23 Works

Data from: Emergence of weak‐intransitive competition through adaptive diversification and eco‐evolutionary feedbacks

Laure Gallien, Pietro Landi, Cang Hui & David M. Richardson
Indirect biotic interactions—such as intransitive competition—are increasingly recognized as being important in shaping ecological patterns in natural systems. Over long time‐scales, such indirect interactions may affect the evolution of species phenotypes, which in turn can modify these interactions, thereby begetting eco‐evolutionary feedbacks. If indirect intransitive interactions can emerge in situ during lineage diversification, they could profoundly affect species’ phenotypic diversity, temporal stability, and subsequent diversification rates. We address these questions by investigating the conditions under...

Data from: GloPL, a global data base on pollen limitation of plant reproduction

Joanne. M. Bennett, Janette. A. Steets, Jean. H. Burns, Walter Durka, Jana. C. Vamosi, Gerardo Arceo-Gómez, Martin Burd, Laura. A. Burkle, Allan. G Ellis, Leandro Freitas, Junmin Li, James. G. Rodger, Marina Wolowski, Jing Xia, Tia-Lynn Ashman & Tiffany. M. Knight
Plant reproduction relies on transfer of pollen from anthers to stigmas, and the majority of flowering plants depend on biotic or abiotic agents for this transfer. A key metric for characterizing if pollen receipt is insufficient for reproduction is pollen limitation, which is assessed by pollen supplementation experiments. In a pollen supplementation experiment, fruit or seed production by flowers exposed to natural pollination is compared to that following hand pollination either by pollen supplementation (i.e....

Data from: Reconstructing biological invasions using public surveys: a new approach to retrospectively assess spatio-temporal changes in invasive spread

Nitya Prakash Mohanty & John Measey
DRYAD_bullfrog occupancy_inputInput file for occupancy analyses used in the paper. Data matrix of detection (1)/non-detection(0) of Indian bullfrogs by key informants (obs 1-10) and field survey (obs 11) at 91 sites on the Andaman archipelago.DRYAD_perceptionData used in analyses of perception of the Indian bullfrog among key informants. Categorized as loss, benefit, neutral, and loss-benefit ('both').DRYAD_dispersal hubsData on 'dispersal hubs' and associated introductions within the Andaman archipelago for the Indian bullfrog. Dispersal hubs - Billyground-Nimbudera (BG-ND),...

Data from: Using routinely collected laboratory data to identify high rifampicin-resistant tuberculosis burden communities in the Western Cape Province, South Africa: a retrospective spatiotemporal analysis

Avery I. McIntosh, Helen E. Jenkins, Laura F. White, Marinus Barnard, Dana Thompson, Tania Dolby, John Simpson, Elizabeth M. Streicher, Mary B. Kleinman, Elizabeth J. Ragan, Paul D. Van Helden, Megan B. Murray, Robin M. Warren & Karen R. Jacobson
Background: South Africa has the highest tuberculosis incidence globally (781/100,000), with an estimated 4.3% of cases being rifampicin resistant (RR). Control and elimination strategies will require detailed spatial information to understand where drug-resistant tuberculosis exists and why it persists in those communities. We demonstrate a method to enable drug-resistant tuberculosis monitoring by identifying high-burden communities in the Western Cape Province using routinely collected laboratory data. Methods and findings: We retrospectively identified cases of microbiologically confirmed...

Data from: Plant population and maize grain yield: a global systematic review of rainfed trials

Stephanus J. Haarhoff & Pieter A. Swanepoel
Maize (Zea mays L.) productivity has increased globally as a result of improved genetics and agronomic practices. Plant population and row spacing are two key agronomic factors known to have a strong influence on maize grain yield. A systematic review was conducted to investigate the effects of plant population on maize grain yield, differentiating between rainfall regions, N input, and soil tillage system (conventional tillage [CT] and no-tillage [NT]). Data were extracted from 64 peer-reviewed...

Data from: Heterogeneity in local density allows a positive evolutionary relationship between self-fertilisation and dispersal

James Rodger, Pietro Landi, Cang Hui & James G. Rodger
Despite empirical evidence for a positive relationship between dispersal and self-fertilisation (selfing), theoretical work predicts that these traits should always be negatively correlated, and the Good Coloniser Syndrome of high dispersal and selfing (Cf. Baker’s Law) should not evolve. Critically, previous work assumes that adult density is spatiotemporally homogeneous, so selfing results in identical offspring production for all patches, eliminating the benefit of dispersal for escaping from local resource competition. We investigate the joint evolution...

Data from: Importance of soil legacy effects and successful mutualistic interactions during Australian acacia invasions in nutrient poor environments

Johannes J. Le Roux, Allan G. Ellis, Lise-Mari Van Zyl, Nicholas D. Hosking, Jan-Hendrik Keet & Florencia A. Yannelli
Non-native plants often alter environments they invade, favouring their own performance through positive feedbacks. Plant-soil interactions represent one such mechanism, but their complexity (e.g. invader-induced changes in soil nutrients, microbial communities, etc.) makes inferences of the precise mechanisms that benefit invaders difficult. Here we aimed to determine: 1) whether invasion by Australian acacias (genus Acacia L.) changes nitrogen-fixing soil microbial community diversity and structure, and 2) the importance of available rhizobial partners and overall invader-induced...

Data from: Interactions among predators and plant specificity protects herbivores from top predators

Christopher Bosc, Francois Roets, Cang Hui & Anton Pauw
The worldwide loss of top predators from natural and agricultural systems has heightened the need to understand how important they are in controlling herbivore abundance. The effect of top predators on herbivore species is likely to depend on 1) the importance of the consumption of intermediate predators by top predators (intra-guild predation; IGP), but also on 2) plant specificity by herbivores, because specialists may defend themselves better (enemy-free space; EFS). Insectivorous birds, as top predators,...

Data from: Urban nectarivorous bird communities in Cape Town, South Africa, are structured by ecological generalisation and resource distribution

Anina Coetzee, Phoebe Barnard & Anton Pauw
Biological communities are increasingly faced with novel urban habitats and their response may depend on a combination of biological and habitat traits. The response of pollinator species to urban habitats are of particular importance because all species involved in the pollination mutualism may be affected. Nectarivorous bird communities worldwide show varying tolerances to urban areas, but studies from Africa are lacking. We investigated nectarivorous bird communities in a medium-sized South African city and asked which...

Data from: Proximate causes of variation in dermal armour: insights from armadillo lizards

Chris Broeckhoven, P. L. Le Fras N. Mouton & Cang Hui
Although it is widely assumed that body armour in animals evolved to thwart predator attacks, assessing the role that predators may play in shaping defensive morphologies has proven to be difficult. Recent studies suggest that body armour might be influenced by additional factors besides predation, and/or even by sexual selection. We investigated variation in dermal armour in 13 populations of armadillo lizards (Ouroborus cataphractus), spanning the entire distribution range of the species. We obtained thickness...

Data from: Frequency dependence of pollinator visitation rates suggests that pollination niches can allow plant species coexistence

Gita Benadi & Anton Pauw
1. How do many species coexist within a trophic level? Resource niches are the classical answer, but in plants which share a small set of abiotic resources the possibilities for resource partitioning are limited. One possible explanation is that plant species have different pollination niches, with each species specialized to a subset of the available animal species. If this pollinator partitioning results in negative frequency dependence such that each plant species’ reproduction is reduced when...

Data from: The ghost of introduction past: spatial and temporal variability in the genetic diversity of invasive smallmouth bass

Genevieve Diedericks, Romina Henriques, Sophie Von Der Heyden, Olaf Weyl & Cang Hui
Understanding the demographic history of introduced populations is essential for unravelling their invasive potential and adaptability to a novel environment. To this end, levels of genetic diversity within the native and invasive range of a species are often compared. Most studies, however, focus solely on contemporary samples, relying heavily on the premise that the historic population structure within the native range has been maintained over time. Here, we assess this assumption by conducting a three-way...

Data from: Rethinking the scale and formulation of indices assessing organism vulnerability to warmer habitats

Raquel A. Garcia, Jessica L. Allen & Susana Clusella-Trullas
Ecologists often use indices or proxies to communicate complex ecological entities. Indices commonly known as Thermal Safety Margin, Habitat Thermal Quality and Hours of Restriction describe species' vulnerability to climate change by comparing organisms' thermal limits or preferences to available habitat temperatures. Ready access to temperature data, from global gridded datasets or limited in situ measurements, has made these indices popular for vulnerability assessments across taxonomic groups and regions. However, such coarse descriptions of thermal...

Data from: How maternal investment varies with environmental factors and the age and physiological state of wild tsetse Glossina pallidipes and Glossina morsitans morsitans

John W. Hargrove, M. Odwell Muzari & Sinead English
Theory suggests females should optimize resource allocation across reproductive bouts to maximize lifetime reproduction, balancing current and future reproductive efforts according to physiological state and projected survival and reproduction. Tests of these ideas focus on long-lived vertebrates: few measure age-related reproductive output in iteroparous invertebrates, or partition reserves between those allocated to offspring versus mothers. We investigated how maternal age, and environmental and physiological factors influence reproductive investment in wild tsetse, Glossina pallidipes Austen and...

Data from: On dangerous ground: the evolution of body armour in cordyline lizards

Chris Broeckhoven, Yousri El Adak, Cang Hui, Raoul Van Damme & Theodore Stankowich
Animal body armour is often considered an adaptation that protects prey against predatory attacks, yet comparative studies that link the diversification of these allegedly protective coverings to differential predation risk or pressure are scarce. Here, we examine the evolution of body armour, including spines and osteoderms, in Cordylinae, a radiation of southern African lizards. Using phylogenetic comparative methods, we attempt to identify the ecological and environmental correlates of body armour that may hint at the...

Data from: GlobTherm, a global database on thermal tolerances for aquatic and terrestrial organisms

Joanne M. Bennett, Piero Calosi, Susana Clusella-Trullas, Brezo Martínez, Jennifer Sunday, Adam C. Algar, Miguel B. Araújo, Bradford A. Hawkins, Sally Keith, Ingolf Kühn, Carsten Rahbek, Laura Rodríguez, Alexander Singer, Fabricio Villalobos, Miguel Ángel Olalla-Tárraga & Ignacio Morales-Castilla
How climate affects species distributions is a longstanding question receiving renewed interest owing to the need to predict the impacts of global warming on biodiversity. Is climate change forcing species to live near their critical thermal limits? Are these limits likely to change through natural selection? These and other important questions can be addressed with models relating geographical distributions of species with climate data, but inferences made with these models are highly contingent on non-climatic...

Data from: New insights on water buffalo genomic diversity and post-domestication migration routes from medium density SNP chip data

Licia Colli, Marco Milanesi, Elia Vajana, Daniela Iamartino, Lorenzo Bomba, Francesco Puglisi, Marcello Del Corvo, Ezequiel Luis Nicolazzi, Sahar Saad El-Din Ahmed, Jesus Rommel V. Herrera, Libertado Cruz, Shuju Zhang, Aixin Liang, Gouhua Hua, Ligou Yang, Xingjie Hao, Fuyuan Zuo, Song-Jia Lai, Shuilian Wang, Ruyu Liu, Yundeng Gong, Mahdi Mokhber, Yongjiang Mao, Feng Guan, Augustin Vlaic … & Liguo Yang
The domestic water buffalo is native to the Asian continent but through historical migrations and recent importations, nowadays has a worldwide distribution. The two types of water buffalo, i.e., river and swamp, display distinct morphological and behavioral traits, different karyotypes and also have different purposes and geographical distributions. River buffaloes from Pakistan, Iran, Turkey, Egypt, Romania, Bulgaria, Italy, Mozambique, Brazil and Colombia, and swamp buffaloes from China, Thailand, Philippines, Indonesia and Brazil were genotyped with...

Data from: Using public surveys to reliably and rapidly estimate the distributions of multiple invasive species on the Andaman archipelago

Nitya Prakash Mohanty, A. Sachin, Gayathri Selvaraj & Karthikeyan Vasudevan
To effectively manage multiple biological invasions, information on their distributions must be generated rapidly and over large spatial scales. Using public surveys in a false-positive occupancy framework, we reliably estimate the distributions of three synanthropic invasive species on the Andaman Islands.

Data from: Context-dependent costs and benefits of tuberculosis resistance traits in a wild mammalian host

Hannah F. Tavalire, Brianna R. Beechler, Peter E. Buss, Erin E. Gorsich, Eileen G. Hoal, Nikki Le Roex, Johannie M. Spaan, Robert S. Spaan, Paul D. Van Helden, Vanessa O. Ezenwa & Anna E. Jolles
Disease acts as a powerful driver of evolution in natural host populations, yet individuals in a population often vary in their susceptibility to infection. Energetic trade-offs between immune and reproductive investment lead to the evolution of distinct life-history strategies, driven by the relative fitness costs and benefits of resisting infection. However, examples quantifying the cost of resistance outside of the laboratory are rare. Here, we observe two distinct forms of resistance to bovine tuberculosis (bTB),...

Data from: Oxygen limitation is not the cause of death during lethal heat exposure in an insect

Philipp Lehmann, Marion Javal & John Terblanche
Oxygen- and capacity-limited thermal tolerance (OCLTT) is a controversial hypothesis claiming to explain variation in, and mechanistically determine, animal thermal limits. The lack of support from Insecta is typically argued to be a consequence of their high-performance respiratory systems. However, no studies have reported internal body oxygen levels during thermal ramping so it is unclear if changes in ambient gas are partially or fully offset by a compensatory respiratory system. Here we provide such an...

Data from: Autofertility and self-compatibility moderately benefit island colonization of plants

Mialy Razanajatovo, Mark Van Kleunen, Holger Kreft, Wayne Dawson, Franz Essl, Jan Pergl, Petr Pyšek, Marten Winter & Patrick Weigelt
Aim: The current geographical distribution of species largely reflects colonization success after natural long‐distance dispersal or introduction by humans. Plants with selfing ability should have an advantage when establishing on islands where mates and pollinators are limited (Baker's law). However, high percentages of dioecious and self‐incompatible species have been reported for some islands, possibly resulting from post‐colonization evolution. Given that such evolution is less likely to apply to alien species recently introduced to islands by...

Data from: Complete blood count reference intervals from a healthy adult urban population in Kenya

Geoffrey Omuse, Daniel Maina, Jane Mwangi, Caroline Wambua, Kiran Radia, Alice Kanyua, Elizabeth Kagotho, Mariza Hoffman, Peter Ojwang, Zul Premji, Kiyoshi Ichihara & Rajiv Erasmus
Background: There are racial, ethnic and geographical differences in complete blood count (CBC) reference intervals (RIs) and therefore it is necessary to establish RIs that are population specific. Several studies have been carried out in Africa to derive CBC RIs but many were not conducted with the rigor recommended for RI studies hence limiting the adoption and generalizability of the results. Method: By use of a Beckman Coulter ACT 5 DIFF CP analyser, we measured...

Data from: Impact of ecological redundancy on the performance of machine learning classifiers in vegetation mapping

Paul D. Macintyre, Adriaan Van Niekerk, Mark P. Dobrowolski, James L. Tsakalos & Ladislav Mucina
Vegetation maps are models of the real vegetation patterns and are considered important tools in conservation and management planning. Maps created through traditional methods can be expensive and time‐consuming, thus, new more efficient approaches are needed. The prediction of vegetation patterns using machine learning shows promise, but many factors may impact on its performance. One important factor is the nature of the vegetation–environment relationship assessed and ecological redundancy. We used two datasets with known ecological...

Registration Year

  • 2018
    23

Resource Types

  • Dataset
    23

Affiliations

  • Stellenbosch University
    23
  • African Institute for Mathematical Sciences
    4
  • German Center for Integrative Biodiversity Research
    3
  • University of Antwerp
    2
  • Universidade Federal de Goiás
    1
  • South African National Biodiversity Institute
    1
  • University of Adelaide
    1
  • Sao Paulo State University
    1
  • Queensland Health
    1
  • University of Washington
    1