7- Energy Relations

solar radiation

organic molecules

inorganic molecules

three main sources of energy

energy

capacity of a system to perform work

autotrophs

inorganic source of carbon and energy

photosynthetic

uses carbon dioxide as source of carbon and solar radiation as source of energy

chemosynthetic

uses inorganic molecules as source of carbon and energy

heterotrophs

organic source of carbon and energy

Detritivores

rganisms that feed on nonliving organic matter (eg
leaf litter, feces, carcasses)

senesces

90% of primary production is not consumed by herbivores – it
_____________

1. excreted

2. egested

3. respired

most of what herbivores eat is not digested, it is (3)

foods that are nutritionally rich and similar to
their body composition

carnivores consume

1. heterotrophs

2. photosynthetic

3. OR chemosynthetic

in terms of energy, prokaryotes can be

1. animals

2. fungi

examples of heterotrophs [2]

photosynthetically active radiation (PAR)

visible light that fuels photosynthesis

Growth is determined by the resource that is in shorted supply

Liebig’s law of the minimum:

LCP: light compensation point

point on photosynthetic response curve where photosynthesis = respiration

Isat

part of photosynthetic response curve. light intensity at which photosynthetic system is saturated

increases until it levels at a maximum rate

as photosynthetic flux density increases, the rate of photosynthesis…