Ecosystem functional changes associated with land clearing in NW Argentina
We assessed the extension of natural habitat conversion into croplands and grazing lands in subtropical NW Argentina and its impact on two key ecosystem functional attributes. We quantified changes in remotely sensed surrogates of aboveground net primary production [ANPP] and seasonality of carbon g...
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2012Volante.pdf LINK AL EDITOR |
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| 245 | 1 | 0 | |a Ecosystem functional changes associated with land clearing in NW Argentina |
| 520 | |a We assessed the extension of natural habitat conversion into croplands and grazing lands in subtropical NW Argentina and its impact on two key ecosystem functional attributes. We quantified changes in remotely sensed surrogates of aboveground net primary production [ANPP] and seasonality of carbon gains. Both functional attributes are associated with intermediate ecosystem services sensu Fisher et al. [2009]. Deforestation was estimated based on photointerpretation of Landsat imagery. The seasonal dynamics of the MODIS satellite Enhanced Vegetation Index [EVI] was used to calculate the EVI annual mean as a surrogate of ANPP, and the EVI seasonal coefficient of variation as an indicator of seasonal variability of carbon gains. The 2000-2007 period showed a high rate of land clearing: 5.9 percent of NW Argentina [1,757,600. ha] was cleared for agriculture and ranching, corresponding to an annual rate of 1.15 percent. Dry forests experienced the highest rate and humid forests the lowest. Though land clearing for agriculture and ranching had relatively small impacts on total annual ANPP, once deforested, parcels significantly became more seasonal than the natural vegetation replaced. Such increase in seasonality is associated with a reduction of photosynthetic activity during a portion of the year [fallow]. Direct consequences of this reduction can be expected on several ecosystem services such as erosion control and water regulation, due to greater exposure of bare soil, and biodiversity, due to the loss or decline in habitat quality and the decrease of green biomass availability for primary consumers during fallow. Land clearing also increased the magnitude of inter-annual differences in C gains, suggesting a greater buffer capacity against climate fluctuations of natural vegetation compared to croplands. | ||
| 653 | 0 | |a CARBON GAIN DYNAMICS | |
| 653 | 0 | |a DEFORESTATION | |
| 653 | 0 | |a INTER-ANNUAL VARIABILITY | |
| 653 | 0 | |a INTERMEDIATE ECOSYSTEM SERVICES | |
| 653 | 0 | |a NET PRIMARY PRODUCTION | |
| 653 | 0 | |a REMOTE SENSING | |
| 653 | 0 | |a SUBTROPICAL SOUTH AMERICA | |
| 653 | 0 | |a ABOVEGROUND PRODUCTION | |
| 653 | 0 | |a AGRICULTURAL LAND | |
| 653 | 0 | |a ANNUAL VARIATION | |
| 653 | 0 | |a BARE SOIL | |
| 653 | 0 | |a BUFFER ZONE | |
| 653 | 0 | |a CLIMATE CHANGE | |
| 653 | 0 | |a DRY FOREST | |
| 653 | 0 | |a ECOSYSTEM FUNCTION | |
| 653 | 0 | |a ECOSYSTEM SERVICE | |
| 653 | 0 | |a ENVIRONMENTAL IMPACT ASSESSMENT | |
| 653 | 0 | |a EROSION CONTROL | |
| 653 | 0 | |a FUNCTIONAL CHANGE | |
| 653 | 0 | |a HABITAT QUALITY | |
| 653 | 0 | |a HUMID ENVIRONMENT | |
| 653 | 0 | |a LAND USE CHANGE | |
| 653 | 0 | |a LANDSAT | |
| 653 | 0 | |a MODIS | |
| 653 | 0 | |a NET PRIMARY PRODUCTION | |
| 653 | 0 | |a PHOTOSYNTHESIS | |
| 653 | 0 | |a RANCHING | |
| 653 | 0 | |a SATELLITE IMAGERY | |
| 653 | 0 | |a SEASONAL VARIATION | |
| 653 | 0 | |a SUBTROPICAL REGION | |
| 653 | 0 | |a VEGETATION DYNAMICS | |
| 653 | 0 | |a ARGENTINA | |
| 653 | 0 | |a SOUTH AMERICA | |
| 700 | 1 | |9 37039 |a Volante, José Norberto | |
| 700 | 1 | |9 47964 |a Alcaraz Segura, Domingo | |
| 700 | 1 | |9 47925 |a Mosciaro, María J. | |
| 700 | 1 | |a Viglizzo, Ernesto F. |9 5215 | |
| 700 | 1 | |9 788 |a Paruelo, José María | |
| 773 | |t Agriculture, Ecosystems and Environment |g Vol.154 (2012), p.12-22 | ||
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| 900 | |a ^tEcosystem functional changes associated with land clearing in NW Argentina | ||
| 900 | |a ^aVolante^bJ.N. | ||
| 900 | |a ^aAlcaraz-Segura^bD. | ||
| 900 | |a ^aMosciaro^bM.J. | ||
| 900 | |a ^aViglizzo^bE.F. | ||
| 900 | |a ^aParuelo^bJ.M. | ||
| 900 | |a ^aVolante^bJ. N. | ||
| 900 | |a ^aAlcaraz Segura^bD. | ||
| 900 | |a ^aMosciaro^bM. J. | ||
| 900 | |a ^aViglizzo^bE. F. | ||
| 900 | |a ^aParuelo^bJ. M. | ||
| 900 | |a ^aVolante, J.N.^tLaboratorio de Teledetección y SIG, INTA Salta, Ruta Nacional 68, km 172, Salta, Argentina | ||
| 900 | |a ^aAlcaraz-Segura, D.^tLaboratorio de Análisis Regional y Teledetección, Departamento de Métodos Cuantitativos y Sistemas de información, Facultad de Agronomía and IFEVA, Universidad de Buenos Aires and CONICET, Avda. San Martín, 4453, Buenos Aires 1417, Argentina | ||
| 900 | |a ^aMosciaro, M.J.^tCentro Andaluz para la Evaluación y Seguimiento del Cambio Global, Departamento de Biología Vegetal y Ecología, Universidad de Almería, Ctra. Sacramento s/n, Almería 04120, Spain | ||
| 900 | |a ^aViglizzo, E.F.^tINTA Centro Regional La Pampa - San Luis, La Pampa, Argentina | ||
| 900 | |a ^aParuelo, J.M.^t | ||
| 900 | |a ^tAgriculture, Ecosystems and Environment^cAgric. Ecosyst. Environ. | ||
| 900 | |a en | ||
| 900 | |a 12 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 154 | ||
| 900 | |a 22 | ||
| 900 | |a CARBON GAIN DYNAMICS | ||
| 900 | |a DEFORESTATION | ||
| 900 | |a INTER-ANNUAL VARIABILITY | ||
| 900 | |a INTERMEDIATE ECOSYSTEM SERVICES | ||
| 900 | |a NET PRIMARY PRODUCTION | ||
| 900 | |a REMOTE SENSING | ||
| 900 | |a SUBTROPICAL SOUTH AMERICA | ||
| 900 | |a ABOVEGROUND PRODUCTION | ||
| 900 | |a AGRICULTURAL LAND | ||
| 900 | |a ANNUAL VARIATION | ||
| 900 | |a BARE SOIL | ||
| 900 | |a BUFFER ZONE | ||
| 900 | |a CLIMATE CHANGE | ||
| 900 | |a DRY FOREST | ||
| 900 | |a ECOSYSTEM FUNCTION | ||
| 900 | |a ECOSYSTEM SERVICE | ||
| 900 | |a ENVIRONMENTAL IMPACT ASSESSMENT | ||
| 900 | |a EROSION CONTROL | ||
| 900 | |a FUNCTIONAL CHANGE | ||
| 900 | |a HABITAT QUALITY | ||
| 900 | |a HUMID ENVIRONMENT | ||
| 900 | |a LAND USE CHANGE | ||
| 900 | |a LANDSAT | ||
| 900 | |a MODIS | ||
| 900 | |a NET PRIMARY PRODUCTION | ||
| 900 | |a PHOTOSYNTHESIS | ||
| 900 | |a RANCHING | ||
| 900 | |a SATELLITE IMAGERY | ||
| 900 | |a SEASONAL VARIATION | ||
| 900 | |a SUBTROPICAL REGION | ||
| 900 | |a VEGETATION DYNAMICS | ||
| 900 | |a ARGENTINA | ||
| 900 | |a SOUTH AMERICA | ||
| 900 | |a We assessed the extension of natural habitat conversion into croplands and grazing lands in subtropical NW Argentina and its impact on two key ecosystem functional attributes. We quantified changes in remotely sensed surrogates of aboveground net primary production [ANPP] and seasonality of carbon gains. Both functional attributes are associated with intermediate ecosystem services sensu Fisher et al. [2009]. Deforestation was estimated based on photointerpretation of Landsat imagery. The seasonal dynamics of the MODIS satellite Enhanced Vegetation Index [EVI] was used to calculate the EVI annual mean as a surrogate of ANPP, and the EVI seasonal coefficient of variation as an indicator of seasonal variability of carbon gains. The 2000-2007 period showed a high rate of land clearing: 5.9 percent of NW Argentina [1,757,600. ha] was cleared for agriculture and ranching, corresponding to an annual rate of 1.15 percent. Dry forests experienced the highest rate and humid forests the lowest. Though land clearing for agriculture and ranching had relatively small impacts on total annual ANPP, once deforested, parcels significantly became more seasonal than the natural vegetation replaced. Such increase in seasonality is associated with a reduction of photosynthetic activity during a portion of the year [fallow]. Direct consequences of this reduction can be expected on several ecosystem services such as erosion control and water regulation, due to greater exposure of bare soil, and biodiversity, due to the loss or decline in habitat quality and the decrease of green biomass availability for primary consumers during fallow. Land clearing also increased the magnitude of inter-annual differences in C gains, suggesting a greater buffer capacity against climate fluctuations of natural vegetation compared to croplands. | ||
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