. Research methods in ecology. Plant ecology. CLASSIFICATION AND RELATIONSHIP 301 351. Habitat classification. In arranging formations with reference to habitats, the direct factors, water and light, can alone be used to advantage. Such a system is fundamental, because it is founded upon similarity of hab- itat and of structure. Proposed groupings based upon nutrition-content, or upon the division of factors' into climatic and edaphic, have elsewhere^ been shown to be altogether of secondary importance, if not actually erroneous. The basis of the habitat grouping is water-content, which is sup
. Research methods in ecology. Plant ecology. CLASSIFICATION AND RELATIONSHIP 301 351. Habitat classification. In arranging formations with reference to habitats, the direct factors, water and light, can alone be used to advantage. Such a system is fundamental, because it is founded upon similarity of hab- itat and of structure. Proposed groupings based upon nutrition-content, or upon the division of factors' into climatic and edaphic, have elsewhere^ been shown to be altogether of secondary importance, if not actually erroneous. The basis of the habitat grouping is water-content, which is supplemented by light whenever the factor is decisive. The primary divisions thus ob- tained are water, forest, grassland, and desert, which are characterized re-. Fig. 81. Pachylophon (Pachylophus caespitosus), a family of the gravel slide formation. spectively by associations of hydrophytes, mesophytes, hylophytes, poophytes, and -xerophytes respectively. Within these, formations are arranged ac- cording to the type of habitat, i. e., pond, meadow, forest, dune, etc. These divisions comprise all formations which belong to the type by virtue of their physiognomy and structure. Such formations differ from each other very considerably or completely in the matter of floristic, i. e., component species, but they still belong to the same type. A dune formation in the interior and one on the coast may not have a single species in common, and yet they are essentially alike in habitat, development, and structure. 'Clements, F. E. The Development and Structure of Vegetation, 24, 27. 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 Clements, Frederic E. (Frederic Edward), 1874-1945. Lincoln, Neb. , University Pub. Co.
Size: 1827px × 1368px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectplantec, bookyear1905
