globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2015.11.018
Scopus记录号: 2-s2.0-84947606114
论文题名:
Physiological significance of forest tree defoliation: Results from a survey in a mixed forest in Tuscany (central Italy)
作者: Pollastrini M.; Feducci M.; Bonal D.; Fotelli M.; Gessler A.; Grossiord C.; Guyot V.; Jactel H.; Nguyen D.; Radoglou K.; Bussotti F.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2016
卷: 361
起始页码: 170
结束页码: 178
语种: 英语
英文关键词: Crown condition ; Defoliation ; Foliar analysis ; FunDivEUROPE ; Mixed forests ; Tree diversity
Scopus关键词: Carbon ; Chlorophyll ; Fluorescence ; Nitrogen ; Physiology ; Plants (botany) ; Surveys ; Crown conditions ; Defoliation ; Foliar analysis ; FunDivEUROPE ; Mixed forests ; Tree diversity ; Forestry ; canopy architecture ; deciduous forest ; environmental conditions ; health status ; herb ; mixed forest ; nutrient availability ; photosynthesis ; physiological response ; population structure ; Italy ; Tuscany ; Castanea sativa ; Hexapoda ; Ostrya carpinifolia ; Quercus cerris ; Quercus ilex ; Quercus petraea
英文摘要: A survey of tree crown defoliation and leaf physiological traits (chlorophyll a fluorescence, nitrogen content, and stable carbon isotope composition) was carried out in the thermophilous deciduous forests in Tuscany (central Italy). In contrast to large scale surveys, where variation in defoliation can be associated with the change in environmental conditions, in a limited homogenous area the defoliation of co-existing tree species may have different significance and depends on the interaction between the characteristics of each individual species with biotic stress and environmental conditions. The survey included measurements of structural and vegetational characteristics of the forest stands, such as Leaf Area Index (LAI), basal area and tree diversity, which is expressed as the Shannon diversity index. The five tree species studied (Castanea sativa, Quercus cerris, Quercus ilex, Quercus petraea and Ostrya carpinifolia) showed species-specific crown conditions and physiological features relative to stand structure and diversity. The shape of the crowns and their area (LAI) affected forest defoliation. Tree diversity reduced defoliation in C. sativa, which was the tree species most affected by defoliation, and likewise for Q. ilex. Chlorophyll a fluorescence parameters showed lower photosynthetic efficiency in defoliated C. sativa, O. carpinifolia and Q. petraea trees. Similarly, foliar nitrogen content decreased in defoliated C. sativa and O. carpinifolia trees, whereas δ13C was higher in defoliated C. sativa. These responses may be related to the health status of C. sativa, since it was subjected to pathogen damages and insect attacks. In contrast, the mast year in O. carpinifolia may have diverted the nutrient resources from leaves to fruits, and consequently explaining the physiological effects on the tree crown. These results suggest that the combined analysis of defoliation with foliar features and stand characteristics can provide insights into tree health and vitality. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65139
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Agri-Food Production and Environmental Science, Section of Soil and Plant Science, University of Firenze, Italy; Department of Agri-Food Production and Environmental Science, Section of Plant Pathology and Entomology, University of Firenze, Italy; INRA, UMR EEF, Champenoux, France; Forest Research Institute of Thessaloniki, Greek Agricultural Organization-Dimitra, Greece; Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Long-term Forest Ecosystem Research (LWF), Birmensdorf, Switzerland; Earth and Environmental Sciences Division, MS-J495, Los Alamos National Lab, Los Alamos, NM, United States; UMR Biodiversité Gènes et Ecosystèmes INRA, CESTAS Cedex, France; UMR 1201 Dynafor INRA-INPT/ENSAT, Castanet Tolosan Cedex, France; Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Box 7026, Uppsala, Sweden; Department of Forestry and Management of Environment and Natural Resources, Democritus University of Thrace, Greece

Recommended Citation:
Pollastrini M.,Feducci M.,Bonal D.,et al. Physiological significance of forest tree defoliation: Results from a survey in a mixed forest in Tuscany (central Italy)[J]. Forest Ecology and Management,2016-01-01,361
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