Project: Investigating the fern diversity of the Mascarene Islands
Supervisor: H. Schneider
Project: Molecular rate heterogeneity and evolutionary history in the Hymenophyllaceae
Supervisor: K Pryer
Research project: Systematics and evolution of the fern family Hymenophyllaceae
Teaching: Lectures, lab works, field courses and exams in plant biology and systematics, plant ecology, evolution and phylogeny
Data collect and development of a database of pines in France
Project: Phylogenetic systematics of the fern genus Hymenophyllum (Hymenophyllaceae)
Supervisor: J.-Y. Dubuisson
2004 Ph.D. Thesis in Botany, Université Paris 6, France, with the mention "Très Honorable"
1999 M. Sci. Biology and ecology program, Muséum National d'Histoire Naturelle, Paris, France
1997 B. Sci. Population and organisms biology programme, Université Paris 6, France
British Council Darwin Now Award to conduct fieldwork in Reunion and Mauritius (2009)
Edgar T. Wherry award for the best contributed paper, pteridological session, "Botany 2001", Botanical Society of America
Synthesys grant to conduct molecular biology lab work at the Natural History Museum, London (6 weeks- 2008).
NEScent funding (National Evolutionary Synthesys Center) for a short visit to Duke University (2007).
Post-doctoral research conducted at Duke University funded by an NSF CAREER grant attributed to Kathleen Pryer (DEB-0347840) (2005-2007)
Grant from the Linnean Society of London (Palaeobotany Specialist Group) for the participation to the symposium A life of ferns and gymnosperms, Montpellier (2006)
Grant from the French Ministry of Foreign Affaires for the participation to the international symposium "Ferns for the 21st century", Edinburgh, July 2004
Funding from the IFR 101 "Ecologie Fondamentale et Appliquée" and 1541 "Systématique" for molecular sequencing, a symposium in the US (2001) and field work in La Réunion (2002)
SYS-RESOURCE grant (European Commission's Improving Human Potential (IHP) Programme) for a stay at the Natural History Museum, London, and Royal Botanic Gardens, Kew, UK (2000)
Jean-Yves Dubuisson, UMR 5143 Paléobiodiversité et Paléoenvironnements, Universite Pierre et Marie Curie (Paris 6), France
Atsushi Ebihara, National Museum of Nature and Science, Tsukuba, Japan
Kathleen Pryer, Duke University, NC, USA
Germinal Rouhan, Museum National d'Histoire Naturelle, Paris, France
Marie Curie Intra-European Fellowship (2008-2010)
Hennequin S. Phylogénie et évolution chez les Hymenophyllaceae. Seminar "les jeudis d’Amap", Montpellier, 18 march 2008.
Hennequin S. Systematics and evolution in the filmy fern family, with special reference to Hymenophyllum. Botany Department seminar, Natural History Museum, London, UK, 6 february 2008
Dubuisson J.-Y., Reeb C., Hennequin S., Dajoz I. Hymenophyllaceae guild diversity and structure in Guadeloupe and La Réunion rainforests: comparative ecological and historical approaches. Botany 2006 , "Ecology of ferns" symposium, Chico, CA, USA, 28 July-3 August 2006.
Hennequin S., Pryer K., Schuettpelz E. & Dubuisson J.-Y. Investigating molecular rate heterogeneity and epiphytism diversification in the filmy ferns family. A life of ferns and gymnosperms, Montpellier, 6-8 April 2006.
Hennequin S., Pryer K., Schuettpelz E. & Dubuisson J.-Y. Fast and slow filmy ferns: molecular rate heterogeneity a chloroplast-wide phenomenon in the Hymenophyllaceae. XVII International Botanical Congress, Vienna, Autriche, 17-23 July 2005.
Hennequin S., Ebihara A., Ito M., Iwatsuki K., & Dubuisson J.-Y. Phylogenetic systematics and evolution of the genus Hymenophyllum (Hymenophyllaceae: Pteridophyta), contributed paper, Ferns for the 21st century, Edinburgh, UK, July 12-16, 2004.
Hennequin S. Phylogeny of Hymenophyllum s.l.: implications for morphology evolution and biogeography. Seminar of the Department of Biology, Duke University, Durham (NC, USA), August 2003.
Hennequin S. & Dubuisson J.-Y. Systematics of the fern genus Hymenophyllum s.l. (Hymenophyllaceae) inferred from rbcL and rps4 nucleotide sequences and morphology, contributed paper awarded, "Botany 2001" symposium, "Plants and People", Albuquerque, NM, USA, August 12-16, 2001, Abstracts n°342, p. 85.
I am particularly interested in studying evolutionary patterns and processes in seed-free plants. This involves reconstructing evolutionary relationships between lineages, or phylogenies, which can be used to understand morphological evolution, biogeography and adaptation to particular habitats. I am currently focused on a main project addressing the fern diversity in the Mascarenes islands, where both macroevolutionary and microevolutionary speciation processes are investigated. But different other subjects, all related to fern evolution, draw my attention.
This study focuses on the Mascarenes Islands, which together with Madagascar and several other smaller islands form the South West Indian Ocean hotspot of biodiversity and endemism. The objectives of this study are twofold: to investigate the patterns of fern diversification in the Mascarenes Islands, and to identify the processes creating this diversity. I particularly focus on two genera that are shown to have radiated on these islands: Asplenium and Cyathea.
Cyathea excelsa Sw. in La Reunion, an emblematic tree fern endemic to the Mascarenes © E. Grangaud
Asplenium daucifolium var. lineatum (Sw.) C.V. Morton, with propagules developing on the leaves © C. Chaussidon
The Hymenophyllaceae, or filmy ferns, are typically recognized by their very thin leaves and marginal sori. During my Ph.D. I studied one genus of the family, Hymenophyllum, which contains approximately 300 species. Based on the phylogeny inferred, a new classification for the genus was proposed. I was also especially interested in the evolution of morphological characters within the genus, and deciphering its complex biogeographical history is still underway.This requires broadening the taxon sampling of the inferred phylogeny and acquiring nuclear markers. I am also currently drawing my attention to the issue of chromosome numbers evolution in the genus, where very variable numbers are reported with n = 11, 12, 13, 14, 18, 21, 22, 26, 28, 36.
This project targets molecular rate heterogeneity between the two lineages of Hymenophyllaceae: hymenophylloids (= Hymenophyllum) and trichomanoids. We demonstrated that there is a slow-down in the molecular evolutionary rate in the hymenophylloids, and that this phenomenon occurs at the chloroplast level, but also seems to take place on the mitochondrion and nuclear levels. With a view to understanding the causes for this deceleration of rate, I investigated the evolutionary history in the family by estimating divergence times and by reconstructing the evolution of the different habitats found in the family (terrestrial, hemiepiphytic and epiphytic).
This project aims at understanding the ecological and historical parameters underlying the structure and diversity of hygrophilous forest in the two french islands of La Reunion and Guadeloupe. Filmy ferns are quite common in hygrophilous forests of these two geographical areas, and make an useful study group in order to compare both regions. I am still contributing to this project conducted by Jean-Yves Dubuisson, University Paris 6.
In relation to my project on the ferns from the Mascarene Islands, I am interested in reconstructing the evolutionary relationships of two main groups which are present of the islands and whose taxonomy is still to decipher. These are Nephrolepis, a worldwide genus of 19 species, 5 of them are reported for the Mascarenes, and the Thelypteridaceae, a very broad family with 20 species (belonging to 9 different genera) occurring in the Mascarenes.
Full preparation and organization of a botany-course (77h): lectures, lab works, exams
Lectures, lab works, field courses and exams in plant biology and systematics, plant ecology, evolution and phylogeny. B. Sci. and Master Sci.
Lab works and exams on Word, Excel and internet, 1st year bachelor degree.
Master and B. Sci. students at the Laboratoire de Paléobotanique et Paléoécologie, Paris 6