In the semi-deciduous forests of Santa Rosa National Park in the Pacific coastal lowlands of northwestern Costa Rica, the large and fast-growing tree Spondias mombin (Anacardiaceae) experiences greater than 95% post-dispersal ...

During the first 2 months of the rainy season, small terrestrial rodents (Liomys salvini, Sigmodon hispidus, Oryzomys fulvescens) were lietrapped in the 11 largest habitats in Santa Rosa National Park, Guanacaste Province, ...

The epiphytic deciduous forest orchid Encyclia cordigera was manually self-pollinated, out-crossed against one other parent, and out-crossed against a maximum number of other parents in Santa Rosa National Park, Costa ...

After perhaps 100 years of gestation, wild plant population biology has been delivered unto us and the baby is growing fast. In this area of evolutionary ecology, seeds are often-discussed life forms. Here I suggest ...

The HCN content of dried Acaciafarnesiana foliage varies from 0.0 to 5.495 tlmol/g among individuals within a population (XC = 1.80, s.d. = 1.80 in wet season; X = 1.21, s.d. = 1.27 in dry season; n = 26) and increased ...

It is ironic that about the time (1960-1980) that tropical field biology is becoming a widespread, respectable and interesting area of research, greatly increased rates of destruction of the tropics are rendering it ...

Countries reap benefits from their wildland biodiversity, but they also pay both direct management and opportunity costs to maintain it. Field research can yield major benefits, and a national system of permits for field ...

A survey of 59 species of tropical legume seeds revealed high interspecific variation in pTOlcinaccous capacity to inhibit bovine trypsin (a digesli"e enzyme) and 10 agglutinate human (type B. Rh positive) and laoorawry rabbit ...

The number of species in many groups of parasitoid Hymenoptera does not increase rapidly with decreasing latitude. Discussion of the processes generating this pattern has focussed upon changes in host demographic traits ...

In the lowland deciduous and riparian evergreen forests of Guanacaste Province, Costa Rica, the insect seed predators are highly host-specific and display a variety of traits suggesting that the ways they use hosts are ...