Productivity, management and development problems in the arid rangelands of the central Mendoza plains (Argentina)

Guevara, J.C.; Cavagnaro, Juan Bruno; Estevez, O.R.; Houérou, Henry Noël Le; Stasi, C.R.

doi:10.1006/jare.1996.0194

Cited by 43 publications

(31 citation statements)

References 18 publications

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“…v www.esajournals.org , Diouf and Lambin 2001, Veron et al 2002, Wessels et al 2007, Yang et al 2008, PRVR greater than 1 is more common (Le Houerou et al 1988, Lauenroth and Sala 1992, Xiao et al 1996, Guevara et al 1997, Veron et al 2002, Wiegand et al 2004, Hu et al 2007, Yang et al 2008 and PRVR values as high as 2.5 or 3 have been documented (Le Houerou et al 1988, Guevara et al 1997. High PRVR values appear to suggest that unknown processes somehow amplify variation in production relative to variation in precipitation.…”

Section: Introductionmentioning

confidence: 99%

Anticipating changes in variability of grassland production due to increases in interannual precipitation variability

Hsu

Adler

2014

Ecosphere

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Abstract. Expected increases in interannual precipitation variability due to climate change will lead to increases in the variability of primary production, with potentially important consequences for natural resource management. Previous work has suggested that various biotic and abiotic processes might amplify or buffer variation in production in response to variation in precipitation. In particular, production to rain variability ratios (PRVR), the coefficient of variation of production divided by the coefficient of variation of precipitation, indicate that production is often relatively more variable than precipitation. We used 37 long-term data sets from grasslands across the globe to test how future increases in precipitation variability might alter the variability of aboveground net primary production (ANPP). We demonstrate that PRVR is not a useful metric: it is predicted by a site's precipitation-production relationship and a PRVR greater than 1 need not imply that increases in the variability of ANPP will be disproportionately greater than increases in precipitation variability. Instead, it is the form of the precipitation-ANPP relationship that determines how increases in precipitation variability will impact ANPP variability. We fit linear, lag effect, and nonlinear precipitation-ANPP relationships to each data set. At most sites, the precipitation-ANPP relationship is weakly nonlinear, though the lag effect model, incorporating previous year ANPP, performed best at several sites. To test whether the three models project differences in the response of ANPP to future increases in precipitation variability, we directly perturbed the observed precipitation time series and quantified the results of this perturbation on ANPP variability. Under simple linear or lag effect models, relative increases in ANPP variability were always equal to the relative increases in precipitation variability. When we modeled ANPP as a nonlinear, saturating function of precipitation, projected increases in ANPP variability were disproportionately high, with production dropping more in dry years than it increases in wet years. In six cases, increases in ANPP variability were twice as large as increases in precipitation variability. Based on Akaike model weights, a 5% increase in precipitation variability would cause a 6.3% increase in ANPP variability on average.

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Section: Introductionmentioning

confidence: 99%

Anticipating changes in variability of grassland production due to increases in interannual precipitation variability

Hsu

Adler

2014

Ecosphere

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“…Donkey (Equus asinus) and cow (Bos taurus) were pointed out as the most useful organisms in Valle Fértil. However, both are introduced exotic species which are strong competitors for local grazers and cause overgrazing and biodiversity reduction in the region Guevara et al, 1996;Ojeda et al, 1998;Malo, Acebes, Gianonni, & Traba, 2011). The observed positive attitudes towards exotic species due to aesthetics and use demonstrate the necessity of local conservation education programs.…”

Section: Discussionmentioning

confidence: 99%

“…The population, a mix of indigenous tribes and white settlers, lives mainly from farming. Extensive grazing is typical for the area, and cattle are competing with native herbivores such as guanaco for the scarce resources (Guevara, Cavagnaro, Estevez, Le Houérou, & Stasi, 1996;Ojeda et al, 1998). This leads to overgrazing in some places and, in consequence, to a loss of local wild plant species.…”

Section: Study Design and Data Collectionmentioning

confidence: 99%

The Impact of a Short Conservation Education Workshop on Argentinean Students’ Knowledge about and Attitudes towards Species

Nates¹,

Campos²,

Lindemann‐Matthies³

2012

EURASIA J MATH SCI T

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“…Mendoza weather conditions may be labeled 'warm-arid'. Annual rainfall ranges from 100 mm in the north, up to 400 mm in the south, with a mean annual temperature varying from 13°C in the south to 20°C in the north (Guevara, 1997). Irrigation is essential for crops production.…”

Section: Waste Water Use In Energy Crops Production In Mendoza Argenmentioning

confidence: 99%

Waste-Water Use in Energy Crops Production

Rébora¹,

Lelio²,

Gómez³

et al. 2011

Waste Water - Treatment and Reutilization

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Productivity, management and development problems in the arid rangelands of the central Mendoza plains (Argentina)

Cited by 43 publications

References 18 publications

Anticipating changes in variability of grassland production due to increases in interannual precipitation variability

Anticipating changes in variability of grassland production due to increases in interannual precipitation variability

The Impact of a Short Conservation Education Workshop on Argentinean Students’ Knowledge about and Attitudes towards Species

Waste-Water Use in Energy Crops Production

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