Lecture 1-4 Flashcards
Def: Ecology
The study of the abundance and distrubution of organisms and the abiotic and biotic interactions that determine them
Ecosystem functioning is described by
Productivity
Productivity
Rate of increase of biomass
Realm of ecology
individual organisms- the biosphere
After damage ecosystems go through
succession
Phenotypic plasticity
allows acclimatization of a genotype to stress
Resistance stability
ability of an ecosystem to resist disturbance and maintain its service
Resilience stability
ability of an ecosystem to recover
Eoclogical energetics
the study of fixation transfer, and storage of energy by ecosystem components
Photosynthsis
CO2+H2O-y->CH2O+O2 y=light
Chlorophyl
Greem
Cartotenoids
Orange
Xanthophylls
Yellow
Anthocyanins
Red
Absorbed energy is dissipated by - reradiation of
longer wave infrared energy
Second law of thermodynamics
Life requires incessant input of energy
energy is required to create order
Rubisco
Catalyses the fixation of CO2 in photosynthesis (most abundant protien on earth and slowest)
Gross primary production
Total amount of energy fixed (part is used by their matabolism)
Net primary production
GPP- metabolism Measured in accumulation of biomass
Standing crop
Accumulated production of ecosystems expressed as dry mass per area
Food chain is
linear respresntation of feeding
Herbivors Assimilate
10% of energy of their food
Carnivores assimilate
20% of energy of their food
Food web is a representation of all
feeding interactions. It expresses connections amound the food chains in the ecosystem
