气候变化领域集成服务门户(CCPortal): Microsites and early litter decomposition patterns in the soil and forest canopy at regional scale

CCPortal

DOI	10.1007/s10533-020-00705-3
	Microsites and early litter decomposition patterns in the soil and forest canopy at regional scale
	Aguilar-Cruz Y.; García-Franco J.G.; Zotz G.
发表日期	2020
ISSN	0168-2563
起始页码	15
结束页码	30
卷号	151 期号:1
英文摘要	Plant litter decomposition is a key ecological process that is mostly studied at the forest floor. However, decomposition generally starts in the canopy. In this study, we evaluated the effect of litter composition and climate on the initial phase of decomposition in the soil and two contrasting types of canopy microsites along an elevational gradient (0–2200 m a.s.l.). To this end, we incubated standard material composed by green (fast decomposing) and rooibos (slow decomposing) tea bags for three months. Tea bags were placed in soil (buried at 5 cm) and in the canopy at ca. 5 m above the ground in “micro-wetlands” (tank bromeliads) and dry crown microsites (branches). Along the elevational gradient, green tea decomposed faster than rooibos tea in all microsites and forests. Mass loss for both tea types was lowest on branches at all sites, except for green tea in a wet forest where decomposition did not significantly differ among microsites. In wet forests, decomposition did not differ between bromeliads and soil, while in a dry forest, decomposition was faster in bromeliads. We found that the effects of climatic variables [monthly average temperature (TEMP) and total precipitation (PREC) for the incubation months] on decomposition differed between microsites. Along the elevational gradient, the mass loss in soil was positively correlated with TEMP but not with PREC, whereas on branches, mass loss was negatively correlated with TEMP and positively correlated with PREC. Unlike on branches, mass loss in bromeliads slightly decreased with PREC and increased with TEMP. Our study shows that microsite conditions interact with climate (TEMP and PREC) leading to differences in the general decomposition patterns in the forest canopy. © 2020, The Author(s).
英文关键词	Arboreal soil; Bromeliads; Elevational gradient; Epiphytes; Tea bag index
语种	英语
scopus关键词	decomposition; elevation; forest canopy; forest floor; forest soil; litter; regional geography; soil analysis; tea; Aspalathus linearis
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153099
作者单位	Institut für Biologie und Umweltwissenschaften, AG Funktionelle Ökologie der Pflanzen, Carl von Ossietzky Universität Oldenburg, Postfach 2503, Oldenburg, 26111, Germany; Red Ecología Funcional, Instituto de Ecología AC, Xalapa, Veracruz 91000, Mexico
推荐引用方式 GB/T 7714	Aguilar-Cruz Y.,García-Franco J.G.,Zotz G.. Microsites and early litter decomposition patterns in the soil and forest canopy at regional scale[J],2020,151(1).
APA	Aguilar-Cruz Y.,García-Franco J.G.,&Zotz G..(2020).Microsites and early litter decomposition patterns in the soil and forest canopy at regional scale.Biogeochemistry,151(1).
MLA	Aguilar-Cruz Y.,et al."Microsites and early litter decomposition patterns in the soil and forest canopy at regional scale".Biogeochemistry 151.1(2020).