...the community of trees and shrubs in...
...energetic hypothesis. Many trees have small branch...
...40% of mature trees. The fungal disease...
...all the chestnut trees in eastern North...
...of American chestnut trees had a relatively...
...landscapes by felling trees and building dams....
...fire burns the trees, the cones open...
...from the burned trees, in sunlight no...
...blocked by taller trees. In the summer...
...grasses, shrubs, and trees sprout from seeds...
...replaced by forest trees. Early arrivals and...
...soil, killing the trees. Later, 300 years...
...several species of trees are dying from...

...and survival of trees in each plot,...
...influence microclimates. Forest trees moderate the microclimate...
...different species of trees. A log or...
...the distribution of trees expanded northward. A...
...branches and small trees, producing gaps that...
...burning, however, broadleaf trees tend to replace...
...grassland with scattered trees. Large herbivorous mammals...
...shrubs and small trees, with a diversity...
...strata of understory trees, a shrub layer,...
...The dominant deciduous trees in Northern Hemisphere...
...dwarf shrubs and trees. A permanently frozen...

...points about phylogenetic trees should be emphasized....
...genetic engineering. Phylogenetic trees played a role...
...researchers used phylogenetic trees based on DNA...
...from tall, twiggy trees to dense, ground-hugging...
...to construct phylogenetic trees. In an approach...
...In some phylogenetic trees, branch lengths are...
...In many phylogenetic trees, the branch lengths...
...absolute. In other trees, the branch length...
...possible, equally parsimonious trees. A tree that...
...to search for trees that are parsimonious...
...phylogeny, if the trees are based on...
...usually yield similar trees. Phylogenetic trees are...
...similar trees. Phylogenetic trees are hypotheses. Any...
...to revise their trees. Many older phylogenetic...
...ability of molecular trees to encompass both...