4
NATURE | VOL 409 | 25 JANUARY 2001 | www.nature.com 507 letters to nature ................................................................. Archaeal dominance in the mesopelagic zone of the Paci®c Ocean Markus B. Karner*, Edward F. DeLong² & David M. Karl* * University of Hawai'i, Department of Oceanography, 1000 Pope Road, Honolulu, Hawai'i 96822, USA ² Monterey Bay Aquarium Research Institute, 7700 Sandholdt Road, Moss Landing, California 95039, USA .............................................................................................................................................. The ocean's interior is Earth's largest biome. Recently, cultivation- independent ribosomal RNA gene surveys have indicated a poten- tial importance for archaea 1 in the subsurface ocean 2±4 . But quantitative data on the abundance of speci®c microbial groups in the deep sea are lacking 5,6 . Here we report a year-long study of the abundance of two speci®c archaeal groups (pelagic euryarch- aeota and pelagic crenarchaeota) 2 in one of the ocean's largest habitats. Monthly sampling was conducted throughout the water column (surface to 4,750 m) at the Hawai'i Ocean Time-series station 7 . Below the euphotic zone (. 150 m), pelagic crenarch- aeota comprised a large fraction of total marine picoplankton, equivalent in cell numbers to bacteria at depths greater than 1,000 m. The fraction of crenarchaeota increased with depth, reaching 39% of total DNA-containing picoplankton detected. The average sum of archaea plus bacteria detected by rRNA- targeted ¯uorescent probes ranged from 63 to 90% of total cell numbers at all depths throughout our survey. The high propor- tion of cells containing signi®cant amounts of rRNA suggests that most pelagic deep-sea microorganisms are metabolically active. Furthermore, our results suggest that the global oceans harbour approximately 1.3 ´ 10 28 archaeal cells, and 3.1 ´ 10 28 bacterial cells. Our data suggest that pelagic crenarchaeota represent one of the ocean's single most abundant cell types. Sampling was carried out at roughly monthly intervals from September 1997 to December 1998 at the Hawai'i Ocean Time- series station ALOHA 7 (228 459 N, 1588 009 W) in the North Paci®c subtropical gyre. We quanti®ed cells belonging in the domain Bacteria, and two speci®c phylogenetic groups in the domain Archaea, which are prevalent in marine plankton: `group 1 archaea' (referred to here as pelagic crenarchaeota); and `group 2 archaea' 20 30 40 50 60 70 80 Depth (m) % of DAPI count 5,000 1,000 100 10 5 5 10 15 20 25 30 35 40 Depth (m) S O N D J F M A M J J A S O N D 1998 % of DAPI count 5,000 1,000 100 10 5 Bacteria Crenarchaeota Figure 1 Contour plots of relative abundances with depth of bacteria and pelagic crenarchaeota during a 1-yr sampling effort at the Hawai'i Ocean Time-series station, ALOHA, in the North Paci®c subtropical gyre. White dots indicate dates and depths where samples were collected. Contour lines are percentages of bacteria and pelagic crenarchaeota as compared with total microbial abundance at each depth. Total cell abundance was assessed using the DAPI nucleic acid stain. Bacteria and archaea were enumerated using whole-cell rRNA targeted ¯uorescent in situ hybridization with ¯uorescein-labelled polynucleotide probes. See also Supplementary Information. © 2001 Macmillan Magazines Ltd

J409 25d 507....44444444444444444444444444444444444444444444444444444444444444444!!!!! +*2 F@>>. –1 0

  • Upload
    others

  • View
    4

  • Download
    0

Embed Size (px)

Citation preview

Page 1: J409 25d 507....44444444444444444444444444444444444444444444444444444444444444444!!!!! +*2 F@>>. –1 0

!"#$%& ' ()* +,- ' ./ 0"!$"%1 .,,2 ' 333456789:4;<= !"#

$%&&%'( &) *+&,'%

44444444444444444444444444444444444444444444444444444444444444444!"#$%&%' ()*+,%,#& +, -$&*&.)/&'%0+#1),&)2-$&3%#+4#5#&%,6%"78. 9: ;%",&">< =(>%"( ?: @&A),0? B @%C+( 6: ;%"'>

>!"#$%&'#() *+ ,-.-#/#0 1%2-&(3%"( *+ 45%-"*6&-27)0 8999 :*2% ;*-<0,*"*=>=>0 ,-.-#/# ?@ABB0 !CD?E*"(%&%) F-) DG>-&#>3 ;%'%-&57 H"'(#(>(%0 II99 C-"<7*=<( ;*-<0E*'' J-"<#"60 K-=#+*&"#- ?L9M?0 !CD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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

@:A7:=K:9 2--L 7< M:;:=K:9 2--N 67 7G: O636CPC );:65 #C=:QE:9C:E E767C<5 "*)O"L R..! +/" !S 2/N! ,,"TU C5 7G: !<97G V6;CW;E8K79<AC;6B DH9:4 T: X8657CW:F ;:BBE K:B<5DC5D C5 7G: F<=6C5Y6;7:9C6S 65F 73< EA:;CW; AGHB<D:5:7C; D9<8AE C5 7G: F<=6C5"9;G6:6S 3GC;G 69: A9:I6B:57 C5 =69C5: AB65Z7<5[ \D9<8A 2 69;G6:6PR9:J:99:F 7< G:9: 6E A:B6DC; ;9:569;G6:<76U] 65F \D9<8A . 69;G6:6P

20

30

40

50

60

70

80

Dep

th (m

)

% o

f D

AP

I co

unt

5,000

1,000

100

10

5

5

10

15

20

25

30

35

40

Dep

th (m

)

S O N D J F M A M J J A S O N D

1998

% o

f D

AP

I co

unt

5,000

1,000

100

10

5

Bacteria

Crenarchaeota

!"#$%& ' !"#$"%& '("$) "* &+(,$-.+ ,/%#0,#1+) 2-$3 0+'$3 "* /,1$+&-, ,#0 '+(,4-1

1&+#,&13,+"$, 0%&-#4 , 567& ),8'(-#4 +**"&$ ,$ $3+ 9,2,-:- ;1+,# <-8+6)+&-+) )$,$-"#=

>?;9>= -# $3+ @"&$3 A,1-B1 )%/$&"'-1,( 47&+C D3-$+ 0"$) -#0-1,$+ 0,$+) ,#0 0+'$3) 23+&+

),8'(+) 2+&+ 1"((+1$+0C !"#$"%& (-#+) ,&+ '+&1+#$,4+) "* /,1$+&-, ,#0 '+(,4-1

1&+#,&13,+"$, ,) 1"8',&+0 2-$3 $"$,( 8-1&"/-,( ,/%#0,#1+ ,$ +,13 0+'$3C <"$,( 1+((

,/%#0,#1+ 2,) ,))+))+0 %)-#4 $3+ E>AF #%1(+-1 ,1-0 )$,-#C G,1$+&-, ,#0 ,&13,+, 2+&+

+#%8+&,$+0 %)-#4 23"(+61+(( &H@> $,&4+$+0 I%"&+)1+#$ !" #!$% 37/&-0-J,$-"# 2-$3

I%"&+)1+-#6(,/+((+0 '"(7#%1(+"$-0+ '&"/+)C K++ ,()" K%''(+8+#$,&7 F#*"&8,$-"#C

© 2001 Macmillan Magazines Ltd

Page 2: J409 25d 507....44444444444444444444444444444444444444444444444444444444444444444!!!!! +*2 F@>>. –1 0

R9:J:99:F 7< G:9: 6E A:B6DC; :89H69;G6:<76U.4 %CK<E<=6B %!"Q769D:7:F A<BH58;B:<7CF: A9<K:E^ EA:;CW; J<9 :C7G:9 A:B6DC; ;9:569;GQ6:<76S :89H69;G6:<76 <9 K6;7:9C6 3:9: GHK9CFC_:F 3C7G 6BB E6=AB:E;<BB:;7:F J9<= @:A7:=K:9 2--L 857CB M:;:=K:9 2--N R<5: F::AE6=AB: ;<BB:;7:F C5 );7<K:9 2--N G6F E79<5D EA89C<8E K6;ZD9<85F`8<9:E;:5;: 65F 36E <=C77:F J9<= 7G: F676 E:7U4 V9<K:QKC5FC5D;:BBE 3:9: :58=:967:F 9:B67CI: 7< 7<76B ;:BBE E76C5:F KH +"S^QFCQ6=CFC5<Q.QAG:5HBC5F<B: RM"VaUN F<8KB: E76C5C5D-4 V9<K:Q;<5QJ:99:F `8<9:E;:5;: 36E =<E7 C57:5E: C5 E6=AB:E J9<= EG6BB<3:9F:A7GE R,b/,, =US 65F 36E 3:6Z:9 J<9 K<7G 69;G6:6 65F K6;7:9C6 67F:A7GE D9:67:9 7G65 /,, =4 !:D67CI: ;<579<B ;<857E RGHK9CFC_67C<53C7G 6 5<5EA:;CW; A9<K: 65F 687<`8<9:E;:5;:U 3:9: K:B<3 /c <J7<76B ;:BBE C5 -^c <J 6BB E6=AB:ES G:5;: 6 GCDG F:D9:: <J ;<5WF:5;: C57GCE =:7G<F 36E 6;GC:I:F4 R@:: 6BE< @8AAB:=:5769H a5J<9=67C<54U#G: 73< 69;G6:6B D9<8AE E89I:H:FS 6E 3:BB 6E K6;7:9C6 ;<BB:;7CI:BHS

B6;Z:F ;B:69 E:6E<56B 79:5FE C5 9:B67CI: ;:BB8B69 6K85F65;: RdCD4 2U4#G:9:J<9:S 6I:96D:E 3:9: ;6B;8B67:F J<9 6BB E6=AB:E J<9 :6;G F:A7GB6H:9S HC:BFC5D 7G: =:65 65586B F:A7G A9<WB: J<9 :6;G AGHB<7HA:RdCD4 .6U4 e:BBE GHK9CFC_C5D 3C7G 7G: K6;7:9C6B A9<K: F<=C567:F 7G:A<A8B67C<5 C5 7G: 8AA:9 2/,= <J 7G: 367:9 ;<B8=5S 9:A9:E:57C5D 8A7< -,c <J 6BB ;:BBE4 Y6;7:9C6 F:;9:6E:F C5 9:B67CI: 6K85F65;: 3C7GC5;9:6EC5D F:A7G RdCDE 2S .6US 65F K:B<3 2S,,,= 7G:H 9:A9:E:57:F<5BH f/b+,c <J 7<76B ;:BBE4 YH ;<=A69CE<5S A:B6DC; ;9:569;G6:<76C5;9:6E:F EG69ABH C5 9:B67CI: 6K85F65;: 67 7G: ./,Q= F:A7G B6H:9S65F K:B<3 2S,,,=3:9: 6E ;<==<5 6E K6;7:9C6 RdCDE 2S .6U4 @6=AB:EJ9<= 2/,= RC5;B8F:F C5 + <J 7G: 2+ E6=ABC5D F67:EU C5FC;67:F 7G677G: 9:B67CI: C5;9:6E: C5 A:B6DC; ;9:569;G6:<76 <;;899:F K:73::5 2,,65F 2/, =S 5:69 7G: F:A7G <J 7G: 2c CE<B8=: RdCDE 2S .6U4 a5 E89J6;:

B6H:9ES A:B6DC; ;9:569;G6:<76 3:9: <5BH A9:E:57 EA<96FC;6BBHS 65F5:I:9 6K85F657 58=:9C;6BBH4 V:B6DC; :89H69;G6:<76 <;;6EC<56BBH6AA:69:F C5 7G: 5:69 E89J6;: B6H:9S K87 D:5:96BBH 9:=6C5:F 67 6 J:3A:9 ;:57 <J 7G: 7<76B ;<857 <I:9 7G: :57C9: 367:9 ;<B8=5S 7<< ;B<E: 7<5:D67CI: ;<857E 7< :E76KBCEG 6 E767CE7C;6BBH 9:BC6KB: :E7C=67: RdCD4 .6U4V:B6DC; ;9:569;G6:<76 65F :89H69;G6:<76 7G8E EG<3:F FCJJ:9:57A677:95E <J 6K85F65;: C5 7G: <A:5 E:6 RdCD4 .6US 3C7G B<3 58=K:9E<J :89H69;G6:<76 C5 E89J6;: 367:9ES C5 ;<5796E7 7< A9:IC<8E <KE:9I6Q7C<5E C5 ;<6E76B 367:9E^S2,S224#G: E8= <J 9:B67CI: 6K85F65;:E <J K6;7:9C6S A:B6DC; :89H69;G6:<76

65F A:B6DC; ;9:569;G6:<76 RE8K796;7C5D 5:D67CI: ;<579<BEU EG<3E 7G:7<76B J96;7C<5 <J A9<K:QKC5FC5D ;:BBE <I:9 ;:BBE E76C5:F KH M"VaRdCD4 .KU4 "B7G<8DG <89 F::AQE:6 F676 <5 9:B67CI: 6K85F65;: <JA:B6DC; ;9:569;G6:<76 RdCD4 .6U 69: DB<K6BBH GCDG:9 7G65 7G<E:9:;:57BH 9:A<97:F C5 ;<6E76B 367:9E^S <89 ;8=8B67CI: 9:B67CI: 6K85QF65;: F676 <5 7<76B A9<K:QA<EC7CI: ;:BBE RdCD4 .KU 69: B<3:94 #GCE =6HK: F8: 7< 7G: <BCD<79<AGC; 56789: <J 7G: E78FH EC7:4 #<76B ;:BB6K85F65;: A677:95E 9:`:;7:F 7G: GCDG:9 7<76B ;:BB 58=K:9E C5E89J6;: 367:9E RdCD4 fU4 #<76B ;:BB 6K85F65;: F:;BC5:F KH 65 <9F:9<J =6D5C78F: K:73::5 2/, 65F 2S,,, =4 #G8ES 7G: 7<76B 58=K:9 <JA:B6DC; ;9:569;G6:<76B ;:BBE A:6Z:F K:73::5 2/, 65F /,, =S K879:=6C5:F 67 GCDG 9:B67CI: 58=K:9E K:B<3 7GCE F:A7G 7< 7G: <;:65`<<94a5 9:;:57 H:69E ;8B7CI67C<5QC5F:A:5F:57 9%!" D:5: E89I:HE G6I:

9:I:6B:F 5:3 7HA:E <J 69;G6:6 C5 IC9786BBH :I:9H :;<EHE7:=:g6=C5:F2.S2f4 1:7 =69C5: AB65Z7<5C; 69;G6:6B 7HA:E G6I: :B8F:F;8B7CI67C<5 7< F67:S 65F J:3 X8657C767CI: F676 :gCE7 <5 7G:C9 ;:BB8B69FCE79CK87C<5 65F 6K85F65;:4 h<E7 A9:IC<8E E78FC:E G6I: 9:BC:F <57G: 9:79C:I6B <J 9%!"QD:5:Q;<576C5C5D ;B<5:E 7< X86BC767CI:BHF:E;9CK: 567896BBH <;;899C5D AC;<AB65Z7<5 A<A8B67C<5E.b+4 "58=K:9 <J E78FC:E 8EC5D X8657C767CI: 9%!" GHK9CFC_67C<57:;G5CX8:E.S2,S22S2+S2/ G6I: E8DD:E7:F 6 3CF:EA9:6F <;;899:5;: 65FGCDG 9:B67CI: ;:BB 6K85F65;: <J 69;G6:6 C5 7G: 8AA:9 367:9 ;<B8=54$5J<978567:BHS 7G:E: :69BC:9 E78FC:E F< 5<7 6BB<3 J<9 X8657CW;67C<5<J 6;786B ;:BB 58=K:9E4 i8657C767CI: =C;9<E;<AC; E89I:HE 8EC5DEC5DB:Q;:BBS `8<9:E;:57 #" '#(> GHK9CFC_67C<5 3C7G 9%!"Q769D:7:F<BCD<58;B:<7CF: A9<K:ES KH ;<5796E7S 6BB<3 FC9:;7 ;:BB :58Q=:967C<52^S2L4 " J:3 C5I:E7CD67C<5E 8EC5D <BCD<58;B:<7CF: A9<K:E 7<:58=:967: =69C5: AC;<AB65Z7<5/S2Nb., G6I: E8;;::F:F C5 F:7:;7C5D

$%&&%'( &) *+&,'%

!"- !"#$%& ' ()* +,- ' ./ 0"!$"%1 .,,2 ' 333456789:4;<=

60 80 100

14

1414

14

4

4

9

9

14

14

9

All probes

0 20 40 60 80

10

100

1,000

5,000

Microbial domains

Crenarchaeota Euryarchaeota Bacteria

Negative controlSum of probes

Percentage of DAPI count

Depth (m)

a b

!"#$%& (L+,# ,##%,( 0+'$3 '&"B(+) "* 8-1&"/-,( 0"8,-#) -# $3+ @"&$3 A,1-B1 )%/$&"'-1,(47&+C @%8/+&) ,&+ '+&1+#$,4+) "* /,1$+&-, ,#0 ,&13,+, ,) 1"8',&+0 $" $"$,( 8-1&"/-,(

,/%#0,#1+ ,$ +,13 0+'$3C <"$,( 1+(( ,/%#0,#1+ 2,) ,))+))+0 %)-#4 $3+ E>AF #%1(+-1 ,1-0

)$,-#C G,1$+&-, ,#0 ,&13,+, 2+&+ +#%8+&,$+0 %)-#4 23"(+61+(( &H@> $,&4+$+0 I%"&+)1+#$

!" #!$% 37/&-0-J,$-"# 2-$3 I%"&+)1+-#6(,/+((+0 '"(7#%1(+"$-0+ '&"/+)C E,$, ,&+ ,.+&,4+) "*

%' $" 5M &"%43(7 8"#$3(7 ),8'(-#4) ".+& , 567& '+&-"0 ,$ $3+ 9,2,-:- ;1+,# <-8+6)+&-+)

)$,$-"#= >?;9>C N&&"& /,&) )3"2 )$,#0,&0 +&&"& "* 8+,#O #"$+ 1"(%8# *"& $"$,( ),8'(+ )-J+

,$ +,13 0+'$3C K++ ,()" K%''(+8+#$,&7 F#*"&8,$-"#C )= E+'$3 '&"B(+) *"& /,1$+&-, P)"(-0)Q%,&+)R= '+(,4-1 1&+#,&13,+"$, P"'+# )Q%,&+)R= '+(,4-1 +%&7,&13,+"$, P"'+# 1-&1(+)R=

,#0 , #"#6)'+1-B1 1"#$&"( '&"/+ PS#+4,$-.+:= )"(-0 1-&1(+)RC *= E+'$3 '&"B(+ "* $3+ )%8 "*

&+(,$-.+ ,/%#0,#1+) "* /,1$+&-,= '+(,4-1 1&+#,&13,+"$, ,#0 '+(,4-1 +%&7,&13,+"$, P"'+#

0-,8"#0)RC H+(,$-.+ ,/%#0,#1+) "* /,1$+&-, ,#0 /"$3 ,&13,+,( 4&"%') 2+&+ )%88,$+0 ,$

+,13 0+'$3 ,#0 #+4,$-.+ 1"#$&"( 0,$, 2+&+ )%/$&,1$+0C

103 104 105 106

10

100

1,000

Sum of probes5,000

Total microbial cells per ml

Depth (m)

ArchaeaBacteria

!"#$%& +L+,# ,##%,( 0+'$3 '&"B(+) "* 8-1&"/-,( 0"8,-#) -# $3+ @"&$3 A,1-B1 )%/$&"'-1,(47&+C @%8/+&) ,&+ $"$,( 1+(( ,/%#0,#1+) "* /,1$+&-, ,#0 ,&13,+, P'+(,4-1 1&+#,&13,+"$,

,#0 +%&7,&13,+"$, 1"8/-#+0RC G,1$+&-, ,#0 ,&13,+, 2+&+ +#%8+&,$+0 %)-#4 23"(+61+((

&H@> $,&4+$+0 I%"&+)1+#$ !" #!$% 37/&-0-J,$-"# 2-$3 I%"&+)1+-#6(,/+((+0 '"(7#%1(+"$-0+

'&"/+)C E,$, ,&+ ,.+&,4+) "* %' $" 5M &"%43(7 8"#$3(7 ),8'(-#4) ".+& , 567& '+&-"0 ,$ $3+

9,2,-:- ;1+,# <-8+6)+&-+) )$,$-"#= >?;9>C K++ ,()" K%''(+8+#$,&7 F#*"&8,$-"#C

© 2001 Macmillan Magazines Ltd

Page 3: J409 25d 507....44444444444444444444444444444444444444444444444444444444444444444!!!!! +*2 F@>>. –1 0

567896BBH <;;899C5D K6;7:9C6B 65F 69;G6:6B ;:BBE4 )5: E78FH/ 8EC5DC=6D: C57:5ECW;67C<5 7< :5G65;: 7G: `8<9:E;:5;: ECD56B 9:A<97:FGCDG A:9;:576D:E <J "9;G6:6 R8A 7< ^,cU C5 ;<6E76B 7:=A:967:367:9E 65F 7G: h:FC7:9965:65 @:64 @:I:96B E78FC:ES 8EC5D 65 <BCD<Q58;B:<7CF: A9<K: 769D:7C5D 7G: F<=6C5 "9;G6:6S F:7:;7:F J:3 <9 5<69;G6:6B ;:BBE C5 7G: 8AA:9 367:9 ;<B8=52-S.,4!<5: <J 7G:E: :69BC:9 E78FC:ES G<3:I:9S :g6=C5:F F:A7GE K:B<3

^,, =S 65F <5BH <5:2N CF:57CW:F EA:;CW; 69;G6:6B ;:BB 7HA:E K:H<5F7G: F<=6C5 B:I:B4 d897G:9S EC5DB:Q;:BB GHK9CFC_67C<5 E78FC:E G6I:K::5 G6=A:9:F KH 7G: E=6BB EC_: 65F 6AA69:57 B<3 9%!" ;<57:57 <J=69C5: AC;<AB65Z7<5/S^S2N4 h8B7CABH B6K:BB:FS 9%!"Q769D:7:F A<BHQ58;B:<7CF: A9<K:E^ 6BB<3 =<9: EHE7:=67C; :58=:967C<5 <J EA:;CW;D9<8AE <J AB65Z7<5C; =C;9<K:E4 Y87 7GCE 6AA9<6;G G6E E< J69 K::5F:=<5E7967:F <5BH 67 6 ;<6E76B <;:65 EC7:^S A9<=A7C5D <89 E78FH 677G: O636CC );:65 #C=:QE:9C:E E767C<54a5 7GCE 9:A<97S 3: ;<5;B8ECI:BH EG<3 7G67 A:B6DC; ;9:569;G6:<76

3:9: :X8CI6B:57 C5 58=K:9E 7< K6;7:9C6 7G9<8DG<87 7G: :57C9: =:E<Q65F K67GHA:B6DC; _<5:E C5 6=6j<9 <;:65 DH9:S <I:9 6 2QH9 7C=:QE:9C:EE89I:H4 #3< =6C5 A<C57E 69CE: J9<= <89 <KE:9I67C<5E4 dC9E7S <56I:96D:S 7G: J96;7C<5 <J A:B6DC; ;9:569;G6:<76 9:B67CI: 7< M!"Q;<576C5C5D =C;9<<9D65CE=E :X86BE <9 :g;::FE 7G: K6;7:9C6B J96;7C<5K:B<3 2S,,,= RdCD4 .6U4 #GCE 9:E8B7 E8DD:E7E 7G67 A:B6DC; ;9:569;GQ6:<76 69: 6 ;<5ECE7:57 65F ECD5CW;657 ;<=A<5:57 <J F::A E:6=C;9<KC<76S 65F 7G67 7G:H =6H 9CI6B K6;7:9C6B 6K85F65;:E C5 7G:=:E<Q 65F K67GHA:B6DC; _<5:E4 d897G:9S 7G: E765FC5D E7<;ZE <JK6;7:9C6 65F A:B6DC; ;9:5<9;G6:<76 3:9: C5I:9E:BH A9<A<97C<56B4@:;<5FS 7G: 7<76B A9<A<97C<5 <J ;:BBE RK6;7:9C6B 65F 69;G6:6BUF:7:;7:F 3C7G A<BH58;B:<7CF: A9<K:E RdCD4 .KU 9:=6C5:F J6C9BH;<5E7657 C5 E89J6;: 367:9E 7< F:A7GE <J 2S,,, =S 9<8DGBH N,c <J7G: 7<76B M!"Q;<576C5C5D ;:BBEN4 "7 F:A7GE K:73::5 .S,,, 65F fS,,,=S 7GCE 58=K:9 F:;9:6E:F 7< 6K<87 ^,c K:J<9: C5;9:6EC5D 6D6C5 7<=<9: 7G65 L,c ;B<E: 7< 7G: E:6 `<<9 RdCD4 .KUS EC=CB69 7< A9:IC<8EBH9:A<97:F =C;9<KC6B ;:BB 58=K:9E 65F =:76K<BC; 6;7CIC7H A9<WB:E C57G: F::A V6;CW;.24 M!"Q;<576C5C5D ;:BBE 85B6K:BB:F KH A<BH58;B:<Q7CF: A9<K:E =CDG7 C5;B8F: ;:BBE 3C7G B<3 9%!" ;<57:57S ;:BBE 5<79:;<D5C_:F KH 7G: A9<K:E RJ<9 :g6=AB:S 858E86BBH E=6BB N>5-&)- C57G: 2Q"= 965D:..U <9 F:6F ;:BBE RDG<E7EU.f4 )89 9:E8B7E AB6;: 658AA:9 BC=C7 <5 7G: E8=<J 7G: 6K<I: ;67:D<9C:E4T: ;<5;B8F: 7G67 7G:8E: <J A<BH58;B:<7CF: A9<K:E A9<ICF:E 6 9<K8E7 6AA9<6;G J<9CF:57CW;67C<5 <J F::AQE:6 =C;9<K:ES 65F 7G67 7G: J96;7C<5 <J 9:=6C5QC5D 85B6K:BB:F ;:BBE 9:=6C5E K:B<3 .,bf,c <J 7G: 7<76B ;:BBE4" A9:IC<8E E78FH.+ E8DD:E7:F 7G67 7G: 58=K:9 <J ;:BBE A<EC7CI: J<9

9%!" GHK9CFC_67C<5 7:;G5CX8:E =6H 9:`:;7 7G: 58=K:9 <J =:76K<QBC;6BBH 6;7CI: ;:BBE4 aJ 798:S 7G:5 7G: 7<76B 58=K:9 <J A9<K:QKC5FC5D;:BBE EG<8BF 9:A9:E:57 7G: A9<A<97C<5 <J =:76K<BC_C5D ;:BBE C5 7G:367:9 ;<B8=5 R^,bN,c <J 7<76B ;:BBE A9:E:57U4 #G: F:;9:6E: C5A9<K:QA<EC7CI: ;:BBE K:73::5 .S,,, 65F fS,,,= =CDG7 9:`:;7F:;9:6EC5D 6I6CB6KCBC7H <9 X86BC7H <J D9<37G E8KE7967:S 9:E8B7C5D C56 =:76K<BC;6BBH B:EE 6;7CI: A<A8B67C<54 eB<E: 7< 7G: E:6 `<<9SD96IC767C<56BBH F:A<EC7:F <9D65C; =677:9 =CDG7 79CDD:9 7G: <KE:9I:FC5;9:6E: <J 7G: A9<A<97C<5 <J 6BB A9<K:QA<EC7CI: ;:BBE RdCD4 .KU4 #GCE9:E8B7 CE ;<5ECE7:57 3C7G <KE:9I:F C5;9:6E:E C5 =:76K<BC; 6;7CIC7H5:69 7G: E:6 `<<9 A9:IC<8EBH J<85F C5 V6;CW; K67GHA:B6DC; =C;9<KC6BA<A8B67C<5E.24 )89 F676 C5FC;67: 7G67 =<E7 F::AQE:6 =C;9<K:ER69;G6:6 65F K6;7:9C6U ;<576C5 6AA9:;C6KB: 6=<857E <J 9%!"S 65FE< =6H K: 6;7CI: ;<579CK87<9E 7< 7G: :;<EHE7:=4 d897G:9=<9:S DCI:57G67 7G: 7<76B 58=K:9 <J =C;9<K:E E79<5DBH F:;9:6E:E 3C7G F:A7G C57G: <;:65.2S./S <89 F676 B:6F 7< 65 :;<B<DC;6BBH ECD5CW;657 ;<5;B8EC<5[D9<37G ;<5FC7C<5E J<9 A:B6DC; =C;9<K:E F< 6AA:69 7< K: 6;;8967:BH9:`:;7:F KH =C;9<KC6B E765FC5D E7<;Z4 #G:9: =6H 6BE< K: 6 A<A8B6Q7C<5 EGCJ7 3C7G C5;9:6EC5D F:A7G 7< =C;9<KC6B D9<8AE K:77:9 6F6A7:F7< F::A E:6 ;<5FC7C<5ES 6 B69D: J96;7C<5 <J 3GC;G 6AA:69E 7< K:A:B6DC; ;9:569;G6:<764e<=KC5C5D <89 A9:E:57 F676 E:7 3C7G ;<57C5:576B EG:BJ F676^S 3:

;65 :g796A<B67: 7<76B ;:BB 6K85F65;:E J<9 69;G6:6 7< 7G: DB<K6B<;:65.^4 @8;G 65 :g796A<B67C<5 E8DD:E7E 7G67 7G: 3<9BF <;:65;<576C5E 6AA9<gC=67:BH 24f ! 2,.N 69;G6:6B ;:BBES 65F f42 ! 2,.N

K6;7:9C6B ;:BBE4 "K<87 24, ! 2,.N ;:BBES 7G67 CES .,c <J 6BB 7G: AC;<QAB65Z7<5 ;:BBE C5 7G: 3<9BF <;:65 6AA:69 7< K: 9:A9:E:57:F KH <5:EA:;CW; ;B6F:S 7G: A:B6DC; ;9:569;G6:<764 #G: G6KC767 965D: J<9 7GCEEC5DB: =C;9<KC6B D9<8AS EA655C5D J9<==:E<A:B6DC; 7< K67GHA:B6DC;F:A7GES CE 858E86BBH K9<6F4 "E 6 F<=C5657 ;<=A<5:57 <J 7G: F::A<;:65S &697GPE B69D:E7 KC<=:S 69;G6:6 69: 7G8E J69 J9<= ;<5W5:F 7<:g79:=: 5C;G: G6KC767E4 %67G:9S 7G: FCE79CK87C<5 <J 7G:E: 69;G6:6E8DD:E7E 7G67 6 ;<==<5 6F6A7CI: E7967:DH G6E 6BB<3:F 7G:= 7<96FC67: 7G9<8DG<87 5:69BH 7G: :57C9: <;:65C; 367:9 ;<B8=54 !

,&-./012)345& 4%&4)%)-"/6

@6=AB:E 3:9: Wg:F 3C7G ,4.Q"= WB7:9:F J<9=6BC5 R.c W56B ;<5;:57967C<5U 65F WB7:9:F<57< ,4.Q"= A<BH;69K<567: WB7:9E4 "J7:9 WB7967C<5 ;:BBE 3:9: 79:67:F KH <I:9B6HC5D 7G:WB7:9 J<9 .=C5 3C7G 6 ,4./ h !6eB E<B87C<5 =6F: 8A C5 /,c RIkIU :7G65<B4 @6=AB:E3:9: E7<9:F J9<_:5 :C7G:9 K:J<9: <9 6J7:9 WB7967C<5S 3C7G :X86B A9:E:9I67C<5 <J A9<KC5DA<7:57C6B4

7./5&89&55 :$/%&19&6- !" #!$% .;*%"0"<)-"/6 9/$6-1

%CK<E<=6B %!" 769D:7:F GHK9CFC_67C<5 36E ;699C:F <87 <5 7G: WB7:9QK<85F ;:BBE 8EC5D`8<9:E;:C5 CE<7GC<;H6567: Rda#eU =8B7CABH B6K:BB:F A9<K:E^ <J =<9: 7G65 2,, K6E: A6C9E C5B:5D7GS 769D:7C5D ;9:569;G6:<76 R=69C5: D9<8A 2 69;G6:6U <9 :89H69;G6:<76 R=69C5: D9<8A. 69;G6:6U2,S <9 K6;7:9C64 " 5<5QKC5FC5D A9<K: R;<5ECE7C5D <J 7G: ;<=AB:=:5769H E7965F <J7G: A:B6DC; ;9:569;G6:<76B A9<K:U E:9I:F 6E 7G: 5:D67CI: ;<579<BS 3GCB: 7G: E8==67C<5 <J69;G6:6B 65F K6;7:9C6B J96;7C<5E R=C58E 5:D67CI: ;<579<BU A9<ICF:F 6 ;G:;Z <5 G<3 7<76BA9<K:QA<EC7CI: ;:BBE ;<=A69:F 3C7G 7<76B ;:BB ;<857E 8EC5D 7G: M"Va E76C5N4 V9<K: 36E6FF:F 7< 6 GHK9CFC_67C<5 K8JJ:9 67 6 W56B ;<5;:57967C<5 <J . 5D"B"24 #G: GHK9CFC_67C<5K8JJ:9 <J 2,c R3kIU F:g7965 E8BAG67:S ,4,2c A<BHR"U 65F ,42c E<FC8= F<F:;HB E8BAG67:R@M@U C5 /! @&#36E 8E:F 3C7G :C7G:9 /,c J<9=6=CF: RK6;7:9C6B 65F 5:D67CI: ;<579<BA9<K:EU <9 L,c J<9=6=CF: RJ<9 K<7G 69;G6:6B A9<K:ES 2! @&# CE 2/,=h !6eBS 2=h:7GHB:5:FC6=C5:7:7966;:7C; 6;CF R&M#"US .,=h #9CES AO N4,U4T: FCF 5<7 687<=67C;6BBH E8K796;7 7G: 5:D67CI: ;<857 ;<99:EA<5FC5D 7< :6;G E6=AB:

K:;68E: ;:BBE EG<3C5D 6 \5:D67CI:P C=6D:S J<9 :g6=AB:S <3C5D 7< 687<`8<9:E;:5;:S ;<8BF K:<J 65H D9<8A[ ;9:569;G6:<76S :89H69;G6:<76 <9 K6;7:9C64 TG:5 9:A<97C5D 7G: E8= <J9:B67CI: ;:BB 58=K:9E J9<= 6BB A9<K:ES G<3:I:9S 3: FCF E8K796;7 7G: 5:D67CI: ;<857 6E G:9:3: ;65 9:B67: 7G: 5:D67CI: ;<857 7< 6BB ;:BBES HC:BFC5D 6 ;<5E:9I67CI: :E7C=67: J<9 7<76B A9<K:A<EC7CI: ;:BBE4 M89C5D "A9CB 2--NS GCDG 5:D67CI: I6B8:E <J ./c 65F f^c 3:9: <KE:9I:F J<97G: /Q= 65F 7G: ./Q= B6H:9ES 9:EA:;7CI:BH] J<9 7G: <7G:9 2., E6=AB:E 7G: 5:D67CI: ;<579<B6I:96D:F .4,# 24/c R=:65# E4F4U4 OHK9CFC_67C<5 7:=A:96789:E 3:9: ^/ !e J<9 7G: 73<69;G6:6B A9<K:ES 65F // !e J<9 K6;7:9C6B 65F 5:D67CI: ;<579<B A9<K:E4 OHK9CFC_67C<5 7C=:36E 2. G4 V<E7QGHK9CFC_67C<5 36EG R. GU 36E 67 /, !e J<9 69;G6:6B A9<K:ES 65F +/ !e J<9K6;7:9C6Bk5:D67CI: ;<579<B A9<K:E C5 6 ,4.! @&# E<B87C<5 =6F: 8A C5 /,c J<9=6=CF:4dCB7:9E 3:9: =<857:F C5 eC7C`8<9 R#:F V:BB6US 65F da#eQA<EC7CI: ;:BBE 3:9: ;<857:F C59:B67C<5 7< M"VaQA<EC7CI: ;:BBE <5 7G: E6=: WB7:9-4 e<857C5D 36E A:9J<9=:F 8EC5D 6 l:CEE:AC`8<9:E;:5;: =C;9<E;<A: :X8CAA:F 3C7G 6 !2,, !:<`869 <Kj:;7CI: 65F 2,,QT=:9;89HB6=A CBB8=C567C<5S 6E 3:BB 6E 7G: 6AA9<A9C67: WB7:9 E:7E J<9 M"Va 65F da#e ReG9<=6#:;G5<B<DHU4

%:;:CI:F + 08BH] 6;;:A7:F .2 !<I:=K:9 .,,,4

24 T<:E:S e4 %4S m65FB:9S )4 n TG::BCES h4 *4 #<369FE 6 567896B EHE7:= <J <9D65CE=E[ V9<A<E6B J<9 7G:

F<=6C5E "9;G6:6S Y6;7:9C6S 65F &8;69H64 :&*5O P-(= D5-<O C5#O !CD XM5 +/L^b+/L- R2--,U4

.4 M:*<5DS &4 d4 "9;G6:6 C5 ;<6E76B =69C5: :5IC9<5=:57E4 :&*5O P-(= D5-<O C5#O !CD XR5 /^N/b/^N-

R2--.U4

f4 d8G9=65S 04 "4S h;e6BB8=S m4 n M6ICES "4 "4 !<I:B =6j<9 69;G6:K6;7:9C6B D9<8A J9<= =69C5:

AB65Z7<54 P-(>&% QFG5 2+Nb2+- R2--.U4

+4 d8G9=65S 04 "4 n M6ICES "4 "4 TCF:EA9:6F "9;G6:6 65F 5<I:B Y6;7:9C6 J9<= 7G: F::A E:6 6E EG<35 KH

2^@ 9%!" D:5: E:X8:5;:E4 E-&O N5*=O :&*6O C%&O >FN5 .L/b.N/ R2--LU4

/4 d8G9=65S 04 "4 n )8I:95:HS e4 e4 h69C5: =C;9<KC6B FCI:9EC7H E78FC:E IC6 2^@ 9%!" E:X8:5;:E[ ;B<5C5D

9:E8B7E J9<= ;<6E76B 367:9E 65F ;<857C5D <J 567CI: 69;G6:6 3C7G `8<9:E;:57 EC5DB: A9<K:E4 DG>-(O N5*=O

Q?5 fb2/ R2--NU4

^4 M:*<5DS &4 d4S #6HB<9S *4 #4S h69EGS #4 *4 n V9:E7<5S e4 h4 (CE86BC_67C<5 65F :58=:967C<5 <J =69C5:

AB65Z7<5C; D&57-%- 65F F-5(%&#- KH 8EC5D A<BH9CK<58;B:<7CF: A9<K:E 65F `8<9:E;:57 #" '#(>

GHK9CFC_67C<54 D22=O N"$#&*"O E#5&*Q#*=O GF5 ///+b//^f R2---U4

L4 m69BS M4 h4 n *8Z6ES %4 #G: O636CC );:65 #C=:QE:9C:E RO)#U A9<D96=[ Y6;ZD9<85FS 967C<56B: 65F

W:BF C=AB:=:5767C<54 1%%2RC%- ;%'O AQ5 2.-b2/^ R2--^U4

N4 V<97:9S m4 n d:CDS 14 @4 #G: 8E: <J M"Va J<9 CF:57CJHC5D 65F ;<857C5D 6X867C; =C;9<`<964 J#3"*=O

45%-"*6&O ?F5 -+fb-+N R2-N,U4

-4 OC;ZES %4 &4S "=655S %4 a4 n @76GBS M4 "4 M86B E76C5C5D <J 567896B K6;7:9C<AB65Z7<5 3C7G +"S ^QFC6=CFC5<Q.QAG:5HBC5F<B: 65F `8<9:E;:57 <BCD<58;B:<7CF: A9<K:E 769D:7C5D ZC5DF<=QB:I:B 2^@ 9%!"

E:X8:5;:E4 D22=O N"$#&*"O E#5&*Q#*=O FX5 .2/Nb.2^f R2--.U4

2,4 h6EE656S %4S h8996HS "4 &4S V9:E7<5S e4 h4 n M:*<5DS &4 d4 (:97C;6B FCE79CK87C<5 65F AGHB<D:5:7C;

;G696;7:9C_67C<5 <J=69C5: AB65Z7<5C;D&57-%- C5 7G: @6576 Y69K696 eG655:B4D22=O N"$#&*"OE#5&*Q#*=O

GQ5 /,b/^ R2--LU4

224 h8996HS "4 &4 %( -=O " 7C=: E:9C:E 6EE:EE=:57 <J AB65Z7<5C; 69;G6:6B I69C6KCBC7H C5 7G: @6576 Y69K696

eG655:B4 DG>-(O E#5&*QO N5*=O ?N5 2.-b2+/ R2---U4

2.4 )BE:5S o4 04 "9;G6:6S 69;G6:6 :I:9H3G:9:4 P-(>&% QM>5 ^/Lb^/N R2--+U4

2f4 @7:C5S 04 *4 n @C=<5S h4 a4 "9;G6:6B 8KCX8C7H4 :&*5O P-(= D5-<O C5#O !CD RQ5 ^..Nb^.f, R2--^U4

2+4 M:*<5DS &4ST8S m4 14S V9:p_BC5S Y4 Y4 n 0<IC5:S %4 (4h4OCDG 6K85F65;: <J "9;G6:6 C5 "5769;7C;=69C5:

AC;<AB65Z7<54 P-(>&% QM>5 ^-/b^-L R2--+U4

$%&&%'( &) *+&,'%

!"#$%& ' ()* +,- ' ./ 0"!$"%1 .,,2 ' 333456789:4;<= !".© 2001 Macmillan Magazines Ltd

Page 4: J409 25d 507....44444444444444444444444444444444444444444444444444444444444444444!!!!! +*2 F@>>. –1 0

2/4 h6EE656S %4 %( -=O (:97C;6B FCE79CK87C<5 65F 7:=A<96B I69C67C<5 <J =69C5: AB65Z7<5C; "9;G6:6 C5 7G:

o:9B6;G: E796C7S "5769;7C;6S F89C5D :69BH EA9C5D4 J#3"*=O 45%-"*6&O AQ5 ^,Lb^2L R2--NU4

2^4 "=655S %4 a4S m98=G<B_S *4 n @76GBS M4 "4 dB8<9:E;:57Q<BCD<58;B:<7CF: A9<KC5D <J 3G<B: ;:BBE J<9

F:7:9=C567CI:S AGHB<D:5:7C;S 65F :5IC9<5=:576B E78FC:E C5 =C;9<KC<B<DH4 SO F-5(%&#*=O >M?5 L^.bLL,

R2--,U4

2L4 *::S @4 n m:=AS V4 d4 @C5DB:Q;:BB %!" ;<57:57 <J 567896B =69C5: AB65Z7<5C; K6;7:9C6 =:6E89:F KH

GHK9CFC_67C<5 3C7G =8B7CAB: 2^@ 9%!"Q769D:7:F `8<9:E;:57 A9<K:E4 J#3"*=O 45%-"*6&O QR5 N^-bNL-

R2--+U4

2N4 h8996HS "4 &4 %( -=O @:6E<56B 65F EA67C6B I69C6KCBC7H <J K6;7:9C6B 65F 69;G6:6B 6EE:=KB6D:E C5 7G: ;<6E76B

367:9E 5:69 "5I:9E CEB65FS "5769;7C;64 D22=O N"$#&*"O E#5&*Q#*=O GA5 ./N/b./-/ R2--NU4

2-4 oB<q;Z5:9S d4 )4S d8;GES Y4 h4 n "=655S %4 Y6;7:9C<AB65Z7<5 ;<=A<EC7C<5E <J B6Z:E 65F <;:65E[ 6 W9E7

;<=A69CE<5 K6E:F <5 `8<9:E;:5;: #" '#(> GHK9CFC_67C<54 D22=O N"$#&*"O E#5&*Q#*=O GF5 fL.2bfL.^

R2---U4

.,4 @C=<5S h4S oB<q;Z5:9S d4 )4 n "=655S %4 MCJJ:9:57 ;<==85C7H E798;789: 65F 7:=A:96789: <A7C=6 <J

G:7:9<79<AGC; AC;<AB65Z7<5 C5 I69C<8E 9:DC<5E <J 7G: @<87G:95 );:654 DG>-(O E#5&*QO N5*=O >X5 .L/b

.N+ R2---U4

.24 !6D676S #4S d8Z8F6S O4S d8Z8F6S %4 n m<CZ:S a4 Y6;7:9C<AB65Z7<5 FCE79CK87C<5 65F A9<F8;7C<5 C5 F::A

V6;CW; 367:9E[ *69D:QE;6B: D:<D96AGC; I69C67C<5E 65F A<EECKB: ;<8ABC5D 3C7G EC5ZC5D A697C;B: `8g:E4

J#3"*=O 45%-"*6&O AF5 +.^b+f/ R.,,,U4

..4 e<897C:ES e4 %( -=O @=6BB:E7 :8Z69H<7C; <9D65CE=4 P-(>&% QMN5 .// R2--+U4

.f4 l3:CJ:BS $4 *4 nO6DE79<q=S "r 4 #<76B ;<857E <J=69C5: K6;7:9C6 C5;B8F: 6 B69D: J96;7C<5 <J 5<5Q58;B:<CFQ

;<576C5C5D K6;7:9C6 RDG<E7EU4 D22=O N"$#&*"O E#5&*Q#*=O G>5 .2N,b.2N/ R2--/U4

.+4 m695:9S h4 n d8G9=65S 04 M:7:9=C567C<5 <J 6;7CI: =69C5: K6;7:9C<AB65Z7<5[ 6 ;<=A69CE<5 <J

85CI:9E6B 2^@ 9%!" A9<K:ES 687<96FC<D96AGHS 65F 58;B:<CF E76C5C5D4 D22=O N"$#&*"O E#5&*Q#*=O GQ5

2.,Nb2.2f R2--LU4

./4 TCBBC6=ES V4 h4S e69B8;;CS "4 d4 n)BE<5S %4 " F::A A9<WB: <J E<=: KC<B<DC;6BBH C=A<97657 A9<A:97C:E C5

7G: ;:5796B !<97G V6;CW; DH9:4 45%-"*=O D5(- Q5 +L2b+L^ R2-N,U4

.^4 h:569FS O4 T4 n @=C7GS @4 h4 OHAE<=:79H <J <;:65 K6EC5 A9<IC5;:E4 SO T%*27)'O ;%'O M>5 +f,/b+f./

R2-^^U4

Y6::/$2$(,'-4 +(=%-2',+%( CE 6I6CB6KB: <5 P-(>&%PE T<9BFQTCF: T:K EC7:RG77A[kk333456789:4;<=U <9 6E A6A:9 ;<AH J9<= 7G: *<5F<5 :FC7<9C6B <JW;: <J P-(>&%4

=9>6/?5&0#&3&6-1

T: 7G65Z 7G: ;9:3 <J 7G: ;U E*-"- V-$%S *4 #8A6E 65F m4 Yj<q9Z=65 J<9 G:BA 3C7GE6=ABC5D4 #4 #6HB<9 G:BA:F E765F69FC_C5D A9<KC5D A9<7<;<BES 65F *4 d8jC:ZC A9<ICF:F;<=A8767C<56B E8AA<974 #GCE E78FH 36E E8AA<97:F KH !)""Q@:6D9657 )JW;: RhYmkMhmUS !@d RMhmUS 65F E8AA<97 J9<= 7G: M6ICF 65F *8;CB: V6;Z69F d<85F67C<5 R&dMU4#GCE CE @)&@# ;<579CK87C<5 58=K:9 /f2f 65F $@ 0o)d@ ;<579CK87C<5 58=K:9 ^+L4

e<99:EA<5F:5;: 65F 9:X8:E7E J<9 =67:9C6BE EG<8BF K: 6FF9:EE:F 7< h4Y4m4R:Q=6CB[ =Z695:9sE<:E74G636CC4:F8U4

$%&&%'( &) *+&,'%

!/" !"#$%& ' ()* +,- ' ./ 0"!$"%1 .,,2 ' 333456789:4;<=

44444444444444444444444444444444444444444444444444444444444444444D&.-+,0 E%*+'-),F. "8'& >+-$#)*/&-+-+), G&->&&, "&'%-+C&.H-8%"- !: I&.->< 6%"-J, K: 68""%J>< L%"'). !: 6%#$%()?<!.$'&+0$ H: K"+24,> B =(>%"( !''&, E&""&t

> H"'(#(>(% *+ K%==0 D"#3-= W :*2>=-(#*" F#*=*6)0 !"#$%&'#() *+ N<#"Q>&670N<#"Q>&67 N,? MSX0 !Y?1%2-&(3%"( *+ T%"%(#5'0 ;>(6%&' !"#$%&'#()0 :#'5-(-.-)0 P%. S%&'%) 9AALZ0 !CDt C3#(7'*"#-" X&*2#5-= ;%'%-&57 H"'(#(>(%0 D2-&(-<* B9IB0 F-=Q*-0;%2>Q=#5 *+ :-"-3-

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

H'2+/,%()*>5? ,#$%-4 %= E+( *$/$&,+%( *600$*,* ,#', +(9+7+96'/**#%6/9 *#%I /$** '00-$**+%(5 '(9 2%-$ '/,-6+*25 ,%I'-9* &/%*$-E+(! 3$&$(, ,#$%-$,+&'/ I%-E #'*5 #%I$7$-5 *600$*,$9 ,#', &%2:$8,+,+%( 1$,I$$( -$/',+7$* &'( &%6(,$-'&, E+( *$/$&,+%( =%- '/,-68+*2Q@>>! Z(=%-,6(',$/45 ='&,%-* ,#', ,$(9 ,% +(&-$'*$ ,#$ '7$-'0$-$/',$9($** %= +(,$-'&,+(0 +(9+7+96'/*[*6&# '* /+2+,$9 9+*:$-8*'/['/*% ,$(9 ,% +(&-$'*$ ,#$ '2%6(, %= &%2:$,+,+%( 1$,I$$(-$/',+7$*! "#$-$=%-$5 +( 2%*, (',6-'/ *4*,$2*5 ,#$ &%(U+&,+(0+(U6$(&$* %= +(&-$'*$9 &%2:$,+,+%( '(9 +(&-$'*$9 -$/',$9($** '-$&%(=%6(9$95 /+2+,+(0 ',,$2:,* ,% ,$*, ,#$%-4A5X@>N! V+0 I'*: ,'W'$W#+1+, 7'-4+(0 /$7$/* %= '00-$**+%( '2%(0 (%(89+*:$-*+(0 2'/$*,#', *#%I ' -'(0$ %= '7$-'0$ -$/',$9($** /$7$/*! "#6*5 '&-%***:$&+$*5 ,#$ $==$&,* %= -$/',$9($** '(9 &%2:$,+,+%( 1$,I$$( -$/'8,+7$* &'( 1$ *$:'-',$9! H$-$ I$ -$:%-, ,#',[&%(,-'-4 ,% H'2+/8,%()* %-+0+('/ :-$9+&,+%(>5?5>? 16, +( '0-$$2$(, I+,# -$&$(,

,#$%-4F@>>[,#$ /$7$/ %= D0#,+(0 1$,I$$( 2'/$* *#%I* (% &%--$/'8,+%( I+,# ,#$ $*,+2',$9 -$/',$9($** %= +(,$-'&,+(0 2'/$*5 16, +*($0',+7$/4 &%--$/',$9 I+,# =6,6-$ 2',+(0 %::%-,6(+,+$*!O6=CB7<5PE 98B:2S. A9<ICF:E 6 7<<B J<9 85F:9E765FC5D 6 965D: <J

E<;C6B C57:96;7C<5ES C5;B8FC5D 6B798CE=S 6DD9:EEC<5S E:BWEG5:EE 65FEAC7:4 a7 E767:E 7G67 6B798CE= R<9 B:EE 6DD9:EEC<5U CE J6I<89:F 3G:5&Q " 5 ! ,S 3G:9: 5 CE 7G: W75:EE ;<E7 7< 7G: 6B798CE7S Q CE 7G: W75:EEK:5:W7 7< 7G: K:5:W;C69H 65F & CE 7G:C9 D:5:7C; 9:B67:F5:EE4 d<9 6DCI:5 K:5:W7 65F ;<E7S 7G: :I<B87C<5 <J 6B798CE= 7G:9:J<9: 9:BC:E8A<5 6 E8JW;C:57BH GCDG 9:B67:F5:EE K:73::5 C57:96;7C5D C5FCICF86BE4O6=CB7<5. <9CDC56BBH E8DD:E7:F 7G67 6 GCDG 9:B67:F5:EE ;<8BF 69CE: C573< 36HE[ R2U K:G6IC<89 K6E:F 8A<5 FC9:;7 ZC5 9:;<D5C7C<5 K:73::5C5FCICF86BES <9 R.U BC=C7:F FCEA:9E6B RA<A8B67C<5 ICE;<EC7HU4O<3:I:9S 7G: C=A<9765;: <J BC=C7:F FCEA:9E6B C5 C5;9:6EC5D 7G:

9:B67:F5:EE 6=<5D C57:96;7C5D C5FCICF86BE 65F J6I<89C5D 6B798CE=G6E K::5 ;<579<I:9EC6Bfb224 O6=CB7<5PE <9CDC56B E8DD:E7C<5 G6E K::5;<57:E7:F K:;68E: BC=C7:F FCEA:9E6B ;65 6BE< C5;9:6E: ;<=A:7C7C<5K:73::5 5:CDGK<89C5D 9:B67CI:ES 3GC;G <AA<E:E 7G: :I<B87C<5 <J6B798CE7C; K:G6IC<89fb224 $5J<978567:BHS :=AC9C;6B 7:E7E <J 7G:<9HS7G67 F:7:9=C5: 7G: 9:B67CI: C=A<9765;: <J C5;9:6E:E C5 K<7G 9:B67:FQ5:EE 65F ;<=A:7C7C<5 K:73::5 9:B67CI:ES G6I: K::5 GC5F:9:F K:;68E:K<7G J6;7<9E 69: C5`8:5;:F KH FCEA:9E6BS 65F E< 7G:C9 :JJ:;7E 69:8E86BBH ;<5J<85F:F+SNb2,4#G: I69C6KB: J<9= <J =67: ;<=A:7C7C<5 65F A<A8B67C<5 E798;789:

6;9<EE WD 36EA EA:;C:E 3C7G3C5DB:EE =6B:E <JJ:9E 65 <AA<9785C7H J<9FCE:5765DBC5D 7G: ;<5J<85F:F :JJ:;7E <J 9:B67:F5:EE 65F ;<=A:7CQ7C<5 K:73::5 9:B67CI:E C5 ICE;<8E A<A8B67C<5E2.b2N4 dCD 36EAE 69:EA:;C:E 7G67 F:I:B<A 3C7GC5 7G: J98C7 <J WD 79::ES 65F C5;B8F:=8786BCE7C; A<BBC567C5D EA:;C:E 6E 3:BB 6E A696EC7C; 5<5QA<BBC567C5DEA:;C:E2/4 a5 =65H EA:;C:E 7G: =6B:E 69: 3C5DB:EES 65F =67: 3C7G 7G:3C5D:F J:=6B:E K:J<9: 7G: J:=6B:E FCEA:9E:4 #G: B:I:B <J 6DD9:EEC<5K:73::5 7G:E: 5<5QFCEA:9EC5D =6B:E I69C:E :5<9=<8EBH 6;9<EEEA:;C:E2.b2/S2N4 "7 <5: :g79:=:S =6B:E <J E<=: 5<5QA<BBC567C5DEA:;C:E 69: GCDGBH =<FCW:F J<9 ;<=K67 3C7G 69=<89:F K<FC:E 65FG8D: =65FCKB:E4 #G:E: =65FCKB:E 69: 8E:F 7< 7:69 E<J7 7CEE8: 65FE:I:9 K<FH A697ES C5;B8FC5D BC=KES G:6F 65F 6KF<=:5S 65F ;659:E8B7 C5 :g79:=:BH GCDG=<976BC7H B:I:BE4 "7 7G: <7G:9 :g79:=:S =6B:E<J <7G:9 5<5QA<BBC567C5D 65F =<E7 A<BBC567C5D EA:;C:E EG<3 5<=<FCW;67C<5E J<9 ;<=K67 <9 6DD9:EEC<54";9<EE 7G:E: EA:;C:ES 7G: 6I:96D: 9:B67:F5:EE <J ;<=A:7C5D =6B:E

I69C:E :5<9=<8EBH <3C5D 7< I69C67C<5 C5 7G: 58=K:9 <J J:=6B:E 7G67B6H :DDE C5 :6;G J98C72.b2^4 d<9 :g6=AB:S CJ <5BH <5: J:=6B: B6HE :DDE C56 J98C7 7G:5 6BB 7G: ;<=A:7C5D =6B:E 3CBB K: K9<7G:9E] C5;9:6EC5D58=K:9E <J J:=6B:E B6HC5D :DDE C5 6 J98C7 3CBB B:6F 7< =6B:E

–2

–1

0

1

2

Mea

n in

jury

leve

l (LE

I) co

ntra

sts

0.00 0.05 0.10 0.15 0.20 0.25 0.30

Relatedness contrasts

!"#$%& ' L+,# -#T%&7 (+.+( 1"#$&,)$) '("$$+0 ,4,-#)$ +)$-8,$+0 &+(,$+0#+)) 1"#$&,)$)C>1&")) )'+1-+)= $3+ 8+,# -#T%&7 (+.+( P(-*+$-8+ +U$+#$ "* -#T%&7= ?NFR ,#0 $3+ '&"'"&$-"# "*

-#0-.-0%,() )+.+&+(7 -#T%&+0 PKFR )3"2+0 #" )-4#-B1,#$ &+(,$-"#)3-' 2-$3 +)$-8,$+0

&+(,$+0#+)) P?NFV ,(( 1"#$&,)$)= & P5=5WR X 5CY5= ' Z X YCY[= ( X YC\\O #"$ -#1(%0-#4

1"#$&,)$) 2-$3-# $3+ '"((-#,$"& (-#+,4+= & P5=55R X YC]Z= ' Z X YCY[= ) X YCMZO KFV ,((

1"#$&,)$)= & P5=5WR X YCYM= ' Z $ YCY5= ( X YC^MO #"$ -#1(%0-#4 1"#$&,)$) 2-$3-# $3+

'"((-#,$"& (-#+,4+= & P5=55R X YCYW= ' Z $ YCY5= ( X YC^\RC !-&1(+)= 1"#$&,)$) /+$2++# $3+

#"#6'"((-#,$-#4 )'+1-+)O )Q%,&+)= 1"#$&,)$) /+$2++# $3+ '"((-#,$"& )'+1-+)O $&-,#4(+= $3+

1"#$&,)$ /+$2++# '"((-#,$"&) ,#0 #"#6'"((-#,$"&)C

© 2001 Macmillan Magazines Ltd