BIO 468 Lecture Notes - Lecture 20: Bulk Density, Introduced Species, Lumbricidae
Document Summary
Talked about lodge pole pine and pine beetles. Showing that as more pine trees died there are less amounts of mycorrhizal fungi present. Loss of mycorrhizae will lead to a decrease amount of growth. Mycorrhizae in one study were being killed by another organism and the plant actual secretes enzymes that are shipped down to the fungi which protect the fungi from the other organism. This is the diverse mutual relationship present between plants and mycorrhizae fungi. March 15, 2016: bind soil particles together, creating water-stable aggregates. Earthworms are introduced species, and we can see where earthworms are introduced (fisherman are greatest vector) A second family of worms within the oligochatae. Replace lumbricids in acid or calcium deficient soils. Dense populations in acid forest soils (104 to 105 per m2) Clearly on earth, earthworms are important in agriculture, however, there is nothing unhealthy about having no earthworms.
