July, 2021

• 11 July

  Titan Arum: The Corpse Flower Feels Rotten

  

  When it comes to something about flowers, we can automatically feel a nice aroma around us. Because the flowers contain such nice fragrances that flutter our hearts. But what if there is a flower from which you can sense ‘Death’? Isn’t it really horrible to feel a deadly smell from …

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• 10 July

  Test of Significance

  

  Test of Significance The mathematical methods by which the probability of relative frequency of an observed difference occurring by chance, is found, are called tests of significance. It may be a difference between means or proportions of sample and universe or between the estimates of experiment and control groups.  Thus, …

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• 7 July

  Classification of Bacteria

  

  We all agree that classification and taxonomy of organisms are desirable and necessary in cases of biological work. But, there is much disagreement as to the best method of classifying and naming living things. The zoologists and the botanists have arranged matters in their fields fairly satisfactorily, largely on the …

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June, 2021

• 21 June

  Marine Phytoplankton: Productivity, Food Chain & Factors

  

  Pasturage of the Sea The vast ocean water is about 99%, of which usually up to 200 m depth or beyond (up to 300 m, depending on the latitudes, seasons, and water transparency) phytoplankton grow constituting “pasturage of the sea”.  Their photosynthetic activity contributes about 80% oxygen in the atmosphere …

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• 12 June

  Introduction to Marine Botany: Plankton

  

  The word ‘plankton’ has been derived from a Gr. word ‘planktos’ means drifting. So, plankton is those microscopic aquatic organisms or drifters whose movement is mainly driven by water currents, waves, tides, etc. Plankton can be two types- zooplankton, and phytoplankton. Although, some of them might possess some kinds of …

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• 12 June

  Marine Botany: Oceans, Seas & Bay of Bengal

  

  Marine Botany is the study of aquatic plants and algae that live in oceans, seas, intertidal zones and even in brackish water (more saline than freshwater but less saline than true marine environments) of estuarine zones. It is a combined branch of marine biology and botany. According to Wikipedia, Marine …

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• 11 June

  Nori Cultivation

  

  The cultivation of nori started about 300 yrs ago around the coast of Tokyo Bay and developed gradually in many localities Bundles of twigs of trees such as oaks, cherry, etc. were set in rows on the ground as the collectors, to which nori spores attach themselves and grow. In …

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• 11 June

  Seaweed Cultivation & Algal Industry

  

  Of the global seaweed harvest, 85% – 95% goes to the food industry and is worth approx €4.1 billion per annum (p.a.). The most valuable crop produced by seaweed aquaculture is Nori – Porphyra – a red seaweed or alga. The value of this crop is around US$ 2 billion …

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• 11 June

  Toxic Algae & Human Health

  

  Algal toxins are toxic substances released by some types of algae when they are present in large quantities (Blooms) and decay or degrade. These toxins are called ‘Phycotoxins’ (from Greek, phykos, “seaweed”; and toxikon, “toxin”). They are usually complex allelopathic metabolites produced by algal secondary metabolic pathways. These metabolites are (in most cases) not harmful to …

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May, 2021

• 16 May

  Protected areas of Bangladesh

  

  There are 19 protected areas in Bangladesh, covering 2,458 sq. km and representing 1.68% of the land area (FD record as on July 2007).  The Forest Department has the mandate for the management of these protected areas.  The protected areas are declared in the country under the “Bangladesh Wildlife (Preservation) …

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