8 Works

Data from: Insect outbreaks alter nutrient dynamics in a southern African savanna: patchy defoliation of Colophospermum mopane savanna by Imbrasia belina larvae

Donovan B. De Swardt, Corli Wigley-Coetsee & Tim G. O’Connor
Severe defoliation is expected to affect nutrient cycling of an impacted system. Outbreaks of the lepidopteran Imbrasia belina (mopane worm) affect discrete patches of Colophospermum mopane trees in semi-arid savanna; larvae may completely defoliate trees for up to six weeks during each of the early and late growing seasons. We studied the impact of mopane worm outbreaks on the availability of nitrogen, phosphorus and potassium within mopane savanna by comparing defoliated with non-defoliated savanna patches....

Data from: Quantification of avian hazards to military aircraft and implications for wildlife management

Morgan B. Pfeiffer, Bradley F. Blackwell & Travis L. DeVault
Collisions between birds and military aircraft are common and can have catastrophic effects. Knowledge of relative wildlife hazards to aircraft (the likelihood of aircraft damage when a species is struck) is needed before estimating wildlife strike risk (combined frequency and severity component) at military airfields. Despite annual reviews of wildlife strike trends with civil aviation since the 1990s, little is known about wildlife strike trends for military aircraft. We hypothesized that species relative hazard scores...

Data from: Does wolf presence reduce moose browsing intensity in young forest plantations?

Suzanne T.S. Van Beeck Calkoen, Dries P.J. Kuijper, Hakan Sand, Navinder J. Singh, Sip E. Van Wieren, Joris P.G.M. Cromsigt, Joris P. G. M. Cromsigt, Suzanne T. S. Van Beeck Calkoen & Dries P. J. Kuijper
Large carnivores can be a key factor in shaping their ungulate prey’s behavior, which may affect lower trophic levels. While most studies on trade-offs between food acquisition and risk avoidance by ungulate prey species have been conducted in areas with limited human impact, carnivores are now increasingly returning to highly anthropogenic landscapes. Many of these landscapes are dominated by forestry, and ungulate-forestry conflicts are an increasing issue. The aim of this study was to test...

Data from: Sacrificial males: the potential role of copulation and predation in contributing to copepod sex-skewed ratios

Ryan J. Wasserman, Mark Weston, Olaf L.F. Weyl, P. William Froneman, Rebecca J. Welch, Tim J.F. Vink, Tatenda Dalu & Tim J. F. Vink
Predation is thought to play a selective role in the emergence of behavioural traits in prey. Differences in behaviour between prey demographics may, therefore, be driven by predation with select components of the population being less vulnerable to predators. While under controlled conditions prey demography has been shown to have consequences for predation success, investigations linking these implications to natural prey population demographics are scarce. Here we assess predator-prey dynamics between notonectid predators (backswimmers) and...

Data from: Behaviourally mediated predation avoidance in penguin prey: in situ evidence from animal-borne camera loggers

Jonathan M. Handley, Andréa Thiebault, Andrew Stanworth, David Schutt & Pierre Pistorius
Predator dietary studies often assume that diet is reflective of the diversity and relative abundance of their prey. This interpretation ignores species-specific behavioural adaptations in prey that could influence prey capture. Here, we develop and describe a scalable biologging protocol, using animal-borne camera loggers, to elucidate the factors influencing prey capture by a seabird, the gentoo penguin (Pygoscelis papua). From the video evidence, we show, for the first time, that aggressive behavioural defence mechanisms by...

Data from: Diet shifts by adult flightless dung beetles Circellium bacchus, revealed using DNA metabarcoding, reflect complex life histories

Graham I. H. Kerley, Marietjie Landman, Gentile F. Ficetola, Frédéric Boyer, Aurélie Bonin, Delphine Rioux, Pierre Taberlet & Eric Coissac
Life history changes may change resource use. Such shifts are not well understood in the dung beetles, despite recognized differences in larval and adult feeding ability. We use the flightless dung beetle Circellium bacchus to explore such shifts, identifying dung sources of adults using DNA metabarcoding, and comparing these with published accounts of larval dung sources. C. bacchus is traditionally considered to specialise on the dung of large herbivores for both larval and adult feeding....

Data from: Seascape genetics of the spiny lobster Panulirus homarus in the Western Indian Ocean: understanding how oceanographic features shape the genetic structure of species with high larval dispersal potential

Sohana P. Singh, Johan C. Groeneveld, Michael G. Hart-Davis, Björn C. Backeberg & Sandi Willows-Munro
This study examines the fine-scale population genetic structure and phylogeography of the spiny lobster Panulirus homarus in the Western Indian Ocean. A seascape genetics approach was used to relate the observed genetic structure based on 21 microsatellite loci to ocean circulation patterns, and to determine the influence of latitude, sea surface temperature (SST) and ocean turbidity (KD490) on population-level processes. At a geospatial level, the genetic clusters recovered corresponded to three putative subspecies, P. h....

Data from: Comparative population genomics reveals key barriers to dispersal in Southern Ocean penguins

Gemma V. Clucas, Jane L. Younger, Damian Kao, Louise Emmerson, Colin Southwell, Barbara Wienecke, Alex D. Rogers, Charles-Andre Bost, Gary D. Miller, Michael J. Polito, Patrick Lelliot, Jonathan Handley, Sarah Crofts, Richard A. Phillips, Michael J. Dunn, Karen J. Miller, Tom Hart & Patrick Lelliott
The mechanisms that determine patterns of species dispersal are important factors in the production and maintenance of biodiversity. Understanding these mechanisms helps to forecast the responses of species to environmental change. Here we used a comparative framework and genome-wide data obtained through RAD-seq to compare the patterns of connectivity among breeding colonies for five penguin species with shared ancestry, overlapping distributions, and differing ecological niches, allowing an examination of the intrinsic and extrinsic barriers governing...

Registration Year

  • 2018
    8

Resource Types

  • Dataset
    8

Affiliations

  • Nelson Mandela University
    8
  • University of Cape Town
    2
  • University of the Free State
    1
  • Monash University Malaysia
    1
  • Scientific Services
    1
  • Rhodes University
    1
  • University of Tasmania
    1
  • British Antarctic Survey
    1
  • University of New Hampshire
    1
  • University of Southampton
    1