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Direct seeding of Oreomunnea mexicana, a threatened tree species from Southeastern Mexico

Atondo Bueno, Edel Joshua | López Barrera, Fabiola [autor/a] | Bonilla Moheno, Martha [autor/a] | Williams Linera, Guadalupe [autor/a] | Ramírez Marcial, Neptalí, 1963- [autor/a].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Oreomunnea mexicana | Germinación de la semilla | Juglandaceae | Variación genética | Bosque secundario | Regeneración forestalTema(s) en inglés: Oreomunnea mexicana | Seed germination | Juglandaceae | Genetic variation | Secondary forests | Forest regenerationDescriptor(es) geográficos: Santuario de Bosque de Niebla, Xalapa (Veracruz de Ignacio de la Llave, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: New Forests. volumen 47, número 6 (November 2016), páginas 845-860. --ISSN: 1573-5095Número de sistema: 27434Resumen:
Inglés

Compared to enrichment planting techniques, direct seeding may represent a viable low-cost method to ensure the conservation and recovery of forest ecosystems. However, it is necessary to identify the environmental factors that affect seed germination and seedling establishment in order to improve the success of this technique. It has been suggested that the establishment of Oreomunnea mexicana (Juglandaceae), a threatened tropical montane cloud forest tree species, is associated with microsites of high soil moisture. We assessed seedling emergence in O. mexicana through direct seeding in a secondary forest and characterized the microenvironmental conditions of the sowing microsite. We also assessed the effect of seed hydration on seedling emergence and evaluated the effect of soil moisture content and seed hydration in O. mexicana seed germination and seedling emergence under laboratory conditions. Seedling emergence was lower in the field than in the laboratory (37 vs. 42 %, respectively). At microsite level, seedling emergence correlated positively with soil moisture content but negatively with vegetation cover. After 11 months, 52 % of the emerged seedlings still survived. Under laboratory conditions, seedling emergence did not differ significantly between hydrated and non-hydrated seeds (43.2 ± 0.52 vs. 40.3 ± 0.51 %, respectively), but did between high and low soil moisture contents (80 ± 0.18 vs. 3.5 ± 0.085 %, respectively). With appropriate soil moisture and vegetation cover conditions, O. mexicana seed introduction into secondary forest is a reliable technique. However, the method could be improved by protecting the seedlings from physical damage.

Recurso en línea: http://link.springer.com/article/10.1007/s11056-016-9548-2
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Disponible para usuarios de ECOSUR con su clave de acceso

Compared to enrichment planting techniques, direct seeding may represent a viable low-cost method to ensure the conservation and recovery of forest ecosystems. However, it is necessary to identify the environmental factors that affect seed germination and seedling establishment in order to improve the success of this technique. It has been suggested that the establishment of Oreomunnea mexicana (Juglandaceae), a threatened tropical montane cloud forest tree species, is associated with microsites of high soil moisture. We assessed seedling emergence in O. mexicana through direct seeding in a secondary forest and characterized the microenvironmental conditions of the sowing microsite. We also assessed the effect of seed hydration on seedling emergence and evaluated the effect of soil moisture content and seed hydration in O. mexicana seed germination and seedling emergence under laboratory conditions. Seedling emergence was lower in the field than in the laboratory (37 vs. 42 %, respectively). At microsite level, seedling emergence correlated positively with soil moisture content but negatively with vegetation cover. After 11 months, 52 % of the emerged seedlings still survived. Under laboratory conditions, seedling emergence did not differ significantly between hydrated and non-hydrated seeds (43.2 ± 0.52 vs. 40.3 ± 0.51 %, respectively), but did between high and low soil moisture contents (80 ± 0.18 vs. 3.5 ± 0.085 %, respectively). With appropriate soil moisture and vegetation cover conditions, O. mexicana seed introduction into secondary forest is a reliable technique. However, the method could be improved by protecting the seedlings from physical damage. eng

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