Synergetic effects of fire, climate, and management history on Prosopis caldenia recruitment in the Argentinean pampas

Bogino, Stella; Roa-Giménez, Sonia Catalina; Velasco-Sastre, Ana Teresa; Cangiano, Maria Laura; Risio-Allione, Lucía; Rozas, Vicente

doi:10.1016/j.jaridenv.2015.02.014

Cited by 16 publications

(6 citation statements)

References 17 publications

(27 reference statements)

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“…The mean radial growth of G. decorticans (3.95 mm year -1 ) is similar to that of Prosopis caldenia (2.69 -5.12 mm year -1 ) growing in the same area (Bogino and Villalba 2008) or in the province of La Pampa (2.2 -4.52 mm year -1 ) (Bogino et al 2015, Velasco et al 2018. These results pointed out that woody species have similar growing rates even though they are dominant (P. caldenia), or codominant or intermediate (G. decorticans) species.…”

Section: Discussionmentioning

confidence: 53%

“…One of the most relevant applications of a growth-ring analysis is its use to establish the relationship between annual growth and climatic variables and, consequently, the reconstruction of past climatic conditions. Previous dendrochronological studies in the arid and semi-arid environments of Argentina had analyzed the most long-lived species with the highest timber value with special emphasis on the genus Prosopis (Morales et al 2005, Villagra et al 2005, Dussart et al 2011, Bogino et al 2015. Therefore, knowing about the growth dynamics of pioneer species will complement these studies and establish the interconnection between main species and those that are codominant or intermediate in a secondary forest (Gorzelak et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Growth dynamics of Geoffroea decorticans and Parkinsonia praecox and their response to climate in arid and semiarid environments in Argentina

2021

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Arid and semiarid environments dominate the Earth's surface and are very vulnerable to global change. Chañar (Geoffroea decorticans) and brea (Parkinsonia praecox) are two ubiquitous woody species of these environments. They grow in degraded forests, strongly modified areas and as a main component of secondary forests. Despite the value of both species, little is known about their growth dynamics and their relationship with climate. The objective of this research was to determine their dendrochronological potential and the connection between growth and climate variables. Anatomical and standard dendrochronological methods were applied. First of all, we stated the anatomical characteristics that allowed us to detect tree-ring boundaries (terminal parenchyma and variation in the shape of vessels). Further, after dating and measurement of tree rings we determined significant correlation between series, which means a common growth signal among trees as a result of environmental variable effects. Trees were not older than 40 years. Mean annual radial growth was 3.37 mm (SD±0.71) and 2.16 mm (SD±0.61) for chañar and brea, respectively. Finally, chañar and brea had a negative growth-mean temperature association. Rainfall affected chañar and brea growth in summer previous to the growing season. Southern Oscillation Index (SOI) had an inverse association with growth of brea. This means, in the case of brea, a significant association with local (temperature and rainfall) and global (SOI) climate variables. These results evidenced the growth dynamics of both species and their value for dendroclimatological studies for the first time.

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Section: Discussionmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Growth dynamics of Geoffroea decorticans and Parkinsonia praecox and their response to climate in arid and semiarid environments in Argentina

2021

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“…Establishment of R. girolae during the first decade of the 20th century coincides with that of species from other semi-arid environments such as Prosopis caldenia Burkart (Bogino et al 2015). However, anthropogenic factors such as the construction of railways and the changes in land tenure that impacted the growth dynamics of these species were not identified as a factor in the case of R. girolae.…”

Section: Discussionmentioning

confidence: 88%

Wood anatomy and dendroclimatological potential of Ramorinoa girolae: a species endemic to arid environments of Argentina

Zapata¹,

Guerra

Bogino

2022

Bosque (Valdivia)

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Chica (Ramorinoa girolae, Fabaceae) is an endemic species with a valuable ecological role in arid environments of Argentina, protecting watersheds and wildlife and providing food for humans. The aim of this study was to describe its woody anatomy, growth dynamics, recruitment and relation to climate. Samples from three sites were collected, and anatomical woody analysis and standard dendrochronological techniques were applied. After dating the samples, residual tree-ring chronology was compared with two climate variables, temperature and southern oscillation index (SOI). Results show that chica has variable porosity (diffused, semicircular or circular) with single or grouped vessels. Vessel density varies among the annual growth rings. The storied rays are considered characteristics of a specialized wood. Wider vessels in the beginning of the growing season and terminal parenchyma allowed us to detect tree-ring boundaries. Missing rings and lenses were common, making the dating process difficult. Mean radial growth was 1.2 mm year -1 (SD ± 0.25; 1605 -2009 period). Temperature and SOI have a positive impact on growth. Results showed the anatomical adaptations of chica wood to arid conditions and its potential to provide data from more than 400 years to environmental and temporal studies.

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“…Fires and grazing are known to enhance synergistically woody plant establishment through the removal of grasses (Grellier et al, 2012;Wakeling et al, 2015), the dispersal of woody plant seeds (Lerner & Peinetti, 1996), and seed scarification (De Villalobos et al, 2007;Peinetti et al, 1993). Furthermore, there is evidence from dendrochronological studies carried out within the study region that P. caldenia recruitment occurred following severe fire events (Bogino et al, 2015;Dussart et al, 1998). Prescribed fires that were regularly applied after the 2006 wildfire event would likely have been severe enough to cause most young P. caldenia plants to adopt a shrub life form (Figure 4f).…”

Section: Discussionmentioning

confidence: 96%

Thresholds and alternative states in a Neotropical dry forest in response to fire severity

Peinetti,

Bestelmeyer,

Chirino

et al. 2023

Ecological Applications

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Neotropical xerophytic forest ecosystems evolved with fires that shaped their resilience to disturbance events. However, it is unknown whether forest resilience to fires persists under a new fire regime influenced by anthropogenic disturbance and climate change. We asked whether there was evidence for a fire severity threshold causing an abrupt transition from a forest to an alternative shrub thicket state in the presence of typical postfire management. We studied a heterogeneous wildfire event to assess medium‐term effects (11 years) of varying fire severity in a xerophytic Caldén forest in central Argentina. We conducted vegetation surveys in patches that were exposed to low (LFS), medium (MFS), and high (HFS) fire severities but had similar prefire woody canopy cover. Satellite images were used to quantify fire severity using a delta Normalized Burning Ratio (dNBR) and to map prefire canopy cover. Postfire total woody canopy cover was higher in low and medium than high severity patches, but the understory woody component was highest in HFS patches. The density of woody plants was over three times higher under HFS than MFS and LFS due to the contribution of small woody plants to the total density. Unlike LFS and MFS patches, the small plants in HFS patches were persistent, multistem shrubs that resulted from the resprouting of top‐killed Prosopis caldenia trees and, more importantly, from young shrubs that probably established after the wildfire. Our results suggest that the Caldén forest is resilient to fires of low to moderate severities but not to high‐severity fires. Fire severities with dNBR values > ~600 triggered an abrupt transition to a shrub thicket state. Postfire grazing and controlled‐fire treatments likely contributed to shrub dominance after high‐severity wildfire. Forest to shrub thicket transitions enable recurring high‐severity fire events. We propose that repeated fires combined with grazing can trap the system in a shrub thicket state. Further studies are needed to determine whether the relationships between fire and vegetation structure examined in this case study represent general mechanisms of irreversible state changes across the Caldenal forest region and whether analogous threshold relationships exist in other fire‐prone woodland ecosystems.

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Synergetic effects of fire, climate, and management history on Prosopis caldenia recruitment in the Argentinean pampas

Cited by 16 publications

References 17 publications

Growth dynamics of Geoffroea decorticans and Parkinsonia praecox and their response to climate in arid and semiarid environments in Argentina

Growth dynamics of Geoffroea decorticans and Parkinsonia praecox and their response to climate in arid and semiarid environments in Argentina

Wood anatomy and dendroclimatological potential of Ramorinoa girolae: a species endemic to arid environments of Argentina

Thresholds and alternative states in a Neotropical dry forest in response to fire severity

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