Keyphrases
Atmospheric CO2 Concentration
33%
C4 Grasses
100%
C4 Plants
100%
Carbon Isotopes
33%
Early Oligocene
100%
Geological Record
33%
Grass
66%
Grass Pollen
66%
Isotopic Evidence
100%
Middle Miocene
100%
Partial Pressure of CO2 (pCO2)
33%
Photorespiration
33%
Pollen Grains
66%
Shallow Marine Sediments
33%
Southwestern Europe
100%
Temperate Region
33%
Total Abundance
33%
Tropical-temperate Comparison
33%
Warm Temperate
33%
Water Use Efficiency
33%
Earth and Planetary Sciences
Atmospherics
25%
C4 Plant
75%
Carbon Dioxide
25%
Europe
100%
Geological Record
25%
Isotopic Composition
25%
Marine Sediment
25%
Miocene
100%
Oligocene
100%
Temperate Region
25%
Water Use Efficiency
25%
Agricultural and Biological Sciences
C4 Plant
75%
Carbon Dioxide
25%
Photorespiration
25%
Poaceae
100%
Water Use Efficiency
25%