Evaluation and Enhancement of Carbon Sequestration Potential of Existing Vegetation Along Roadsides

Giacomoni, Marcio H; Olivera, Francisco; do Lago, Cesar; University of Texas at San Antonio; Transportation Consortium of South-Central States (Tran-SET) University Transportation Center for Region 6

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Evaluation and Enhancement of Carbon Sequestration Potential of Existing Vegetation Along Roadsides

2019-08-01
Datasets Available
By Giacomoni, Marcio H ; Olivera, Francisco ; do Lago, Cesar

[PDF-786.20 KB]

English

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Creators:

Giacomoni, Marcio H ; Olivera, Francisco ; do Lago, Cesar

Giacomoni, Marcio H ; Olivera, Francisco ; do Lago, Cesar Less -
Corporate Creators:

University of Texas at San Antonio ; Transportation Consortium of South-Central States (Tran-SET) University Transportation Center for Region 6

University of Texas at San Antonio ; Transportation Consortium of South-Central States (Tran-SET) University Transportation Center for Region 6 Less -
Corporate Contributors:

United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; United States. Department of Transportation. University Transportation Centers (UTC) Program

United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; United States. Department of Transportation. University Transportation Centers (UTC) Program Less -
Subject/TRT Terms:

[+]

Carbon Carbon Capture And Storage Carbon Dioxide Evaluation Greenhouse Gases Highways Native And Non-native Plants Native Plants Right Of Way (Traffic) Roadside Flora Sequestration Soils
Publication/ Report Number:

18HSTSA01
Resource Type:

Tech Report
Geographical Coverage:

Texas ; United States

Texas ; United States Less -
Edition:

Final Report Mar. 2018 – Mar. 2019
Corporate Publisher:

Transportation Consortium of South-Central States
Abstract:

The objectives of this study were to evaluate the vegetative composition and carbon sequestration potential of vegetation along a major roadway in Texas. Soil and vegetation were evaluated along IH-35 within Bexar County for composition and carbon content. Three 20 m transects were placed at each site and percent vegetative cover was estimated and above ground plant biomass, and soil was collected from three 0.25 m2 subplots along each transect. Plant and soil samples were analyzed for carbon content. Two non-native grasses, bermudagrass and King Ranch bluestem, were the dominant cover at all sites accounting for > 90% coverage at several sites. Native plants were rare with only one species, western ragweed, accounting for > 5% mean coverage at all sites. Carbon content of plant species was highest for bermudagrass (699 kg C ha-1) and King Ranch bluestem (401 kg C ha-1), and 6 of 7 sites contained significantly more carbon in non-native plants compared to native plants. The highest native plant carbon content was western ragweed with an average of 15 kg C ha-1. Mean soil carbon content ranged from 3.1 to 6.9 kg C m3 -1 among the sites, and significantly (P < 0.05) greater amounts of carbon were recorded in the upper 0-10 cm compared to the 10-20 cm. The photosynthesis rates of Bermudagrass were significantly greater than rates recorded for King Ranch bluestem indicating the former species is highly adapted to hot semi-arid climate of central Texas, but King Ranch bluestem may gain a competitive advantage along roadways during the spring, fall and periods of increased precipitation. The total available area for the vegetation along the IH-35 highway in Bexar County is estimated to be approximately 81.7 ha (201.5 acres). We suggest the area between sites 5 and 6 (25.1 ha; 62 acres) are ideal locations for carbon sequestration using native plant communities including those with larger diameter woody stems such as trees.
Format:

PDF
Funding:

69A3551747106
Collection(s):

Transportation and Climate Change Collection University Transportation Centers
Main Document Checksum:

[+]

urn:sha256:53a1c8628d68395b5a538500cb10437a742a4a1769e4e7265f509e3f0b938527
Download URL:

https://rosap.ntl.bts.gov/view/dot/62594/dot_62594_DS1.pdf
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Evaluation and Enhancement of Carbon Sequestration Potential of Existing Vegetation Along Roadsides

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