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Research
Interests
His
research interest lies at the interface of ecology and biogeography,
and involves a wide range of spatial scales.
In particular, he is interested in biodiversity,
biogeography, plant community ecology, and plant systematics. His
research in biodiversity focuses on the understanding of
biodiversity patterns at all spatial scales from the globe to the
microcosm. At a larger
scale, he is interested in searching for the factors that have
caused the current intercontinental patterns of vascular plant
species richness in the Northern Hemisphere.
At a smaller scale, he investigates how species coexist at
the community level. Because
many current patterns in biodiversity and geographical range exist
due to the phylogenetic history of the species or taxa at a higher
level, he is particularly interested in exploring how phylogenetic
relationships match global biodiversity patterns.
His biogeography work falls into both historical and
ecological biogeography. His
research in historical biogeography focuses on spatial pattern
analyses of the Northern Hemisphere vascular plants within and
between continents. He
has a keen interest in understanding the effect of tectonic plate
movement on the current biogeographical relationships among
continents. He is also
interested in knowing how current patterns in the geographical range
of vascular plants in the Northern Hemisphere are related to
phylogenetic (evolutionary) patterns across a wide range of
different taxonomic groups. His
research in the area of plant community ecology involves ecosystem
classification, the descriptive and correlative analysis of
vegetation - environment relationships, and species diversity
patterns at the community level.
He is especially interested in investigating similarities and
differences in a variety of community attributes such as structure,
species diversity, and the composition of functional types between
plant communities of similar climates in geographically widely
separate areas such as eastern Asia and eastern North America.
His recent work on plant systematics focuses on biodiversity
informatics. He
has authored over 40 papers published in various peer-reviewed
journals such as Am. Nat., Ann. Bot., Can. J. Bot., Int. J. Plant
Sci., J. Biogeogr., J. Veg. Sci., Nature, Oikos, Plant Ecol., Taxon,
and Vegetatio.
Recent
Publications
Qian, H. 2002. A comparison of the txonomic
richness of temperate plants in
East Asia and North America. American
Journal of Botany 89: 1818-1825.
Qian, H. 2002. Floristic relationships
between eastern Asia and North
America: test of Gray's hypothesis. American
Naturalist 160: 317-332.
Qian,
H. 2001. Floristic analysis of vascular plant genera of North
America north of Mexico: spatial patterning of phytogeography.
Journal of Biogeography 28:525-534.
Qian, H. 2001. A comparison of
generic endemism of vascular plants between East Asia and
North America. International Journal of Plant Science 162: 191-199.
Qian,
H. and R.E. Ricklefs. 2000.
Large-scale processes and the Asian bias in temperate plant species
diversity. Nature 407: 180-182.
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