Cyanobacteria of Bongaigaon, Assam, India

ISBN-13: 9783659915277 / Angielski / Miękka / 2019 / 88 str.

Ashoke Kumar Das

Opis

The Cyanobacteria or blue green algae are the pioneer oxygenic phototrophs on earth whose distribution around the world is surpassed only by bacteria. Cyanobacteria and similar organisms produced most of the oxygen found in Earth's atmosphere, which implies that early photosynthetic organisms would have lived in an atmosphere that was rich in CO2 and poor O2 (David et al, 2005). It was shown that three common cyanobacterial species can grow under conditions that resemble those thought to have existed on early Earth: very high pCO2 and low pO2. Fossil evidence points to their presence in geographically diverse regions during the Precambrian (2 or more than 3.5 billion years ago). They are a large and morphologically diverse group of phototrophic prokaryotes, which occur in almost every habitat on earth. This versatility may explain the remarkable lack of morphological (and presumably physiological) change seen in 3.5- billion-year-old fossilized BGA and their modern day counterparts (Adams, 2000).

O autorze

Das, Ashoke Kumar
Dr. Ashoke Kumar Das, a post graduate of Gauhati University and doctorate from the same university. He teaches Botany in Abhayapuri College since 2001. He is also an active member and coordinator of West Assam zone of Aaranyak, which is one of the leading organisation of biodiversity conservation in North East India.