P. Koch

Publications204
h-index64
Citations15,384
Highly Influential Citations1,199
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ISOTOPIC RECONSTRUCTION OF PAST CONTINENTAL ENVIRONMENTS
▪ Abstract Vertebrate fossils and continental sediments provide a rich record of variations in the isotopic composition of surface environments. To interpret these records, a greater understanding of…
The Effects of Sample Treatment and Diagenesis on the Isotopic Integrity of Carbonate in Biogenic Hydroxylapatite
The study of the isotopic composition of structural carbonate in fossil vertebrate hydroxylapatite has been hampered by uncertainty concerning sample treatment and arguments about the susceptibility…
Global patterns in leaf 13C discrimination and implications for studies of past and future climate
TLDR
A 4.6‰ decline in the δ13C of atmospheric CO2 is estimated at the onset of the Paleocene-Eocene Thermal Maximum, an abrupt global warming event ∼55.8 Ma, leading to better constraints on past greenhouse-gas perturbations.
Late Quaternary Extinctions: State of the Debate
Between fifty and ten thousand years ago, most large mammals became extinct everywhere except Africa. Slow-breeding animals also were hard hit, regardless of size. This unusual extinction of large…
Correlation between isotope records in marine and continental carbon reservoirs near the Palaeocene/Eocene boundary
CHANGES in the isotope content of the large marine carbon reservoir can force shifts in that of the smaller carbon pools in the atmosphere and on land. The carbon isotope compositions of marine…
Assessing the Causes of Late Pleistocene Extinctions on the Continents
TLDR
Evidence now supports the idea that humans contributed to extinction on some continents, but human hunting was not solely responsible for the pattern of extinction everywhere, and suggests that the intersection of human impacts with pronounced climatic change drove the precise timing and geography of extinction in the Northern Hemisphere.
Using stable isotope biogeochemistry to study marine mammal ecology
TLDR
This review supplies a complete list of published SIA contributions to marine mammal science and highlights informative case examples in four general research areas: physiology and fractionation, foraging ecology and habitat use, ecotoxicology, and historic ecology and paleoecology.
Using Isoscapes to Trace the Movements and Foraging Behavior of Top Predators in Oceanic Ecosystems
The stable isotope composition of animal tissues can provide intrinsic tags to study the foraging and migratory ecology of predators in the open ocean. Chapter 13 (this volume) demonstrated that by…
Oxygen isotope partitioning between phosphate and carbonate in mammalian apatite
Abstract The oxygen isotope compositions of phosphate and structural carbonate in mammalian enamel and bone apatite are linked to that of body water at constant body temperature near 37°C, but the…
A humid climate state during the Palaeocene/Eocene thermal maximum
TLDR
The authors' results provide evidence for a previously unrecognized discrete shift in the state of the climate system during the PETM, characterized by large increases in mid-latitude tropospheric humidity and enhanced cycling of carbon through terrestrial ecosystems.
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