This dataset was constructed to simulate the theoretical impacts of a disturbance on the abundances of 12 hypothetical species. Stations R1 to R3 illustrate changes in community richness, represented by the loss of species C and D (station R1), the appearance of species E and F (station R2), or both simultaneously (station R3). Stations S1 to S3 represent changes in community structure, expressed as a decrease in the abundance of species G and H (station S1), an increase in the abundance of species I and J (station S2), or both (station S3). Station D1 focuses on community dominance shifts, characterized by a strong increase in the abundance of species K and L. Station M1 combines all of these effects (loss, gain, structural shifts, and dominance changes). Reference stations REF1 and REF2 represent control sites, with alternating taxa showing normally distributed abundances (means of 50 and 10, standard deviation of 10% of mean). Species A and B are insensitive to impacts and act as tolerant taxa.
data(Simulated_data)A data frame with 50 rows (samples) and 12 species:
Species tolerant to different impacts, mean abundance = 50
Species tolerant to different impacts, mean abundance = 10
Species highly sensitive to impacts at stations A1, A3, and M1, leading to their disappearance, mean abundance = 50
Species highly sensitive to impacts at stations A1, A3, and M1, leading to their disappearance, mean abundance = 10
Species favored by impacts at stations A2, A3, and M1, leading to their appearance, mean abundance = 50
Species favored by impacts at stations A2, A3, and M1, leading to their appearance, mean abundance = 10
Species sensitive to impacts at stations S1, S3, and M1, leading to decreased abundance, mean abundance = 50
Species sensitive to impacts at stations S1, S3, and M1, leading to decreased abundance, mean abundance = 10
Species stimulated by impacts at stations S2, S3, and M1, leading to increased abundance, mean abundance = 50
Species stimulated by impacts at stations S2, S3, and M1, leading to increased abundance, mean abundance = 10
Species strongly stimulated by impacts at stations D1 and M1, leading to a shift in dominance, mean abundance = 50
Species strongly stimulated by impacts at stations D1 and M1, leading to a shift in dominance, mean abundance = 10
N. Chauvel