Content with tag biogeography .

Human activities link fruit bat presence to Ebola virus disease outbreaks

A significant link between forest loss and fragmentation and outbreaks of Ebola virus disease (EVD) in humans has been documented. Deforestation may alter the natural circulation of viruses and change the composition, abundance, behaviour and possibly viral exposure of reservoir species. This in turn might increase contact between infected animals and humans. Fruit bats of the family Pteropodidae have been suspected as reservoirs of the Ebola virus. At present, the only evidence associating...

Global geographic patterns in the colours and sizes of animal dispersed fruits

Fruit colours attract animal seed dispersers, yet the causes of fruit colour diversity remain controversial. The lack of knowledge of large?scale spatial patterns in fruit colours has limited our ability to formulate and test alternative hypotheses to explain fruit colour, fruit size and fruit colour diversity. Spatial (especially latitudinal) variation in fruit colour, colour diversity and length has been described, and tested for correlations between fruit colour, length and plant habit,...

Avian eggshells coping with solar radiation

Solar radiation is an important driver of animal coloration, not only because of the effects of coloration on body temperature but also because coloration may protect from the deleterious effects of UV radiation. Indeed, dark coloration may protect from UV, but may increase the risk of overheating. In addition, the effect of coloration on thermoregulation should change with egg size, as smaller eggs have higher surface?volume ratios and greater convective coefficients than larger eggs, so...

The native crayfish is a non-native species

Anciently introduced species can be confounded with native species because introduction pre-dates the first species inventories or because of the loss of the collective memory of the introductions. Here, an integrative, multidisciplinary approach was followed to solve the status of a cryptogenic species, proposing that building on evidence from multiple disciplines can produce robust and clarifying insights.