Impacts of woody invasive alien plant species on rural livelihood: Generalized propensity score evidence from Prosopis spp. invasion in Afar Region in Ethiopia

被引：15

作者：

Bekele K. ^{[1
]}

Haji J. ^{[1
]}

Legesse B. ^{[1
]}

Shiferaw H. ^{[2
]}

Schaffner U. ^{[3
]}

机构：

[1] School of Agricultural Economics and Agribusiness, Haramaya University, P.O. Box 50, Dire Dawa

[2] Water and Land Resource Centre, Addis Ababa University, Ethiopia, P.O. Box 3880, Addis Ababa

[3] CABI Switzerland, Rue des Grillons 1, Delémont

来源：

Pastoralism | / 8卷 / 1期

关键词：

Consumption expenditure; Dose-response function; Generalized propensity score; Invasive alien species; Prosopis;

D O I：

10.1186/s13570-018-0124-6

中图分类号：

学科分类号：

摘要：

This study applied a generalized propensity score method to evaluate the impact of Prosopis invasion on Afar pastoralist and agro-pastoralist households’ annual per capita consumption expenditure, as a proxy of rural livelihoods. The analysis was based on cross-sectional survey data collected in mid-2016 from 250 households in the Afar National Regional State in Ethiopia. The method was applied to match households with similar covariates with different Prosopis invasion levels. The method was effective in teasing out non-linear causal relationships between Prosopis invasion dose and household per capita consumption expenditure. Average dose-response or impact function was obtained by estimating average annual household per capita consumption expenditure at different levels of Prosopis invasion. Initially, the plants’ impact was positive, but turned negative after an optimum invasion dose. The optimal invasion dose of Prosopis was found to be 22.23%. The corresponding optimum level of annual household per capita consumption expenditure was found to be 4,500.50 Ethiopian Birr (USD 198). The results suggest that to maximize the benefits of Prosopis and minimize its adverse effects on the livelihoods of the pastoral and agro-pastoral communities, diverse management strategies that take into account not only the intensity of invasion, but also patterns of dryland economy should be implemented. © 2018, The Author(s).

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