Aquatic plants are an important component of well functioning lake ecosystems. Plant abundance is influenced by sediments, nutrients and water clarity. Given the dominance of agriculture in Iowa, nutrients and soil lost from “leaky” watersheds combine to create ideal habitat for growth of aquatic plants in lakes and ponds and hasten eutrophication. Under these conditions, plant growth can becom...

The relationships between environmental exposure to risk agents and health conditions have been studied with the aid of remote sensing imagery, a tool particularly useful in the study of vegetation cover. This study aims to evaluate the influence of environmental variables on the spatial distribution of the abundance of Lutzomyia longipalpis and the reported canine and human visceral leishmania...

We analyzed potential land degradation processes in semiarid regions worldwide using long time series of remote sensing images and the Normalized Difference Vegetation Index (NDVI) for the period 1981 to 2011. The objectives of the study were to identify semiarid regions showing a marked decrease in potential vegetation activity, indicative of the occurrence of land degradation processes, and t...

the present meta-analysis was conducted to provide a quantitative measure of the overall effects of task complexity on chinese efl learners’ language production. based on the strict inclusion criteria, 12 primary studies were synthesized according to key features. eleven of them were meta-analyzed to investigate effects of raising the resource-directing task complexity. results revealed that ...

We assessed the structural complexity of vegetation, birds and soundscapes in two areas Braulio Carrillo National Park, Costa Rica, with different road exposure, as baseline information for conservation management. measured vegetation structure complexity, surveyed recorded an area adjacent to Highway 32 (Quebrada) another 20 km away (Ceibo). Quebrada presented a more open forest lower density ...

This paper discusses a model for the virtual reconstruction of the historic garden of Villa lo Zerbino in Genoa. We describe the process that starts from a specific knowledge (based on documents, drawings and maps) and leads to a 3d model focusing on the vegetation elements. This representation allows addressing issues peculiar to the reconstruction of historic gardens, such as the analysis of ...

Floods trigger cascades of physical processes that alter streams and riparian zones of mountain landscapes, yet affected species are resilient Recent flooding in the Pacific Northwest vividly illustrates the complexity of watershed and ecosystem responses to floods, especially in steep forest landscapes. Flooding involves a sequence of interactions that begins with climatic drivers. These drive...