Following a 3-year postdoctoral Fellowship (2011-2014) at the Xishuangbanna Tropical Botanical Garden (Chinese Academy of Sciences), I am now working as an associate professor at the Plant-Ecophysiology & Evolution group of the College of Forestry, Guangxi University, Nanning.
Biodiversity Genomics Team
In the Biodiversity Genomics Team we focus our research efforts on understanding the origin, rise and persistence of tropical plant biodiversity by combining the latest NextGen sequencing techniques and advances in genomics with molecular systematics, taxonomy, ecology and historical biogeographical reconstruction. Our study area covers the greater tropical Australasian zone and extends to include the flora of the Madagascar and Indian Ocean Island Biodiversity Hotspot.
Members of my team address a wide range of research topics, ranging from understanding the effects of palaeogeographic changes in landmass configuration on patterns of plant genome evolution and divergence, studying community assembly and in-situ plant diversification patterns on oceanic islands, to using genomic data to clarify the links between gene divergence, diversification and distribution, and employing the latest NGS techniques to resolve longstanding botanical and evolutionary questions typical for amorphic, speciose and widespread tropical tree families.
***Genomics, Diversification and Historical Biogeography of Tropical Asian Fagaceae***
Tropical Fagaceae in Asia occur from the foothills of the Himalayas, to the southern islands of Japan and eastward to Papua New Guinea and the Louisiade Archipelago. With over 600 species, in four genera, Fagaceae form an integral component of the tropical forests of Asia. Species can be found at all elevations, including the lowlands, but diversity is maximized at medium to high elevation zones, where Fagaceae dominate the forest system, or co-dominate, together with Lauraceae, Theaceae, Magnoliaceae and other families in a range of ecosystem conditions known as Laurisilva or Laurel forest. This set of environmental conditions spreads beyond the geographical distribution of tropical Asian Fagaceae, with Fagaceae being replaced by other plant families. In Australia and further south for example, Fagaceae are not present, but an ecologically similar forest type prevails dominated by Nothofagaceae, Myrtaceae, Winteraceae, Podocarpaceae and others.
My research on tropical Asian Fagaceae encompasses molecular systematics, molecular dating and historical biogeographical reconstruction. To this end, I use a combination of traditional Sanger sequencing and genomic sequencing techniques, in order to construct molecular datasets for selected regions of the chloroplast and nuclear genome. Together with collaborators, we develop new molecular markers from genomic data and move towards true comparative genomics in this large and ecologically important plant family. Molecular and morphological datasets are used in phylogenetic analyses to reconstruct the evolutionary history of tropical Asian Fagaceae, to assess lineage accumulation, progression of evolutionary rates over time and to evaluate the role of potential historical/environmental triggers in diversification of the family. Plant collecting missions, performed across the region in close collaboration with local institutes, are fueling additional projects leading to taxonomic revisionary work, evolutionary analyses of plant functional traits and the construction of interactive online keys for Lithocarpus, Castanopsis and Quercus. For more information of tropical Asian Fagaceae and my work on this family, visit http://www.asianfagaceae.com/.
***Plant diversification in the Madagascar and Indian Ocean Islands Biodiversity Hotspot***
Following work conducted as a Marie Curie PhD Fellow at the Laboratoire Evolution et Diversité Biologique (University of Toulouse, France), I continue to be involved in and develop studies on phylogeography, community assembly and diversification of plant lineages in the Madagascar and Indian Ocean Island biodiversity hotspot. Families with selected genera in past and current studies include Primulaceae, Monimiaceae, Asteraceae, Myrtaceae, Ebenaceae, Sapindaceae, Rubiaceae, Urticaceae and Rutaceae.
***Flora of Cambodia, Laos and Vietnam – Fagaceae***
It has been over nearly seventy years since a thorough treatment on Fagaceae of the Indochina region has been published. Since Lecomtes’ Flore Generale de l’Indochine and the monographs by Camus, many new species have been discovered, described and major changes have taken place in the family. In addition, groundbreaking advances in species identification, phylogenetic inference and biogeographic reconstruction using DNA have been made. With support from the Muséum National d’Histoire Naturelle (MNHN) in Paris (http://www.mnhn.fr/), the Royal Botanical Gardens (RBGE) in Edinburgh (http://www.rbge.org.uk) and local partner institutes and specialists in Vietnam, Cambodia and Laos, the project will see the creation of a new flora for the region on a major plant family. These efforts are strongly supported by ongoing molecular programs on Asian Fagaceae funded by Guangxi University, Nanning, China. For more information, please visit the project pages at http://www.asianfagaceae.com/fclv-fagaceae/.
Together with groups of researchers from the Ecological Evolution Laboratory (led by Dr. Yann Surget-Groba) and Community Ecology & Conservation Group (led by Dr. Kyle Tomlinson) of the Xishuangbanna Tropical Botanical Garden (Chinese Academy of Sciences) I am also involved in projects on the evolution and ecological significance of spinescence in plants, genomic adaptations to environmental gradients in tropical trees, adaptive vs. plastic responses across trophic levels by natural populations to environmental gradients and evolutionary analyses of plant functional traits in mangroves (latter project in this lab, led by Prof. Cao Kunfang more information here).
In addition, through other collaborations, I am taking part in studies on diversification of Dipterocarpaceae, Mallotus and Macaranga (Euphorbiaceae), Duguetia (Annonaceae) and Diospyros (Ebenaceae).
Institutes involved in sampling/sample exchange of tropical Fagaceae:
The extensive geographic distribution of Asian Fagaceae, their high diversity and the habitat in which we find them, combine to make the sampling and study of tropical Fagaceae an exceptional challenging activity. I am always interested to explore opportunities to work with new collaborators and expand the species number and geographic regions currently under study. If you are interested in collaborating or contributing material/data, please feel free to contact me!
Dr. Joeri S. Strijk
Plant Ecophysiology & Evolution Group, Room 124
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources
College of Forestry, Guangxi University
Nanning, Guangxi 530005
Email: jsstrijk <at> gxu.edu.cn
Research overview » http://www.plant-ecophysiology-evolution.com/people/joeri-sergej-strijk/
Research website» http://www.asianfagaceae.com/
ResearchGate » http://www.researchgate.net/profile/Joeri_Strijk/
LinkedIn » http://www.linkedin.com/pub/joeri-sergej-strijk/92/374/855/
Guangxi University » http://www.gxu.edu.cn/english/
Plant Ecophysiology & Evolution Group » http://www.plant-ecophysiology-evolution.com/
Curriculum Vitae: (pdf: please email me for the latest updated version!)
-T.Cvetković, D.D.Hinsinger, J.S.Strijk. 2017. The first complete chloroplast sequence of a major tropical timber tree in the Meranti family: Vatica odorata (Dipterocarpaceae). Mitochondrial DNA Part B 2 (1), 52-53.
-C.Hou, N.Wikström, J.S.Strijk, C.Rydin. 2016. Resolving phylogenetic relationships and species delimitations in closely related gymnosperms using high-throughput NGS, Sanger sequencing and morphology. Plant Systematics and Evolution 2016/8.
-D.D. Hinsinger, J.S. Strijk. 2017. The chloroplast genome sequence of Michelia alba (Magnoliaceae), an ornamental tree species. Mitochondrial DNA Part B 2 (1), 9-10.
-B.Ahmad, C.Baider, B.Bernardini, E.Biffin, F.Brambach, D.Burslem, J.W.Byng, M.Christenhusz, F.B.V.Florens, E.Lucas, A.Ray, R.Ray, E.Smets, N.Snow, J.S.Strijk, P.G.Wilson. 2016. Syzygium (Myrtaceae): Monographing a taxonomic giant via 22 coordinated regional revisions. PeerJ Preprints e1930v1.
-Jiang, G.-F., Hinsinger, D.D. & Strijk, J.S. 2016. Comparison of intraspecific, interspecific and intergeneric chloroplast diversity in cycads. Scientific Reports, 6, 31473.
-Hinsinger, D. D., & Strijk, J. S. 2016. Toward phylogenomics of Lauraceae: The complete chloroplast genome sequence of Litsea glutinosa (Lauraceae), an invasive tree species on Indian and Pacific Ocean islands. Plant Gene.
-John A.N. Parnell, Francesco Pilla, David A. Simpson, Peter van Welzen, Kongkanda Chayamarit, Pranom Chantaranothai, Peter C. Boyce, Paul Bygrave, Caroline Byrne, S. Chen, Charlotte Couch, T. Curtis, Soejatmi Dransfield, Brigitta E.E. Duyfjes, Wichan Eiadthong, Hans-Joachim Esser, Paul J. Grote, Zhu Hua, Matthew Jebb, Don W. Kirkup, Phan Ke Loc, Supree S. Larsen, J. Macklin, A. Madern, Conor Meade, Felix Merklinger, David J. Middleton, Justin Moat, A.Muthama Muasya, Pisut Nakmuenwai, Henrik Pedersen, Colin A. Pendry, Amornrat Prajaksood, Rachun Pooma, Kanchana Pruesapan, Carmen Puglisi, Apirada Sathapattayanon, Phiangphak Sukkharak, George Staples, Joeri Strijk, Somran Suddee, Sarawood Sungkaew, Kornkanok Tangjitman, Atchara Teerawattananon, Jantrararuk Tovaranonte, T. Ung, Anna Trias-Blasi, Willem J.J.O. De Wilde, Paul Wilkin, Tetsukazu Yahara. A re-examination of the life and work of A.F.G. Kerr and of his colleagues and friends, Thai Forest Bulletin, 43, 2015, p111-131.https://www.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/44243
-Hinsinger, D.D. and Strijk, J.S. 2015. Complete chloroplast genome sequence of Castanopsis concinna (Fagaceae), a threatened species from Hong Kong and southeastern China. Mitochondrial DNA. December 2015. doi:10.3109/19401736.2015.1110800
– Ren-Yi Ma, Jiao-Lin Zhang, Molly A. Cavaleri, Frank Sterck, Joeri S. Strijk, Kun-Fang Cao, 2015. Convergent evolution towards high net carbon gain efficiency contributes to the shade tolerance of palms (Arecaceae). Plos One 10(10): e0140384. doi:10.1371/journal.pone.0140384
– Parnell, J.A.N., Strijk, J.S., Maknoi, C., Trong, L.H., Pooma, R., Sirmongkol, S., Rueangruea, S., Tichai, W. & Ritphit, N. 2014. An expansion of the ranges of Christisonia siamensis Craib and Christisonia schortechinii Prain, the latter species new to Thailand, together with a revised key to Thai Orobanchaceae. Thai Forest Bulletin.
– Strijk, J.S., Rueangruea, S., Sirimongkol, S. and Suddee, S. 2014. Lithocarpus corneus (Lour.) Rehder (Fagaceae), a new record for the Flora of Thailand. Thai Forest Bulletin.
– Strijk, J.S., Sirimongkol, S., Rueangruea, S., Ritphet, N. and Chamchumroon., V. 2014. Lithocarpus orbicarpus (Fagaceae), a new species of Stone Oak from Phang Nga province, Thailand. PhytoKeys 34: 33–45. doi: 10.3897/phytokeys.34.6429
– Van Welzen, P.C., Strijk, J.S., Van Konijnenburg-van Cittert, J.H.A., Nucete, M. and Merckx, V.S.F.T. 2014. Dated Phylogenies of the Sister Genera Macaranga and Mallotus (Euphorbiaceae): Congruence in Historical Biogeographic Patterns? PLoS ONE 9(1): e85713. doi: 10.1371/journal.pone.0085713
– Strijk, J.S., Bone, Thébaud, C., Buerki, S., Fritsch, P.W., Hodkinson, T.R. and Strasberg, D. 2013. Timing and tempo of evolutionary diversification in a biodiversity hotspot: Primulaceae on Indian Ocean islands. Journal of Biogeography 41(4), 810–822. doi: 10.1111/jbi.12259
– Strijk, J.S., Noyes, R.D, Strasberg, D., Cruaud, C., Abbot, Chase, M.W. and Thébaud, C. 2012. In and Out of Madagascar: Dispersal to Peripheral Islands, Insular Speciation and Diversification of Indian Ocean Daisy Trees (Psiadia, Asteraceae). PLoS ONE 7(8): e42932. doi: 10.1371/journal.pone.0042932
– Bone, R.E., Strijk, J.S., Fritsch, P.W., Buerki, S., Strasberg, D., Thébaud, C., Hodkinson, T.R., 2012. Phylogenetic inference of Badula (Primulaceae), a rare and threatened genus endemic to the Mascarene Archipelago. Botanical Journal of the Linnean Society 169, 284-296. doi: 10.1111/j.1095-8339.2012.01221.x
– Renner, S.S., Strijk, J.S., Strasberg, D., Thébaud, C., 2010. Biogeography of the Monimiaceae (Laurales): a role for East Gondwana and long distance dispersal, but not West Gondwana. Journal of Biogeography 37, 1227-1238. doi: 10.1111/j.1365-2699.2010.02319.x
– Strijk, J.S. 2004. Description of the nest and nestling of Great Eared Nightjar Eurostopodus macrotis from Luzon, Philippines. Forktail 20: 128-129. PDF
– Van Weerd, M., Strijk, J.S. & Snelder, D. 2003. The importance of forest fragments for birds and local communities in Northeast Luzon, Philippines. Sylvatrop 13 (1&2): 1-30. PDF
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Impressions from the field:
All images © 2011-2017 J.S.Strijk
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Online Data Repositories:
Botanical Gardens, Research Institutes and DNA Banks:
Glossaries, Dictionaries and Conversion: