An Tuff: Hallo Michael!:-) Zu den Wurzelfusionen gibt es u.A.diese Quelle: The Giant Sequoia of the Sierra Nevada, herausgegeben vom National Park Service, geschrieben von: Prof.Richard J.Hartesveldt, Prof.H.Thomas Harvey, Prof.Howard S.Shellhammer und Prof.Ronald E.Stecker 1972 San José State University California USA!:-) Da steht Seite 47 unter Fused Trees and Grafted Roots: Still another form of tissue fusion evident in the sequoia, but not studied much, is root-grafting. There are several examples of sequoia trunks without crowns that are still "alive". This happens most commonly when a smaller specimen in close proximity to a large sequoia has succumbed to shading, but still continues to "grow" by adding radial wood tissue. One large specimen exists in the Redwood Mountain Grove next to a dense cluster of large, vigorous sequoias. Increment borings indicate that, despite its loss of foliage, the "snag" is still growing at roughly one-third the rate of its->->..nourishing benefactors some 12 ft away. (12ft = ca 3.66m) In other circumstances, where stumps or separated "flying buttresses" of roots are so attached, but with the bark removed to the ground level, the bark has regrown until it covers the entire remnant, giving it an appearance not unlike that of a cypress knee (Fig.19). Walter Fry in 1903 noted one such specimen in the Giant Forest Lodge area regrowing its bark very near the ground level. The remnant, about 2.5ft tall (ca 76cm), is now completely overgrown with new bark. Meiner Ansicht nach: Weniger/keine vermodernden Wurzelstöcke= weniger Hallimasch!:-) Nun, wer will kann ja den BM in San Nazzaro/Kt.Tessin mal besuchen, und das mit den Borkenkäfern untersuchen!:-) Mich persönlich interessierts nicht sonderlich, da ein Einzelfall!:-) Dieser BM steht auf felsigem Untergrund in einem Gebiet wo oft extreme Trockenheit herrscht, zudem wurde er X-Mal vom Blitz getroffen!:-) Pflanzjahr:ca1900, BHD ca2m, Höhe: ca39m Gruss Lukas.
Autor
Thema: Wie mir die Mammutbäume begegneten 3.Teil (Gelesen 23219 mal)