International Journal of Forestry Research / 2013 / Article / Tab 1

Research Article

Leaf Gas Exchange and Nutrient Use Efficiency Help Explain the Distribution of Two Neotropical Mangroves under Contrasting Flooding and Salinity

Table 1

Mixed model ANOVA results describing leaf gas exchange variables for seedlings of Rhizophora mangle and Laguncularia racemosa grown in mixed culture under different salinity and hydroperiod treatments.

Source of variationDF, DFerrorA PWUEDF, DFerrorPNUE

Species1, 5ns*********1, 20.1*
Salinity1, 5********1, 20.8***
Hydroperiod1, 5nsnsnsns1, 20.8ns
Species × salinity1, 5ns**ns**1, 20.1ns
Species × hydroperiod1, 5nsnsnsns1, 20.1ns
Salinity × hydroperiod1, 5ns***ns1, 20.8ns
Species × salinity × hydroperiod1, 5*ns**ns1, 20.1ns

Month1, 5************
Salinity × month1, 5nsns****
Species × month1, 5nsns*ns
Hydroperiod × month 1, 5nsns*ns
Salinity × species × month 1, 5*nsnsns

NS: not significant at the 0.05 level; *significant at 0.01–0.05 level; **significant at 0.01–0.001 level; ***significant at <0.001 level.
A: assimilation; : leaf intercellular CO2 concentration; : stomatal conductance; PWUE: instantaneous photosynthetic water use efficiency; PNUE: photosynthetic nitrogen use efficiency.

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