Ecological Archives A011-007-A3

Erik A. Lilleskov, Timothy J. Fahey, and Gary M. Lovett. 2001. Ectomycorrhizal fungal aboveground community change over an atmospheric nitrogen deposition gradient in Alaska. Ecological Applications 11: 397-410.
 

Appendix C. Correlations of predictor variables with ectomycorrhizal fruitbody abundance for the total community (1994 and 1995) and for individual abundant genera (1995 only), across an atmospheric N deposition gradient near Kenai, Alaska. Correlations are based on site means. See text for details.


 

Environmental variable

Taxonomic group

Nitrophobic taxa

Nitrophilic taxa

Total* 
1994

Total
1995

Cortinarius

Russula 

Tricholoma

Hebeloma

Other
Lactarius 

Other genera

Lactarius theiogalus

Laccaria

Paxillus 
Bulk N deposition

-0.72

-0.08

-0.93

-0.82

-0.76

-0.57

-0.70

-0.83

0.25

0.19

0.17

Organic horizon N availability
KCl extractable   NO3-N

-0.85

0.03

-0.93

-0.79

-0.80

-0.71

-0.76

-0.77

0.34

0.33

0.31

KCl extractable NH4-N

-0.68

0.08

-0.91

-0.90

-0.87

-0.81

-0.65

-0.86

0.46

0.33

0.40

KCl extractable NH4-N + NO3-N

-0.73

0.07

-0.93

-0.88

-0.87

-0.79

-0.70

-0.85

0.43

0.34

0.38

Net nitrification

-0.77

0.07

-0.93

-0.79

-0.80

-0.71

-0.76

-0.77

0.38

0.41

0.42

Net mineralization

0.25

0.48

-0.58

-0.43

-0.66

-0.62

-0.33

-0.49

0.62

0.68

0.67

Anion exch. NO3-N

-0.72

0.10

-0.84

-0.80

-0.84

-0.74

-0.63

-0.89

0.42

0.31

0.24

Cation exch. NH4-N

-0.64

0.16

-0.83

-0.80

-0.72

-0.66

-0.74

-0.72

0.50

0.21

0.42

Mineral horizon N availability
Net mineralization

0.04

-0.22

0.79

0.80

0.72

0.67

0.57

0.72

-0.50

-0.42

-0.28

Organic horizon pH and cations
pH (CaCl2)

0.69

-0.09

0.86

0.77

0.92

0.81

0.52

0.87

-0.46

-0.38

-0.46

Base saturation

0.61

-0.01

0.77

0.74

0.88

0.74

0.44

0.76

-0.25

-0.39

-0.34

Mineral horizon pH and cations
pH (CaCl2)

0.76

-0.08

0.85

0.79

0.84

0.79

0.60

0.84

-0.47

-0.31

-0.38

Exch. Ca

0.63

0.04

0.81

0.68

0.68

0.64

0.64

0.75

-0.38

-0.42

-0.53

Exch. base cations*

0.67

0.05

0.87

0.75

0.81

0.74

0.70

0.80

-0.36

-0.41

-0.49

Exch. Mg*

0.71

-0.02

0.92

0.81

0.96

0.81

0.72

0.84

-0.37

-0.37

-0.41

Spruce foliar nutrients
N

-0.80

-0.13

-0.75

-0.75

-0.76

-0.76

-0.62

-0.62

0.18

0.01

0.07

K

0.67

0.03

0.83

0.79

0.74

0.64

0.64

0.82

-0.39

-0.05

-0.21

P

0.57

-0.28

0.73

0.72

0.73

0.64

0.44

0.72

-0.51

-0.30

-0.32

Mg

0.69

0.10

0.72

0.66

0.65

0.51

0.55

0.74

-0.21

0.01

0.07

Mn

-0.54

0.45

-0.70

-0.48

-0.70

-0.76

-0.44

-0.55

0.72

0.58

0.67

Tree growth and biomass
radial growth 1993-1995

-0.52

0.28

-0.56

-0.31

-0.56

-0.39

-0.21

-0.58

0.31

0.53

0.24

basal area

0.72

0.10

0.70

0.60

0.61

0.62

0.69

0.54

-0.12

0.07

0.01

Plant community
Grass relative abundance

-0.77

0.01

-0.88

-0.72

-0.74

-0.60

-0.78

-0.68

0.24

0.29

0.22

Feather moss cover

0.67

-0.27

0.85

0.73

0.90

0.75

0.55

0.85

-0.55

-0.57

-0.53

* Correlations for all fruitbody abundance and soil cations were based on log-transformed values.

NA = not applicable.  


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