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Article

Regeneration of Riparian and Maritime Pine Forests after a Large Wildfire on the Largest Public Forest of Portugal

1
Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
2
Cistus, Floresta e Ambiente, Lda, R. Dom Tomás de Almeida, 9, 2510-090 Óbidos, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Timothy A. Martin
Forests 2021, 12(4), 477; https://doi.org/10.3390/f12040477
Received: 19 February 2021 / Revised: 1 April 2021 / Accepted: 10 April 2021 / Published: 14 April 2021
Eighty-six percent of the largest Portuguese public forest, Leiria National Forest (Mata Nacional de Leiria—MNL), central west, was burned in a wildfire in October 2017. Most of the area was covered by maritime pine stands (Pinus pinaster Aiton) crossed by riparian forests along small-sized streams. This work aims to characterize the post-fire vegetation and evaluate its natural regeneration. Sampling was carried out c. 6 months after the fire in 28 plots distributed at pine stands (3.5 × 3.5 m2) and in 24 plots (5 × 20 m2) at stream channels and riverbanks. These latter surveys were repeated in 2019. Data include the floristic composition and cover data of pine stands and streams, and the number of pine seedlings. Six months after the fire, 60% and 93% of the pre-fire species were observed at streams and pine stands, respectively. Fire severity was not related to differences in flora composition, nor with species richness. Pine seedlings were significantly more abundant in pine stands >60 years old compared to younger (<25 y) stands, but no significant differences were observed in the regeneration of understory. On riparian landscapes, the germination and resprouting of invasive exotic species, such as Acacia sp., created dense vegetation formations with decreased native plant diversity and altered the ecosystem structure. Following large wildfires, such as the one in MNL, managers should prioritize preserving the natural regeneration potential in the soil and aerial seed banks. View Full-Text
Keywords: aquatic plants; Pinus pinaster; plant invasions; Mata Nacional de Leiria; Mediterranean climate; vegetation recovery aquatic plants; Pinus pinaster; plant invasions; Mata Nacional de Leiria; Mediterranean climate; vegetation recovery
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MDPI and ACS Style

Aguiar, F.C.; Rodrigues, C.; Pina, J.P.; Soares, P. Regeneration of Riparian and Maritime Pine Forests after a Large Wildfire on the Largest Public Forest of Portugal. Forests 2021, 12, 477. https://doi.org/10.3390/f12040477

AMA Style

Aguiar FC, Rodrigues C, Pina JP, Soares P. Regeneration of Riparian and Maritime Pine Forests after a Large Wildfire on the Largest Public Forest of Portugal. Forests. 2021; 12(4):477. https://doi.org/10.3390/f12040477

Chicago/Turabian Style

Aguiar, Francisca C.; Rodrigues, Carolina; Pina, João P.; Soares, Paula. 2021. "Regeneration of Riparian and Maritime Pine Forests after a Large Wildfire on the Largest Public Forest of Portugal" Forests 12, no. 4: 477. https://doi.org/10.3390/f12040477

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