:: Volume 7, Issue 25 (9-2016) ::
2016, 7(25): 49-60 Back to browse issues page
The Impacts of the Ecosystem Hypertrophication and Climate Changes on Thrive of the Jellyfish in Shatt Al-Basrah Canal
Ali B. Mahmood , Imad J. M. Al-Shawi , Hazem A. Al-Sayab , Sejad K. Jasib , Zuhair A. Abdulnabi , Nadia K. Muhsen , Yosra J. Alewi
College of Marine Sciences, University of Basrah, Garmat Ali Campus A, l- Basrah, Iraq
Abstract:   (2935 Views)
The present study (i.e. the first study in Iraqi waters) identified the causes of reproduction and
excessive growth of the jellyfish, which is known locally as thagolol, of the type (Catostylus Perez)
in the region of Shatt Al-Basrah canal, west of Basrah city. The reproduction and excessive growth
of jellyfish occurs in many estuaries and coastal areas in the world, which is a recurring global
problem in the context of climate change. The conducted study included measurements of dissolved
oxygen, electrical conductivity, total dissolved solids, pH, temperature, nitrates, phosphate, quality
and quantity of phytoplankton during the dominant of :the northwest winds; the neap tide and
during a full tidal periods in October of 2018 and March of 2019. The results showed that there
were thrive of jellyfish by huge numbers in Shatt Al-Basrah canal. The physical; chemical and
biological causes (i.e., the local causes), were identified, namely: (1) marine salinity, (2) water
column temperature stratification in the context of climate change, (3) an excessive increase in the
concentrations of nitrate and phosphate, (4) abundance of phytoplankton (i.e., dinoflagellate),
including Protoperidium sp. and Alexandrium; and (5) overfishing of fish. Hence, the absence of
any of these factors will lead to the absence of this type of jellyfish.
Keywords: Jellyfish, ecosystem hypertrophication, climate change, Shatt Al-Basrah canal
Full-Text [PDF 582 kb]   (1005 Downloads)    
Type of Study: Applied Research | Subject: Climate Change
Received: 2020/04/3 | Accepted: 2020/04/3 | ePublished: 2020/04/3

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Volume 7, Issue 25 (9-2016) Back to browse issues page