How did Paul Headley change the conditions in his Greenhouse to test cacao trees

Changes in species-specific relative stocking indicate the extent to which a species is either increasing or decreasing in a particular system. Changes in relative stocking values of commontree species in Kentucky from 1988 to 2004 were compared to values calculated for 1975 to 1988. Mean annual increase in relative stocking between 1988 and 2004 was greatest for ...

Pre-epidemic mortality rates for commonPhytophthora ramorum host tree species in California

Treesearch

T. M. Barrett

2006-01-01

Understanding the impacts of Phytophthora ramorum on forests will require knowledge of pre-disease distribution, abundance, and rates of change for affected species. This study estimated pre-epidemic mortality rates for nine common host tree species: bigleaf maple (Acer macrophyllum), California bay laurel (Umbellularia ...