NDLI: Near-Infrared Imaging Spectroscopy as a Tool to Discriminate Two Cryptic Tetramorium Ant Species

Content Provider	Springer Nature Link
Author	Klarica, Jasmin Bittner, Lukas Pallua, Johannes Pezzei, Christine Huck Pezzei, Verena Dowell, Floyd Schied, Johannes Bonn, Günther K. Huck, Christian Schlick Steiner, Birgit C. Steiner, Florian M.
Copyright Year	2011
Abstract	Correct species identification is a precondition for many ecological studies. Morphologically highly similar, i.e., cryptic, species are an important component of biodiversity but particularly difficult to discriminate and therefore understudied ecologically. To find new methods for their rapid identification, thus, is important. The cuticle’s chemical signature of insects often is unique for species. Near-infrared spectroscopy (NIRS) can capture such signatures. Imaging NIRS facilitates precise positioning of the measurement area on biological objects and high-resolution spatial capturing. Here, we tested the applicability of imaging NIRS to the discrimination of cryptic species by using the ants Tetramorium caespitum and T. impurum. The classification success of Partial Least Squares Regression was 98.8%. Principal Component Analysis grouped spectra of some T. impurum individuals with T. caespitum. Combined with molecular-genetic and morphological evidence, this result enabled us to pose testable hypotheses about the biology of these species. We conclude that discrimination of T. caespitum and T. impurum with imaging NIRS is possible, promising that imaging NIRS could become a time- and cost-efficient tool for the reliable discrimination of cryptic species. This and the direct facilitation of potential biological insight beyond species identification underscore the value of imaging NIRS to ecology.
Starting Page	549
Ending Page	552
Page Count	4
File Format	PDF
ISSN	00980331
Journal	Journal of Chemical Ecology
Volume Number	37
Issue Number	6
e-ISSN	15731561
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-05-03
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cuticular hydrocarbons Ant worker Infrared spectroscopy Chemical fingerprinting Entomology Biochemistry Ecology Biological Microscopy Agriculture
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry Ecology, Evolution, Behavior and Systematics

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