Ammer, Christian

[["dc.bibliographiccitation.firstpage","721"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Tree Physiology"],["dc.bibliographiccitation.lastpage","728"],["dc.bibliographiccitation.volume","28"],["dc.contributor.author","Ammer, C."],["dc.contributor.author","Stimm, B."],["dc.contributor.author","Mosandl, R."],["dc.date.accessioned","2017-09-07T11:47:18Z"],["dc.date.available","2017-09-07T11:47:18Z"],["dc.date.issued","2008"],["dc.description.abstract","We used height growth data from a 7-year field experiment with European beech (Fagus sylvatica L.) seedlings to test the hypothesis that the effects of above- and belowground resources on height growth depend on seedling size and age. Photosynthetically active radiation (PAR) was determined by hemispheric photography, and estimates of fine root biomass of the overstory trees were used as an inverse proportional surrogate for belowground resource availability. For recently germinated seedlings growing under the canopy of Picea abies (L.) Karst., belowground resource availability affected height growth more than light. During subsequent stages of seedling development, apart from initial seedling size, PAR increasingly determined seedling growth. Besides initial size, seedling age determined the effects of above- and belowground resources on seedling height growth. In seedlings identical in initial size but differing in age, the increase in height growth with increasing PAR was greater in older seedlings than in younger seedlings. The ranking of seedling height by year showed that small differences in size at the end of the first growing season resulted in continuously increasing differences during the following years. Mortality data indicated that the chances of a seedling surviving intraspecific competition was strongly determined by its dominance ranking within the first 5 years after establishment."],["dc.identifier.doi","10.1093/treephys/28.5.721"],["dc.identifier.gro","3146719"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4514"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0829-318X"],["dc.title","Ontogenetic variation in the relative influence of light and belowground resources on European beech seedling growth"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.seriesnr","1"],["dc.contributor.author","El Kateb, H."],["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Schmerbeck, J."],["dc.contributor.author","Mosandl, R."],["dc.contributor.editor","Ammer, Christian"],["dc.contributor.editor","Weber, M."],["dc.contributor.editor","Mosandl, R."],["dc.date.accessioned","2018-01-02T14:02:29Z"],["dc.date.available","2018-01-02T14:02:29Z"],["dc.date.issued","2004"],["dc.format.extent","16"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11532"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.publisher","Zentrum Wald-Forst-Holz Weihenstephan"],["dc.relation.conference","Regenerating Mountain Forests"],["dc.relation.crisseries","Series of Conference Proceedings (Zentrum Wald-Forst-Holz Weihenstephan)"],["dc.relation.eventend","16 September 2004"],["dc.relation.eventlocation","Seeon"],["dc.relation.eventstart","12 September 2004"],["dc.relation.ispartof","Regenerating Mountain Forests"],["dc.relation.ispartofseries","Series of Conference Proceedings; 1"],["dc.title","Management options in mixed mountain forests of the Bavarian Alps"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Mosandl, R."],["dc.date.accessioned","2018-01-02T15:37:08Z"],["dc.date.available","2018-01-02T15:37:08Z"],["dc.date.issued","2000"],["dc.format.extent","79"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11535"],["dc.language.iso","de"],["dc.notes.status","final"],["dc.relation.conference","Jahrestagung 2000 der Sektion Waldbau des Verbandes Deutscher Forstlicher Forschungsanstalten"],["dc.relation.eventend","15 September 2000"],["dc.relation.eventlocation","Kliecken/Dessau"],["dc.relation.eventstart","13 September 2000"],["dc.relation.ispartof","Tagungsband der Sektion Waldbau des Verbandes Deutscher Forstlicher Forschungsanstalten zur Jahrestagung 2000"],["dc.title","Zum Einfluss des Altbestandes auf das Keimergebnis gesäter Bucheckern"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","121"],["dc.bibliographiccitation.lastpage","164"],["dc.bibliographiccitation.seriesnr","18"],["dc.contributor.author","Lüpke, B. von"],["dc.contributor.author","Ammer, C."],["dc.contributor.author","Braciamacchie, M."],["dc.contributor.author","Brunner, A."],["dc.contributor.author","Ceitel, J."],["dc.contributor.author","Collet, C."],["dc.contributor.author","Deuleuze, C."],["dc.contributor.author","Di Placido, J."],["dc.contributor.author","Huss, J."],["dc.contributor.author","Jankovic, J."],["dc.contributor.author","Kantor, P."],["dc.contributor.author","Larsen, J. B."],["dc.contributor.author","Lexer, M."],["dc.contributor.author","Löf, M."],["dc.contributor.author","Longauer, R."],["dc.contributor.author","Madsen, P."],["dc.contributor.author","Modrzynski, J."],["dc.contributor.author","Mosandl, R."],["dc.contributor.author","Pampe, A."],["dc.contributor.author","Pommerening, A."],["dc.contributor.author","Stefancik, J."],["dc.contributor.author","Tesar, V."],["dc.contributor.author","Thompson, R."],["dc.contributor.author","Zientarski, J."],["dc.contributor.editor","Spiecker, H."],["dc.contributor.editor","Hansen, J."],["dc.contributor.editor","Klimo, E."],["dc.contributor.editor","Skovsgaard, J. P."],["dc.contributor.editor","Sterba, H."],["dc.contributor.editor","Teuffel, K."],["dc.date.accessioned","2017-09-07T11:49:32Z"],["dc.date.available","2017-09-07T11:49:32Z"],["dc.date.issued","2004"],["dc.identifier.gro","3149703"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6395"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","Brill"],["dc.publisher.place","Leiden, Boston"],["dc.relation.crisseries","Research Report (European Forest Institute)"],["dc.relation.isbn","90-04-13728-9"],["dc.relation.ispartof","Norway spruce conversion – options and consequences"],["dc.relation.ispartofseries","European Forest Institute Research Report; 18"],["dc.title","Silvicultural strategies for conversion"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Ammer, Christian"],["dc.contributor.author","Mosandl, R."],["dc.contributor.author","El Kateb, H."],["dc.contributor.editor","Hasenauer, H."],["dc.date.accessioned","2018-01-02T16:00:17Z"],["dc.date.available","2018-01-02T16:00:17Z"],["dc.date.issued","2000"],["dc.format.extent","15"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/11536"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.publisher","Institute of Forest growth research, University of agricultural sciences"],["dc.publisher.place","Vienna, Austria"],["dc.relation.conference","International Conference on Forest Ecosystem Restoration"],["dc.relation.eventend","12 April 2000"],["dc.relation.eventlocation","Vienna"],["dc.relation.eventstart","10 April 2000"],["dc.relation.ispartof","Forest ecosystem restoration. Ecological and economical impacts of restoration processes in secondary coniferous forests. Proceedings of the international conference held in Vienna, Austria 10.-12. April, 2000"],["dc.title","Conversion of pure spruce (Picea abies [L.] Karst.) stands into mixed stands by direct-seeding of beech (Fagus sylvatica L.) - effects of canopy density and fine root biomass on seed germination"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","385"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Forestry"],["dc.bibliographiccitation.lastpage","395"],["dc.bibliographiccitation.volume","80"],["dc.contributor.author","Ammer, C."],["dc.contributor.author","Mosandl, R."],["dc.date.accessioned","2017-09-07T11:47:21Z"],["dc.date.available","2017-09-07T11:47:21Z"],["dc.date.issued","2007"],["dc.description.abstract","Direct seeding and planting of European beech (Fagus sylvatica L.) are two common techniques for the conversion of pure Norway spruce (Picea abies [L.] Karst.) stands into mixed stands. This study tested whether the growth of sown beech seedlings differs from that of planted seedlings of two stock types. Therefore at two experimental sites repeated measurements were made of height, stem and first order branch diameter on sown and planted seedlings over a period of nine years. The results showed that the growth responses of planted and sown seedlings to the environmental conditions below the canopy of overstorey Norway spruce were rather similar. No differences between planted and sown seedlings were found in their diameter and their estimated aboveground dry weight. For all three batches the ratio between the estimated branch dry weight and the estimated main stem dry weight (branch-shoot-ratio (BSR)) was increased with age. Due to intraspecific competition BSR was lowest for the sown seedlings irrespective of their age. Differences in growth dynamics between planted and sown seedlings were found. For example, differences in the height or the estimated aboveground woody dry weight between sown and planted seedlings at a given age were not constant. Height, diameter and estimated dry mass of the seedlings in relation to age could be modelled precisely by a second-order polynomial function in the hitherto studied period."],["dc.identifier.doi","10.1093/forestry/cpm023"],["dc.identifier.gro","3146743"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4540"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0015-752X"],["dc.title","Which grow better under the canopy of Norway spruce - planted or sown seedlings of European beech?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1208"],["dc.bibliographiccitation.journal","AFZ, der Wald"],["dc.bibliographiccitation.lastpage","1210"],["dc.bibliographiccitation.volume","56"],["dc.contributor.author","Ammer, C."],["dc.contributor.author","Mosandl, R."],["dc.contributor.author","El Kateb, H."],["dc.contributor.author","Stölting, R."],["dc.date.accessioned","2017-09-07T11:49:36Z"],["dc.date.available","2017-09-07T11:49:36Z"],["dc.date.issued","2001"],["dc.identifier.gro","3149723"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6417"],["dc.language.iso","de"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.title","Die Entwicklung von Buchensaaten im Vergleich zu Pflanzungen"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","60"],["dc.bibliographiccitation.journal","Allgemeine Forst- und Jagdzeitung"],["dc.bibliographiccitation.lastpage","67"],["dc.bibliographiccitation.volume","176"],["dc.contributor.author","Ammer, C."],["dc.contributor.author","Albrecht, L."],["dc.contributor.author","Borchert, H."],["dc.contributor.author","Brosinger, F."],["dc.contributor.author","Dittmar, C."],["dc.contributor.author","Elling, W."],["dc.contributor.author","Ewald, J."],["dc.contributor.author","Felbermeier, B."],["dc.contributor.author","Gilsa Von, H."],["dc.contributor.author","Huss, J."],["dc.contributor.author","Kenk, G."],["dc.contributor.author","Kölling, C."],["dc.contributor.author","Kohnle, U."],["dc.contributor.author","Meyer, P."],["dc.contributor.author","Mosandl, R."],["dc.contributor.author","Moosmayer, H. - U."],["dc.contributor.author","Palmer, S."],["dc.contributor.author","Reif, A."],["dc.contributor.author","Rehfuess, K. - E."],["dc.contributor.author","Stimm, B."],["dc.date.accessioned","2017-09-07T11:49:32Z"],["dc.date.available","2017-09-07T11:49:32Z"],["dc.date.issued","2005"],["dc.identifier.gro","3149699"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6391"],["dc.language.iso","de"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.title","Zur Zukunft der Buche (Fagus sylvatica L.) in Mitteleuropa - kritische Anmerkungen zu einem Beitrag von Rennenberg et al. (2004)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","59"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","72"],["dc.bibliographiccitation.volume","159"],["dc.contributor.author","Ammer, C."],["dc.contributor.author","Mosandl, R."],["dc.contributor.author","Kateb, H. E."],["dc.date.accessioned","2017-09-07T11:47:19Z"],["dc.date.available","2017-09-07T11:47:19Z"],["dc.date.issued","2002"],["dc.description.abstract","Direct seeding of deciduous trees below the canopy of conifer stands has proven to be a very economical method for converting pure stands into mixed stands. However, many direct seedings of beech seeds provided unsatisfactory results without a clear explanation for this lack of success. In order to identify the main factors determining seed germination under the canopy of pure Norway spruce stands, three different treatments of direct seeding were tested. These treatments were: (i) direct seeding without additional measure (control), (ii) direct seeding and liming, and (iii) direct seeding covered with beech leaf litter. The experiment consists of two stands. Direct seeding was carried out on six plots per treatment and stand. Each plot includes 81 sample units of 0.5 m2 upon each of which 15 g of seeds were sown. The germinative capacity of the seeds was pre-determined (68%). Germination of the seeds was recorded repeatedly from May to September 1997. On the related sample units canopy density was measured and fine root biomass of the overstorey trees was estimated. There was a significant difference in seedling number between the two stands. The number of seedlings did not increase by liming (coincident with seeding). In contrast, the covering of seeds with leaf litter caused a remarkable and significant increase in the number of germinated seeds. As ANCOVA showed, models including canopy density or estimated fine root biomass of the overstorey trees explained 72 and 52% of the variation in mean seedling number per plot. As canopy density as well as estimated fine root biomass determine the water content of the soil, it can be assumed that the germination of beech seeds originating from direct seedings under the canopy of pure spruce stands depends to a great extent on soil moisture at the time when the direct seeding is carried out, as well as the weeks following seeding. For this reason, direct seedings in very dense stands are not recommended against the background of this study."],["dc.identifier.doi","10.1016/s0378-1127(01)00710-1"],["dc.identifier.gro","3146717"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4512"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0378-1127"],["dc.title","Direct seeding of beech (Fagus sylvatica L.) in Norway spruce (Picea abies [L.] Karst.) stands—effects of canopy density and fine root biomass on seed germination"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","62"],["dc.bibliographiccitation.lastpage","83"],["dc.bibliographiccitation.seriesnr","192"],["dc.contributor.author","Quiroz-Marchant, I."],["dc.contributor.author","Ammer, C."],["dc.contributor.author","Mosandl, R."],["dc.contributor.editor","Mosandl, R."],["dc.contributor.editor","El Kateb, H."],["dc.contributor.editor","Stimm, B."],["dc.date.accessioned","2017-09-07T11:49:32Z"],["dc.date.available","2017-09-07T11:49:32Z"],["dc.date.issued","2003"],["dc.identifier.gro","3149701"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6393"],["dc.language.iso","de"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","Frank"],["dc.publisher.place","München"],["dc.relation.crisseries","Forstliche Forschungsberichte München"],["dc.relation.isbn","3-933506-23-9"],["dc.relation.ispartof","Waldbau-weltweit. Beiträge zur internationalen Waldbauforschung"],["dc.relation.ispartofseries","Forstliche Forschungsberichte München; 192"],["dc.title","Untersuchungen zur waldbaulichen Behandlung von Nothofagus-Naturwäldern in den südlichen chilenischen Anden"],["dc.type","book_chapter"],["dc.type.internalPublication","no"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]