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The Global Invasive Species Team | |
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Global Invasive Species Team listserve digest #023 Wed, 17 Feb 1999 12:40:34 -0800 (PST) --CONTENTS-- 1. A note on the Weeds Listserve 2. Prioritizing Japanese honeysuckle control 3. Colocasia esculenta in northwest Florida 4. More on native wildlife and alien plants --------------------------------------- 1. A note on the Weeds Listserve From: Barry Rice (bamrice(at)ucdavis.edu) A few of you have told me the listserve digests have been arriving too frequently. (Someone *even* used the harsh verb, "clogging".) We will experiment with sending the listserve digests out no more frequently than once every two days. --------------------------------------- 2. Prioritizing Japanese honeysuckle control From: Bob Merriam (bmerriam(at)tnc.org) Japanese honeysuckle probably covers more ground in N.C. than any other invasive. Why are we no longer so afraid of it under forest canopies? In clever experiments, Martina Keefe counted and identified all plants in sq. meter plots along transects on mixed hardwood forest floors. In the same plots she counted honeysuckle leaf pairs. She then plotted herb species OR number of stems as a function of honeysuckle density. Surprise! She found that up to 550-600 leaf pairs per sq. meter (the highest density found under a complete canopy), there was NO significant reduction of herb species or numbers. Result: Our management now focuses mainly on cutting the vine out of trees where it can damage or kill a tree. When the vine is too close to sensitive areas we selectively herbicide it with a back pack sprayer in the winter when it is one of the few green plants in NC, using 1.5% Roundup. --------------------------------------- 3. Colocasia esculenta in northwest Florida From: Candace Gerber (cgerber_tnc(at)nettally.com) A Conservancy neighbor (Torreya State Park) in Northwest Florida has problems with Colocasia esculent, also known as Wild Taro or Elephant Ear, invading wet/swampy areas. The park's current approach is yanking/digging it up - trying to get every bit of root as the darn stuff resprouts from next to nothing. Needless to say, this approach is very tedious and only minimally successful...any suggestions? Candace Gerber - The Nature Conservancy Northwest Florida Program --------------------------------------- 4. More on native wildlife and alien plants From: James F. Bergan (JBergan(at)TNC.org) The most recent work I am familiar with is a master's project supported by TNC (via TX Chapter and TNC's Wildland Weeds Program. One aspect of the project was to quantify habitat use and behavior of fall/winter migrant/resident birds in Chinese tallow (Sapium sebiferum) woodlands on the Texas coast. The project was conducted by Warren Conway at Texas Tech University. I was on the committee and have a copy of his thesis. The bird portion of the research should be getting published by the JFO. Please call me if you have questions.....Jim Bergan, 512/882-3584, Corpus Christi, TX --------------------------------------------------------------- |
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