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Stream Bank Vegetation Survey

Stream bank vegetation influences . The amount of sunlight entering a stream, which controls photosynthesis and stream temperature. Affect stream flow and bank erosion. Important sources of organic material for aquatic organisms. Direct relationship between riparian vegetation and macroinvertebr

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Stream Bank Vegetation Survey

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    1. Stream Bank Vegetation Survey

    2. Stream bank vegetation influences The amount of sunlight entering a stream, which controls photosynthesis and stream temperature. Affect stream flow and bank erosion. Important sources of organic material for aquatic organisms. Direct relationship between riparian vegetation and macroinvertebrate community. Act as important buffers between upslope land use and the stream.

    3. Purpose of Vegetation Survey Create a data set that can be used by County and State agencies to monitor riparian buffers in Baltimore County.

    4. Purpose of Vegetation Survey Access the woody plant diversity of the stream bank Density: how many trees Which species are present Diversity Index Basal Area: % of area covered by trunk of tree Assess canopy closure over the stream

    5. Getting to know the plants Urban areas often have stands of trees, shrubs, and herbaceous plants A transect is a designated area in which plant diversity is assessed. This makes the task of identifying all the plants more manageable A permanent transect is placed at each school that has a stream. Long term monitoring site.

    6. Transect Design in relation to stream reach

    7. Transect Area 10,800 ft2 or 0.25 acres 1000 m2 or 0.1 hectare

    8. Dimensions of Transect

    9. Quadrants

    10. Measuring Canopy Trees Identify the species Take students to site and collect leaves, fruit, pieces of bark (if you have trouble identifying) Tree Identification guide Any field guide to trees Measure all trees in the transect that are larger than 3 inches in diameter.

    11. Measuring Dbh Measure diameter breast height dbh using the special measuring tape provided dbh is measured in inches

    12. Estimating Canopy Closure Over Stream  At the water’s edge, hold the densitometer perpendicular to the bank 1 ft. from the shoreline. Hold the densitometer as shown at right. A reading is obtained by leveling both of the densitometer’s bubble levels (centered between the two lines) and then sighting through the instrument so that the sighting marks (dot in the center circle) are aligned.

    14. Data Sheet

    18. Results: Vegetation Sampling

    19. Vegetation Analysis Age structure of population Dominant species Contribution of leaf litter to stream Biomass Productivity

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