The Crafoord Prize for 1984 was awarded in biosciences with particular emphasis
on ecology. The field selected was "coevolution - the mutual adaption
of organism populations in the natural environment". The prizewinner, ...
The tropics are subject to seasonal
extremes. There are times of year when
the weather is harsh, when food is scarce,
when there is too much sun, or too much
rain. Many tropical animals tough out the hard times
by ...
Janzen, Daniel H.; Lynn, David G.; Fellows, Linda E.; H. Winnie(1982)
L-Hypaphorine has been isolated as a major constituent of the seeds of Pterocarpus officinalis,
seeds which are rejected as a food source by a wide variety of seed-eating rodents dwelling in the same
habitat. Incorporation ...
The hooded skunk (Mephitis macroura) is described for the first time
from Costa Rica. There is a population of these animals in Santa Rosa
National Park and its vicinity, south to Liberia. Brief notes are made on
the ...
Whether there is a future for tropical ecology, and of what it will consist, does
not lie in the unveiling of yet another intricate animal-plant interaction, in the
application of technological marvels, or in the discovery ...
The planners of this conference have asked me for a discussion of the interactions
between legumes and herbivores. This is a request for an examination of
traits of legumes as pertains to herbivores. On the one hand, I ...
A new non-protein amino acid, tetrahydrolathyrine (2(S)-3(2-amino-l,4,5,6-tetrahydropyrimidin-4-
yl)alanine), has been isolated from seeds of Lonchocarpus costaricensis.
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 ...
(1) The deciduous forests and the riparian evergreen vegetation that they include
in the lowlands of Guanacaste Province, Costa Rica, contain at least 975 species of
dicotyledonous plants. At least 110 species of beetles ...
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, ...
By cutting 1/3,2/3 and all of the fruit pulp off of ripe Andira inermis
fruits, the intensity of seed predation by Cleogonus weevils was lowered
from 97.5 percent in the controls to 92.5, 92.5 and 83.5 percent, ...
Janzen, Daniel H.; DeVries, P.; Gladstone, D. E.; Higgins, M. L.; Lewinsohn, T. M.(1980)
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 ...
In Santa Rosa National Park in the deciduous forests of northwestern
Costa Rica, tapir (Tapirus bairdjj) dung contains seeds and seed fragments.
Large seeds such as those of Mastichodendron capriri, Mani/kara
zapota and ...
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 ...
Sced dispe",al and pollen movement by animals have very much in common, though we know so
lillie of either that it is hard to be specific. The focus has Ixen on animals at the fruit crop rathcr
than the seed shado,,·s ...
Janzen, Daniel H.; Doerner, S. T.; Conn, E. E.(1980-01-16)
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 ...