 | Charles Darwin - 1861 - Страниц: 470
...the other species will decrease, When we travel southward and see a species decreasing in numbers, we may feel sure that the cause lies quite as much in other species being favoured, as in this one being hurt. So it is when we travel northward, but in a somewhat lesser degree,... | |
 | Charles Darwin - 1864 - Страниц: 472
...the other species will decrease. When -we travel southward and see a species decreasing in numbers, we may feel sure that the cause lies quite as much in other species being favoured, as in this one being hurt. So it is when we travel northward, but in a somewhat lesser degree,... | |
 | Charles Darwin - 1873 - Страниц: 492
...decreasing in numbers, we may feel sure that the cause lies quite as much in other species being favoured, as in this one being hurt. So it is when we travel...competitors, decreases northwards ; hence in going northwards, or in ascending a mountain, we far oftener meet with stunted forms, due to the directly... | |
 | Charles Darwin - 1875 - Страниц: 504
...decreasing in numbers, we may feel sure that the cause lies quite as much in other species being favoured, as in this one being hurt. So it is when we travel...competitors, decreases northwards ; hence in going northwards, or in ascending a mountain, we far oftener meet with stunted forms, due to the directly... | |
 | Asa Gray - 1878 - Страниц: 416
...the other species will decrease. "When we travel southward and see a species decreasing in numhers, we may feel sure that the cause lies quite as much...northward, but in a somewhat lesser degree, for the number 01 species of all kinds, and therefore of competitors, decreases northward; hence, in going northward,... | |
 | Asa Gray - 1877 - Страниц: 418
...the other species will decrease. When we travel southward and see a species decreasing in numbers, wo may feel sure that the cause lies quite as much in...northward, but in a somewhat lesser degree, for the number or species of all kinds, and therefore of competitors, decreases northward; hence, in going northward,... | |
 | T Warren O'Neill - 1880 - Страниц: 482
...the othe* species will decrease. When we travel southwards and see a species decreasing in numbers, we may feel sure that the cause lies quite as much...all kinds, and therefore of competitors, decreases northward; hence, in going northward, or in ascending a mountain, we far oftener meet with stunted... | |
 | Charles Darwin - 1884 - Страниц: 396
...the other species must decrease. When we travel southward and see a species decreasing in numbers, we may feel sure that the cause lies quite as much...all kinds, and therefore of competitors, decreases northward ; hence, in going northward, or in ascending a mountain, we far oftener meet with stunted... | |
 | 1886 - Страниц: 548
...the other species must decrease. When we travel southward and see a species decreasing in numbers, we may feel sure that the cause lies quite as much...all kinds, and therefore of competitors, decreases northward ; hence, in going northward or in ascending a mountain, we far oftener meet with stunted... | |
 | Henry Coppée - 1893 - Страниц: 560
...the other species must decrease. When we travel southward and see a species decreasing in numbers, we may feel sure that the cause lies quite as much...but in a somewhat lesser degree, for the number of specie« of all kinds, and therefore of competitors, decreases northward ; hence, in going northward... | |
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When we travel southward and see a species decreasing in numbers, we may feel sure that the cause lies quite as much in other species being favored as in this one being hurt. 
