scholarly journals Assessment of Tarmat Contamination and its Chemical Characterization along the West Coast of Qatar, Arabian Gulf

2020 ◽  
Author(s):  
Haseeba Kaiprath Puthiyapurayil ◽  
Veerasingam S ◽  
Shafeeq H ◽  
Jassim Al-Khayat ◽  
Vethamony P
Keyword(s):  
West Coast ◽  
Marine Ecosystem ◽  
High Tide ◽  
Chemical Characterization ◽  
Pollution Level ◽  
Chemical Characteristics ◽  
Northwestern Part ◽  
The West ◽  
Sampling Campaign ◽  
Bulk Chemical

Tarmat/Oil residue (hereafter ‘TM’) is one of the serious threats to the marine ecosystem due to their toxicity, persistence and bioaccumulation problems. To assess the level of TM contamination and to determine the primary differences in the chemical composition, a sampling campaign was conducted in 12 beaches along the west coast of Qatar. TM contamination ranged from 0 to 104 gm-1 with an average value of 9.25 gm-1. Moreover, all the TM samples were found to be highly weathered, blackish and asphalt-like material. Though the current TM pollution level is thirty-fold lesser than those found during 1993 to 1997, the contamination pattern was similar (i.e. northwestern part was highly contaminated). The distribution of TM along the Qatar coast is as follows: Low tide> high tide> berm line. Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectroscopy was used to examine the bulk chemical characteristics of the TMs. These bulk chemical characteristics have revealed several features unique to different types of TM samples.

scholarly journals Quantifying ecosystem responses to environmental and human pressures in the marine ecosystem off the west coast of Vancouver Island

2021 ◽  
Vol 132 ◽  
pp. 108232
Author(s):  
Jennifer L. Boldt ◽  
Elliott L. Hazen ◽  
Mary E. Hunsicker ◽  
Caihong Fu ◽  
R. Ian Perry ◽  
...  
Keyword(s):  
West Coast ◽  
Marine Ecosystem ◽  
Vancouver Island ◽  
The West ◽  
Ecosystem Responses

scholarly journals A new distribution record of the Horn Coral Caryophyllia grandis Gardiner & Waugh, 1938 (Anthozoa: Scleractinia) from the Karnataka Coast, India

2021 ◽  
Vol 13 (7) ◽  
pp. 18920-18924
Author(s):  
J. S. Yogesh Kumar ◽  
C. Raghunathan
Keyword(s):  
West Coast ◽  
Deep Sea ◽  
Marine Ecosystem ◽  
Ecosystem Dynamics ◽  
The West ◽  
West Coast Of India ◽  
Resource Exploration ◽  
Distribution Record ◽  
New Distribution ◽  
Marine Ecosystem Dynamics

Surveys were conducted under the project entitled “Resource exploration and Inventorisation of Deep Sea ecosystem & Marine ecosystem Dynamics: Sagar Sampada Cruise” by on-board FORV Sagar Sampada Cruise No. 374 from 2 April to 15 April 2018 from Okha to Cochin along the west coast of India.  The species Caryophyllia (Caryophyllia) grandis is recorded from a depth of 580m off Karwar, Karnataka and is reported herein as a new distribution record to the Karnataka coast, India. 

Interpretation of the Geochemistry of Oils of Taranaki and West Coast Region, Western New Zealand

1988 ◽  
Vol 6 (3) ◽  
pp. 201-212 ◽  
Author(s):  
Richard A. Cook
Keyword(s):  
West Coast ◽  
Vitrinite Reflectance ◽  
Vascular Plant ◽  
Source Rocks ◽  
Common Source ◽  
The West ◽  
High Hydrogen ◽  
Detailed Chemistry ◽  
Bulk Chemical ◽  
Oil Source

The predominant hydrocarbons produced in the Taranaki Basin are gas condensates, although oil has been discovered at several widespread locations and therefore remains a priority exploration objective. Study of the oil geochemistry by means of bulk chemical characteristics, isotope and biomarker content improves our understanding of their source rocks and maturation histories. Results show that the oils and condensates throughout the region are similar in their bulk chemical character, source environment and levels of maturation suggesting a common source for all the hydrocarbons. The source environments as indicated by biomarkers were terrestrial fresh water swamps with low bacterial anoxic conditions. The primary plant material deposited was vascular plant debris, and onshore in northern Taranaki and in the Murchison Basin, angiosperm debris was an important additional component. These angiosperm indicators are absent from the West Coast and southeastern Taranaki oils and condenstates. The overall environment of the oil sources rocks is similar to that which formed the high volatile coals of the West Coast. These coals, on source rock analyses, also reveal a perhydrous character equivalent to the high hydrogen index normally associated with marine oil source rocks. Maturation levels of the oils, equivalent to a vitrinite reflectance level of Ro 1.0% are indicated by biomarkers. The highest maturation levels reached by drilling so far are 0.9%. suggesting that oil source rocks in Taranaki Basin are at or below the maximum drilled depth of 5.5 km. After generation, the oils of the West Coast were slightly biodegraded as suggested by their low paraffin wax content. However, valid biomarker interpretations for source and maturation conditions are still possible. The widespread occurrences of oil and the consistent nature of the detailed chemistry of the oils suggest that in addition to gas condensate there is a reasonable prospectivity for oil especially in and adjacent to the Central Graben are of the Taranaki Basin and in parts of the West Coast.

Aquaculture Ponds as Important High-Tide Habitats for Waterbirds Along the West Coast of Taiwan

2018 ◽  
Vol 17 (1) ◽  
pp. 55-67 ◽  
Author(s):  
Mei-Ling Bai ◽  
Wen-Chieh Chih ◽  
Yi-Chien Lai ◽  
Pei-Fen Lee ◽  
Yu-Yi Lien
Keyword(s):  
West Coast ◽  
High Tide ◽  
The West ◽  
Aquaculture Ponds

scholarly journals Model Hidrodinamika Pasang Surut di Perairan Pesisir Barat Kabupaten Badung, Bali

2016 ◽  
Vol 2 (2) ◽  
pp. 54
Author(s):  
Made Narayana Adibhusana ◽  
I Gede Hendrawan ◽  
I Wayan Gede Astawa Karang
Keyword(s):  
Sea Level ◽  
West Coast ◽  
Current Velocity ◽  
Neap Tide ◽  
High Tide ◽  
Spring Tide ◽  
The West ◽  
Current Vector ◽  
Sea Current ◽  
Sea Currents

Finite Volume Coastal Ocean Model (FVCOM) is using for numerical modeling of hydrodynamic tidal water in west coast of Badung regency, Bali. The model result is validation with field observations data in the area using the equation Root Mean Square Error (RMSE). Field tidal data elevation of sea level elevation measurements were obtained by using the palm of tidal. Field data speed and direction of sea currents obtained using Lagrangian method. Excellent results obtained with RMSE values tidal elevation of sea level by 0.24 m dan RMSE values for sea current is 0.125 m/s. The results of model simulations show sea current patterns in the waters of the west coast of Badung regency, Bali relatively the same at the spring tide and neap tide conditions. The pattern of sea currents at high tide shows current vector that moves in toward the water of the west coast of Badung regency area from Bali Strait and the Indian Ocean. At the time of low tide sea current vector movement towards Bali Strait and the India Ocean. Sea current velocity in the eastern waters of the west coast of Badung regency (longitude of 115,05°– 115,17°) is higher than the sea current velocity in western waters area (longitude of 114,95°– 115,05°). Sea current velocity in the waters of the west coast of Badung regency on the condition of the spring tide range from 0.005 to 0.025 m/s, on the other side the sea current velocity on the neap tide conditions range from 0.005 to 0.012 m/s.

Historical Approaches to the Northern California Current Ecosystem

2001 ◽  
pp. 123-140 ◽  
Author(s):  
R.C. Francis ◽  
J. Field ◽  
D. Holmgren ◽  
A. Strom
Keyword(s):  
West Coast ◽  
Large Scale ◽  
Marine Ecosystem ◽  
California Current ◽  
Historical Record ◽  
Climate Forcing ◽  
The West ◽  
Coastal Species ◽  
Northern California Current ◽  
Nineteenth And Twentieth Centuries

R. C. Francis, J. Field, D. Holmgren and A. Strom traces the historical record of the west coast North American marine ecosystem through historical, paleoclimatological, and environmental disciplines in order to understand its development over centuries of change. The results show that large-scale climate forcing is a core factor in the fluctuating stock of coastal species over the eighteenth, nineteenth, and twentieth centuries.

scholarly journals Growth and nutritional condition of anchovy larvae on the west and southeast coasts of South Africa

2020 ◽  
Vol 644 ◽  
pp. 119-128 ◽  
Author(s):  
D Costalago ◽  
Y Kisten ◽  
C Clemmesen ◽  
NA Strydom
Keyword(s):  
South Africa ◽  
Growth Rates ◽  
West Coast ◽  
Marine Ecosystem ◽  
Nutritional Condition ◽  
Nursery Area ◽  
Individual Growth ◽  
Eastern Coast ◽  
The West ◽  
Southeast Coast

Cape anchovy Engraulis encrasicolus is an ecologically and economically important pelagic fish species occurring along the coast of South Africa. A recent eastward shift in Cape anchovy distribution indicates that environmental conditions are becoming more favorable for the species on the east coast. This shift is particularly important in the sheltered Algoa Bay region, a nursery area for fish larvae. However, the relatively low productivity of the Agulhas Current Large Marine Ecosystem on the eastern coast of South Africa may result in an anchovy population in poorer nutritional condition and with slower growth rates than the west coast population. Using otolith and nucleic acid analyses, the growth rates of anchovy larvae from the western and southeastern coasts of South Africa were compared. The otolith analysis results indicated that, at any given age, individual growth rates for anchovy larvae were higher on the southeast coast than on the west coast. The RNA:DNA values also indicated that instantaneous growth rates of anchovy larvae were higher in Algoa Bay than on the west coast. At the time of sampling, chlorophyll and zooplankton productivity were higher at sampling sites in Algoa Bay than sites on the west coast, potentially due to favorable oceanographic features in the bay. As such, the results suggest that Algoa Bay is a suitable and potentially favorable nursery area for the early stages of anchovy, highlighting the importance of separate management of the southeast coast region in a changing world.

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