DOI: 10.1016/j.foreco.2016.03.042
Scopus记录号: 2-s2.0-84962238537
论文题名: Some positive effects of the fragmentation of holm oak forests: Attenuation of water stress and enhancement of acorn production
作者: Morán-López T. ; Forner A. ; Flores-Rentería D. ; Díaz M. ; Valladares F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 370 起始页码: 22
结束页码: 30
语种: 英语
英文关键词: Acorn production
; Competition
; Forest fragmentation
; Holm oak
; Quercus ilex
; Water stress
Scopus关键词: Competition
; Crops
; Plants (botany)
; Acorn production
; Forest fragmentations
; Holm oak
; Quercus ilex
; Water stress
; Forestry
; climate conditions
; evergreen forest
; forest ecosystem
; habitat fragmentation
; hypothesis testing
; intraspecific competition
; Mediterranean environment
; physiological response
; seed
; seed production
; water stress
; Iberian Peninsula
; Quercus
; Quercus ilex
英文摘要: The effects of fragmentation on acorn production should be mediated by their impacts on the physiological status of oaks during seed development particularly in water-limited systems, such as Mediterranean forests. The creation of forests edges reduces tree-to-tree competition, which may in turn temper water shortage during summer and, as a result, enhance acorn production. To test these two hypotheses we monitored acorn production and predawn water potential during the 2012-2014 period in two holm oak (Quercus ilex) forest archipelagos of the Iberian Peninsula.Acorn production and fragmentation effects did not differ between localities despite of their contrasting climatic conditions (accumulated water deficit from April to August was a 60% higher in the South). In general, forest interiors showed a high proportion of non-producing trees (~50%) while trees at small forest fragments showed high acorn crops (acorn score ≥3, ~40% of studied trees). Our results confirmed the expectation that intraspecific competition in small forest fragments was reduced, which alleviated summer water shortage of the trees studied. This reduced water stress entailed an increased acorn production. Overall, our results show that local processes such as fragmentation may counteract climatic differences among localities and could even override the impacts of increased aridity on acorn crops. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64939
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biogeography and Global Change (BGC-MNCN), National Museum of Natural Science CSIC, C/Serrano 115 bis, Madrid, Spain
Recommended Citation:
Morán-López T.,Forner A.,Flores-Rentería D.,et al. Some positive effects of the fragmentation of holm oak forests: Attenuation of water stress and enhancement of acorn production[J]. Forest Ecology and Management,2016-01-01,370