9 Works

Data: Drought and fire determine juvenile and adult woody diversity and dominance in a semi-arid African savanna

Felix Trotter, Caroline Lehmann, Jason Donaldson, Happy Mangena, Catherine Parr Parr & Sally Archibald
Aim: To understand how communities of adult and juvenile (seedlings and saplings) woody plants were impacted by fire and the 2014 – 2016 El Niño drought in Kruger National Park, South Africa. Methods: We used a landscape scale fire experiment spanning 2013-2019 in a semi-arid savanna in the central west of Kruger National Park (mean annual precipitation, 543 mm). Adult and juvenile woody species composition were recorded during and after the drought in 40 plots...

Data from: Quantifying the environmental limits to fire spread in grassy ecosystems

Ann Carla Staver, Anabelle Cardoso, Sally Archibald, William Bond, Corli Coetsee, Matthew Forrest, Navashni Govender, David Lehmann, Loic Makaga, Nokukhanya Mpanza, Josue Edzang Ndong, Aurelie Koumba Pambo, Tercia Strydom, David Tilman & Peter Wragg
Modeling fire spread as an infection process is intuitive: an ignition lights a patch of fuel, which infects its neighbor, and so on. Infection models produce non-linear thresholds, whereby fire spreads only when fuel connectivity and infection probability are sufficiently high. These thresholds are fundamental both to managing fire and to theoretical models of fire spread, whereas applied fire models more often apply quasi-empirical approaches. Here, we resolve this tension by quantifying thresholds in fire...

East African countries' data on late initiation of antenatal care

Chenai Mlandu
Background: Early antenatal care is critical for the mother and newborn’s health. Antenatal care is often delayed in Sub-Saharan Africa. The study aims to examine the trends and determinants of late antenatal care initiation in the Democratic Republic of Congo, Kenya, and Tanzania from 2007 to 2016. Methods: The study employed Demographic Health Surveys data of reproductive-age women seeking antenatal care in the Democratic Republic of Congo (2007-2013/14), Kenya (2008-2014), and Tanzania (2010-2015/16). Bivariate and...

Starting the recycling engine: how far back in time can we fingerprint crust in Earth’s mantle?

Sebastian Tappe , Katie A. Smart & Richard A. Stern
The nature of the tectonic processes that shaped the early Earth remain unresolved, hampered not only by the sparse Early Archaean crustal rock record, but also by the dearth of tangible mantle samples (e.g., xenoliths and diamonds) older than 3 Ga. Investigating the Archaean mantle provides a complementary foil to the knowledge gleaned from the early Earth crust, and can be used to trace the onset of crustal recycling, but also to evaluate the secular...

Hierarchy of fear: experimentally testing ungulate reactions to lion, African wild dog and cheetah

Liana Zanette, Noa Rigoudy, Michael Clinchy, Mike Peel, Sarah Huebner & Craig Packer
Experiments have begun demonstrating that the fear (antipredator responses) large carnivores inspire in ungulates can shape ecosystem structure and function. Most such experiments have focused on the impacts of either just one large carnivore, or all as a whole, rather than the different impacts different large carnivores may have in intact multi-predator-prey systems. Experimentally testing the relative fearfulness ungulates demonstrate toward different large carnivores is a necessary first step in addressing these likely differing impacts....

Twin epidemics: the effects of HIV and systolic blood pressure on mortality risk in rural South Africa 2010-2019

Nicole Angotti, Samuel Clark, F. Xavier Gómez-Olivé, Brian Houle, Chodziwadziwa Kabudula Whiteson, Jane Menken, Sanyu Mojola , Enid Schatz , Andrea Tilstra , Jill Williams, Vusi Dlamini & Erin Ice

Reasons for extreme Th/U zoning of zircon in magmatic rocks: examples from the Bushveld Complex

Armin Zeh , Dominik Gudelius & Allan H Wilson
Zircons of magmatic rocks can show enormous variations in Th/U ratios (0.2 to 100) and extreme Th/U zoning. We present data from felsic and mafic rocks of the Bushveld Complex in South Africa. Zircon grains in mafic cumulate rocks reveal Th/U ratios up to 70, those in felsic rocks barely exceed 1.0. In mafic rocks zircon mostly occur together with Rt-Bt-Kfs-Qtz in intercumulus domains, and crystallized during final magma cooling between 900 and 700°C, after...

Grazing lawns and overgrazing in frequently grazed grass communities

Gareth Hempson, Kate Parr, Caroline Lehmann & Sally Archibald
Frequent grazing can establish high forage value grazing lawns supporting high grazer densities, but can also produce overgrazed grass communities with unpalatable or low grass basal cover, supporting few grazers. Attempts to create grazing lawns via concentrated grazing, with a goal to increase grazer numbers, are thus risky without knowing how environmental conditions influence the likelihood of each outcome. We collected grass species and trait data from 33 frequently grazed grass communities across eastern South...

Raw data for the samples collected from Hole B of the ICDP DSeis project at the Moab Khotsong Gold Mine in South Africa

Takeshi Miyamoto, Tetsuro Hirono, Yuki Yokoyama, Shunya Kaneki, Yuhji Yamamoto, Tsuyoshi Ishikawa, Akira Tsuchiyama, Ikuo Katayama, Yasuo Yabe, Martin Ziegler, Raymond Durrheim & Hiroshi Ogasawara
This data set is corresponding to the Miyamoto, T. et al. “Characteristics of Seismogenic Fault Rock Related to the 2014 Orkney Earthquake (M5.5) Beneath the Moab Khotsong Gold Mine, South Africa” Geophysical Research Letters, 2022. This data set shows physical property, magnetic susceptibility, mineral assemblage, and element composition of all Hole B subsamples, and frictional properties of 5 Hole B subsamples.

Registration Year

  • 2022
    9

Resource Types

  • Dataset
    7
  • Text
    2

Affiliations

  • University of the Witwatersrand
    9
  • University of Minnesota
    2
  • South African National Parks
    2
  • University of Liverpool
    2
  • Princeton University
    1
  • University of Michigan–Ann Arbor
    1
  • The Ohio State University
    1
  • University of Alberta
    1
  • Ritsumeikan University
    1
  • Australian National University
    1