Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1365-2486.2012.02761.x |
Shifts in soil organic carbon for plantation and pasture establishment in native forests and grasslands of South America | |
Eclesia, Roxana P.1,5; Jobbagy, Esteban G.2; Jackson, Robert B.3; Biganzoli, Fernando4; Pineiro, Gervasio5 | |
通讯作者 | Eclesia, Roxana P. |
来源期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
出版年 | 2012 |
卷号 | 18期号:10页码:3237-3251 |
英文摘要 | The replacement of native vegetation by pastures or tree plantations is increasing worldwide. Contradictory effects of these land use transitions on the direction of changes in soil organic carbon (SOC) stocks, quality, and vertical distribution have been reported, which could be explained by the characteristics of the new or prior vegetation, time since vegetation replacement, and environmental conditions. We used a series of paired-field experiments and a literature synthesis to evaluate how these factors affect SOC contents in transitions between tree- and grass-dominated (grazed) ecosystems in South America. Both our field and literature approaches showed that SOC changes (020cm of depth) were independent of the initial native vegetation (forest, grassland, or savanna) but strongly dependent on the characteristics of the new vegetation (tree plantations or pastures), its age, and precipitation. Pasture establishment increased SOC contents across all our precipitation gradient and C gains were greater as pastures aged. In contrast, tree plantations increased SOC stocks in arid sites but decreased them in humid ones. However, SOC losses in humid sites were counterbalanced by the effect of plantation age, as plantations increased their SOC stocks as plantations aged. A multiple regression model including age and precipitation explained more than 50% (p<0.01) of SOC changes observed after sowing pastures or planting trees. The only clear shift observed in the vertical distribution of SOC occurred when pastures replaced native forests, with SOC gains in the surface soil but losses at greater depths. The changes in SOC stocks occurred mainly in the silt+clay soil size fraction (MAOM), while SOC stocks in labile (POM) fraction remained relatively constant. Our results can be considered in designing strategies to increase SOC storage and soil fertility and highlight the importance of precipitation, soil depth, and age in determining SOC changes across a range of environments and land-use transitions. |
英文关键词 | soil organic matter rainforests land use transitions vegetation replacement mean annual precipitation plantation age |
类型 | Article |
语种 | 英语 |
国家 | Argentina ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000308443800021 |
WOS关键词 | LAND-USE CHANGE ; PARTICLE-SIZE FRACTIONS ; NATURAL C-13 ABUNDANCE ; NET PRIMARY PRODUCTION ; EASTERN AMAZONIA ; MATTER DYNAMICS ; PINUS-RADIATA ; NITROGEN DYNAMICS ; AFFORESTATION ; STOCKS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/172657 |
作者单位 | 1.Estn Expt Agr INTA Cerro Azul, Misiones, Argentina; 2.Univ Nacl San Luis, CONICET, IMASL, Grp Estudios Ambientales, San Luis, Argentina; 3.Duke Univ, Nicholas Sch Environm, Ctr Global Change, Dept Biol, Durham, NC 27708 USA; 4.Univ Buenos Aires, Fac Agron, Dept Metodos Cuantitativos & Sistemas Informac, Buenos Aires, DF, Argentina; 5.Univ Buenos Aires, Fac Agron, IFEVA, CONICET, Buenos Aires, DF, Argentina |
推荐引用方式 GB/T 7714 | Eclesia, Roxana P.,Jobbagy, Esteban G.,Jackson, Robert B.,et al. Shifts in soil organic carbon for plantation and pasture establishment in native forests and grasslands of South America[J],2012,18(10):3237-3251. |
APA | Eclesia, Roxana P.,Jobbagy, Esteban G.,Jackson, Robert B.,Biganzoli, Fernando,&Pineiro, Gervasio.(2012).Shifts in soil organic carbon for plantation and pasture establishment in native forests and grasslands of South America.GLOBAL CHANGE BIOLOGY,18(10),3237-3251. |
MLA | Eclesia, Roxana P.,et al."Shifts in soil organic carbon for plantation and pasture establishment in native forests and grasslands of South America".GLOBAL CHANGE BIOLOGY 18.10(2012):3237-3251. |
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