Abstract
<p>Bangladesh is the largest delta in the world. Geographical location and seasonal diversity have made this country unique. Tanguar Haor as a Ramsar site is famous throughout the world with a reservoir of aquatic biodiversity. Due to availability of water flow throughout the year it has reached biodiversity compared to other haors in Bangladesh. In every winter, this haor becomes sonorous with the presence of thousands of migratory and resident birds. A lot of aquatic plants are floating and some are submerged. These aquatic plants decompose with seasonal shift and make the soil fertile. Numerous organism with food and shelter provided by these aquatic plants. Various species of amphibians and reptiles can also be seen in this vast haor. It has merged with the life and tradition of local people. Also human habitation has increased around the haor since the middle of the last century. About 12,870 ha water body have lost from 23,230 ha during last 60 years. Per year, 1.17% of water body have been lost in Tanguar Haor from 1955 to 2015. As a result, population of birds and wildlife is decreasing alarmingly due to the disturbance in the natural balance of the wetland ecosystem.</p>
Highlights
The term "haor" is the collective term of marshes, swamps, bogs and similar areas in aspect of Bangladesh as a floodplain dominated country
To attain the aim and objectives of this research, three-track methodology had been used for four time intervals, while in the first, secondary literature was reviewed to find out the relevant data about Tanguar Haor
There have analysed the trends of spatial changes of the Tanguar Haor
Summary
The term "haor" is the collective term of marshes, swamps, bogs and similar areas in aspect of Bangladesh as a floodplain dominated country. It is used for conventional term of wetlands in north-eastern part of Bangladesh, Sunamganj, Habiganj, Moulvibazar, Sylhet, Netrokona and Kishoreganj Districts. The "Tanguar Haor" one of the largest of them, is located in Tahirpur and Dharmapasha Thana of Sunamgange. This haor basin contain must be considered as a unique ecosystem of national and international importance. According to the development and growth of the population these haor area
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