Plant community dynamics relative to the changing distribution of a highly invasive species, <Emphasis Type="Italic">Eichhornia crassipes</Emphasis>: a remote sensing perspective |
| |
Authors: | Shruti Khanna Maria J Santos Erin L Hestir Susan L Ustin |
| |
Institution: | (1) Center for Spatial Technologies and Remote Sensing, University of California, Davis, CA, USA |
| |
Abstract: | Eradicating or controlling invasive alien species has frequently had unintended consequences, such as proliferation of other
invasive species or loss of ecosystem function. We explore this problem using a case study of a highly invasive floating aquatic
macrophyte, water hyacinth (Eichhornia crassipes), in the Sacramento-San Joaquin Delta of California. We used 5 years of remote sensing data to perform change detection analysis
to study plant community dynamics contemporaneous with changes in water hyacinth cover. Our results show that as water hyacinth
cover decreased, submerged aquatic plant (SAP) cover increased and vice versa. This effect was strongest in large patches
of water hyacinth. We found no evidence that the native floating aquatic species, pennywort (Hydrocotyle umbellata), benefitted from reducing cover of water hyacinth. In most years, pennywort cover either showed no trend or followed the
same trajectory as water hyacinth cover. In this study a decrease in cover of water hyacinth most often resulted in colonization
by SAP species with some habitat returning to open water. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|