Resources – Air and water

Physical conditions

• Thermal• Water & osmotic• pH• Toxins• Radiation

Resources

• Food or light (energy)• Nutrients• Water• Space• Oxygen• Carbon dioxide

Essential elements

• All: C,H,K,N,S,Ca,Fe,Mg -- Mn,Zn,Cu • Plants: B,Si,Co(legumes)• Animals: Cl,Na,Cr,Se

Classification of resources

Photosynthesis and temperature

Photosynthesis and light level

Light reactions of photosynthesis

Ecological significance of C4 & CAM photosynthesis

• Temperature and water response

• Community structure and niche differences

• Soil fertility

• Atmospheric CO2

• Herbivory

• Epiphytes

• Aquatics