Search or filter publications

Filter by type:

Filter by publication type

Filter by year:

to

Results

  • Showing results for:
  • Reset all filters

Search results

  • Journal article
    Crouch NMA, Tobias JA, 2022,

    The causes and ecological context of rapid morphological evolution in birds

    , ECOLOGY LETTERS, Vol: 25, Pages: 611-623, ISSN: 1461-023X
  • Journal article
    McFadden IR, Fritz SA, Zimmermann NE, Pellissier L, Kissling WD, Tobias JA, Schleuning M, Graham CHet al., 2022,

    Global plant-frugivore trait matching is shaped by climate and biogeographic history

    , ECOLOGY LETTERS, Vol: 25, Pages: 686-696, ISSN: 1461-023X
  • Journal article
    Morfopoulos C, Muller J-F, Stavrakou T, Bauwens M, De Smedt I, Friedlingstein P, Prentice IC, Regnier Pet al., 2022,

    Vegetation responses to climate extremes recorded by remotely sensed atmospheric formaldehyde

    , Global Change Biology, Vol: 28, Pages: 1809-1822, ISSN: 1354-1013

    Accurate monitoring of vegetation stress is required for better modelling and forecasting of primary production, in a world where heatwaves and droughts are expected to become increasingly prevalent. Variability in formaldehyde (HCHO) concentrations in the troposphere is dominated by local emissions of short-lived biogenic (BVOC) and pyrogenic volatile organic compounds. BVOCs are emitted by plants in a rapid protective response to abiotic stress, mediated by the energetic status of leaves (the excess of reducing power when photosynthetic light and dark reactions are decoupled, as occurs when stomata close in response to water stress). Emissions also increase exponentially with leaf temperature. New analytical methods for the detection of spatiotemporally contiguous extremes in remote-sensing data are applied here to satellite-derived atmospheric HCHO columns. BVOC emissions are shown to play a central role in the formation of the largest positive HCHO anomalies. Although vegetation stress can be captured by various remotely sensed quantities, spaceborne HCHO emerges as the most consistent recorder of vegetation responses to the largest climate extremes, especially in forested regions.

  • Journal article
    Ward D, Melbourne-Thomas J, Pecl GT, Evans K, Green M, McCormack PC, Novaglio C, Trebilco R, Bax N, Brasier MJ, Cavan EL, Edgar G, Hunt HL, Jansen J, Jones R, Lea M-A, Makomere R, Mull C, Semmens JM, Shaw J, Tinch D, van Steveninck TJ, Layton Cet al., 2022,

    Safeguarding marine life: conservation of biodiversity and ecosystems

    , REVIEWS IN FISH BIOLOGY AND FISHERIES, Vol: 32, Pages: 65-100, ISSN: 0960-3166
  • Journal article
    Chen C, Riley W, Prentice IC, Keenan Tet al., 2022,

    CO2 fertilization of terrestrial photosynthesis inferred from site to global scales

    , Proceedings of the National Academy of Sciences of USA, Vol: 119, ISSN: 0027-8424

    Global photosynthesis is increasing with elevated atmospheric CO2 concentrations, a response known as the CO2 fertilization effect (CFE), but the key processes of CFE are not constrained and therefore remain uncertain. Here we quantify CFE by combining observations from a globally distributed network of eddy covariance measurements with a novel analyticalframework based on three well-established photosynthetic optimization theories. We report a strong enhancement of photosynthesis across the observational network (9.1 gC m–2 yr–2) and show that the CFE is responsible for 44% of the gross primary production (GPP) enhancementsince the 2000s, with additional contributions primarily from warming (28%). Soil moisture and specific humidity are the two largest contributors to GPP interannual variation through their influences on plant hydraulics. Applying our framework to satellite observations and meteorological reanalysis data, we diagnose a global CO2-induced GPP trend of 4.4 gC m–2 yr–2, which is at least one-third stronger than the median trends of 13 Dynamic Global Vegetation Models and 8 satellite-derived GPP products, mainly due to their differences in the magnitude of CFE in evergreen broadleaf forests. These results highlight the critical role that CFE has had on the global carbon cycle in recent decades.

  • Journal article
    Weeks BC, Naeem S, Lasky JR, Tobias JAet al., 2022,

    Diversity and extinction risk are inversely related at a global scale

    , ECOLOGY LETTERS, Vol: 25, Pages: 697-707, ISSN: 1461-023X
  • Journal article
    Sol D, Garcia-Porta J, Gonzalez-Lagos C, Pigot AL, Trisos C, Tobias JAet al., 2022,

    A test of Darwin's naturalization conundrum in birds reveals enhanced invasion success in the presence of close relatives

    , ECOLOGY LETTERS, Vol: 25, Pages: 661-672, ISSN: 1461-023X
  • Journal article
    Stewart PS, Voskamp A, Santini L, Biber MF, Devenish AJM, Hof C, Willis SG, Tobias JAet al., 2022,

    Global impacts of climate change on avian functional diversity

    , ECOLOGY LETTERS, Vol: 25, Pages: 673-685, ISSN: 1461-023X
  • Journal article
    Medeiros GG, Antonio J, Harrison M, Della Coletta L, Soltangheisi A, Banks-Leite C, Duarte-Neto PJ, Martinelli LAet al., 2022,

    Effect of vertebrate exclusion on leaf litter decomposition in the coastal Atlantic forest of southeast Brazil

    , TROPICAL ECOLOGY, Vol: 63, Pages: 151-154, ISSN: 0564-3295
  • Journal article
    Wayman JP, Sadler JP, Pugh TAM, Martin TE, Tobias JA, Matthews TJet al., 2022,

    Assessing taxonomic and functional change in British breeding bird assemblages over time

    , Global Ecology and Biogeography, Vol: 31, Pages: 925-939, ISSN: 1466-822X

    AimThe aim was to identify the primary drivers of compositional change in breeding bird assemblages over a 40-year period.LocationBritain.Time periodFrom 1970 to 2010.Major taxa studiedBirds.MethodsUsing morphological trait measurements and a dataset of presence–absence data for British breeding birds surveyed in 10 km × 10 km hectads during two time periods, we calculated temporal taxonomic and functional beta diversity for each hectad alongside the change in species richness, mean nearest taxon distance (MNTD) and mean pairwise distance (MPD). We also estimated potential drivers of beta diversity, including climatic and land-use and land-cover (LULC) change variables, elevation and assemblage species richness in 1970 (1970rich). We used random forest regressions to test which variables best explained compositional change in the assemblages. We also assessed spatial taxonomic and functional change by analysing multiple-site beta diversity and pairwise dissimilarities between time periods.ResultsInitial (1970) species richness was the most important predictor (highest importance score) across all models, with areas characterized by higher initial richness experiencing less assemblage change overall. The coordinates included to capture spatial autocorrelation in the data were also important predictors of change. Most climate and LULC variables had relatively low explanatory power; elevation and average temperature were the most influential. All metrics increased slightly with increasing elevation, except for species richness change and MPD, which decreased.Main conclusionsThe composition of British breeding bird assemblages changed substantially between 1970 and 2010. Spatial heterogeneity increased, both taxonomically and functionally. We show evidence that hectads with larger assemblages have been buffered from temporal diversity change and that those at higher elevations changed more in composition than those at lower elevations. Overall, coarse-resolu

  • Journal article
    Fu Z, Ciais P, Prentice IC, Gentine P, Makowski D, Bastos A, Luo X, Green J, Stoy P, Yang H, Hajima Tet al., 2022,

    Atmospheric dryness reduces photosynthesis along a large range of soil water deficits

    , Nature Communications, Vol: 13, ISSN: 2041-1723

    Both low soil water content (SWC) and high atmospheric dryness (vapor pressure deficit, VPD) can negatively affect terrestrial gross primary production (GPP). The sensitivity of GPP to soil versus atmospheric dryness is difficult to disentangle, however, because of their covariation. Using global eddy-covariance observations, here we show that a decrease in SWC is not universally associated with GPP reduction. GPP increases in response to decreasing SWC when SWC is high and decreases only when SWC is below a threshold. By contrast, the sensitivity of GPP to an increase of VPD is always negative across the full SWC range. We further find canopy conductance decreases with increasing VPD (irrespective of SWC), and with decreasing SWC on drier soils. Maximum photosynthetic assimilation rate has negative sensitivity to VPD, and a positive sensitivity to decreasing SWC when SWC is high. Earth System Models underestimate the negative effect of VPD and the positive effect of SWC on GPP such that they should underestimate the GPP reduction due to increasing VPD in future climates.

  • Journal article
    Fornace K, Manin BO, Matthiopoulos J, Ferguson HM, Drakeley C, Ahmed K, Khoon KT, Ewers RM, Daim S, Chua THet al., 2022,

    A protocol for a longitudinal, observational cohort study of infection and exposure to zoonotic and vector-borne diseases across a land-use gradient in Sabah, Malaysian Borneo: a socio-ecological systems approach [version 1; peer review: 1 approved, 2 approved with reservations]

    , Wellcome Open Research, Vol: 7, ISSN: 2398-502X

    Introduction. Landscape changes disrupt environmental, social and biological systems, altering pathogen spillover and transmission risks. This study aims to quantify the impact of specific land management practices on spillover and transmission rates of zoonotic and vector-borne diseases within Malaysian Borneo. This protocol describes a cohort study with integrated ecological sampling to assess how deforestation and agricultural practices impact pathogen flow from wildlife and vector populations to human infection and detection by health facilities. This will focus on malaria, dengue and emerging arboviruses (Chikungunya and Zika), vector-borne diseases with varying contributions of simian reservoirs within this setting. Methods. A prospective longitudinal observational cohort study will be established in communities residing or working within the vicinity of the Stability of Altered Forest Ecosystems (SAFE) Project, a landscape gradient within Malaysian Borneo encompassing different plantation and forest types. The primary outcome of this study will be transmission intensity of selected zoonotic and vector-borne diseases, as quantified by changes in pathogen-specific antibody levels. Exposure will be measured using paired population-based serological surveys conducted at the beginning and end of the two-year cohort study. Secondary outcomes will include the distribution and infection rates of Aedes and Anopheles mosquito vectors, human risk behaviours and clinical cases reported to health facilities. Longitudinal data on human behaviour, contact with wildlife and GPS tracking of mobility patterns will be collected throughout the study period. This will be integrated with entomological surveillance to monitor densities and pathogen infection rates of Aedes and Anopheles mosquitoes relative to land cover. Within surrounding health clinics, continuous health facility surveillance will be used to monitor reported infections and febrile illnesses. Models will be develo

  • Journal article
    Phillips JA, Soto JSV, Pawar S, Koprivnikar J, Benesh DP, Molnar PKet al., 2022,

    The effects of phylogeny, habitat and host characteristics on the thermal sensitivity of helminth development

    , PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, Vol: 289, ISSN: 0962-8452
  • Journal article
    Colgan TJ, Arce AN, Gill RJ, Ramos Rodrigues A, Kanteh A, Duncan EJ, Li L, Chittka L, Wurm Yet al., 2022,

    Genomic signatures of recent adaptation in a wild bumblebee

    , Molecular Biology and Evolution, Vol: 39, Pages: 1-9, ISSN: 0737-4038

    Environmental changes threaten insect pollinators, creating risks for agriculture and ecosystem stability. Despite their importance, we know little about how wild insects respond to environmental pressures. To understand the genomic bases of adaptation in an ecologically important pollinator, we analyzed genomes of Bombus terrestris bumblebees collected across Great Britain. We reveal extensive genetic diversity within this population, and strong signatures of recent adaptation throughout the genome affecting key processes including neurobiology and wing development. We also discover unusual features of the genome, including a region containing 53 genes that lacks genetic diversity in many bee species, and a horizontal gene transfer from a Wolbachia bacteria. Overall, the genetic diversity we observe and how it is distributed throughout the genome and the population should support the resilience of this important pollinator species to ongoing and future selective pressures. Applying our approach to more species should help understand how they can differ in their adaptive potential, and to develop conservation strategies for those most at risk.

  • Journal article
    Piot N, Schweiger O, Meeus I, Yañez O, Straub L, Villamar-Bouza L, De la Rúa P, Jara L, Ruiz C, Malmstrøm M, Mustafa S, Nielsen A, Mänd M, Karise R, Tlak-Gajger I, Özgör E, Keskin N, Diévart V, Dalmon A, Gajda A, Neumann P, Smagghe G, Graystock P, Radzevičiūtė R, Paxton RJ, de Miranda JRet al., 2022,

    Honey bees and climate explain viral prevalence in wild bee communities on a continental scale

    , Scientific Reports, Vol: 12, ISSN: 2045-2322

    Viruses are omnipresent, yet the knowledge on drivers of viral prevalence in wild host populations is often limited. Biotic factors, such as sympatric managed host species, as well as abiotic factors, such as climatic variables, are likely to impact viral prevalence. Managed and wild bees, which harbor several multi-host viruses with a mostly fecal-oral between-species transmission route, provide an excellent system with which to test for the impact of biotic and abiotic factors on viral prevalence in wild host populations. Here we show on a continental scale that the prevalence of three broad host viruses: the AKI-complex (Acute bee paralysis virus, Kashmir bee virus and Israeli acute paralysis virus), Deformed wing virus, and Slow bee paralysis virus in wild bee populations (bumble bees and solitary bees) is positively related to viral prevalence of sympatric honey bees as well as being impacted by climatic variables. The former highlights the need for good beekeeping practices, including Varroa destructor management to reduce honey bee viral infection and hive placement. Furthermore, we found that viral prevalence in wild bees is at its lowest at the extreme ends of both temperature and precipitation ranges. Under predicted climate change, the frequency of extremes in precipitation and temperature will continue to increase and may hence impact viral prevalence in wild bee communities.

  • Journal article
    Wong Y, Rosindell J, 2022,

    Dynamic visualisation of million-tip trees: the OneZoom project

    , Methods in Ecology and Evolution, Vol: 13, Pages: 303-313, ISSN: 2041-210X

    1. The complete tree of life is now available, but methods to visualise it are still needed to meet needs in research, teaching and science communication. Dynamic visualisation of million-tip trees requires many challenges in data synthesis, data handling and computer graphics to be overcome.2. Our approach is to automate data processing, synthesise data from a wide range of available sources, then to feed these data to a client-side visualisation engine in parts. We develop a way to store the whole tree topology locally in a highly compressed form, then dynamically populate metadata such as text and images as the user explores.3. The result is a seamless and smooth way to explore the complete tree of life, including images and metadata, even on relatively old mobile devices.4. The underlying methods developed have applications that transcend tree of life visualisation. For the whole complete tree, we describe automated ID mappings between well known resources without resorting to taxonomic name resolution, automated methods to collate sets of public domain representative images for higher taxa, and an index to measure public interest of individual species. 5. The visualisation layout and the client user interface are both abstracted components of the codebase enabling other zoomable tree layouts to be swapped in, and supporting multiple applications including exhibition kiosks and digital art.6. After 10 years of work, our tree of life explorer is now broadly complete, it has attracted nearly 1.5 million online users, and is backed by a novel long-term sustainability plan. We conclude our description of the OneZoom project by suggesting the next challenges that need to be solved in this field: extinct species and guided tours around the tree.

  • Journal article
    Williams C, Kirby A, Marghoub A, Kever L, Ostashevskaya-Gohstand S, Bertazzo S, Moazen M, Abzhanov A, Herrel A, Evans SE, Vickaryous Met al., 2022,

    A review of the osteoderms of lizards (Reptilia: Squamata)

    , BIOLOGICAL REVIEWS, Vol: 97, Pages: 1-19, ISSN: 1464-7931
  • Journal article
    Chik HYJ, Estrada C, Wang Y, Tank P, Lord A, Schroeder Jet al., 2022,

    Individual variation in reaction norms but no directional selection in reproductive plasticity of a wild passerine population

    , Ecology and Evolution, Vol: 12, ISSN: 2045-7758

    In the plant–insect–insectivorous bird food chain, directional changes in climate can result in mismatched phenology, potentially affecting selection pressures. Phenotypic plasticity in the timing of breeding, characterized by reaction norm slopes, can help maximize fitness when faced with earlier prey emergence. In temperate passerines, the timing of tree budburst influences food availability for chicks through caterpillar phenology and the resulting food abundance patterns. Thus, the timing of tree budburst might serve as a more direct proxy for the cue to time egg-laying. The evolutionary potential of breeding plasticity relies on heritable variation, which is based upon individual variation, yet studies on individual variation in plasticity are few. Here, we tested for the laying date—budburst date and the clutch size—laying date reaction norms, and examined 1) the among-individual variance in reaction norm intercepts and slopes; and 2) the selection differentials and gradients on these intercepts and slopes. Using long-term data of oak (genus Quercus) budburst and blue tit (Cyanistes caeruleus) reproduction, we applied within-subject centering to detect reaction norms, followed by bivariate random regression to quantify among-individual variance in reaction norm properties and their covariance with fitness. Individuals significantly differed in intercepts and slopes of both laying date—budburst date and clutch size—laying date reaction norms, and directional selection was present for an earlier laying date and a larger clutch size (intercepts), but not on plasticity (slopes). We found that individuals have their own regimes for adjusting egg-laying and clutch size. This study provides further support of individual variation of phenotypic plasticity in birds.

  • Journal article
    Williams JJ, Freeman R, Spooner F, Newbold Tet al., 2022,

    Vertebrate population trends are influenced by interactions between land use, climatic position, habitat loss and climate change

    , GLOBAL CHANGE BIOLOGY, Vol: 28, Pages: 797-815, ISSN: 1354-1013
  • Journal article
    Kirwan GM, Broughton RK, Lees AC, Ottenburghs J, Tobias JAet al., 2022,

    The ‘Meidum geese’ revisited: Early historical art is not a suitable basis for taxonomic speculation

    , Journal of Archaeological Science: Reports, Vol: 41, Pages: 1-5, ISSN: 2352-409X

    Romilio (2021) used a taxonomic scoring system to compare differences between three species of geese (Anseriformes) depicted in the Chapel of Itet, one of which he speculated might represent an undescribed (presumably now extinct) species. Despite some apparently distinctive features, the depiction has traditionally been associated with the well-known modern species, red-breasted goose (Branta ruficollis). We discuss limitations in applying the Tobias et al. (2010) scoring system to cases such as this, for which it was not designed, and we outline the many pitfalls that must be considered when attempting to identify historical artwork of birds using examples discussed recently in the ornithological literature. We conclude that the illustrations proposed by Romilio to represent a new Branta goose species are within the range of known plumage variation and potential artistic licence for red-breasted goose, and that this very probably is the species upon which the artwork was based. More generally, we caution against applying the Tobias criteria to cases where a series of specimens cannot be measured, and highlight the difficulties of using illustrations to inform taxonomy.

  • Journal article
    Chaplin-Kramer R, Brauman KA, Cavender-Bares J, Diaz S, Duarte GT, Enquist BJ, Garibaldi LA, Geldmann J, Halpern BS, Hertel TW, Khoury CK, Krieger JM, Lavorel S, Mueller T, Neugarten RA, Pinto-Ledezma J, Polasky S, Purvis A, Reyes-Garcia V, Roehrdanz PR, Shannon LJ, Shaw MR, Strassburg BBN, Tylianakis JM, Verburg PH, Visconti P, Zafra-Calvo Net al., 2022,

    Conservation needs to integrate knowledge across scales

    , NATURE ECOLOGY & EVOLUTION, Vol: 6, Pages: 118-119, ISSN: 2397-334X
  • Journal article
    hill S, Cavan E, 2022,

    Commercial fishery disturbance of the global ocean biological carbon sink

    , Global Change Biology, Vol: 28, Pages: 1212-1221, ISSN: 1354-1013

    Plankton drive a major sink of carbon across the global oceans. Dead plankton, their faeces and the faeces of plankton feeders, form a huge rain of carbon sinking to the seabed and deep ocean, reducing atmospheric CO2 levels and thus helping to regulate the climate. Any change in plankton communities, ecosystems or habitats will perturb this carbon sink, potentially increasing atmospheric CO2. Fishing is a major cause of ocean ecosystem disturbance affecting all trophic levels including plankton, but its potential impact on the carbon sink is unknown. As both fisheries and the carbon sink depend on plankton there is spatial overlap of these fundamental ecosystem services. Here we provide the first global maps of this spatial overlap. Using an upper quartile analysis, we show that 21% of the total upper ocean carbon sink (export) and 39% of fishing effort globally are concentrated in zones of intensive overlap, representing 9% of the ocean surface area. This overlap is particularly evident in the Northeast Atlantic suggesting this region should be prioritised in terms of research and conservation measures to preserve the high levels of sinking carbon. Small pelagic fish dominate catches here and globally, and their exploitation could reduce important faecal pellet carbon sinks and cause trophic cascades affecting plankton communities. There is an urgent need to recognise that, alongside climate change, fishing might be a critical influence on the ability of the ocean to sequester atmospheric CO2. Improved understanding of this influence, and how it will change with the climate, will be important for realising a sustainable balance of the twin needs for productive fisheries and strong carbon sinks.

  • Journal article
    Russell M, Cator L, 2022,

    No impact of biocontrol agent’s predation cues on development time or size of surviving Aedes al-bopictus under optimal nutritional availability

    , Insects, Vol: 13, ISSN: 2075-4450

    Cyclopoid copepods have been applied successfully to limit populations of highly invasive Aedes albopictus mosquitoes that can transmit diseases of public health importance. However, there is concern that changes in certain mosquito traits, induced by exposure to copepod predation, might increase the risk of disease transmission. In this study, third instar Ae. albopictus larvae (focal individuals) were exposed to Megacyclops viridis predator cues associated with both the consumption of newly hatched mosquito larvae and attacks on focal individuals. The number of newly hatched larvae surrounding each focal larva was held constant to control for density effects on size, and the focal individual’s day of pupation and wing length were recorded for each replicate. Exposing late instar Ae. albopictus to predation decreased their chances of surviving to adulthood, and three focal larvae that died in the predator treatment showed signs of melanisation, indicative of wounding. Among surviving focal Ae. albopictus, no significant difference in either pupation day or wing length was observed due to copepod predation. The absence of significant sublethal impacts from M. viridis copepod predation on surviving later stage larvae in this analysis supports the use of M. viridis as a biocontrol agent against Ae. albopictus.

  • Journal article
    Huxley PJ, Murray KA, Pawar S, Cator LJet al., 2022,

    Competition and resource depletion shape the thermal response of population fitness in <i>Aedes aegypti</i>

    , COMMUNICATIONS BIOLOGY, Vol: 5
  • Journal article
    Russell MC, Herzog CM, Gajewski Z, Ramsay C, El Moustaid F, Evans MV, Desai T, Gottdenker NL, Hermann SL, Power AG, McCall ACet al., 2022,

    Both consumptive and non-consumptive effects of predators impact mosquito populations and have implications for disease transmission

    , eLife, Vol: 11, Pages: 1-23, ISSN: 2050-084X

    Predator-prey interactions influence prey traits through both consumptive and non-consumptive effects, and variation in these traits can shape vector-borne disease dynamics. Meta-analysis methods were employed to generate predation effect sizes by different categories of predators and mosquito prey. This analysis showed that multiple families of aquatic predators are effective in consumptively reducing mosquito survival, and that the survival of Aedes, Anopheles, and Culex mosquitoes is negatively impacted by consumptive effects of predators. Mosquito larval size was found to play a more important role in explaining the heterogeneity of consumptive effects from predators than mosquito genus. Mosquito survival and body size were reduced by non-consumptive effects of predators, but development time was not significantly impacted. In addition, Culex vectors demonstrated predator avoidance behavior during oviposition. The results of this meta-analysis suggest that predators limit disease transmission by reducing both vector survival and vector size, and that associations between drought and human West Nile virus cases could be driven by the vector behavior of predator avoidance during oviposition. These findings are likely to be useful to infectious disease modelers who rely on vector traits as predictors of transmission.

  • Journal article
    Leimberger KG, Dalsgaard B, Tobias JA, Wolf C, Betts MGet al., 2022,

    The evolution, ecology, and conservation of hummingbirds and their interactions with flowering plants

    , Biological Reviews, Vol: 97, ISSN: 1464-7931

    The ecological co-dependency between plants and hummingbirds is a classic example of a mutualistic interaction: hummingbirds rely on floral nectar to fuel their rapid metabolisms, and more than 7000 plant species rely on hummingbirds for pollination. However, threats to hummingbirds are mounting, with 10% of 366 species considered globally threatened and 60% in decline. Despite the important ecological implications of these population declines, no recent review has examined plant–hummingbird interactions in the wider context of their evolution, ecology, and conservation. To provide this overview, we (i) assess the extent to which plants and hummingbirds have coevolved over millions of years, (ii) examine the mechanisms underlying plant–hummingbird interaction frequencies and hummingbird specialization, (iii) explore the factors driving the decline of hummingbird populations, and (iv) map out directions for future research and conservation. We find that, despite close associations between plants and hummingbirds, acquiring evidence for coevolution (versus one-sided adaptation) is difficult because data on fitness outcomes for both partners are required. Thus, linking plant–hummingbird interactions to plant reproduction is not only a major avenue for future coevolutionary work, but also for studies of interaction networks, which rarely incorporate pollinator effectiveness. Nevertheless, over the past decade, a growing body of literature on plant–hummingbird networks suggests that hummingbirds form relationships with plants primarily based on overlapping phenologies and trait-matching between bill length and flower length. On the other hand, species-level specialization appears to depend primarily on local community context, such as hummingbird abundance and nectar availability. Finally, although hummingbirds are commonly viewed as resilient opportunists that thrive in brushy habitats, we find that range size and forest dependency are key predic

  • Journal article
    Guissou C, Quinlan MM, Sanou R, Ouedraogo RK, Namountougou M, Diabate Aet al., 2022,

    Preparing an insectary in Burkina Faso to support research in genetic technologies for malaria control

    , Vector-Borne and Zoonotic Diseases, Vol: 22, Pages: 1-11, ISSN: 1530-3667

    The Institut de Recherche en Sciences de la Santé (IRSS) of Burkina Faso, West Africa, was the first African institution to import transgenic mosquitoes for research purposes. A shift from the culture of mosquito research to regulated biotechnology research and considerable management capacity is needed to set up and run the first insectary for transgenic insects in a country that applied and adapted the existing biosafety framework, first developed for genetically modified (GM) crops, to this new area of research. The additional demands arise from the separate regulatory framework for biotechnology, referencing the Cartagena Protocol on Biosafety, and the novelty of the research strain, making public understanding and acceptance early in the research pathway important. The IRSS team carried out extensive preparations following recommendations for containment of GM arthropods and invested efforts in local community engagement and training with scientific colleagues throughout the region. Record keeping beyond routine practice was established to maintain evidence related to regulatory requirements and risk assumptions. The National Biosafety Agency of Burkina Faso, Agence Nationale de Biosécurité (ANB), granted the permits for import of the self-limiting transgenic mosquito strain, which took place in November 2016, and for conducting studies in the IRSS facility in Bobo-Dioulasso. Compliance with permit terms and conditions of the permits and study protocols continued until the conclusion of studies, when the transgenic colonies were terminated. All this required close coordination between management and the insectary teams, as well as others. This article outlines the experiences of the IRSS to support others undertaking such studies. The IRSS is contributing to the ongoing development of genetic technologies for malaria control, as a partner of Target Malaria. The ultimate objective of the innovation is to reduce malaria transmission by using

  • Book chapter
    Hawkins AFA, Seddon N, Tobias JA, Safford RJ, Goodman SMet al., 2022,

    MESITORNITHIDAE, MESITES

    , The New Natural History of Madagascar: Volume 1-2, Pages: 1653-1657
  • Journal article
    Bowler E, Lefebvre VA, Pfeifer M, Ewers RMet al., 2022,

    Optimising sampling designs for habitat fragmentation studies

    , Methods in Ecology and Evolution, Vol: 13, Pages: 217-229, ISSN: 2041-210X

    Habitat fragmentation has become one of the largest areas of research in conservation biology. Empirical studies into habitat fragmentation impacts typically measure ecological responses to metrics describing fragmentation processes, for example ‘distance to the nearest forest edge’, ‘forest fragment area’ and ‘landscape habitat amount’. However, these studies often fail to sample across representative ranges of fragmentation metrics characterising the study region. They therefore lack the data to account for correlation among multiple fragmentation metrics and for spatial autocorrelation among sample sites, which reduces the strength of derived predictive models.Here, we draw on approaches used in the mining and soil science industry to develop standardised and repeatable protocols for designing optimised sampling schemes of biodiversity in fragmented landscapes that meet three criteria: the distance between sample sites is maximised to reduce spatial autocorrelation, the full range of values of the metrics of interest are sampled and the confounding effects of correlated metrics are minimised.We show that our computational methods can optimise the placement of sample sites in fragmented landscapes to minimise, and in some cases to entirely avoid, over- or under-sampling of fragmentation metrics. Our method is flexible enough to cater for any continuous (e.g. maps of percentage tree cover) or categorical (e.g. habitat and land use types) fragmentation metric, and to simultaneously handle combinations of multiple fragmentation metrics and habitat types. We implement our methods as open-source code which includes options to mask invalid or inaccessible regions, update designs to adapt to unforeseen constraints in the field and suggest optimal numbers of sample sites for given design criteria.Using a case study landscape, we demonstrate how the approach improves on manually generated sampling designs. We also show that the methods a

  • Journal article
    Halfter S, Cavan EL, Butterworth P, Swadling KM, Boyd PWet al., 2022,

    "Sinking dead"-How zooplankton carcasses contribute to particulate organic carbon flux in the subantarctic Southern Ocean

    , LIMNOLOGY AND OCEANOGRAPHY, Vol: 67, Pages: 13-25, ISSN: 0024-3590

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://www.imperial.ac.uk:80/respub/WEB-INF/jsp/search-t4-html.jsp Request URI: /respub/WEB-INF/jsp/search-t4-html.jsp Query String: id=562&limit=30&resgrpMemberPubs=true&resgrpMemberPubs=true&page=11&respub-action=search.html Current Millis: 1739494896401 Current Time: Fri Feb 14 01:01:36 GMT 2025