Butterfly community structure in belize: species richness patterns reveal the role of climate gradients in shaping butterfly community structure and strategies for long-term conservation.

To produce insights into the nature of butterfly communities in Belize and potential strategies for their conservation, we analyzed a data set of 31,539 occurrences representing 1047 species of butterflies. Most species in Belize are rarely encountered and 23% are known from one or two occurrences. Conversely, a few species (2%) are disproportionately abundant (19% of occurrences). Chao 1 and 1st-order Jackknife species richness estimates indicate a minimum of 101.6 ± 17.5 and 169.7 ± 24.9 additional species (respectively) in Belize. Most of the "missing species" are Lycaenidae, Riodinidae and Hesperiidae, groups that are difficult to identify and which have ecological traits that decrease detectability in the field. Seasonal and geographic weather patterns related to precipitation structure butterfly communities in the country. Species richness (alpha-diversity) is correlated to both average monthly temperature and precipitation for most, but not all families. During the dry season, both species numbers and densities are low, but both increase abruptly with the onset of rains. There are significant beta-diversity community differences between seasons (rainy and dry) as well. Precipitation decreases dramatically from south to north across the country and Chao 1 and rarefication estimates indicate that species richness is highest in southern Belize and declines northward corresponding with regional patterns of precipitation. Likewise, the three southern districts of Belize support significantly different butterfly communities (beta-diversity) than do the three northern districts. Implications for insect conservation: Because climate change will disrupt the status quo as ecological communities respond to changes that influence drought stress, actions that ensure that ecological connectivity is maintained or restored across ecological gradients, especially as reflected by precipitation patterns, will be critical for conserving butterfly and other phytophagous insect communities in Belize as communities respond to climate disruption. We make geographically explicit recommendations for conservation action. [ABSTRACT FROM AUTHOR]