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

Date created
2016-04-16
Authors/Contributors
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
Identifier
etd20855
Copyright statement
Copyright is held by the author.
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Scholarly level
Member of collection
Attachment Size
etd20855.pdf 4.61 MB