Table 5.  Studies reporting the results of experimental studies on the use of habitats by communities of lizards.  Some studies conclude that competition is important (either currently or in the past), while other studies conclude that something other than competition is driving the observed habitat use in the community.
Studies concluding competition important
Losos et al. (1993a)

In a natural experiment, Anolis conspersus has shifted perch height in habitats where A. sagrei has colonized

Pacala and Roughgarden (1982, 1985)

Removal experiments showed that the presence of Anolis wattsi increased the perch height of A. gingivus.

Petren and Case (1998)

Competition between the geckos Hemidactylus frenatus and Lepidodactylus lugubris was reduced when the complexity of their habitat was increased.  The change occurred because of changes in how each species foraged and behaved.  The changes were substantial enough to allow coexistence of these two species.

Vanhooydonck et al. (2000)

In laboratory experiments, Podarcis sicula appears to be aggressively dominated by P. tiliguerta, causing it to be more secretive, suggesting P. sicula may be competitively inferior to P. tiliguerta.  However, in the field these two species use different microhabitats (Van Damme et al., 1990), possibly facilitating coexistence

Studies concluding something else important
Leal et al. (1998) Removal of Anolis gundlachi (typically occurs within 2 m of the ground) from plots in a Puerto Rican rainforest caused no change in habitat use by sympatric A. evermanni (typically occurs at 2 m or higher), but A. evermanni did increase in numbers, indicating that competition or intraguild predation is probably occurring between these species despite apparent habitat segregation.
Rummel and Roughgarden (1985)

Experimental results led them to conclude that competition was not important in determining perch use in Anolis bimaculatus and A. wattsi.

Tinkle (1982)

Removal of two sympatric species (Sceloporus clarki and Urosaurus ornatus), had no effect on habitat use or perch height of a third species (Sceloporus undulatus), and leading Tinkle to conclude that competition was not important.