# of species vs body mass

Discussion of the distribution and abundance of living organisms and how these properties are affected by interactions between the organisms and their environment

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# of species vs body mass

Post by farful » Tue Sep 15, 2009 9:55 pm

Here are some graphs:

http://en.wikipedia.org/wiki/File:Inter ... ammals.png
http://en.wikipedia.org/wiki/File:North ... _graph.png

It's obvious why the number of species that have smaller body sizes are greater in number.
However, once we get into organisms with mass smaller than 100g, it seems to decrease. Why? One would assune it'd keep increasing, no?
Furthermore, would the trend continue for microbials?

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