Linking habitat stability to floods and droughts: effects on shrimp in montane streams, Puerto Rico

Covich A.P., Crowl T.A. & Scatena F.N. (2000) Linking
habitat stability to floods and droughts: effects on
shrimp in montane streams, Puerto Rico. Verhandlungen
der Internationalen Vereinigung fu¨r Theoretische und
Angewandte Limnologie, 27, 2430–2434.

Abstract: 
Most previous studies on Caribbean flood and drought frequency have examined hydrological (e.g. MORRIS & VAZQUEZ 1990, GARCIA et al. 1996) rather than ecological effects (COVICH et al. 1998). We analyzed temporal and spatial distributions of rainfall, stream flow, and mean maximum pool depth over an 8-year period (1990–1997) to evaluate effects of variable flows. We examined the response of a biotic variable (the coefficient of variation in shrimp densities) to changes in water depth (coefficient of variation of maximum pool depth) along an elevational gradient.