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International audience; Preserving tropical vegetation biomes stems with an accurate identification of constituent plant species. In Asia, identifying mangrove plant species is particularly required in biodiversity assessment, restoration or preservation programs, which are pivotal components of the ecosystem's preservation from unsustainable anthropogenic activities. The necessary rigour coming from botanical expertise, however, remains both insufficiently considered and unavailable for non-botanists including scientists, local communities and stakeholders of the coastal zone management. In this work, we will present a mobile application, working on both iOS and Android, that allows for the identification of 51 Asian mangrove species at your fingertips. We have based our approach on generic drawings covering the full range of botanical characters that guarantee the identification of mangrove species at both propagule and adult growth stages. The tool has been evaluated in situ by botanist and non-botanist scientists from different Asian countries. In the first instance, we will discuss difficulties in correctly identifying Asian mangrove species, especially, those from the same family, and the technical approach we chose to finally solve them. Then, subsequently, we will demonstrate how, with this app, we will be able to map mangrove species in tropical vegetation biomes with the objective of sharing accurate survey data on existing mangrove flora all around the world, year after year.

This report summarizes the proceedings of the “Mikoko1 project, conservation and resilience of Kenya’s mangrove forest scientific workshop and field visit” held in Lamu between 11th to 13th September 2019. The workshop was jointly organized by the Kenya Forestry Service (KFS), French National Research Institute for Sustainable Development (IRD) and French Agricultural Research Centre for International Development (CIRAD). This was with the support of the French Ministry for Europe and Foreign Affairs. The workshop brought together participants from national and county governments, local and international research institutions, community-based organizations, civil society groups andacademic institutions to learn more about the Mikoko Project and exchange experiences on mangrove conservation and restoration. The priorities and outputs identified at the workshop formed inputs into the activities that the project will focus on in the next 18 months.

International audience

International audience; Sustainable management of mangroves depends on our ability to maintain ecosystem functions. It requires a careful monitoring of several forest characteristics such as the species composition. Very high resolution multispectral satellite images provide pivotal information at the individual tree scale that may support identification and mapping of species of mangrove trees emerging at the canopy level. In this study, we showed that fine scale spectral responses of four common Asian mangroves species were and remained distinct over one decade and, independently of both the satellite sensors and the angular configurations of image acquisitions. We began an important radiative transfer modeling work to interpretation such promising observations

International audience; There is a need to document how fast mangrove coasts are changing. Within the framework of the INDESO project, we are implementing methods for monitoring changes in Indonesian mangroves over the past decade. The Perancak river estuary, Jembrana, Bali was selected as a pilot site to analyze the impact of aquaculture and plantation practices in a 7 km² mangrove area. During the 80’s, most of the mangrove forest was converted to shrimp ponds. However many of shrimp ponds have been abandoned since the 90’s and covered by mangroves through plantation programs. We based our analysis on a temporal series of VHR satellite images acquired from 2001 to 2014 aiming to assess the vegetation change over 13 years in the study site. We mapped and quantified the trends of evolution in mangroves in terms of surface extents, forest types and forest structure (young, adult, mature). Our results showed that the Perancak estuary is undergoing the greening, i.e. increasing extent and continuous growing of mangroves. With this approach, we proved that both sustainable and unsustainable coastal zone management practices such as mangrove deforestation, plantation or protection, can be identified and mapped from VHR satellite images

International audience; Objectives • To enrich the existing knowledge base (BIOTIK project*) on a major "hot spot" of biodiversity: the rain forests of Annamite Mountain range of Lao PDR, in the framework of the Inventory of biodiversity of forest canopies conducted in 2012 in Lao PDR under F. Hallé scientific direction, and also to participate to broader initiatives such as Pl@ntNet project**. • To translate the identification tool in the Lao language in order to contribute to the capacity-building in plant taxonomy in the country. • To transfer the identification system to touch pads, enabling plant identification and entering data directly in the field.

An architectural analysis of 3 Guianese species of hemi-epiphytes (Clusia cuneata, Clusiaceae, Ficus nymphaeifolia and Coussapoa latifolia, Moraceae) has been undertaken in order to determine the role of shoot reiteration in hemi-epiphyte plant construction and how it is related to spatial relationship with the host-tree crown. Two different patterns of shoot reiteration can ultimately be identified : arborescent forms (e.g. Ficus) or shrub-like ones (Coussapoa, Clusia). Each of these life-form categories allows the hemi-epiphytes here studied to use the available space differently. Thus, F nymphaeifolia succeeds in overshading its host-tree ; C. latifolia intercalates its branches inbetween those of its host-tree in a vertical way ; and C. cuneata colonises empty spaces through a more or less horizontal direction. Reflections on the classical concept of hemi-epiphytism as a life form are given. Moreover the evolutionary consequences of shoot reiteration in the transition from terrestrial to hemi-epiphytic forms are discussed., L’analyse architecturale de trois espèces hémi-épiphytes guyanaises Ficus nymphaeifolia (Moraceae), Clusia cuneata (Clusiaceae) et Coussapoa latifolia (Cecropiaceae), fait ressortir le rôle que joue le processus de réitération dans l’édification de la plante, et dans ses relations spatiales avec la cime de l’arbre support. Les modalités réitératives qui interviennent chez ces espèces, conduisent à la formation de différentes structures : arborescente dans le cas de Ficus et buissonnantes chez Clusia et Coussapoa. Ces comportements permettent aux hémi-épiphytes étudiés d’occuper différemment l’espace aérien. Quelques réflexions sont émises sur la notion d’hémi-épiphyte en tant que type biologique et sur les conséquences évolutives de la réitération dans le passage des Angiospermes terrestres à l’hémi-épiphytisme., Prosperi Juliana,Edelin Claude,Michaloud Georges. Modalités d’occupation de l’espace aérien par les hémi-épiphytes : le rôle de la réitération caulinaire. In: Revue d'Écologie (La Terre et La Vie), tome 50, n°2, 1995. pp. 167-187.

International audience

International audience

International audience

International audience

The identification of species in South Asia, as many parts of the world, is a major handicap for implementing the necessary measures recommended by the Convention on Biological Diversity (CBD). The drastic reduction in the number of taxonomists throughout the world and the permanent loss of their knowledge have made the task of ecologists all the more difficult. In India, the IFP contribution in various networks and processes to establish a national strategy for the conservation of biological diversity (NBSAP) allowed us to confirm a strong demand in this domain for: training, tools for training, diffusion of information, as well as new tools for capacity-building in taxonomy and environment, in conformity with the recommendations of the "Global Taxonomy Initiative" of the CBD secretariat. The objective of this computer-aided identification is to provide scientists working on subjects related to biological diversity with a software to help them to identify mangrove species In spite of missing information and, within certain limits, errors, and which can provide information as required by user. This is done entirely graphically by constituting an "Identikit picture". After identification, the user can access a descriptive file of the species where botanical terms are defined in a hypertext. The software, in this version, is able to identify about 60 species of mangroves (proper and associates) of South India and Sri Lanka. Besides botanical, ecological and geographical data, it will also include information on the multiple uses of these species by the local population. Devoted to non-specialists, it is expected to serve capacity-building for training and selftraining.

Par une approche architecturale, cette étude explore les modalités de croissance des hémi-épiphytes ligneux d'Amérique du Sud -Guyane et Venezuela-, appartenant à 4 genres : #Ficus$ (#Moraceas$), #Coussapoa$ (#Cecropiaceae$), #Clusia$ (#Clusiaceae$) et #Blakea$ (#Melastomaceae$). L'étude comporte d'une part, l'analyse de leur répartition en forêt primaire et d'autre part une description architecturale, de la germination jusqu'au stade adulte, de l'appareil caulinaire et du système racinaire aérien, de dix espèces les plus représentatives des hémi-épiphytes, en portant une attention particulière aux processus réitératifs. Les hémi-épiphytes présentent une tendance générale à la faible différenciation morphologique des axes qui s'oppose à une différenciation fonctionnelle marquée en ce qui concerne les sites d'apparition des racines adventives. Une autre originalité concerne le remplacement précoce du système racinaire primaire, et la présence d'une zone basale de la tige fortement renflée qui pourrait contribuer à l'émission des racines adventives pendant les phases d'installation. L'auteur montre le rôle de la réitération caulinaire et racinaire dans l'édification de la plante, et dans ses relations spatiales avec la cime de l'arbre hôte. Les modalités réitératives conduisent à la formation de différents formes de croissance : arborescente, buissonnante et lianescente, permettant aux hémi-épiphytes d'occuper différemment l'espace aérien. La survie de l'organisme dans la canopée, est résolue par la réitération différée -drageonnement, marcottage- qui permet à la plante de se maintenir et de se propager végétativement, notamment en cas de stress. Plusieurs aspects des hémi-épiphytes -architecture stéréotypée, mode de reproduction, diversité de niches écologiques- ont permis de dresser un parallèle avec les plantes pionnières... (D'après résumé d'auteur)