The Sherman plot is located in the San Lorenzo National Park in tropical moist forest on the Caribbean side of the Panama Canal. It sits on a hilltop south of the Chagres River and receives approximately 2700-3000 mm of annual rainfall.
The plot is 5.96 ha. It is a 400 m x 100 m rectangle with a 140 m x 140 m square contiguous to the left side of the southernmost hectare. A canopy research crane belonging to the Smithsonian Tropical Research Institute is situated in the center of this 140 m x 140 m square. The northernmost hectare of this plot is in young forest approximately 30 years old.
The Sherman plot has been censused 4 times: 1996, late 1997 to early 1998, 1999, and 2009. All free-standing woody plants with stem diameter 1 cm or above at breast height were tagged, measured, mapped, and identified to species.
Condit, R., S. Aguilar, A. Hernández, R. Pérez, S. Lao, G. Angehr, S.P. Hubbell, and R.B. Foster. 2004. Tropical forest dynamics across a rainfall gradient and the impact of an El Niño dry season. Journal of Tropical Ecology, 20: 51-72.
Condit, R. 1998. Ecological implications of changes in drought patterns: shifts in forest composition in Panama. Climatic Change, 39: 413-427.
Pyke, C.R., R. Condit, S. Aguilar, and S. Loo de Lao. 2001. Floristic composition across a climatic gradient in a neotropical lowland forest. Journal of Vegetation Science, 12: 553-566.