Does Botanical Diversity in Sewage Treatment Reed-Bed Sites Enhance Invertebrate Biodiversity?

Table 2

Example of species value and biomass ranking applied to part of the coleoptera sample data. Calculation of species value and biomass ranking was completed for all invertebrate species collected, of which a sample of the Coleoptera is shown here. This data was then used to ascertain the diversity of the reed-bed sites.

Order	Taxon	Total no. rec.	Total UK 10 km grid squares∗	Total UK ranking value	Biomass (length in mm)
Coleoptera	Pterostichus niger	14	930	3	17.5
	Pterostichus nigrita	19	40	10	12.5
	Pterostichus strenuus	10	994	3	6.0
	Pterostichus vernalis	2	457	4	6.8
	Stenolophus mixtus	1	257	4	5.3
	Altica lythri	8	79	5	5.0
	Aphthona euphorbiae	2	98	5	4.0
	Chaetocnema hortensis	11	35	10	1.9

∗Source data NBN Gateway, correct as of 30/03/07.