Five large branches of a Cassia grandis tree were deflowered in its
flowering year; the consequence was that 10-20 percent of the floweringfruiting
capacity of the tree's crown was offset by one year from the
tree's ...
I hypothesize that, for a number of species of small-seeded herbaceous plants, a
normal and selected for mode of seed dispersal was through consumption of the
seeds by large herbivores while they were eating the foliage ...
The large ungerminated seeds of guanacaste (Enterolobium cyclocarpum) and cacao trees (Cassia grandis) , and plastic
buttons, were fed to a captive adult male Costa Rican Baird's tapir (Tapirus bairdi) in artificial fruits, ...
In June-July 1979, in Santa Rosa National Park, Costa Rica, a Catasetum maculatum orchid produced two
successive five-flowered female inflorescences and attracted at least 407 male Eulaema polychroma o¥er 59
flower days; ...
Two female Costa Rican range cattle were fed 961 and 1407 large hard dormant
seeds of the guanacaste tree Enterolobium cyclocarpum. Of the 823 and 1111 hard
dormant seeds defecated, 66 and 86% had emerged by the end of ...
WHEN a seed germinates, we expect the defensive secondary
compounds it contains to be transferred intact to the growing
seedling, or variously decomposed to produce resources for the
growing seedling. The seeds of wild ...
I intrude in your institutional affairs, but
I come in the cause of tropical. biology, and
as a concerned user of the facilities of the
Department of Entomology of the U.S. National
Museum (USNM) for over 30 years.
I ...
Dr. Daniel Janzen is one oflhe world's authorities on
tropical forests. A professor of ecology at the VnilJersity
of Pennsylvania, Janzen has spent six months of every year
for the past 30 years studying the intricate ...
Complex ity in biological systems cannot be measured by the
number of species present, even though th is parameter is trad i·
tionally used as an intu it ive measure of complexity. What matters
in complexity is how many ...
It's long been the subject of discussion in bars, bedrooms, and backyards, but it's time to
get it out in the open where it begins to have an effect on the explicit decision-making process.
We are producing far too many ...
When Andira inermis (Leguminosae) fruits are sorted into those with 0,
1, 2-5, and greater than 5 feeding and oviposition punctures by Cleogonus
weevils, there is 100, 87, 65, and 2 percent seed survival in these
four ...
The southern portion of the Chihuahuan Desert of subtropical north central
Mexico (110, 186, 250, 254, 255, 262, 311) extends from the vicinity of
Zacatecas and San Luis Potosi north to the area of Saltillo, Torreon, ...
Pithecellobium saman (Leguminosae: cenizero) is one of several species of Costa Rican
deciduous forest large trees that flower at the end of the dry season and then bear dormant
tiny fruits through the following rainy ...
Calcrpillars---taken here to mean the larvae of Lepidoptera-are nOI uniformly
or randomly present in spe<:ics or abundance in tropical lowland habitats. Instead,
it is evident (0 any field natu.ra1ist that tropica1 ...
Tropical conservation biology, like other conservation
biology, contains a large and necessary emotional element.
People lobby to save that which they take pleasure
in. Tropical forests have largely been cleared to
produce ...
Extinction events range from those that remove a single
population from a local habitat to those megacatastrophes
that obliterate tens of thousands of species over
continents or oceans. When considering megacatastrophes,
and ...