The physical characteristics and distributions in space and time of salinity, temperature and phytoplankton in Ladysmith
Harbour are described. It is shown that water exchange
in Inner Ladysmith Harbour is the result of horizontal mixing
and a two-layered circulation. The mean rate of water renewal in the Inner Harbour is calculated to be 32.2. percent of
the mean volume per day. It is shown that four blooms of
phytoplankton may occur in Ladysmith Harbour during the growing
season, each having characteristic distributions. The
distributions of phytoplankton during the first three blooms
are discussed in relation to the physical characteristics and
processes in and near Ladysmith Harbour. It is stated that
the generic composition of the phytoplankton in Ladysmith
Harbour varies in time and space. The rate of water exchange
is shown to be such that endemic species of diatoms may develop
in the Inner Harbour and that under certain conditions apparent
endemism may occur. It is shown that both population succession and local sequence may be responsible for changes in the
generic composition of the phytoplankton with time. Using the
mean rate of water exchange and the assumption that renewal of
water results entirely from the two-layer circulation, the
net rates of advection of phytoplankton into Inner Ladysmith Harbour are
calculated. It is shown that variations in the standing crop appear to be more closely related to changes in the rate
of advection of phytoplankton than to changes in the rate of
removal of cells by zooplankton. The rate of recruitment of
phytoplankton by growth is calculated. It is computed that
recruitment of cells by advection exceeds the recruitment by
growth in Inner ladysmith Harbour. / Science, Faculty of / Zoology, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/41664 |
| Date | January 1956 |
| Creators | McAllister, Carey Douglas |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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