Percorrer por autor "El Baine, Chaimae"
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- Assessing Carbon Sequestration Potential in Chestnut Coppices Using the CO2Fix ModelPublication . El Baine, Chaimae; Patrício, Maria Sameiro; Nunes, Luis; Mohammed, YessefThrough effective forest management, chestnut coppices (Castanea sativa Mill.) can play a crucial role in carbon sequestration, offering a sustainable approach to mitigate climate change. This study focuses on assessing the carbon sequestration potential of chestnut coppices in northeastern Portugal using the CO2FIX model, a tool designed to estimate carbon dynamics in forest ecosystems. Data from a field trial of chestnut coppices, located in an area known as Cimas de Mogadouro, Castelo Branco Parish, Mogadouro Municipality, where different densities of shoots per stump were tested, were used to calibrate and validate the model. The research objectives included developing parameters to calibrate the CO2FIX model, aiming for more accurate predictions of biomass and carbon stock in chestnut coppices, as well as evaluating the model estimates against observed data to refine silvicultural management practices to promote biomass growth, carbon sequestration capacity, and the sustainability of coppice systems. The results indicated that higher shoot densities, particularly in the three- shoots (T2) and five-shoots (T3) treatments, led to notable increases in biomass production and carbon storage compared to lower shoot densities. Both T2 and T3 exhibited strong values in terms of biomass and carbon accumulation; however, T2 proved to be more effective, showing greater gains in total volume and Current Annual Increment (CAI) over time. The trunk was identified as the main component of biomass and, consequently, of carbon storage across all treatments evaluated, underscoring its importance in managing carbon dynamics. These findings provide valuable insights for improving silvicultural management strategies aimed at optimizing carbon storage in chestnut coppices. Additionally, they underscore the role of effective silvicultural interventions in enhancing ecosystem services, contributing to the broader goals of climate change mitigation and sustainable resource use. Overall, this study highlights how targeted forest management practices can effectively increase carbon sequestration in chestnut coppices. Through this work, it was possible to simulate total biomass production and its components, as well as the corresponding carbon sequestration, for 42-year rotations in chestnut coppices.
- Carbon sequestration in chestnut coppices: impact of shoot density simulated with the CO2Fix modelPublication . Patrício, Maria Sameiro; El Baine, Chaimae; Nunes, LuísThe carbon cycle plays a vital role in maintaining ecosystem stability by regulating the flow of organic matter and influencing global climate dynamics. However, rising CO₂ emissions from human activities have disrupted this balance, driving climate change and increasing the frequency of extreme weather events. Addressing this challenge requires strengthening natural carbon sinks, particularly forests, which store significant amounts of carbon in both biomass and soils. Sweet chestnut (Castanea sativa Mill.) coppice systems are promising for carbon sequestration due to their fast growth and potential for long-term carbon storage. Despite their ecological importance, many chestnut coppices remain unmanaged due to limited economic returns. Innovative strategies, such as payments for ecosystem services, could unlock their potential and enhance their contribution to climate change mitigation while promoting sustainable forest management.This study assesses the carbon sequestration and storage potential of sweet chestnut coppices using the CO₂FIX model, calibrated with field data from northeastern Portugal. The main objectives are to: Calibrate the CO₂FIX model to predict biomass and carbon stocks under different management practices. Validate model accuracy by comparing simulations with observed field data. Optimize parameterization to improved reliability for chestnut coppice systems. Identify growth constraints to support sustainable management strategies.
- Sequestro de carbono em castinçais: impacto da densidade de varas simulado com o modelo CO2FixPublication . Patrício, Maria Sameiro; El Baine, Chaimae; Nunes, LuísAs talhadias de castanheiro (Castanea sativa Mill.) podem potenciar o sequestro de carbono, contribuindo para a mitigação das alterações climáticas. Neste contexto, o presente estudo avaliou o potencial de sequestro de carbono em diferentes densidades de varas por touça, recorrendo ao modelo CO2Fix. O ensaio foi conduzido em Cimas de Mogadouro, no Nordeste de Portugal e compreendeu quatro tratamentos, avaliados ao longo de 12 anos. O modelo foi calibrado para simular a produção de biomassa e o correspondente sequestro de carbono numa rotação de 42 anos. Os tratamentos com três (T2) e cinco (T3) varas revelaram maior acumulação de biomassa e carbono, sobretudo na biomassa aérea e raízes. O tratamento T2 destacou‑se pelo maior acréscimo corrente anual e pela produção de varas com maiores diâmetros conferindo-lhes potencial de armazenamento de carbono em produtos de longa duração. A modelação mostrou‑se consistente nos tratamentos T1, T2 e T3, embora tenha subestimado o carbono no tratamento T4 (alto fuste) nas fases iniciais. Os resultados confirmam que, através de práticas silvícolas ajustadas, os castinçais funcionam como sumidouros de carbono eficientes, promovendo uma gestão florestal sustentável.