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Table 5 Estimations of regional species richness using an extrapolation of an MMF model (y = (ab + cxd)/(b + xd) of a plot of species accumulation per number of individuals at near asymptote at 108 individuals. The r is a measure of the 'fit' of the model to the data.

From: Biodiversity of nematode assemblages from the region of the Clarion-Clipperton Fracture Zone, an area of commercial mining interest

Data Sigmoidal Growth Model Parameters r Estimated Species Richness
All Samples a = -12.1378 b = 154.4177 c = 360.9705 d = 0.7323 0.99999 361
Southern Samples (O°N, 2°N & 5°N) a = -16.7132 b = 109.1754 c = 385.8644 d = 0.6642 0.99997 386
Northern Samples (9°N & 23°N) a = 12.6610 b = 485.3579 c = 158.5034 d = 1.0503 0.99996 159