Productivity in a German Osprey population

The Osprey is an emblematic example of conservation. Currently, the species is progressively recovering in population size and range after dramatic reductions as a consequence of human persecution and the use of pesticides in the nineteenth and twentieth centuries. Here, the population trend and productivity were analysed in relation to the nesting substrate and the protection status of the nest location.

Spatiotemporal dynamics of genetic variation in the Iberian lynx along its path to extinction reconstructed with ancient DNA

There is the tendency to assume that endangered species have been both genetically and demographically healthier in the past. The Iberian lynx suffered a dramatic and continuous decline during the 20th century. Ancient, historical, and contemporary samples with microsatellite and mitogenome data were analyzed to reconstruct the species' demography and investigate patterns of genetic variation across space and time.

The diet of the bottlenose dolphin described by stomach content and stable isotope analyses

The ecological role of species can vary among populations depending on local and regional differences in diet. This is particularly true for top predators such as the bottlenose dolphin, which exhibits a highly varied diet. Local dietary assessments are therefore critical to fully understand the role of this species within marine ecosystems. Here, stomach content analyses and stable isotope analyses were combined to describe bottlenose dolphins diet in the Gulf of Cadiz.

The challenges of building Essential Biodiversity Variables

Much biodiversity data is collected worldwide, but it remains challenging to assemble the scattered knowledge for assessing biodiversity status and trends. The concept of Essential Biodiversity Variables (EBVs) was introduced to structure biodiversity monitoring globally. Here, the challenges of a ‘Big Data’ approach to building global EBV data products across taxa and spatiotemporal scales is assessed, focusing on species distribution and abundance.

The juvenile dispersal distances of the Spanish imperial eagle

The distribution of juvenile dispersal distances of a territorial long-lived species with deferred maturity, the Spanish imperial eagle, was investigated. A reintroduction program was used as an experimental approach to test predictions of different hypotheses about the distribution of juvenile dispersal distances: competition and wandering behavior. The maximal juvenile dispersal distances of 59 young eagles were determined