气候变化领域集成服务门户(CCPortal): Not so stressful after all: Epiphytic individuals of accidental epiphytes experience more favourable abiotic conditions than terrestrial conspecifics

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DOI	10.1016/j.foreco.2020.118529
	Not so stressful after all: Epiphytic individuals of accidental epiphytes experience more favourable abiotic conditions than terrestrial conspecifics
	Hoeber V.; Zotz G.
发表日期	2021
ISSN	0378-1127
卷号	479
英文摘要	Vascular epiphytes are mainly associated with tropical and subtropical forest ecosystems. However, the frequent occurrence of accidental epiphytes in temperate forests proves that epiphytic growth of vascular plants is possible in tree crowns at these latitudes. Comparing the abiotic conditions of epiphytic and terrestrial microhabitats in conjunction with intraspecific differences in functional traits of the inhabiting plants, we identified limitations to vascular epiphytism in the study area in a Central European low mountain range. We determined light availability, winter temperatures, soil moisture, nutrient concentrations, and pH of arboreal soil in crotches of broad-leaved trees and in the immediate vicinity of each tree on the ground. Similarly, we quantified total plant water content, relative foliar chlorophyll content, specific leaf area (SLA), leaf dry matter content (LDMC), root-mass fraction, and aboveground nutrient concentrations of 110 pairs of epiphytic and terrestrial conspecifics. Water and nutrient availability were generally high in crotches filled with arboreal soil, suggesting better growth conditions than on the ground. A trophic advantage of epiphytic individuals over terrestrial conspecifics can be deduced from higher plant nutrient concentrations, higher SLA, and lower LDMC. Advantageous growth conditions might even result in higher growth rates and higher fitness of epiphytic individuals. Our findings highlight that vascular epiphytism in the study area is not necessarily limited by abiotic conditions but at least partly by the availability of old and structurally diverse trees providing suitable microhabitats. Accordingly, management actions in these secondary forest ecosystems should incorporate the preservation of old and large deciduous trees in order to sustain arboreal microhabitats and the associated biota. © 2020 Elsevier B.V.
英文关键词	Accidental epiphytes; Arboreal soil; Canopy humus; Functional traits; Humus epiphytes; Intraspecific variation
语种	英语
scopus关键词	Ecosystems; Nutrients; Plants (botany); Soil moisture; Tropics; Abiotic conditions; Intra-specific differences; Light availability; Nutrient availability; Nutrient concentrations; Plant water content; Specific leaf area; Subtropical forests; Forestry; abiotic factor; conspecific; epiphyte; forest ecosystem; growth; intraspecific interaction; leaf area index; microhabitat; mountain region; nutrient availability; secondary forest; terrestrial environment; vascular plant; Area; Ecosystems; Forestry; Growth; Nutrients; Soil; Trees; Tropics; Central Europe; Embryophyta; Tracheophyta
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154928
作者单位	Institute of Biology and Environmental Sciences, University of Oldenburg, Oldenburg, 26129, Germany
推荐引用方式 GB/T 7714	Hoeber V.,Zotz G.. Not so stressful after all: Epiphytic individuals of accidental epiphytes experience more favourable abiotic conditions than terrestrial conspecifics[J],2021,479.
APA	Hoeber V.,&Zotz G..(2021).Not so stressful after all: Epiphytic individuals of accidental epiphytes experience more favourable abiotic conditions than terrestrial conspecifics.Forest Ecology and Management,479.
MLA	Hoeber V.,et al."Not so stressful after all: Epiphytic individuals of accidental epiphytes experience more favourable abiotic conditions than terrestrial conspecifics".Forest Ecology and Management 479(2021).