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Background and aims <p>High Andean wetlands of the Puna ecoregion, locally called <i>vegas,</i> store large amounts of carbon (C), being important regional C reservoirs. However, little is known about the variation of environmental factors and its influence in C stock patterns in these wetlands. This study characterizes plant and soil C stocks in <i>vegas</i> of the Argentine Puna<i>,</i> and analyze the environmental drivers operating at regional and local scales. Finally, we contextualize the observed C pattern within a broader ecoregional framework.</p> Methods <p>We selected 10 <i>vegas</i> (3,323–4,748&#xa0;m a.s.l.), quantified C stored in plant biomass (aerial and root tissues) and soil (30&#xa0;cm depth) and evaluated the association of soil C stocks with biological and environmental factors at regional and local scales.</p> Results <p>Averaged C stocks in aerial biomass were significantly lower than root C stocks (3.01 ± 0.37 and 4.25 ± 0.4&#xa0;Mg C ha<sup>−1</sup>, respectively). Soil C stocks up to 30&#xa0;cm ranged from 21.79 to 139.67&#xa0;Mg C ha<sup>−1</sup> (mean = 66.11 ± 4.33&#xa0;Mg C ha<sup>−1</sup>). This variability in soil C stocks across <i>vegas</i> was not related to regional environmental factors or plant life cover but it was related to locally varying factors, as soil cation exchange capacity and water table depth. Soil C storage patterns observed in this study were consistent with those reported for other Puna wetlands.</p> Conclusions <p>These findings emphasize the importance of considering <i>vegas</i>’ heterogeneity and their local environmental factors for the proper management and conservation of these ecosystems, while integrating Argentine <i>vegas</i> into the broader ecoregional framework.</p>

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Carbon storage patterns in high Andean wetlands: local factors explain the variability of soil carbon stocks in the Argentine Puna

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • M. Fernanda Chiappero,
  • María V. Vaieretti,
  • Norma Gallardo,
  • Andrea E. Izquierdo

摘要

Background and aims

High Andean wetlands of the Puna ecoregion, locally called vegas, store large amounts of carbon (C), being important regional C reservoirs. However, little is known about the variation of environmental factors and its influence in C stock patterns in these wetlands. This study characterizes plant and soil C stocks in vegas of the Argentine Puna, and analyze the environmental drivers operating at regional and local scales. Finally, we contextualize the observed C pattern within a broader ecoregional framework.

Methods

We selected 10 vegas (3,323–4,748 m a.s.l.), quantified C stored in plant biomass (aerial and root tissues) and soil (30 cm depth) and evaluated the association of soil C stocks with biological and environmental factors at regional and local scales.

Results

Averaged C stocks in aerial biomass were significantly lower than root C stocks (3.01 ± 0.37 and 4.25 ± 0.4 Mg C ha−1, respectively). Soil C stocks up to 30 cm ranged from 21.79 to 139.67 Mg C ha−1 (mean = 66.11 ± 4.33 Mg C ha−1). This variability in soil C stocks across vegas was not related to regional environmental factors or plant life cover but it was related to locally varying factors, as soil cation exchange capacity and water table depth. Soil C storage patterns observed in this study were consistent with those reported for other Puna wetlands.

Conclusions

These findings emphasize the importance of considering vegas’ heterogeneity and their local environmental factors for the proper management and conservation of these ecosystems, while integrating Argentine vegas into the broader ecoregional framework.