TOFG-all

(Marcin) #1

Soil Biology & Ecology


Part 2 – 92 | Unit 2.3
Lecture 1: Soil Biology & Ecology


 t 4NBMMBOJNBMT BDFMMVMBS
MJWJOHJOXBUFSöMNT


 t &ODZTUNFOU IJCFSOBUJOHJOBDZTU
%JTUJODUJWFSFTQPOTFUPESZJOHPVU


 t *OIBCJUUSBOTJUPSZFOWJSPONFOUT
TPSFQSPEVDFSBQJEMZ



  • Colpoda divide once or twice per day at 12oC


 t 4FWFSBMEJTUJODUUZQFT



  • Ciliates have fringe of small hairs used for locomotion

  • Amoebae have an amorphous body shape

  • Flagellates have a whip-like tail for locomotion


 t 'VODUJPOBMSPMFT1SFEBUPST FH
PGCBDUFSJB
PUIFSNJDSPPSHBOJTNT


EFDPNQPTFST
(feed on detritus)


ii. Nematodes (1/500 inch in diameter, 1/20 inch in length)


 t (MPCBMEJTUSJCVUJPO


 t 4PJMBCVOEBODFNJMMJPON^2


 t 0VUFSDVUJDMFQSPUFDUTSFTJTUBOUUPUPYJOT


 t 'VODUJPOBMSPMFTJODMVEF.JDSPCJWPSFT
PNOJWPSFT
QSFEBUPST
TPNFQBSBTJUFT 


 t "CVOEBOUBUTJUFTXJUIIJHI0.DPODFOUSBUJPO


iii. Rotifers (1/50 to 1/120 inch long)


 t .VMUJDFMMVMBS
UIPVHITUJMMNJDSPTDPQJD


 t -JWFJOXBUFSöMNTPONPJTUTPJMTPOFPGNPTUBCVOEBOUUBYBJOUIFUPQMBZFSPGTPJM
or litter (32,000 to 2 million per m^2 )


 t $BOVOEFSHPBOIZESPCJPTJT TVSWJWFESZJOHEPXOCZGPSNJOHBDZTU


 t 1SJNBSZGFFEJOHTUSBUFHJFT(SB[JOHUIFCBDUFSJBMöMNPO40.PSPUIFSQBSUJDMFTPS
filter feeding on bacteria, yeast, and algae in the soil water


 t 'VODUJPOBMSPMFT)FSCJWPSFT FH
POBMHBF


EFDPNQPTFST GFFEPOEFUSJUVT


iv. Tardigrades (1/25 inch)


 t .VMUJDFMMVMBS
UIPVHITUJMMNJDSPTDPQJD


 t 5FSSFTUSJBMUBSEJHSBEFTMJWFPONPTTPSMJDIFO


 t $BOVOEFSHPBOZIZESPCJPTJT TVSWJWFESZJOHEPXOCZGPSNJOHBUVO


 t 1SJNBSZGFFEJOHTUSBUFHJFT4PNFVTFTUZMFUTUPQJFSDFNPTT
BMHBF
QSPUP[PBOT

rotifers or nematodes and suck out fluids; others consume whole microfauna


 t 'VODUJPOBMSPMFT)FSCJWPSFT
QSFEBUPST


v. Functional roles of microfauna do not include shredding of organic matter into
smaller pieces


c) Mesofauna


i. Potworms (Enchytraeida, 1/50 to 2 inches long)


 t 4NBMMBOOFMJET SFMBUFEUPFBSUIXPSNT


 t 5PMFSBUFQ)


 t 5IPVTBOETN^2 in high organic matter soil


 t /PCVSSPXT


 t 'FFEPOGVOHBMIZQIBF
NJDSPPSHBOJTNT
GFDFT


ii. Collembolans (springtails, 1/100 to 4 inches long)


 t 4NBMMBSUISPQPET SFMBUFEUPJOTFDUT
XJUINJUFT
UIFNPTUOVNFSPVTTPJM
arthropods


 t -JWFJOTPJMBOEMFBGMJUUFS


 t )VOESFETUPUIPVTBOETQFSIBOEGVMPGTPJMIJHIJO40.


 t 'FFEPOGVOHBMIZQIBF
CBDUFSJB
EFUSJUVT

Free download pdf