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| Content Provider | Springer Nature Link |
|---|---|
| Author | Lei, Thomas Nishikawa, Naoki Yamashita, Naoko |
| Copyright Year | 2016 |
| Abstract | Ligustrum lucidum, a tree native to China has naturalized in Japan where it is often planted in parks and along roads. Naturalized individuals in urban woodlands have uncertain competitiveness against native species, particular in light of the frequent pruning undertaken in these woodlands. We compared fitness-related traits of Ligustrum against two co-occurring native species: a pioneer tree (Mallotus japonicus) and an understory tree (Eurya japonica) under pruned and un-pruned settings. A growth experiments where we assessed the leaf and whole plant characteristics of the 3 species under two environments simulating forest edge and forest interior, and two pruning treatments (with or without) was conducted. Under simulated forest edge without pruning, Ligustrum had lower stem growth and A$_{max}$ (maximum photosynthetic rate) than Mallotus, suggesting that native species can competitively suppress invasive expansion. With pruning, however, Ligustrum resprouted vigorously in both spring and summer with significantly higher apical growth and total shoots than Mallotus and Eurya in forest edge and interior, respectively. Also, with similar A$_{max}$ between resprouts of Ligustrum and Mallotus, we see a reversal of competitive advantage in favor of Ligustrum in forest edge. In the forest interior, Ligustrum exhibited shade tolerant properties (i.e., A$_{max}$, chlorophyll a/b, and leaf density) similar to Eurya but had more resprout shoots, suggesting that the invader also maintains an advantage under low light. The competitiveness of Ligustrum clearly increased with human disturbance in the form of park pruning. Such management practice can inadvertently enhance the invasiveness of exotic species in urban settings. |
| Starting Page | 1103 |
| Ending Page | 1118 |
| Page Count | 16 |
| File Format | |
| ISSN | 10838155 |
| Journal | Urban Ecosystems |
| Volume Number | 19 |
| Issue Number | 3 |
| e-ISSN | 15731642 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2016-02-03 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Glossy privet Mallotus japonicus Eurya japonica invasive tree disturbance resprout ecophysiological fitness traits Urban Ecology Environmental Management Ecology Nature Conservation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Urban Studies |
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