Though their leaves may be slow to rot, the trunks of oaks are frequently stricken with heartrot.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference

Be sure to check multiple-stemmed coppice trees for holes; they are particularly susceptible to heartrot.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference

Their trunks become riddled with heartrot, and as their inner wood softens, tree-hugging conks erupt on their bark.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference

Fires wound the base and trunks of forest trees severely so that they are exposed to serious destruction by heartrot.    From Wordnik.com.  [The School Book of Forestry] Reference

For nesting, it looks for older pines that are infected with red heartrot, a fungal disease that softens the interior, making nest digging easier.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference

There is a different bias (Heartwood Rot Bias) in which, if an author assigns chronological year 1 to year 1 of a core with heartrot (which are presumably mostly subfossil), you make the subfossil trees date younger than they really are and bias your MWP/modern comparison.    From Wordnik.com.  [Polar Urals and Yamal Mean Ring Widths « Climate Audit] Reference

heartrot, 228, 266.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference