Phytoplankton structure, composition and production in saline water-bodies in the Lower Amu Dar'ya

1997 ◽  
Vol 6 (3) ◽  
pp. 217-231
Author(s):  
Olga V. Babanazarova
Keyword(s):  
Saline Water ◽  
Water Bodies ◽  
Phytoplankton Structure

Response of phytoplankton to heavy pollution of water bodies

2020 ◽  
Vol 49 (3) ◽  
pp. 267-280
Author(s):  
Tatyana Shevchenko ◽  
Peter Klochenko ◽  
Inna Nezbrytska
Keyword(s):  
Inorganic Compounds ◽  
Water Bodies ◽  
Dimensional Structure ◽  
Taxonomic Structure ◽  
Biomass Structure ◽  
Dominant Complex ◽  
Phytoplankton Structure ◽  
The Status ◽  
Nature Park ◽  
Heavy Pollution

AbstractPhytoplankton structure was studied in five ponds (located in the Oleksandriya Nature Park, Ukraine), which significantly differed in the level of their contamination. The concentration of ammonium (NH4+-N) in the studied water bodies was 0.02–74.00 mg l−1, of nitrite (NO2−-N) – 0.002–1.750 mg l−1, nitrate (NO3−-N) – 0.13–58.00 mg l−1, inorganic compounds of phosphorus (Pinorg) – 0.041–0.160 mg l−1, chloride (Cl−) – 35.4–560.5 mg l−1, whereas the content of organic matter (PO and DO) – 4.4–10.4 and 18.0–81.0 mg O l−1, respectively. It has been found that the response of phytoplankton to heavy pollution consisted in changes in its species richness, taxonomic structure, species composition, quantitative indices, numbers and biomass structure, dimensional structure, pigment index, dominant complex, as well as changes in its ecological spectrum. Individual divisions of algae differed in their response to heavy pollution of water bodies, which was conditioned by the specificity of algae metabolism. Bacillariophyta and Cyanoprokaryota proved to be more sensitive to contamination, whereas Chlorophyta and Euglenophyta – more tolerant. The obtained data can be used to monitor the status of water bodies and their biota and to determine the type and intensity of contamination.

scholarly journals GIS Based Land Use Change Analysis of a Coastal Area of Bangladesh

2019 ◽  
Vol 6 (2) ◽  
pp. 123
Author(s):  
. Asikunnaby
Keyword(s):  
Land Use ◽  
Natural Hazards ◽  
Coastal Area ◽  
Saline Water ◽  
Shrimp Farming ◽  
Water Bodies ◽  
Land Resource ◽  
Salinity Intrusion ◽  
Change Analysis ◽  
Shrimp Culture

Satkhira is a coastal district of Bangladesh where lives of millions of people are transforming due to natural hazards and anthropogenic stimuluses, specifically water bodies are facing the bulk of the transformation owing to salinity. The study area of this research includes part of Satkhira Sadar and the work is done based on Betna river influenced zone. Sundarban and the Bay of Bengal are close to this river and its highly influenced by saline water. The natural pristine environment of the area went through major changes during the last few decades, especially after the 1980’s because of human interventions as well as natural causes. This research was an attempt to find out the transformations that took place in the area with remotely sensed imagery of 2018 and toposheet map of 1982, the underlying reasons of change and their consequences. The collected data were analyzed with Remote Sensing and Geographic Information System (GIS) software’s for better interpretation and an in-depth understanding. Features which came into consideration frequently are river, shrimp farms, settlement, agriculture, embankment, salinity intrusion, increasing population, frequent hazard and riparian vegetation. The outcome of the work tells that the change in land use occurred mainly because of shrimp farming and salinity intrusion while Betna river took the major blow. Although economically beneficial, shrimp culture created a saline environment and modification of water bodies resulted in frequent waterlogging and escalated salinity in the area previously known as freshwater zone. While Bangladesh is scare in land resource, the coastal area such as the study site of this research is even more stressed owing to climate change and recurring natural hazards. Propositions are made at the end of the work to use the presented data and information mentioned in this study by corresponding authorities.

scholarly journals Land Cover Change Analysis Around the Sundarbans Mangrove Forest of Bangladesh using Remote Sensing and GIS Application

2013 ◽  
Vol 9 (1-2) ◽  
pp. 95-107 ◽  
Author(s):  
MR Rahman ◽  
S Begum
Keyword(s):  
Land Cover ◽  
Land Cover Change ◽  
Saline Water ◽  
Shrimp Farming ◽  
Water Bodies ◽  
Fallow Land ◽  
Change Analysis ◽  
Mangrove Vegetation ◽  
Fallow Lands ◽  
Total Study Area

Land cover change is a widespread and prominent feature in Bangladesh. It is more energetic in the South-west coastal region such as Khulna and Satkhira region. The research was completed by 30 years (1980 to 2009) by using four Landsat satellite images (1980, 1989, 2002 and 2009). During research it was originated that the main classes of changes were homestead, fallow land, water bodies and mangrove vegetation in the study area. The most imperative change was observed in fallow lands (the types of cultivable lands with or without any standing crops and also uncultivable lands). Fallow land was decreased, concerning 2,259 sq km in 2009 which land was 3,867 sq km during in 1980. It was dropped 49% to 29% of total study area between the years of 1980 to 2009. The water bodies were increased about 10% in those 30 years, regarding 14% to 24%. The total water bodies covered 1140 sq km at 1980 which was increased 1851 sq km during 2009 in the study area. The sea-level rise, increasing salinity and availability of less fresh water are responsible for inland intrusion of saline water and creating favorable environment for shrimp farming in the region. As a result farmers are converting fallow lands to shrimp farming which is economically very beneficial. Important agricultural and non-agricultural lands also converted by homestead intended for increasing population of Bangladesh. There was only 398 sq km (only 5%) area covered by homestead during 1980. But the homestead covered area was increased about 1490 sq km (19%) at 2009. So, compared to the last 30 years 14% homesteads land cover areas are increased. There was not any astonishing changed in mangrove vegetation. Some mangroves areas were shattered and some other mangroves were full-fledged again in delta areas. The harmful land cover changes are not expectable for the natural environment. But it transpires by many natural and anthropogenic tricks now a day. So, the authority should seize initiatives to protect this category of catastrophe. DOI: http://dx.doi.org/10.3329/jsf.v9i1-2.14652 J. Sci. Foundation, 9(1&2): 95-107, June-December 2011

Effect of saline water bodies on the hydrogeochemical evaluation of groundwater at Kalpakkam coastal site, Tamil Nadu

2013 ◽  
Vol 82 (5) ◽  
pp. 535-544 ◽  
Author(s):  
H. Seshadri ◽  
R. Kaviyarasan ◽  
P. Sasidhar ◽  
V. Balasubramaniyan
Keyword(s):  
Tamil Nadu ◽  
Saline Water ◽  
Water Bodies ◽  
Coastal Site

scholarly journals Comment on “On the concept of evaporation from fresh and saline water bodies” by I. Steinhorn

1992 ◽  
Vol 28 (5) ◽  
pp. 1491-1491 ◽  
Author(s):  
Atul M. Salhotra ◽  
E. Eric Adams ◽  
Donald R. F. Harleman
Keyword(s):  
Saline Water ◽  
Water Bodies
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