Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Introduction to Environment and Ecology Part 1.1
85,172 plays

This video deals with introduction to Environment and Ecology (EnE), includes all the major topics in EnE, terminologies, graphical representation of major biomes (where x-axis is mean annual precipitation and y-axis is mean annual temperature), list of abiotic factors, diffrent response of various organisms to these abiotic factors, definition of adaptation, its various examples and finally it culminates with explaining in detail the population pyramids. In this video, Dr. Roman deals with major topics like ecology, ecosystem structure and function, primary ecological succession, population interaction, secondary succession, biodiversity, IUCN Red Data book, biomes, Indian biomes, Interaction (Mutualism, Predation, Parasitism, Commensalism, Amensalism, Energy flow (Rule of 10% and how energy flow occurs in various pyramids – Primary, Secondary, Tertiary), Nutrient cycle (Nitrogen, Phosphorus, Carbon, Sulphur), Ecological Pyramids, Ecosystem services (Oxygen, Air, Herbs), Terminologies: Ecology (Haeckel & Tensliy): Organism, Relation, Environment, Ecosystem: Biotic (Living organisms) and Abiotic (Soil, Water), Ecad: Plant species, same genetic stock different physically, reversible, Ecotype: Plant species, inter fertile, genetically different, irreversible, ecological succession (transformation from primary [lichen] to complex species [climax species], primary: no life, secondary: living organisms were already there, Serule – ES for micro organisms), Autecology: Individual, Synecology: Group/community, Edaphic: Soil, Therms (Mega: High Temp. Rain forest, Meso: High + Low Temp, deciduous forest, Micro: Low temperature, Mixed coniferous, Hekisto: Extemely low, Alpine), Ecological niche: Physical + Functional role of a species in a community, Ecological equivalents: Similar niches in different geographical regions, Graph on distribution of Biomes, 11 Biomes, Abiotic factors (Temperature, Water, Light, Soil), Responses to abiotic factors - Graph (Regulators, Conformers, Partial regulators, Migration, Suspension), Adaptation: Definition (Process + Trait), Examples of Adaptation (Allen rule [Cold – small extremeties], Tag polymerase [DNA – Thermostable, PCR - Mullis, DNA amplification], Chaperone proteins (survival in cold temp., prevents freezing of proteins), Cam pathway [leaves into spine, Cactus, Photosynthesis in night], Kangaroo rat [Water from Fat oxidation, concentration of urine], Altitude sickness [Increase in RBC, Hb increase – compensation of O2 in environment], Population pyramids [Expanding, Stable, Declining] Graph – Pre - Reproduction, Reproduction, Post-Reproduction. For any query or doubt, visit Video by Unacademy for IAS Preparation. How to prepare for IAS exam, Best IAS Coaching, IAS Civil Services Syllabus, Study Material for IAS Exam, IAS Civil Services Exam, UPSC Preparation, Tips for IAS, Material for IAS Preparation, UPSC Exam Material, IAS How to prepare, Other good resources: Mrunal and Clearias , IAS preparation tips, How to prepare for IAS 2015

Roman Saini is teaching live on Unacademy Plus

Roman Saini
Part of a great founding team at Unacademy with Gaurav, Hemesh. Movies, Guitar, Books, Teaching.

Unacademy user
well Explain mam. . .
sir please make more video . these are very helpful for those who can not afford coaching like allen or akash. sir my aim is to be a aiims doctor . so sir please please please make more videos for aiims and neet. you are the best sir and i hope that you will understand the feeling of those student who can not afford coaching institute due to money problem and i am one of those . so sir please make more video so i can be a doctor and give credit to you. thank you sir
i really wanna thanku for such a great initiative that is being carried out by unacedemy really helping a lot of people who cant afford coaching especially and even helping the ones who are serious in their preparation.......thanku sir for ur great effort that u have made for us......words are not sufficient to express my views .....agar words se kuch jayda hothe hai na sir woh sirf ap ko deserve karte hai........this online coaching platform is really veryyyyyyyyyyyy helpful..thanks to u and to ur team.....
very useful. it wll complete myenvironment part forUPSC. thanx. please conitnue making these videos
First yes Sir Please keep making any many vidoes as you can because you know each one of eagerly wait to find all solution from one single source and you seem to be the key to our path of preparation. Second the name of grasslands in different region of the earth as googled by me is as follows: Asia : STEPPES. North America: PRAIRIES. South America: PAMPAS Africa: SAVANNAS. Australia: RANGELANDS. Thanks a lot sir.
Alls Cram
2 years ago
Thank you
Shwetabh Singh
2 years ago
Thanks bro
thank...u very much sir.... its a very nice expln. sir plz do a crash course on complete ncert geography...
Hina Siddiqui
2 months ago
Dear crash course on geography is available by roman sir
View More