{"id":{"repo_id":"freiburg-diss","oai_identifier":"oai:freidok.uni-freiburg.de:1361"},"canonical_url":"https://search.dev.ndltd.org/etd/freiburg-diss/oai:freidok.uni-freiburg.de:1361","repository":{"repo_id":"freiburg-diss","name":"University of Freiburg","base_url":"https://freidok.uni-freiburg.de/oai/oai2.php"},"display":{"title":"Potential of temporal and spatial analysis techniques as tools for exploring changes in forest site productivity and following environmental interactions : Finnish-German comparative study","abstract":"The main target of this study is the detection of possible changes in forest site productivity and interaction with changes in the environmental conditions by the use of temporal and spatial analysis techniques. Height and radial increments of Norway spruce (Picea abies L. Karst) and Scots pine (Pinus sylvestris L.) were used in to describe and model the sites with clear change of site quality, but also to find relationships between spatial patterns and space-time trajectories in forest growth deviations and potential causes of these changes. Investigated potential causes of growth trends related to site productivity changes like weather (basically air temperature and precipitation and subsequent derived parameters like water balance) and seasonal climate change, increasing CO2, foliar nutrition, nitrogen deposition, were assessed for the complete data set of 33 sites in Finland and 32 sites in Germany. <br>The most important investigated anthropogenic influences on site productivity changes were the deposition of nitrogen (oxidized and reduced), CO2 as well as climate change. <br>There was a quantitative difference in regard to geographical locations and tree species behave to a changing environment. The results suggested that the observed increase in site productivity under boreal conditions was due mainly to climate (air temperature change), since growth is constrained by the duration of the growing season. Moreover, central European growth acceleration was mainly due to a nitrogen fertilization effect as well as to precipitation (sites where air temperature change induced drought stress in summer months).","abstract_html":"The main target of this study is the detection of possible changes in forest site productivity and interaction with changes in the environmental conditions by the use of temporal and spatial analysis techniques. Height and radial increments of Norway spruce (Picea abies L. Karst) and Scots pine (Pinus sylvestris L.) were used in to describe and model the sites with clear change of site quality, but also to find relationships between spatial patterns and space-time trajectories in forest growth deviations and potential causes of these changes. Investigated potential causes of growth trends related to site productivity changes like weather (basically air temperature and precipitation and subsequent derived parameters like water balance) and seasonal climate change, increasing CO2, foliar nutrition, nitrogen deposition, were assessed for the complete data set of 33 sites in Finland and 32 sites in Germany. &lt;br&gt;The most important investigated anthropogenic influences on site productivity changes were the deposition of nitrogen (oxidized and reduced), CO2 as well as climate change. &lt;br&gt;There was a quantitative difference in regard to geographical locations and tree species behave to a changing environment. The results suggested that the observed increase in site productivity under boreal conditions was due mainly to climate (air temperature change), since growth is constrained by the duration of the growing season. Moreover, central European growth acceleration was mainly due to a nitrogen fertilization effect as well as to precipitation (sites where air temperature change induced drought stress in summer months).","abstract_has_math":false,"creators":["Pérez Martínez, Pedro José"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Spiecker, Heinrich"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":null,"date_issued":"","date_published":null,"updated_at":"2026-07-24T02:22:10Z","subjects":["Standortsproduktivität","räumliche Analyse","Blattnahrung","Stickstoff-Deposition","Dendroökologie","site productivity","spatial analysis","climate change","foliar nutrition","nitrogen deposition","dendrochronology","dendroecology"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://freidok.uni-freiburg.de/data/1361","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Spiecker, Heinrich"]},{"key":"dc:creator","label":"Author","values":["Pérez Martínez, Pedro José"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:type","label":"Dc Type","values":["DoctoralThesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Standortsproduktivität","räumliche Analyse","Blattnahrung","Stickstoff-Deposition","Dendroökologie","site productivity","spatial analysis","climate change","foliar nutrition","nitrogen deposition","dendrochronology","dendroecology"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The main target of this study is the detection of possible changes in forest site productivity and interaction with changes in the environmental conditions by the use of temporal and spatial analysis techniques. Height and radial increments of Norway spruce (Picea abies L. Karst) and Scots pine (Pinus sylvestris L.) were used in to describe and model the sites with clear change of site quality, but also to find relationships between spatial patterns and space-time trajectories in forest growth deviations and potential causes of these changes. Investigated potential causes of growth trends related to site productivity changes like weather (basically air temperature and precipitation and subsequent derived parameters like water balance) and seasonal climate change, increasing CO2, foliar nutrition, nitrogen deposition, were assessed for the complete data set of 33 sites in Finland and 32 sites in Germany. <br>The most important investigated anthropogenic influences on site productivity changes were the deposition of nitrogen (oxidized and reduced), CO2 as well as climate change. <br>There was a quantitative difference in regard to geographical locations and tree species behave to a changing environment. The results suggested that the observed increase in site productivity under boreal conditions was due mainly to climate (air temperature change), since growth is constrained by the duration of the growing season. Moreover, central European growth acceleration was mainly due to a nitrogen fertilization effect as well as to precipitation (sites where air temperature change induced drought stress in summer months).","Das Hauptziel dieser Studie ist die Aufdeckung von möglichen Veränderungen in der Standortsproduktivität von Wäldern unter Berücksichtigung von Umweltwechselwirkungen durch den Gebrauch von zeitlichen und räumlichen Analyse-Techniken. Baumhöhen und radiale Zuwächse der Fichte (Picea abies L. Karst) und Kiefer (Pinus sylvestris L.) wurden verwendet, um die Standorte und die Änderung der Standortproduktivität zu beschreiben, aber auch um die Zusammenhänge zwischen räumlichen Mustern und Raum-Zeit-Trajektorien in Wachstumsabweichungen und die potentiellen Verursacher dieser Veränderungen zu finden. Der komplette Datensatz aus 33 Standorten in Finnland und 32 Standorten in Deutschland wurde auf hypothetische potentielle Ursachen von Wachstumstendenzen verbunden mit Veränderungen in der Standortsproduktivität wie Wetter, CO2, Nährelementgehalte der Blätter, Stickstoffdeposition, untersucht. <br>Landespezifische Veränderungen waren auf den deutschen Standorten erkennbar, wo das Wachstum am stärksten durch den Saisonniederschlag beeinflusst wurde, während bei den finnischen Standorten ein positiver Einfluss der Saisontemperatur zu verzeichnen war. <br>Die wichtigsten untersuchten anthropogenen Einflüsse auf die Veränderungen der Standortsproduktivität waren die Deposition von Stickstoff und Schwefel, CO2 sowie möglicherweise vom Menschen induzierte Klimaveränderungen. <br>Es gab einen quantitativen Unterschied in Bezug auf die geographische Lage und das Verhalten der Baumarten bei einer sich verändernden Umwelt. Die Ergebnisse deuten darauf hin, dass die beobachtete Zunahme der Standortsproduktivität unter borealen Bedingungen hauptsächlich auf das Klima (Lufttemperatur) zurückzuführen ist, da das Wachstum von der Dauer der Vegetationsperiode abhängig ist. Dagegen wurde das beschleunigte Wachstum in Zentraleuropa im Wesentlichen aufgrund eines Stickstoff-Düngungs-Effekts sowie vom Niederschlag bewirkt."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Potential of temporal and spatial analysis techniques as tools for exploring changes in forest site productivity and following environmental interactions : Finnish-German comparative study","Potential von zeitlichen und räumlichen Analyse-Techniken für die Aufdeckung von möglichen Veränderungen in der Standortsproduktivität des Waldes unter Berücksichtigung von Umweltwechselwirkungen : eine finnisch-deutsche vergleichende Studie"]}]}],"canonical_facts":{"dc:contributor":["Spiecker, Heinrich"],"dc:creator":["Pérez Martínez, Pedro José"],"dc:description.abstract":["The main target of this study is the detection of possible changes in forest site productivity and interaction with changes in the environmental conditions by the use of temporal and spatial analysis techniques. Height and radial increments of Norway spruce (Picea abies L. Karst) and Scots pine (Pinus sylvestris L.) were used in to describe and model the sites with clear change of site quality, but also to find relationships between spatial patterns and space-time trajectories in forest growth deviations and potential causes of these changes. Investigated potential causes of growth trends related to site productivity changes like weather (basically air temperature and precipitation and subsequent derived parameters like water balance) and seasonal climate change, increasing CO2, foliar nutrition, nitrogen deposition, were assessed for the complete data set of 33 sites in Finland and 32 sites in Germany. <br>The most important investigated anthropogenic influences on site productivity changes were the deposition of nitrogen (oxidized and reduced), CO2 as well as climate change. <br>There was a quantitative difference in regard to geographical locations and tree species behave to a changing environment. The results suggested that the observed increase in site productivity under boreal conditions was due mainly to climate (air temperature change), since growth is constrained by the duration of the growing season. Moreover, central European growth acceleration was mainly due to a nitrogen fertilization effect as well as to precipitation (sites where air temperature change induced drought stress in summer months).","Das Hauptziel dieser Studie ist die Aufdeckung von möglichen Veränderungen in der Standortsproduktivität von Wäldern unter Berücksichtigung von Umweltwechselwirkungen durch den Gebrauch von zeitlichen und räumlichen Analyse-Techniken. Baumhöhen und radiale Zuwächse der Fichte (Picea abies L. Karst) und Kiefer (Pinus sylvestris L.) wurden verwendet, um die Standorte und die Änderung der Standortproduktivität zu beschreiben, aber auch um die Zusammenhänge zwischen räumlichen Mustern und Raum-Zeit-Trajektorien in Wachstumsabweichungen und die potentiellen Verursacher dieser Veränderungen zu finden. Der komplette Datensatz aus 33 Standorten in Finnland und 32 Standorten in Deutschland wurde auf hypothetische potentielle Ursachen von Wachstumstendenzen verbunden mit Veränderungen in der Standortsproduktivität wie Wetter, CO2, Nährelementgehalte der Blätter, Stickstoffdeposition, untersucht. <br>Landespezifische Veränderungen waren auf den deutschen Standorten erkennbar, wo das Wachstum am stärksten durch den Saisonniederschlag beeinflusst wurde, während bei den finnischen Standorten ein positiver Einfluss der Saisontemperatur zu verzeichnen war. <br>Die wichtigsten untersuchten anthropogenen Einflüsse auf die Veränderungen der Standortsproduktivität waren die Deposition von Stickstoff und Schwefel, CO2 sowie möglicherweise vom Menschen induzierte Klimaveränderungen. <br>Es gab einen quantitativen Unterschied in Bezug auf die geographische Lage und das Verhalten der Baumarten bei einer sich verändernden Umwelt. Die Ergebnisse deuten darauf hin, dass die beobachtete Zunahme der Standortsproduktivität unter borealen Bedingungen hauptsächlich auf das Klima (Lufttemperatur) zurückzuführen ist, da das Wachstum von der Dauer der Vegetationsperiode abhängig ist. Dagegen wurde das beschleunigte Wachstum in Zentraleuropa im Wesentlichen aufgrund eines Stickstoff-Düngungs-Effekts sowie vom Niederschlag bewirkt."],"dc:format.medium":["application/pdf"],"dc:subject":["Standortsproduktivität","räumliche Analyse","Blattnahrung","Stickstoff-Deposition","Dendroökologie","site productivity","spatial analysis","climate change","foliar nutrition","nitrogen deposition","dendrochronology","dendroecology"],"dc:title":["Potential of temporal and spatial analysis techniques as tools for exploring changes in forest site productivity and following environmental interactions : Finnish-German comparative study","Potential von zeitlichen und räumlichen Analyse-Techniken für die Aufdeckung von möglichen Veränderungen in der Standortsproduktivität des Waldes unter Berücksichtigung von Umweltwechselwirkungen : eine finnisch-deutsche vergleichende Studie"],"dc:type":["DoctoralThesis"]},"updated_at":"2026-07-24T02:22:10Z"}