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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.
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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
Ecological significance of C4 & CAM photosynthesis • Temperature and water response • Community structure and niche differences • Soil fertility • Atmospheric CO2 • Herbivory • Epiphytes • Aquatics