IS DIRECT SEEDING A BIOLOGICALLY VIABLE STRATEGY FOR RESTORING FOREST ECOSYSTEMS? EVIDENCES FROM A META–ANALYSIS 1* 2 2 Eliane Ceccon , Edgar J. González , Carlos Martorell 1 * Correspondence author: Centro Regional de Investigaciones Multidisciplinarias - Universidad Nacional Autónoma de México (UNAM), Av. Universidad s/n, Circuito 2, 62210, Col. Chamilpa, Cuernavaca, Morelos, Ciudad Universitaria de la UAEM, México.
[email protected] 2 Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior S/N Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, D.F. México.
[email protected],
[email protected] This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/ldr.2421 This article is protected by copyright. All rights reserved. Summary Ecological restoration has become an important technique for mitigating the human impacts on natural vegetation. Planting seedlings is the most common approach to regain lost forest cover. However, these activities require a large economic investment. Direct-seeding is considered a cheaper and easier alternative technique, in which tree seeds are introduced directly on the site rather than transplanting seedlings from nurseries. To evaluate the effectiveness of direct seeding, we conducted a comprehensive search of the literature using ―restoration‖, ―direct seeding‖ and ―sowing‖ as keywords, and we performed a meta-analysis using 30 papers and 89 species. We used two different measures of restoration success: seed germination probability and success probability (the chance that a seed germinates and survives until the end of the experiment).