Centre de documentation
scientifique

Dépouillements

Validation of medium-scale historical maps of southern Latvia for evaluation of impact of continuous forest cover on the present-day mean stand area and tree species richness / Anda Fescenko in Baltic forestry, vol 22 n° 1 ([01/02/2016])  

Public [article]  inBaltic forestry > vol 22 n° 1 [01/02/2016] . - pp 51 - 62 Titre : Validation of medium-scale historical maps of southern Latvia for evaluation of impact of continuous forest cover on the present-day mean stand area and tree species richness Type de document : Article/Communication Auteurs : Anda Fescenko, Auteur ; Martins Lukins, Auteur ; Ilja Fescenko, Auteur Année de publication : 2016 Article en page(s) : pp 51 - 62 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse multivariée [Termes IGN] carte ancienne [Termes IGN] continuité géographique [Termes IGN] couvert forestier [Termes IGN] données multitemporelles [Termes IGN] écosystème forestier [Termes IGN] feuillu [Termes IGN] inventaire forestier étranger (données) [Termes IGN] Lettonie [Termes IGN] régression [Termes IGN] richesse floristique [Termes IGN] station forestière [Termes IGN] utilisation du sol Résumé : (auteur) Medium-scale historical maps are often the only cartographic source of former forest area distribution on a regional level. In conjunction with a database of the current distribution of species or functional traits, maps may be valuable tool for studying the impact of previous land use on ecosystems. In this study a heterogeneous set of historical maps was used to reconstruct the multi-temporal pattern of the forest area in a moderately forested region (5,180 km2) of southern Latvia during the last 220 years. Changes in the total forest cover were assessed in four time slices and compared with available historical statistical data. To validate the obtained multi-temporal data for ecological studies, the impact of continuous forest cover on the present-day mean stand area and tree species richness derived from the present-day forest inventory database of 94,886 stands was quantified by bivariate and regression analyses. We found no significant impact of inaccuracy of the historical maps on the entire forest continuity pattern of the study area. In particular, the diversity metrics dependencies on the forest continuity can be described by quadratic regression models with coefficients of determination close to one. We also found that the mean stand area is for about 18% larger in woodlands with longer forest continuity irrespective of the forest type. The older woodland the less difference was found between boreal deciduous and nemoral deciduous forests in terms of tree species richness. Numéro de notice : A2016--096 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : sans En ligne : https://balticforestry.lammc.lt/bf/PDF_Articles/2016-22%5b1%5d/e-Baltic%20Forest [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84649 [article]

Use of GIS-supported comparative cartography and historical maps in long-term forest cover changes analysis in the Holy cross mountains (Poland) / Tadeusz Ciupa in Baltic forestry, vol 22 n° 1 ([01/02/2016])  

Public [article]  inBaltic forestry > vol 22 n° 1 [01/02/2016] . - pp 63 - 73 Titre : Use of GIS-supported comparative cartography and historical maps in long-term forest cover changes analysis in the Holy cross mountains (Poland) Type de document : Article/Communication Auteurs : Tadeusz Ciupa, Auteur ; Roman Suligowski, Auteur ; Grzegorz Walek, Auteur Année de publication : 2016 Article en page(s) : pp 63 - 73 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse comparative [Termes IGN] analyse diachronique [Termes IGN] carte thématique [Termes IGN] couvert forestier [Termes IGN] dix-neuvième siècle [Termes IGN] géoréférencement [Termes IGN] MNS SRTM [Termes IGN] Pologne [Termes IGN] vectorisation [Termes IGN] vingtième siècle Résumé : (auteur) In recent years, forest research benefits from access to archived cartographic materials and geographic information systems technology, which both allow to analyze the processes of forest cover changes over time. Available digital elevation models (DEMs) and soil maps make it possible to consider terrain relief and soils characteristics in the research. The present paper analyzes changes of forest cover in the Holy Cross Mountains (central Poland) within the period of 1800–2011 and they relation to altitude and slope gradient classes as well as to genetic soil groups. The source materials consist of topographic maps created in 1800, 1900, 1930, 1983 and thematic maps: Polish Sozological Map in 1: 50,000 scale from 2011, Soil Map of Poland in 1: 300,000 scale and SRTM3 digital elevation model. Scanned maps were georeferenced to metric coordinate system and then forest areas were digitalized by on-screen vectorization. Digital elevation model was used to delineate elevation and slope gradient classes. Finally, the overlay geoprocessing methods were used to analyze the areas of forest cover changes in time, also in addition to altitude zones, slope gradient and genetic soil type classes. Forest cover indicator (%) and mean annual index of forest cover change (ha•year-1) have been calculated. Forest cover was the highest at the beginning of the study period in 1800 and the lowest in 1930. The decrease in forest cover in this period equaled 35.3 %. A slow process of recovery began in 1930 and continues till today. However, the coverage noted in 1800 has not yet been achieved. Also forest cover stability analysis has been performed. Today forest areas of very high stability cover about 21% of the Holy Cross Mountains and 49% of the area covered by trees in 1800. The present analysis has been performed with the use of GIS-supported comparative cartography and historical maps, which have significantly improved the investigations of long-term forest cover changes. Numéro de notice : A2016--097 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : sans En ligne : https://www.balticforestry.mi.lt/bf/PDF_Articles/2016-22%5b1%5d/e-Baltic%20Fores [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84650 [article]