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Recent Topics Posters

Woods, Teresa M. [1], Strakosh, Suzanne C. [2], Nepal, Madhav P. [1], Chakrabharti, Seemanti [3], Simpson, Nicholas B. [4], Mayfield, Mark H. [1], Ferguson, Carolyn [1].

Introduced species: floristic changes and patterns of collection based on an historical herbarium.

Herbaria with significant historical collections are critical to tracking floristic changes such as the introduction and spread of non-native plant species. To explore the importance of herbarium specimen data for understanding floristic changes in the central Great Plains, we utilized the Kansas State University Herbarium (KSC), known for its rich historical collections dating from the late 1800s. A list of all angiosperm plant taxa introduced to Kansas was obtained, and collection data were recorded for all in-state specimens (excluding cultivated material). A total of 6,565 specimens were recorded, comprising 314 species, 201 genera and 50 families, and dating from 1869. Of the recognized introduced species, 153 are represented by KSC collections made in Kansas prior to 1900, and 243 prior to 1940. All Kansas counties are well-represented by the early KSC material (1890s), bolstering our ability to infer floristic changes since that time. Peak collecting at KSC occurred in the 1890s and 1930s, and assessment of biases suggests that our data are a reasonably accurate representation of the presence and distribution of introduced species in Kansas at those times. Species not represented by pre-1900 KSC material were likely not established or even introduced in the state at the time; if a species was not documented prior to 1940 it was likely still not well established by then. This study demonstrates the utility of data housed at KSC, and by extension in other historical collections, for the study of regional floristic changes.


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1 - Kansas State University, Herbarium and Division of Biology, Ackert Hall, Manhattan, Kansas, 66506-4901, USA
2 - Kansas State University, Herbarium and Division of Biology, Ackert Hall, Manhattan, Kansas, Kansas, 66506-4901, USA
3 - Kansas State University, Department of Entomology, 123 Waters Hall, Manhattan, Kansas, 66506, USA
4 - Kansas State University, Division of Biology, Ackert Hall, Manhattan, Kansas, 66506-4901, USA

Keywords:
exotic species
Species Establishment
herbarium
floristic changes
historical data
biases.

Presentation Type: Recent Topics Poster
Session: 33-124
Location: Salon C, D & E - Gov Ballroom/Hilton
Date: Tuesday, August 16th, 2005
Time: 12:30 PM
Abstract ID:664


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