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I ; Fernandes, G I.

Unexpected effects of pigeon-peas (Cajanus cajan) in the restoration of rupestrian fields

Indeed, Tilman found a negative correlation between species richness and soil fertilization while Negreiros et al. During the postwar period, these countries experienced dramatic demographic change, although details. Seed dormancy and germination in Rhexia mariana var. How to cite this article. The highest diversity of galling insects: The environmental agencies involved allowed the use of a mix of species containing many exotic species that were spread into the region by hydro-seeding, when previous studies had advised the use of only native species Ribeiro et al.

Mycorrhizal inoculation effect on nodulation and N accumulation in Cajanus cajan at soil P concentrations sufficient or inadequate for mycorrhiza-free growth.

nbr 14063 1998

Plenum Press, New York. The goal of this ant was to evaluate the effect of light and temperature on seed germination of M. All plant individuals except grasses within the plots were counted and identified.

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Ecological road threatens endemic Brazilian plant with extinction. Patterns of seed longevity and germination in the tropical rain forest. This highway was restored in and the pigeon pea, Cajanus cajan Fabaceaewas used to facilitate the succession process.

The present study compares plant species jbr, diversity, abundance, equitability, similarity, and soil composition between restored and non-restored areas, in an attempt to abnr the effectiveness of the use of C. To evaluate the influence of Phosphorus and Magnesium on the plant abundance and species richness we used a Pearson correlation Zar, In most cases, exotic species are used with consequences to ecosystem processes and functioning not fully evaluated.

Canadian Journal of Botany Seed dormancy and germination of sympatric species of Chamaecrista Leguminosae in a rupestrian field. Seedling growth and biomass allocation ngr endemic and threatened shrubs of rupestrian fields. Patterns of abundance of a narrow endemic species in a tropical and infertile montane habitat. Likewise, diversity was 1.

In fact, we found high pH levels in both treatments. Out of the eight chosen areas, four zbnt previously restored through the planting of C. Restoration by planting the legume Cajanus cajan was implemented in some of these areas. The species has its origins in India Provazi et al.

Rupestrian field soils are generally acidic, poor in nutrients, and contain high Aluminum saturation values due to geological and geomorphological conditions Benites et al. Cajanus cajan density within the restored areas was 4.

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The introduction of exotic species is one of the zbnt causes of the current mass extinction of species Mittermeier et al.

In conclusion, the use of C. As some data did not present normal abht and variance homogeneity, we used the Mann-Whitney test to compare diversity, species richness, equitability, plant abundance, and soil traits. Tibouchina pulchra Cogn e Tibouchina granulosa Cogn.

Seed size, seed germination and seedling survival of Brazilian tropical tree species differing in successional status. On the other hand, none of the other soil components analyzed differed statistically between the two treatments Table 2. The level of Phosphorus found 13300 the restored areas was higher then the level reported by Marques and Negreiros et al.

International Journal of Ecology and Environmental Sciences Each treatment restored and non-restored had four sampling areas, each with three m 2 plots.

The areas where C. These results contradict the idea that increasing soil fertility is a key element in restoration programs Negreiros et al. Despite the higher concentration of phosphorus, the presence of C.