A5058431722- Genetic diversity and population structure
- Marine Invertebrate Physiology and Ecology
- Marine Biology and Ecology Research
- Marine Ecology and Invasive Species
- Developmental Biology and Gene Regulation
- Fish Ecology and Management Studies
- Cephalopods and Marine Biology
- Geology and Paleoclimatology Research
- Identification and Quantification in Food
- Paleontology and Stratigraphy of Fossils
- Marine and fisheries research
- Protist diversity and phylogeny
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Wildlife Ecology and Conservation
- Planarian Biology and Electrostimulation
- Genomics and Phylogenetic Studies
- Crustacean biology and ecology
- Marine animal studies overview
- Ichthyology and Marine Biology
- Environmental DNA in Biodiversity Studies
- Fish Biology and Ecology Studies
- Climate Change Policy and Economics
- Neurobiology and Insect Physiology Research
University of California, Los Angeles
2015-2024
Clifton Hospital
2023
Terasaki Foundation
2021
Planetary Science Institute
2014-2020
Freie Universität Berlin
2012-2015
Research Institute for Sustainability at GFZ
2013-2014
University of California System
2014
University of California, Berkeley
1992-2007
University of Chicago
2001
National Center for Ecological Analysis and Synthesis
2001
Global diversity curves reflect more than just the number of taxa that have existed through time: they also mirror variation in nature fossil record and way is reported. These sampling effects are best quantified by assembling analyzing large numbers locality-specific biotic inventories. Here, we introduce a new database this kind for Phanerozoic marine invertebrates. We apply four substantially distinct analytical methods estimate taxonomic quantifying correcting time Variation introduced...
A central question in the evolutionary diversification of large, widespread, mobile mammals is how substantial differentiation can arise, particularly absence topographic or habitat barriers to dispersal. All extant giraffes (Giraffa camelopardalis) are currently considered represent a single species classified into multiple subspecies. However, geographic variation traits such as pelage pattern clearly evident across range sub-Saharan Africa and abrupt transition zones between different...
▪ Abstract We examine the genetics of marine diversification along West Coast North America in relation to Late Neogene geology and climate region. Trophically important components diverse fauna, including kelp, alcid birds (e.g., auks, puffins), salmon, rockfish, abalone, Cancer crabs, appear have radiated during peaks upwelling primarily Miocene some cases secondarily Pleistocene. Phylogeographic barriers associated with Mio-Pliocene estuaries mid-California coast, Pliocene opening Gulf...
We present the genome of moon jellyfish Aurelia, a from cnidarian with medusa life stage. Our analyses suggest that gene gain and loss in Aurelia is comparable to what has been found its morphologically simpler relatives-the anthozoan corals sea anemones. RNA sequencing analysis does not support hypothesis taxonomically restricted (orphan) genes play an oversized role development Instead, broadly conserved across animals eukaryotes roles throughout cycle. All stages are significantly...
Over the last 15 years a striking pattern of diversification has been documented in fossil record benthic marine invertebrates. Higher taxa (orders) tend to originate onshore, diversify offshore, and retreat into deep-water environments. Previous studies attribute this macroevolutionary variety causes, foremost among them role nearshore disturbance providing opportunities for evolution novel forms accorded ordinal rank. Our analysis post-Paleozoic first appearances indicates that onshore...
It is paradigmatic in marine species that greater dispersal ability often, but not always, results gene flow and less population structure. Some of the exceptions may be attributable to studies confounded by comparison with dissimilar evolutionary histories, i.e. co-occurring are closely related or allopatric. Investigation sympatric sister species, contrast, should allow differences phylogeographic structure attributed reliably recently derived ability. Here, using mitochondrial DNA control...
SUMMARY Despite numerous attempts, classification of the Precambrian fossil Dickinsonia has eluded scientific consensus. This is largely because and its relatives are structurally simple, lacking morphological synapomorphies to clarify their relationship modern taxa. However, there increasing precedence for using ontogeny constrain enigmatic fossils, growth type species costata well understood. study formalizes connection between in —which grows by addition metameric units onto one end...
The POU genes represent a diverse class of animal-specific transcription factors that play important roles in neurogenesis, pluripotency, and cell-type specification. Although previous attempts have been made to reconstruct the evolution class, these studies limited by small number representative taxa, lack sequences from basally branching organisms. In this study, we performed comparative analyses on available genomes recovered through "gene fishing" better resolve topology gene tree. We...
Inferences drawn from the biology, function, and behavior of closely related living forms facilitate interpretation mode life groups known only fossil record. The choice phylogenetically relevant modern 'model organisms' can have critical bearing on resulting interpretations. biology ammonoids are often interpreted in light evidence derived study Nautilus. However, examination record cladistic analyses both indicate that coleoids much more to than is Coleoid differ dramatically Thus,...
Cnidaria have traditionally been viewed as the most basal animals with complex, organ-like multicellular structures dedicated to sensory perception. However, sponges also a surprising range of genes required for and neural functions in Bilateria. Here, we: (1) discuss "sense organ" regulatory genes, including; sine oculis, Brain 3, eyes absent, that are expressed cnidarian sense organs; (2) assess features planula, polyp, medusa life-history stages Cnidaria; (3) physiological molecular data...
SUMMARY Whether the serial features found in some molluscs are ancestral or derived is considered controversial. Here, situ hybridization and antibody studies show iterated engrailed ‐gene expression transverse rows of ectodermal cells bounding plate field development spicule formation chiton, Lepidochitona caverna , as well surrounding valves early shell hinge clam, Transennella tantilla. Ectodermal associated with skeletogenesis across a range bilaterian phyla, suggesting single...
This study assesses swimming potential in a variety of ammonoid shell shapes on the basis coefficients drag (Cd) and power needed to maintain constant velocity. Reynolds numbers (Re) relevant ammonoids, lower than those previously studied, were examined. Power consumption was scaled range sizes velocities. Estimates available derived from studies oxygen modern cephalopods fish used calculate maximum sustainable velocities (MSV). Laterally compressed, small thickness ratio (t. r.) assumed be...
We examined the development of nervous system in rhopalium, a medusa-specific sensory structure, Aurelia sp.1 (Cnidaria, Scyphozoa) using confocal microscopy. The rhopalial appears primarily ectodermal and contains neurons immunoreactive to antibodies against tyrosinated tubulin, taurine, GLWamide, FMRFamide. develops an ordered manner: presumptive gravity-sensing organ, consisting lithocyst touch plate, differentiates first; "marginal center," which controls swimming activity, second;...