Search results for "forestry"

Constraint Cellular Automata for Urban Development Simulation: An Application to the Strasbourg-Kehl Cross-Border Area

2017

AcknowledgementsThe research presented in this chapter is part of the Smart. Boundary project supported by the Fonds National de la Recherche in Luxembourg and CNRS in France (ref. INTER/CNRS/12/02). The authors would like also to thank the Grasp Program of LISER for allowing cross-collaboration between the two teams based in Luxembourg and France.; International audience; Urban sprawl and space consumption have become key issues in sustainable territorial development. Traditional planning approaches are often insufficient to anticipate their complex spatial consequences, especially in cross-border areas. Such complexity requires the use of dynamic spatial simulations and the development of…

Woodland key habitats in northern Europe: concepts, inventory and protection

2010

Abstract The woodland key habitat (WKH) concept has become an essential instrument in biodiversity-orientated forest management in northern Europe. The philosophy behind the concept is basically the same in all of the countries: to conserve the biodiversity of production landscapes by preserving small habitat patches that are supposed to be particularly valuable. This article reviews the definitions, inventories and implementation processes of WKHs in Sweden, Finland, Norway, Latvia, Estonia and Lithuania. Sweden and the Baltic countries have similar WKH models, while the models in Finland and Norway are clearly deviating. Depending on the country, the definitions emphasize different factor…

Les hêtraies du Châtillonnais (Côte-d'Or) face au changement climatique.

2013

15 pages; International audience; L'étude traite des hêtraies du Châtillonnais (Côte-d'Or, Bourgogne) face au changement climatique observé. Les données regroupent les séries bourguignonnes de température et de précipitation des stations de Météo France (1989-2009), la carte des hêtraies de l'Institut forestier national (IFN), un modèle numérique de terrain (MNT, SRTM) et quatre indices de vulnérabilité du hêtre identifiés dans la littérature. La méthode repose sur une interpolation fine (mailles de 100 m) de ces indices par régression-krigeage. Les résultats permettent de cartographier les risques actuels.

The vegetation of a historic road system in the suburban area of Monte Pellegrino (Palermo, Sicily)

2020

Knowledge of the processes by which plants colonize old structures is a key element for nature-based design both in urban and suburban contexts. This paper analyses the natural vegetation on walls and in other microhabitats of the roadway structures of Monte Pellegrino (606 m a.s.l.) near Palermo (Sicily), built in the first half of the 1900s. The historical road has particular construction and architectural features, and its characteristics have been maintained to this day. The route, approximately 16 kilometers long, is well integrated within a site of high naturalistic value which has been designated as a Special Area of Conservation (ITA020014) of the Natura 2000 network, and it is also…

Ring diameter effects on determination of field-saturated hydraulic conductivity of different loam soils

2017

Abstract Establishing ring diameter effects on the field-saturated soil hydraulic conductivity, Kfs, determined with ponding infiltrometer methods can help to find a compromise between the need to sample a large area with an individual measurement and the impracticality of using large rings in the field. Five ring sizes (diameter, D = 5.5, 10.9, 16.0, 27.8 and 31.8 cm) were used to determine Kfs by the simplified falling head (SFH) technique in four loamy soils with different salinity (electrical conductivity of saturated extract, ECe = 0.9–29.4 dS/m) and sodicity (exchangeable sodium percentage, ESP = 2.7–81.3%) levels. According to USDA classification, two soils were non-saline, non-sodic…

Die bedeutung von Eiwei� und Fett f�r die ern�hrung des Menschen.

1948

Biomasse, productivité et transferts de matière organique dans une séquence altitudinale de peuplements de Castanea sativa Mill de l'Etna

1996

Les differents compartiments et flux caracterisant la repartition de la matiere organique sont etudies dans quatre taillis de Castanea sativa Mill, etages le long d'un gradient altitudinal, dans le massif de l'Etna (Sicile). Les biomasses epigees sont respectivement de 22 et de 24 Mg ha -1 a 7 ans, 83 Mg ha -1 a 12 ans et 100 Mg ha -1 a 22 ans, avec de bonnes correlations : biomasse/âge et biomasse/facteurs climatiques. Le bois represente 95 % et les feuilles 5 % de ces biomasses. Les productions aeriennes perennes s'echelonnent entre 2,4 et 5,4 Mg ha -1 an -1 en relation a la fois avec l'âge des taillis et leur localisation geographique. Les retombees de litiere, observees durant 3 annees …

Dynamic response in pH and the transient behavior of some chemical elements in pulp-water suspensions

1999

Mechanisms of Organic Coating on the Surface of a Poplar Biochar

2017

Background: Recent studies highlighted that biochar efficiency to improve soil fertility is enhanced after it is blended with fresh organic materials. It was suggested that organic coating of inner-porous biochar surfaces acts as a kind of “glue” for plant-nutrients, thereby allowing their slow release towards plant-roots and/or microorganisms. Objective: The aim of the present study is to improve the understanding of the nature of the interactions between fresh organic matter and a poplar biochar. Method: Two fluorinated organic models were used as target molecules in order to apply heteronuclear (i.e. 19F) fast field cycling (FFC) NMR relaxometry. Results: The results suggest that organic…

Contrasting evolution of iron phase composition in soils exposed to redox fluctuations

2018

Abstract Ferric iron (FeIII) solid phases serve many functions in soils and sediments, which include providing sorption sites for soil organic matter, nutrients, and pollutants. The reactivity of Fe solid phases depends on the mineral structure, including the overall crystallinity. In redox-active soils and sediments, repeated reductive dissolution with subsequent exposure to aqueous ferrous iron (Fe2+) and oxidative re-precipitation can alter Fe phase crystallinity and reactivity. However, the trajectory of Fe mineral transformation under redox fluctuations is unclear and has been reported to result in both increases and decreases in Fe phase crystallinity. Several factors such as water bu…