DNA metabarcoding effectively quantifies diatom responses to nutrients in streams Author Smucker, Nathan J. Author Pilgrim, Erik M. Author Nietch, Christopher T. Author Darling, John A. Author Johnson, Brent R. text Ecological Applications 2020 2020-12-31 30 8 e 2205 e 2205 journal article 310983 10.1002/eap.2205 39ba37ef-e0b6-4231-9ed4-9ffa650fb086 PMC7731896 32602216 15864071

TABLE 4. Results from boosted regression tree models for nonmetric multidimensional scaling axis 1 scores and for each diatom metric showing deviance explained as a percentage of the null deviance for observed data and of deviance explained using crossvalidated (CV) data (i.e., 10-fold cross-validation of data withheld to examine predictive performance), CV correlations between raw and fitted values, and relative importance of predictor variables.

				Relative importance (%)
Note: Mean + SE is presented for CV values.
Response	Observed deviance explained (%)	CV deviance explained (%)	CV correlation	TP	TN	Conductivity
NMDS axis 1	61	48 + 9	0.72 + 0.04	52	15	32
Low P diatoms	55	45 + 4	0.69 + 0.03	74	9	17
High P diatoms	64	49 + 5	0.71 + 0.03	57	19	24
Low N diatom	61	48 + 5	0.70 + 0.03	44	36	20
High N diatoms	50	32 + 7	0.60 + 0.03	39	40	21