The function predicts body temperature (K, operative environmental temperature) of a lizard based on Fei et al. (2012) .

Tb_lizard_Fei(T_a, T_g, H, lw, shade, m, Acondfact, Agradfact)

Arguments

T_a

numeric air temperature at lizard height (K).

T_g

numeric surface temperature (K).

H

numeric total (direct + diffuse) solar radiation flux (W m-2).

lw

numeric downward flux of near-infrared radiation (W m-2).

shade

numeric proportion of shade.

m

numeric lizard mass (g).

Acondfact

numeric proportion of the lizard projected area that is in contact with the ground. Acondfact = 0.1 for standing and Acondfact = 0.4 for lying on ground.

Agradfact

numeric proportion of the lizard projected area exposed to radiation from the ground. Agradfact = 0.3 for standing and Agradfact = 0.0 for lying on ground.

Value

numeric predicted body (operative environmental) temperature (K).

Details

Thermal radiative flux is calculated following Fei et al. (2012) based on Bartlett and Gates (1967) and Porter et al. (1973) .

References

Bartlett PN, Gates DM (1967). “The energy budget of a lizard on a tree trunk.” Ecology, 48, 316-322.

Fei T, Skidmore AK, Venus V, Wang T, Schlerf M, Toxopeus B, van Overjijk S, Bian M, Liu Y (2012). “A body temperature model for lizards as estimated from the thermal environment.” Journal of Thermal Biology, 37(1), 56-64. ISSN 0306-4565, doi:10.1016/j.jtherbio.2011.10.013 , https://www.sciencedirect.com/science/article/pii/S0306456511001513.

Porter WP, Mitchell JW, Bekman A, DeWitt CB (1973). “Behavioral implications of mechanistic ecology: thermal and behavioral modeling of desert ectotherms and their microenvironments.” Oecologia, 13, 1-54.

Author

Ofir Levy

Examples

  Tb_lizard_Fei(T_a       = 293,
                T_g       = 300,
                H         = 1300, 
                lw        = 60, 
                shade     = 0.5, 
                m         = 10.5, 
                Acondfact = 0.1, 
                Agradfact = 0.3)
#> [1] 307.5087