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8/20/2019 3 Ecology-DAY 3
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OVERPOPULATION &COMPETITION
DO NOW:
When diferent organisms tr too!!"# the same ni!he$ %hat is the
o"t!ome
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O'(ECTIVE)•
CONTENT: – DE)CRI'E ho% o*er#o#"+ation +eads to
!om#etition,
– DE-INE Carring !a#a!it and E.PLAIN %hat
ha##ens %hen it is rea!hed/e0!eeded,
– DE-INE +imiting 1a!tor and gi*e three e0am#+es,
• LAN2UA2E:
– Use ne%+ +earned !ontent *o!a3"+ar toe0#+ain %hat ha##ens %hen a #o#"+ationrea!hes or e0!eeds the !arring !a#a!it,
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Overpopulation !a"ses reso"r!es to 3e+imited,
Competition %i++ o!!"r among
organisms,,,One organism %i++ o"t!om#eteanother 4+oser dies or mo*es5,
W6AT 6APPEN) W6EN T6ERE ARE TOO MAN7 OR2ANI)M) IN ONE
NIC6E
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Po#"+ations %ith too man organisms %i++e0!eed the Carrying Capacity.
The CARRYING CAPACITY is the amo"nt
o1 organisms that !an s"r*i*e in ane!osstem 3ased on the reso"r!esa*ai+a3+e,
–
E.AMPLE:• In o"r 3a!8ard$ there are on+ eno"gh reso"r!es
41ood$ %ater$ she+ter/s#a!e5 1or 9 s;"irre+s tos"r*i*e, I1 MORE s;"irre+s !ome into the ard$
COMPETITION %i++ o!!"r,
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6OW ARE POPULATIONLEVEL) CONTROLLED
Po#"+ations are !ontro++ed 3 LimitingFactor.
LIMITING FACTOR! are 1a!tors in the
en*ironment that !ontro+ a #o#"+ation
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m t ng a!tors t at a e!tthe #o#"+ation si=e o1
organisms
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9, Carring Ca#a!it is e0!eeded,, Organisms die$ #o#"+ation de!reases,>, Reso"r!es in!rease$ #o#"+ation in!reases,?, )tarts a++ o*er again at 9,@This res"+ts in a cyclic c#ange o*er time,
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