2018.08.236

44. Archaeal polar lipids in subseafloor sediments from the Nankai Trough: Implications for the distribution of methanogens in the deep marine subsurface

Author:
Masahiro Oba; Susumu Sakata; Tetsuya Fujii
Source:
Organic geochemistry 2015 v.78 pp. 153-160
ISSN:
0146-6380
Subject:
sediments; sugars; methane production; biomarkers; organic carbon; lipids; methane; Archaea; phosphates; hydrolysis; coasts; methanotrophs; methanogens; stable isotopes; moieties; Japan
Abstract:
... Although the methane in marine methane hydrates is mainly of microbial origin, information about the distribution of methanogens in subseafloor sediments is limited. To address this issue, we analyzed sediment core samples from two sites in the Nankai Trough, off the Pacific coast of central Japan, including those bearing methane hydrates from depths >100m below the seafloor (mbsf), for isopranyl ...
DOI:
10.1016/j.orggeochem.2014.11.006

45. Arsenic and Mn levels in Isaza (Gymnogobius isaza) during the mass mortality event in Lake Biwa, Japan

Author:
Sawako Horai Hirata; Daisuke Hayase; Akifumi Eguchi; Takaaki Itai; Kei Nomiyama; Tomohiko Isobe; Tetsuro Agusa; Toshiyuki Ishikawa; Michio Kumagai; Shinsuke Tanabe
Source:
Environmental pollution 2011 v.159 no.10 pp. 2789-2796
ISSN:
0269-7491
Subject:
Environmental Quality Incentives Program; arsenic; barium; cadmium; chromium; cobalt; copper; fish; indigenous species; lakes; lead; magnesium; manganese; mercury; molybdenum; mortality; nickel; sediments; selenium; strontium; tin; toxicity; zinc; Japan
Abstract:
... The present study measured the concentrations of 25 elements (Li, Mg, V, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Rb, Sr, Mo, Ag, Cd, In, Sn, Sb, Cs, Ba, Hg, Tl, Pb and Bi) in the whole body of Isaza which is an endemic fish species to Lake Biwa, Japan, and compared the values in the specimens from the mass mortality Isaza (MMI) and normal fresh Isaza (NFI). The mean levels of Mn and total As (T-As) were r ...
DOI:
10.1016/j.envpol.2011.05.007
PubMed:
21640454

46. Assessing high impacts of climate change: spatial characteristics and relationships of hydrological ecosystem services in northern Japan (Teshio River watershed)

Author:
Min Fan; Hideaki Shibata; Li Chen
Source:
Mitigation and adaptation strategies for global change 2018 v.23 no.4 pp. 525-552
ISSN:
1381-2386
Subject:
Soil and Water Assessment Tool model; climate; climate change; ecosystem services; ecosystems; land use; nutrient management; nutrient retention; planning; riparian vegetation; rivers; sediments; stakeholders; sustainable development; watersheds; Japan
Abstract:
... Ecosystem services (ESs) provide information on the tendency of ecosystems to reach and form a state of equilibrium. The process of ES changes is important in order to identify the climate change-related causes that occur regionally to globally. ES-based management plays an important role in mitigation strategies for the negative impact of global climate change on ecosystem. Therefore, it is neces ...
DOI:
10.1007/s11027-017-9748-x

47. Assessing the impact of 1498 Meio earthquake and tsunami along the Enshu-nada coast, central Japan using coastal geology

Author:
Osamu Fujiwara; Eisuke Ono; Toshifumi Yata; Masatomo Umitsu; Yoshiki Sato; Vanessa M.A. Heyvaert
Source:
Quaternary international 2013 v.308-309 no. pp. 4-12
ISSN:
1040-6182
Subject:
coasts; earthquakes; marshes; mass transfer; rivers; sediments; social change; tsunamis; Japan; Pacific Ocean
Abstract:
... The AD 1498 Meio earthquake (M8.2∼8.4) that occurred along the eastern Nankai trough, and the tsunami generated by the earthquake, induced major geomorphological and social changes along the Pacific coast of central Japan. Geological coring along the palaeochannel of the Hamana River, southern Shizuoka Prefecture, revealed that its river mouth was abruptly closed followed by a rapid change from ri ...
DOI:
10.1016/j.quaint.2012.12.009

48. Assessment of Antifouling Biocides Contaminations in Maizuru Bay, Japan

Author:
Eguchi, Sayaka; Harino, Hiroya; Yamamoto, Yoshikazu
Source:
Archives of environmental contamination and toxicology 2010 v.58 no.3 pp. 684-693
ISSN:
0090-4341
Subject:
Mytilus edulis; acceptable daily intake; aquatic environment; biocides; body weight; coastal water; coasts; copper; diuron; organotin compounds; oxides; paints; sediments; ships; Japan
Abstract:
... The concentrations of organotin compounds in the aquatic environment of Maizuru Bay and their spatial distribution are discussed. The concentrations of tributyltin (TBT) compounds in water samples ranged from 0.001 to 0.002 μg l⁻¹, and monobutyltin compounds were the dominant species among the butyltin compounds. TBT concentrations in Maizuru Bay are low compared with other coastal waters of Japan ...
DOI:
10.1007/s00244-009-9394-8
PubMed:
19771461

49. Assessment of Heavy Metal Pollution in the Sediments of the River Pra and Its Tributaries

Author:
Albert Ebo Duncan; Nanne de Vries; Kwabena Biritwum Nyarko
Source:
Water, air, and soil pollution 2018 v.229 no.8 pp. 272
ISSN:
0049-6979
Subject:
anthropogenic activities; arsenic; atomic absorption spectrometry; basins; cadmium; chromium; dry season; heavy metals; hydrides; iron; lead; manganese; mining; models; nickel; pollution load; rivers; sediments; wet season; zinc; Ghana; Japan
Abstract:
... An investigative study was conducted to determine the heavy metal pollution in the sediment in the Pra Basin of Ghana from 27 sampling points during the dry and wet seasons using the geo-accumulation index (Igeo), enrichment factor (EF), and pollution load index (PLI). Sediments were acid digested and analyzed for the following selected metals: arsenic (As), lead (Pb), cadmium (Cd), zinc (Zn), man ...
DOI:
10.1007/s11270-018-3899-6
PubMed:
30147192
PubMed Central:
PMC6096550

50. Assessment of dam removal from geochemical examination of Kuma River sediment, Kyushu, Japan

Author:
Sansfica M. Young; Hiroaki Ishiga
Source:
Environmental monitoring and assessment 2014 v.186 no.12 pp. 8267-8289
ISSN:
0167-6369
Subject:
chromium; copper; dams (hydrology); environmental monitoring; guidelines; lead; rivers; sediment contamination; sediments; zinc; zirconium; Japan
Abstract:
... The aim of this study was to determine if Arase dam gate removal and flushing elevated concentrations of any trace elements in Kuma River and Yatsushiro Bay sediments or caused riverine environmental change. The Arase dam gate on the Kuma River was opened in April 2010. Surface and bottom sediments were compared using 10-cm-long cores (2011) and two grain size fractions. Surface sediment data from ...
DOI:
10.1007/s10661-014-4002-4
PubMed:
25182684