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<p>Mangroves are important carbon sinks, and thus play a crucial role in reducing greenhouse gas emissions. In addition to anthropogenic disturbances, climate change is projected to affect carbon in mangroves, although the extent of this impact is poorly known in West-Africa. We focused on mangroves of Ramsar sites 1017 and 1018 in Benin and aimed to estimate the carbon stock in disturbed versus undisturbed mangroves and predict the impact of future climate on the spatial distribution of carbon stock in mangroves. Plot-based sampling (n = 180) was used to collect data on tree and soil carbon in disturbed and undisturbed mangroves. The impact of future climate on the carbon stock were modelled using the MIROC6 future climate model under SSP245 and SSP585climate scenarios. Results showed that tree carbon stock (Mg.ha<sup>−1</sup>) in site 1017 was 2.79 time higher in undisturbed sites (164.9 ± 8.19) than disturbed sites (59.14 ± 9.06), while in site 1018, it was 4.92 time higher in undisturbed sites (158.08 ± 12.28) than disturbed sites (32.14 ± 5.74). However, soil carbon stock was 1.12 and 1.25 times higher in undisturbed sites than disturbed sites in Ramsar sites 1017 and 1018, respectively. Future climate is predicted to decrease high carbon stock class by 2050 (4–8%) and 2080 (10–12%) under the two scenarios, but more so for SSP585 than for SSP245. At site 1017, future climate would cause a slight reduction (7.6%) compared to site 1018 where a higher reduction (52.6%) would be observed. Mangroves planting could help mitigating the predicted impact of future climate on carbon loss.</p>

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Impact of Anthropogenic Activities and Climate Change on Carbon Stock in a West-African Mangrove

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Babatondé Innocent Kochoni,
  • Kolawolé Valère Salako,
  • Kangbéni Dimobe,
  • Gafarou Agounde,
  • Mahoutin G. Serge Zanvo,
  • Jones Abrefa Danquah,
  • Romain Glèlè Kakaï

摘要

Mangroves are important carbon sinks, and thus play a crucial role in reducing greenhouse gas emissions. In addition to anthropogenic disturbances, climate change is projected to affect carbon in mangroves, although the extent of this impact is poorly known in West-Africa. We focused on mangroves of Ramsar sites 1017 and 1018 in Benin and aimed to estimate the carbon stock in disturbed versus undisturbed mangroves and predict the impact of future climate on the spatial distribution of carbon stock in mangroves. Plot-based sampling (n = 180) was used to collect data on tree and soil carbon in disturbed and undisturbed mangroves. The impact of future climate on the carbon stock were modelled using the MIROC6 future climate model under SSP245 and SSP585climate scenarios. Results showed that tree carbon stock (Mg.ha−1) in site 1017 was 2.79 time higher in undisturbed sites (164.9 ± 8.19) than disturbed sites (59.14 ± 9.06), while in site 1018, it was 4.92 time higher in undisturbed sites (158.08 ± 12.28) than disturbed sites (32.14 ± 5.74). However, soil carbon stock was 1.12 and 1.25 times higher in undisturbed sites than disturbed sites in Ramsar sites 1017 and 1018, respectively. Future climate is predicted to decrease high carbon stock class by 2050 (4–8%) and 2080 (10–12%) under the two scenarios, but more so for SSP585 than for SSP245. At site 1017, future climate would cause a slight reduction (7.6%) compared to site 1018 where a higher reduction (52.6%) would be observed. Mangroves planting could help mitigating the predicted impact of future climate on carbon loss.