21. Overgrazing may cause erosion, habitat destruction, soil compaction, or reduced biodiversity ( species richness ). 22. The islands were fumigated to clear the arthropod populations in order to study species richness . 23. Within this taxon, the Gastropoda have reached their peak in species richness and ecological diversity. 24. Twelve studies have found a higher population and species richness of carabids on organic systems. 25. They are native to western and central Africa, with the greatest species richness in Cameroon. 26. It was discovered that plant species richness in Norwegian meadows is correlated with habitat diversity. 27. Rio Negro has a very high species richness . 28. The studies show that species richness does matter, 29. For example, there is not necessarily a clear or consistent relationship between productivity and species richness . 30. In fact, species richness is greatest along the highest elevations of the montane rainforests of Luzon.
