Why planting some trees could make global warming worse
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In Latin America, the rate of land and forest degradation inside protected areas more than doubled from 2004 to 2009, increasing from 0.04% to 0.10% per year. This is a small fraction but of a large number. Thus, in 2004 there were 81,975 hectares of land and forest degradation inside protected areas in Latin America, while in 2009, there were 247,056 hectares—an increase of approximately 165,000 hectares. Assuming each land and forest degradation event was unique (i.e., no change, regrowth and change again during the six years) and considering only the negative changes in land cover, the 2004–2009 land and forest degradation in our protected area data set was 1,097,618 hectares—an area the size of Jamaica.French Guiana and Guatemala experienced the most loss of natural characteristics in the studied preserves. Costa Rica, Mexico, Argentina, and Nicaragua suffered the least damage.
Numerous studies also document the cumulative impacts of post-fire logging on natural ecosystems, including the elimination of bird species that are most dependent on such conditions, compaction of soils, elimination of biological legacies (snags and downed logs) that are essential in supporting new forest growth, spread of invasive species, accumulation of logging slash that can add to future fire risks, increased mortality of conifer seedlings and other important re-establishing vegetation (from logs dragged uphill in logging operations), and increased chronic sedimentation in streams due to the extensive road network and runoff from logging operations.The environmentalists' letter, which is signed by 20, mostly West coast, advocacy organizations and is addressed to U.S. secretary of agriculture Tom Vilsack and U.S. secretary of interior Sally Jewell, highlights the likelihood that increased logging in disturbed areas of federal forests would contradict a recovery plan for the endangered northern spotted owl.