RESEARCH Species persistence and extinction following
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A lS:l 1iI~"lIl 0".1.0 ~~ 0 ':. 0 ~ 0 ~'. 0 :" 0', i\h:-."J Unl'rtl's1ty of California, Dept. of i1olo11 Ol16. La Jolla, U '20U-Ollb, lTJ. Ibl9) ~)'-2)7) USA UII'e&r.'Il II ;"~":11 o ~';';.n~, o.~r.V Uilitrol o ir.-':.IW.b • r.:"u..w",l~:I oi. :I'J Species persistence and extinction following rainforest fragmentalion at Chiew Larn, Sural Thanl Province, Thailand. AD!OAY J L)"n.m Suumol Srih·.n .Ad D.yid S. WoocIruff D"''''''.nl of Biology 0116, lJ..lv... il)' of Califor.ia, S•• Di.,o, La Jolla, CA.,U.S.A. 92W3'()116 fo'tli f"Emulllion .,Ules i.obl.d rllches of fo,... from f",muly t(\DUMIOVI hahilll_ Empirical srudiu of rorcsl fra,mtnlS documenl &he lou of Nodivcnity (oUo"oinC isolalioL Mos.1 studies of Ibis prOCU$ arc. nl""ed, bo_--cyc.r. II abcy . uc done. decades IflU the hahilat (ralmeDtllion ee.. ned .nd Ih. Dum!>u. ..d Iypes of .p.cies 110... ori,in.lly il ,CMUU,. "nlDO. a. ]ft contraIl, .. c arc able 10 0""(011'& &lib deficitnc), II 'Iady .itu i. SWII n.ni Province ,,·h... tho f.una ,.... .un'.y.d !>)' Seub N.kb ... lbi.n ODd S... ·.I W•• ,hon". durin& lit. ..lu.1 p.riod of b.hilll ".,m.nlllion. Tit. eomrl.11o. of the Ihjjlpnbbb. D.m i. 1956 nGOd.. 165 km 1 (103.125 nil of 10,,·I.nd tropical (orul .nd crul.d ·rl"o.im.lcly ISO i.land. of fo,mer hilltops in Kblon, S•• n, Wildlif. S....... I")'. Thes. n.... flinfO'''1 i.land. rro,·id. .n ideal situllion in "'irirlI 10 oh.c"". Ih. loss of bioc!iver.i1)' durin, Ibo .. ili,,1 flUl f .... l'"'' follo...ln, habitll f.. ,mt.llliOD. "'c arc usin, ccalo,ical and trnclie Iccbniquu to me...we Ihc lou or bloilho(rsil)' (,om lit. bl.nds '1 Khlon, S... , b,. fo.o.in, on .m.n pound d.'dIM, mammals. Smal1 mammala arc usy 10 CCD'UI and arc imronanl co..poaonts o( Ih. eco,),uom IS th.,. form ,b. bui. of the m.mm.li.. food cbaill.. U.ln& li" .... plur. lechniqwu "'.. h,,·. <on••Jed II island. nn,in, iD .ile from less Ih'. I h. 10 0"" 100 b. for sp.ci.. numh.rs ODd .ha.4u<.. .nd compar.d Ih.m ",·itb II .qul ... I•• 1 .iled 1'1011 iD -uD4il1.,hcd (or~11 ()n 1he adj.cenl mainland. Jl Dllivt 'puies .... ere uct'f4cd inCludiD, ,",ound roden.s. I lrec moun, I trce-shrew, IDd "ound ..bJcW1. Species flulDhers on bland. nncrct (rom 0 1<' 7. A c.onlrarbon or i,l.84 Ind mainlineS 'pecits numbers Ih(1~·cd mil arlet . c$ ye." folk\ ...in, f.. , ... nlllion (Ippro.imllol)' 10·15 ,cnerllion. f"r Ih.. e Irccies). malDmalian speciu richness is li,DincanlJ), Jo. cr on the islands (omr lfcd 10 the m.inl.nd plots. A s.. ond 'prrolth is 10 m.. ,uIC Ihc ,.n.lic ".,i.I>ilil)' of sm.n m.mm.1 popub.ions _'hich occur (In tbe hllnd.. lnhrc.cdiDI and ,tntlic drif' in uc. ru,mt.nltd poruhtion )O. tlS ,cnr'ic '"ariahilily and caD Iud 10 cllirpa'ion. Usin, tissue umr)u from a rodenl, J.{(!~o"'yJ ""'I,t Ind a lr!t "hrc...', TtlpDiO "b ..... t. art c.lmiDinl variation in peR. amrJified ••qu••ctl of milo<IIondrill D~A from i.l.nd populalions .nd (Omr arin , .hUD with ml inland (onuol IImplts. In ,ddilion '0 ihese ua Ind Eenttic e((uts ... -e are abo tumin;ng the effecls of comp.lilion from inlloduced IIts on Ih. population ,·i.biliIY (If the Dativt. "ruin. Our "Iudiu of Iht. c."linclit'n proctSs in "man mammals Ire Ide' .nt 10 the m.n'J;cmcnl of Thailand's Jar,cr cndan,cud ",.c.ciu .nd hi,hly f.. ,mcnlcd I>iodh'cnily ,(n.lll1y.
Transcript of RESEARCH Species persistence and extinction following
132. Lynam, A.J., S. Srikwan and D.S. Woodruff. Species persistence and extinction following rainforest fragmentation at Chiew Larn, Surat Thani Province, Thailand. Science Society of Thailand, 18th Congress on Science & Technology. October 27-29, Bangkok. Abstracts. pp. 570-571. (1992l).
RESEARCH NOTE
A lS:l
1iI~"lIl 0".1.0 ~~ 0 ':. 0 ~ 0 ~'. 0 :" 0',i\h:-."J Unl'rtl's1ty of California, Dept. of i1olo11 Ol16.
La Jolla, U '20U-Ollb, lTJ. Ibl9) ~)'-2)7)USA
UII'e&r.'Il
II ;"~":11o ~';';.n~,o.~r.V
Uilitrol
o ir.-':.IW.b• r.:"u..w",l~:Ioi.·:I'J
Species persistence and extinction followingrainforest fragmentalion at Chiew Larn, SuralThanl Province, Thailand.
AD!OAYJ L)"n.m Suumol Srih·.n .Ad D.yid S. WoocIruffD"''''''.nl of Biology 0116, lJ..lv... il)' of Califor.ia, S•• Di.,o,La Jolla, CA.,U.S.A. 92W3'()116
fo'tli f"Emulllion .,Ules i.obl.d rllches of fo,... from f",mulyt(\DUMIOVI hahilll_ Empirical srudiu of rorcsl fra,mtnlS documenl &he louof Nodivcnity (oUo"oinC isolalioL Mos.1 studies of Ibis prOCU$ arc. nl""ed,bo_--cyc.r. II abcy .·uc done. decades IflU the hahilat (ralmeDtllionee.. ned .nd Ih. Dum!>u. ..d Iypes of .p.cies 110... ori,in.lly il,CMUU,. "nlDO.·a. ]ft contraIl, ..·c arc able 10 0""(011'& &lib deficitnc),II 'Iady .itu i. SWII n.ni Province ,,·h... tho f.una ,.... .un'.y.d !>)'Seub N.kb ... lbi.n ODd S... ·.I W•• ,hon". durin& lit. ..lu.1 p.riod ofb.hilll ".,m.nlllion. Tit. eomrl.11o. of the Ihjjlpnbbb. D.m i. 1956nGOd.. 165 km1 (103.125 nil of 10,,·I.nd tropical (orul .nd crul.d·rl"o.im.lcly ISO i.land. of fo,mer hilltops in Kblon, S•• n, Wildlif.S....... I")'. Thes. n.... flinfO'''1 i.land. rro,·id. .n ideal situllion in"'irirlI 10 oh.c"". Ih. loss of bioc!iver.i1)' durin, Ibo .. ili,,1 flUl f.... l'"''follo ...ln, habitll f.. ,mt.llliOD.
"'c arc usin, ccalo,ical and trnclie Iccbniquu to me... we Ihc lou orbloilho(rsil)' (,om lit. bl.nds '1 Khlon, S... , b,. fo.o.in, on .m.n poundd.'dIM, mammals. Smal1 mammala arc usy 10 CCD'UI and arc imronanlco.. poaonts o( Ih. eco,),uom IS th.,. form ,b. bui. of the m.mm.li.. foodcbaill.. U.ln& li" .... plur. lechniqwu "'.. h,,·. <on•• Jed II island. nn,in,iD .ile from less Ih'. I h. 10 0"" 100 b. for sp.ci.. numh.rs ODd.ha.4u<.. .nd compar.d Ih.m ",·itb II .qul ... I•• 1 .iled 1'1011 iD-uD4il1.,hcd (or~11 ()n 1he adj.cenl mainland. Jl Dllivt 'puies ....ereuct'f4cd inCludiD, ,",ound roden.s. I lrec·moun, I trce-shrew, IDd "ound..bJcW1. Species flulDhers on bland. nncrct (rom 0 1<' 7. A c.onlrarbon ori,l.84 Ind mainlineS 'pecits numbers Ih(1~·cd mil arlet .c$ ye." folk\ ...in,f.. , ... nlllion (Ippro.imllol)' 10·15 ,cnerllion. f"r Ih.. e Irccies).malDmalian speciu richness is li,DincanlJ), Jo.·cr on the islands (omrlfcd10 the m.inl.nd plots.
A s.. ond 'prrolth is 10 m.. ,uIC Ihc ,.n.lic ".,i.I>ilil)' of sm.n m.mm.1popub.ions _'hich occur (In tbe hllnd.. lnhrc.cdiDI and ,tntlic drif' inuc. ru,mt.nltd poruhtion )O.·tlS ,cnr'ic '"ariahilily and caD Iud 10cllirpa'ion. Usin, tissue umr)u from a rodenl, J.{(!~o"'yJ ""'I,t Ind alr!t·"hrc ...', TtlpDiO "b •..... t. art c.lmiDinl variation in peR. amrJified•• qu•• ctl of milo<IIondrill D~A from i.l.nd populalions .nd (Omrarin,.hUD with ml inland (onuol IImplts.
In ,ddilion '0 ihese ua Ind Eenttic e((uts ...-e are abo tumin;ng theeffecls of comp.lilion from inlloduced IIts on Ih. population ,·i.biliIY (Ifthe Dativt. "ruin. Our "Iudiu of Iht. c."linclit'n proctSs in "man mammalsIre Ide'·.nt 10 the m.n'J;cmcnl of Thailand's Jar,cr cndan,cud ",.c.ciu.nd hi,hly f.. ,mcnlcd I>iodh'cnily ,(n.lll1y.
The speries·aroa cu,,'es ror small mammals on islands in the Chiew Larnreser"oir and mainland plOI$ of equi\'llenl area in conlinuous forul are •.si&nifiunlly differei" indicatin& Ihll isllnds arc dcpluperale in numbcrsor spedes compared 10 mlinland arc.u (J;i,ure I). Rc,reuion Ina lysis orfaelm affeclin, tht presence or Ibsenee of specits showed thai bothclwaCluiSlics of the silt (island or mainland. area. and amounl of foruldislurballce) and of species (body slae) innuence the probability or specieseeeuneeee, Tbis ,enerll model docs not, however, adoqualely prediel theprobabilily or presente for individual species. Rlther ea.h spod .. needs 10
be considered .eparately since individual species have diU."nt reponsesto the crfetu of fra,mtn~tion.
Fitur. I. Small mammal speeles numbers on islands and mainlandsites at Cbitw tarn, Sural Tbani rro"inee, Tbailand,
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•
IJ.I~----------~t~-----------I~O------------I~OO~--------~I~
/.Tea (ha)MAINlAND· y. 0..4~ • 0.20K, R squared· 0.551 1><0.001ISlAND • y. 0.23 • 0.30., R5quarl'd. 0.6S9 1><0.001
RererencesI. Robinson, G.R., Holt, R.D., Gaines, M.S., H~bur" S.P., Johnson. M.L., FitCh, H.S.
and E.A. MlI1inko 1992 DI\'e,'$O and eonlranin& effecu or hlbiLitfr.,menLition. Scient< 2:>7; :>24.:>26•
. 2. Diamond, J.M. 198~ 'Nonna! extinctions or isolated populauons:CIt. 6 In: Nitecki, M.H. (ed) Exunctions. (lJnivenil)' or Cbiul0 Press, Cbi(110)pp. 191·2.6.
3. Trlcy, C.R. and T.L. Goort.. 1992 On the detuminanu or eAtincuon.Am. NaL 139 (I); 102·122.
