. Practical botany. Botany. 500 PEACTICAL BOTANY 453. Competition and emigration. A little has already been said (Sect. 137) about the severe competition among plants, which often allows only one seed among many thousands to grow into a new plant. This competition frequently tends to cause plants to flourish better in new territory. Other white pines would find it almost impossible to grow up from the seed under adult trees like those of Fig. 321, but seeds blown. Fig. 373. A wooded river bank invaded by a moving sand dune In the foreground a young Cottonwood is being covered by sand into neig
. Practical botany. Botany. 500 PEACTICAL BOTANY 453. Competition and emigration. A little has already been said (Sect. 137) about the severe competition among plants, which often allows only one seed among many thousands to grow into a new plant. This competition frequently tends to cause plants to flourish better in new territory. Other white pines would find it almost impossible to grow up from the seed under adult trees like those of Fig. 321, but seeds blown. Fig. 373. A wooded river bank invaded by a moving sand dune In the foreground a young Cottonwood is being covered by sand into neighboring clearings (Fig. 322) or among young birches or other deciduous trees (Fig. 323) may promptly begin their growth into forest trees. In this way there is a constant inva- sion of neighboring species into any territory not already occu- pied by those species or by others which they cannot crowd out of the way. A newly formed island in a river (Fig. 372), the recently drained bed of a lake or a bayou, is promptly populated by the plants which crowd in from adjacent terri- tory. The newcomers may arrive as seeds, or as Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917; Caldwell, Otis William, 1869- joint author. Boston, New York [etc. ] Ginn and company
Size: 1848px × 1352px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectbotany
