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| Content Provider | Springer Nature Link |
|---|---|
| Author | Holyoak, Marcel Koch Munz, Molly |
| Copyright Year | 2008 |
| Abstract | This study performed the first systematic evaluation of the success of habitat mitigation at establishing the threatened Valley elderberry longhorn beetle (Desmocerus californicus dimorphus) and its host plant, blue elderberry (Sambucus mexicana). Habitat mitigation performed through enforcement of the U.S. Endangered Species Act represents a tightly controlled form of habitat restoration, facilitating the evaluation of restoration practice. Restoration plantings of blue elderberry have been substantial in our study area, the Central Valley of California. Surveys of 30 mitigation sites and 16 nearby natural sites showed that mitigation sites were a fraction of the size of natural habitat areas (mean = 24%) and contained smaller shrubs. The beetle colonized 53% of mitigation sites and its populations were denser in sites with moderate levels of dead stems on elderberry shrubs, and moderate damage to elderberry stems and bark. This likely indicates that the beetle responds to stressed shrubs, which are likely to contain elevated levels of nitrogen. Beetle density also increased with the size and age of mitigation sites. This indicates a need to make restoration sites as large as possible and to monitor these sites for longer than current guidelines suggest, thereby allowing more time for convergence of natural and mitigation sites. Few factors examined here directly influenced the growth of elderberry shrubs, but elderberry grew more rapidly in sites closer to riparian areas, indicating that such sites should be favored for mitigation sites. |
| Starting Page | 444 |
| Ending Page | 457 |
| Page Count | 14 |
| File Format | |
| ISSN | 0364152X |
| Journal | Environmental Management |
| Volume Number | 42 |
| Issue Number | 3 |
| e-ISSN | 14321009 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2008-03-27 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Argentine ants Desmocerus californicus dimorphus Elderberry Irrigation Linepithema humile Mitigation Plant stress Restoration Sambucus mexicana Valley elderberry longhorn beetle Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Forestry Management Atmospheric Protection/Air Quality Control/Air Pollution Nature Conservation Ecology Environmental Management |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Pollution Global and Planetary Change |
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