Boughton, E.H. (corresponding author, email@example.com) & Quintana-Ascencio, P.F. (firstname.lastname@example.org): Department of Biology, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816, USA Nickerson, D. (email@example.com): Department of Statistics and Actuarial Science, University of Central Florida, 4000 Central Florida Blvd, PO Box 162370, Orlando, FL 32816, USA Bohlen, P.J. (firstname.lastname@example.org): MacArthur Agro-ecology Research Center, 300 Buck Island Ranch Road, Lake Placid, FL 33852, USA
Management intensity affects the relationship between non-native and native species in subtropical wetlands
Article first published online: 24 JAN 2011
© 2011 International Association for Vegetation Science
Applied Vegetation Science
Volume 14, Issue 2, pages 210–220, April 2011
How to Cite
Boughton, E. H., Quintana-Ascencio, P. F., Nickerson, D. and Bohlen, P. J. (2011), Management intensity affects the relationship between non-native and native species in subtropical wetlands. Applied Vegetation Science, 14: 210–220. doi: 10.1111/j.1654-109X.2010.01116.x
Co-ordinating Editor: Beth Middleton
- Issue published online: 1 MAR 2011
- Article first published online: 24 JAN 2011
- Received 15 October 2009, Accepted 19 November 2010
- Biotic resistance;
- Functional groups;
- Resource availability
Question: Does management intensity affect the association between non-native and native species and between non-native species and soil nutrients in wetlands?
Location: MacArthur Agro-Ecology Research Center, Florida, USA.
Methods: We evaluated native and non-native plant richness and relative frequency in 15 1-m2 plots in 40 wetlands across two types of pastures, highly managed (fertilized, ditched, planted, heavily grazed by cattle) and semi-natural (unfertilized, lightly seasonally grazed). Plant biomass was collected in five 0.25-m2 plots per wetland and sorted to species. Soil cores were collected to analyse soil total nitrogen (N) and phosphorus (P). An information-theoretic approach was used to compare mixed effects models considering the association of non-native richness, relative frequency, and biomass with native richness, relative frequency, biomass, C3 grass relative frequency (a dominant native group), N, P and wetland-type.
Results: Non-native richness was negatively correlated with native richness in semi-natural wetlands, but there was no evidence of an association between these variables in highly managed wetlands. Non-native richness increased with increasing soil N in semi-natural wetlands, but not in the highly managed wetlands. Soil P was positively related to non-native frequency in semi-natural wetlands but negatively related in highly managed wetlands. Non-native frequency and biomass were negatively related to relative frequency of C3 grasses in both management types.
Conclusions: Our results indicate that management intensity influences relationships between native and non-native richness. Management intensity interacts with abiotic or biotic factors, such as soil nutrients and composition, in predicting where non-native species will most likely need control.