Meat, flour and sugar baits were used on the soil surface and buried to examine species composition of the ant fauna in three separate tropical forests in Brazil, and to control for the effect of the regional faunal pool. Compositional mosaic diversities were comparable among areas, bait types and foraging strata. Mosaic diversity was independent of mean as-semblage size. The number of unique species per sampling unit was correlated with mean as-semblage size. Canonical correspondence analysis ordered species first by foraging substrate, second by geographic location, and third by diet. The first axis was significantly correlated with mean similarity and affinity. Mean Mahanalobis distances between centroids of groups based upon foraging strata were significantly larger than between localities, indicating local ecological pressures stronger than regional species pool constraints. As most species foraged in only one stratum in one geographical position and were not omnivorous, the response of species to environmental gradients (continuums) showed a lower coherency with these patterns than did communities, structured around guilds based upon foraging strata and diet.
Community fisheries and co-management on the Lower Amazon floodplain of Brazil
Community fisheries and co-management on the Lower Amazon floodplain of Brazil
In response to the growth of Amazon commercial fisheries, a loose regional network of communitymanaged lakes has proliferated throughout the Amazon floodplain system. This approach has been widely perceived as a promising alternative for the sustainable management...