气候变化领域集成服务门户(CCPortal): In-situ local litter decomposition was mainly microbial and differed between pastures and mature forests but not along early succession in a tropical dry forest ecosystem

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DOI	10.1016/j.foreco.2020.118636
	In-situ local litter decomposition was mainly microbial and differed between pastures and mature forests but not along early succession in a tropical dry forest ecosystem
	Gavito M.E.; Cohen-Salgado D.; Noguez A.M.; Vega-Peña E.V.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	Organic matter decomposition in tropical dry forest ecosystems is poorly understood, especially under the diversity of land covers resulting from human activities and increasing predominance of secondary vegetation over primary vegetation. We hypothesized that 1) litter quality decreases progressively from pastures to successional forests and to mature forests as a result of increasing recalcitrant materials with increasing tree cover, 2) as a consequence of those litter quality differences, decomposition rates also decrease progressively from pastures to successional forests and to mature forests, and 3) bacteria dominate the microbial community in the first part of the process, consuming the most labile materials; fungi dominate afterwards, consuming the recalcitrant material; meso- and small macrofauna access to bags increases decomposition. Bags made from mesh of two opening sizes and containing bulk litter from the site were placed in each site when the rainy season started and removed after 1, 2, 4 and 9 months. Mass loss curves were remarkably similar in all sites despite being composed of different litter materials and exposed to different local environmental conditions in each site. Local litter in-situ decomposition showed a rapid decomposition phase during the first two months, in which close to half of the initial mass was lost, and virtually no further decomposition in the subsequent seven months. Half-life of the litter was approximately 3 months and the shape of the mass loss curves indicated the local bulk litters were rich in labile materials. Differences in litter quality were minor, were weakly related to decomposition and had no relation to the successional age of the sites. Decomposition rates were significantly higher as hypothesized, in pastures than in mature forests and intermediate in successional sites although the differences observed were of low magnitude. During the rapid decomposition period the fungi:bacteria abundance ratio decreased from four in initial bulk litters to one after the first two months. As predicted, bacteria proliferated in the initial stages whereas fungi decreased but we were not able to measure if fungi dominated the microbial community in the second, slow period. Allowing access of meso- and small macro-fauna to litter bags did not increase decomposition. These results suggest that decomposition is a resilient function in this ecosystem, as it is only slightly reduced in pastures and recovers rapidly through early succession. © 2020 Elsevier B.V.
英文关键词	Bacteria; Decomposition; Fungi; Land cover change; Tropical dry forest
语种	英语
scopus关键词	Bacteria; Ecosystems; Fungi; Tropics; Vegetation; Vehicles; Environmental conditions; Litter decomposition; Microbial communities; Organic matter decomposition; Rapid decomposition; Resilient function; Secondary vegetation; Tropical dry forest; Forestry; decomposition; dry forest; environmental conditions; forest; forest ecosystem; land cover; leaf litter; microbial activity; microbial community; pasture; soil organic matter; succession; tropical forest; Bacteria; Ecosystems; Fungi; Plants; Tropics; Vehicles; Fungi
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/154860
作者单位	Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México-campus Morelia, Mexico, Apartado postal 27-3 Santa María de Guido CP 58090 Morelia, Michoacán, Mexico
推荐引用方式 GB/T 7714	Gavito M.E.,Cohen-Salgado D.,Noguez A.M.,et al. In-situ local litter decomposition was mainly microbial and differed between pastures and mature forests but not along early succession in a tropical dry forest ecosystem[J],2021,480.
APA	Gavito M.E.,Cohen-Salgado D.,Noguez A.M.,&Vega-Peña E.V..(2021).In-situ local litter decomposition was mainly microbial and differed between pastures and mature forests but not along early succession in a tropical dry forest ecosystem.Forest Ecology and Management,480.
MLA	Gavito M.E.,et al."In-situ local litter decomposition was mainly microbial and differed between pastures and mature forests but not along early succession in a tropical dry forest ecosystem".Forest Ecology and Management 480(2021).