BIOL 1001 Lecture Notes - Lecture 15: Mycorrhiza, Cooksonia, Cyanobacteria
Document Summary
Distinguish between the fundamental and realized niche of a species. Range of condition and resources a population is capable of using. Symmetrical competition: affects both species, both species receives the same resources. Asymmetrical competition: one species suffers, has its fitness reduced, more than the other (predator for example) Larger is the host and the smaller is the symbiont. For each of the following mutualisms, describe the benefits each participant receives: Fungi is made up of filamentous hyphae which usually have a high sa:v ratio adapted for adsorption. Occasional branching mass of hyphae is called mycelium (roots) Most fungi form multicellular structures (mushrooms) composed of millions of hyphae. However, 30% of all known fungal species are plant parasites (+/- interaction) Mycorrhizae enable the first vascular plant to colonize without roots. Endophytes are micro-organisms living inside plant tissues without causing diseases or symptoms, some being beneficial to their host and approximately 1 million species of fungi including bacteria and protists.
