scholarly journals MICROPLASTIC IN THE DEEP-SEA SEDIMENT OF SOUTHWESTERN SUMATRAN WATERS

2016 ◽  
Vol 41 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Muhammad Reza Cordova ◽  
A'an J. Wahyudi
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Deep Sea ◽  
Plastic Waste ◽  
Waste Plastic ◽  
Deep Sea Sediment ◽  
Sediment Samples ◽  
Sampling Locations ◽  
International Indian Ocean Expedition ◽  
Marine Areas

Indonesia was recently ranked second on the list of countries producing plastic waste. Plastic can be degraded by thermal oxidation either with ultraviolet radiation and by mechanical to a very small size the size will be smaller. Degraded plastic with small sizes (<5 mm) measured has been micrometers known as microplastic. We took sediment samples on 07-18 May 2015 in EWIN 2015 cruise, which part of the contribution of Indonesian researchers for the International Indian Ocean Expedition-2 program, at 66.8 to 2182 m below sea level. Microplastic analysis from the sediment was carried out by using flotation methods. We found microplastic in 8 locations out of 10 sampling locations. We found 41 particles microplastic with a form of granules (35 particles) and fibers (6 particles). Most of microplastic particles were found at depths less than 500 m with 20 particles. The discovery of microplastic in the sediment from the sea of western Sumatra at a depth more than 2000 m, indicated that plastic, considered new developed materials (early nineteen centuries made), has invaded marine areas, including pristine areas. It confirms the statement that plastic waste has spread widely to different areas of the seas and oceans, including remote and mostly unknown areas such as the deep sea.

scholarly journals Acuticoccus sediminis sp. nov., isolated from deep-sea sediment of the Indian Ocean and proposal of Acuticoccaceae fam. nov

2019 ◽  
Vol 69 (4) ◽  
pp. 1173-1178 ◽  
Author(s):  
Qiliang Lai ◽  
Xiupian Liu ◽  
Fenqing Sun ◽  
Zongze Shao
Keyword(s):  
Indian Ocean ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Deep Sea ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Content Type ◽  
Deep Sea Sediment ◽  
Link Type ◽  
The Indian Ocean

A Gram-staining negative, aerobic, oval-shaped bacterium, designated strain PTG4-2T, was isolated from deep-sea sediment of the Indian Ocean. Growth was observed with 1–9 % (w/v) NaCl with optimal growth with 3 %, at pH 6.0–10.0 with an optimum of pH 7.0, and at 4–40 °C with an optimum of 30 °C. Positive for catalase and oxidase. The results of a 16S rRNA gene sequence comparison indicated that PTG4-2T was most closely related to Acuticoccus yangtzensis JL1095T (97.3 %), followed by Acuticoccus kandeliae J103T (96.5 %), all other species shared <93 % sequence similarity. The results of phylogenetic analysis based on 16S rRNA gene sequences indicated that PTG4-2T forms a distinct lineage within the genus Acuticoccus , and revealed that the genus Acuticoccus forms a novel family-level clade in the order Rhizobiales . The ANI and the DNA–DNA hybridization estimate values between PTG4-2T and two type strains (A. yangtzensis JL1095T and A. kandeliae J103T) were 79.9–76.2 % and 23.1–20.8 %, respectively. PTG4-2T contained Q-10 as the predominant ubiquinone. The principal fatty acids (>5 %) were summed feature 8 [C18 : 1 ω7c/ω6c (72.2 %)], C18 : 0 (8.4 %), C20 : 1 ω7c (6.4 %) and C16 : 0 (6.3 %). The polar lipids consisted of phosphatidylglycerol, three unidentified phospholipids, two unidentified glycolipids, one unidentified aminolipid and one unknown lipid. The DNA G+C content of PTG4-2T is 69.2 mol%. On the basis of the polyphasic taxonomic evidence presented in this study, PTG4-2T should be classified as representing a novel species of the genus Acuticoccus , for which the name Acuticoccus sediminis sp. nov. is proposed, with the type strain PTG4-2T (=MCCC 1A01274T=KCTC 52323T). In addition, a novel family, Acuticoccaceae fam. nov., is proposed to accommodate the genus Acuticoccus .

scholarly journals Dominance of Wolbachia sp. in the deep-sea sediment bacterial metataxonomic sequencing analysis in the Bay of Bengal, Indian Ocean

Genomics ◽  
2020 ◽  
Vol 112 (1) ◽  
pp. 1030-1041 ◽  
Author(s):  
A. Parvathi ◽  
V. Jasna ◽  
V.K. Aswathy ◽  
S. Aparna ◽  
V.K. Nathan ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Bay Of Bengal ◽  
Deep Sea ◽  
Sequencing Analysis ◽  
Deep Sea Sediment

scholarly journals Draft Genome Sequence of Thalassospira xiamenensis Strain MCCC 1A03042T

2017 ◽  
Vol 5 (9) ◽  
Author(s):  
Meiqing Li ◽  
Shuo Yang ◽  
Qiliang Lai ◽  
Zongze Shao
Keyword(s):  
Heavy Metal ◽  
Indian Ocean ◽  
Deep Sea ◽  
Draft Genome ◽  
Protein Coding ◽  
Content Type ◽  
Deep Sea Sediment ◽  
Arsenic Tolerance ◽  
Protein Coding Genes ◽  
The Indian Ocean

ABSTRACT Thalassospira xiamenensis strain MCCC 1A03042T was isolated from deep-sea sediment of the Indian Ocean, and it was characterized with heavy-metal arsenic tolerance. Here, we present the draft genome of strain MCCC 1A03042T, which contains 4,786,207 bp with a G+C content of 52.6% and 4,359 protein-coding genes.

Halomonas sedimenti sp. nov., a Halotolerant Bacterium Isolated from Deep-Sea Sediment of the Southwest Indian Ocean

2021 ◽  
Vol 78 (4) ◽  
pp. 1662-1669
Author(s):  
Xu Qiu ◽  
Libo Yu ◽  
Xiaorong Cao ◽  
Huangming Wu ◽  
Guangxin Xu ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Deep Sea ◽  
Southwest Indian Ocean ◽  
Deep Sea Sediment ◽  
Halotolerant Bacterium

scholarly journals Winter Thermohaline Features along 10 degree N in the Bay of Bengal

2019 ◽  
Vol 69 (2) ◽  
pp. 115-119
Author(s):  
Dominic Ricky Fernandez ◽  
Suganth Balaji ◽  
T. Pradeep Kumar ◽  
K. V. Sanilkumar
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Fresh Water ◽  
Bay Of Bengal ◽  
Cyclonic Eddy ◽  
Sea Level Anomaly ◽  
Sound Channel ◽  
Channel Characteristics ◽  
Naval Ship ◽  
International Indian Ocean Expedition

To commemorate the contributions made by Indian Naval Ship (INS) Kistna during the first International Indian ocean expedition programme a scientific cruise was planned in the Bay of Bengal during November 2017 onboard INS Sagardhwani. The objective was to study the thermohaline properties along 10 °N in the Bay of Bengal and understand the sound channel characteristics in the region. A fresh water cap of ~20 m thickness is noticed in the top layers of the Bay of Bengal occupying the region extending from 83 °E – 93 °E. A prominent anti-cyclonic eddy was noticed around 10 °N centered between 90 °E and 93 °E, a negative sea level (west of 90 °E) co-exists with a positive sea level anomaly to its east along the observational tracks along 10 °N. The climatological temperature and salinity sections also shows the same features as observed along the transect. The study also sheds light on the deep sound channel characteristics along the 10 °N channel.

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