The objective of this work was to compare two different methods concerning their efficiency in a selection of soybean genotypes for Al tolerance. Selection for aluminium tolerance is necessary to the full adaptation of the soybean crop in the acid soils of the Brazilian Savannahs (Cerrados). Field techniques, however, are laborious and time consuming. The present results indicate that hill plot...

Figure 1. Realm of possible impacts of invasive plant species on species– area relationships in plant communities: (a) non-invaded community or community with invader cover less than 40% [1,3], (b) heavily invaded plots with invader cover more than 80% and negative impact on small plot diversity [1; 4, fig. 2], (c) heavily invaded plots with negative impact on both small and large plot diversit...

Aim Inventorying plant species in an area based on randomly placed quadrats can be quite inefficient. The aim of this paper is to test whether plant species richness can be inventoried more efficiently by means of a spectrally-based ordering of sites to be sampled. Location The study area was a complex wetland ecosystem, the Lake Montepulciano Nature Reserve, central Italy. This is one of the m...

Declines in avian populations highlight a need for rigorous, broad-scale monitoring programs to document trends in avian populations that occur in low densities across expansive landscapes. Accounting for the spatial variation and variation in detection probability inherent to monitoring programs is thought to be effort-intensive and timeconsuming. We determined the feasibility of the analytica...

Accurate estimates of the extent and distribution of wetlands and streams are the foundation of wetland monitoring, management, restoration, and regulatory programs. Traditionally, these estimates have relied on comprehensive mapping. However, this approach is prohibitively resource-intensive over large areas, making it both impractical and statistically unreliable. Probabilistic (design-based)...

Airborne videography can be an effective tool for assessing the effects of catastrophic events on forest conditions. However, there is some question about the appropriate sampling intensity to use, especially when trying to develop correlations with probabilistic data sets such as are assembled through the Forest Inventory and Analysis (FIA) surveys. We used airborne videography to assess damag...

Designing woody fuel sampling methods that quickly, accurately and efficiently assess biomass at relevant spatial scales requires extensive knowledge of each sampling method’s strengths, weaknesses and tradeoffs. In this study, we compared various modifications of three common sampling methods (planar intercept, fixed-area microplot and photoload) for estimating fine woody surface fuel componen...

Variable plot sampling has been widely used for many years. It was recognized, early in its application, that the process of getting stand volume could be divided into two components, counting trees to get basal area per unit area and measuring trees to get volume/basal area ratios (VBARs). It was further recognized that these two components had different amounts of variation and therefore shou...

The problem of visualizing huge amounts of data is well known in Information Visualization. Dealing with a large number of items forces almost any kind of Infovis technique to reveal its limits in terms of expressivity and scalability. In this paper we focus on 2D scatter plots, proposing a ”feature preservation” approach, based on the idea of modeling the visualization in a virtual space in or...