The Department of Biological Sciences has an expanding research base, which, in addition to providing leading researchers of national and international standing in these areas, most importantly underpins the delivery of teaching. Research in Biological Sciences at Chester can be divided into three broad groups of expertise, namely Animal Behaviour and Conservation, Food Nutrition and Health, and Stress and Disease.

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  • Ida Slater: A Collection Researcher in a Male World at the Beginning of the 20th Century

    Burek, Cynthia V.; Sendino, Consuelo; Ducker, Erik; University of Chester, Natural Hisotry Museum, University College London
    'Ida Lilian Slater (1881-1969) was one of the first women to work as a geologist in a male w·orld, and although her career was short, she made important contributions to the Early Palaeozoic of Wales and Scotland. Her main work was based on a col lection of a group of fossil scyphozoan polyps gathered not by her but by another significant woman, Elizabeth Anderson , widely known as Mrs. Robert Gray (1831-1924). The majority of this col lection is kept at the Natural History Museum (NHM), London, and the Sedgwick Museum, Cambridge. She worked in the former one for two years describing species and comparing specimens for her monograph on British conulariids. Although her work was based not only on this group, she will be remembered by her important contribution to the conulariids through collections. The NHM collection is considered the best in the world in terms of diversity and the second best in its number of specimens, while the Sedgwick Museum has a smal ler co llection that is still considered the second best in diversity and number of specimens in the United l<ingdom. Her work has been cited for more than 100 years and continues to be cited to this day by researchers on this group of fossi ls.
  • Maria Ogilvie Gordon

    Burek, Cynthia V; University of Chester
    A biographical dictionary entry for Maria Ogilvie Gordon
  • Geodiversity Action Plans – A method to facilitate, structure, inform and record action for geodiversity

    Burek, Cynthia V; Dunlop, Lesley; Larwood, Jonathan G; University of Chester; Northumbria University; Natural England
    Geodiversity Action Plans are used widely within the United Kingdom to inform and record action for geodiversity and geoconservation. They encompass both site-based audit and conservation with a wider perspective on geodiversity resources available in an agreed area (such as geological sites, museum collections and building stones) with ambitions to present and communicate, influence policy and practice, and to secure resources in relation to geodiversity. Geodiversity Action Plans (GAPs) are used particularly at local and company level to focus and highlight the work needed to be carried out and a as key mechanism to facilitate and support the delivery of the overarching UK Geodiversity Action Plan (UKGAP). Importantly, GAPs cross cut interests and are multidisciplinary. Although they are mainly a UK tool for geoconservation the principles and approach are easily transferred and could be duplicated in other countries.
  • The contribution of women to Welsh geological research and education up to 1920

    Burek, Cynthia V; University of Chester
    The importance of Welsh geology to the development of the science of geology and the stratigraphic column is underestimated and indeed the contribution of women to this process is largely overlooked. This paper explores the scientific contribution and the role that women played to the investigation of Welsh stratigraphy. The work of Gertrude Elles, Ethel Skeat, Ethel Wood and Margaret Crosfield, the socalled Newnham quartet of palaeontologists, and the educational contribution of Dilys Davies, the first female to study geology at Newnham College, Cambridge and of Annie Greenly to the work of her husband Edward Greenly on Anglesey is discussed. Catherine Raisin also contributed work on the metamorphic rocks of Wales and her work is examined. Without their contributions, Welsh stratigraphy would not be as advanced as it is today especially in the use of graptolite identification for correlation. However, scientific research was not the only contribution and other roles such as illustrators, proof readers, field assistants and teachers will also be examined against the background of the time. The fact that there were few higher education institutions in Wales at the time admitting women to geology is a significant factor for geological research. The contribution of female researchers to this research development is largely forgotten by both researchers, educators and the general public. This paper hopes to rectify these omissions.
  • Female medal and fund recipients of the Geological Society of London: a historical perspective.

    Burek, Cynthia V.; University of Chester
    The Geological Society of London has historically awarded medals and funds to early career geologists and for career achievement recognition. Mid-career and outreach awards were later added as categories. This paper will concentrate on early recipients of Funds and Medal winners mainly during the 19th and 20th centuries. In the 19th century, only two women received recognition by the Geological Society for their work through early career funds (not medals): Catherine Raisin in 1893 and Jane Donald in 1898. From 1900-1919, no woman received a medal, but funds were collected by men on behalf of Gertrude Elles, Elizabeth Gray, Ethel Wood, Helen Drew, Ida Slater and Ethel Skeat. The first woman to collect her own Fund was Ethel Skeat in 1908. Pre-WWII only four women received career recognition in the form of a medal. Gertrude Elles in 1919 and Ethel Shakespear in 1920 received the Murchison Medal. No further medals were awarded to women until Maria Ogilvie Gordon in 1932 and Eleanor Mary Reid in 1936. It was not until the end of the 1990s and into the 21st century that a significant number of women received medals. It is noted that the William Smith Medal was only received by a woman in 2019 and the Dewey Medal has yet to be received by a woman. An analysis of the different medals and funds awarded to females through the Geological Society is discussed in detail with snapshots of the women who were so recognised. As we move into the 21st century we see an increase in these awards to women. The awarding of a professional Society medal or fund is an honour given to few academics, experts or publicly minded individuals. It is a public acknowledgement of an achievement, often coming with financial benefit and can be regarded as peer recognition of a significant contribution to society either through research or outreach activities. During the 19th century, awarding this recognition to a female was unusual. The Geological Society of London began its life in 1807 (Herries-Davies 2007) and since 1831, when the Wollaston Medal and Funds were first awarded, it has awarded 1423 medals and funds to date (January 2020). Of these, 110 recipients were women (7.7%), representing 5.3% of medal and 10.8% of fund winners. However, these percentages have dramatically changed over time (Fig. 1). A larger number of awards were given to women in the first 18 years of the 21st century than the previous two centuries together. The disparity between genders is shown in Figure 2, and the length of time before the first medal or fund was awarded to a female is shown in Figure 3. The only woman to have been awarded two medals is Janet Watson (1923-1985), the Lyell Medal in 1973 and the Bigsby Medal in 1965. Twelve women have received both a fund and medal: Catherine Raisin (1855-1945), Gertrude Elles (1872-1960), Ethel Wood (Dame Shakespear) (1871-1945), Eileen Mary Lind Hendriks (1888-1978), Eleanor Reid (1860–1953), Helen Muir-Wood (1895-1968) , Marjorie Chandler (1897–1983), Dorothy Hill (1907-1997), Dorothy Rayner (1912-2003), Mabel Tomlinson (1893-1978), Dianne Edwards (1942- ) and Jane Plant (1945-2016). Several of these women have individual chapters devoted to them within this volume of research and so will not be discussed in detail here. This paper will concentrate on the early years and first recipients of medal and fund awards to women, and, although mention will be made of the success of the 21st century for clarity and completion, it is not the main aim of this paper.
  • Mabel Elizabeth Tomlinson and Isabel Ellie Knaggs: two overlooked early female Fellows of the Geological Society

    Burek, Cynthia V; University of Chester
    Abstract: The first female Fellows of the Geological Society of London were elected in May 1919. Brief biographies were documented by Burek in 2009 as part of the celebrations for the bicentenary of the Geological Society. While some of those women were well known (e.g. Gertrude Elles and Ethel Wood), others had seemingly been forgotten. In the decade since that publication, information has come to light about those we knew so little about. There are, however, still some details evading research. From 1919 until 1925, 33 women were elected FGS, including Isobel Ellie Knaggs (1922) and Mabel Tomlinson (1924). Mabel Tomlinson had two careers, and is remembered both as an extraordinary teacher and a Pleistocene geologist. She was awarded the Lyell Fund in 1937 and R.H. Worth Prize in 1961, one of only 13 women to have received two awards from the Geological Society. She inspired the educational Tomlinson–Brown Trust. Isabel Knaggs was born in South Africa and died in Australia but spent all her school, university and working years in England. She made significant contributions to crystallography, working with eminent crystallography scientists but remained a lifelong FGS. The achievements of Tomlinson and Knaggs are considerable, which makes their relative present-day obscurity rather puzzling.
  • Gertrude Elles: The pioneering graptolite geologist in a woolly hat. Her career, her achievements and personal reflections of her family and colleagues

    Burek, Cynthia V; Tubb, Jane; University of Chester; Open University
    Gertrude Elles gained worldwide renown for her seminal work with Ethel Wood on ‘A Monograph of British Graptolites’ which is still used today. She gained the MBE, pioneered female geological education, became the first female reader in Cambridge University and one of the first tranche of female Fellows of the Geological Society in 1919. An eccentric with a vast array of hats, PhD students and lodgers, she was a stalwart member of the Sedgwick Club and life member of the British Federation of University Women. She wrote obituaries for colleagues describing their achievements with humour and good nature. Her family describe her as ‘a fabulous woman’ with a huge range of interests including archaeology, botany and music. She related her geological and botanical knowledge in showing a nephew that plants growing along the Moine Thrust reflected change in the underlying rocks. Cambridge colleagues recall her as a ‘marvellous and well-respected figure’ who caused some amusement by her big old cluttered table from which she swept away material making room for new samples (and work for technicians). She died in 1960 in her beloved Scotland. However, her legacy survives in the classification of a group of fossils extinct for nearly 400 million years. The well documented career and achievements of Gertrude Elles (Burek 2002, 2007, 2009, 2014, Creese 1994, 2004) establish her as a great geologist who was ahead of her time and had an enduring love of the outdoors, particularly the Scottish Highlands. Her outstanding contribution to the field of palaeontology was ‘A Monograph of British Graptolites’ which she co-authored with Ethel Wood and which is still widely used today. She was also an inspirational lecturer, always remembered for her enthusiasm and as an advocate for women’s education and advancement. From several personal accounts, she was identified as an amazing, slightly eccentric person with wide ranging interests and knowledge. Her family called her G and speak of her with pride. ACCEPTED MANUSCRIPT Downloaded from http://sp.lyellcollection.org/ by guest on October 27, 2020 Cambridge colleagues called her Gertie (but not to her face!) and remember her with affection, respect and some amusement. The ‘woolly hat’ in the title refers to one of the best-known photos of her (Fig.1), and because she had a vast array of hats. The reason for this collection was her appointment in the department in Cambridge, which required women to wear hats when lecturing (Burek 2007).
  • Margaret Chorley Crosfield, FGS: the very first female Q1 Fellow of the Geological Society

    Burek, Cynthia V.; University of Chester
    In May 1919 the first female Fellows of the Geological Society were elected and from then on attended meetings at the Society. The first person on the female fellows’ list was Margaret Chorley Crosfield. She was born in 1859 and died in 1952. She lived all her life in Reigate in Surrey. After studying and then leaving Cambridge, Margaret had sought to join the Geological Society of London for many years, in order to gain recognition of her research work, but also to attend meetings and use the library. This paper will look at her history and trace her geological achievements in both stratigraphy and palaeontology, as well as her extraordinary field notebooks that she left to the Geological Survey. She worked closely with two female geological colleagues, Mary Johnston and Ethel Skeat. Margaret Crosfield epitomizes the educated, amateur, independent woman who wanted to be recognized for her work, especially fieldwork, at a time when female contributions, especially in the field sciences, were not always acknowledged or even appreciated.
  • Celebration of the Centenary of the first female Fellows: Introduction

    Burek, Cynthia V.; Higgs, Bettie M; University of Chester, University College Cork
    Abstract The Geological Society of London was founded in 1807. In May 1919, the first female Fellows were elected to the Society, 112 years after its foundation. This Special Publication celebrates this centenary Eighteen papers have been gathered to highlight recent research, carried out by 24 authors. The publication also builds on stories introduced in a previous Special Publication of the Geological Society, The Role of Women in the History of Geology edited by Burek & Higgs in 2007, the first book to deal solely with this topic, and Burek (2009). It fills in some of the gaps in knowledge with detail that has only recently been uncovered, leading to more in-depth analysis and reporting. The current publication includes more examples from the 20th century, and a small number into the present century, allowing some trends to be identified. The collective work is finding connections previously undocumented and in danger of being lost forever due to the age of the interviewees. The same work also identifies several common challenges that female geoscientists faced, which are still evident in the current investigations. By building on what went before, filling gaps in knowledge and enriching the histories, interesting nuanced insights have emerged.
  • Zoo-housed mammals do not avoid giving birth on weekends

    Hosey, Geoff; Ward, Samantha J; Ferguson, Amanda; Jenkins, Hannah; Hill, Sonya P; University of Bolton; Nottingham Trent University; ZSL London Zoo; North of England Zoological Society; University of Chester
    There is evidence that zoo visitor presence can influence the behavior and, in some cases, adrenal response of zoo animals, and can sometimes compromise animal welfare. In some laboratory studies, significantly more primate births have been reported on weekends, when fewer people are working there, compared with weekdays when staffing levels are at their highest. Here we investigate whether there is evidence of a “weekend effect” on births in zoo animals as a result of visitor numbers. Unlike laboratories, zoos are typically busier with visitors on weekends than on weekdays, although staffing levels remain fairly consistent across days of the week. If zoo animal parturition is sensitive to human presence, then fewer births would be expected on weekends compared with weekdays. We tested this using birth data and visitor numbers on the entrance gate from zoo records across 16 species representing artiodactyls, perissodactyls, carnivores and primates at four British zoos, to see whether there is an association between mean daily birth rates and average visitor numbers. We predict that, if there is a visitor effect, daily births should be lower on weekends than weekdays and should correlate with mean daily visitor numbers. Results showed that births for all 16 species were randomly distributed through the week, and there was no significant decline in births on weekends. We conclude that the ‘weekend effect’, if such a thing exists, does not appear to be a feature of zoo births, suggesting that elevated weekend visitor numbers are not sufficiently stressful to trigger delayed parturition.
  • Margaret Chorley Crosfield, FGS: the very first female Fellow of the Geological Society

    Burek, C. V.; orcid: 0000-0002-7931-578X (Geological Society of London, 2020-07-10)
    AbstractIn May 1919 the first female Fellows of the Geological Society were elected and from then on attended meetings at the Society. The first person on the female fellows’ list was Margaret Chorley Crosfield. She was born in 1859 and died in 1952. She lived all her life in Reigate in Surrey. After studying and then leaving Cambridge, Margaret had sought to join the Geological Society of London for many years, in order to gain recognition of her research work, but also to attend meetings and use the library. This paper will look at her history and trace her geological achievements in both stratigraphy and palaeontology, as well as her extraordinary field notebooks that she left to the Geological Survey. She worked closely with two female geological colleagues, Mary Johnston and Ethel Skeat. Margaret Crosfield epitomizes the educated, amateur, independent woman who wanted to be recognized for her work, especially fieldwork, at a time when female contributions, especially in the field sciences, were not always acknowledged or even appreciated.
  • Effects of a no-take reserve on mangrove fish assemblages: incorporating seascape connectivity

    Marley, GSA; Deacon, AE; Phillip, DAT; Lawrence, AJ (Inter-Research Science Center, 2020-09-10)
    No-take reserves (NTRs) have been effective at conserving fish assemblages in tropical systems such as coral reefs, but have rarely been evaluated in turbid tropical estuaries. The present study evaluated the effect of a mangrove NTR on the conservation of juvenile fish abundance, commercial fish biomass and biodiversity at the assemblage level, and the abundance of juveniles, target and non-target adults at the family level. The evaluation incorporated one aspect of seascape connectivity, namely proximity to the sea, or in this case, the Gulf of Paria. Linear mixed models showed that the NTR had a positive effect only on species richness at the assemblage level. However, juvenile fish abundance, commercial fish biomass, taxonomic distinctness and functional diversity were not enhanced in the NTR. The inclusion of connectivity in these models still failed to identify any positive effects of the NTR at the assemblage level. Yet, there were significant benefits to juvenile fish abundance for 5 of 7 families, and for 1 family of non-target adults. Possible explanations for the limited success of the NTR for fish assemblages include failing to account for the ecology of fish species in NTR design, the drawbacks of ‘inside-outside’ (of the NTR) experimental designs and the fact that fishing does not always impact non-target species. It is important to recognise that mangrove NTRs do not necessarily benefit fish assemblages as a whole, but that finer-scale assessments of specific families may reveal some of the proclaimed benefits of NTRs in tropical estuaries.
  • Seascape genomics reveals population isolation in the reef-building honeycomb worm, Sabellaria alveolata (L.)

    Dubois, Stanislas; Muir, Anna P; orcid: 0000-0002-6896-6915; Ross, Rebecca; Firth, Louise; Knights, Antony; Lima, Fernando; Seabra, Rui; Corre, Erwan; Le Corguillé, Gildas; Nunes, Flavia; et al.
    Background: Under the threat of climate change populations can disperse, acclimatise or evolve in order to avoid fitness loss. In light of this, it is important to understand neutral gene flow patterns as a measure of dispersal potential, but also adaptive genetic variation as a measure of evolutionary potential. In order to assess genetic variation and how this relates to environment in the honeycomb worm (Sabellaria alveolata (L.)), a reef-building polychaete that supports high biodiversity, we carried out RAD sequencing using individuals from along its complete latitudinal range. Patterns of neutral population genetic structure were compared to larval dispersal as predicted by ocean circulation modelling, and outlier analyses and genotype-environment association tests were used to attempt to identify loci under selection in relation to local temperature data. Results: We genotyped 482 filtered SNPs, from 68 individuals across nine sites, 27 of which were identified as outliers using BAYESCAN and ARLEQUIN. All outlier loci were potentially under balancing selection, despite previous evidence of local adaptation in the system. Limited gene flow was observed among reef-sites (FST = 0.28 ± 0.10), in line with the low dispersal potential identified by the larval dispersal models. The North Atlantic reef emerged as a distinct population and this was linked to high local larval retention and the effect of the North Atlantic Current on dispersal. Conclusions: As an isolated population, with limited potential for natural genetic or demographic augmentation from other reefs, the North Atlantic site warrants conservation attention in order to preserve not only this species, but above all the crucial functional ecological roles that are associated with their bioconstructions. Our study highlights the utility of using seascape genomics to identify populations of conservation concern.
  • Social Experience of Captive Livingstone’s Fruit Bats (Pteropus livingstonii)

    Stanley, Christina R; Smith, Tessa; Welch, Morgan J; Hosie, Charlotte; Wormell, Dominic; Price, Eluned; University of Chester; Jersey Zoo (MDPI, 2020-07-30)
    Social network analysis has been highlighted as a powerful tool to enhance the evidence-based management of captive-housed species through its ability to quantify the social experience of individuals. We apply this technique to explore the social structure and social roles of 50 Livingstone’s fruit bats (Pteropus livingstonii) housed at Jersey Zoo, Channel Islands, through the observation of associative, affiliative, and aggressive interactions over two data collection periods. We implement binomial mixture modelling and characteristic-based assortment quantification to describe the complexity and organisation of social networks, as well as a multiple regression quadratic assignment procedural (MRQAP) test to analyse the relationship between network types. We examine the effects of individual characteristics (i.e., sex, age, and dominance rank) on social role by fitting models to explain the magnitude of node metrics. Additionally, we utilize a quadratic assignment procedural (QAP) test to assess the temporal stability of social roles over two seasons. Our results indicate that P. livingstonii display a non-random network structure. Observed social networks are positively assorted by age, as well as dominance rank. The frequency of association between individuals correlates with a higher frequency of behavioural interactions, both affiliative and aggressive. Individual social roles remain consistent over ten months. We recommend that, to improve welfare and captive breeding success, relationships between individuals of similar ages and dominance levels should be allowed to persist in this group where possible, and separating individuals that interact frequently in an affiliative context should be avoided.
  • White-faced Darter distribution is associated with coniferous forests in Great Britain

    Geary, Matthew; von Hardenberg, Achaz; Conservation Biology Research Group, Department of Biological Science, University of Chester, Chester, CH1 4BJ
    Abstract 1) Understanding of dragonfly distributions is often geographically comprehensive but less so in ecological terms. 2) White-faced darter (Leucorhinnia dubia) is a lowland peatbog specialist dragonfly which has experienced population declines in Great Britain. White-faced darter are thought to rely on peat-rich pool complexes within woodland but this has not yet been empirically tested. 3) We used dragonfly recording data collected by volunteers of the British Dragonfly Society from 2005 to 2018 to model habitat preference for white-faced darter using species distribution models across Great Britain and, with a more detailed landcover dataset, specifically in the North of Scotland. 4) Across the whole of Great Britain our models used the proportion of coniferous forest within 1km as the most important predictor of habitat suitability but were not able to predict all current populations in England. 5) In the North of Scotland our models were more successful and suggest that habitats characterised by native coniferous forest and areas high potential evapotranspiration represent the most suitable habitat for white-faced darter. 6) We recommend that future white-faced darter monitoring should be expanded to include areas currently poorly surveyed but with high suitability in the North of Scotland. 7) Our results also suggest that white-faced darter management should concentrate on maintaining Sphagnum rich pool complexes and the maintenance and restoration of native forests in which these pool complexes occur.
  • Open Carboniferous Limestone pavement grike microclimates in Great Britain and Ireland: understanding the present to inform the future

    Burek, Cynthia; Hosie, Lottie; Geary, Matt; York, Peter, J. (University of ChesterUniversity of Chester, 2020-04)
    Limestone pavements are a distinctive and irreplaceable geodiversity feature, in which are found crevices known as grikes. These grikes provide a distinct microclimate conferring a more stable temperature, higher relative humidity, lower light intensity and lower air speed than can be found in the regional climate. This stability of microclimate has resulted in an equally distinctive community of flora and fauna, adapted to a forest floor but found in an often otherwise barren landscape. This thesis documents the long-term study of the properties of the limestone pavement grike in order to identify the extent to which the microclimate may sustain its distinctive biodiversity, to provide recommendations for future research which may lead to more effective management. Over a five-year study, recordings of temperature, relative humidity, light intensity and samples of invertebrate biodiversity were collected from five limestone pavements situated in the Yorkshire Dales and Cumbria in Great Britain, and The Burren in the Republic of Ireland. An extensive description of the grike microclimate was undertaken using the data collected to understand the extent of the microclimate stability of the grike and the conditions for variation in the grike microclimate. Further insights into the grike microclimate were gained through simulation techniques more commonly used in engineering, to explore the effects of air flowing over a grike, the light from the sun entering the grike and regression analysis to simulate the temperature within the grike in the present and projected for the future. This study has indicated that although the whole of the grike confers a degree of microclimatic stability, it is made up of a less stable upper zone and a more stable lower zone. The instability of the upper zone is hypothesised to result from the extent to which the majority of light and external air can enter the grike, whereas the stability of the lower zone may be governed by the thermal stability of the limestone surrounding it. Based on this zonation and the projections for the grike temperature, it is hypothesised that climate change will have the most substantial effects in the upper grike zone where species obligated to this area could be most heavily impacted. This study recommends a range of areas in which research may be employed so that the limestone pavement habitat may be successfully managed in Great Britain and the Republic of Ireland.
  • The importance of long-term genetic monitoring of reintroduced populations: inbreeding in the natterjack toad (Epidalea calamita)

    Muir, Anna P.; Phillips, Susanna; Geary, Matt; Allmark, Matthew; Bennett, Sarah; Norman, Kim; Ball, Rachel J; Peters, Catherine; University of Chester; Cheshire Wildlife Trust; Eni UK Ltd (British Herpetological Society, 2020-07-31)
    Genetic monitoring is an important, but frequently lacking, component of management actions to support long-term persistence in reintroduced populations. Populations that remain small, due to demographic processes and genetic diversity, are more likely to experience a second extinction event. The natterjack toad (Epidelea calamita) is legally protected in Britain and was the subject of a reintroduction programme in the 1990s. However, subsequent genetic assessment has been mostly lacking. The aim of this study was to assess the genetic diversity of two reintroduced populations of natterjack toads in order to inform conservation management. Adults were sampled and nine microsatellites amplified to assess neutral genetic variation within each site and for comparison with the source population. Inbreeding was observed at the reintroduction sites, as evidenced by high FIS values (0.43 and 0.72), low observed compared to expected heterozygosities, and significant deviation from Hardy-Weinberg equilibrium. Observed heterozygosity is currently lower in the reintroduction sites than it was in the source population at the time of the reintroductions (Red Rocks: 0.15±0.20; Talacre: 0.12±0.20; Ainsdale (source): 0.29). Evidence for a bottleneck was not found, although this is likely a result of sampling overlapping generations. No within-site population structuring was observed. Such low genetic diversity has not previously been recorded in any natterjack population. Genetic rescue, combined with pool creation, is the most viable option for safeguarding the species at these sites into the future. Our work highlights the importance of ongoing genetic monitoring, in collaboration with conservation organisations, to support conservation management.
  • Patterns in island endemic forest-dependent bird research: the Caribbean as a case-study

    Devenish-Nelson, Eleanor S.; orcid: 0000-0002-9029-4772; email: ellie.devenish@ed.ac.uk; Weidemann, Douglas; Townsend, Jason; Nelson, Howard P. (Springer Netherlands, 2019-05-04)
    Abstract: Unequal patterns in research effort can result in inaccurate assessments of species extinction risk or ineffective management. A group of notable conservation concern are tropical island endemic birds, many of which are also forest-dependent, which increases their vulnerability to extinction. Yet, island bird species have received limited research attention compared to their continental congeners, despite this taxon being globally regarded as well-studied. We used the insular Caribbean, a globally important endemism hotspot with high rates of deforestation, to explore research bias of island and regional endemic forest-dependent birds. A review of the published literature (n = 992) found no significant increase in the number of studies over the search period. Research effort was significantly higher among species with threatened status, long generation time, wide habitat breadth and low to intermediate elevational distributions. Among family groups, the Psittacidae received the highest research effort, while the Cuculidae were the most underrepresented family (30-fold higher and six-fold less than expected, respectively). We found geographic biases in effort, with Jamaica having six-fold less and Puerto Rico eight times more research than expected for their level of endemism. These patterns likely reflect individual interests and limited capacity and funding, typical of Small Island Developing States. With over 50% of species in this review having declining population trends, we recommend prioritizing research that emphasises conservation- and management-relevant data across underrepresented families and islands, by fostering greater collaboration between researchers, practitioners and the existing local amateur ornithological community.
  • The Functionality of “Ogi” – a fermented cereal gruel made in Nigeria, in the Management of Gastrointestinal Disease

    Pickles, Neil; Weili, Li; Olayanju, Adetokunbo T (University of ChesterUniversity of Chester, 2019-04)
    Fermentation is an ancient food processing technique which has over the years had significant impact on food availability, production, economy and health. Fermented corn, ‘ogi’, is a popular meal in South and West African countries and is also traditionally administered to people, especially children, during the incidence of diarrhoea as it is believed to enhance gut health. Various authors have supported the advantageous health functions of fermented corn but have focussed on the possible health benefits that may be derived from the action of the fermentation organisms by investigating their probiotic potentials. Furthermore, in vivo studies have investigated effective functionality of fermented foods and where studies have suggested positive effect of the fermented food intervention, the component of the complex food matrix that may be responsible is often unknown. Though hypothesised, there has been little information on the possible effects of the end products of the fermentation on gut health. Therefore, this thesis aimed to explore the functionality potentials for ‘ogi’, to enhance gut health by investigating the mechanisms through which it may be able to confer the health benefits when consumed. An independent meta-analysis was undertaken to explore and review the analysis of the effectiveness of fermented foods to significantly reduce the duration of diarrhoea. The first experimental study was a comparison between spontaneously fermented vs controlled method of ‘ogi’ production with the aim to explore the possibility of achieving similar end products. The probiotic potential of fermentation organisms and antimicrobial effect of fermentation organisms against E. coli were also investigated. Colonic short chain fatty acids (SCFAs) are known to enhance immune function in the gut. The second experimental study explored the production of SCFAs in fermented corn with the theory that fermented corn may be a dietary source of SCFA and may produce a comparable effect in the gut as the colonic SCFA. It is established that one of the functions of endogenously synthesised nitric oxide (NO) in the body is to enhance immune functions. Therefore, the potential for ‘ogi’ to enhance immune response in the gut by being a dietary source of Nitric Oxide (NO) was explored in the third experimental study. The outcomes of this thesis suggest that it may not be possible to mimic the exact spontaneous fermentation process in a controlled setting. Weissella confuse, Pediococcus pentosaceus and Saccharomyces cerevisiae were the lactic acid bacteria (LAB) and yeast isolated from spontaneously fermented corn using 16S rRNA sequencing. The isolated organisms along with Lactobacillus plantarum were used as starter culture for controlled fermentation. There was a significant difference between the end products of both fermentations. All organisms except W. confuse showed probiotic potential. Acetate was produced during both fermentations but butyrate was produced during spontaneous fermentation only. There was however higher concentration of NO in controlled fermented corn than spontaneous fermentation with nitrate values of 30.54 µM and 23.21 µM and nitrite values of 17.50 µM and 10.11 µM respectively. These suggest that fermented corn may have probiotic potential and may be able to further enhance immune health in the gut by being a dietary source of SCFAs and NO.
  • Mangrove or mudflat: Prioritising fish habitat for conservation in a turbid tropical estuary

    Marley, Guy; Deacon, Amy; Philip, Dawn; Lawrence, Andrew; University of the West Indies, University of the West Indies, University of the West Indies, University of Chester
    Mangrove habitats are typically the focus of conservation efforts in tropical estuaries because their structural complexity is thought to support greater biodiversity and nursery function than unvegetated habitats. However, evidence for this paradigm has been equivocal in turbid tropical estuaries where unvegetated mudflats are also highly productive. The present study compared the community composition, biodiversity, nursery-role and commercial fish biomass in two mangrove habitats and one mudflat habitat in the Gulf of Paria, Trinidad. A total of 12 705 fishes, comprising 63 species from 26 families, were sampled in mangrove creeks, seaward mangrove fringe and the subtidal margin of an intertidal mudflat from June 2014 to June 2015. The composition of the creek and mudflat communities were distinct, while the community of the mangrove fringe more closely resembled the mudflat than the mangrove creeks. Mean species richness (MSR), total species richness (TSR) extrapolated from species accumulation curves, and juvenile species richness (JSR) were significantly greater in the mudflat (MSR = 11.4 ± 1.0; TSR = 75 ± 14; JSR = 9.1 ± 0.8) than mangrove creeks (MSR = 9.0 ± 0.5; TSR = 49 ± 3; JSR = 6.1 ± 0.4) and the seaward mangrove fringe (MSR = 6.4 ± 0.7; TSR = 58 ± 14; JSR = 5.2 ± 0.4). Meanwhile, Shannon Weiner diversity, juvenile fish abundance and commercial fish biomass were comparable between habitats. These findings caution against the generalisation that mangroves are the most important habitat for fishes in turbid tropical estuaries. There is now a growing body of evidence that mudflats warrant consideration as important repositories of biodiversity and nursery function for juvenile fishes.

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