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Szacki J. 1999. Spatially structured populations: how much do they match the classic metapopulation concept? Landscape Ecol. 14: 369-380. Taylor P.D., Fahrig L., Henein K. and Merriam G. 1993. Connectivity is a vital element of landscape structure. Oikos 68: 571-5p0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph( @ X p  0H`x 8P h!"#$%&'(()@*X+p,-./012304H5`6x789:;<= >8?P@hABCDEFGH(I@JXKpLMNOPQRS0THU`VxWXYZ[\] ^8_P`habcdefgh(i@jXkplmnopqrs0tHu`v  PX YX Ch ^P N  M b x x p h   NH P H {x (   D F F I S Z0 c0 v y h ~ ~ 6m1P /j8 H ^ (  ;@xo`@C9xdh@P''A8H&@'x )@!+"2(#L$U%W&_'h((k)p *+,-H./ 08 x`H0pX@(hP8  571-589:;<= >8?P@hABCDEFGH(I@JXKpLMNOPQRS0THU`VxWXYZ[\] ^8_P`habcdefgh(i@jXkplmnopqrs0tHu`vxwxyz{|} ~8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xpyz{|} ~8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph(@Xp0H`x 8Ph( @ X p  0H`xx 8Ph(@Xp0H`xS0H`,( pL 8pWwFPm[" Up(s8&F%v8-0V`8?I,@ *` 8 4h 5 6 7H ? @ B L2X O:8 Pi Q S T( UK XP Y8 Z? [ ] ^ _ aX b c e( f hq( iM j l mj nr0 oZx rX s uc` wc x) |T - %h ( = kX p 4 b  e hX 5X k@ gP   X Mp p O ?   X O8 AX p  =h a ]]H^]_]`]bb@ebhghjhmi0ojqk({q~t@y{0{HXp 8(0h0pxh(bA(^60 ( P   33xHXh8{"y`N0zp0 H!^ "8#H`$%6&'x(Hx)#p*1+nc Smelters, Pennsylvania. Arch. Environm. Contam. Toxicol 25: 428-437. Szacki J. 1999. Spatially structured populations: how much do they match the classic metapopulation concept? Landscape Ecol. 14: 369-380. Taylor P.D., Fahrig L., Henein K. and Merriam G. 1993. Connectivity is a vital element of landscape structure. Oikos 68: 571-5 $ ,X h i    h (  H  0 i  E`   W0 F # !( "WH # $ % & 'J (r )P *Wx + ,6 -O . /[ 0 1 2x 38 4 5 6` 7 @ 8sP 9p : ;\ <n@ =Xh >ph ?h @= A BR C DP Eo l a 0`  p h E 9` ` , x ' Tx t | @ fH / U d erton Zinc Smelters, Pennsylvania. Arch. Environm. Contam. Toxicol 25: 428-437. Szacki J. 1999. Spatially structured populations: how much do they match the classic metapopulation concept? Landscape Ecol. 14: 369-380. Taylor P.D., Fahrig L., Henein K. and Merriam G. 1993. Connectivity is a vital element of landscape structure. Oikos 68: 571-5