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5 results for “Sphyrapicus varius”
Introgression between Sphyrapicus nuchalis and S. varius sapsuckers in a hybrid zone in west-central Alberta
<p>Studying species interactions at hybrid zones allows biologists to understand the forces that promote speciation. Hybridization among <i>Sphyrapicus nuchalis</i>, <i>S. varius</i>, and <i>S. ruber</i> has long been acknowledged, and hybrid zones between <i>S. nuchalis/S. ruber</i> and <i>S. varius/S. ruber</i> have been characterized with both genetic and genomic data. Using a combination of next-generation Restriction Site-Associated DNA sequencing (RAD-Seq) and traditional genetic methods, we examined patterns of introgression in the poorly characterized <i>S. nuchalis/S. varius</i> contact zone; the two most similar species in the complex, though they are not each other's closest relatives. We found high introgression rates, with several early and many advanced generation hybrids along a 275 km stretch of Rocky Mountain foothill, pointing to a well-established hybrid zone with hybrid individuals backcrossing with individuals from the parental species and each other. Plumage colouration in the hybrid zone was a relatively poor indicator of parental or hybrid status, which could be attributed to the possible involvement of few large effect genes.</p>
Introgression between Sphyrapicus nuchalis and S. varius sapsuckers in a hybrid zone in west-central Alberta
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Hubbard Brook site, station 10-hectare bird count plot at Hubbard Brook Experimental Forest, study of animal abundance of Sphyrapicus varius (yellow-bellied sapsucker) in units of numberPer10Hectares on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains animal abundance of Sphyrapicus varius (yellow-bellied sapsucker) measurements in numberPer10Hectares units and were aggregated to a yearly timescale.
Data from: Population genetics and speciation of yellow-bellied, red-naped, and red-breasted sapsuckers (Sphyrapicus varius, S. nuchalis, and S. ruber)
The root of understanding speciation lies in determining the forces which drive it. In many closely-related species, including Sphyrapicus varius, S. nuchalis, and S. ruber, it is assumed that speciation occurred due to isolation in multiple Pleistocene refugia. We used genetic data from 457 samples at the control region, COI, and CHD1Z to examine rangewide population genetic structure and differentiation amongst these three species across each species' breeding range. In addition, we modelled these species' ecological niches for the Holocene (~6,000 ya), Last Glacial Maximum (~22,000 ya), and Last Interglacial (~120,000-140,000 ya) to determine if Pleistocene glaciations could have contributed to allopatric distributions, therefore allowing these groups to differentiate. Population genetic data show a potential Pleistocene refugium in Haida Gwaii, an east-west split among S. varius, and low genetic differentiation within each species. Our control region data show some polyphyly, while COI and CHD1Z data show differentiation among species using composite genotypes. Ecological Niche Modelling shows a large amount of niche overlap at each time period suggesting that S. varius, S. nuchalis, and S. ruber may not have been completely allopatric, and these species likely had repeated intermittent contact. Our data support the growing body of research that suggests differentiation despite gene flow.
Data from: Population genetics and speciation of yellow-bellied, red-naped, and red-breasted sapsuckers (Sphyrapicus varius, S. nuchalis, and S. ruber)
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