TIPPC Plant Assessment Form

Transcription

1 TIPPC Plant ssessment Form For use with Criteria for Categorizing Invasive Non-Native Plants that Threaten Wildlands by the California Invasive Plant Council and the Southwest Vegetation Management ssociation Version February 2003, modified July 2009 for the Texas Invasive Plant & Pest Council Table 1. Species and Evaluator Information Species name (Latin binomial): Synonyms: Common names: Colocasia esculenta Colocasia antiquorum Elephant Ear Evaluation date (mm/dd/yy): 07/05/2011 Evaluator #1 Name/Title: ffiliation: Travis Gallo/Ecologist Phone numbers: address: The Lady Bird Johnson Wildflower Center ddress: 4801 La Crosse ve., ustin, Texas Evaluator #2 Name/Title: ffiliation: Phone numbers: address: ddress: Section below for list committee use please leave blank List committee members: Committee review date: List date: Re-evaluation date(s): General comments on this assessment: Originally assessed for the City of ustin Invasive Management Plan 1 TIPPC Plant ssessment Form

2 Table 2. Criteria, Section, and Overall Scores Species: Impact on abiotic ecosystem processes Impact on plant community Observational Impact on higher trophic levels U Observational Impact on genetic integrity D Observational Region: B Other Pub. Mat l Impact Enter four characters from Q below: BUD Using matrix, determine score and enter below: B Role of anthropogenic and natural disturbance Local rate of spread with no management Recent trend in total area infested within state B Other Pub. Mat l Observational Observational Innate reproductive potential Wksht Other Pub. Mat l Potential for human-caused dispersal Potential for natural longdistance dispersal Other Pub. Mat l Other Pub. Mat l Invasiveness Enter the sum total of all points for Q below: 18 Use matrix to determine score and enter below: Plant Score Using matrix, determine Overall Score and lert Status from the three section scores and enter below: Moderate No lert 2.7 Other regions invaded C Observational Ecological Distribution amplitude/range Other Pub. Mat l Using matrix, determine Distribution/Peak frequency Wksht C Other Pub. Mat l score and enter below: Documentation verage of all questions TIPPC Plant ssessment Form

3 Table 3. Documentation (List all references at end of PF. Short citations may be used in Table 3.) Impacts Question 1.1 Impact on abiotic ecosystem processes Identify ecosystem processes impacted: B Other Pub. Mat l back Extensive stands of this herb alter the vegetational structure and dynamics of riparian plant communities. Weber, Ewald Invasive plants of the World. CBI Publishing, CB International, Wallingford, UK. 548 pp. Question 1.2 Impact on plant community composition, structure, and interactions Observational back Identify type of impact or alteration: Creates monocultures along riparian areas and outcompetes native herbaceous riparian plants. Coupled with the invasive nutria, establishment of native plants in restoration is difficult. Elephant ear is toxic to nutria, therefore they eat only native herbaceous plants leaving the Elephant Ear to take over. Observational: T. Gallo, City of ustin, Watershed Protection Department environmental staff Question 1.3 Impact on higher trophic levels Identify type of impact or alteration: Unknown Unknown. Question 1.4 Impact on genetic integrity Identify impacts: No known hybridization with native species. Observational: Dr. Damon Waitt, Lady Bird Johnson Wildflower Center U Observational back D Observational back Invasiveness Question 2.1 Role of anthropogenic and natural disturbance in establishment Describe role of disturbance: Can establish in non-disturbed waterways. Other Pub. Mat l back Langeland, K.. and K.C. Burks Identification and Biology of Non-Native Plants in Florida's Natural reas. Florida Exotic Pest and Plant Council. ccessed 05 July 11: Question 2.2 Local rate of spread with no management Describe rate of spread: no information Can spread greater than doubling every 10 years with no management. Observational back 3 TIPPC Plant ssessment Form

4 Observational: Jackie Poole, Minnette Mar, & T. Gallo Question 2.3 Recent trend in total area infested within state Describe trend: no information B Observational back Since this species is still for sale, it will continue to colonize suitable habitat. Outside of the San Marcos River, there seems to be little management happening throughout the state. Observational: Jackie Poole Question 2.4 Innate reproductive potential Describe key reproductive characteristics: Refer to Worksheet Sources of information: Other Pub. Mat l back Langeland, K.. and K.C. Burks Identification and Biology of Non-Native Plants in Florida's Natural reas. Florida Exotic Pest and Plant Council. ccessed 05 July 11: Weber, Ewald Invasive plants of the World. CBI Publishing, CB International, Wallingford, UK. Question 2.5 Potential for human-caused dispersal Identify dispersal mechanisms: One of the most common plants sold as a pond plant. Other Pub. Mat l back National Biological Information Infastructure Online Elephant Ear. ccessed 06 July 11: d=true. Question 2.6 Potential for natural long-distance dispersal Identify dispersal mechanisms: Fragments are easily broken off and transported down waterways. Other Pub. Mat l back Langeland, K.. and K.C. Burks Identification and Biology of Non-Native Plants in Florida's Natural reas. Florida Exotic Pest and Plant Council. ccessed 05 July 11: Weber, Ewald Invasive plants of the World. CBI Publishing, CB International, Wallingford, UK. Question 2.7 Other regions invaded Identify other regions: C Observational back Has not invaded all riparian areas that could be invaded, but this aquatic invader does not fit the criteria for answering this question. Observational: T. Gallo Distribution Question 3.1 Ecological amplitude/range Other Pub. Mat l back Describe ecological amplitude, identifying date of source information and approximate date of introduction to 4 TIPPC Plant ssessment Form

5 the state, if known: Refer to Worksheet B Invaders of Texas Citizen Science Observations (ccessed 6 July 2011: &cn= USD PLNTS Database (ccessed 6 July 2011: COES) Question 3.2 Distribution/Peak frequency Describe distribution: Refer to Worksheet B Invaders of Texas Citizen Science Observations (ccessed 6 July 2011: &cn= USD PLNTS Database (ccessed 6 July 2011: COES) References Other Pub. Mat l back List full citations for all references used in the PF (short citations such as DiTomaso and Healy 2007 may be used in table above). Websites should include the name of the organization and the date accessed. Personal communications should include the affiliation of the person providing the observation. Enter each reference on a separate line; the table will expand as needed. Examples: Mitich, L. W Intriguing world of weeds: Tansy ragwort. Weed Technology. 9: HER. Date unknown. Emex spinosa. Hawaiian Ecosystems at Risk. ccessed March 17, 2009 DiTomaso, J. M. Personal communication from Dr. Joe DiTomaso, Dept. of Plant Science, UC Davis. received 3/17/09. Jackie Poole, Ph.D., State Botanist, Texas Parks and Wildlife Department. Minnette Marr, Botanist, Lady Bird Johnson Wildflower Center at the University of Texas at ustin. Travis Gallo, Ecologist, Lady Bird Johnson Wildflower Center at the University of Texas at ustin. Damon Waitt, Ph.D., Senior Botanist, Lady Bird Johnson Wildflower Center at the University of Texas at ustin. 5 TIPPC Plant ssessment Form

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7 Worksheet Reaches reproductive maturity in 2 years or less 1 Dense infestations produce >1,000 viable seed per square meter 0 Populations of this species produce seeds every year. 0 Seed production sustained over 3 or more months within a population annually 0 Seeds remain viable in soil for three or more years 0 Viable seed produced with both self-pollination and cross-pollination 1 Has quickly spreading vegetative structures (rhizomes, roots, etc.) that may root at nodes 1 Fragments easily and fragments can become established elsewhere 2 Resprouts readily when cut, grazed, or burned Note any related traits: Rhizome fragments are easily carried by streams, and floods can dislodge bud-laden rhizomes from the banks Notes for Worksheet B - Texas Ecoregions Question 3.1 Ecological amplitude Refer to the worksheet and select the one letter below that indicates the number of different ecological types that this species invades in your state.. Widespread the species invades at least three Level III ecoregions or at least 22 Level IV ecoregions. B. Moderate the species invades two Level III ecoregions 8 Level IV ecoregions. C. Limited the species invades only one Level III ecoregion and two to six Level IV ecoregions. D. Narrow the species invades only one Level IV ecoregion. U. Unknown. 7 TIPPC Plant ssessment Form

8 Worksheet B - Texas Ecoregions (Griffen et al, 2004). *. means >50% of type occurrences are invaded; B means >20% to 50%; C. means >5% to 20%; D. means present but 5%; U. means unknown Code Level III Level IV Score ER01 rizona/new Mexico Mountains Chihuahuan Desert Slopes Montane Woodlands ER02 Chihuahuan Deserts Chihuahuan Basins and Playas Chihuahuan Desert Grasslands Low Mountains and Bajadas Chihuahuan Montane Woodlands Stockton Plateau ER03 High Plains Rolling Sand Plains Canadian/Cimarron High Plains Llano Estacado Shinnery Sands rid Llano Estacado ER04 Southwestern Tablelands Canadian/Cimarron Breaks Flat Tablelands and Valleys Caprock Canyons, Badlands, and Breaks Semiarid Canadian Breaks ER05 Central Great Plains Red Prairie Broken Red Plains Limestone Plains ER06 Cross Timbers Eastern Crosstimbers Western Crosstimbers Grand Prairie Limestone Cut Plain Carbonate Cross Timbers Edwards Plateau Woodland ER07 Edwards Plateau Llano Uplift Balcones Canyonlands Semiarid Edwards Plateau ER08 Southern Texas Plains Northern Nueces lluvial Plains Semiarid Edwards Bajadas Texas-Tamaulipan Thornscrub Rio Grande Floodplain and Terraces ER09 Texas Blackland Prairies Northern Blackland Prairies Southern Blackland/Fayette Prairie Floodplains and Low Terraces Northern Post Oak Savanna ER10 East Central Texas Plains Southern Post Oak Savanna San ntonio Prairie Northern Prairie Outliers Bastrop Lost Pines Floodplains and Low Terraces Northern Humid Gulf Coastal Prairies B Southern Subhumid Gulf Coastal Prairies ER11 Western Gulf Coastal Plain Floodplains and Low Terraces Coastal Sand Plain Lower Rio Grande Valley Lower Rio Grande lluvial Floodplain Texas-Louisiana Coastal Marshes Mid-Coast Barrier Islands and Coastal Marshes Laguna Madre Barrier Islands and Coastal Marshes Tertiary Uplands ER12 South Central Plains Floodplains and Low Terraces Pleistocene Fluvial Terraces Southern Tertiary Uplands Flatwoods Red River Bottomland 8 TIPPC Plant ssessment Form

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