Carbon and Water Fluxes in an Exotic Buffelgrass Savanna

Hinojo-Hinojo, César; Castellanos, Alejandro E.; Delgado-Balbuena, Josué; Romo-León, José Raúl; Celaya‐Michel, Hernán; Huxman, Travis E.

doi:10.1016/j.rama.2016.04.002

Cited by 12 publications

(15 citation statements)

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“…This suggests that sites with low levels of P. ciliare invasion may not require active revegetation after treatment. Alternatively, a highly invaded site with few remnant native species may require active revegetation due to inadequate native seed sources, altered soil nutrients, and an altered water budget inhibiting natural revegetation of natives (Castellanos et al 2016;Eilts and Huxman 2013;Fensham et al 2013;Hinojo-Hinojo et al 2016). Although active restoration appears to be critical for effective P. ciliare control in many cases, it is not a silver bullet.…”

Section: Invasive Plant Science and Management 207mentioning

confidence: 99%

Pennisetum ciliare: a review of treatment efficacy, competitive traits, and restoration opportunities

Farrell

Gornish

2019

Invasive plant sci. manag.

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Buffelgrass [Pennisetum ciliare (L.) Link] is a drought-tolerant invasive grass that is a threat to native biodiversity in the drylands of the Americas and Australia. Despite efforts from land managers to control P. ciliare, management approaches tend to have mixed success, treatment results can be poorly communicated among entities, and there are few long-term controlled studies. In this literature review, we synthesize data from both peer-reviewed and “gray” literature on the efficacy of management techniques to control P. ciliare and the secondary impacts to native plant communities. Our search resulted in 42 unique sources containing a total of 229 studies that we categorized into 10 treatment types, which included herbicide, seeding, manual removal, fire, grazing, biocontrol, fire + additional treatments, manual removal + additional treatments, herbicide + additional treatments, and herbicide + manual removal. We found that treatments that used multiple techniques in tandem along with follow-up treatments were the most effective at controlling P. ciliare. Fewer than one-third of the studies reported impacts of management on native species, and the most commonly studied treatment (herbicide, N = 130) showed detrimental impacts on native plant communities. However, the average time between treatment and outcome measurement was only 15 mo; we suggest the need for more long-term studies of treatment efficacy and secondary impacts of treatment on the ecosystem. Finally, we conducted a second literature review on P. ciliare biology and traits for mechanisms that allows P. ciliare to alter the invaded environment to facilitate a competitive advantage over native species. We found evidence of self-reinforcing feedbacks of invasion being generated by P. ciliare through its interactions with water availability, nutrient cycling, and disturbance regimes. We developed a conceptual model of P. ciliare based on these feedback loops and offer management considerations based on its invasion dynamics and biology.

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Section: Invasive Plant Science and Management 207mentioning

confidence: 99%

Pennisetum ciliare: a review of treatment efficacy, competitive traits, and restoration opportunities

Farrell

Gornish

2019

Invasive plant sci. manag.

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“…Al ser una especie exótica, con características fisiológicas que le permiten adaptarse a la región (Ramírez, 1999;Sanderson, Voight, & Jones, 1999;Ramírez et al, 2001), su introducción ha ocasionado que 1) grandes extensiones de terreno con vegetación natural hayan sido remplazadas activamente por sabanas de buffel, y 2) la invasión por parte de dicha especie en sitios de vegetación nativa donde no fue introducida intencionalmente (Burquez-Montijo, Miller, & Martinez-Yrizar, 2002;Castellanos et al, 2002Johnson & Navarro, 1992). 2007Sivakumar, 2007;Pontifes, García-Meneses, Gómez-Aíza, Monterroso-Rivas, & Caso-Chávez, 2018), loss of biodiversity (Valdez-Zamudio, Castellanos Villegas, & Marsh, 2000;Romo-León, van Leeuwen, & Castellanos, 2013), introduction of fire dynamics (O'Hara, Street-Perrot, & Burt 1993;Brooks, et al, 2004), modification to carbon fluxes (Hinojo-Hinojo et al, 2016 and modifications to the structure, composition and floristic function of native ecosystems (Castellanos et al, 2010 and, derived from the introduction of buffel grass in the Sonoran Desert. However, information documenting and comparing how native ecosystems and introduced buffel savannas respond to specific phases of global climate systems is scarce.…”

Section: Introductionunclassified

“…Particularly in northwestern Mexico, in the Sonoran Desert, the presence of different ENSO phases alter precipitation patterns, modify water input to vegetation and the carbon sequestration process (Castellanos et al, 2010;Hinojo-Hinojo et al, 2016;Montaño et al, 2016). Because of the above, the productive response of vegetation can be susceptible to changes in precipitation and temperature patterns (Crimmins, Crimmins, & Bertelsen, 2010;Hinojo-Hinojo et al, 2016). Thus, climate changes associated with the ENSO phenomenon can have significant impacts on arid zones (Holmgren et al, 2006;Zolotokrilyn, Titkova, & Brito-Castillo, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The climate pattern is very complex and causes variations in ocean temperatures in the equatorial Pacific, changes normal surface temperatures, and can have large-scale impacts on both ocean processes and global climate conditions (NOAA, 2018). For example, in the El Niño phase, ocean waters along South America and California warm up to higher than normal temperatures; this leads to higher than normal rainfall events in some parts of Diversos trabajos han documentado procesos como desertificación (Castellanos, et al, 2002;Millennium Ecosystem Assessment [MEA], 2005;Reynolds, et al, 2007;Sivakumar, 2007;Pontifes, García-Meneses, Gómez-Aíza, Monterroso-Rivas, & Caso-Chávez, 2018), pérdida de biodiversidad (Valdez-Zamudio, Castellanos Villegas, & Marsh, 2000;Romo-León, van Leeuwen, & Castellanos, 2013), introducción de dinámicas de fuego (O'Hara, Street-Perrot, & Burt 1993;Brooks, et al, 2004), modificación a los flujos de carbono (Hinojo-Hinojo et al, 2016) y modificaciones de la estructura composición y función florística de los ecosistemas nativos (Castellanos et al, 2010(Castellanos et al, y 2013, derivados de la introducción de zacate buffel en el Desierto Sonorense. Sin embargo, la información que documente y compare cómo los ecosistemas nativos y las sabanas introducidas de buffel responden ante fases específicas de sistemas climáticos globales es escasa.…”

Section: Introductionunclassified

“…Particularmente en el Noroeste de México, en el Desierto Sonorense la presencia de las diferentes fases del ENSO alteran los patrones de precipitación, modifican la entrada de agua a la vegetación y el proceso de captura de carbono (Castellanos et al, 2010;Hinojo-Hinojo et al, 2016;Montaño et al, 2016). Por lo anterior, la respuesta productiva de la vegetación puede ser susceptible a los cambios de la precipitación y los patrones de temperatura (Crimmins, Crimmins, & Bertelsen, 2010;Hinojo-Hinojo et al, 2016). Así, los cambios climáticos asociados al fenómeno ENSO pueden tener impactos significativos en las zonas áridas (Holmgren et al, 2006;Zolotokrilyn, Titkova, & Brito-Castillo, 2016).…”

Section: Introductionunclassified

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Análisis de la respuesta productiva ante la variabilidad climática en tipos de vegetación exótica y nativa del Desierto Sonorense

2021

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La introducción de zacate buffel (Cenchrus ciliaris) para incrementar la producción de forraje ha provocado modificaciones en grandes extensiones de terreno del Desierto Sonorense. Aunado a lo anterior, nuestro conocimiento acerca de la influencia de fenómenos climáticos, como El Niño, sobre la dinámica de productividad en la vegetación, es limitado. El presente trabajo pretende analizar la actividad fotosintética/productiva de la vegetación del Desierto Sonorense en sitios con matorral subtropical y praderas de buffel para determinar diferencias entre fases del fenómeno El Niño Oscilación del Sur (ENSO acrónimo en inglés). Se establecieron sitios de estudio en comunidades vegetales con y sin buffel. Se adquirieron imágenes satelitales del “Moderate Resolution Imaging Spectroradiometer (MODIS)” para derivar el Índice de Vegetación de Diferencia Normalizada (NDVI, acrónimo en inglés) en compuestos de 16 días. Se obtuvo información acerca de las diferentes fases de El Niño desde 2001 hasta 2017. Los resultados sugieren actividad productiva mayor durante la fase Neutra que durante las fases El Niño o La Niña. También, el matorral subtropical presenta mayor actividad productiva que las praderas de buffel en cualquiera de las combinaciones estación-fase analizadas, excepto en La Niña durante el verano

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Plant functional diversity influences water and carbon fluxes and their use efficiencies in native and disturbed dryland ecosystems

et al. 2022

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Vegetation is changing rapidly in dryland ecosystems, but critical gaps remain in understanding the long-term fluxes of carbon (C) and water. We used 6 years of data from two adjacent eddy covariance sites in the Sonoran Desert, a species-rich woody C 3 native shrubland and a species-poor C 4 shrubland converted to buffelgrass savanna. Although emphasis has been given to the physical determinants of productivity in dryland ecosystems, we assessed how PFTs changes influenced (1) water and C fluxes and (2) water-use (WUEe) and intrinsic C-use efficiencies (CUEei) in the two sites under the same climatological conditions. We hypothesized that changes in PFTs would alter accessibility, rate and use efficiencies of water and carbon, with poorly known effects on the long-term fluxes and efficiencies. Annual net ecosystem productivity (NEP) in the shrubland was a C-source in drier years and a sink in others. However, longer C uptake, greater WUEe and lower CUEei were the crucial drivers for higher and positive NEP (C sink) in the savanna. Annual and seasonal WUEe and CUEei discrepancies indicated the importance of dominant PFTs after disturbance and ecohydrological feedbacks. As the world becomes drier and vegetation disturbance more common, the role of PFT changes should contribute to gaining a clearer understanding of their role in the C and water fluxes of dryland ecosystems.

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Carbon and Water Fluxes in an Exotic Buffelgrass Savanna

Cited by 12 publications

References 50 publications

Pennisetum ciliare: a review of treatment efficacy, competitive traits, and restoration opportunities

Pennisetum ciliare: a review of treatment efficacy, competitive traits, and restoration opportunities

Análisis de la respuesta productiva ante la variabilidad climática en tipos de vegetación exótica y nativa del Desierto Sonorense

Plant functional diversity influences water and carbon fluxes and their use efficiencies in native and disturbed dryland ecosystems

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