Ecosystem Short Notes, Lecture notes of Botany

In these you can clear all your doubts and find ease to learn Ecosystem topic

Typology: Lecture notes

2025/2026

Available from 01/31/2026

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ONE SHOT + ECOSYSTEM cunctonal unit of Nature. — mrificial Ecosystem. |3 Phytoplankton Aquaman cee > Some aiagee > Flothing submerged > Marginal Plant Found ct edges, > O Forest *(Consumers)< ana at) © arassiand 2ooPlank tan ® Desert Pree gwimmin : > © pond [Moving] @wertand River ® cave _ TMP line: conversion of | t . deqradian Ecosystem 7 bottom dwelling forms. inorganic ecean into organic materiqy ith the heip OF vadiant energy of the sun by dh STRUCTURE :- autokvophs . Productivity Mi organic mateyign od aokr ane CEETETCTLIy wy ond bile by Heterotophs. Food chain /uweb NUbient evening ERECT: : io ion is cate ® (Ourpur Rate of biomass moduchon is called Productivity. (URIES!~ 9°? 49", CKeat enr2)) | t £ 1 im YoducHut Secondary " ig . ‘i Produchivity Prodliclvily divta to Abiotic Biotic [OP Cayoss primary pvodu chivity } *Inlerackon between Abiowc and bioic is called ecosystem. i ST RATIFICATION|- VerHoa) digtribubion fa (RPP) NPP CNet pyimery Productivity) 4 CF different Species occupying Rate of Producnon Amount oF utilised eq: tii] Energy Floeo W) decomposition iv] Nurvient cyciing diFFOL levels . OF organic matey bY Plants in vespiy : urin akon OPP-R=wpp R= TesPitation tasseq * Secondary Producti) " Pldilabie Por dhe consumpHon 40 heteva tophs Cherbivoyes 4 aecomposers) “ Rate oP @ Pormahen oF new Organic matey bY Consumer. “ A PREMARY PRONUCTIVITY DEPENDS ON © Plant species inhabiting a particular area. ; ® vaviery of environmental Factors © Avaitabitity of nubients @ photosynthetic capacity of plants. * The Annual Net primayy Productivity hole biosphere is approvi mately He bilion tons oF organic matter. A The producHvity of the oceans 4 oceans ave omy $5 billion tons. Rest of course. “@ DECOMPOSITION : Break down complen ovganic mober inte inorganic substan ces like catbon dionide ,coutey and NUBIENES Ane process cated decmposineh * Dead Plant Remains Such a§ leaves, bank, Flower cmd dead yemuins of animals. including Fecal mutrey . consHtute detritus _ Raw_material Por decompo sixon) STPPES :- Detvitivores, eq: Earthwenm. 0 fFraamentinem- Lovge detites is. Converted into small derrites. @ - water Soluble inerganic SaltS deep into the soll and Jet precipitated. @ €atAALSED - Bacterial and fungal enzymes degrade dervibus into simpler Inorganic Substances OPORNECaKOD} --Humitication and MiNC*Elisaon occuY during de~omposinon inthe Soil. * AccumUlGHONs of a dark coloured AMOYPHOUS Substance called MS. HUMUS. HIGhIY Yesishunk » colloidal [mn napuve fF serves as a veservoiy of nubients- SPREAD +The Human further deqvaded by Some mihvobes and release inorganic nutrients occur by the Process KnowNas mineralisahon. DECompoSITION DEPENDS ON. ® onNgen --vequiving. ® chemical nature of debitus CiulmaWe condilon. * Climatic condinon . decomposiv¥on vate ig slower IF debits is vich in W9nin and chin - quickey'- if detritus vich in nihogen and water -soluble substances like Sugar. Soil_moistuve Temp] : + (warm x moiSF) CW FOY) Fe Faster Slow N3) ENERHY Flow:- FmP:- frcept Foy the deep sea hyd - thermal ecosystem - Sun is the onty Source of enevgy For all ecosyskem On Eavth. PAR (Photosynthetcatly active vadiavon) £ + z a ee Some by photosy tty Nhe bacteria Q st organisms are depe) Ndenk on produces divecriy | indivechy] [unidivectional Flow of eneyay) 40 mictbial action at an PHbremety and under is ee 9065 decompouinon * ONE MUSt REMerber - © tvophic level vepyesents q Funtional level Nok a species. @ species may occuPy move than Q pyramid oF biomass Fs ; one i i am J PYramid of energy — MWAYS Upyight. ee emer a ' 4 (rami oF numbe}- EY Spamow Eat seeds; Pruit Peas TROPHIC LEVEL (Primary consumer) wumbey of individ . Te (TevH y "| Secondary consumey wh ak insects — Y S and corms, Consumer a @ Alithe pyramids of number of eney Sc (Second yand biomoss ave upright. if ensumer) Y 3, S4,000 @ ath in number aig We, 709-006 ig i aa cig herbivoyves .. wg PP ® Also energy at c tower trophic tevel ~ peoauesy LLL LLL is ee owl Shoe ata higher leve] AL tramid oF Biomag)- a sharp decreage in |(ExCePHONS) blomass at higher trophic levels, -pyvamid.of energy iS alwo's | TroPhic. evel Dry weight cg m®)| upright - - in Ac “trophic level tothe newt tvophic level Ecological pyramids .- Tree T1pes. AY Pyram) mid of number urvight 4 iewud Some energy iS alwWOYs lost as heck Y, at each sep. Each bar inthe ener9y Wh, oes . change in Tesponse tO envivoOMeNF). UYDpWiNtta ee: <6 7 — — = \ Leads A ii Gnverted pizomid oF biomass: sman | Communi neay a Cauilieviam standing crop oF Phy toPlaniiton supports . i . lavge Standing crop of zooplanuton, cotth she environment is called climax community. « WY» \- y “Gradual & Farly predictable Cehange in species) composiNon 1S called ecolsgical Succesion Aquatic - inverted. BS (an ideal id of enevg -otways 7 j 3 GA Taeat pyramid o TU verge. | [Teene sequene of cna Sthay sucessivery change in_a given aveg is catied seve. GES; Loone: SUCCESSION Lt” Succession ‘ a, Eq:- newly cooled tava, barre 1OCK, newly created pond Mesewoiy Ae . SUCCESION [5 Stowey as iF atalves milion oF Yeay Po% soil foiraukon efin in ayeas cohere natural hiowe communities have been destyvoyed Sucha Ferrrmands , burned ov cut Forest , Flooded land. = —— Succesion ate if Fuster because Some Soil oY Sediment is Fost. J jSUCCeSiOn whether taking place in | koatey OY on land , proceeds joa | [simitery Climan_communily - The mesic \QUCCESI ON OF PLANTS\- [Based on Habitat r S[HYORACH (hake place in very Wek aveds) pvenae —> mesic al tum Cvevy dry area) XERIC —) MESIC +The species that invade a bave cre called Pionner species. wERac Sec earn HYDRACH SuCCESION KERACH CUCCESIO PIONEER SPECIES] —|invade a base be) — [Bma_phy to planlctons | [Rooated Submerged plants] (Rocked Floated angiosperm) i (Free — Ficating plants) {rtatsh - meadow scrub) Bld Tees water body —a cand.) Rock >, Lichen. area) usually : NET] Smal PTO ages oat aid HKe rvophetes hic [ASSO Tog Pg Can be holded in tes wheal? & Soll uaniity informawan, Guceeded by bigger PlaTTS) Sable Climare , community , Poresy Remains stane +l! event 1S unchanged frerophyte —> meso PhYHC]