Vegetation classification is the process of classifying and mapping the vegetation over an area of the Earth's surface. Vegetation classification is often performed by state based agencies as part of land use, resource and environmental management. Many different methods of vegetation classification have been used. In general, there has been a shift from structural classification used by forestry for the mapping of timber resources, to floristic community mapping for biodiversity management. Whereas older forestry-based schemes considered factors such as height, species and density of the woody canopy, floristic community mapping shifts the emphasis onto ecological factors such as climate, soil type and floristic associations. Classification mapping is usually now done using geographic information systems (GIS) software.
A. The soil (in the widest sense) is very wet, and the abundant water is available to the plant (at least in Class 1), the formations are therefore more or less hydrophilous:
Class 1. Hydrophytes (of formations in water).
Class 2. Helophytes (of formations in marsh).
B. The soil is physiologically dry, i. e. contains water which is available to the plant only to a slight extent; the formations are therefore essentially composed of xerophilous species:
Class 3. Oxylophytes (of formations on sour (acid) soil).
Class 4. Psychrophytes (of formations on cold soil).
Class 5. Halophytes (of formations on saline soil).
C. The soil is physically dry, and its slight power of retaining water determines the vegetation, the climate being of secondary import; the formations are therefore likewise xerophilous:
Class 6. Lithophytes (of formations on rocks).
Class 7. Psammophytes (of formations on sand and gravel).
Class 8. Chersophytes (of formations on waste land).
D. The climate is very dry and decides the character of the vegetation; the properties of the soil are dominated by climate; the formations are also xerophilous:
Class 9. Eremophytes (of formations on desert and steppe).
Class 10. Psilophytes (of formations on savannah).
Class 11. Sclerophyllous formations (bush and forest).
E. The soil is physically or physically dry:
Class 12. Coniferous formations (forest).
F. Soil and climate favour the development of mesophilous formations:
Class 13. Mesophytes.
Warming's types of formations:
1. Microphyte-formation
2. Moss-formation
3. Herb-formation
4. Dwarf-shrub formations and undershrub-formations
A vegetation classification with six main criteria ("hierarchical attributes", with exemplified categories applicable mainly to Neotropical region):[8][9]
In the sixties, A. W. Kuchler coordinated an extensive review of vegetation maps from all the continents, compiling the terminology used for the types of vegetation.[23]
The Braun-Blanquet method focuses on the composition of plant species within a community. It examines which species grow together, looking at patterns and differences in species groups across different areas. This method uses data collected from specific plots to compare the plant communities and understand how these patterns are influenced by environmental factors.[24]
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^Warming, E. (1895). Plantesamfund - Grundtræk af den økologiske Plantegeografi. P.G. Philipsens Forlag, Kjøbenhavn. 335 pp.
^Warming, E. (1909). Oecology of Plants. An introduction to the study of plant-communities, translated by P. Groom and I. B. Balfour. Clarendon Press, Oxford. 422 pp. BHL.
^Schimper, A. F. W. 1898. Pflanzen-Geographie auf physiologischer Grundlage. Fisher, Jena. 876 pp. English translation, 1903, [3].
^Beard J.S. (1978). The Physiognomic Approach. In: R. H. Whittaker (editor). Classification of Plant Communities, pp 33-64, [4].
^Ellenberg, H. & D. Mueller-Dombois. 1967. Tentative physiognomic-ecological classification of plant formations of the Earth [based on a discussion draft of the UNESCO working group on vegetation classification and mapping.] Berichte des Geobotanischen Institutes der Eidg. Techn. Hochschule, Stiftung Rübel, Zürich 37 (1965-1966): 21—55, [5].
^Oliveira-Filho, A. T. 2009. Classificação das Fitofisionomias da América do Sul extra-Andina: Proposta de um novo sistema – prático e flexível – ou uma injeção a mais de caos?. Rodriguésia 60 (2): 237-258, [6].
^Oliveira-Filho, A.T. 2015. Um sistema de classificação fisionômico-ecológica da vegetação Neotropical: segunda aproximação. In: Felfili, J.M.; Eisenlohr, P.V.; Melo, M.M.R.F. Andrade, L.A.; Meira Neto J.A.A. (Eds.). Fitossociologia no Brasil: Métodos e estudos de casos, vol. 2, Editora UFV, Viçosa, cap. 19, p. 452, [7].
^Grisebach, A. (1872). Die Vegetation der Erde nach ihrer klimatischen Anordnung. Ein Abriß der Vergleichenden Geographie der Pflanzen. 1st ed. Leipzig: W. Engelmann., 2 vol. Band I: xii + 603 p., [8]; Band II: x + 635 p., [9]. 2nd ed. 1884.
^Tansley, A. G. & Chipp, T. F. (1926). Aims and Methods in the Study of Vegetation. The British Empire Vegetation Committee, Whitefriars Press, London. 383 pp.
^Rübel, E. F. 1930. Pflanzengesellschaften der Erde. Bern: Verlag Hans Huber. 464 pp.
^Burtt-Davy, J. (1938). The classification of tropical woody vegetation types. Oxford: University of Oxford, Imperial Forestry Institute. 85 p. (Institute paper, n. 13).
^Beard, J. S. (1944). Climax vegetation in tropical America. Ecology 25: 127-158.
^Beard, J. S. (1955). The classification of tropical American vegetation-types. Ecology 36: 89-100.
^Aubréville, A. (1956). Essai de classification et de nomenclature des formations forestières africaines avec extension du système propose à toutes les formations du monde tropical. In: C.S.A. Specialist Meeting on Phyto-geography, Yangambi, Congo, 1956. Réunion de spécialistes du C.S.A. en matière de phytogéographie. London: Commission for Technical Co-operation in Africa South of the Sahara - CCTA, Scientific Council for Africa South of the Sahara - CSA. p. 247-288.
^Aubréville A. 1957. Accord à Yangambi sur la nomenclature des types africains de végétation. Bois et Forêts des Tropiques 51, 23-27, [10].
^Trochain, J.-L. (1955). Nomenclature et classification des milieux végétaux en Afrique noire française. In: Colloque international du Centre National de la Recherche Scientifique - CNRS, 59, sur les régions écologiques du globe, Paris, juillet 1954. Annales de biologie, t. XXXI, fasc. 5-6, pp. 73-93, [11].
^Trochain, J.-L. (1957). Accord interafricain sur la définition des types de végétation de l’Afrique tropicale. Bulletin de l’Institut d’Études Centraficanes. Nouvelle Série, Brazzavilie [Congo], v. 13/14, p. 55-93.
^Dansereau, P. A universal system for recording vegetation. Montreal, University of Canada, Institute of Botany, 1958. 57 p.
^Küchler, A. W. (1967). Vegetation Mapping. New York, NY. Ronald Press. 472 pp.
^Küchler, A. W. (1965-1970). International bibliography of vegetation maps. Lawrence, Kansas: University of Kansas Libraries. 5 vol. [12]. [2nd ed., 1980, [13].]
^Dengler J, Chytrý M, Ewald J (2008) Phytosociology. In: Jorgensen SE, Fath BD (Eds) Encyclopedia of Ecology, vol. 4, General Ecology. Elsevier, Oxford, UK, 2767–2779. https://doi.org/10.1016/B978-008045405-4.00533-4
