-The dry mass of an organism is called its biomass. Biomass is the amount of biological material. The total biomass at a particular step in a food chain is always less than the total biomass at the step before it. Let's look again at the food chain:
grass → vole → barn owl The biomass of all the grass plants is the greatest in the chain, and the biomass of all the barn owls is the least. We can show information like this using a pyramid of biomass.If we looked at the more complex food chain (ie the oak tree to sparrow hawk), we could see that the large biomass of the oak tree is bigger than the small biomass of the sparrow hawk, at the other end of the chain.
-Animals and plants compete for different things in their habitats because if they don't get what they need from their homes they'll die. Here are what they both compete for:
Animals: Plants:
Food; Water; Space; Mates Light; Water; Space; Mineral Salts.
-With population counts, there is a continuous tussle between predator and prey. For example, if the predators numbers increased, the preys numbers would decrease. However this would then lead to the predators number declining as there would not be enough food eventually. This would then mean the preys numbers would go up and the cycle would begin again. This is very clear when comparing the predator/prey relationship with the Canadian Lynx (Predator) and the Snowshoe Hare (Prey).
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