File Geodatabase Feature Class
Tags
Aquatic invasive species, AIS, Aquatic invasive plants, AIP, lake, control, Lake Tahoe
This dataset was compiled by Tahoe RCD to record the status of aquatic invasive plant control sites and document control work implemented at these sites. It includes data obtained from Tahoe RCD, TRPA, USFS, CTC, and California State Parks. This dataset is used to allocate resources and plan aquatic invasive plant control work in the Lake Tahoe Basin Region.
This shapefile contains records for aquatic invasive plant control projects in the Lake Tahoe Basin Region. This dataset does not include historic infesation sites. Points are generalized and in some cases multiple small, discrete populations may be grouped as a single control site for planning logisitics. Data should be interpreted with this in mind. Attributes are listed for aquatic invasive plant species detected at each location, plant (infestation) status, management status, and control methods implemented in 2019, 2020, 2021. Confirmation of species and status was obtained during contracted dive team during field visits. Development of status categories is ongoing and subject to change in future updates to this dataset.
Abbreviation Definitions:
EWM = Eurasian watermilfoil
CLP = curly-leaf pondweed
Species = Aquatic Invasive Plant Species
De = Detected
Contr= Control Methods
Manag_Stat = This attribute describes the management status of the infestation site. This status incorporates current treatment needed, diver effort, and current funding to prioritize planning efforts and future funding. This status does not indicate the amount of plants, level of establishment, or threat level of an infesation.
IP1 - Infestation Planning 1: Known or possible infestation. Information regarding the location may be insufficient, access to the site may be blocked, or a funding strategy for future treatment has not yet been established.
IP2 - Infestation Planning 2: Known infestation. Planning and/or procurement of funds are being actively implemented. Containment may be being implemented. Active control methods (barriers, diver-assisted suction, UV-C, or dredging) will likely be needed to treat this site.
I1 - Infestation Active Control 1: Known infestation. Active control methods (barriers, diver-assisted suction, UV-C, dredging, site preparation, or methods testing) were implemented over the course of the season.
I2 - Infesation Hand Removal 2: Previously treated control site that is at higher risk of reestablishment but only required hand removal to maintain the weed-free status. Over the course of one season, surveillance visits utilizing hand removal may require substantial effort (more than 1 gallons of plant material removed/more than a half day to complete). EDRR sites that are discovered and treated with only hand removal (and removed less than 1 gallon of AIP material) during the season will remain in this category until one additional season of surveillance places it into S1.
S1 - Surveillance Higher Risk 1: Previously treated control site. Over the course of one season, surveillance visits have resulted in the detection/removal of less than 1 gallon of aquatic invasive plant material. Each surveillance visit requires a half day or less to complete.
S2 - Surveillance Lower Risk 2: Historic infestation site. AIP have been treated and/or detected in this location. Consecutive surveys over the course of at least two years have shown no detections.
Plant_Stat - this attribute describes the status of the plant establishment at an infestation site. It is a binary attribute to distinguish between established infestations and infestations that have been completely treated and contain little to no plant.
Established Infestation = This indicates a location where aquatic invasive plants are known to be established. This is either because it has not yet been treated, it has only been partially treated, or a high volume of plants return after treatment. It does not indicate whether control work is currenlty taking place at this location.
Completely treated infestation, under surveillance = This indicates a location where aquatic invasive plants have been previously treated. Little to minimal regrowth has been documented.
Projection: NAD_1983_CORS96_UTM_Zone_11N, Transverse Mercator
Datum: D_NAD_1983_CORS96
Sara Matthews, Tahoe Resource Conservation District (Tahoe RCD)
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
Extent
| West | -120.160887 | East | -119.940946 |
| North | 39.248498 | South | 38.934631 |
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.