Showing papers by "Universidade Federal de Mato Grosso published in 1978"
TL;DR: In this paper, the authors studied the dispersal mechanisms of 37 species of plants which occur on Amazonian white sand campinas and found that 75.67 percent of the species have the potential for long distance diaspore dispersal, including 59.46 percent which are bird-dispersed.
Abstract: The dispersal mechanisms of 37 species of plants which occur on Amazonian white sand campinas were studied. 75.67 percent of the species have the potential for long distance diaspore dispersal, including 59.46 percent which are bird-dispersed. This dispersal disharmony towards long-distance dispersal and especially towards ornithochory is characteristic of islands in general. The campinas of the lower Rio Negro region of Amazonia may be treated biogeographically as islands surrounded by large areas of tropical rain forest. A total of eight dispersal types was observed and details of these mechanisms are presented. The type of germination of many of the species studied is reported for the first time.
53 citations
TL;DR: In this article, a trabalho elucidar algumas hipoteses levantadas a respeito da associacao "plantas-formigas" (Mirmecofitas) em algumaas especies de Boraginaceae (Cordia nodosa Lam.), Chrysobalanaceae (Hirtella duckei Hub.), Melastomataceae (Tococa coronata Benth), and Rubiaceae (Duroia saccifera Hook.) that ocorrem na Reserva
Abstract: Resumo Procura-se neste trabalho elucidar algumas hipoteses levantadas a respeito da associacao "plantas-formigas" (Mirmecofitas) em algumas especies de Boraginaceae (Cordia nodosa Lam.), Chrysobalanaceae (Hirtella duckei Hub.), Melastomataceae (Tococa coronata Benth. e Maieta guianensis Aublet) e Rubiaceae (Duroia saccifera Hook.) que ocorrem na Reserva Biologica de Campina (INPA/SUFRAMA — Km 60/2 — Estrada Manaus--Caracarai. Para este estudo, foi coletado o material vegetal e separadamente os mirmecodomaceos, para fazer-se a contagem e identificacao das formigas. Alem destes aspectos, coletou-se dados referentes ao habitat e habito das plantas, a posicao e tamanho dos mirmecodomaceos, a temperatura externa (ambiente) e interna (mirmecodomaceos) e a variacao do numero de formigas abrigadas. As formigas encontras foram: Allomerus sp., Azteca sp. (I e II), Pseudomyrmex sp. (rainha) e Solenopsis sp.
6 citations