Forstwissenschaftliches Centralblatt

, Volume 91, Issue 1, pp 248–263 | Cite as

Über die Beziehungen zwischen einigen biotischen und abiotischen Faktoren im Latemar-Forst (Bozen)

  • L. Susmel
Abhandlungen

Summary

An investigation has been carried out in the forest of Latemar (the Italian central eastern Alps), dominated byPicea excelsa withAbies alba, Larix europaea andPinus cembra, on the interactions between humus type (tabs 1, 2), litter and understory (including natural regeneration) composition on one hand and tree layer canopy and altitude on the other hand. Starting from ecological profiles, entropy-species (fig. 2, tab. 3) and entropy-factor have been calculated for the factors examined (tab. 4). This way it has been possible to determine the mutual information, the correct ecological profiles and the species groups index for the humus type (tab. 5), height (tab. 6) and canopy (tab. 7), which has allowed to grade species behaviour as regards investigated factors and consequently to single out three groups of species with similar ecological requirements (tab. 8). Moreover litter-humus entropy (tab. 9) and the same cybernetic parameters have been determined for the factor humus.

The distribution of each group of species index is characterized by different combination of local factors (tab. 8):

Humus type variations depend to a great extent on tree layer canopy and, through this layer, on the resulting litter composition and density: the “correcting” action of grasses with a low C:N on humus evolution is evident (tab. 10).

From the silvicultural standpoint, leaving out uniform methods on large areas and chiefly clearcuts, an elastic treatment seems to be recommended, adhering to the actual conditions of forest and soil structure in order to achieve the density with major chances to secure favourable conditions of bioclimate, understory, humus and consequently regeneration. In the “semplified” forest ecosystem, as the investigated one, where natural levels of consumers (herbivores and carnivores) are actually missing, functionality may be secured through proper cuts only and by regularly restoring the nutrients of the litter, here almost entirely vegetal, to the cycle.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literatur

  1. Abramson, N., 1963: Information theory and coding. McGraw Hill.Google Scholar
  2. Godron, M., 1966: Application de la théorie de l'information à l'étude de l'homogénéité et de la structure de la végétation. Oecologia Plantarum.Google Scholar
  3. Guillerm, J. L., 1971: Calcul de l'information fournie par un profil écologique et valeur indicarrice des espèces. Oecologia Plantarum.Google Scholar
  4. Hartmann, F., 1952. Forstökologie. Vienna: Fromme.Google Scholar
  5. Ders., 1970, Diagnosi degli humus forestali su basi biomorfologiche. Padova: Cedam.Google Scholar
  6. Köstler, J. N., 1950: Walsbau, Berlin-Hamburg: Paul Parey.Google Scholar
  7. Ders.,Köstler, J. N., 1954: L'analyse du sous-bois comme base de recherche. C. r. XI, IUFRO-Kongreß, Firenze.Google Scholar
  8. Ders.,Köstler, J. N., 1956: Allgäuer Plenterwälder. Forstw. Cbl. 75.Google Scholar
  9. Ders.,Köstler, J. N., 1958: Problemi delle fustaie da dirado a nord e a sud delle Alpi. Annali Acc. It. Scienze forestali, vol. VII, Firenze.Google Scholar
  10. Leibundgut, H., 1950: Biologische und wirtschaftliche Gesichtspunkte im schweizerischen Waldbau. AFZ 61.Google Scholar
  11. Ders.,Leibundgut, H., 1953: Beobachtungen über den Streuabbau einiger Baumarten im Lehrwald der ETH. Schweiz. Z. f. Forstw. 4/5.Google Scholar
  12. Ders.,Leibundgut, H., 1958: Ziele und Wege der waldbaulichen Forschung und Lehre. Schweiz. Z. f. Forstw. 1.Google Scholar
  13. Ders.,Leibundgut, H., 1962: Bosco, selvaggina e regione, intesi come unità. L'Italia Forestale e Montana 2.Google Scholar
  14. Mayer, H., 1961: Waldbauliche Aspekte der Entstehung des nordalpinen Tannen-Buchen-Waldes. Schweiz. Z. f. Forstw. 7.Google Scholar
  15. Ders.,Mayer, H., 1966: Waldbauliche Entwicklungstendenzen. AFZ 2.Google Scholar
  16. Mayer, H., 1966: Angewandte Forstliche Vegetations-und Standortskunde. Forstw. Cbl. 85.Google Scholar
  17. Ders.,Mayer, H., 1967: Zur Behandlung überalterter Gebirgswälder. Schweiz. Z. f. Forstw. 6.Google Scholar
  18. Nguyen, K.; Vedy, J. C.; Duchaufour, Ph., 1969: Etude expérimentale de l'évolution saisonnière des composés humiques en climat tempéré. Pedologie, XIX, 1. Gand.Google Scholar
  19. Schmid, E., 1944: Vegetationskarte des Schweiz. 1:200 000-„Blatt 1–4 Kümmerly e Frey”. Bern, 1944–51.Google Scholar
  20. Susmel, L., 1956: Leggi di variazione dei parametri della foresta disetanea normale (Abies-Picea-Fagus-Picea). L'Italia Forestale e Montana. 3.Google Scholar
  21. Ders.,Susmel, L., 1955: Riordinamento su basi bio-ecologiche delle abetine di S. Vito di Cadore. Pubbl. Stazione Sperimentale di Selvicoltura, Firenze.Google Scholar
  22. Ders.,Susmel, L., 1958: Nota sulle attuali tendenze dello studio delle stazioni forestali. Note forestali, Firenze.Google Scholar
  23. Vedy, J. C.; Bruckert, S., 1970: Evolution saisonnière de composés organiques solubles en relation avec divers processus biochimiques d'humification. Pedologie, XX, 2, Gand.Google Scholar

Copyright information

© Verlag Paul Parey 1972

Authors and Affiliations

  • L. Susmel

There are no affiliations available

Personalised recommendations