Ambrosia artemisiifolia is an invasive weed in Europe with highly allergenic pollen. Populations are currently well established and cause significant health problems in the French Rhône valley, Austria, Hungary and Croatia but transient or casual introduced populations are also found in more Northern and Eastern European countries. A process-based model of weed growth, competition and populatio...

Palynological analysis of pollen, Pteridophyta spores and algae deposited in the superficial sediments at Lagoa de Cima and Lagoa do Campelo Lakes, located in the north of Rio de Janeiro state, was used to determine the spatial variation of the palynomorphs deposition. A total of 67 pollen types were identified at Lagoa de Cima, with an expressive contribution of regional arboreous taxa, hydrop...

Bumble bees ( Bombus terrestris ) are important pollinators of wild and crop plants. Despite their importance in the process fruit seed production on sites, activity may be impaired due to exposure pesticides. This species has a yearly life cycle colony success rely effective foraging workers ruderal plants late summer when most crops no longer flowering. In current study, we investigated effec...

The western region of Saudi Arabia is a major vegetation diversity hotspot with wide range habitats and variant climatic topographical characteristics. in this has not been fully studied to monitor the changes that happen over time these habitats. This study aims identify floristic structure plant species invaded Arabia. A total 58 stands different (i.e., mountains, protected areas “ridge mount...

Abstract: Aim Evaluate the structure of aquatic macrophytes assembly Jacarecica II Dam, Areia Branca, Sergipe, and verify if distance from margin is a driver for species richness, composition in this environment. Methods We settled transects where we plotted quadrats subplots. The were perpendicular relation to reservoir margin, first quadrat was placed on with four following ones completely ov...

The Remolar beach-dune system (700 m long and more than 100 wide, 070N direction) borders a campground that was closed (2003), due to the Barcelona airport expansion. In order recover restore dune ecosystem, series of soft measures were performed. After 10 years, study morphology, sedimentology, vegetation ecosystem carried out evaluate results these measures. For this purpose, topographic grou...

This study is based on a ruderal species: Malva subovata = Lavatera maritima which should normally grow in the littoral, under maritime influence. Its presence matorrals highlighted for first time. as it has been found far from its natural habitat. The comparison of different biological and morphological spectra shows importance therophytes that confirms phenomenon degradation. degradation depl...

The riparian forest is one of the most diverse environments La Plata River plains. It represented by patches humid forests, which are a valuable source ecosystem services and have recreational educational potential. However, has undergone constant modification, worsened private real-estate developments lack government regulation. Among reserves that protect forest, Municipal Ecological Reserve ...