Schwendenmann, Luitgard

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Ecohydrology"],["dc.bibliographiccitation.lastpage","12"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.contributor.author","Pendall, Elise"],["dc.contributor.author","Sanchez-Bragado, Rut"],["dc.contributor.author","Kunert, Norbert"],["dc.contributor.author","Hoelscher, Dirk"],["dc.date.accessioned","2017-09-07T11:45:40Z"],["dc.date.available","2017-09-07T11:45:40Z"],["dc.date.issued","2014"],["dc.description.abstract","We studied tree water uptake patterns, tested for complementary water use among species and analysed controlling factors in a tropical tree diversity experiment. The water uptake depth of five species was investigated across seasons and diversity levels using the natural abundance of water isotopes (δ2H, δ18O) and modelling. Three distinct water acquisition strategies were found for trees growing in monocultures during the dry season: strong reliance (>70%) on soil water from the upper layer (0–30 cm) (Cedrela odorata), uptake from the upper and deeper layers (>30 cm) in equal proportions (Hura crepitans, Anacardium excelsum and Luehea seemannii) and water uptake predominately from deeper layers (Tabebuia rosea). Seasonal shifts in water uptake were most pronounced for T. rosea. The water uptake pattern of a given species was independent of the diversity level underlining the importance of species identity and species characteristics in spatial and temporal tree water use. Statistics did not show a significant effect of diversity on source water fractions, but we did see some evidence for complementary water resource utilization in mixed species plots, especially in the dry season. Our results also demonstrated that the depth of soil water uptake was related to leaf phenology and tree transpiration rates. A higher proportion of water obtained from deeper soil layers was associated with a high percentage foliage cover in the dry season, which explained the higher transpiration rates."],["dc.identifier.doi","10.1002/eco.1479"],["dc.identifier.gro","3149069"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5714"],["dc.language.iso","en"],["dc.notes.intern","Hoelscher Crossref import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1936-0584"],["dc.title","Tree water uptake in a tropical plantation varying in tree diversity: interspecific differences, seasonal shifts and complementarity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","135"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Applied Ecology"],["dc.bibliographiccitation.lastpage","144"],["dc.bibliographiccitation.volume","49"],["dc.contributor.author","Kunert, Norbert"],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.contributor.author","Potvin, Catherine"],["dc.contributor.author","Hölscher, Dirk"],["dc.date.accessioned","2017-09-07T11:45:43Z"],["dc.date.available","2017-09-07T11:45:43Z"],["dc.date.issued","2012"],["dc.identifier.doi","10.1111/j.1365-2664.2011.02065.x"],["dc.identifier.gro","3149065"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5709"],["dc.language.iso","en"],["dc.notes.intern","Hoelscher Crossref import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0021-8901"],["dc.title","Tree diversity enhances tree transpiration in a Panamanian forest plantation"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","411"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Agricultural and Forest Meteorology"],["dc.bibliographiccitation.lastpage","419"],["dc.bibliographiccitation.volume","150"],["dc.contributor.author","Kunert, Norbert"],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.contributor.author","Hölscher, Dirk"],["dc.date.accessioned","2017-09-07T11:45:35Z"],["dc.date.available","2017-09-07T11:45:35Z"],["dc.date.issued","2010"],["dc.description.abstract","We studied nine tree species with different leaf phenologies growing in monospecific plantations in the watershed of the Panama Canal. The annual rainfall in the region averages 2350 mm with a pronounced dry season from January to March. The atmospheric evaporative demand is usually higher in the dry season compared to the wet season. Our objectives were to (1) compare water use characteristics among the tree species, (2) analyze the response of sap flux density to changes in environmental conditions, and (3) estimate seasonal and annual tree water use and transpiration rates. Tree sap flux was monitored using the heat dissipation technique according to Granier. Under full foliage, maximum sap flux densities varied more than twofold among species. Time of leaf shedding and duration of leafless periods also varied strongly among species. However, the relationship between percentage of foliage and normalized maximum sap flux densities can be described by a universal non-species-specific function. Species means of maximum transpiration rates on a basis of projected crown area varied more than twofold (1.2–2.8 mm day−1). Transpiration rates between the dry and wet season differed for six of the nine species. Three species (Acacia mangium, Anacardium excelsum, and Gmelina arborea) showed enhanced transpiration in the dry season with dry to wet season ratios between 1.4 and 2.1. In contrast, the dry to wet season ratio of Cedrela odorata, Hura crepitans, and Tectona grandis ranged from 0.4 to 0.8. The results suggest that tree species choice can substantially influence water resource use in plantation forestry under such seasonal climatic conditions."],["dc.identifier.doi","10.1016/j.agrformet.2010.01.006"],["dc.identifier.gro","3149051"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5694"],["dc.language.iso","en"],["dc.notes.intern","Hoelscher Crossref import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0168-1923"],["dc.title","Seasonal dynamics of tree sap flux and water use in nine species in Panamanian forest plantations"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","293"],["dc.bibliographiccitation.lastpage","308"],["dc.contributor.author","Dierick, Diego"],["dc.contributor.author","Kunert, Norbert"],["dc.contributor.author","Köhler, Michael"],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.contributor.author","Hölscher, Dirk"],["dc.contributor.editor","Tscharntke, Teja"],["dc.contributor.editor","Leuschner, Christoph"],["dc.contributor.editor","Veldkamp, Edzo"],["dc.contributor.editor","Faust, Heiko"],["dc.contributor.editor","Guhardja, Edi"],["dc.contributor.editor","Bidin, Arifuddin"],["dc.date.accessioned","2017-09-07T11:45:41Z"],["dc.date.available","2017-09-07T11:45:41Z"],["dc.date.issued","2010"],["dc.description.abstract","In the tropics, reforestations and agroforestry become increasingly important and may help mitigate climate change. However, high water use by trees may deplete water resources for associated crops or other purposes. Choice of tree species might reduce water use rates to acceptable levels, but available information on species-specific water use characteristics is scarce. We addressed the following questions: 1) do species differ in xylem sap flux response to fluctuating environmental conditions, 2) are there species-specific differences in quantities of water used, and specifically 3) do universal rules relating tree size to water use apply? This chapter combines data on tree sap flux and water use gathered in Indonesia, Panama and the Philippines. These studies applied the same methods and were conducted in recently established stands (5–12 years old when studied) characterised by small diameter trees and relatively simple stand structure. We analyse data from more than 100 trees belonging to 17 species using a simple sap flux model. Model application suggested species-specific differences in parameters such as maximal sap flux velocity and responses to radiation and vapour pressure deficit. With respect to the quantity of water used per tree, we observed a strong correlation between tree diameter and tree water use, which confirms earlier publications. However, e.g. in the stands in the Philippines where tree diameter explained 65% of observed variation, some species clearly followed distinct trajectories. For a given diameter, up to twofold differences in tree water use among species were observed. Our findings thus support the idea that species selection can be used to control tree water use of future reforestations and within agroforestry Teja Tscharntke, Christoph Leuschner, Edzo Veldkamp, Heiko Faust, Edi Guhardja, Arifuddin Bidin (editors): Tropical rainforests and agroforests under global change: Ecological and socio-economic valuations. Springer Berlin 2010, pp systems. This will be especially relevant in areas where water resources are limited already or where climate scenarios predict decreasing precipitation."],["dc.identifier.doi","10.1007/978-3-642-00493-3_13"],["dc.identifier.gro","3149070"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5715"],["dc.language.iso","en"],["dc.notes.intern","Hoelscher Crossref import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","Springer"],["dc.publisher.place","Berlin, Heidelberg"],["dc.relation.doi","10.1007/978-3-642-00493-3"],["dc.relation.isbn","978-3-642-00492-6"],["dc.relation.ispartof","Tropical Rainforests and Agroforests under Global Change"],["dc.relation.issn","1863-5520"],["dc.title","Comparison of tree water use characteristics in reforestation and agroforestry stands across the tropics"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]