Content with tag seed dispersal .

Angiosperm seeds lacking external flesh can be adapted for endozoochory

It is often assumed that only plants with a fleshy fruit disperse inside vertebrate guts, i.e. by “endozoochory”. However, only 8% of European angiosperms have a fleshy fruit, and endozoochory of other plants by herbivorous or granivorous birds and mammals is widespread in nature. Many terrestrial and aquatic plants disperse via endozoochory by migratory waterbirds, providing long-dispersal dispersal.

European Corvids disperse plants from 42 families by endozoochory

Members of the crow family (Corvidae) are known to disperse seeds by frugivory or by scatter hoarding, but are rarely recognized as vectors of plants lacking a fleshy fruit, or a large nut. A century ago, S.A. Heintze carried out extensive field studies of seed dispersal by 11 species of European Corvidae, especially Magpies Pica pica and Hooded Crows Corvus cornix. His work was published in Swedish and has been overlooked until now, and suggests that contemporary views about seed dispersal...

Cities may save some threatened species but not their ecological functions

Urbanization is one of the main causes of biodiversity loss worldwide. Wildlife responses to urbanization, however, are greatly variable and, paradoxically, some threatened species may achieve much larger populations in urban than in natural habitats. Urban conservation hotspots may therefore help some species avoid regional or even global extinctions, but not conserve their often overlooked ecological functions in the wild. This issue is being addressed in this study by using two species of...

Long-distance dispersal by migratory waterbirds

Modern literature on plant dispersal by birds focuses mainly on the importance of frugivory and scatter-hoarding, yet recent studies show that endozoochory by migratory waterbirds is an important mechanism of long-distance dispersal for a broad range of plants. Nevertheless, there is a lack of empirical field studies that identify the plants dispersed by waterbirds in a comprehensive manner. In particular, so far there are no detailed studies of the level of spatial variation in the plant...

The seed disperser role of macaws

Seed dispersal is one of the most studied plant-animal mutualisms. It has been proposed that the dispersal of many large-seeded plants from Neotropical forests was primarily conducted by extinct megafauna, and currently by livestock. This study demonstrates that three macaws are the main dispersants of the large-seeded motacú palm Attalea princeps, which is the biomass-dominant tree in the Bolivian Amazonian savannas.