Alpha diversity; Beta diversity; Biodiversity; Biogeography; Ferns; Productivity; Tropical mountains; elevational gradient; Ecuador; Indonesia; island biogeography; Philippines, productivity
Karger D.N., Kluge J., Kessler M. (2016), Comparing species richness patterns of epiphytic and terrestrial ferns along elevational and latitudinal gradients, in Zotz G. (ed.), Springer, Berlin, 53-54.
Kessler M., Karger D.N., Kluge J. (2016), Elevational diversity patterns as an example for evolutionary and ecological dynamics in ferns and lycophytes, in Journal of Systematics and Evolution
, 54, 617-625.
Weigelt P., Kissling W.D., Kisel Y., Fritz S.A., Karger D.N., Kessler M., Lehtonen S., Svenning J.-C., Kreft H. (2015), Global patterns and drivers of phylogenetic structure in island floras, in Scientific Reports
, 5, 12213.
Karger D.N., Tuomisto H., Amoroso V.B., Darnaedi D., Hidayat A., Abrahamczyk S., Kluge J., Lehnert M., Kessler M. (2015), The importance of species pool size for community composition, in Ecography
, 38, 1243-1253.
Lehnert M., Coritico F.P., Darnaedi D., Hidayat A., Kluge J., Karger D.N., Kessler M. (2015), Validation of a new combination in the genus Alsophila (Cyatheaceae-Polypodiopsida)., in Systematic Botany
, 40, 386-386.
Karger D.N., Weigelt P., Amoroso V., Darnaedi D., Hidayat A., Kreft H., Kessler M. (2014), Island biogeography from regional to local scales: evidence for a spatially scaled echo pattern of fern diversity in the Southeast Asian archipelago, in Journal of Biogeography
, 41, 250-260.
Lehnert Marcus, Coritico F.P, Darnaedi D., Hidayat A., Kluge J., Karger D.N., Kessler M. (2013), Taxonomic and ecological notes on the Alsophila hornei complex (Cyatheaceae-Polypodiopsida), with the description of the new species A. phlebodes from New Guinea, in Systematic Botany
, 38, 875-886.
Karger Dirk N., Lehtonen Samuli, Amoroso Victor B., Kessler Michael (2012), A new species of Lindsaea (Lindsaeaceae, Polypodiopsida) from Mt. Hamiguitan, Mindanao, Philippines, in Phytotaxa
, 56, 15-20.
Karger Dirk N., Kluge Jürgen, Abrahamczyk Stefan, Salazar Laura, Homeier Jürgen, Lehnert Marcus, Amoroso Victor B., Kessler Michael (2012), Bryophyte cover of trees as proxy for air humidity in the tropics, in Ecological Indicators
, 20, 277-281.
Karger Dirk N., Kluge Jürgen, Krömer Thorsten, Hemp Andreas, Lehnert Marcus, Kessler Michael (2011), The effect of area on local and regional elevational patterns of species richness, in Journal of Biogeography
, 38, 1177-1185.
Understanding the causes determining the variation of community richness and composition is one of the longest standing and at the same time most current topics in ecological and biogeographical research. In the last two decades, exciting new theoretical (e.g., null models, local-regional relationships, mechanisms determining productivity-richness relationships) and methodological (e.g., molecular phylogenetics, fingerprinting) developments have opened whole new avenues for biodiversity research. Based on over a decade of research on diversity patterns of tropical ferns and lycophytes, I have developed a comprehensive research program that aims at applying these new approaches to ferns. This group of plants shows clearcut diversity patterns in tropical mountains and is of global distribution allowing for replicated studies. In the present project phase, I want to conduct two complementary subprojects. The first will use the natural experiment of islands of different sizes (100 - 780.000 km2) in the Philippines and Indonesia to evaluate the role of the regional species pool in determining the local diversity of fern assemblages. The second project will relate the local diversity of ferns to the productivity (energy availability) along an elevational gradient in Ecuador (500 - 4000 m). Together, these projects will allow an assessment of the degree to which the local diversity of ferns is determined by local ecological conditions, involving either resource availability or species interactions such as competition. In addition, the fertility status of the plants will be taken into account to assess the potential impact of dispersal (source-sink dynamics) on the observed richness patterns. Later phases of the overall project will apply molecular methods to study the evolutionary development of the fern assemblages analyzed in the present study and the population dynamics of the species, to add the historical/evolutionary component at different temporal scales.