Laguna de Santa Rosa Ludwigia Control Project

Status Completed County Sonoma
Project Type Non-mitigation Location 38.35847° N, -122.73427° W Map
Project Area (Acres) 150.0 Last Updated 29 September 2021
Project Abstract This project controlled an infestation of the non-native invasive aquatic plant Ludwigia in two areas of the Laguna de Santa Rosa channel by mechanical removal and application of an herbicidal treatment.
Project Groups San Francisco Bay Joint Venture
Administrative Region San Francisco Bay Joint Venture - Jemma Williams, SFBJV

Project Identification

536 JV - Record Number

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Laguna de Santa Rosa Ludwigia Control None Enhancement Vegetation Management Seasonal Wetland Unknown/Unspecified 150.0 Completed Seasonal non-tidal

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
No Data


Laguna de Santa Rosa Ludwigia Control Completed 150.0
Laguna de Santa Rosa Ludwigia Control Completed No Data


DateTypeDescriptionSite Name
2008-09-30 Project end date
2004-01-01 Project start date


Contact Hattie Brown Laguna de Santa Rosa Foundation Not applicable/Unknown
Contact Wendy Trowbridge Laguna de Santa Rosa Foundation Not applicable/Unknown


None Enhancement SCC State Coastal Conservancy
None Enhancement Sonoma County Water Agency $740,000
None Enhancement WCB Wildlife Conservation Board $560,000
None Enhancement City of Santa Rosa $450,000
None Enhancement Marin-Sonoma Mosquito and Vector Control District $300,000

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
2013-10-03 6.1 The Farm Historic Ditch riverine non-confined 67
2013-09-27 6.1 Reservoir Slope forested slope 80
2013-09-24 6.1 Gallo Forest forested slope
2013-09-24 6.1 Gallo Island perennial/seasonal depressional 76
2013-09-20 6.1 Occidental Road Unit Slope 11 forested slope 87
2013-09-11 6.1 Occidental Road Unit depression middle perennial/seasonal depressional 77
2013-09-11 6.1 Occidental Road Unit depression south perennial/seasonal depressional 74
2013-09-11 6.1 Occidental Road Unit depression north perennial/seasonal depressional 68
2013-08-13 6.1 Occidental Laguna channeled wet meadow 81
2013-08-02 6.1 Lynmar Slope forested slope 88
2013-08-02 6.1 Ben's Slope forested slope 86

No files found.

How to Use the Habitat Development Curve

Habitat Development Curves (HDCs) are used to determine the developmental status and trajectory of on-the-ground projects to create, restore, or enhance California wetland and stream habitats. Each HDC is based on assessments of habitat condition for different age areas of one habitat type that in aggregate represent the full spectrum of habitat development. The assessments of condition are provided by expert applications of the California Rapid Assessment Method (CRAM). Visit the CRAM website for more information about CRAM.

For each HDC, reference condition is represented by areas of a habitat that consistently get very high CRAM scores, have not been subject to disruptive management practices, and exist within landscapes that are protected and managed for their natural conditions. The horizontal lines intersecting the top of an HDC represent the mean CRAM score and standard deviation of scores for 25 qualifying reference areas.

The age of a project is estimated as the elapsed time in years between the groundwork end date for the project and the date of the CRAM assessment. To add or update a groundwork end date, use the Project Events form in Project Tracker ( The minimum age in years of a non-project area, including any natural reference area, is estimated from all available local information, including historical maps and imagery, historical written accounts, and place-specific scientific studies of habitat development.

An HDC can be used to address the following questions:

  1. At what time in the future will the area of assessed habitat achieve the reference condition or other milestones in habitat development? The HDC can answer this question if the CRAM score for the assessed area is within the confidence interval of the HDC. The answer is the time in years along the HDC between the current age of the assessed area and the future date corresponding to the intersection of the HDC and the reference condition or other milestone.
  2. Is the area of assessed habitat likely to develop faster, slower, or at the same pace as most other areas of the same habitat type? The habitat area is likely to develop faster, slower, or at the same pace if the CRAM score for the area is above, below, or within the confidence interval of the HDC, respectively.
  3. What can be done to improve the condition of the habitat area or to increase its rate of development? HDCs by themselves cannot answer this question. Possible answers can be inferred by the following analysis that involves HDCs:
    1. Examine the HDC for each of the four CRAM Attributes;
    2. Identify the Attribute(s) scoring below the HDC;
    3. For any low-scoring Attribute, examine the component Metric Scores (note: the Metric Scores for any public CRAM assessment in the CRAM database can be obtained through EcoAtlas);
    4. Assume the low score of an Attribute is due to its low-scoring Metric(s);
    5. Consider modifying the design or management of the habitat area in ways that will sustainably increase its score(s) for the low-scoring Metric(s).

For more information about CRAM Attributes and Metrics, including their scientific rationale, see the CRAM Manual.

Display Habitat Development Curves For Wetland Type:

CRAM Site Scores