A large aspect of tourism that effects cave environments is the need to build structures, and provide lighting in order to accommodate tourists and visitors. The building of infrastructure and installation of lights and ventilation necessary to accommodate tourists has been linked to severe changes in the delicate microclimates within caves. These changes in microclimate can be devastating, and in fact have been shown to adversely affect the organisms living in the caves. The Glow Worm cave in New Zealand was closed for 4 months, after approximately only four percent of the glow worm population in the cave had their lights on. It was found to be caused by increased air flow causing a reduction in humidity and increased evaporation. This is an example of the fickle nature of a caves microclimate, and how important it is to the species who rely on it.