BIO 111 Chapter Notes - Chapter Workshop 2: Invasive Species, 18S Ribosomal Rna, Negative Feedback
Document Summary
Callaway et al 2004 soil biota and exotic plant invasion. Positive feedback occurs when plant species accumulate microbes near their roots have beneficial effects on the plants that cultivates them (leads to a loss of local diversity) Negative feedback occurs when plant species accumulate pathogenic microbes that creates increasingly hostile to the plant (leads to more community diversity by increasing species turnover rates) Sterilization of european soil lead to an 166% increase in the total biomass of an invasive plant compared to the 24% of the sterilized north american soil. Invasive plants are not invasive in their homes because they have strong negative feedback, but experience positive feedback from the soil in invaded land. Did a comparative analysis of soil microbial community structure between the french and north american soils by looking at partial 16s and 18s rrna gene: resulted with the invading species to culture microbes in different ways.
