3 Works

Data from: Genetic rediscovery of an ‘extinct’ Galápagos giant tortoise species

Ryan C. Garrick, Edgar Benavides, Michael Russello, James Gibbs, Nikos Poulakakis, Kirstin Dion, Chaz Hyseni, Brittney Kajdacsi, Lady Márquez, Sarah Bahan, Claudio Ciofi, Washington Tapia, Adalgisa Caccone, Kirstin B. Dion, James P. Gibbs & Michael A. Russello
Genes from recently extinct species can live on in the genomes of extant individuals of mixed ancestry. Recently, Poulakakis et al. detected genetic signatures of the giant Galápagos tortoise once endemic to Floreana Island (Chelonoidis elephantopus) within eleven hybrid individuals of otherwise pure C. becki on Volcano Wolf, Isabela Island. Movement of tortoises among islands by pirate and whaling ships was not uncommon during the 1800’s, representing a likely mechanism by which individuals from Floreana...

Data from: Hybridization masks speciation in the evolutionary history of the Galápagos marine iguana

Amy MacLeod, Ariel Rodríguez, Miguel Vences, Pablo Orozco-TerWengel, Carolina García, Fritz Trillmich, Gabriele Gentile, Adalgisa Caccone, Galo Quezada & Sebastian Steinfartz
The effects of the direct interaction between hybridization and speciation—two major contrasting evolutionary processes—are poorly understood. We present here the evolutionary history of the Galápagos marine iguana (Amblyrhynchus cristatus) and reveal a case of incipient within-island speciation, which is paralleled by between-island hybridization. In-depth genome-wide analyses suggest that Amblyrhynchus diverged from its sister group, the Galápagos land iguanas, around 4.5 million years ago (Ma), but divergence among extant populations is exceedingly young (less than 50...

Landscape structure, bird, and vegetation recruitment in restoration plantations

Karen Holl, Miriam San Jose, Francis Joyce, Rakan Zahawi, Leland Werden & J. Leighton Reid
Reversing large-scale habitat degradation and deforestation goes beyond what can be achieved by site-level ecological restoration and a landscape ecology perspective is fundamental. Here we assess the relative importance of tree cover and its configuration on forest-dependent birds and late-successional tree seedlings in restoration sites in southern Costa Rica. The abundance and species richness of birds increased in landscapes with more corridors, higher tree cover, and lower levels of fragmentation, highlighting the importance of riparian...

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