Table 5.

Relationships between environmental variables and microbiome structure of Durvillaea. Based on partial redundancy analyses of Hellinger-transformed microbiome data, the final model represents the results of stepwise model selection using the ordistep function in vegan.

Species	Subcommunity	Final model (F; P)	R 2
Durvillaea antarctica	Core	Tidal range (9.2; <0.001) + Velocity (3.5; <0.001) + β-SST (3.5; 0.001)	0.43
	Abundant	Tidal range (5.1; <0.001) + β-SST (2.3; 0.002) + Velocity (2.5; <0.001) + Salinity (1.7; <0.001)	0.26
	Rare	Tidal range (1.9; <0.001) + β-SST (1.4; 0.026) + Velocity (1.4; 0.006)	0.08
	Host genetics	Tidal range (92.8; <0.001) + Velocity (8.5; 0.025) + Temperature (7; <0.001) + β-SST (2.3; 0.1)	0.83
Durvillaea poha	Core	Tidal range (8.5; <0.001) + Salinity (5.1; 0.002) + Temperature (4.4; 0.003) + β-SST (5.4; 0.001)	0.3
	Abundant	Temperature (4.1; <0.001) + Tidal range (3.5; <0.001) + Velocity (3.3; <0.001) + β-SST (2.5; 0.004)	0.18
	Rare	Temperature (2.8; <0.001) + Tidal Range (1.9; <0.001) + Velocity (2.1; <0.001) + β-SST (1.6; 0.003)	0.09
	Host Genetics	Tidal Range (6.7; <0.001) + Temperature (5.2; <0.001) + Velocity (4.5; <0.001) + Salinity (3.2; <0.001)	0.26