*Learn key terms and descriptions Biology - Ecosystem* *Term* : Energy Pyramids *Description* : Developed by Charles Elton in 1927. Pyramids are an expression of the relationship between organisms at different trophic levels in terms of their number, biomass or energy. Three types of pyramids: 1. Pyramid of Number, 2. Pyramid of Biomass, 3.Pyramid of energy *Term* : Energy Flow *Description* : SUN- Main Source of energy ► 50% of incident light is PHOTOSYNTHETICALLY ACTIVE RADIATION (PAR) ► 2- 10 % of PAR is captured by plants. ► Only a small fraction of this (stored as organic compounds) is transferred to consumers; the rest is used up in respiration and other life-supporting activities of the plants. ► As energy is transferred as food, most part is lost as heat at each stage (10% LAW) *Learn more flash cards Download👇Tutor LPT App & Keep Learning* https://play.google.com/store/apps/details?id=com.tc.lpt - Android https://apps.apple.com/in/app/tutor-lpt/id6448413564 - IOS https://tutorlpt.com/ - Web