Browsing by Autor "Kenneth R. Young"

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Aquatic plants of Peru: diversity, distribution and conservation
(Springer Science+Business Media, 1996) Blanca León; Kenneth R. Young
BOOK REVIEWS
(Wiley, 1993) Blanca León; Kenneth R. Young
Seeliger, U. (ed.). 1992. Coastal Plant Communities of Latin America. xx + 392 pp. Academic Press, San Diego, CA. ISBN 0‐12 634550‐3. Price: USD 75.‐. Short reviews R. Pott (ed.). 1989. Rintelner Symposium I. Berichte der Reinhold‐Tüxen‐Gesellschaft 1 , 165 pp. Reinhold‐Tüxen‐Gesellschaft, Institut für Geobotanik, Nienburger Str. 17, D‐3000 Hannover, Germany. ISBN 3‐88452‐775‐4. Price: not indicated. R. Pott (ed.). 1991. Berichte der Reinhold‐Tüxen‐Gesellschaft 3 , 291 pp. ISBN 3‐88452‐776‐2. Price: DEM 55.‐. Hügin, Gerhard & Henrichfeise, Alfons. 1992. Naturschutzbewertung der badischen Oberrheinaue. Vegetation und Wasserhaushalt des rheinnahen Waldes. 48 pp + maps. Schriftenreihe für Vegetationskunde 24. Bundesforschungsanstalt für Naturschutz und Landschaftsökologie, Bonn‐Bad Godesberg. ISBN 3‐7843‐2072‐4. Preis DEM 10.‐. Duhme, F., Lenz, R. & Spandau, L. (eds). 1992. 25 Jahre Lehrstuhl für Landschaftsökologie in Weihenstephan mit Prof Dr. Dr. h.c. W. Haber. Landschaftsökologie Weihenstephan 6. Freunde der Landschaftsökologie Weihenstephan, Ziegelgasse 19, D‐8050 Freising, Germany. ISBN 3‐922318‐06‐1. Price: not indicated.
CURVATURE OF WOODY PLANTS ON SLOPES OF A TIMBERLINE MONTANE FOREST IN PERU
(Taylor & Francis, 1990) Kenneth R. Young; Blanca León
Measurements of above and below-ground portions of woody plants ≤ m in height were made along a transect on a 31 ´ slope in tropical montane rain forest near treeline in northern Peru. Almost all stems were basally curved, and most of the belowground axes were curved and situated upslope relative to the stem base. Microscopic examination demonstrated that underground curvature, and the resulting aboveground basal stem curvature, was due to stem burial, followed by adventitious rooting. We suggest that it was litter creep and branch movements along the slope that caused this burial. A threshold model would best explain how and when these curvatures occur: plant form and growth will only be affected by soil creep and other noncatastrophic downslope forces when the plant is within critical size classes of stem diameter and rooting depth. [Key words: geomorphic processes, Peru, soil creep, tropical montane forest.]