Nanaimo River Estuary Restoration: An Assessment of Berm Removal on Benthic Macroinvertebrates in Tidal Channels

Date created: 
2016-04-16
Identifier: 
etd20855
Keywords: 
Tidal channel
Benthic macroinvertebrate
Sediment
Detritus
Berm
Estuary restoration
Abstract: 

Macroinvertebrates in two berm-impacted tidal channels (Site A and Site B) were compared to a natural channel (Site C) to determine short-term response to berm removal restoration using a BACI study design. Multivariate analysis indicates that the benthic community composition shifted from before berm removal to after berm removal conditions but not in a predictable organized way. Total abundance was highest at Site A in both conditions (before and after berm-removal). Invertebrate diversity was similar and low among sites. Biomass was highest at Site C. Organic matter percentage was highest at Site C in both conditions and it appeared to increase in Site A and Site B after berm removal. Silt & Clay (>0.0063mm) were statistically different in Site C compared to Site A and Site B although very fine sand was the highest in percentage among sites and in both conditions. Berms affect channel and benthic invertebrate dynamics; time and more research are needed to fully restore the Nanaimo estuary.

Document type: 
Graduating extended essay / Research project
Rights: 
This thesis may be printed or downloaded for non-commercial research and scholarly purposes. Copyright remains with the author.
Senior supervisor: 
Ruth Joy
Department: 
Environment: Ecological Restoration
Thesis type: 
(Project) M.Sc.
Statistics: