气候变化领域集成服务门户(CCPortal): Swidden fallow management to increase landscape-level Brazil nut productivity

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DOI	10.1016/j.foreco.2020.118019
	Swidden fallow management to increase landscape-level Brazil nut productivity
	Bongiolo E.S.; Kainer K.A.; Cropper W.; Staudhammer C.L.; Wadt L.H.D.O.
发表日期	2020
ISSN	0378-1127
卷号	464
英文摘要	Brazil nut (Bertholletia excelsa Bonpl.) is considered the cornerstone non-timber species of Amazonian conservation. Nuts (or seeds) of this massive tree are harvested by local people living in and near old growth forests, supporting local livelihoods and regional economies. Secondary forests, however, particularly plots previously used for agriculture (swidden fallows), present better B. excelsa seedling and sapling recruitment than mature forest. This study examines the extent to which forest residents could increase nut productivity by allowing their fallows to grow into Brazil nut rich forests. We conducted B. excelsa inventories in the Brazilian state of Acre in abandoned swidden fallows of different ages. We also conducted interviews to determine landowner perspectives on the fallow potential for increasing nut production. An individual-based model, based on in-situ inventories and primary and secondary datasets from prior fieldwork, simulated growth, survivorship and production from the 250 inventoried trees in 18 fallows of varying sizes (from 0.41 to 4.18 ha) and different regrowth stages (12 to 60 years old). These simulation model predictions showed that after 10 years, 2.4% of existing trees would be productive, with an average of 68.6 ± 21.5 fruits per reproductively mature tree in the four fallows that most quickly yielded productive trees. By the final projected time interval (40 years), predictions suggest all fallows will produce fruits with cumulative production averaging 1475 ± 359 fruits ha−1, suggesting an increase in landowner income of US$55.1 ± 13.4 per hectare of fallow. Our simulation model is the first to explore fruit productivity of Brazil nut in secondary forest. It likely underpredicts B. excelsa growth and nut production, considering that swidden fallows provide better resource availability than the forest-derived datasets we used to construct the model equations. In conclusion, our findings support previous research that suggests that higher B. excelsa recruitment rates observed in abandoned swidden fallows could indeed translate into greater adult densities and thus potentially, higher nut production – a conclusion mirrored by most participant landowners. © 2020 Elsevier B.V.
关键词	Conservation Fruits Productivity Cumulative production Individual based model Old-growth forest Recruitment rates Regional economy Resource availability Secondary forests Simulation model Forestry forest management landowner landscape resource availability shifting cultivation Brazil Conservation Forestry Fruits Increments Production Productivity Trees Acre Bertholletia excelsa
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132873
推荐引用方式 GB/T 7714	Bongiolo E.S.,Kainer K.A.,Cropper W.,et al. Swidden fallow management to increase landscape-level Brazil nut productivity[J]. Forest Ecology and Management,2020,464.
APA	Bongiolo E.S.,Kainer K.A.,Cropper W.,Staudhammer C.L.,&Wadt L.H.D.O..(2020).Swidden fallow management to increase landscape-level Brazil nut productivity.,464.
MLA	Bongiolo E.S.,et al."Swidden fallow management to increase landscape-level Brazil nut productivity".464(2020).