A lot of salt-affected soils in the world are also affected by compaction and waterlogging due to shallow water tables or decreased infiltration sodicity. Waterlogging cause reduced oxygen exchange (hypoxia). Research on combined impacts salinity hypoxia turfgrass growth is limited. The interactive effects availability nine perennial ryegrass entries (Lolium perenne L.) one alkaligrass [Puccine...

Jelen tanulmány a Pilis délnyugati lábánál levő homoki gyertyános-tölgyeseinek (Corydali pumilae-Carpinetum) és cseres-tölgyesek (Fraxino orno-Quercetum cerridis) társulási viszo­nyait mutatja be 10-10 cönológiai felvétel alapján. A gyertyános-tölgyesek faji összetételére Fagetalia ele­mek viszonylag magas aránya jellemző. Lokálisan nevezetes fajai Veratrum nigrum, Piptatherum virescens, Primul...

Abstract Determining the relative risks of extinction declining taxa is important to delineate conservation priorities and guide investments in conservation. Brazil concentrates greatest number endangered avian on Earth, yet demographic information lacking for most them. Here we present distance-sampling population density estimates three bird endemic Pernambuco Endemism Center (PEC), criticall...

The earliest archaeological remains of dwelling huts built by Homo sapiens were found in various European Upper Paleolithic open-air camps. Although floors of huts were found in a small number of cases, modern organization of the home space that includes defined resting areas and bedding remains was not discovered. We report here the earliest in situ bedding exposed on a brush hut floor. It has...

Geese are large, herbivorous birds that graze in huge flocks in ways that may have a considerable impact on vegetation. This is exemplified best in two subspecies of snow geese, the lesser and the greater, both of which have increased dramatically in numbers in recent decades. In arctic coastal salt marshes, moderate goose grazing on Puccinellia phryganodes enhances plant production, but if it ...