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Papers by Christopher Dunn

Easily accessible lists of, and curatorial information about, living plant collections in the wor... more Easily accessible lists of, and curatorial information about, living plant collections in the world’s botanic gardens is essential for educational, scientific, horticultural, and other uses. To date, many gardens maintain databases to serve their institutional needs. With mounting global concerns about loss of biological diversity, it is essential that gardens develop ways to share essential information about their holdings without compromising any proprietary information. PlantCollections, a US federal-funded project intends to serve such a purpose. At present, 16 US institutions have entered into a collaborative project that will use the latest open-source technology to permit easy uploading of data to a common portal and searching of data by any user. The initial phase of the project will make available critical information on 47,000 accessions and 300,000 plant taxa. Ultimately, plant images can be accessed (via Morphbank) and distribution maps generated (via Google Map). When c...

The Oxford Handbook of Endangered Languages

Climate change is arguably one of the most pressing issues facing humanity. The implications for ... more Climate change is arguably one of the most pressing issues facing humanity. The implications for natural ecological (terrestrial and marine) and agricultural systems are enormous. The diminishment and extinction of native species and the increase in number and impact of invasive species are well documented. As natural systems are altered, the local communities and indigenous groups that have co-evolved with, and depend on, native plants and animals are challenged to maintain their integrity and livelihoods. Thus, the erosion of biological diversity can lead directly to the erosion of cultural and, thusly, linguistic diversity. Here the ramifications of climate change with respect to cultural and language endangerment are examined, with particular emphasis on island systems, ecological calendars, civil conflict, and migration. Strong mitigation and adaptation strategies will be essential for cultural and language survival.

The presettlement tree cover (1831 -33) of 3 townships in a southern Wisconsin landscape was anal... more The presettlement tree cover (1831 -33) of 3 townships in a southern Wisconsin landscape was analyzed using original survey records. Four forest types were identified: closed forest, open forest, savanna, and prairie. Comparisons of vegetation types and landscape pattern were made between the east and west sides of the Pecatonica River, which bisects the landscape and could have acted as a natural fire barrier. West of the river, presettlement tree species richness and diversity were lower and trees were smaller in diameter and less dense than to the east. The major vegetation types to the west were prairie of landscape) and savanna both fire-susceptibletypes. Prairie was more common on gentle slopes than on other landforms. To the east, the landscape was 70% forested (closedplus open forest). Here, prairie was more frequent on steep dry sites. These vegetation differences, including the contrasting landscape placement of prairie, are attributed to dis- tinct site characteristics an...

Ecological Studies, 1987

The vegetation of southern Wisconsin was a complex mosaic before settlement began in the 1830s (C... more The vegetation of southern Wisconsin was a complex mosaic before settlement began in the 1830s (Curtis 1959; Davis 1977; Finley 1976). The pattern of prairie, savanna, marshes, and forests responded to a number of site conditions and disturbance regimes that were themselves under the influence of climatic fluctuations (Kline and Cottam 1979) so that the mosaic was, itself, dynamic. Thus, the pattern of vegetation that the agricultural settlers encountered in the 1800s was the result of a unique history of interaction between vegetation, environment, and disturbance regimes. The settlers then commenced to remove a large fraction of the extant natural vegetation, and to fragment and subject the remainder to a markedly different disturbance regime. We expect that the forest remnants show the impact of both presettlement and postsettlement disturbance regimes in this landscape.

Ecological Studies, 1991

AGRIS record. Record number, US9126310. Titles, Methods for analyzing temporal changes in landsca... more AGRIS record. Record number, US9126310. Titles, Methods for analyzing temporal changes in landscape pattern. Personal Authors, Dunn, CP (Ball State University, Muncie, IN),Sharpe, DM,Guntenspergen, GR,Stearns, F.,Yang, Z. Publication Date, (1991). AGRIS Subj. Cat. ...

Science, 1996

1. Science. 1996 Jan 12;271(5246):132a. Corridors for Wildlife. Reed DF. PMID: 17793395 [PubMed -... more 1. Science. 1996 Jan 12;271(5246):132a. Corridors for Wildlife. Reed DF. PMID: 17793395 [PubMed - as supplied by publisher].

New Phytologist, 1990

... (Commelinaceae) BY CHRISTOPHER P. DUNN^ AND REBECCA R. SHARITZ^ ... association between the t... more ... (Commelinaceae) BY CHRISTOPHER P. DUNN^ AND REBECCA R. SHARITZ^ ... association between the two variables in self-thin-ning models (eg Mohler et al., 1978; Hutchings & Budd, 1981a). Because of problems using % EV in this way (Weiler, 1987; PM Dixon pers. ...

Bulletin of the Torrey Botanical Club, 1986

Page 1. BULLETIN OF THE T О RREY BOTANICAL CLUB Vol. 113, No. 2, pp. 142-148 April-June, 1986 Shr... more Page 1. BULLETIN OF THE T О RREY BOTANICAL CLUB Vol. 113, No. 2, pp. 142-148 April-June, 1986 Shrub layer response to death of Ultnus americana in southeastern Wisconsin lowland forests1 Christopher P. Dunn2,3 ...

Journal of Biogeography, 1988