Blog Post #7: Theoretical Perspectives

I have stated it in previous posts that my research on species richness is based around the High-Productivity Hypothesis.  The logic behind the hypothesis is that an increase in productivity allows for greater populations, which leads to greater competition and subsequently speciation through niche differentiation.  There is strong evidence of this pattern on a global scale, for example, the high amount of species in the productive tropics versus the low number of species in the comparatively less productive arctic.  On smaller scales, the evidence is much weaker, and I hope to find through my research that tree species richness in the Very Dry Maritime Coastal Western Hemlock biogeoclimatic subzone has a positive relationship with site productivity, which in turn supports the High-Productivity Hypothesis.

KEYWORDS: Species richness, Very Dry Maritime Coastal Western Hemlock Subzone, Site Productivity

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