Protecting trees through an inventory and typology : heritage trees in the Karavanke mountains, Slovenia
Cultural heritage ; Information system ; Nature conservation ; Protected area ; Slovenia ; Tree ; Tree species
This paper introduces an advanced approach to natural and cultural heritage inventory for the study of heritage trees. Because trees play different roles in society, different regulations apply to their preservation, which can lead
to inconsistencies in records for heritages trees. The inventory of heritage trees and their types in the study area is based on existing lists of heritage trees, fieldwork and interviews. A new database of heritage trees has been established in which the advantage
Tree establishment on bars in low-order gravel-bed mountain streams
Alberta ; Canada ; Flood ; Mountain ; Plant colonization ; Riparian vegetation ; River bed ; Rocky Mountains ; Sedimentation ; Stream ; Tree ; Vegetation
This study was conducted in first- to third-order streams of Jumping Pound Creek in the Front Ranges of the Canadian Rocky Mountains, west of Calgary, Alberta, to provide an alternative explanation for patterns of tree recruitment in low order
gravel-bed mountain streams that does not conform to the standard lateral accretion model of tree recruitment for larger rivers. It is suggested that vertical accretion results in sediment deposition patterns on bars that are often highly patchy
. Consequently, tree species and ages are also heterogeneously distributed. Recruitment is fairly continuous on these bars and is not correlated with high water years, suggesting that even flows close to bankfull levels are capable of transporting fine sediment
to the bars on which trees establish. This pattern of sediment deposition/erosion and the resulting tree recruitment and survival seem to be a result of valley confinement and the lack of lateral accretion in these smaller, mountainous channels.
In this work tree rings were used to investigate a disruptive snow avalanche which occurred in 2001 in Val Mala in the Italian Alps. Comparison of tree reaction in surviving plants along the flow path and vegetation on the border showed i
) the production of reaction wood even in apparently undisturbed trees and ii) the usefulness of border plants for dating past events. Different dendroecological indicators were investigated. The results confirm the possibility of applying dendrochronological
techniques to trees adjacent to the flow path, even if they appear morphologically undisturbed, and proposes to use only border areas in cases of an absence of sufficient trees along the avalanche track.
Biogeography ; Climatic change ; Ecotone ; Environmental management ; Habitat ; Humid environment ; Mountain ; Peat bog ; Soil properties ; Topography ; Tree ; United States of America ; Vegetation dynamics ; West Virginia
Tree establishment patterns were analyzed in regard to location within the ecotone, hummock/hollow topography, and soil conditions by recording the growing conditions of 1389 trees located within 9 transects in the Cranberry Glades Botanical Area
. The results indicated that tree growth within the ecotone occurred in decreasing density from the forest to the meadow interior, and much of the tree establishment occurred in tree islands. Significantly more trees (92%) were also found on hummocks than
Debris-flood reconstruction in a pre-alpine catchment in Switzerland based on tree-ring records of coniferous and broadleaved trees
The AA. present a case study of a debris-flood fan covered with coniferous and broadleaved tree species affected by past torrential activity in a pre-alpine catchment with limited sediment supply. The reconstruction is based on the sampling of 148
trees on the fan of the Torrent de la Greffe, Valais, Switzerland. Through the analysis of the trees sampled and their spatial distribution on the fan surface they analyse the debris-flood frequency of the torrent and the spatial imprint of past events.
Responses of Tree Islands to Air Temperature Change at Treeline on North-Facing Slopes of the Changbai Mountains
Air temperature ; Birch ; China ; Climatic change ; Climatic warming ; Jilin ; Mountain ; Population dynamics ; Tree island ; Tree line
This paper seeks to understand the relationship between air temperature change and annual stem recruitment of the Betula ermanii population at the local scale in the upper treeline, based on data between 1953 and 2008 from field observations, tree
Chemical elements and heavy metals in European larch tree rings from remote and polluted sites in the European Alps
Air pollution dispersal in the European Alps has been studied both for glacial and forest environments. In this study, chemical elements and heavy metals in the tree rings were analyzed for seven sites of European larch (Larix decidua Mill
Bioclimatology ; Climatic change ; Climatic warming ; Colorado ; Mountain ; New Mexico ; Precipitation ; Rocky Mountains ; Slope exposure ; Spatial variation ; Temperature ; Threshold ; Tree line ; Twentieth Century ; United States of America
By using dendrochronological techniques, the AA. reconstructed tree establishment at upper treeline on 6 mountain peaks within the Front Range and Sangre de Cristo Mountains. They compared age-structure data with climate using Spearman's rank
correlation coefficients between annual and seasonal climate indexes and tree establishment dates at both regional (southern Rockies) and landscape scales (mountain range). Regime-shift analysis detected thresholds in temperature, precipitation, and tree
Utility of classification and regression tree analyses and vegetation in mountain permafrost models, Yukon, Canada
Canada ; Classification ; Cold area ; LANDSAT ; Model ; Northwest Territories ; Periglacial features ; Permafrost ; Regression analysis ; Remote sensing ; Spatial distribution ; Tree ; Vegetation ; Vegetation index ; Yukon
Classification and regression tree (CART) analyses were undertaken to test the usefulness of including vegetation variables in mountain permafrost distribution models for 5 widely spaced study areas in the Yukon. Digital elevation model (DEM
from 35 disturbed Fagus sylvatica trees. These samples were taken in five model locations, representing the most problematic sections of the entire area. For reasons of sample depth, the analysis was limited to the period from 1900 to 2006. The article
focuses on growth disturbances such as eccentric growth of annual tree-rings and abrupt growth changes. - (EN)
A network chronology, compiled from cross-dateable regional master oak and pine tree-ring chronologies, reveals periods of low and high growth rates in trees that can be indicative of paleoclimates. Tribal activity was defined by contemporaneous
documentation of attacks, incursions, migrations, and evidence of new or abandoned settlements where dates are known or widely accepted. The co-occurrence frequency between low-growth years as evident in trees and tribal activity was high, at 74% for all 201
Australia ; Biogenic process ; Burrowing animal ; Fire ; Infiltration ; New South Wales ; Sediment transport ; Slope ; Soil erosion ; Tree uprooting
This study explored the direct flux of soil caused by Aphaenogaster ant mounding, vertebrate scraping and tree-throw on a wildfire-affected hillslope in south-east Australia. This included the development and an evaluation of methods for estimating
the volume of soil displaced by tree-throw events. All 3 bioturbation types resulted in a net downslope flux, but any influence of hillslope angle on flux rates appeared to be overshadowed by environmental controls over the spatial extent of bioturbation
The AA. test the potential of conifers growing at a low-latitude, high-elevation site as a dendrogeomorphic tool to reconstruct to calendar dates associated rockfall activity. Analysis is based on tree-ring records of Mexican mountain pine growing
at timberline (~4000 m a.s.l.) and at the runout fringe of a NNE-facing slope of the dormant Iztaccíhuatl volcano (Mexico), which is subject to frequent rockfalls. The potential and limitations of tree-ring data are demonstrated based on 67 rockfall impacts
dated in the increment-ring series of 24 trees since AD 1836. While findings of this paper are site-specific, the study clearly shows the potential of dendrogeomorphic approaches for the understanding of rockfall processes in space and time.
Air quality ; BVOC ; Carbon sequestration ; Heat island ; Town ; Tree ; Vegetation ; carbon sequestration ; computer modelling ; urban heat island
Vegetation has been well recognized for its ability in improving air quality and alleviating global warming. Tree planting has been used to mitigate urban heat island phenomena, sequester carbon dioxide, and help to trap air pollutants on leaves
This paper jointly analyses multitemporal, multispectral ASTER data, continuous river stage and discharge data, and field observations of the growth rates of the dominant riparian tree species (Populus nigra) along a 21 km reach of the Tagliamento
for investigating vegetation dynamics along large fluvial corridors and reveals both spatial and temporal variations in the expansion, coalescence, and erosion of vegetated patches within the study reach. It is illustrated that the rate of growth of riparian trees
Altitude ; Biogeography ; Catastrophe ; China ; Damage valuation ; Ecological catastrophe ; Forest ; Snow ; Southern China ; Spring (season) ; Storm ; Tree species
pine (introduced species)> masson pine (native pioneer species)> mixed plantation > Chinese fir (local tree species). Turpentine activities, altitude, ice and snow accumulation are also considered.
. As herbaceous vegetation was more efficient than trees in improving aggregate stability, it is suggested that mixtures of different plant functional types would improve soil conservation on slopes, by reducing both surface water erosion and shallow substrate
mass movement. Planting trees for cropping or logging, and removing understory vegetation is most likely detrimental to soil conservation.