Many endangered species are distributed in narrow geographic ranges, often at severe risk of extinction. Ecological niche modeling can be used to identify suitable areas, which surveyed detect additional populations. We combined remotely sensed data (Normalized Difference Vegetation Index) and field sampling increase distributional knowledge the improve understanding its conservation status. id...

BACKGROUND Invasions of natural communities by non-indigenous species are currently rated as one of the most important global-scale threats to biodiversity. Biodiversity itself is known to reduce invasions and increase stability. Disturbances by ecosystem engineers affect the distribution, establishment, and abundance of species but this has been ignored in studies on diversity-invasibility rel...

Let Y be generated from ∼N(μ υ2), where μ= √ e2·lr−1+υ − υ2, where lr ∈ {x ∈ R : e2·lr−1+υ − υ2 ≥ 0}. Under DGPs of this form, E[Λi(φ∗)] = lr . Thus, varying lr controls how far the deviation is from H0. On the other hand, when lr = 0, varying the parameter υ2 controls how large ω2 is. Setting υ2 = 1 makes ω2 = 0, and setting υ2 far from 1 makes ω2 large. First, I fix lr = 0 and study the null ...

Mixed grazing systems combining sheep and cattle have shown better growth performance for one or both species. This observation has been attributed to their complementary feeding behaviour and the reduced host infection by gastrointestinal nematodes. Less attention has been paid to mixed grazing systems combining goats and cattle. Here, continuously grazing goats mixed with cattle (M) were comp...

Brazilian agribusiness is heavily influenced by beef export. Thus, it important to evaluate the quality and growth rate of forage species used as cattle food. Given that structural organization leaf cells tissues directly related forage-plant growth, we aimed analyze foliar anatomy Urochloa brizantha U. ruziziensis subjected different fertilization management practices. Experimental design was ...

Satellite remote sensing is a popular approach for identifying vegetation change in northern environments; however, disentangling ecological processes causing variability spectral indices remains challenge. Here, we aim to determine how shrub characteristics differ between low and rapidly greening areas near Nain, Nunatsiavut, Canada. Using cross-scale approach, combined remotely sensed trends ...

Occasional strong droughts are an important feature of the climatic environment of tropical rain forest in much of Borneo. This paper compares the response of a lowland dipterocarp forest at Danum, Sabah, in a period of low (LDI) andaperiodofhigh (HDI) drought intensity (1986–96,9.98y;1996–99,2.62y).Meanannual drought intensity was two-fold higher in the HDI than LDI period (1997 v. 976mm), and...

Application of mycorrhiza-biofertilizer and intercropping with legume crops could improve performance yield red-rice grown onraised-beds under aerobic irrigation systems, but weeds became a serious problem, which needs more frequent weeding. A Split Split-Plot (SSP) experiment was designed to examine synergistic effects rice-straw mulch application on yieldof several black rice promising-lines ...