Recent Submissions

  • Zircon geochronological and geochemical insights into pluton building and volcanic-hypabyssal-plutonic connections: Oki-Dōzen, Sea of Japan - a complex intraplate alkaline volcano

    Scarrow, Jane; Chamberlain, Katy J.; Montero, Pilar; Horstwood, Matthew S.A.; Kimura, Jun-Ichi; Tamura, Yoshihiko; Chang, Qing; Barclay, Jenni; University of Granada, Campus Fuentenueva, Granada, Spain; University of East Anglia; et al. (Mineralogical Society of America, 2021)
    The relationship between plutonic and volcanic components of magmatic plumbing systems continues to be a question of intense debate. The Oki-Dōzen Islands, Sea of Japan, preserve outcrops of temporally-associated plutonic, hypabyssal and volcanic rocks. Juxtaposition of these, by post-intrusion uplift, placed Miocene syenites in inferred faulted contact with volcanic trachytes that are cut by rhyolite hypabyssal dikes. This provides a window deep into the timing and origins of magma storage architecture and dynamics. Our aim is to determine what the age and composition of zircon, which is ubiquitous in all samples, can reveal about the plutonic-volcanic connection. Here we show magma source characteristics are recorded in zircon Hf isotopes whereas, in addition to source composition, differentiation processes - assimilation of heterogeneous hydrothermally altered crust and extensive fractional crystallization - are preserved in zircon O isotopes and trace elements, respectively. Combined with new U-Th-Pb SHRIMP zircon ages, 6.4–5.7 Ma, the compositional data show pluton formation was by protracted amalgamation of discrete magma pulses. The rhyolite dike preserves an evolved fraction segregated from these. Synchronous with plutonism was volcanic eruption of trachyte magma derived from the same source, but apparently stalled at a relatively shallow depth. Stalling occurred at least above the zone of amphibole stability since amphibole-compatible Sc and Ti were not depleted in the trachyte melt - resulting in elevated values of these in the volcanic, compared to the plutonic, zircon. Identifying smaller episodic magma pulses in a larger magmatic complex places constraints on potential magma fluxes and eruptible volumes. Distinct from high-flux, large volume, plume-related ocean islands with extensive vertically distributed multi-stage magmatic reservoirs or subduction-related transcrustal magma reservoirs, Oki-Dōzen was a low-flux system with incremental pluton growth and small- to moderate-scale eruptions.
  • No single model for super-sized eruptions and their magma bodies

    Wilson, Colin J. N.; Cooper, George F; Chamberlain, Katy; Barker, Simon J; Myers, Madison L.; Illsley-Kemp, Finnigan; Farrell, Jamie; Victoria University of Wellington; Cardiff University; University of Derby; et al. (Nature, 2021-07-27)
    The largest explosive volcanic eruptions on Earth (‘supereruptions’) generate widespread ash-fall blankets and voluminous ignimbrites with accompanying caldera collapse. However, the mechanisms of generation, storage and evacuation of the parental silicic magma bodies remain controversial. In this Review, we synthesise field and laboratory evidence from Quaternary supereruptions to illustrate the great diversity in these phenomena. Despite their size, some supereruptions started mildly over weeks to months before escalating into climactic activity, whereas others went into vigorous activity immediately. Some eruptions occupied days or weeks, and others were prolonged over decades. Some were sourced from single bodies of magma, and others from multiple magma bodies that were simultaneously or sequentially tapped. In all cases the crystal-richer, deeper roots (>10 km) of the magmatic systems had lifetimes of tens to hundreds of thousands of years or more. In contrast, the erupted magmas were assembled at shallower depths (4-10 km) on shorter timescales, sometimes only centuries. Geological knowledge of past events, combined with modern geophysical techniques, demonstrates how large silicic caldera volcanoes (with past supereruptions) operate today. Future research is needed particularly on the processes behind modern volcanic unrest and the signals that might herald an impending eruption, regardless of size, at such volcanoes.
  • Self-identification of electronically scanned signatures (ESS) and digitally constructed signatures (DCS)

    Kazmierczyk, Zuzanna; Turner, Ian J.; University of Derby (Informa UK, 2021-07-05)
    The use of electronic signatures as a form of identification is increasingly common, yet they have been shown to lack the dynamic features found in online signatures. In this study, handwritten signatures were scanned to produce electronically scanned signatures (ESS) which were then digitally altered to produce digitally constructed signatures (DCS). The ESS and DCS were presented back to participants to identify which were genuine. Only 1% of participants correctly identified all signatures, with a mean score of 57.6% identifications. The lack of self-recognition of ESS raises questions on their reliability and usefulness as means of personal identification.
  • Sea urchin diseases: Effects from individuals to ecosystems

    Sweet, Michael; University of Derby (Elsevier, 2020-01-08)
    Diseases affect all facets of life, at the cell, tissue, organ, individual, population, and ecosystem level, and those associated with marine organisms are no exception. In particular, echinoids are one group which have had well-documented disease outbreaks in the marine biome. For example, over 40 species of sea stars from the west coast of North America have recently been found to suffer from an outbreak of a disease known as sea star wasting syndrome or Asteroid idiopathic wasting syndrome (Eisenlord et al., 2016). Although similar “die-offs” have occurred in the 1970s, 1980s, and 1990s, this recent outbreak has run at unprecedented magnitude, with upward of 60% disease prevalence at some sites and records across a wide geographic area (e.g., 84% of sites surveyed within one study)—see www.eeb.ucsc.edu. This is now being heralded as the greatest recorded mass mortality of a marine animal, exceeding the previous record, which was Diadema antillarum and their die-off in the Caribbean during the 1980s (Lessios et al., 1984a, Mumby et al., 2006). However, quite surprisingly, the causal agent for both diseases remains unknown (Lessios et al., 1984b, Miner et al., 2018). Various hypotheses have been suggested, from bacteria to viruses, however, evidence is lacking to point convincingly to one agent over another (Clemente et al., 2014).
  • Completing the life cycle of a broadcast spawning coral in a closed mesocosm

    Craggs, Jamie; Guest, James; Davis, Michelle; Sweet, Michael; University of Derby; Newcastle University; Horniman Museum and Gardens, London (Informa UK Limited, 2020-04-28)
    Studies of broadcast spawning in corals are fundamental to our understanding of early life history characteristics, reproductive biology, restoration etc. Spawning of corals for research is routinely conducted, but this is mostly restricted to sites adjacent to reefs and from broodstock collected from the wild just prior to gamete release. Only recently has it been possible to induce predictable broadcast spawning in an ex situ environment, and nobody has successfully closed the life cycle (i.e., production of an F2 generation) of these corals. Here, for the first time, we closed the life cycle of the broadcast spawning coral Acropora millepora in a fully closed ex situ mesocosm. This breakthrough has numerous implications for our understanding of reproductive biology, specifically it offers potential to deepen our understanding of the genetic influence on adaptive traits such as heat tolerance, growth and disease resistance over multiple generations.
  • Insights into the Cultured Bacterial Fraction of Corals

    Sweet, Michael; Villela, Helena; Keller-Costa, Tina; Costa, Rodrigo; Romano, Stefano; Bourne, David G.; Cárdenas, Anny; Huggett, Megan J.; Kerwin, Allison H.; Kuek, Felicity; et al. (American Society for Microbiology, 2021-06-22)
    Bacteria associated with coral hosts are diverse and abundant, withrecent studies suggesting involvement of these symbionts in host resilience toanthropogenic stress. Despite their putative importance, the work dedicated to cultur-ing coral-associated bacteria has received little attention. Combining published andunpublished data, here we report a comprehensive overview of the diversity and func-tion of culturable bacteria isolated from corals originating from tropical, temperate, andcold-wa ter habitats . A total of 3,055 isolat es from 52 studies were considered by ourmetasurvey. Of these, 1,045 had full-length 16S rRNA gene sequences, spanning 138 for-mally descri bed and 12 putativel y novel bacter ial gener a across the Proteobacteria,Firmicutes, Bacteroidetes,andActinobacteria phyla. We perfor me d compara ti ve genomi canalysis using the available genomes of 74 strains and identied potential signatures ofbenecial bacterium-coral symbioses among the strains. Our analysis revealed .400 bio-synthetic gene clusters that underlie the biosynthesis of antioxidant, antimicrobial, cyto-toxic, and other secondary metabolites. Moreover, we uncovered genomic features—notpreviously described for coral-bacterium symbioses—potentially involved in host coloni-zation and host-symbiont recognition, antiviral defense mechanisms, and/or integratedmetabolic interactions, which we suggest as novel targets for the screening of coralprobiotics. Our results highlight the importance of bacterial cultures to elu cidatecoral holob iont functioning and guide the selection of probiotic candidates to promote coral resilience and improve holistic and customized reef restoration and rehabilitation efforts.
  • A review of the diversity and impact of invasive non-native species in tropical marine ecosystems

    Alidoost Salimi, Parisa; Creed, Joel C.; Esch, Melanie M.; Fenner, Douglas; Jaafar, Zeehan; Levesque, Juan C.; Montgomery, Anthony D.; Alidoost Salimi, Mahsa; Edward, J. K. Patterson; Raj, K. Diraviya; et al. (Springer Science and Business Media LLC, 2021-04-23)
    Tropical marine ecosystems are biologically diverse and economically invaluable. However, they are severely threatened from impacts associated with climate change coupled with localized and regional stressors, such as pollution and overfishing. Non-native species (sometimes referred to as ‘alien’ species) are another major threat facing these ecosystems, although rarely discussed and overshadowed by the other stressors mentioned above. NNS can be introduced accidentally (for example via shipping activities) and/or sometimes intentionally (for aquaculture or by hobbyists). Understanding the extent of the impacts NNS have on native flora and fauna often remains challenging, along with ascertaining when the species in question actually became ‘invasive’. Here we review the status of this threat across key tropical marine ecosystems such as coral reefs, algae meadows, mangroves, and seagrass beds. We aim to provide a baseline of where invasive NNS can be found, when they are thought to have been introduced and what impact they are thought to be having on the native ecosystems they now inhabit. In the appended material we provide a comprehensive list of NNS covering key groups such as macroalgae, sponges, seagrasses and mangroves, anthozoans, bryozoans, ascidians, fishes, and crustaceans.
  • Editorial: Coral Reefs in the Anthropocene – Reflecting on 20 Years of Reef Conservation UK

    Andradi-Brown, Dominic A.; Banaszak, Anastazia T.; Frazer, Thomas K.; Gilchrist, Hannah; Harborne, Alastair R.; Head, Catherine E. I.; Koldewey, Heather J.; Levy, Emma; Richards, Kirsty; Short, Rebecca; et al. (Frontiers Media SA, 2020-06-12)
    Editorial on the Research Topic Coral Reefs in the Anthropocene – Reflecting on 20 Years of Reef Conservation UK.
  • Definitions of biodiversity from urban gardeners

    Norton, Briony, A.; Shang, Bowen; Sheffield, David; Ramsey, Andrew; University of Derby (Oxford University Press, 2021-06-14)
    Living in urban environments can leave people disconnected from nature and less likely to engage with biodiversity conservation. Within urban areas, residential gardens can occupy large proportions of greenspace and provide important habitat for biodiversity. Understanding the views and knowledge of garden owners who have collective responsibility for managing these areas is therefore important. We aimed to understand how urban garden owners understand biodiversity. We surveyed garden owners in Derby, UK, across 20 areas spanning a socioeconomic spectrum. Residents were asked to explain their understanding of ‘biodiversity’ in a short definition format. Responses were classified using thematic and word frequency analyses. Of 255 respondents, approximately one third were unable to provide a definition. From the definitions provided, themes that emerged in frequency order were: variety of species or environments; coexistence of organisms; conservation of nature; a synonym for habitat; and uncommon answers not clearly related to biodiversity. Members of wildlife or gardening charities were more likely than non-members to say they could define biodiversity and to use specific taxonomic terms. We detected no difference between keen and less keen gardeners. These short-form responses captured many themes longer and/or qualitative assessments have identified about people’s understanding of biodiversity and illustrate a diversity and, in some cases, a depth of understanding of the concepts of biodiversity, without necessarily adhering to the formal definition. Given the variety of understanding, at this critical period, technical terms, even common ones, should be used with caution and with an open mind about how people interpret them.
  • Explosive felsic eruptions on ocean islands: a case study from Ascension Island (South Atlantic)

    Preece, Katie; Barclay, Jenni; Brown, Richard J.; Chamberlain, Katy; Mark, Darren F.; Swansea University; University of East Anglia; Durham University; University of Derby; Scottish Universities Environmental Research Centre, East Kilbride; et al. (Elsevier, 2021-05-19)
    Ocean island volcanism is generally considered to be dominated by basaltic eruptions, yet felsic products associated with more hazardous explosive eruptive events are also present in the geological record of many of these islands. Ascension Island, recently recognised as an active volcanic system, exhibits explosive felsic eruption deposits but their age, eruptive styles and stratigraphic association with mafic volcanism are thus far unclear. Here we present a felsic pyroclastic stratigraphy for Ascension Island, supplemented by 26 new 40Ar/39Ar ages and whole rock geochemical XRF data. More than 80 felsic pyroclastic eruptions have occurred over the last ~ 1 Myr, including subplinian and phreatomagmatic eruptions, which produced pumice fall and pyroclastic density current deposits. Detailed sampling suggests felsic events are unevenly distributed in space and time. Subaerial activity can be divided into four Periods: Period 1 (~1000 – 500 ka) felsic and mafic eruptions, with felsic explosive eruptions, linked to a Central Felsic Complex; Period 2 (~ 500 – 100 ka) mafic period; Period 3 (~ 100 – 50 ka) felsic eruptions associated with the Eastern Felsic Complex; Period 4 (< 50 ka) mafic eruptions. The last explosive eruption occurred at ~ 60 ka. This work highlights the cyclical nature of ocean island volcanism and the timescales over which changes between predominantly mafic and felsic volcanism occur. The prevalence of past felsic explosive eruptions on Ascension highlights the need to consider the possibility of future subplinian or phreatomagmatic events in hazard management plans, with any potential risk compounded by Ascension’s small size 41 and remote location.
  • Opinions of small and medium UK construction companies on environmental management systems

    Bailey, Matthew; Booth, Colin A; Horry, Rosemary; Vidalakis, Christos; Mahamadu, Abdul-Majeed; Awuah, Kwasi Gyau Baffour; University of Derby; University of the West of England; University of Salford (Thomas Telford Ltd, 2021-02-16)
    Pressure to reduce the environmental impact of construction activities has increased, such that a paradigm shift is required. This paper presents stakeholder opinions of environmental management systems as a means for the construction industry to respond to these issues. Using a previous approach, the views of small and medium construction companies were sought, using questionnaires to ask respondents to reveal their perceived benefits of and barriers to implementing the ISO 14000 suite of environmental management standards in the UK. Detailed statistical analysis showed that environmental management systems can sometimes produce quantifiable benefits to organisations in terms of cost reduction. However, from a contractor’s view, the greatest benefit was a reduction in environmental impact outweighing financial benefits. Findings also demonstrated numerous barriers to an organisation exist, both internal and external, regarding adoption and use of environmental management systems. The most critical barrier was that cost savings do not always balance with the expense of implementation. Furthermore, waste minimisation at the design stage is viewed as most important. In general, the opinions gauged in this study indicated that short-term profits are normally considered more imperative than long-term gains. Therefore, despite a need to focus on developing strategies for removing or reducing the challenges of environmental management systems, the reality is that they may not be the panacea to sustainable development, as is often touted.
  • Corals as canaries in the coalmine: Towards the incorporation of marine ecosystems into the ‘One Health’ concept

    Sweet, Michael; Burian, Alfred; Bulling, Mark; University of Derby (Elsevier BV, 2021-02-02)
    ‘One World – One Health’ is a developing concept which aims to explicitly incorporate linkages between the environment and human society into wildlife and human health care. Past work in the field has concentrated on aspects of disease, particularly emerging zoonoses, and focused on terrestrial systems. Here, we argue that marine environments are crucial components of the ‘One World – One Health’ framework, and that coral reefs are the epitome of its underlying philosophy. That is, they provide vast contributions to a wide range of ecosystem services with strong and direct links to human well-being. Further, the sensitivity of corals to climate change, and the current emergence of a wide range of diseases, make coral reefs ideal study systems to assess links, impacts, and feedback mechanisms that can affect human and ecosystem health. There are well established protocols for monitoring corals, as well as global networks of coral researchers, but there remain substantial challenges to understanding these complex systems, their health and links to provisioning of ecosystem services. We explore these challenges and conclude with a look at how developing technology offers potential ways of addressing them. We argue that a greater integration of coral reef research into the ‘One World – One Health’ framework will enrich our understanding of the many links within, and between, ecosystems and human society. This will ultimately support the development of measures for improving the health of both humans and the environment.
  • Investing in Blue Natural Capital to Secure a Future for the Red Sea Ecosystems

    Cziesielski, Maha J.; Duarte, Carlos M.; Aalismail, Nojood; Al-Hafedh, Yousef; Anton, Andrea; Baalkhuyur, Faiyah; Baker, Andrew C.; Balke, Thorsten; Baums, Iliana B.; Berumen, Michael; et al. (Frontiers Media SA, 2021-01-15)
    For millennia, coastal and marine ecosystems have adapted and flourished in the Red Sea’s unique environment. Surrounded by deserts on all sides, the Red Sea is subjected to high dust inputs and receives very little freshwater input, and so harbors a high salinity. Coral reefs, seagrass meadows, and mangroves flourish in this environment and provide socio-economic and environmental benefits to the bordering coastlines and countries. Interestingly, while coral reef ecosystems are currently experiencing rapid decline on a global scale, those in the Red Sea appear to be in relatively better shape. That said, they are certainly not immune to the stressors that cause degradation, such as increasing ocean temperature, acidification and pollution. In many regions, ecosystems are already severely deteriorating and are further threatened by increasing population pressure and large coastal development projects. Degradation of these marine habitats will lead to environmental costs, as well as significant economic losses. Therefore, it will result in a missed opportunity for the bordering countries to develop a sustainable blue economy and integrate innovative nature-based solutions. Recognizing that securing the Red Sea ecosystems’ future must occur in synergy with continued social and economic growth, we developed an action plan for the conservation, restoration, and growth of marine environments of the Red Sea. We then investigated the level of resources for financial and economic investment that may incentivize these activities. This study presents a set of commercially viable financial investment strategies, ecological innovations, and sustainable development opportunities, which can, if implemented strategically, help ensure long-term economic benefits while promoting environmental conservation. We make a case for investing in blue natural capital and propose a strategic development model that relies on maintaining the health of natural ecosystems to safeguard the Red Sea’s sustainable development.
  • Species-Specific Variations in the Metabolomic Profiles of Acropora hyacinthus and Acropora millepora Mask Acute Temperature Stress Effects in Adult Coral Colonies

    Sweet, Michael; Bulling, Mark; Varshavi, Dorsa; Lloyd, Gavin R.; Jankevics, Andris; Najdekr, Lukáš; Weber, Ralf J. M.; Viant, Mark R.; Craggs, Jamie; University of Derby; et al. (Frontiers Media SA, 2021-03-25)
    Coral reefs are suffering unprecedented declines in health state on a global scale. Some have suggested that human assisted evolution or assisted gene flow may now be necessary to effectively restore reefs and pre-condition them for future climate change. An understanding of the key metabolic processes in corals, including under stressed conditions, would greatly facilitate the effective application of such interventions. To date, however, there has been little research on corals at this level, particularly regarding studies of the metabolome of Scleractinian corals. Here, the metabolomic profiles [measured using 1H nuclear magnetic resonance spectroscopy (1H NMR) and ultra-high-performance liquid chromatography-mass spectrometry (LC-MS)] of two dominant reef building corals, Acropora hyacinthus and A. millepora, from two distinct geographical locations (Australia and Singapore) were characterized. We assessed how an acute temperature stress (an increase of 3.25°C ± 0.28 from ambient control levels over 8 days), shifted the corals’ baseline metabolomic profiles. Regardless of the profiling method utilized, metabolomic signatures of coral colonies were significantly distinct between coral species, a result supporting previous work. However, this strong species-specific metabolomic signature appeared to mask any changes resulting from the acute heat stress. On closer examination, we were able to discriminate between control and temperature stressed groups using a partial least squares discriminant analysis classification model (PLSDA). However, in all cases “late” components needed to be selected (i.e., 7 and 8 instead of 1 and 2), suggesting any treatment effect was small, relative to other sources of variation. This highlights the importance of pre-characterizing the coral colony metabolomes, and of factoring that knowledge into any experimental design that seeks to understand the apparently subtle metabolic effects of acute heat stress on adult corals. Further research is therefore needed to decouple these apparent individual and species-level metabolomic responses to climate change in corals.
  • Going with the flow: How corals in high‐flow environments can beat the heat

    Fifer, James; Bentlage, Bastian; Lemer, Sarah; Fujimura, Atsushi G.; Sweet, Michael; Raymundo, Laurie J.; University of Guam Marine Laboratory, UOG Station, Mangilao, GU, USA; Boston University, Boston, MA, USA; University of Derby (Wiley, 2021-03-02)
    Coral reefs are experiencing unprecedented declines in health on a global scale leading to severe reductions in coral cover. One major cause of this decline is increasing sea surface temperature. However, conspecific colonies separated by even small spatial distances appear to show varying responses to this global stressor. One factor contributing to differential responses to heat stress is variability in the coral's micro‐environment, such as the amount of water flow a coral experiences. High flow provides corals with a variety of health benefits, including heat stress mitigation. Here, we investigate how water flow affects coral gene expression and provides resilience to increasing temperatures. We examined host and photosymbiont gene expression of Acropora cf. pulchra colonies in discrete in situ flow environments during a natural bleaching event. In addition, we conducted controlled ex situ tank experiments where we exposed A. cf. pulchra to different flow regimes and acute heat stress. Notably, we observed distinct flow‐driven transcriptomic signatures related to energy expenditure, growth, heterotrophy and a healthy coral host–photosymbiont relationship. We also observed disparate transcriptomic responses during bleaching recovery between the high‐ and low‐flow sites. Additionally, corals exposed to high flow showed “frontloading” of specific heat‐stress‐related genes such as heat shock proteins, antioxidant enzymes, genes involved in apoptosis regulation, innate immunity and cell adhesion. We posit that frontloading is a result of increased oxidative metabolism generated by the increased water movement. Gene frontloading may at least partially explain the observation that colonies in high‐flow environments show higher survival and/or faster recovery in response to bleaching events.
  • Improving the reliability of eDNA data interpretation

    Burian, Alfred; Mauvisseau, Quentin; Bulling, Mark; Domisch, Sami; Qian, Song; Sweet, Michael; University of Derby; Marine Ecology Department, Lurio University, Nampula, Mozambique; Helmholtz Centre for Environmental Research, Leipzig, Germany; Natural History Museum, University of Oslo, Oslo, Norway; et al. (Wiley, 2021-03-25)
    Global declines in biodiversity highlight the need to effectively monitor the density and distribution of threatened species. In recent years, molecular survey methods detecting DNA released by target‐species into their environment (eDNA) have been rapidly on the rise. Despite providing new, cost‐effective tools for conservation, eDNA‐based methods are prone to errors. Best field and laboratory practices can mitigate some, but the risks of errors cannot be eliminated and need to be accounted for. Here, we synthesize recent advances in data processing tools that increase the reliability of interpretations drawn from eDNA data. We review advances in occupancy models to consider spatial data‐structures and simultaneously assess rates of false positive and negative results. Further, we introduce process‐based models and the integration of metabarcoding data as complementing approaches to increase the reliability of target‐species assessments. These tools will be most effective when capitalizing on multi‐source data sets collating eDNA with classical survey and citizen‐science approaches, paving the way for more robust decision‐making processes in conservation planning.
  • Mapping a super-invader in a biodiversity hotspot, an eDNA-based success story

    Baudry, Thomas; Mauvisseau, Quentin; Goût, Jean-Pierre; Arqué, Alexandre; Delaunay, Carine; Smith-Ravin, Juliette; Sweet, Michael; Grandjean, Frédéric; Route de la Pointe de Jaham - BP7212, Schoelcher 97274, Martinique, France; Fort-de-France, Martinique, France; et al. (Elsevier BV, 2021-04-02)
    The lesser Antilles archipelago in the Caribbean is known as a biodiversity hotspot, hosting many endemic species. However, recent introduction of a highly invasive species, the Australian redclaw crayfish (Cherax quadricarinatus), has led to significant threats to this fragile ecosystem. Here we developed, validated, and optimized a species-specific eDNA-based detection protocol targeting the 16S region of the mitochondrial gene of C. quadricarinatus. Our aim was to assess the crayfish distribution across Martinique Island. Our developed assay was species-specific and showed high sensitivity in laboratory, mesocosm and field conditions. A significant and positive correlation was found between species biomass, detection probability and efficiency through mesocosm experiments. Moreover, we found eDNA persisted up to 23 days in tropical freshwaters. We investigated a total of 83 locations, spread over 53 rivers and two closed water basins using our novel eDNA assay and traditional trapping, the latter, undertaken to confirm the reliability of the molecular-based detection method. Overall, we detected C. quadricarinatus at 47 locations using eDNA and 28 using traditional trapping, all positive trapping sites were positive for eDNA. We found that eDNA-based monitoring was less time-consuming and less influenced by the crayfishes often patchy distributions, proving a more reliable tool for future large-scale surveys. The clear threat and worrying distribution of this invasive species is particularly alarming as the archipelago belongs to one of the 25 identified biodiversity hotspots on Earth.
  • The importance of Forest School and the pathways to nature connection

    Cudworth, Dave; Lumber, Ryan; DeMontfort University; University of Derby (Springer Science and Business Media LLC, 2021-02-18)
    Over the past 25 years Forest School in the UK has been growing in popularity as part of a wider resurgence of interest in outdoor learning. A key driver behind this recurrence of interest has been a growing concern over the lack of child exposure to outdoor experiences and with the natural world and their ensuing nature-deficit disorder. This article considers Forest School as linked with the concept of nature connection that is the sensation of belonging to a wider natural community. This sense of belonging developed by being in nature can also be a key factor in promoting attachment and sense of place which in turn is associated with the promotion of health, wellbeing and pro-environmental behaviours. As such the origins towards achieving nature connection are a formal part of the Forest School Association’s (FSA 2016). Forest School principals, with growing research linking Forest School and nature connection as concomitant. Recent work has suggested that contact, emotion, meaning, compassion, and beauty are key pathways for the formation of nature connection and there is a strong need to better understand children’s nature connection in this context. Further, from the premise that what goes on in spaces and places is fundamentally linked to both social and spatial processes, this article also attempts to understand the spatialities of Forest School in order to frame the development of nature connection within a socio-spatial analytic.
  • Oxygen consumption during digestion in Anodonta anatina and Unio pictorum in response to algal concentration

    Zapitis, Charitos; Huck, Maren; Ramsey, Andrew; University of Derby (Springer, 2021-03-16)
    Abstract The metabolic activity of unionid mussels influences the oxygen fluxes and other physical and chemical characteristics in aquatic systems. Unionid oxygen consumption rate during digestion and its dependency on food availability is understudied. In laboratory conditions, we quantified the oxygen consumption rate of Anodonta anatina and Unio pictorum in response to algal concentration—0.05, 6.0 and 12.0 mg of Ash Free Dry Mass of Chlorella vulgaris L-1 —and mussel dry soft-tissue mass at 19 ± 1C. Following a 5-h feeding-period, the oxygen consumption rate (mg O2 h-1 ) increased with algal concentration and mussel dry mass in both species during a 2-h digestion-period. The mean oxygen consumption per gram of dry mass (mg O2 gDM-1 h-1 ) increased with the algal concentration in both species. The oxygen consumption rate of A. anatina was significantly greater than that of U. pictorum at a given algal concentration. The A. anatina oxygen consumption per gram of dry mass decreased with increasing dry mass. Oxygen consumption rate during digestion shows inter-specific differences and is dependent on food availability. The findings inform the species specific quantification of oxygen consumption, and validation is required in in situ conditions.
  • Dental microwear texture analysis as a tool for dietary discrimination in elasmobranchs

    McLennan, Laura J.; Purnell, Mark A.; University of Leicester; University of Derby (Springer Science and Business Media LLC, 2021-01-28)
    As abundant and widespread predators, elasmobranchs play influential roles in food-web dynamics of marine communities. Clearly, these trophic interactions have significant implications for fisheries management and marine conservation, yet elasmobranch diet is relatively understudied; for the majority of species little or no quantitative dietary data exist. This reflects the difficulties of direct observation of feeding and stomach contents analysis in wild elasmobranchs. Here, by quantifying the 3D surface textures that develop on tooth surfaces as a consequence of feeding, we show that tooth microwear varies with diet in elasmobranchs, providing a new tool for dietary analysis. The technique can be applied to small samples and individuals with no gut contents, and thus offers a way to reduce the impact on wild elasmobranch populations of analysing their dietary ecology, especially relevant in conservation of endangered species. Furthermore, because microwear accumulates over longer periods of time, analysis of texture overcomes the ‘snapshot bias’ of stomach contents analysis. Microwear texture analysis has the potential to be a powerful tool, complementing existing techniques such as stable isotope analysis, for dietary analysis in living and extinct elasmobranchs.

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