Exploration and collection of rare helianthus species from Southeastern United States

A 10-day trip, encompassing 4600 km in the southeastern USA states of Tennessee, North Carolina, South Carolina, Georgia and Alabama, was made in October, 2003. Our primary objective was to locate populations of Helianthus eggertii, then on the USDI, Fish and Wildlife Service Threatened and Endangered Species list, and H. verticillatus, a candidate for endangered species status. Helianthus eggertii has since been de-listed (August 2005). An additional objective was to collect seeds of H. porteri, a species reclassified from Viguiera porteri, which is endemic to granite rock outcrops in Georgia. We collected seeds from 27 populations of the above three species plus three additional species, H. angustifolius, H. atrorubens, and H. smithii. Seed was deposited with the USDA-ARS North Central Regional Plant Introduction Station at Ames, Iowa (NCRPIS) from which 24 of the 27 collections are available for distribution. The three 'target' species were represented by 13 collections of H. eggertii, eight of H. porteri, and two of H. verticillatus; none of the three species were previously available from the NCRPIS sunflower collection. The availability of seed of these three species will allow researchers around the world the opportunity to investigate the potential of these wild Helianthus species to contribute useful traits to cultivated sunflower. Complete collection data has been loaded Into the USDA-ARS Germplasm Resource Information Network (GRIN), and is available on the internet (www.ars-grin.gov)

The use of barn owl Tyto alba pellets to assess population change in small mammals

Capsule: Barn Owl pellets can be used to assess population changes in small mammals though with certain important reservations. Aims: To conduct a large-scale, long-term analysis of pellets regurgitated by Barn Owls collected from a defined area of countryside within the UK south Midlands and compare results with those of other studies that have used pellet analysis to investigate the diet of Barn Owls. Methods: Over 61 000 Barn Owl pellets collected over 20 years in the south Midlands of England were analyzed. Results: We recorded a steady increase in the proportion of Field Voles in pellets over time at the expense of Wood Mice, and a positive relationship between various rainfall measures and the proportion of Field Voles in pellets.We suggest that the conclusions of previous studies of the diet of Barn Owls have often been predicated on inconsistent or untenable assumptions. Conclusion: We challenge some of the premises on which Barn Owl pellet analyses have traditionally been based.We do not think that either a shortage of Field Voles in pellets, or of pellets containing the remains of more, smaller prey items, are indicative of foraging difficulty. Barn Owl pellets can be used to assess population changes in small mammals, so long as possible causes of bias, which we discuss, are acknowledged

Multi-functionality and sustainability in the European Union’s forests

nonPeerReviewe