OAIAISDMearCommonmad tarsiepopulzationsarealso10subject toapproximateiyconstantrtesonortty二100ANS102030LCVerSLcferrereCEiDOseCI
ECOLOGTCONEPISANDAPPLICATIONSFOPUILATIONDINAICSHigh Mortality AmongtheYoung
➢ High Mortality Among the Young
Ina population of Cleome droserifoliaThevertical scalehasbeenonly39plants survive to l year of ageextended so thar survivorsoutof eachlmillion seeds.appear on the graph1million品100.00SoN10.000AhmadHegazy(1990)1.000Cleome droserifolia,a desert shrub100101806040020Age (years)FIGURE 8.5Ahigh rate of mortality among the young ofaperennialplan population (data fromHegazy1990)
Ahmad Hegazy(1990) Cleome droserifolia, a desert shrub
ECOLOGT:CONCEPISANDAPPLICATIONSFOPULATIONDINAICSThreeTypes of Survivorship Curves
➢ Three Types of Survivorship Curves
IntypeIsurvivorshipjuvenile survival ishighand mostmontality oecursamong olderindividuals1.000In contrast,individuals inapopulation withtype Il survivorshipSosOdie atequal rates100regardless of age,11Individuals showing10type Ill survivorshipdieat ahigh rate asjuvenilesand then atILmuchlowerrateslaterin life.oldYoungAgeThree npes ofsuvivorship cunesFICURE8.6