**Appendix 1: supplemental tables**

*4 David Ruppel (dsruppel@txstate.edu) and Tim Bonner (tbonner@txstate.edu).*

### **Table A1.**

*Data sources for stream-fish assemblage surveys compiled from 1983 to 2015.*


### **Table A2.**

*Collector descriptions used for the grouping factor in the detection model and the proportion of surveys.*


*HRU, hydraulic response unit; BUM, bullhead minnow; EMS, emerald shiner; FAM, fathead minnow; PLM, plains minnow; PRC, prairie chub; RRS, Red River shiner; RES, red shiner; SAS, sand shiner; SUM, Suckermouth minnow; UNDR, upstream network dam density; DL17, low flow duration variability; FH3, flood pulse count; MA2, median daily flow; RA9, variability of reversals; and TH2, annual maxima variability.*

### **Table A3.**

*Minnow detection model coefficients reported on the logit scale as the mode with an associated 90% highest density interval from the posterior distribution. The intercept is interpreted as estimated detection probability at mean levels of covariates. Each Covariate coefficient is interpreted with other covariates held constant.*
