干旱区生态环境知识资源中心(Arid): Retention and redistribution of biological legacies generate resource sinks in silvopastoral systems of Arid Chaco forests

Arid

DOI	10.1186/s13717-019-0180-x
	Retention and redistribution of biological legacies generate resource sinks in silvopastoral systems of Arid Chaco forests
	Cavallero, Laura; Ledesma, Marcela; Lopez, Dardo R.; Carranza, Carlos A.
通讯作者	Cavallero, L (corresponding author), Ctr Cient Tecnol CCT CONICET Cordoba, Cordoba, Argentina. ; Cavallero, L (corresponding author), Estn Forestal INTA Villa Dolores EEA Manfredi, Cordoba, Argentina.
来源期刊	ECOLOGICAL PROCESSES
EISSN	2192-1709
出版年	2019
卷号	8 期号:1
英文摘要	Background: Forests are used for multiple purposes worldwide, which often include timber harvest, firewood extraction and livestock raising. An excessive pressure on multipurpose systems may decrease soil cover, promoting soil erosion and causing the loss of other resources, as litter and seeds. Retention forestry practices can help to decrease or mitigate resource loss in the managed stands. Specifically, retaining and redistributing biological legacies (e.g. logs, branches, woody debris) at strategic locations can create sediment, litter, and seed-sinks in the silvopastoral systems. In addition, grazing management could increase or, even, decrease the success of this practice. In this study, we assessed the effect of branch barriers and grazing management on resource run-off/run-on processes in silvopastoral systems of Arid Chaco (Cordoba, Argentina). To do this, a 2-ha area was divided in two paddocks that were randomly assigned to different grazing managements: winter vs. continuous grazing. We randomly selected 22 water run-off paths in each paddock, and in the half of them, we build elongated branch piles. In each run-off path (with and without branch barriers), we recorded the amount of accumulated and lost sediment (during the rainy season), litter biomass, germinable seed bank, richness and cover of plant species, and richness and density of seedlings and saplings of woody species. Results: Branch barriers promoted sediment accumulation during the first and the second year of the study, depending on grazing management. The temporal and spatial scale of the effect of the branch barriers also depended on grazing management. Branch barriers also trapped litter and seeds, which may have increased the richness and density of seedlings and saplings of woody species. Conclusions: By intercepting the dominant flow of erosive agents, branch barriers trapped sediment, litter, and propagules of different species. A greater amount of sediment and litter would have improved microsite quality, favouring seed germination and seedling emergence of tree and shrub species, which are key to maintain and/or reconstitute the structure and composition of the forest community in the long term. Therefore, redistributing biological legacies at strategic locations can be a useful and cost-less retention forestry practice to be applied in multipurpose forest management and conservation strategies.
英文关键词	Branch barriers Ecosystem degradation Multipurpose forests Soil erosion Winter grazing
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000499129700001
WOS关键词	STRUCTURAL-FUNCTIONAL APPROACH ; SOIL-EROSION ; SEMIARID LANDSCAPES ; TRANSITION MODEL ; REHABILITATION ; VEGETATION ; STATE ; PATAGONIA ; REGENERATION ; RANGELANDS
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369855
作者单位	[Cavallero, Laura] Ctr Cient Tecnol CCT CONICET Cordoba, Cordoba, Argentina; [Cavallero, Laura; Ledesma, Marcela; Lopez, Dardo R.; Carranza, Carlos A.] Estn Forestal INTA Villa Dolores EEA Manfredi, Cordoba, Argentina
推荐引用方式 GB/T 7714	Cavallero, Laura,Ledesma, Marcela,Lopez, Dardo R.,et al. Retention and redistribution of biological legacies generate resource sinks in silvopastoral systems of Arid Chaco forests[J],2019,8(1).
APA	Cavallero, Laura,Ledesma, Marcela,Lopez, Dardo R.,&Carranza, Carlos A..(2019).Retention and redistribution of biological legacies generate resource sinks in silvopastoral systems of Arid Chaco forests.ECOLOGICAL PROCESSES,8(1).
MLA	Cavallero, Laura,et al."Retention and redistribution of biological legacies generate resource sinks in silvopastoral systems of Arid Chaco forests".ECOLOGICAL PROCESSES 8.1(2019).