The organisms which occur primarily or most abundantly in this zone are known as Edge species. Density of birds is greater in the ecotone between the forest and the desert.

TLS Online TPP Program

#Id: 8810

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 8811

#Unit 6. System Physiology – Plant

first and second excited singlet states in chlorophyll for a molecule that has two major absorption bands in blue and red.

TLS Online TPP Program

#Id: 8812

#Unit 6. System Physiology – Plant

Excitation of chlorophyll RC has four ways to dissipate energy

1. Heat

2. Fluorescence

3. energy transfer

4. Photochemistry via charge separation

TLS Online TPP Program

#Id: 8815

#Unit 6. System Physiology – Plant

fluorescence occurs in nanoseconds (ns, 10–9 s); however, photochemistry in photosynthetic organisms occurs more rapidly, in picoseconds (ps, 10–12 s). Thus, when the 1,000‐fold more rapid pathway of photochemistry is available, little fluorescence is observed and photosynthesis proceeds with high efficiency. 

TLS Online TPP Program

#Id: 8820

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 8821

#Unit 6. System Physiology – Plant