Riparian vegetation: A corridor for environmental stability
August 21, 2010
Dr. Md. Mizanur Rahman
The word “riparian” is derived from the Latin word ‘Ripa’ (river bank).Vegetations bordering water bodies are technically known as riparian vegetations.
These vegetations are also called riverine or gallery vegetations as they are grown adjacent to or near rivers. Plant habitats and communities along the river margins and banks are called riparian vegetation, characterized by hydrophilic plants. Riparian vegetations form the transition between Read more
Assessing climate change impacts on floral diversity
August 21, 2010
Forest Mensuration
Assessing climate change impacts on floral diversity
Dr. Md. Mizanur Rahman
Forest Mensuration provides forest inventory, forest resource monitoring, measurement principles, stand structure parameters, different sampling methods and applications. It takes into account all the resources of a forest, including timber and non-timber vegetation parameters, natural regeneration, lesser vegetation, coarse woody debris, and carbon flux.
Permanent mensuration plots: Permanent mensuration sample plot provides the databank of the individual tree. It manages the network of permanent and Read more
Adopting European CORINE Land Cover concept
August 15, 2010
Environmental Assessment
Adopting European CORINE Land Cover concept
Dr. Md. Mizanur Rahman
Corine Land Cover (CLC) is a database of geographic land cover encompassing most of the European countries. It is based on interpretation of satellite images. Images acquired by earth observation satellites are used to derive land cover information. It provides comparable digital maps of land use pattern. This is useful for nature conservation and environmental analysis. The component of the CLC aims to gather information relating to environment on certain priority topics like human disturbances, land use pattern, naturalness, etc. CLC covers all activities related to Read more
Habitat loss, biodiversity loss
August 15, 2010
Dr. Md. Mizanur Rahman
Our planet is changing continuously, causing habitats to be altered and modified. Tropial and sub-tropial forests are always subject to destructive natural forces — cyclones landslides, floods, mud flows, volcanic eruptions, fire, drought, and climate change. These factors are overwhelmed by anthropogenic disturbances. These forests are being logged everywhere at a very high rate. Approximately 50% of forest lands have no forest coverage because of human activities.
Deforestation is not a recent human activity in the tropical forests. These were inhabited by Read more
Dewpara Sal forest: Past and present
July 18, 2010
Biodiversity
Dewpara Sal forest: Past and present
Dr. Md. Mizanur Rahman
SAL occurs on the southern slopes of the Himalayas in Nepal, India and Bangladesh. In India Sal occupies the northern and central regions separated by the Gangetic plain. Terai (low land) is considered as the main Sal growing region of Nepal. The major portion of Sal forests in Bangladesh is located in the central parts (Mymensingh, Tangail and Gazipur).
Sal forest is the most threatened and vulnerable ecosystem of Bangladesh. Until the beginning of the 20th century, these forests existed as a continuous belt with rich floral and faunal diversity. Gradually increasing population put tremendous pressure on this ecosystem and Read more
How will it respond to predicted climate change?
May 23, 2010
Kuakata Biodiversity
How will it respond to predicted climate change?
Dr. Md. Mizanur Rahman
KUAKATA, locally known as Sagar Kannya (daughter of the sea) is located in the southwest of Bangladesh. Next to Cox’s Bazar it is the second most famous sea beach of this country. And Kuakata is one of the rarest sea beaches of the world, which has a rare scenic beauty offering the full view of the rising and setting of crimson sun in the water of the Bay of Bengal. This 30 km long and 03 km wide beach has a typical natural setting and sandy as gently sloping into the Bay of Bengal.
It is 70 km away from Patuakhali district headquarters and Read more
Alien invasive species disrupting native biodiversity
May 8, 2010
Dr. Md. Mizanur Rahman
LANTANA is a native evergreen shrub to tropical America. It is now a major weed in many regions of the Palaeotropics where it invades natural and agricultural ecosystems. The plants can grow individually in clumps or as dense thickets, crowding out more desirable species. It may grow up to 6 ft high and may spread to 8 ft as a climber with the help of a support. Leaves and stems are rough, hairy and secrete an unpleasant odour like cat pee when crushed. In the tropics lantana is a non-stop Read more
Climate change: Disappeared South Talpatti, what next?
May 8, 2010
Dr. Md. Mizanur Rahman
The South Talpatti measuring 81 square miles in the Sunderbans has disappeared due to sea level rise and soil erosion. Its disappearance was confirmed by satellite image and sea patrols. Sugata Hazra, a professor from the School of Oceanographic Studies at Jadavpur University in Calcutta, told reporters, “There’s no trace of the island any more,” He noted Read more
Offshore Nijhum island: Overcoming climate change impact
April 24, 2010
Dr. Md. Mizanur Rahman
NIJHUM is an offshore island in the Bay of Bengal, located in the extreme south of Hatia island separated by Hatia channel. It is a scenic treasure trove having 20 kms long sandy and grassy beach. Accredited on the estuarine Meghna river and the Bay of Bengal, Nijhum is a virgin island constituted of intertidal mudflats and sandflats. The island is dissected by small creeks or canals and its centre part is under cultivation and human habitation. It is a cluster of several small accreditation mainly Char Osman, Char Kamla, Char Muri and Ballar Char.
It came under human settlement Read more
Climate change: Whispering from the Sunderbans
February 7, 2010
Dr. Md. Mizanur Rahman
Due to increased rate of emissions of greenhouse gases (carbon dioxide, methane, nitrous oxide, ozone and chlorofluorocarbons) from different sources such as burning of fossil fuels, deforestation and other human activities, the rate of global temperature increase accelerated from +0.6°C over the past century to an equivalent rate of +1.0°C per century in the past two decades (Natural Resource Defence Council, USA 2006). Sea-level rise as a consequence of global warming is caused by increase in seawater temperatures resulting in thermal expansion of water and melting of glacier and polar iceberg (Kennedy et. al. 2002). The climate Read more
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