Zachary Ryan Hanna

University of California, Berkeley | UCB · Museum of Vertebrate Zoology

Spotted owls (SO, Strix occidentalis) are a flagship species inhabiting old-growth forests in Western North America. In recent decades, their populations have declined due to ongoing reductions in suitable habitat caused by logging, wildfires, and competition with the congeneric barred owl (BO, Strix varia). The northern spotted owl (S. o. caurina)...

Spotted owls (SO, Strix occidentalis) are a keystone species inhabiting old-growth forests in Western North America. In recent decades, their populations have declined due to ongoing reductions in suitable habitat caused by logging, wildfires, and competition with the congeneric barred owl (BO, Strix varia). The northern spotted owl (subspecies S....

We used molecular data to assess the degree of genetic divergence across the breeding range of the orange-crowned warbler ( Oreothlypis celata ) in western North America with particular focus on characterizing the divergence between O. celata populations on the mainland of southern California and on the Channel Islands. We obtained sequences of the...

We used molecular data to assess the degree of genetic divergence across the breeding range of the orange-crowned warbler ( Oreothlypis celata ) in western North America with particular focus on characterizing the divergence between O. celata populations on the mainland of southern California and on the Channel Islands. We obtained sequences of the...

We used molecular data to assess the degree of genetic divergence across the breeding range of the orange-crowned warbler ( Oreothlypis celata ) in western North America with particular focus on characterizing the divergence between O. celata populations on the mainland of southern California and on the Channel Islands. We obtained sequences of the...

As the barred owl (Strix varia; Aves: Strigiformes: Strigidae) expands throughout western North America, hybridization between barred and spotted owls (Strix varia and S. occidentalis, respectively), if abundant, may lead to genetic swamping of the endangered spotted owl. We analyzed low-coverage, whole-genome sequence data from fifty-one barred an...

Supplementary details of materials and methods for article entitled 'Whole-genome sequences suggest long term declines of spotted owl (Strix occidentalis) (Aves: Strigiformes: Strigidae) populations in California'.

As the barred owl ( Strix varia ; Aves: Strigiformes: Strigidae) expands throughout western North America, hybridization between barred and spotted owls ( Strix varia and S. occidentalis , respectively), if abundant, may lead to genetic swamping of the endangered spotted owl. We analyzed low-coverage, whole-genome sequence data from fifty-one barre...

We analyzed whole-genome data of four spotted owls ( Strix occidentalis ) to provide a broad-scale assessment of the genome-wide nucleotide diversity across S. occidentalis populations in California. We assumed that each of the four samples was representative of its population and we estimated effective population sizes through time for each corres...

Supplementary details of materials and methods for article entitled 'Whole-genome sequences suggest long term declines of spotted owl (Strix occidentalis) (Aves: Strigiformes: Strigidae) populations in California'.

Supplementary details of materials and methods for article entitled 'Whole-genome sequences suggest long term declines of spotted owl (Strix occidentalis) (Aves: Strigiformes: Strigidae) populations in California'.

We report here the successful assembly of the complete mitochondrial genomes of the northern spotted owl ( Strix occidentalis caurina ) and the barred owl ( S. varia ). We utilized sequence data from two sequencing methodologies, Illumina paired-end sequence data with insert lengths ranging from approximately 250 nucleotides (nt) to 9,600 nt and re...

We report here the assembly of a northern spotted owl (Strix occidentalis caurina) genome. We generated Illumina paired-end sequence data at 90x coverage using nine libraries with insert lengths ranging from ~250 to 9,600 nt and read lengths from100 to 375 nt. The genome assembly is comprised of 8,108 scaffolds totaling 1.26 * 109 nt in length with...

We report here the successful assembly of the complete mitochondrial genomes of the northern spotted owl ( Strix occidentalis caurina ) and the barred owl ( S. varia ). We utilized sequence data from two sequencing methodologies, Illumina paired-end sequence data with insert lengths ranging from approximately 250 nucleotides (nt) to 9,600 nt and re...

We report here the successful assembly of the complete mitochondrial genomes of the northern spotted owl ( Strix occidentalis caurina ) and the barred owl ( S. varia ). We utilized sequence data from two sequencing methodologies, Illumina paired-end sequence data with insert lengths ranging from approximately 250 nucleotides (nt) to 9,600 nt and re...

We describe the isolation of 10 microsatellite loci with tetranucleotide repeat motifs from the Orange-crowned Warbler (Oreothlypis celata) by using an enrichment protocol. All 10 loci were variable across two sampled populations (Alaska, California Channel Islands); the number of alleles ranged from 2-23, and observed heterozygosity ranged from 0....

Laboratory techniques for high-throughput sequencing have enhanced our ability to generate DNA sequence data from millions of natural history specimens collected prior to the molecular era, but remain poorly tested at shallower evolutionary time scales. Hybridization capture using restriction site-associated DNA probes (hyRAD) is a recently develop...

Here we provide evidence to support an extension of the recognized distributional range of the Mountain Elaenia ( Elaenia frantzii ) to include southern Mexico. We collected two specimens in breeding condition in northwestern Sierra Norte de Chiapas, Mexico. Morphologic and genetic evidence support their identity as Elaenia frantzii . We compared e...

We here provide evidence to support an extension of the recognized distributional range of the Mountain Elaenia (Elaenia frantzii) to include southern Mexico. We collected two specimens in breeding condition in northwestern Sierra Norte de Chiapas, Mexico. Morphologic and genetic evidence support their identity as Elaenia frantzii. We compared envi...

We here provide evidence to support an extension of the recognized distributional range of the Mountain Elaenia (Elaenia frantzii) to include southern Mexico. We collected two specimens in breeding condition in northwestern Sierra Norte de Chiapas, Mexico. Morphologic and genetic evidence support their identity as Elaenia frantzii. We compared envi...

We report here the genome sequence of a circular virus isolated from samples of an Alaskan black-capped chickadee ( Poecile atricapillus ) gastrointestinal tract. The genome is 2,152 bp in length and is most similar (30 to 44.5% amino acid identity) to the genome sequences of other single-stranded DNA (ssDNA) circular viruses belonging to the gemyc...