Carbon storage and sequestration by urban trees in the USA. These data can be used to help assess the actual and potential role of urban forests in reducing atmospheric carbon dioxide, a dominant greenhouse gas. The national average urban forest carbon storage density is 25.1 tC/ha, compared with 53.5 tC/ha in forest stands. Urban forests in the north central, northeast, south central and southeast regions of the USA store and sequester the most carbon, with average carbon storage per hectare greatest in southeast, north central, northeast and Pacific northwest regions, respectively. Regions with the greatest proportion of urban land are the Northeast (8.5%) and the southeast (7.1%). Carbon storage within cities ranges From 1.2 million tC in New York, NY, to 19,300 tC in Jersey City, NJ. We comply with the Federal Trade Commission 1998 Children’s Online Privacy Protection Act (COPPA).Based on field data from 10 USA cities and national urban tree cover data, it is estimated that urban trees in the coterminous USA currently store 700 million tonnes of carbon ($14,300 million value) with a gross carbon sequestration rate of 22.8 million tC/yr ($460 rnillion/year). The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707. Forests emitted on average 8.1 billion metric tonnes of carbon dioxide and absorbed 16 billion between 20. New research has found that they sequester around twice as much carbon dioxide as they emit, classifying them as a carbon sink. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. Climate Change Forests are an important asset in the fight against climate change. This information is for educational purposes only. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. In other research done in the central and northern Great Plains, soil organic carbon increased significantly at 0-12 inches and 0-47 inches, with accrual rates of 0.5 and 1.3 ton carbon/acre/yr (equivalent to 1.8 and 4.7 ton CO 2/acre/yr), respectively. According to research conducted in Alabama, the ratio of root to shoot of carbon storage in switchgrass was 2.2 implying that carbon partitioning to roots played an important role in carbon sequestration by switchgrass. Switchgrass has massive root biomass (about 4 dry matter tons per acre) with rhizomes and can go up to 30 feet deep in soil so that it has good potential to sequester carbon in soil as roots decay. Switchgrass ( Panicum virgatum L.) is a native warm-season perennial to North America and has been used as an erosion control purpose on the road side or sometimes as livestock feed in Midwest or South. What is carbon sequestration potential of switchgrass as a bio-energy crop? If the soil erodes, the organic matter will be removed in runoff water.ģ. However, if the soil is tilled, soil organic matter will be oxidized and the carbon will be lost to the atmosphere as CO 2. If left undisturbed, soil organic matter can eventually be transformed into long-lasting humus. Organic matter also helps hold soil nutrients in place so that they are not lost during erosion, surface runoff or leaching. Higher levels of soil organic matter leads to more stable soil aggregates, better soil infiltration capability and aeration, better water holding capacity, more resistance to wind erosion, reduced potential for soil compaction and overall soil fertility. It helps bind soil mineral particles together into clumps, called soil aggregates. Soil organic matter consists of decomposed plant and animal matter. What is the role of soil organic matter in carbon sequestration? As the plants die or are harvested, the carbon based leaves, stems and roots decay in the soil and become valuable organic matter over time.Ģ. Carbon dioxide in the air is taken up by plants and incorporated into living plant matter. In the carbon sequestration process, bio-energy crops can be a sink by sequestering carbon since crops use a lot of carbon dioxide by the process of photosynthesis. Ocean sequestration: carbon can be stored in oceans through direct injection or fertilization, terrestrial sequestration: a large amount of carbon is stored in soils and vegetation, and geologic sequestration: natural pore spaces in geologic formations serve as reservoirs for long-term carbon dioxide storage. Carbon sequestration is a long-term process of storing carbon in oceans, soils, vegetation and geologic formations.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |