UrbanTreeJusticeTrees are critical urban infrastructure, reducing heat and pollution and saving lives. So we have to fix this: "Neighborhoods with a majority of people of color have 33% less tree coverage than communities that are majority white, and neighborhoods with residents with 90% or more living in poverty have 65% less tree coverage than communities with 10% or less of the population in poverty. " #TreeJustice #UrbanTrees #ClimateJustice #EnvironmentalJustice
Planting new trees is too often offered as compensation for cutting down existing older trees. But compared with newly-planted trees, which often don't survive their 1st seasons, "large-diameter trees store disproportionally massive amounts of carbon" & provide much better habitat for biodiversity, resilience to drought and fire, and urban heat-reduction." The first emphasis should be on proforestation - protecting existing trees and forest https://www.frontiersin.org/articles/10.3389/ffgc.2020.594274/full #Proforestation #TreeJustice
Large Trees Dominate Carbon Storage in Forests East of the Cascade Crest in the United States Pacific Northwest
Large-diameter trees store disproportionally massive amounts of carbon and are a major driver of carbon cycle dynamics in forests worldwide. In the temperate forests of the western United States, proposed changes to Forest Plans would significantly weaken protections for a large portion of trees greater than 53 cm (21 inches) in diameter (herein referred to as “large-diameter trees”) across 11.5 million acres (∼4.7 million ha) of National Forest lands. This study is among the first to report how carbon storage in large trees and forest ecosystems would be affected by a proposed policy. We examined the proportion of large-diameter trees on National Forest lands east of the Cascade Mountains crest in Oregon and Washington, their contribution to overall aboveground carbon (AGC) storage, and the potential reduction in carbon stocks resulting from widespread harvest. We analyzed forest inventory data collected on 3,335 plots and found that large trees play a major role in the accumulated carbon stock of these forests. Tree AGC (kg) increases sharply with tree diameter at breast height (DBH; cm) among five dominant tree species. Large trees accounted for 2.0 to 3.7% of all stems (DBH ≥ 1” or 2.54 cm) among five tree species; but held 33 to 46% of the total AGC stored by each species. Pooled across the five dominant species, large trees accounted for 3% of the 636,520 trees occurring on the inventory plots but stored 42% of the total AGC. A recently proposed large-scale vegetatio...