Across all types of realms and habitat types, the number of individuals and the total amount of biomass are almost inevitably dominated by one or few species, whereas most species are rare. However, the proportion of numbers or of biomass made up by the most dominant species differs strongly even in closely related assemblages or spatially adjacent communities (Figure 1). Published dominance ratios range from 0.2 to almost 1 for abundance as well as biomass. The proportion contributed by the three most dominant species consistently exceeds 50% and very often 75%. The degree of dominance differs highly with the exact way dominance is measured, but also across spatial and temporal gradients. In order to understand the mechanisms driving dominance within communities and in regional scales, it is important to identify some of this variation in dominance ratios.
Was this article helpful?
This book will surely change your life due to the fact that after reading this book and following through with the steps that are laid out for you in a clear and concise form you will be earning as much as several thousand extra dollars a month, as you can see by the cover of the book we will be discussing how you can make cash for what is considered trash by many people, these are items that have value to many people that can be sold and help people who need these items most.