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On the Nature of Rivers - With case stories of Nile, Zaire and Amazon (Hardcover)
Loot Price: R1,439
Discovery Miles 14 390
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On the Nature of Rivers - With case stories of Nile, Zaire and Amazon (Hardcover)
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Origin and Aims of this essay It was not by choice but by the
misfortunes or fortunes of the last war, that I became involved
with rivers. In December 1946 I obtained a lecturing post at the
then Gordon Memorial College at Khartoum and the Principal of the
college brought me to confluence of the two Niles and urged me to
'do something' on the biology of the river. I was very reluctant,
my experience was limited to lakes in Poland up to 1939, and I did
not know anything about work on rivers. The 'equipment' was a
rowing boat, hired, and a 'home made' plankton net. This limited
our first exploratory steps to the immediate vicinity of Khartoum.
In both the White and Blue Nile we discovered the presence of a
pure plankton. This was contrary to opinions expressed in the
limited scientific literature available at Khartoum which
stimulated our doubts and the search for the origin of this
phenomenon. And so, early in our work, we became aware of the
longitudinal sequence of events in running water, a fundamental
feature of river ecology. of work were daunting; In the Nile, as in
other long rivers, the difficulties the water courses stretch for
thousands of kilometers south and north of our base, our work had
to be done in time free from lecturing duties, no research grants
were available.
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