Plasticidade foliar de especies sob diferentes intensidades de luz em uma floresta urbana

Maria José de Holanda Leite

doi:10.48017/dj.v8i2.2465

Autores

Maria José de Holanda Leite Universidade Federal de Alagoas

DOI:

https://doi.org/10.48017/dj.v8i2.2465

Palavras-chave:

Características foliares, Características foliares, luminosidade, característica funcional, estresse ambiental, característica functional

Resumo

As características foliares das plantas são úteis para entender as mudanças na vegetação sob diferentes pressões ambientais, pois as espécies lidam com variações nos níveis de luminosidade durante o processo de sucessão ecológica. Assumindo que a disponibilidade de luz é um bom preditor da variação das características foliares, hipotetizamos que em ambientes com maior incidência luminosa, haverá maior variação nas características foliares (média e desvio padrão) em um fragmento de floresta tropical urbana. Após confirmar que as distâncias geográficas não influenciaram os valores dos índices de variabilidade foliar, foram construídos Modelos Lineares Mistos (LMMs) para verificar a influência da intensidade luminosa nas características foliares. Todas as características foliares avaliadas (AF = área foliar, TMSF = teor de matéria seca foliar, AFE = área foliar específica e Cc_massa = teor de clorofila) apresentaram menor variabilidade em A4<AB. A área com maior incidência de luz (A4<AB) apresentou menor variação no desvio padrão, o que pode indicar que as plantas neste ambiente estão sob influência de distúrbios, o que leva à redução da variabilidade. A luz não foi um bom indicador da variabilidade foliar. O AF, AFE, TMSF e Cc_mass, embora amplamente variáveis em termos morfológicos e fisiológicos, mostraram ter menor variação na área com maior incidência de luz e maiores perturbações, indicando que ambientes mais perturbados influenciam na diminuição da variabilidade foliar.

Métricas

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Biografia do Autor

Maria José de Holanda Leite, Universidade Federal de Alagoas

Vinculada à Universidade Federal de Alagoas.

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