Spatial and temporal variation of primary production of Patagonian wet meadows
In extra-Andean Patagonia, wet meadows contrast with the prevailing arid steppes, and present a gradient of water availability from the periphery to the center. The objectives of this paper are to describe the spatial and temporal variation of aerial net primary production [ANPP] of Patagonian meado...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2010Buono.pdf LINK AL EDITOR |
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| 245 | 1 | 0 | |a Spatial and temporal variation of primary production of Patagonian wet meadows |
| 520 | |a In extra-Andean Patagonia, wet meadows contrast with the prevailing arid steppes, and present a gradient of water availability from the periphery to the center. The objectives of this paper are to describe the spatial and temporal variation of aerial net primary production [ANPP] of Patagonian meadows, and to obtain a model for the relationship between the normalized difference vegetation index [NDVI] and ANPP. We determined ANPP in four regionally scattered meadows during 3-5 years and in three positions of the gradient of water availability. In one meadow, we correlated ANPP with NDVI during 2 years. Annual ANPP was 2-3 times larger in the center than in the periphery, and also varied 2-3 fold among the four meadows. The interannual variation of ANPP was high and similar across meadows and zones. ANPP was closely correlated with NDVI through a linear model. Within the growing season, the central zone had a more extended period of high NDVI into the summer than the peripheral and the intermediate zones. We conclude that [1] the local variation of ANPP across the gradient of water availability is strong and must be taken into account for management, and [2] the highly variable ANPP may be monitored by remote sensing. | ||
| 653 | 0 | |a AZONAL COMMUNITIES | |
| 653 | 0 | |a INTERANNUAL VARIATION | |
| 653 | 0 | |a LANDSCAPE | |
| 653 | 0 | |a MALLIN | |
| 653 | 0 | |a REMOTE SENSING | |
| 653 | 0 | |a SEASONAL VARIATION | |
| 653 | 0 | |a ANNUAL VARIATION | |
| 653 | 0 | |a GROWING SEASON | |
| 653 | 0 | |a LANDSCAPE ECOLOGY | |
| 653 | 0 | |a MEADOW | |
| 653 | 0 | |a NDVI | |
| 653 | 0 | |a NET PRIMARY PRODUCTION | |
| 653 | 0 | |a PERIPHERAL REGION | |
| 653 | 0 | |a SPATIOTEMPORAL ANALYSIS | |
| 653 | 0 | |a WATER AVAILABILITY | |
| 653 | 0 | |a PATAGONIA | |
| 700 | 1 | |9 27175 |a Buono, Gustavo Gabriel | |
| 700 | 1 | |9 8019 |a Oesterheld, Martín | |
| 700 | 1 | |9 51273 |a Nakamatsu, Viviana B. | |
| 700 | 1 | |9 788 |a Paruelo, José María | |
| 773 | |t Journal of Arid Environments |g Vol.74, no.10 (2010), p.1257-1261 | ||
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| 900 | |a ^tSpatial and temporal variation of primary production of Patagonian wet meadows | ||
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| 900 | |a ^aBuono, G.^tINTA EEA CHUBUT, C.C. 88, 9100 Trelew, Chubut, Argentina | ||
| 900 | |a ^aOesterheld, M.^tIFEVA, Faculty of Agronomy, University of Buenos Aires/CONICET, Av. San Martín 4453, 1417 Buenos Aires, Argentina | ||
| 900 | |a ^aNakamatsu, V.^tINTA EEA ESQUEL, Chacabuco 513, 9200 Esquel, Chubut, Argentina | ||
| 900 | |a ^aParuelo, J.M.^t | ||
| 900 | |a ^tJournal of Arid Environments^cJ. Arid Environ. | ||
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| 900 | |a ^i | ||
| 900 | |a Vol. 74, no. 10 | ||
| 900 | |a 1261 | ||
| 900 | |a AZONAL COMMUNITIES | ||
| 900 | |a INTERANNUAL VARIATION | ||
| 900 | |a LANDSCAPE | ||
| 900 | |a MALLIN | ||
| 900 | |a REMOTE SENSING | ||
| 900 | |a SEASONAL VARIATION | ||
| 900 | |a ANNUAL VARIATION | ||
| 900 | |a GROWING SEASON | ||
| 900 | |a LANDSCAPE ECOLOGY | ||
| 900 | |a MEADOW | ||
| 900 | |a NDVI | ||
| 900 | |a NET PRIMARY PRODUCTION | ||
| 900 | |a PERIPHERAL REGION | ||
| 900 | |a SPATIOTEMPORAL ANALYSIS | ||
| 900 | |a WATER AVAILABILITY | ||
| 900 | |a PATAGONIA | ||
| 900 | |a In extra-Andean Patagonia, wet meadows contrast with the prevailing arid steppes, and present a gradient of water availability from the periphery to the center. The objectives of this paper are to describe the spatial and temporal variation of aerial net primary production [ANPP] of Patagonian meadows, and to obtain a model for the relationship between the normalized difference vegetation index [NDVI] and ANPP. We determined ANPP in four regionally scattered meadows during 3-5 years and in three positions of the gradient of water availability. In one meadow, we correlated ANPP with NDVI during 2 years. Annual ANPP was 2-3 times larger in the center than in the periphery, and also varied 2-3 fold among the four meadows. The interannual variation of ANPP was high and similar across meadows and zones. ANPP was closely correlated with NDVI through a linear model. Within the growing season, the central zone had a more extended period of high NDVI into the summer than the peripheral and the intermediate zones. We conclude that [1] the local variation of ANPP across the gradient of water availability is strong and must be taken into account for management, and [2] the highly variable ANPP may be monitored by remote sensing. | ||
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