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HomeMy WebLinkAbout20100408 Ver 1_Year 5 Monitoring Report_20160104Rudolph Buffer Mitigation Site Annual Vegetation Monitoring Report 2015 Growing Season Year 5 Monitoring Report Prepared by: Resource Environmental Solutions, LLC 302 Jefferson Street, Suite 110 Raleigh, NC 27605 Monitoring Field Work by: NCSU Water Quality Group Campus Box 7637 Raleigh, NC 27695 December 2015 TABLE OF CONTENTS 1.0 Summary..............................................................................................................1 2.0 Introduction 1 ......................................................................................................... 3.0 Vegetation Monitoring....................................................................................... 2 3.1 Success Criteria 2 ......................................................................................... 3.2 Description of Species and Monitoring Protocol .................................. 3 3.3 Results of Vegetation Monitoring........................................................... 3 3.4 Vegetation Observations.......................................................................... 5 3.5 Conclusions 5 Appendix A Site Photos Rudolph Mitigation Site Annual Monitoring Report for 2015 (Year 5) 1.0 SUMMARY The Rudolph Buffer/Nutrient Offset Site is located in southeast Johnston County, NC on the boundary with Wayne County, approximately eight miles west of Goldsboro, NC on Buckleberry Road (SR 2541). The site is located in the Neuse River Basin within the USGS HUC 03020201 and North Carolina Division of Water Quality (DWQ) sub -basin 03-04-02. The site is on an old floodplain terrace between Moccasin Creek and Raccoon Swamp. The site drains into Moccasin Creek before flowing approximately 2.25 miles into the Neuse River. Natural drainage patterns throughout the watershed have been altered by cultivation and dredging of the channels. The site is comprised of two parcels, the Worley Tract and the Kornegay Tract, totaling 116.9 acres. The proposed easement, including proposed Neuse riparian buffer mitigation and nutrient uptake, encompasses 44.63 acres. Within the proposed mitigation area, the channels drain surface water and groundwater from the surrounding row crop agriculture. The primary land use in the project vicinity is woodlands and corn production. Within the proposed conservation easement the primary land use was agricultural row crops; specifically corn production. There are also several small areas of bottomland hardwood trees and Conservation Reserve Program (CRP) pine plantation. The bottomland hardwoods about the downstream end of the drainage channels, but do not extend the full 200 feet from the top of bank. These areas are an assemblage of mature and successional trees. Beaver impoundments are flooding some of these areas. The CRP land is planted in successional pine trees, and will be removed from the CRP program prior to placement of the conservation easement. The maintained channel banks contain typical disturbed herbaceous species including soft rush (Juncus effuses), Japanese honeysuckle (Lonicera japonica), narrowleaf cattail (Typha angustifolia), woolgrass (Scirpus cyperinus), sedges (Carex sp.), and fescue (Festuca sp.). The monitoring results for 2015 (Year 5) documented an average of 392 surviving stems per acre and an average survival rate of 87%. The site has achieved the final vegetative success criteria of 320 live planted stems per acre at the end of Year 5. 2.0 INTRODUCTION A total of 44.63 acres of riparian area, including Neuse riparian buffers were restored on the Rudolph Mitigation Site. As specified in the Restoration Plan, the Rudolph Buffer/Nutrient Offset Site was planted with appropriate native species within the protected Neuse riparian buffer easement. The species selected consisted of native species observed in the surrounding forest and species know to occur in similar environments. The Neuse riparian buffer area was planted in bare root tree seedlings to achieve an initial density of 680 planted stems per acre. The objective of reforesting the buffer and riparian areas adjacent to channels is to provide water quality and habitat functions within the sensitive Neuse River watershed. PLANTING PLAN Revegetation of the site included planting bare root trees and controlling invasive species growth. The target communities were Coastal Plain Small Stream Swamp (Blackwater Subtype) along the channels grading to Bottomland Hardwood Forest downstream, and Mesic Mixed Hardwood Forest on the drier upslope. The communities were as defined by Schafale and Weakely (1990). The planting plan consisted of two planting zones. Zone 1 occupies the wetter, lower landscape areas, and Zone 2 occupies the drier, higher landscape areas. Near -channel areas are in the lower landscape areas. The initial planting of bare root trees occurred in February 2011. Tree species specified for planting on the Rudolph Site are shown in Table 1. Table 1. Tree Species Planted in 2011 Common Name Scientific Name Total Planted Percent Composition Zone 1 wet conditions River Birch Betula nigra 2,000 26.7% Green Ash Fraxinus pennsylvanica 1,100 14.7% Overcup Oak Quercus l rata 1,200 16.0% Willow Oak Quercus phellos 1,100 14.7% Bald C ress Taxodium distichum 2,100 28.0% Sycamore Platanus occidentalis Total Stems Planted 7,500 Zone Z mesic conditions Green Ash Fraxinus pennsylvanica 2,700 12.6% Sycamore Platanus occidentalis 2,700 12.6% Laurel Oak Quercus lauri olia 2,700 12.6% Swamp Chestnut Oak Quercus michauxii 2,700 12.6% Water Oak Quercus nigra 2,700 12.6% Cherry Bark Oak Quercus pagoda 1,800 8.4% Willow Oak Quercus phellos 3,500 16.3% Shumard Oak Quercus shumardii 2,700 12.6% Total Stems Planted 21,500 -- 3.0 VEGETATION MONITORING 3.1 Success Criteria Neuse riparian buffer vegetative success criteria are based upon the density and growth of target tree species as shown in Table 1. Vegetative success criteria will be based upon guidelines set forth in the Guidelines for Riparian Buffer Restoration prepared by the North Carolina Ecosystem Enhancement Program and will be defined as a success rate equivalent to 320 live planted stems per acre at the end of the 5 -year monitoring period. 2 3.2 Description of Species and Monitoring Protocol The following monitoring protocol was designed to predict vegetative survivability and response to different management treatments. Forty-eight plots in 8 different blocks were established on the Rudolph Buffer Mitigation Site, to monitor approximately 5% of the site. Sampled vegetation monitoring plots were 15m x 15m. The blocks were established within the Neuse riparian buffer site to represent the range of conditions that exist on the site. The blocks and plots were randomly located and randomly oriented within the buffer area. Plots were planted with a subset of tree species to specifically measure tree growth response (height and diameter) to different management techniques applied to the site including mowing, herbicide, fertilizer, mowing and fertilizer, herbicide and fertilizer, and an untreated control. The five species studied included B. nigra (Beni), F. pennsylvanica (Frpe), P. occidentalis (Ploc), Q. michauxii (Qumi), and T. distichum (Tadi). Plot construction involved using PVC pipe at each of the four corners to clearly and permanently establish the area that was to be sampled. Four PVC pipes ten feet tall were placed at each corner of the blocks to facilitate visual location of site throughout the five-year monitoring period. All of the planted stems inside the plot were flagged with surveyor flagging to help in locating them in the future. 3.3 Results of Vegetation Monitoring The following table presents stem counts for each of the monitoring plots. Each planted tree species is identified across the top row, and each plot is identified down the left column. The number of surviving stems within each plot is identified in the corresponding species data column. Table 2. 2015 Vegetation Monitoring Plot Species Composition Block- Plot Beni Frpe Ploc Qumi Tadi Total Stem per acre 1-1 5 5 5 5 4 24 432.4324 1-2 5 5 5 5 5 25 450.4504 1-3 5 5 5 5 5 25 450.4504 1-4 4 5 5 4 4 22 396.3973 1-5 5 5 5 5 5 25 450.4504 1-6 5 5 5 5 5 25 450.4504 2-1 2 3 2 3 0 10 179.8603 2-2 3 5 3 2 2 15 270.2708 2-3 2 5 3 3 2 15 270.2708 2-4 3 5 5 2 5 20 360.3603 2-5 5 4 5 3 4 21 378.3783 2-6 3 5 4 5 4 21 378.3783 3-1 5 5 5 2 5 22 396.3973 3-2 5 4 5 4 5 23 414.0414 3-3 5 4 5 5 4 23 414.0414 3-4 5 5 5 5 5 25 450.4504 3-5 3 4 4 3 4 18 324.3251 3-6 3 5 5 5 5 23 414.0414 4-1 3 5 2 3 2 15 270.2708 4-2 5 5 5 3 0 18 324.3251 4-3 3 4 2 5 1 15 270.2708 4-4 5 5 5 4 4 23 414.0414 4-5 5 4 5 4 5 23 414.0414 4-6 3 5 4 5 3 20 360.3603 5-1 4 5 5 3 5 22 396.3973 5-2 5 5 4 3 5 22 396.3973 5-3 5 5 5 2 5 22 396.3973 5-4 4 5 5 2 5 21 378.3783 5-5 5 5 5 4 4 23 396.3973 5-6 5 4 5 3 5 22 414.0414 6-1 5 4 3 3 5 20 360.3603 6-2 5 5 5 5 5 25 450.4504 6-3 5 5 5 4 5 24 432.4324 6-4 5 4 5 4 5 23 414.0414 6-5 5 5 5 5 5 25 450.4504 6-6 5 5 5 4 5 24 432.4324 7-1 5 5 5 5 5 25 450.4504 7-2 5 5 5 3 5 23 414.0414 7-3 5 5 5 4 5 24 432.4324 7-4 5 5 5 5 5 25 450.4504 7-5 5 5 5 5 5 25 450.4504 7-6 5 5 5 5 5 25 450.4504 8-1 5 5 5 4 5 24 432.4324 8-2 5 5 5 5 5 25 450.4504 8-3 5 5 5 2 5 22 396.3973 8-4 5 5 3 2 3 18 324.3251 8-5 2 5 4 3 4 18 324.3251 8-6 4 4 5 4 5 22 396.3973 Total 211 228 218 184 204 1045 -- Total (As -built) 240 240 240 240 240 1200 Average Stems/Acre: 392.1987 Percent Survival of Planted Stems: 87% Volunteer species were also monitored throughout the five-year monitoring period. Below is a table of the most commonly found woody volunteer species. Table 3. Volunteers within the Neuse riparian buffer Area ID Species Common Name FAC Status A Liquidambar styraciflua Sweetgum FAC+ B Acer rubrum Red Maple FAC C Pinus taeda Loblolly Pine FAC Naturally regenerating sweetgum and red maple seedlings were most abundant in Blocks 7 and 8 compared to other blocks. However, planted vegetation vigor was not affected by natural regeneration. 3.4 Vegetation Observations During this fifth growing season successional weeds such as dogfennel (Eupatorium capillifolium) were slowly being replaced by either planted trees, naturally regenerating trees and shrubs or dying off under tree canopy closure. There was only cursory mortality of planted trees during this growing season. Deer browse was again evident among many of the green ash trees (Fraxinus pennsylvanica). Deer browse of the ashes likely contributed to their mortality. Ditches were predominately lined with rushes, (Juncus spp.), sedges (Carex spp.), red maple, and elderberry (Sambucus nigra ssp. canadensis). No major invasive, exotic weed issues were observed. Native blackberry (Rubus argutus) was abundant in several plots throughout the entire planted area. 3.5 Conclusions The 2015 vegetation monitoring data reflects that the overall site has achieved the final vegetative success criteria of 320 surviving planted stems per acre by the end of Year 5. The planted vegetation at the end of this fifth growing season is 392 trees per acre. At present there are no invasive species issues to be addressed. Appendix A. 2015 Site Photos Block 1 -Rudolph Site Vegetation Plot 1 Plot 2. Plot 3. Plot 4. Plot 5. Plot 6. Block 2 -Rudolph Site Vegetation Plot 1 Plot 2. Plot 3. Plot 4. Plot 5. Plot 6. Block 3 -Rudolph Site Vegetation Plot 1 Plot 2. Plot 3. Plot 4. Plot 5. Plot 6. j AA40R l r NT - 19I� �* dppi' a i&ff.�'s,_. ��„x' •, 10. � � ��, Ij Block 6 -Rudolph Site Vegetation Plot 1 Plot 2. Plot 3. Plot 4. Plot 5. Plot 6. s 4 r9 m����;5� i B4': k