Aislados en islas biogeográficas: descubrimiento de una población disyunta de un helecho en el Bosque Atlántico del Nordeste

• Autores: Silva, Dennys Victor Souza e, Mendonça, Niksoney Azevedo, Barros, Maria Fabíola, Almeida, Thaís Elias, Santiago, Augusto César Pessôa
• Formato: artículo
• Fecha de Publicación: 2024
• Institución: Universidad Nacional Mayor de San Marcos
• Repositorio: Revistas - Universidad Nacional Mayor de San Marcos
• Lenguaje: inglés
• OAI Identifier: oai:revistasinvestigacion.unmsm.edu.pe:article/28802
• Enlace del recurso: https://revistasinvestigacion.unmsm.edu.pe/index.php/rpb/article/view/28802
• Nivel de acceso: acceso abierto
• Materia: Brejos de Altitude; Pico do Jabre; Pleopeltis pleopeltidis; Species conservation; Species distribution; Conservación; distribución

Brejos Nordestinos (northeastern highland wet forests) is a unique ecosystem within the Northeastern Atlantic Forest. This area encompasses remmants of humid forests above 600 meters in the semi-arid region. These environmental conditions create an optimal ecosystem for the diversification of plants, including ferns. Pico do Jabre in Paraíba state, with an elevation of 1,208 meters above sea level, is an example of Brejo Nordestino. This study reports the occurrence of Pleopeltis pleopeltidis in the Northeastern Atlantic Forest, particularly at Pico do Jabre, a new record of P. pleopeltifolia for Paraíba state, and the local fern flora. Additional records of P. pleopeltidis were found in the municipalities of Triunfo and Floresta, in Pernambuco state, which are also classified as Brejos Nordestinos with elevations exceeding 1,000 m a.s.l. These findings extend the species known extent of occurrence by approximately 40%. The conservation status of P. pleopeltidis is suggested as Vulnerable (VU) across its entire range and Endangered (EN) in Northeast Brazil. The distance between populations in the Northeastern Atlantic Forest and the nearest populations in Bahia state ranges from 763–931 km, indicating a potential disjunction. Although the species occurs in three relatively close Brejos Nordestinos, the fragmented nature of the Northeastern Atlantic Forest results in isolated populations on these biogeographical islands, surrounded by a Caatinga (seasonally dry tropical forest) matrix.