The movement of frugivores between remnant forests and successional areas is vital for tropical forest tree species to colonize successional habitats. The response of these species to the spatial structure of pasture tree cover is largely unknown. We studied avian frugivores that were found in primary forest edges and large pastures in eastern Amazonia, Brazil. We determined how the small-scale...

Historically, pasture breeders have not considered environmental weed risk in species selection and assessment. Consequently several pasture or former pasture species are now problematic environmental weeds in Australia. The CRC for Plant-Based Management of Dryland Salinity (CRC) has taken a pro-active approach to prevent further introduction or promotion of weedy pasture species by developing...

The lower montane zone of northwestern Ecuador, like many parts of the tropics, is undergoing rapid conversion from native forest vegetation to crop and pastureland. The current landscape is a mosaic of agricultural land, forest fragments and secondgrowth vegetation in various stages of development. While there is abundant research documenting the e€ects of land-use change in the lowland tropic...

Recent research on grassland problems has made prominent the importance of strain in pasture species, The strains of grasses and clovers sown determine to a very large extent for what purpose the pasture is most suited, what its carrying capacity will be, and also the extent of its useful life, i',iost of the pasture species when studied show some strain difference, and so it is the object of t...

Increasing plant species diversity has been proposed as a means for enhancing annual pasture productivity and decreasing seasonal variability of pasture production facing more frequent drought scenarios due to climate change. Few studies have examined how botanical complexity of sown swards affects cow performance. A 2-year experiment was conducted to determine how sward botanical complexity, f...

Forest fragmentation affects animal population dynamics mainly by loss of habitat and disruption of animal movement. Lizard assemblages are affected by environmental changes, but, depending on their ecological needs, some species might be more vulnerable than others. The southern Amazon suffers accelerated anthropic actions replacing natural environments by farmland (crops and pasture). This re...

Planting seedlings is a common technique for abandoned pastures restoration in the tropics, supposedly by increasing the seedling recruitment and accelerating succession. In this study we evaluated the role of a young restored forest (one year old) in enhancing seedling establishment from two sources (seed rain and seed bank), in the Atlantic Rainforest region in Southern Brazil. We compared ab...

Saldaran protected region with about 14,000 hectares is located at longitude 50º34ʹE and latitude 32º4ʹN at 115 km of southwest of Shahr-e Kord City. This area is one of the important genetic resources in the Zagros Mountains. In the present study, floristic elements, life forms, chorological analysis, protected status, pasture and poisonous plants were investigated. All specimens were collecte...

Environment and seedling community under isolated trees in pastures are different from those in the open pasture. The effect of the pasture trees on the soil nutrients and on the seedling growth were investigated. Seven isolated trees and eight plots were selected in two pastures of 12-yr and 32-yr old derived from a lowland rain forest with nutrient-rich soil at Los Tuxtlas, Mexico. The soil c...

1 2 A soil transfer field experiment has been designed in order to study (i) whether and how 3 Collembolan communities are affected by a sudden perturbation (a shift from agricultural land 4 to heathland, and the reverse), and (ii) whether species do respond in the same direction and 5 to the same extent according to their habitat preference (ascertained by controls). The study 6 was conducted ...