scholarly journals Temporal and Spatial Distribution of the Toxic Epiphytic Dinoflagellate Ostreopsis cf. ovata in the Coastal Waters off Jeju Island, Korea

2020 ◽  
Vol 12 (14) ◽  
pp. 5864
Author(s):  
Jaeyeon Park ◽  
Jinik Hwang ◽  
Jun-Ho Hyung ◽  
Eun Young Yoon
Keyword(s):  
Spatial Distribution ◽  
Water Temperature ◽  
Coastal Waters ◽  
Microscopic Analysis ◽  
Jeju Island ◽  
Northern Coast ◽  
Temporal And Spatial Distribution ◽  
Chain Reactions ◽  
Polymerase Chain Reactions ◽  
Temporal And Spatial

The temporal and spatial distribution of the toxic epiphytic dinoflagellate Ostreopsis cf. ovata was investigated off the Jeju coastal waters, Korea, from July 2016 to January 2019. The results showed that the presence of Ostreopsis cf. ovata in 184 macroalgae was 79.3%, and it was more frequently attached to red algae and brown algae than to green algae. The abundance of Ostreopsis cf. ovata as determined by quantitative real-time polymerase chain reactions (qPCR) and microscopic analysis was 4–3204 cells g−1, and the maximum abundance observed in September 2018, when the water temperature was 24.4 °C. The abundance was higher in summer and autumn than in spring and winter. Spatially, high abundance was observed in autumn on the northern coast of Jeju Island and, in summer, in the southern and eastern coastal waters. The water temperature of Jeju coastal waters in winter remained higher than 15 °C, and this species could be overwintering in the Jeju waters. Therefore, further monitoring and research are needed to evaluate the proliferation of Ostreopsis cf. ovata, which contains a novel toxin with unidentified effects on humans.

scholarly journals Temporal and spatial distribution of harmful algal bloom (HAB) species in coastal waters of Kota Kinabalu, Sabah, Malaysia

Harmful Algae ◽  
2011 ◽  
Vol 10 (5) ◽  
pp. 495-502 ◽  
Author(s):  
Aimimuliani Adam ◽  
Normawaty Mohammad-Noor ◽  
Ann Anton ◽  
Ejria Saleh ◽  
Shahbudin Saad ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Coastal Waters ◽  
Algal Bloom ◽  
Harmful Algal Bloom ◽  
Temporal And Spatial Distribution ◽  
Temporal And Spatial ◽  
Hab Species

Temporal and spatial distribution of the commercial shrimp Litopenaeus schmitti (Dendrobranchiata: Penaeidae) in the south-eastern Brazilian coast

2014 ◽  
Vol 94 (5) ◽  
pp. 1001-1008 ◽  
Author(s):  
Gabriel L. Bochini ◽  
Adilson Fransozo ◽  
Antonio L. Castilho ◽  
Gustavo L. Hirose ◽  
Rogerio C. Costa
Keyword(s):  
Spatial Distribution ◽  
Abiotic Factors ◽  
Capture Rate ◽  
Organic Matter Content ◽  
Organic Content ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Temporal And Spatial Distribution ◽  
Temporal And Spatial ◽  
Number Of Individuals

The goal of the present study was to assess the temporal and spatial distribution of L. schmitti in three bays of the northern coast of the State of São Paulo, Ubatumirim (UBM), Ubatuba (UBA) and Mar Virado (MV), over a period of two years (1998 and 1999). Abiotic factors were monitored to test their influence on the distribution of the species through redundancy analysis. The shrimp were captured using a commercial fishing boat equipped with double-rig trawling nets at six sampling points. A total of 5658 individuals were collected during the study (4437 and 1221 in the first and second years, respectively). The number of individuals differed between years, bays, seasons and sampling locations. The highest number of L. schmitti was collected in MV (N = 2747), followed by UBM (N = 1649) and UBA (N = 1262). Shrimp abundance correlated positively with organic matter content, salinity and temperature, with the highest number of individuals collected from sites with intermediate levels of organic content (4 and 6%) and increasing when the sediment had a higher proportion of fine and very fine sand + clay. Abundance was also associated negatively with rainfall, given that the analysed population showed a seasonal pattern, with an increase in capture rate in those months following the rainy season. Average rainfall was 222.47 ± 138.68 mm, with a maximum of 538 mm and a minimum of 22.4 mm. The results obtained in this study suggest that, in the region of Ubatuba, temperature, salinity, organic content and rainfall modulate the distribution of these animals.

Temporal and spatial distribution of dissolved Cu, Ni and Zn in the coastal waters of Jeddah, eastern Red Sea

2010 ◽  
Vol 4 (7-8) ◽  
pp. 1229-1238 ◽  
Author(s):  
Radwan K. Al-Farawati ◽  
Mohammad O. Gazzaz ◽  
Mohammad A. El Sayed ◽  
Amr El-Maradny
Keyword(s):  
Spatial Distribution ◽  
Red Sea ◽  
Coastal Waters ◽  
Temporal And Spatial Distribution ◽  
Temporal And Spatial

Study of the Temporal and Spatial Distribution of Water Temperature in Ertan Reservoir Based on Prototype Observation

2013 ◽  
Vol 864-867 ◽  
pp. 2278-2287
Author(s):  
Chang Jun Qi ◽  
Bao Hong Lu
Keyword(s):  
Spatial Distribution ◽  
Temperature Distribution ◽  
Water Temperature ◽  
Air Temperature ◽  
Water Depth ◽  
Thermal Stratification ◽  
Ecological Environment ◽  
Temporal And Spatial Distribution ◽  
Temporal And Spatial ◽  
Monthly Variations

When a reservoir is built, it will change the hydraulic features of the natural river, and cause thermal stratification which has significantly influence on the reservoir area and downstream ecological environment. Through analysis of the temporal and spatial variations of the observed temperature in terms of the prototype temperature observations in Ertan reservoir, the preliminary conclusions can be gained as follows: the water temperature distribution in Ertan reservoir is basically represented as isothermal in the same depth plane, and as stratifies along water depth. The great monthly variations of water-temperature in the reservoir are affected by the air temperature obviously.

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