Publications by authors named "C Daniel Cadena"
Global inequality rooted in legacies of colonialism and uneven development can lead to systematic biases in scientific knowledge. In ecology and evolutionary biology, findings, funding and research effort are disproportionately concentrated at high latitudes, while biological diversity is concentrated at low latitudes. This discrepancy may have a particular influence in fields like phylogeography, molecular ecology and conservation genetics, where the rise of genomics has increased the cost and technical expertise required to apply state-of-the-art methods.
View Article and Find Full Text PDFChanges in the migration phenology of birds linked to global change are extensively documented. Longitudinal studies from temperate breeding grounds have mostly shown earlier arrivals in the spring and a variety of patterns during fall migration, yet no studies have addressed whether and how migration phenology has changed using data from the tropical non-breeding grounds. Understanding whether changes in migratory phenology are also evident in non-breeding sites is essential to determining the underlying causes of patterns documented in breeding areas.
View Article and Find Full Text PDFArticle Synopsis
- Hummingbirds are known for their unique hovering ability, which is a energy-intensive flying method, and they undergo a costly molt to replace their primary feathers.
- This study analyzed high-speed videos of molting and non-molting hummingbirds to compare their wing movements and flight patterns.
- Results showed that molting hummingbirds adjusted their wing angles during flight, allowing them to maintain hovering capability despite having reduced wing area.
Article Synopsis
- The study investigates how male traits, territorial characteristics, and testosterone levels in two species of poison frogs are intertwined, particularly in the context of sexual selection.
- Researchers focused on Allobates aff. trilineatus, which shows male care during breeding, and Oophaga lehmanni, which exhibits maternal care year-round, to examine correlations between territory size/quality and male traits like morphology and calls.
- Results indicate that while certain male traits are linked to territorial features, the nature of these relationships varies by species; more research is needed to determine if females select males based on these traits.