Pyramids Numbers Biomass Productivity Pyramid of Numbers n
Pyramids Numbers, Biomass, & Productivity
Pyramid of Numbers n n The information collected for each trophic level is the total number of organisms in the area. Problem is each organism is counted equally. n n 1000 kg tree = 1 gram grass plant Units = organisms
Pyramid of Biomass n n Takes the weight or mass of all organisms in the area Can have the same problem as pyramid of numbers n n Both are a measure in one instant of time Unit = grams
Pyramid of Productivity n n n Designed to eliminate the inverted pyramid It measures energy per area per time. Unit = joules
Pass it on n Trophic Levels and Biomagnification
Trophic Levels n n 10% of the matter consumed by an organism is passed on in the form of body weight 90% is lost as heat energy used to support body function
n n The same ratio occurs in toxin found in food sources Predators consume non-biodegradable toxins with their prey incorporating it into their own body.
But… n n n Since the body does not know how to recognize the toxin, the amount of toxin in the body is magnified by 10%. This is biomagnification Example n Producer (0. 01%) Primary Consumer (0. 1%) Secondary Consumer (1%) Tertiary Consumer (10%)
Biome Characterization and Distribution n n A large area of land or a group of ecosystems that have similar climatic conditions Considering temperature - Classified by latitude or distance form the equator Considering moisture – classified by distance from the ocean Can be modified by abiotic factors
Wind patterns n If wind pattern in on-land, the shore climate id very wet
Ocean Currents n n Warm and cold currents can affect coastal temperature Ex – Europe under influence of a warm current
Mountain Ranges n Can increase the amount of precipitation on the windward side and decrease it on the lee-ward side
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