| Charles Clement Coe - 1895 - 648 pages
...displacing the English watercress from the rivers of New Zealand by a very simple and intelligible process. "The roots of these trees penetrate the bed of the...requisite amount of nourishment, gradually disappears."* In these cases there is no abstract survival of the fittest: both are equally fit apart from one another.... | |
| Alfred Russel Wallace - 1901 - 542 pages
...and necessitating great outlay to keep the stream open. But a natural remedy has now been found in planting willows on the banks. The roots of these...requisite amount of nourishment, gradually disappears. Increase of Organisms in a Geometrical Ratio. The facts which have now been adduced, sufficiently prove... | |
| Alfred Russel Wallace - 1889 - 523 pages
...and necessitating great outlay to keep the stream open. But a natural remedy has now been found in planting willows on the banks. The roots of these...requisite amount of nourishment, gradually disappears. Increase of Organisms in a Geometrical Eatio. The facts which have now been adduced, sufficiently prove... | |
| George Malcolm Thomson (M.L.C., F.L.S., F.N.Z.Inst.) - 1922 - 626 pages
...(Fl., Oct. to March.) 1 Kirk reported Matthiola sinuata, Br. as growing at Castle Rock in 1887. TNZ 24 It is frequently found to be very much infested...it; and I have noticed in some parts of the Avon at Christchurch, and in tributary streams, that a species of Nitella can strangle both of them. But watching... | |
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