Biomechanical effects of trees on soil and regolith : beyond treethrow
Arkansas ; Conceptual model ; Forest soil ; Regolith ; Sediment transport ; Soil ; Soil properties ; Tree ; United States of America
The aim of this study was to investigate biomechanical effects of trees beyond treethrow, particularly displacement by tree growth and the potential for transport of regolith material into stump holes. Specifically, they sought to document
associated with individual trees. Rocky soils in the Ouachita Mountains in Arkansas were studied.
Spatial clusters and variability analysis of tree mortality
Biogeography ; Cluster analysis ; Forest ; Geographical information system ; Georgia (USA) ; Inventory ; Mortality ; Spatial analysis ; Sustainable development ; Tree ; United States of America
The AA. focus on the spatial cluster characteristics of forest tree mortality in the state of Georgia by using permanent plot data from the 1989 and 1997 FIA inventories, spatial scan statistic and semivariogram analysis methods, and geographic
information system (GIS) techniques. Eight kinds of tree damage, possibly combined with other kinds damage.
Biogeography ; Conceptual model ; Geomorphology ; Impact ; Montana ; Mountain ; Spatial distribution ; Tree line ; United States of America
The aim of this study is to propose a conceptual model that describes the multi-spatial-scale relationship between treeline advance and geomorphology. The approach examines the spatial patterns of tree occurrence in Glacier National Park, Montana
, at 3 spatial scales to establish the relative roles of macro- (landscape scale), meso- (aspect and elevation), and microscale (level of individual tree growth, establishment, and death) controls on tree establishment at the highest locations of alpine
Near Westcliffe, Colorado, data were collected from a transect on the east slope of the Sangre de Cristo Mountains. Ages of pit/mound complexes with rock fragments exposed at the surface by root throw ranged from recent (freshly toppled tree
) to unknown (complete tree decay). Calculations based on dimensions of the pit/mound complexes, estimated time of tree topling, sizes of exposed rock fragments, and percentage rock covers at pit/mound complexes, as well as within the transect area, indicate
Signs of postglacial geomorphic evolution are predominant in the cirques of the highest volcanic massif of the Carpathians, the Calimani Mountains. Changes in the treeing-widths in Swiss stone pine trees of the upper timberline
Dendrogeomorphology was used to investigate past events on a cone affected by both debris flows and snow avalanches. The AA. report on results of 520 cores from 251 trees sampled on the Birchbach cone (Swiss Alps), for a 252 yr period, extending
from 1750 to 2002. Thereafter, the AA. assess the approximate area affected as well as the origin of past debris-flow and snow avalanche events on the cone using tree-ring records in conjunction with the results from geomorphic mapping.
Argentina ; Biogeography ; Ecosystem ; Forest ; Forest stand ; Phytogeography ; Phytosociology ; Scrub ; Spatial distribution ; Tree species ; Vegetation
In this study, the A. focused on documenting the size and age distribution of oaks, and the density and diversity of all tree species. The questions addressed were : what is the relationship between age and size patterns of oak regeneration under
Biological indicator ; Correlation ; European part of Russia ; Forest stand ; Glaciation ; Landscape ; Landscape structure ; Marginal area ; Novgorod ; Spatial distribution ; Tree
by interpolating the number of rockfall injuries per tree. Temporal analyses comprised the calculation of rockfall rates, trends in rockfall activity and their correlations with mean annual or seasonal temperatures, and precipitation totals.
The study area is located in upper Valtellina (Central Italian Alps). The aim of this study is to estimate the erosion rate along the 2 trails and to study the effects of walking and foot trampling on tree growth, by using dendrogeomorphological