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Home > Biographies & Memoire > Biography and non-fiction prose > Anthologies: general > Die Wechselbeziehungen Zwischen Pflanzen Und Ameisen Im Tropischen Amerika
Die Wechselbeziehungen Zwischen Pflanzen Und Ameisen Im Tropischen Amerika

Die Wechselbeziehungen Zwischen Pflanzen Und Ameisen Im Tropischen Amerika


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About the Book

Dieses historische Buch kann zahlreiche Tippfehler und fehlende Textpassagen aufweisen. Kaufer konnen in der Regel eine kostenlose eingescannte Kopie des originalen Buches vom Verleger herunterladen (ohne Tippfehler). Ohne Indizes. Nicht dargestellt. 1888 edition. Auszug: ... more dangerous enemy, the leafcutting ants..." B e 11 zeigt im Folgenden, dass von den Schutzameisen frei bleibende Exemplare der Acacia beinahe unfehlbar von den Blattschneidern entlaubt werden. Die Anwesenheit von Ameisen ist nach dem Vorhergehenden der Acacia sphaerocephala unzweifelhaft von grossem Nutzen; es fragt sich jedoch, ob dieselbe ihren Schutzthieren angepasst ist und in welcher Weise. 12. Als buschiger, viel verzweigter, sehr stacheliger Strauch oder kleiner Baum, mit grossen, doppelt-gefiederten Blattern und kopfchen formigen Inflorescenzen, gleicht Acacia sphaerocephala in ihrem Gesammthabitus vielen anderen amerikanischen Arten desselben Genus. Der einzige beim ersten Blicke auffallende Unterschied ist die bedeutende Grosse und hornartige Gestalt der Stacheln, an welchen man vielleicht von vornherein den Einfluss der Ameisen erkennen wollen wird, da sie es ihrer Grosse und ihrem hohlen Innern allein zu verdanken haben, dass sie von den Schutzthierchen bewohnt werden. Ich wusste indessen keinen ganz stichhaltigen Grund fur diese Annahme anzufuhren. Fur dieselbe spricht indessen entschieden der Umstand, dass die Stacheln von Acacia sphaerocephala bei grosserem Aufwand von Material eine schwachere Schutzwaffe darstellen, als kleinere, aber solide Stacheln, um so mehr, als ihre sehr dunne Wand, mit Ausnahme der Schimper'B Mittheil. 4 Spitze, langer weich bleibt, als bei gewohnlichen Stacheln. Die Eintrittsoffnung wird von den Ameisen beinahe stets in der Nahe der Spitze gebohrt, obwohl diese Stelle nicht, wie bei Cecropia, vorgezeichnet ist. Die ganze Wand besteht vielmehr gleichmassig aus..."


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Product Details
  • ISBN-13: 9781235173721
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 32
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1235173720
  • Publisher Date: 01 Oct 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 77 gr


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