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Sea-level fluctuations during the last glacial cycle
A hydraulic model of the water exchange between the Red Sea and the world ocean is used to derive the sill depth—and hence global sea level—over the past 470,000 years, finding that sea-level changes of up to 35 m occurred, coincident with abrupt changes in climate.
The unholy trinity: taxonomy, species delimitation and DNA barcoding
A phylogenetic systematic framework for an improved barcoder as well as a taxonomic framework for interweaving classical taxonomy with the goals of ‘DNA barcoding’ are presented.
Recent Advances in Our Knowledge of the Myxozoa
It is indicated that the Myxozoa are closely related to Cnidaria, and marine taxa at the genus level branch separately from genera that usually infect freshwater fishes; taxa cluster more by development and tissue location than by spore morphology.
Antarctic temperature and global sea level closely coupled over the past five glacial cycles
Sea level has varied by over one hundred metres across glacial–interglacial cycles over the past 520,000 years. An extended sea-level reconstruction shows a strong coupling between these sea-level
Climate change and trace gases
Only intense simultaneous efforts to slow CO2 emissions and reduce non-CO2 forcings can keep climate within or near the range of the past million years.
Atmospheric Carbon Dioxide Concentration Across the Mid-Pleistocene Transition
A 2.1-million-year record of sea surface partial pressure of CO2 (Pco2), based on boron isotopes in planktic foraminifer shells, suggests that the atmospheric partial pressure (pco2) was relatively stable before the mid-Pleistocene climate transition, which is consistent with a close linkage between atmospheric CO2 concentration and global climate.
Marine isotope stage 3 sea level fluctuations: Data synthesis and new outlook
To develop a better understanding of the abrupt Dansgaard‐Oeschger mode of climate change, it is essential that we establish whether the ice sheets are actively involved, as trigger or amplifier, or
A molecular phylogeny of annelids
Parsimony analyses of annelids based on the largest taxon sample and most extensive molecular data set yet assembled suggest that the poor resolution in the basal parts of the trees presented here may be due to lack of signal connected to incomplete data sets, rapid radiation events and/or uneven evolutionary rates and long‐branch attraction.
Success of Parsimony in the Four‐Taxon Case: Long‐Branch Repulsion by Likelihood in the Farris Zone
The accuracy of phylogenetic methods is reinvestigated for the four‐taxon case with a two‐ edge rate and a three‐edge rate and maximum likelihood methods are shown to be particularly prone to failure when closely related taxa have long branches.