# Importance of wind-dispersal in the invasion success of Pinus kesiya in Tapia forests in Madagascar

Herimino Manoa Rajaonarivelo, Olivier Flores, Bruno Ramamonjisoa, Jean-Marc Bouvet

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Herimino Manoa Rajaonarivelo, Olivier Flores, Bruno Ramamonjisoa, Jean-Marc Bouvet. Importance of wind-dispersal in the invasion success of Pinus kesiya in Tapia forests in Madagascar. Annual Meeting of the Association for Tropical Biology and Conservation (ATBC 2019), ATBC, Jul 2019, Antananarivo, Madagascar. 1 p. hal-05174196

HAL Id: hal-05174196

https://hal.science/hal-05174196v1

Submitted on 21 Jul 2025

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ATBC2019
Antananarivo
Madagascar

56th Annual meeting of the
Association for Tropical Biology and Conservation

Tropical Biology & Sustainable Development

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July 30 - August 3

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Antananarivo

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atbc2019.org

The ATBC is an international entity that promotes research, education, conservation, and communication in the field of tropical biology. To this end, annual meetings are organized with diverse academic institutions in different countries of the globe, representing various cultures and environmental settings.

**MADAGASCAR ATBC 2019** aims to gather researchers, students, and professionals in a range of scientific disciplines from around the world in order to provide an effective tool towards this common effort to harmonize biodiversity conservation and human well-being.

The meeting will provide an important and effective learning platform by addressing a wide range of topics and methods applied in the fields of tropical biodiversity, conservation, and environmental and social safeguarding. It will also be an opportunity for Malagasy researchers to disseminate their research findings and to highlight Madagascar's uniqueness biodiversity. In addition, Malagasy stakeholders will benefit from cutting-edge capacity building, through mutual sharing of knowledge and experiences at a global scale.

It will also be an occasion to raise awareness and draw the attention of Malagasy political leaders, civil society, private sectors, and the public about the need to preserve Madagascar's unique biodiversity, especially given that biodiversity is an important economic source that can increase the country's revenues in a sustainable development perspective.
# Importance of wind-dispersal in the invasion success of Pinus kesiya in Tapia forests in Madagascar

HERIMINO MANOA RAJAONARIVELO¹, OLIVIER FLORES², BRUNO S. RAMAMONJISOA³, JEAN MARC BOUVET⁴

1. Ecole Doctorale de Gestion des Ressources Naturelles et Développement, Antananarivo, Madagascar

2. Université de La Réunion

3. Ecole Supérieure des Sciences Agronomiques, Antananarivo, Madagascar

4. Centre de Coopération Internationale en Recherche Agronomique et Développement, Antananarivo, Madagascar

Malagasy endemic biodiversity is subject to several pressures that threaten their perenniality. The endemic sclerophyll Tapia woodland at Arivonimamo is one of those ecosystems threatened by the invasion of exotic reforestation trees, Pinus kesiya. In order to better preserve the Tapia woodland, the present study aims to determine the factors influencing the invasion of these species in this ecosystem to counter it. For achieving this purpose, 125 transects contained three plots of 100 m2 each have been inventoried. In each plot, dendrometry and environmental data were recorded. The geographic coordinates of Pinus source trees have also been noted in this area. The analysis of the main factors of invasion was carried out with the generalized linear model. The result shows that the installation of source trees nearby and spread by wind has the greatest influence on the various stages of Pinus invasion in the Tapia forest. Forest landscape management is then necessary to reconcile the need of the population and the conservation of this endemic biodiversity.