Now showing 1 - 10 of 15
  • 2017Journal Article
    [["dc.bibliographiccitation.firstpage","19"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","26"],["dc.bibliographiccitation.volume","395"],["dc.contributor.author","Juchheim, Julia"],["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Seidel, Dominik"],["dc.date.accessioned","2017-12-19T15:59:41Z"],["dc.date.available","2017-12-19T15:59:41Z"],["dc.date.issued","2017"],["dc.description.abstract","Silvicultural success in achieving, among other management goals, maximum productivity strongly depends on knowledge of the relationship between stand density and the resulting growth response of a stand. However, there are still controversial discussions whether wood production can be enhanced by silvicultural thinning or reaches its maximum in unmanaged forest stands if time plays no role. Moreover there is no universal answer whether structural diversity promotes or reduces productivity. In the present study we applied terrestrial laser scanning (TLS) to investigate the relationship between three-dimensional space filling, forest management intensity, productivity and conventional measures of structural diversity. We examined 35 beech-dominated forest plots along a gradient of management intensity in three regions of Germany. We found that space filling in leaf-on condition increased with management intensity, particularly in the shaded crown. Increased space filling in the shaded crown due to tree removals also resulted in higher stand productivity. We conclude that an increased space filling in the shaded canopy of managed European beech stands is responsible for the compensation of production losses in the upper canopy due to thinning activities. Conventional measures of structural diversity were not sensitive to the applied silvicultural activities. We also found no relationship between structural diversity described by conventional measures and stand productivity."],["dc.identifier.doi","10.1016/j.foreco.2017.03.036"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11510"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Canopy space filling rather than conventional measures of structural diversity explains productivity of beech stands"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2016Journal Article
    [["dc.bibliographiccitation.firstpage","212"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","223"],["dc.bibliographiccitation.volume","380"],["dc.contributor.author","Ehbrecht, Martin"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Juchheim, Julia"],["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Seidel, Dominik"],["dc.date.accessioned","2017-09-07T11:47:20Z"],["dc.date.available","2017-09-07T11:47:20Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1016/j.foreco.2016.09.003"],["dc.identifier.gro","3146736"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4532"],["dc.notes.status","final"],["dc.publisher","Elsevier BV"],["dc.relation.issn","0378-1127"],["dc.title","Effective number of layers: A new measure for quantifying three-dimensional stand structure based on sampling with terrestrial LiDAR"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2020Journal Article Research Paper
    [["dc.bibliographiccitation.journal","New Forests"],["dc.contributor.author","Rebola-Lichtenberg, Jessica"],["dc.contributor.author","Streit, Juliane"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Seidel, Dominik"],["dc.date.accessioned","2021-04-14T08:32:08Z"],["dc.date.available","2021-04-14T08:32:08Z"],["dc.date.issued","2020"],["dc.description.abstract","Short rotation coppices play an important role in providing biomass for energetic use. Mixing fast-growing tree species in short rotation coppices may show complementarity effects and increased yield. The aim of this study was to analyze the effect of species interaction in mixed short rotation coppices with fast-growing Populus spp.-hybrids and the N-fixing Robinia pseudoacacia. Four different Populus-hybrids (AF2, Fritzi Pauley, Hybride 275 and Max 1), planted alternately in pure and mixed stands with R. pseudoacacia were used for the analysis. Height and root collar diameter were measured once a year, over a period of four years (2014–2017). Additionally, in the third year, aboveground competition was surveyed with a terrestrial laser scanner and root biomass was analyzed to assess belowground competition. Soil nitrogen was also determined in order to verify enrichment properties of mixtures compared to pure stands. Populus-hybrids’ stem volume showed no significant differences between stand types in the first year after planting. In the second and third year, however, two Populus-hybrids (AF2 and Max 1) had a higher stem volume increment of up to 3.8 times than stem volume increment in pure stands. This may be related to the fact that soil nitrogen was 39% higher in the mixtures than in pure stands. However, in the 4th year after stand establishment, R. pseudoacacia’s crowns were so massive and broad, that this species was far more competitive than the Populus-hybrids. With the exception of P. ‘Fritzi Pauley’, which showed no significant differences between stand types, growth rates reversed for the other three Populus-hybrids. AF2, Max 1 and Hybride 275 showed up to 75% lower stem volume increment in mixtures compared to pure stands. We assume that, in spite of the initially observed facilitation between the species, the competition exerted by R. pseudoacacia started dominating after 4 years and began to surpass the benefits of facilitation."],["dc.identifier.doi","10.1007/s11056-020-09813-2"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83820"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1573-5095"],["dc.relation.haserratum","/handle/2/83295"],["dc.relation.issn","0169-4286"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.rights","CC BY 4.0"],["dc.title","From facilitation to competition: the effect of black locust (Robinia pseudoacacia L.) on the growth performance of four poplar-hybrids (Populus spp.) in mixed short rotation coppice"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2015Journal Article
    [["dc.bibliographiccitation.firstpage","735"],["dc.bibliographiccitation.journal","iForest - Biogeosciences and Forestry"],["dc.bibliographiccitation.lastpage","742"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Seidel, Dominik"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Gille, Malte"],["dc.contributor.author","Ammer, Christian"],["dc.date.accessioned","2018-01-02T10:50:44Z"],["dc.date.available","2018-01-02T10:50:44Z"],["dc.date.issued","2015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11524"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Physical dimensions of Fagus sylvatica crowns and their relationship to tree growth"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]
    Details
  • 2021Journal Article
    [["dc.bibliographiccitation.journal","European Journal of Forest Research"],["dc.contributor.author","Höwler, Kirsten"],["dc.contributor.author","Vor, Torsten"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Annighöfer, Peter"],["dc.contributor.author","Seidel, Dominik"],["dc.contributor.author","Ammer, Christian"],["dc.date.accessioned","2021-06-01T09:41:02Z"],["dc.date.available","2021-06-01T09:41:02Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract Research on mixed forests has mostly focused on tree growth and productivity, or resistance and resilience in changing climate conditions, but only rarely on the effects of tree species mixing on timber quality. In particular, it is still unclear whether the numerous positive effects of mixed forests on productivity and stability come at the expense of timber quality. In this study, we used photographs of sawn boards from 90 European beech ( Fagus sylvatica L.) trees of mixed and pure forest stands to analyze internal timber quality through the quality indicator knot surface that was quantitatively assessed using the software Datinf® Measure. We observed a decrease in knot surface with increasing distance from the pith as well as smaller values in the lower log sections. Regarding the influence of neighborhood species identity, we found only minor effects meaning that timber qualities in mixed stands of beech and Norway spruce ( Picea abies (L.) H. Karst.) tended to be slightly worse compared to pure beech stands."],["dc.identifier.doi","10.1007/s10342-021-01378-9"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84801"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1612-4677"],["dc.relation.issn","1612-4669"],["dc.title","Distribution of the timber quality attribute ‘knot surface’ in logs of Fagus sylvatica L. from pure and mixed forest stands"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2017Journal Article
    [["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Agricultural and Forest Meteorology"],["dc.bibliographiccitation.lastpage","9"],["dc.bibliographiccitation.volume","242"],["dc.contributor.author","Ehbrecht, Martin"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Seidel, Dominik"],["dc.date.accessioned","2017-12-19T13:32:12Z"],["dc.date.available","2017-12-19T13:32:12Z"],["dc.date.issued","2017"],["dc.description.abstract","Measures to describe stand structural complexity efficiently and objectively are increasingly demanded to understand the relationship between forest management, stand structure, biodiversity and ecosystem functioning. Here, we present an approach to quantify stand structural complexity based on fractal dimension derived from single terrestrial laser scans (TLS) that were made on 126 permanent forest research plots in Germany, representing major stand and management types. The newly developed SSC-index (SSCI) was positively correlated to conventional tree-based measures of stand structural complexity, tree size differentiation, diversity of tree diameters and random tree spacing patterns. Beyond that, it successfully differentiated between stand types of different main tree species and management systems. SSCI increased from low to high tree species diversity and explained microclimatic fluctuations better than conventional, tree-based measures. Given the high efficiency during data collection, TLS can be used to assess stand structural complexity for large sample sizes to provide an explanatory variable for the effects of forest management on biodiversity, productivity and ecosystem processes."],["dc.identifier.doi","10.1016/j.agrformet.2017.04.012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11502"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Quantifying stand structural complexity and its relationship with forest management, tree species diversity and microclimate"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2015Journal Article
    [["dc.bibliographiccitation.firstpage","735"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","iForest - Biogeosciences and Forestry"],["dc.bibliographiccitation.lastpage","742"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Seidel, D."],["dc.contributor.author","Schall, P."],["dc.contributor.author","Gille, M."],["dc.contributor.author","Ammer, C."],["dc.date.accessioned","2017-09-07T11:47:52Z"],["dc.date.available","2017-09-07T11:47:52Z"],["dc.date.issued","2015"],["dc.identifier.doi","10.3832/ifor1566-008"],["dc.identifier.gro","3146774"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4575"],["dc.notes.status","final"],["dc.relation.issn","1971-7458"],["dc.title","Relationship between tree growth and physical dimensions of Fagus sylvatica crowns assessed from terrestrial laser scanning"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2017Journal Article
    [["dc.bibliographiccitation.firstpage","25"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","AFZ, der Wald"],["dc.bibliographiccitation.lastpage","28"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Seidel, Dominik"],["dc.contributor.author","Ehbrecht, M."],["dc.contributor.author","Juchheim, J."],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Ammer, Christian"],["dc.date.accessioned","2017-12-19T16:16:05Z"],["dc.date.available","2017-12-19T16:16:05Z"],["dc.date.issued","2017"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11512"],["dc.language.iso","de"],["dc.notes.status","zu prüfen"],["dc.title","Terrestrisches Laserscanning erfasst komplexe Waldstrukturen"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]
    Details
  • 2013Journal Article
    [["dc.bibliographiccitation.firstpage","275"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","288"],["dc.bibliographiccitation.volume","310"],["dc.contributor.author","Metz, Jérôme"],["dc.contributor.author","Seidel, Dominik"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Scheffer, Dina"],["dc.contributor.author","Schulze, Ernst-Detlef"],["dc.contributor.author","Ammer, Christian"],["dc.date.accessioned","2017-09-07T11:47:22Z"],["dc.date.available","2017-09-07T11:47:22Z"],["dc.date.issued","2013"],["dc.description.abstract","Individual tree growth is controlled by numerous factors, but intertree competition is of special importance as it is the only parameter that can be managed by silvicultural measures. Many indices dealing with aboveground interference use geometric standard crown shapes to quantify the competitive strength of neighbors on the target tree. As such crowns do not realistically represent the spatial heterogeneity in the canopy, a terrestrial laser scanner was used to gain detailed information on crown characteristics which may be used for a more precise modeling of the relationship between competition and growth. We examined groups of 5 trees growing in three major geographic regions of Germany to investigate the effect of intra- and interspecific competition for light on basal area growth of target beech trees (Fagus sylvatica). A competition index based on individual crown shapes derived from TLS-data correlated better with target tree growth than an index using conventional geometric crown shape models. Both measures ascribed the highest competitive strength to intraspecific competition. In contrast to the valuable hardwoods for which a slightly lower crown competition was calculated, the conifer species Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) had considerably weaker competitive effects on beech. The growth response of the investigated target trees reflected the strength in competition (highest relative basal area growth of beech if mixed with Scots pine > Norway spruce > valuable hardwoods > intraspecific competition) even though the increment measurements with self-acting dendrometers covered only one vegetation period. Neighborhood diversity and target tree growth were correlated, indicating stronger effects of intra- compared to interspecific interference. The utilization of a terrestrial laser scanner provided insights into canopy structure of the competitive neighborhood that may enhance our understanding of competitive interactions."],["dc.identifier.doi","10.1016/j.foreco.2013.08.014"],["dc.identifier.gro","3146755"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4553"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0378-1127"],["dc.title","Crown modeling by terrestrial laser scanning as an approach to assess the effect of aboveground intra- and interspecific competition on tree growth"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]
    Details DOI
  • 2020Journal Article Erratum
    [["dc.bibliographiccitation.journal","New Forests"],["dc.contributor.author","Rebola‑Lichtenberg, Jessica"],["dc.contributor.author","Streit, Juliane"],["dc.contributor.author","Schall, Peter"],["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Seidel, Dominik"],["dc.date.accessioned","2021-04-14T08:30:35Z"],["dc.date.available","2021-04-14T08:30:35Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1007/s11056-020-09822-1"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83295"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1573-5095"],["dc.relation.iserratumof","/handle/2/83820"],["dc.relation.issn","0169-4286"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.title","Correction to: From facilitation to competition: the effect of black locust (Robinia pseudoacacia L.) on the growth performance of four poplar-hybrids (Populus spp.) in mixed short rotation coppice"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","erratum_ja"],["dspace.entity.type","Publication"]]
    Details DOI