干旱区生态环境知识资源中心(Arid): Aerial plant biomass and litterfall as local determinants of leaf litter and fine root decomposition in a semiarid ecosystem of the Neotropical region

Arid

DOI	10.1080/15324982.2019.1573387
	Aerial plant biomass and litterfall as local determinants of leaf litter and fine root decomposition in a semiarid ecosystem of the Neotropical region
	Oliveira, Uirande 1; Amado, Andre Megali 2,3; Vasconcellos, Alexandre 4
通讯作者	Vasconcellos, Alexandre
来源期刊	ARID LAND RESEARCH AND MANAGEMENT
ISSN	1532-4982
EISSN	1532-4990
出版年	2019
卷号	33 期号:4 页码:375-387
英文摘要	The rate of litter decomposition can vary within ecosystems that have high spatial heterogeneity, and many uncertainties remain regarding the abiotic and biotic factors that act as determinants of decomposition rates at small spatial scales. This study investigated the decomposition rates of leaves and fine roots of Croton sonderianus Mull. Arg., Poincianella pyramidalis Tul., and Aspidosperma pyrifolium Mart. over 12 months in a semiarid ecosystem in Brazil. Twelve biotic and abiotic factors were also evaluated as local determinants of decomposition rates. A 2000 x 500 m grid was delimited within which thirty 20 x 20 m plots were established. Two sets of litterbags were installed in each plot, one containing a mixture of leaves and the other a mixture of roots. The approximate mean lost mass was 90% for leaf material and 47% for roots after 10 and 12 months, respectively. Due to the litterbag incubation sites being distributed in a heterogeneous area, values for the intrinsic decay coefficient (k) (through month) varied widely from a minimum of 0.073 to a maximum of 0.458 for leaf litter and from 0.045 to 0.077 for roots. Variation in the decay coefficients for leaves and roots was significantly explained by aerial plant biomass and litterfall production, respectively; more open areas exhibited the highest rates of decomposition. Vegetation structure that favors the exposure of soil to solar radiation can influence the decomposition process, promoting an increase in leaf, and fine root decomposition rates at small spatial scales in tropical semiarid ecosystems.
英文关键词	Caatinga local scale Neotropical region seasonally dry tropical forests soil ecology
类型	Article
语种	英语
国家	Brazil
收录类别	SCI-E
WOS记录号	WOS:000487531600002
WOS关键词	NITROGEN DYNAMICS ; SOIL ; FOREST ; RAINFALL ; CAATINGA ; DESERT ; PHENOLOGY ; PHOTODEGRADATION ; AVAILABILITY ; SEASONALITY
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214400
作者单位	1.Univ Fed Rio Grande do Norte, CB, Postgrad Program Ecol PPG ECO, Natal, RN, Brazil; 2.Univ Fed Rio Grande do Norte, CB, Dept Oceanog & Limnol, Natal, RN, Brazil; 3.Univ Fed Juiz de Fora, Dept Biol, Juiz De Fora, MG, Brazil; 4.Univ Fed Paraiba, Dept Systemat & Ecol, Joao Pessoa, Paraiba, Brazil
推荐引用方式 GB/T 7714	Oliveira, Uirande,Amado, Andre Megali,Vasconcellos, Alexandre. Aerial plant biomass and litterfall as local determinants of leaf litter and fine root decomposition in a semiarid ecosystem of the Neotropical region[J],2019,33(4):375-387.
APA	Oliveira, Uirande,Amado, Andre Megali,&Vasconcellos, Alexandre.(2019).Aerial plant biomass and litterfall as local determinants of leaf litter and fine root decomposition in a semiarid ecosystem of the Neotropical region.ARID LAND RESEARCH AND MANAGEMENT,33(4),375-387.
MLA	Oliveira, Uirande,et al."Aerial plant biomass and litterfall as local determinants of leaf litter and fine root decomposition in a semiarid ecosystem of the Neotropical region".ARID LAND RESEARCH AND MANAGEMENT 33.4(2019):375-387.