Data from: Floral paedomorphy leads to secondary specialization in pollination of Malagasy Dalechampia (Euphorbiaceae)W. Scott Armbruster, Joongku Lee, Mary E. Edwards & Bruce G. Baldwin
The traditional evolutionary interpretation of Von Baer’s “laws” of embryology is that retention of early developmental forms into adulthood (paedomorphosis) leads to the evolution of simpler or more generalized morphology and ecology. Here we show that paedomorphosis can also be involved in an increase in ecological specialization, in this case of plant-pollinator relationships. A paedomorphic transition from generalized pollination (by several functional types of pollinators) to specialized pollination (by one or a few species in...
Ecosystems across the globe are threatened by climate change and human activities. New rapid survey approaches for monitoring biodiversity would greatly advance assessment and understanding of these threats. Taking advantage of next-generation DNA sequencing, we tested an approach we call metabarcoding: high-throughput and simultaneous taxa identification based on a very short (usually less than 100 base pairs) but informative DNA fragment. Short DNA fragments allow the use of degraded DNA from environmental samples. All analyses...
Within-species sexual segregation is a widespread phenomenon among vertebrates but its causes remain a topic of much debate. Female avoidance of male coercive mating attempts has the potential to influence the social structure of animal populations, yet it has been largely overlooked as a driver of sexual separation. Indeed, its potential role in long-term structuring of natural populations has not been studied. Here we use a comparative approach to examine the suitability of multiple hypotheses...
Data from: Locomotory abilities and habitat of the Cretaceous bird Gansus yumenensis inferred from limb length proportionsRobert L. Nudds, Jessie Atterholt, Xia Wang, H. L. You, Gareth J. Dyke, J. Atterholt, R. L. Nudds, X. Wang & H.-L. You
The relative length proportions of the three bony elements of the pelvic (femur, tibiotarsus and tarsometatarsus) and pectoral (humerus, ulna and manus) limbs of the early Cretaceous bird Gansus yumenensis, a well-represented basal ornithuromorph from China are investigated and compared to those of extant taxa. Ternary plots show that the pectoral limb length proportions of Gansus are most similar to Apodiformes (swifts and hummingbirds), which plot away from all other extant birds. In contrast, the...
Data from: New environmental metabarcodes for analysing soil DNA: potential for studying past and present ecosystemsLaura S. Epp, Sanne Boessenkool, Eva P. Bellemain, James Haile, Alfonso Esposito, Tiayyba Riaz, Christer Erséus, Vladimir I. Gusarov, Mary E. Edwards, Arild Johnsen, Hans K. Stenøien, Kristian Hassel, Håvard Kauserud, Nigel G. Yoccoz, Kari Anne Bråthen, Eske Willerslev, Pierre Taberlet, Eric Coissac & Christian Brochmann
Metabarcoding approaches use total and typically degraded DNA from environmental samples to analyse biotic assemblages and can potentially be carried out for any kinds of organisms in an ecosystem. These analyses rely on specific markers, here called metabarcodes, which should be optimized for taxonomic resolution, minimal bias in amplification of the target organism group and short sequence length. Using bioinformatic tools, we developed metabarcodes for several groups of organisms: fungi, bryophytes, enchytraeids, beetles and birds....
University of Southampton5
University of Oslo2
French National Centre for Scientific Research2
Institute of Vertebrate Paleontology and Paleoanthropology1
University of Pennsylvania1
Atomic Energy and Alternative Energies Commission1
Natural History Museum1
University of California, Berkeley1
University of Gothenburg1