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Authors
Abstract(s)
O solo desempenha um papel crucial na sustentação e manutenção dos serviços
ecossistémicos essenciais para a vida na Terra, sendo um sistema complexo em
constante formação e transformação, representando o maior reservatório de
carbono nos ecossistemas terrestres. Nesse contexto, a avaliação das
propriedades físicas e químicas do solo é fundamental para compreender o seu
estado de conservação e evolução. O presente estudo teve como objetivo avaliar
os efeitos da plantação de espécies autóctones nas propriedades físicas do solo
e no armazenamento de carbono na Reserva de Faia Brava, NE Portugal. As
amostras de solo foram coletadas em sete parcelas (0, 1, 2, 3, 4, 6, 7),
recentemente plantadas com espécies autóctones. Em cada parcela foram
estabelecidos aleatoriamente oito pontos de amostragem, quatro na zona
plantada (ZP) e quatro no solo original (SO), e colheram-se amostras nas
profundidades de 0-5, 5-10 e 10-20 cm. Após a coleta, as amostras foram
tratadas em laboratório e posteriormente foram realizadas análises de
permeabilidade, densidade aparente, porosidade (macro e microporosidade),
retenção de água (capacidade máxima para a água e capacidade de campo),
estabilidade da agregação (classes de agregados de 0,25 e 0,40 mm) e
armazenamento de carbono. A permeabilidade do solo manteve-se acima de 25
cm h-1, sendo classificada como muito rápida nas duas situações (ZP e SO). A
densidade aparente mostrou valores abaixo de 1,5 g cm-3
, tanto na ZP quanto
no SO. A porosidade, a capacidade máxima para a água, a capacidade de
campo e a estabilidade dos agregados da classe 0,25 mm apresentaram valores
significativamente superiores no SO. Também o armazenamento de carbono foi
superior no solo original, colocando em destaque os efeitos da mobilização do
solo no aumento da mineralização da matéria orgânica. Globalmente, a
instalação de espécies autóctones contribuiu para uma perda temporária da
qualidade do solo.
The soil plays a crucial role in supporting and maintaining ecosystem services essential for life on Earth, being a complex system in constant formation and transformation, representing the largest carbon reservoir in terrestrial ecosystems. In this context, the assessment of the physical and chemical properties of the soil is fundamental to understanding its conservation status and evolution. The present study aimed to evaluate the effects of planting native species on the physical properties of the soil and carbon storage in the Faia Brava Reserve, NE Portugal. Soil samples were collected in seven plots (0, 1, 2, 3, 4, 6, 7), recently planted with native species. In each plot, eight sampling points were established, four in the planted area (ZP) and four in the original soil (SO), and samples were collected at depths of 0-5, 5-10, and 10-20 cm. After collection, the samples were processed in the laboratory, and subsequent analyses were conducted on permeability, bulk density, porosity (macro and microporosity), water retention (maximum water-holding capacity and field capacity), aggregate stability (0,25 and 0,40mm aggregate classes), and carbon storage. Soil permeability remained above 25 cm h-1, classified as very fast in both situations (ZP and SO). Bulk density values were below 1,5 g cm-3 in both ZP and SO. Porosity, maximum water-holding capacity, field capacity, and stability of the 0,25 mm aggregate class showed significantly higher values in the SO. Carbon storage was also higher in the original soil, highlighting the effects of soil disturbance on increased organic matter mineralization. Overall, the establishment of native species contributed to a temporary loss of soil quality.
The soil plays a crucial role in supporting and maintaining ecosystem services essential for life on Earth, being a complex system in constant formation and transformation, representing the largest carbon reservoir in terrestrial ecosystems. In this context, the assessment of the physical and chemical properties of the soil is fundamental to understanding its conservation status and evolution. The present study aimed to evaluate the effects of planting native species on the physical properties of the soil and carbon storage in the Faia Brava Reserve, NE Portugal. Soil samples were collected in seven plots (0, 1, 2, 3, 4, 6, 7), recently planted with native species. In each plot, eight sampling points were established, four in the planted area (ZP) and four in the original soil (SO), and samples were collected at depths of 0-5, 5-10, and 10-20 cm. After collection, the samples were processed in the laboratory, and subsequent analyses were conducted on permeability, bulk density, porosity (macro and microporosity), water retention (maximum water-holding capacity and field capacity), aggregate stability (0,25 and 0,40mm aggregate classes), and carbon storage. Soil permeability remained above 25 cm h-1, classified as very fast in both situations (ZP and SO). Bulk density values were below 1,5 g cm-3 in both ZP and SO. Porosity, maximum water-holding capacity, field capacity, and stability of the 0,25 mm aggregate class showed significantly higher values in the SO. Carbon storage was also higher in the original soil, highlighting the effects of soil disturbance on increased organic matter mineralization. Overall, the establishment of native species contributed to a temporary loss of soil quality.
Description
Mestrado de dupla diplomação com a UTFPR, Universidade Tecnológica Federal do Paraná
Keywords
Solos Florestação e reflorestação Atributos físicos Armazenamento de carbono