vegetation corridors
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2014 ◽  
Vol 49 (3) ◽  
pp. 180-184 ◽  
Author(s):  
Mariana Ferreira Rocha ◽  
Marcelo Passamani ◽  
Mariana Yankous Gonçalves Fialho

2010 ◽  
Vol 33 (4) ◽  
pp. 711-715 ◽  
Author(s):  
Fábio de Almeida Vieira ◽  
Vivette Appolinário ◽  
Cristiane Gouvêa Fajardo ◽  
Dulcinéia de Carvalho

2009 ◽  
Vol 23 (4) ◽  
pp. 1180-1185 ◽  
Author(s):  
Fábio de Almeida Vieira ◽  
Dulcinéia de Carvalho

We studied patterns of genetic differentiation in a connected landscape with an interesting history of human habitat conversion that began two centuries ago, during the Brazilian colonization period. In the fragments of Brazilian Atlantic seasonal forest and corridors of secondary forest, Protium spruceanum is an abundant native, mass-flowering/insect-pollinated and bird-dispersed tree. Genetic diversity was analyzed from 230 individuals in five fragments (1 to 11.8 ha) and four corridors (460 to 1000 m length) using allozyme loci. We did not find evidence of inbreeding within fragments or corridors, but the proportion of heterozygotes (<IMG SRC="/img/revistas/abb/v23n4/a28simb1.gif" WIDTH=287 HEIGHT=96>) were significantly higher in fragments than in the secondary vegetation corridors, based on Goudet's G-test (P = 0.036). Genetic differentiation was low and no pattern of isolation by distance was detected. All fragments generally present low historical genetic differentiation with corridors that they are connected, indicating possible gene flow via seeds and pollen. Due to the consistently low differentiation observed among them and the absence of a significant reduction in gene diversity in second-growth forests, we conclude that corridors of second-growth forests would be an important alternative in the genetic connection of isolated forest fragments.


2007 ◽  
Vol 94 (3-4) ◽  
pp. 241-257 ◽  
Author(s):  
Liangmei Huang ◽  
Dehua Zhao ◽  
Jiazhen Wang ◽  
Jiyu Zhu ◽  
Jianlong Li

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