On the theoretical concept of the potential natural vegetation and proposals for an up-to-date modification

In the extent to which it is used, the concept of the potential natural vegetation (PNV) is one of the most successful novelties in vegetation science over the last decades. However, previous applications of the concept have shown that the theoretical principles were used inconsistently or interpreted in an incorrect sense. The present problems in application (which become evident when visualizing historical aspects of the concept) mainly result from (a) inconsistent treatment of the construction criteria; (b) failure to distinguish between the “potential natural vegetation”, the “reconstructed natural vegetation” and the vegetation developing during succession, (c) the lack of a precise definition for reference terms to construct potential natural vegetation (e.g. treating reversible vs. irreversible changes of vegetation). For a sensible application of the concept it is suggested (a) to construct the potential natural vegetation on the basis of natural site conditions as well as permanently effective site changes as a consequence of human impact, (b) to consider the PNV to be in balance with all site conditions taken as basis for its construction. In practice, however, the construction basis may also derive from a particular question underlying the making of a PNV-map. A suggestion for a re-definition of the term “potential natural vegetation” as well as a key for PNV-mapping (valid for landscapes of Northern Germany) are given.

[1]  Frederic E. Clements,et al.  Nature and Structure of the Climax , 1936 .

[2]  Áskell Löve,et al.  Liste der Gefasspflanzen Mitteleuropas. , 1974 .

[3]  A. Kerner,et al.  Das Pflanzenleben der Donauländer , 1929 .

[4]  H. Ellenberg,et al.  Vegetation Mitteleuropas mit den Alpen in ökologischer Sicht , 1980 .

[5]  H. Gams.  Prinzipienfragen des Vegetationsforschung. Ein Beitrag zur Begriffsklarung und Methodik der Biocoenologie. , 1919 .

[6]  G. Sissingh.  Optimal woodland development on sandy soils in The Netherlands , 1977, Vegetatio.

[7]  E. Maarel,et al.  A vegetation map of The Netherlands, based on the relationship between ecotopes and types of potential natural vegetation , 2004, Vegetatio.

[8]  E. Warming,et al.  Lehrbuch der ökologischen Pflanzengeographie : eine Einführung in die Kenntnis der Pflanzenvereine , 1896 .

[9]  F. Clements.  Scientific Books: Plant Succession. An Analysis of the Development of Vegetation , 2009 .

[10]  A. Tansley,et al.  The Classification of Vegetation and the Concept of Development , 1920 .

[11]  H. Dierschke.  Anthropogenous areal extension of central European woody species on the British Isles and its significance for the judgement of the present potential natural vegetation , 1985, Vegetatio.

[12]  Jaroslav Moravec,et al.  Succession of plant communities and soil development , 1969, Folia Geobotanica et Phytotaxonomica.

[13]  D. Rietz,et al.  Zur methodologischen Grundlage der modernen Pflanzensoziologie , 1921 .

[14]  J. Braun-Blanquet,et al.  Pflanzensoziologie: Grundzuge der Vegetationskunde. , 1967 .

[15]  I. Kowarik.  Kritische Anmerkungen zum theoretischen Konzept der potentiellen natürlichen Vegetation mit Anregungen zu einer zeitgemässen modifikation , 1987 .

[16]  Robert H. Whittaker,et al.  Classification of natural communities , 2008, The Botanical Review.

[17]  Anthropogenous areal extension of central European woody species on the British Isles and its significance for the judgement of the present potential natural vegetation , 1985 .

[18]  R. J. Pool,et al.  Plant Succession. An Analysis of the Development of Vegetation , 1917 .

[19]  H. Jenny,et al.  Derivation of State Factor Equations of Soils and Ecosystems , 1961 .

[20]  J. Kalkhoven,et al.  Mapping the Potential Natural Vegetation , 1988 .

[21]  H. Ellenberg.  Vegetation Mitteleuropas mit den Alpen : in ökologischer ,dynamischer und historischer Sicht , 2010 .

[22]  C. E. Moss.  THE FUNDAMENTAL UNITS OF VEGETATION , 1910 .

[23]  Robert H. Whittaker,et al.  A Consideration of Climax Theory: The Climax as a Population and Pattern , 1953 .