School of Geography, Earth Science and Environment

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Full Professor of Biogeography

About me

I am a vegetation and landscape ecologist with a research focus on long-term vegetation dynamics, particularly on the complex interactions of natural and human-induced vegetation dynamics, disturbance regimes, biological invasions, and climate change.

I use long-term demographic studies, field experiments, and simple mathematical models to study how natural disturbances, biological invasions, fragmentation, conservation management and other human activities in forests, grasslands and other ecosystems influence plant population dynamics. My recent publications include works on plant diversity and dynamics of tropical montane rain forests in the Pacific islands and East Africa, the functional connectivity of calcareous grasslands in Central Europe (process-based evaluation of ecological networks), and the consequences of biological invasions. Most of my research has been carried out in the Pacific Islands, Central Europe (including the European Alps) and East Africa with grants and fellowships from the German Research Foundation (DFG), the German Ministry of Education and Research (BMBF), the German Academic Exchange Service (DAAD), the Volkswagen Foundation, and a number of other foundations and institutions, including NGO΄s and Governments.

I have assembled international (including multicultural) research groups, and have a strong background in applied ecology, including nature conservation, environmental planning, and political consulting. I contributed to the PIDF (Pacific Island Development Forum) committee "Agriculture and Forestry" in preparation for the 2015 Paris Climate Conference (COP21) and to the UN working group on Ecosystem-based Disaster Risk Reduction (Eco-DRR). Since 2005, I have been editor of the ISI-listed journal Endangered Species Research (ESR).

I am co-coordinator of the Pacific-Asia Biodiversity Transect Network (PABITRA), a member of IBS (International Biogeography Society), IAVS (International Association of Vegetation Science), IALE (International Association for Landscape Ecology), EGU (European Geosciences Union), GTOE (The Society for Tropical Ecology), and GFOE (Ecological Society of Germany, Austria and Switzerland), and a founding member of the Biogeography Working Group and the Mountain Ecology Working Group of the Society of German University Geographers (VGDH).

 

 

Current Research and Highlights

Current research & highlights

Upcoming event:

Apr 2018 - Crossing scales and disciplines to identify global trends in tree mortality. EGU (European Geosciences Union) General Assembly, Vienna, Austria. Organizers: Bloemen, J., Boehmer, H.J., Hartmann, H., Schuldt, B., Sanders, T.http://meetingorganizer.copernicus.org/EGU2018/session/27282

Just Published:

MERTELMEYER, L., JACOBI, J.D., BOEHMER, H.J. & MUELLER-DOMBOIS, D. (2018): Using very high-resolution aerial imagery to assess changes in canopy status of ‘Ohi‘a (Metrosideros polymorpha) forests on the Island of Hawai‘i. – In: Greller, Andrew M.; Fujiwara, Kazue; Pedrotti, Franco (Eds.) Geographical Changes in Vegetation and Plant Functional Types. Berlin – Heidelberg – New York: Springer.

DI LEO, M., RICO, Y., BOEHMER, H.J. & H.H. WAGNER (2017): An ecological connectivity network maintains genetic diversity of a flagship wildflower, Pulsatilla vulgaris. – Biological Conservation 212: 12-21.

Current Grants:

Hartmann H, Schuldt B, Boehmer HJ, Anderegg W, Sanders T (2017) Crossing scales and disciplines to identify global trends in tree mortality as indicator of forest health. Volkswagen Foundation, Germany.

Boehmer HJ, S Galvin, JH Lowry, N Rollings, G Keppel, SYF Lodhar, MJ Dyer, GC Hanson, S Gopaul  (2016-2019) Structure and dynamics of Viti Levu’s montane rainforest under impact of invasive alien ivory cane palm (Pinanga coronata). Research Council of the University of the South Pacific, Fiji.

Rollings N, HJ Boehmer, et al. (2016 – 2018) PTC Tradition and ICT – a powerful partnership for empowering Pacific island youth and community awareness of long-term environmental change. Pacific Telecommunications Council.

Postgrad student supervision at USP

Lodhar, Sherri (PhD, ongoing): Structure and dynamics of a Pacific submontane rainforest under impact of an alien understory tree invasion. The University of the South Pacific, Faculty of Science, Technology & Environment (FSTE).

Gopaul, Sunil (Master, ongoing): Abiotic effects of the invasive alien palm Pinanga coronata in the Colo-i-Suva Forest Reserve, Fiji. The University of the South Pacific, Faculty of Science, Technology & Environment (FSTE). (joint supervision with Dr Michelle McKeown, Landcare Research, NZ).

Longsworth, Leomar L. (Master, ongoing): Plant diversity, vegetation types and conservation importance of lowland forest fragments in Dreketi district, Vanua Levu, Fiji Islands. The University of the South Pacific, Faculty of Science, Technology & Environment (FSTE). (joint supervision with Dr Gunnar Keppel, University of South Australia).

Koroi, Iliesa (Master, ongoing): Reassessment of the flora and vegetation along an altitudinal transect on the slope of Mt. Korobaba, Rewa Province, Fiji. The University of the South Pacific, Faculty of Science, Technology & Environment (FSTE).

Hanson, Geon (Master, completed in 2017): Population structure, allometry, and spread of alien ivory cane palm, Pinanga coronata, in a protected forest landscape on Viti Levu, Fiji. The University of the South Pacific, Faculty of Science, Technology & Environment (FSTE).

Dyer, Michael (Honours, completed in 2016): The distribution of the invasive palm Pinanga coronata and its effects on native tree ferns in the Colo-i-Suva area, Viti Levu, Fiji. The University of the South Pacific, Faculty of Science, Technology & Environment (FSTE) & University of South Australia. (joint supervision with Dr Gunnar Keppel, University of South Australia).

Lowry, Brenda J. (Master, completed in 2016): Biogeography of invasive woody plants along a tropical urban-rural gradient in the Greater Suva area, Fiji. University of the South Pacific, Faculty of Science, Technology & Environment (FSTE).

Selected Publications

Hartmann, H., Schuldt, B., Sanders, T., McInnis-Ng, C., Boehmer, H.J., Allen, C.D., Bolte, A., Crowther, T.W., Hansen, M.C., Medlyn, B.E., Ruehr, N.K., Anderegg, W.R.L. (in press): Monitoring global tree mortality patterns and trends. – New Phytologist.

MERTELMEYER, L., JACOBI, J.D., BOEHMER, H.J. & MUELLER-DOMBOIS, D. (2018): Using very high-resolution aerial imagery to assess changes in canopy status of ‘Ohi‘a (Metrosideros polymorpha) forests on the Island of Hawai‘i. – In: Greller, Andrew M.; Fujiwara, Kazue; Pedrotti, Franco (Eds.) Geographical Changes in Vegetation and Plant Functional Types. Berlin – Heidelberg – New York: Springer.

DI LEO, M., RICO, Y., BOEHMER, H.J. & H.H. WAGNER (2017): An ecological connectivity network maintains genetic diversity of a flagship wildflower, Pulsatilla vulgaris. – Biological Conservation 212: 12-21.

AYNEKULU, E., AERTS, R., DENICH, M., NEGUSSIE, A., FRIIS, I., DEMISSEW, S., & H.J. BOEHMER (2016): Plant Diversity and Regeneration Dynamics in a Disturbed Isolated Afromontane Forest in Ethiopia. – Folia Geobotanica 51(2): 115-127.

SENBETA, F., SCHMITT, C.B., WOLDEMARIAM, T., BOEHMER, H. J. & M. DENICH (2015): Plant Diversity, Vegetation Structure and Relationship between Plant Communities and Environmental Variables in the Afromontane forests of Ethiopia. – SINET Ethiopian Journal of Science 37 (2): 113-130.

KEPPEL, G., MORRISON, C., MEYER J.-Y. & H. J. BOEHMER (2014): Isolated and vulnerable: the history and future of Pacific Island terrestrial biodiversity (invited paper). – Pacific Conservation Biology 20(2):136-145.

RICO, Y., BOEHMER, H. J. & H. H. WAGNER (2014): Effect of Rotational Shepherding on Demographic and Genetic Connectivity of Calcareous Grassland Plants. – Conservation Biology 28 (2): 467-477. DOI: 10.1111/cobi.12186.

RICO, Y., HOLDEREGGER, R. BOEHMER, H.J. & H. H. WAGNER (2014): Directed dispersal by rotational shepherding supports landscape genetic connectivity in a calcareous grassland plant. – Molecular Ecology 23 (4): 832-842. DOI: 10.1111/mec.12639

MUELLER-DOMBOIS, D. & H. J. BOEHMER (2013): Origin of the Hawaiian rainforest ecosystem and its transition states in long-term primary succession (invited paper). – Biogeosciences 10: 5171–5182. DOI 10.5194/bg-10-5171-2013.

BOEHMER, H. J., WAGNER, H. H., GERRISH, G.C., JACOBI, J.D. & D. MUELLER-DOMBOIS (2013): Rebuilding after Collapse: Evidence for long-term cohort dynamics in a monodominant tropical rainforest. – Journal of Vegetation Science 24: 639-650. DOI 10.1111/jvs.12000.

MUELLER-DOMBOIS, D., JACOBI, J. D., BOEHMER, H. J. & J. P. PRICE (2013): Ohia Lehua Rainforest. The story of a dynamic ecosystem with relevance to forests worldwide. – 278 p., Amazon Press.

WAGNER, H. H., RICO, Y., LEHNERT, H. & H. J. BOEHMER (2013): Process-based long-term evaluation of an ecological network of calcareous grasslands. – Ecography 36 (3): 374-382. DOI 10.1111/j.1600-0587.2012.07463.x

AYNEKULU, E., AERTS, R., MOONEN, P., DENICH, M., GEBREHIWOT, K. & H. J. BOEHMER (2012): Altitudinal variation and conservation priorities of vegetation along the Great Rift escarpment, northern Ethiopia. – Biodiversity and Conservation 21: 2691–2707. DOI 10.1007/s10531-012-0328-9

RICO, Y., BOEHMER, H. J. & H. H. WAGNER (2012): Determinants of actual functional connectivity for calcareous grassland communities linked by rotational sheep grazing. – Landscape Ecology 27: 199-209. DOI 10.1007/s10980-011-9648-5

BOEHMER, H. J. (2011): Vulnerability of tropical montane rain forest ecosystems due to climate change. – In: Brauch, H. G.; Oswald Spring, Ϊ.; C. Mesjasz, J. Grin, P. Kameri-Mbote, B. Chourou, P. Dunay, J. Birkmann (eds.): Coping with Global Environmental Change, Disasters and Security – Threats, Challenges, Vulnerabilities and Risks. Hexagon Series on Human and Environmental Security and Peace, vol. 5. 789-802. Berlin – Heidelberg – New York: Springer-Verlag.

BOEHMER, H. J. (ed., 2011): Biologische Invasionen (Special Volume on Biological Invasions). – Geographische Rundschau 63 (3). 66 pp, Westermann, Braunschweig.

AYNEKULU, E., DENICH, M., TSEGAYE, D., AERTS, R., NEUWIRTH, B. & H. J. BOEHMER (2011): Dieback affects forest structure in a dry Afromontane forest in northern Ethiopia. – Journal of Arid Environments. DOI 10.1016/j.jaridenv.2010.12.013

SCHMITT, C. B., DENICH, M., DEMISSEW, S., FRIJS, I. & H. J. BOEHMER (2010): Floristic diversity in fragmented Afromontane rainforests: Altitudinal variation and conservation importance. – Applied Vegetation Science 13: 291-304. DOI 10.1111/j1654-109X.01067

MINDEN, V., JACOBI, J. D., POREMBSKI, S. & H. J. BOEHMER (2010): Effects of invasive alien kahili ginger (Hedychium gardnerianum) on native plant species regeneration in a Hawaiian rainforest. – Applied Vegetation Science 13 (1): 5-14. DOI: 10.1111/j.1654-109X.2009.01056.x

MINDEN, V., HENNEBERG, K. J., POREMBSKI, S. & H. J. BOEHMER (2010): Invasion and management of alien Hedychium gardnerianum (kahili ginger, Zingiberaceae) alter plant species composition of a montane rainforest on the island of Hawai'i. – Plant Ecology 206: 321-333. DOI 10.1007/s11258-009-9645-9

SCHMITT, C., DENICH, M. & BOEHMER, H. J. (2010): Plant diversity and conservation of Afromontane rainforest with Coffea arabica in the Bonga region (SW Ethiopia). – In: X. van der Burgt, J. van der Maesen & J.-M. Onana (eds.), Systematics and Conservation of African Plants, pp. 679-690, Royal Botanic Gardens, Kew (Great Britain).

Contact me

Full Professor of Biogeography

Contact Information

Email:   juergen.boehmer(at)usp.ac.fj

Phone: +679-323-2542 (Secr.)

Office: Room 11, SGESE Building, Lower Campus

www.researchgate.net/profile/Hans_Juergen_Boehmer

www.linkedin.com/in/hans-juergen-boehmer-0aaa6583/


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School of Geography, Earth Science and Environment
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The University of the South Pacific
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