Describe a typical geographic range of species (in terms of density of individuals) that generally results from the interaction of various limiting factors
Herbivores will have to eat a large variety of plants due to the low amounts of nutrients in grass. Because of this, they have a much smaller range due to the trophic level biomass. Since they are lower in the trophic level, they need much less under them to support them.
Carnivores, if ectothermic, will have to make sure their environment is suitable for decomp of what they are eating. If they are endothermic, they will have a much larger range than ecto. Ecto will still have a larger range than a herbivore though. They have the much larger range due to the trophic level biomass and since they are much higher up in the trophic pyramid they have much more under them to support them.
A good example of an animal that has wide distribution becuase of low-limiting factors are us humans. Not only are we eurythermic (able to withstand large temp variety), but we are also capable of being euryphagous (able to eat a wide variety). Beause of this, we have a large distribution. On the other hand, many species of Eucalypts, which are endemic
to Australia, will have many more limitations, causing a much smaller distribution.
- an animal may be physiologically able to live in all areas
- how many limiting factors will decide where it lives though
- your realized niche is a subset of your physiological niche
- numerous factors that actually change over time will decide where a species lives