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 ...
The five species of adult nocturnal dung beetles (Scarabaeinae, Scarabaeidae) that
degrade most horse dung during the rainy season in Santa Rosa National Park, Costa
Rica, were censused with horse dung-baited traps from ...
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 ...
We demonstrated allometric differences in re lative head mass in different
instars of 12 species of Satumiidae and 14 species of Sphingidae. The differences were
related to the different ways in which individuals from ...
Janzen, Daniel H.; H. Winnie; Gámez, Rodrigo; Sittenfeld, Ana; Jimenez, Jorge(1993)
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 ...
Janzen, Daniel H.; Clarence, A. Ryan; Liener, Irvin E.; Pearce, G.(1985-10-15)
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 ...
Plants stand still. This is as true in Amazonian rainforest as it is in boreal coniferous forest. As the
architects of every medieval castle understood, if you are fixed in place, your past experiences (natural
selection) ...
Gauld, Ian D.; Gaston, Kevin J.; Janzen, Daniel H.(1992-11)
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 ...
The function of an immature fruit is to add to the photosynthate pool and
to protect the developing seed (see Chap. 17, this Vol.). Once ripe, the fruit
puts the seed in the appropriate dispersal agent(s) and keeps it ...