Quantifying relations between altered hydrology and fish community responses for streams in Minnesota

Ziegeweid, Jeffrey R.; Johnson, Gregory D.; Krall, Aliesha L.; Fitzpatrick, Kara; Levin, Sara B.

doi:10.1186/s13717-022-00383-z

Ecological Processes

Table 4 The two best regression models and fit statistics for six categories of fish-based biological metrics across three hydrologic datasets; see Table 1 for definitions of the biological metrics (response variables) and Table 2 for definitions of the hydrologic metrics (explanatory variables)

From: Quantifying relations between altered hydrology and fish community responses for streams in Minnesota

Biological category and rank	Biological response metric regression equation	Pseudo-R²	Censored values (%)	Root mean square error (%)
a. Hydrologic dataset: period of record (metrics calculated using data from 1945WY through year of biological sample collection), n = 54
Composition1	Centr.TolTxPct = 29.8 + 74.5ml22 − 0798dh21 − 0.0649ra4	0.601	16.7	6.61
Composition2	SuckerCatPct = 0.287ma39 + 0.00621mh3 − 1.24ma35 − 9.14	0.520	1.90	11.0
Habitat1	WetlandTxPct = 12.2 + 41.0ml20 − 0.00408mh3 − 0.751ra9	0.516	11.1	6.51
Habitat2	LargeRiverTxPct = 0.00581mh3 + 0.147mh13 + 1.21ra9 − 45.7	0.460	14.8	11.0
Life History1	LLvdPct = 152 + 0.0269ml4 − 0.615fl2 − 214th3	0.504	0.00	16.4
Life History2	SLvdTxPct = 4.37dh14 + 0.0596ra4 − 16.2	0.388	13.0	8.64
Reproductive1	SSpnTxPct = 21.9 + 0.372ma25 − 3.31ma40 − 0.0933ra3	0.566	3.70	6.16
Reproductive2	CompLithTxPct = 62.1 − 0.00630mh10 − 0.292dh7 − 0.0638tl1	0.458	5.56	8.58
Tolerance1	IntolerantTxPct = 0.451ma34 − 0.669dh10 + 0.354dh22 − 62.7	0.788	20.4	5.10
Tolerance2	SensitiveTxPct = 2.47fh7 − 0.601dh10 + 0.595dh24 − 126	0.744	0.00	6.04
Trophic1	GenFrimTxPct = 176 − 1.92ma38 − 51.2dl14 − 0.819phase	0.594	0.00	6.17
Trophic2	DetPlnkTxPct = 3.05 − 0.465ma34 + 0.594dh10	0.590	0.00	6.44
b. Hydrologic dataset: long-term change (ratio of calculated metrics: 1981WY through year of biological sample/1945-79WY), n = 39
Composition1	Centr.TolTxPct = 31.9 − 3.05mh2 − 24.5fh2 + 11.5ra9	0.688	15.4	6.07
Composition2	Percfm.TolPct = 104dl15 − 35.6ml15 − 20.9	0.642	0.00	15.0
Habitat1	MorFnotSH20.TolTxPct = 48.8 − 4.02dl5 − 34.8dh9 + 5.30ta3	0.720	2.60	3.94
Habitat2	LargeRiverPct = 31.2ma31 + 31.3ml4 + 48.3dh10 − 119	0.697	23.1	7.49
Life History1	SLvdTxPct = 0.598 + 11.6ml8 − 12.9mh21 + 4.23tl1	0.551	10.3	7.03
Life History2	MgrTxPct = 24.5ma31 + 337ar1 − 101phase − 232	0.504	0.00	7.34
Reproductive1	NestNoLithTxPct = 66.9 − 30.2fh1 − 19.7th2 + 15.8ra9	0.620	0.00	5.66
Reproductive2	PSpnTxPct = 20.6ma24 + 20.4mh21 − 16.8tl2 + 10.2	0.583	0.00	7.02
Tolerance1	IntolerantTxPct = 143 − 12.0ml3 − 47.5dh8 − 62.0phase	0.760	20.5	6.01
Tolerance2	SensitiveTxPct = 104 − 21.4ma33 − 26.1ml20 − 10.8dl5	0.697	0.00	7.02
Trophic1	OmnivoreTxPct = 22.0ma32 + 8.61ml21 + 4.58dl1 − 30.6	0.696	5.10	4.44
Trophic2	SWCGenTolTxPct = 10.7mh6 + 17.4fh5 + 13.5th2 − 39.9	0.694	12.8	4.92
c. Hydrologic dataset: short-term change (ratio of calculated metrics: last 10WY including year of biological sample/POR), n = 48
Composition1	SuckerCatPct = 21.3ma14 + 17.9ma24 − 28.1fh10 − 5.19	0.561	2.08	10.2
Composition2	Centr.TolTxPct = 29.5ma6 − 31.2fh6 − 40.9dh14 + 58.6	0.555	18.8	7.37
Habitat1	MorFnotSH20TxPct = 136dh24 − 9.94tl2 − 26.5amplitude − 83.8	0.514	2.08	5.90
Habitat2	Wetland.TolTxPct = 21.2ma38 + 18.2dh9 + 21.3ta1 − 52.2	0.472	14.6	5.26
Life History1	MgrTxPct = 81.3 + 34.6ma31 − 16.8ma40 − 71.6phase	0.513	0.00	7.48
Life History2	SLvdTxPct = 96.9 − 27.5ma26 − 24.3dh23 − 29.5th3	0.431	12.5	8.00
Reproductive1	MA.3TxPct = 50.9ma26 − 22.3dl9 + 25.2dh23 − 15.7	0.498	0.00	11.0
Reproductive2	CompLithPct = 86.5 − 61.1ma32 + 41.8dh7 − 37.6dh23	0.489	6.25	19.8
Tolerance1	IntolerantTxPct = 126 − 37.4ma32 − 36.8ta2 -32.0th1	0.646	22.9	6.58
Tolerance2	SensitiveTxPct = 97.9 − 25.9ma32 − 10.1mh7 − 30.3ta2	0.544	0.00	7.86
Trophic1	OmnCypTxPct = 16.2ma32 − 6.18ma7 + 7.70ml6 − 18.8	0.628	33.30	3.63
Trophic2	SdetTxPct = 29.2 − 17.2ma6 + 40.3ma32 − 16.1dh19	0.555	0.00	9.15

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