27 documents found, page 1 of 3

Monitoring genetic diversity in tropical trees with multilocus dominant markers

Since no universal codominant markers are currently available, dominant genetic markers, such as amplified fragment length polymorphism (AFLP), are valuable tools for assessing genetic diversity in tropical trees. However, the measurement of genetic diversity (H) with dominant markers depends on the frequency of null homozygotes (Q) and the fixation index (F) of populations. While Q can be estimated for AFLP lo...

Unfolding long-term Late Pleistocene–Holocene disturbances of forest communitie...

Linking the distribution of plant species to geology has generally been biased by the over-simplification of landscape evolution and the lack of understanding of complex geological processes. The Amazonian lowlands have forests in different successional stages, and a growing perception is that such heterogeneity results from long-term environmental changes. This hypothesis is investigated by designing an analyt...

Prey preference of the common vampire bat (Desmodus rotundus, Chiroptera) using...

Morphological identification of prey fragments in vampire bat feces is impossible because of an exclusively blood-based diet. Therefore, studies of their foraging ecology require innovative approaches. We investigated the diet of Desmodus rotundus using a PCR-restriction fragment length polymorphism (RFLP) molecular method by amplifying the cytochrome b mitochondrial gene (380 bp) from DNA fecal samples collect...

Polinização de Caryocar villosum (Aubl.) Pers. (Caryocaraceae), uma árvore emer...

Biased-corrected richness estimates for the Amazonian tree flora

Amazonian forests are extraordinarily diverse, but the estimated species richness is very much debated. Here, we apply an ensemble of parametric estimators and a novel technique that includes conspecific spatial aggregation to an extended database of forest plots with up-to-date taxonomy. We show that the species abundance distribution of Amazonia is best approximated by a logseries with aggregated individuals,...

Pollination of Caryocar villosum (Aubl.) Pers. (Caryocaraceae), an emergent tre...

Caryocar villosum is a common emergent tree of Central Amazonia. It is an important timber tree and source of fruit for men and animals. We study the floral biology, pollination, and breeding system of C. villosum. Data was collected from trees in an urban area, forest fragments and a continuous forest. Floral characteristics and plant-pollinator interactions were described and controlled hand-pollinations were...

Brief Note Mendelian inheritance, linkage and genotypic disequilibrium in micro...

Efeitos do Fogo nas Florestas

Flores pedem morcegos

Contrasting patterns of genetic structure in Caryocar (Caryocaraceae) congeners...

In the present study, we compare the genetic structure of a flooded forest tree Caryocar microcarpum and a terra firme forest tree Caryocar villosum in the lower Rio Negro region and test the hypothesis that the Rio Negro, the largest tributary on the left bank of the Amazon River, has been acting as a geographical barrier to gene flow between populations from the left and right banks. Seventeen adult individua...