True or False: Trees
(CNN) -- True or False: More carbon dioxide is good news for trees as it will boost growth levels. The answer is: FALSE Trees evidently need carbon dioxide (CO2) to survive, and in some cases plant life can benefit from increased CO2, but over time more CO2 does not necessarily mean more life. Some experiments have found that exposing plants or trees to enhanced levels of CO2 have resulted in higher growth levels, but according to the New Scientist, these bursts in growth "have tended to level off within a few years" because of other factors, often related to water or nitrogen levels - and notably, temperature. Higher CO2 levels will bring climate changes to different regions which will have a direct impact on plant growth, to the extent that in some cases, any advantages increased CO2 levels may have on plant life could be counteracted by the impact of increased CO2 levels on the weather. This has been shown in the tropics, for example, where the majority of the world's rainforests lie. A study of rainforest plots in Panama and Malaysia found that an increase in temperature of 1 degree Centigrade actually reduced tree growth by as much as 50 percent.






Darien, Panama – A milestone in the history of forest conservation has been marked in the dense tropical rainforests of Panama’s eastern Darien region. As part of a sustainable forest management and trade project coordinated by WWF, the region’s first sustainable harvesting plan has been launched, ensuring that forest areas are cut in 25-year cycles. “This ensures that logging does not exceed what the forest can regenerate,” said Mauro Salazar, WWF Central America’s Forestry Director. Under the plan, a limited number of mature trees are harvested the first year in one forest area, cutting only four to five trees per hectare so that the forest’s ecological integrity is not harmed. The oldest seed-producing trees are not cut down so as to ensure the survival of the species. The following year logging would be allowed in a second area so that tree species in the first area could regenerate. A similar practice will continue in other areas throughout the forest over a 25-year logging cycle. When this cycle comes to an end, a new one will start again in the first area. This model is based on the “Forests Forever” concept which takes into account the principles and criteria of the Forest Stewardship Council, the world’s leading forest certification organization. (more)
By Susan Whitney for the
