Grassland afforestation impact on primary productivity a remote sensing approach
Question: How is the magnitude and seasonality of carbon uptake affected by the replacement of native grasslands by eucalyptus plantations? Location: Río de la Plata Grasslands in Argentina and Uruguay. Methods: A total of 115 paired sites of fast-growing Eucalyptus grandis plantations and adjacent...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2013vassallo.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 245 | 1 | 0 | |a Grassland afforestation impact on primary productivity |b a remote sensing approach |
| 520 | |a Question: How is the magnitude and seasonality of carbon uptake affected by the replacement of native grasslands by eucalyptus plantations? Location: Río de la Plata Grasslands in Argentina and Uruguay. Methods: A total of 115 paired sites of fast-growing Eucalyptus grandis plantations and adjacent grasslands were used to characterize the magnitude and seasonality of [1] radiation interception by canopies and [2] above-ground net primary productivity based on a time series of MODIS-derived normalized difference vegetation index [NDVI]. The response of NDVI to precipitation was explored across temporal scales. Results: NDVI in afforested vs. grassland plots presented higher annual averages [1.3-fold], lower seasonal ranges [average relative range of 0.11 vs. 0.29] and delayed growing seasons [2-month shift]. Temporally, NDVI was positively associated with precipitation input, showing a correlation with longer periods of precipitation accumulation in tree plantations compared to grasslands [greather than 7 vs. 2-3 months]. Estimated average annual above-ground net primary productivity [ANPP] almost quadrupled as a consequence of replacing grasslands by tree plantations [&4 vs. &17Â Mg dry matter. ha-1.·yr-1], and this difference was evidenced throughout the whole study period. Conclusions: Afforested grasslands intercept more radiation and have higher and more stable ANPP throughout the year, probably as a result of major changes in leaf phenology and root distribution patterns, which in turn allowed better access to water. Changes in carbon uptake can influence climate/biosphere feedbacks and should be considered in land-use planning, especially when grassland afforestation is recommended as a tool to mitigate global warming. | ||
| 653 | 0 | |a ANPP | |
| 653 | 0 | |a LAND-USE CHANGE | |
| 653 | 0 | |a MODIS | |
| 653 | 0 | |a NDVI | |
| 653 | 0 | |a RIO DE LA PLATA GRASSLANDS | |
| 653 | 0 | |a TREE PLANTATIONS | |
| 653 | 0 | |a EUCALYPTUS | |
| 653 | 0 | |a EUCALYPTUS GRANDIS | |
| 700 | 1 | |9 22854 |a Vassallo, María Mercedes | |
| 700 | 1 | |9 29343 |a Dieguez, Hernán | |
| 700 | 1 | |9 17762 |a Garbulsky, Martín Fabio | |
| 700 | 1 | |a Jobbágy, Esteban G. |9 7390 | |
| 700 | 1 | |9 788 |a Paruelo, José María | |
| 773 | |t Applied Vegetation Science |g vol.16, no.3 (2013), p.390-403 | ||
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| 900 | |a ^tGrassland afforestation impact on primary productivity^sA remote sensing approach | ||
| 900 | |a ^aVassallo^bM.M. | ||
| 900 | |a ^aDieguez^bH.D. | ||
| 900 | |a ^aGarbulsky^bM.F. | ||
| 900 | |a ^aJobbágy^bE.G. | ||
| 900 | |a ^aParuelo^bJ.M. | ||
| 900 | |a ^aVassallo^bM. M. | ||
| 900 | |a ^aDieguez^bH. D. | ||
| 900 | |a ^aGarbulsky^bM. F. | ||
| 900 | |a ^aJobbágy^bE. G. | ||
| 900 | |a ^aParuelo^bJ. M. | ||
| 900 | |a ^aVassallo, M.M.^tCátedra de Forrajicultura, IFEVA, Facultad de Agronomía, Universidad de Buenos Aires, CONICET, Av. San Martín 4453 (C1417DSE), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^aVassallo, M.M.^tLaboratorio de Análisis Regional y Teledetección, IFEVA, Facultad de Agronomía, Universidad de Buenos Aires, CONICET, Av. San Martín 4453 (C1417DSE), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^aDieguez, H.D.^tLaboratorio de Análisis Regional y Teledetección, IFEVA, Facultad de Agronomía, Universidad de Buenos Aires, CONICET, Av. San Martín 4453 (C1417DSE), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^aDieguez, H.D.^tDepartamento de Métodos Cuantitativos y Sistemas de Información, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453 (C1417DSE), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^aDieguez, H.D.^tLaboratorio de Ecología Terrestre, CADIC/CONICET Ushuaia, Tierra del Fuego, Argentina | ||
| 900 | |a ^aGarbulsky, M.F.^tCátedra de Forrajicultura, IFEVA, Facultad de Agronomía, Universidad de Buenos Aires, CONICET, Av. San Martín 4453 (C1417DSE), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^aJobbágy, E.G.^tGrupo de Estudios Ambientales - IMASL, Universidad Nacional de San Luis/CONICET, San Luis, Argentina | ||
| 900 | |a ^aParuelo, J.M.^tLaboratorio de Análisis Regional y Teledetección, IFEVA, Facultad de Agronomía, Universidad de Buenos Aires, CONICET, Av. San Martín 4453 (C1417DSE), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^aParuelo, J.M.^tDepartamento de Métodos Cuantitativos y Sistemas de Información, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453 (C1417DSE), Ciudad Autónoma de Buenos Aires, Argentina | ||
| 900 | |a ^tApplied Vegetation Science^cAppl. Veg. Sci. | ||
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| 900 | |a 390 | ||
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| 900 | |a Vol. 16, no. 3 | ||
| 900 | |a 403 | ||
| 900 | |a ANPP | ||
| 900 | |a LAND-USE CHANGE | ||
| 900 | |a MODIS | ||
| 900 | |a NDVI | ||
| 900 | |a RIO DE LA PLATA GRASSLANDS | ||
| 900 | |a TREE PLANTATIONS | ||
| 900 | |a EUCALYPTUS | ||
| 900 | |a EUCALYPTUS GRANDIS | ||
| 900 | |a Question: How is the magnitude and seasonality of carbon uptake affected by the replacement of native grasslands by eucalyptus plantations? Location: Río de la Plata Grasslands in Argentina and Uruguay. Methods: A total of 115 paired sites of fast-growing Eucalyptus grandis plantations and adjacent grasslands were used to characterize the magnitude and seasonality of [1] radiation interception by canopies and [2] above-ground net primary productivity based on a time series of MODIS-derived normalized difference vegetation index [NDVI]. The response of NDVI to precipitation was explored across temporal scales. Results: NDVI in afforested vs. grassland plots presented higher annual averages [1.3-fold], lower seasonal ranges [average relative range of 0.11 vs. 0.29] and delayed growing seasons [2-month shift]. Temporally, NDVI was positively associated with precipitation input, showing a correlation with longer periods of precipitation accumulation in tree plantations compared to grasslands [greather than 7 vs. 2-3 months]. Estimated average annual above-ground net primary productivity [ANPP] almost quadrupled as a consequence of replacing grasslands by tree plantations [&4 vs. &17Â Mg dry matter. ha-1.·yr-1], and this difference was evidenced throughout the whole study period. Conclusions: Afforested grasslands intercept more radiation and have higher and more stable ANPP throughout the year, probably as a result of major changes in leaf phenology and root distribution patterns, which in turn allowed better access to water. Changes in carbon uptake can influence climate/biosphere feedbacks and should be considered in land-use planning, especially when grassland afforestation is recommended as a tool to mitigate global warming. | ||
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