2 Works

Data from: Chronotype variation drives night-time sentinel-like behaviour in hunter–gatherers

David Samson, Alyssa Crittenden, Ibrahim Mabulla, Audax Mabulla, Charles Nunn, Charles L. Nunn, David R. Samson, Audax Z. P. Mabulla, Ibrahim A. Mabulla & Alyssa N. Crittenden
Sleep is essential for survival, yet it also represents a time of extreme vulnerability to predation, hostile conspecifics, and environmental dangers. To reduce the risks of sleeping, the sentinel hypothesis proposes that group-living animals share the task of vigilance during sleep, with some individuals sleeping while others are awake. To investigate sentinel-like behaviour in sleeping humans, we investigated activity patterns at night among Hadza hunter-gatherers of Tanzania. Using actigraphy, we discovered that all subjects were...

Data from: Seed-dispersal networks respond differently to resource effects in open and forest habitats

Maximilian G. R. Vollstaedt, Stefan W. Ferger, Andreas Hemp, Kim M. Howell, Katrin Böhning-Gaese & Matthias Schleuning
While patterns in species diversity have been well studied across large-scale environmental gradients, little is known about how species' interaction networks change in response to abiotic and biotic factors across such gradients. Here we studied seed-dispersal networks on 50 study plots distributed over ten different habitat types on the southern slopes of Mt. Kilimanjaro, Tanzania, to disentangle the effects of climate, habitat structure, fruit diversity and fruit availability on different measures of interaction diversity. We...

Registration Year

  • 2017
    2

Resource Types

  • Dataset
    2

Affiliations

  • University of Dar es Salaam
    2
  • Duke University
    1
  • Senckenberg Biodiversity and Climate Research Centre
    1
  • University of Nevada Reno
    1
  • University of Bayreuth
    1
  • University of Toronto
    1
  • University of Nevada, Las Vegas
    1
  • Goethe University Frankfurt
    1