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Showing posts with the label biogeography

Review of Youtube Documentary silence of Swastik - The Biggest Betrayal of 20th century

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I had the opportunity to tour cambodia and visit ankor Wat Temple complex, possibly the largest Hindu temple complex in the world in 2019. There I have often come across wrong interpretation of Hinduism. The wrong interpretations were there in Museums, delivered by tourist guides,etc. But most of these, I now realise was from ignorance, false narrative of western authors and historians on their colonies. I was also under the influence of the fact that the Swastik symbol was taken up by Adolf Hitler and when he came to power swastika became a notorious symbol. Even by European colleagues in my last company know that swastika was a Hindu symbol and it didnt mean that harmful to us Hindus as it was for Hitler. However, during all these times from when I 1st read about ww2 in class 7 until today, thanks to our education system. It never occurred to my or neither any teacher made me think:- 1) why a christian man - Adolf Hitler who was born in a village to a very low level middle class pare

detritus ecosystem

Detrius ecosystems are ecosystems which partially or fully depend o the dead organic matter produced in another ecosystem.Example:-Cave ecosystem.In certai subcomponents of the ecosystem,energy is derived from the detrius in the system obtained through decomposition as is the case with some autotroph based ecosystems. Decomposition is important for obtaining detrius through fragmentation,leaching but primarily by tyhe activity of organisms that may facilitate both leaching & fragmentation.However,it must be pointed that not all parts get decomposed at the same time or at the same rate,lignin decays more slowly than cellulose as an example.on the basis of the environment in which the detrius is decomposed it is subcategorized into the followinfg divisions:- 1)detrius decomposition in forest ecosystem; 2)detrius decomposition in grasslands; 3)detrius decomposition in chapparral; 4)detrius decomposition in deserts; 5) detrius decomposition in aquatic

pond/pool/bogs/lakes/swamps as an ecosystem

there are 3 broad categories on aquatic ecosystem:- a)Fresh water; b)Marine;and c)Estuarine. Together these 3 components compose 70% of Earth's surface 7 are diverse in their physical,chemical and biological components.Fresh water ecosystems cover 2% of earth;s surface.Eg.:-Lake supirior. Fresh water ecosystems are characterized by :- a)Havimg a running water(Lotic Ecosystem);and b)Stagnant water(Lentic Eosystem) Lentic ecosystems includes ponds/lakes/pools/bogs etc. and varies considerably in physical,chemical and biological characteristics.they can be considered to have 3 zones:- a)Littoral; b)Limnetic; and c)profoundal. Littoral zone extends from the shoreline to the innermost rooted plants successively passing from rooted emergent forms ,such as reeds and cattail,rooted species and is populated ,like water lilies and in deeper waters to various submerged but rooted species and is populated by snakes,frogs.A considerable variety of adult a

marine ecosystem

Mar i ne ecosystem which are of singular ecological significance occupy 70% of Earth's surface,with average depth of 3750m & salinity averaging 3.5%.unlike fresh water ecosystems ,marine ecosystems are continuous & is in continuous circulation via major surface currents , waves , tidal action, upwelling etc. In the absence of vertical mixing of the deep waters which constitute 60% of ocean stay permanently at 3(degrees)celcius. the concentration of nutrients in ocean is low.Hydrogen & oxygen form 96% of total ocean elements.   The major zones in marine ecosystems are litoral,neritic,pelagic benthic.   a) The litoral or inter-tidal zone :-It is subjected to physical violence of waves & tides & to fluctuations of temperature ,moisture & light intensity. Along rocky shores we find sandy shores organisms are adapted to burrowing in or adhering to sand like- ghost crabs, sand dollars etc. Mud flats occurring in Bays houses algae on the su

'limiting factor' concept

American ecologist G.Clarke defined limiting factor as that which "first stops the growth or spread of an organism".the origin of this concept is attributed to German chemist J.V.Liebig in his treatise-"Organic chemistry & it's Application to Agriculture & Physiology" where he noted," Crops of a field diminish or increase in exact proportion to the diminution or increase of the mineral substances conveyed to it in nature". His law of minimum applied to inorganic nutrients although it got modified with the passage of time to include physical factors, temperature & rainfall etc. as well.   F.F.Beckman extended the Liebig's law of minimum to encompass the limiting effects of the maximum as well which came to be known as the Law of Limiting Factor. He noted that in treating physiological phenomena, assimilation, respiration, growth & the like, which have a varying magnitude under the varying ex