Sian Davies-Vollum

Sian Davies-Vollum
University of Derby · Department of Environmental Sciences

About

29
Publications
4,302
Reads
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422
Citations
Additional affiliations
January 2018 - November 2019
University of Derby
Position
  • Head of Department

Publications

Publications (29)
Chapter
Lagoons are a common feature of the low-lying West African coastline. These lagoons are resource-rich and biodiverse. The small-scale fishing communities, which border them, are dependent on the resources and ecosystem services for their livelihoods and well-being. Climate change has had significant and diverse effects on both the lagoons and their...
Article
Rural coastal communities in the global south are mostly natural resource-dependent and their livelihoods are therefore vulnerable to the impacts of climate and environmental changes. Efforts to improve their adaptive capacity often prove mal-adaptive due to misunderstanding the dynamics of the unique socioeconomic factors that shape their vulnerab...
Article
Full-text available
Slope instability phenomena such as mudslides represent a major geohazard in Brazil, which has caused devastation in many states and affected the lives of people, particularly in self-built settlements on steep slopes. This paper presents and discusses slope stability issues encountered in Caxias do Sul in the State of Rio Grande do Sul, which exem...
Poster
Full-text available
Global warming affects the growth and reproduction processes of many marine fish species and this is expected to reduce maximum catch and revenue potential globally1. The brunt of this impact will be borne by artisanal fisherfolk who also commonly contend with multiple socioeconomic challenges. This study contributes empirical evidence from a fishi...
Article
Full-text available
Lagoon-barrier systems are a dynamic coastal environment. When an ephemeral connection between a lagoon and the ocean develops, it has significant impact on hydrology, sedimentology and ecology. Increasingly, human actions and sea level rise also influence lagoons with the potential to increase their connectivity with the ocean. The Muni-Pomadze la...
Presentation
Full-text available
This video we look at the physical geography of sand dunes using the case study Gibraltar Point National Nature Reserve: Fresh water dune slacks • Salt marshes • Coastal wetlands
Presentation
Full-text available
This video, we look at the physical geography of sand dunes, using the case study of Gibraltar Point National Nature Reserve: Sediment cells • Sediment deposition • Sand dune formation • Embryo dunes • Fore dunes • Yellow dunes • Grey dunes • Dune heath (climax)
Article
Full-text available
The National Coal Mining Museum in West Yorkshire affords a rare opportunity for the public to visit a former colliery (Caphouse) and experience at first hand the geology of a mine. The geology at the museum can be seen via the public tour, limited surface outcrop and an inclined ventilation drift, which provides the best geological exposure and in...
Article
Lagoon-wetland systems are common along low-lying coastlines. They provide rich species habitats, multiple ecosystem services and socio-economic activities. They are particularly susceptible to the impacts of sea level rise (SLR), especially in less developed countries (LDCs) where economic and development constraints limit adaptation. The Muni-Pom...
Article
Full-text available
The Eocene-Oligocene transition (EOT) is typically interpreted as a time of drastic global cooling and drying associated with massive growth of a glacial icecap in Antarctica and the shift to an "icehouse" climate. The effects of this transition on the terrestrial environments, floras, and faunas of the Southern Hemisphere, however, have been uncle...
Article
Five late Carboniferous (Pennsylvanian) coal seams and associated inter-seam strata have been examined at Lodge House surface mine in the East Midlands Coalfield of England. Deposition of these coal seams and their accompanying inter-seam intervals occurred in an equatorial fluvio-lacustrine environment in an area approximately halfway between the...
Article
Alexandrium catenella cyst distribution and abundance in the surface sediments throughout Puget Sound, Washington, were mapped for the first time in 2005. Cyst density varied from 0 to >12,000cystscm−3 surface sediment, with Quartermaster Harbor having the highest concentration of cysts. A higher resolution 2006 spatial survey of surface sediment c...
Article
Full-text available
The Fossil Forest Research Natural Area (FFRNA) in New Mexico is the site of an exceptionally preserved fossil forest of Campanian age. This study combines paleoecological, taxonomic, and sedimentological analysis, together with GIS mapping of 68 fossil tree stumps and nine fossil logs, in order to provide a detailed description of this forest. Woo...
Article
Outcrops of Pennsylvanian (Duckmantian) age coal-bearing strata in the East Midlands of England are rare and have become rarer as more of the surface environment has been developed. Much of the stratigraphic correlation and paleoenvironmental interpretation of these strata have thus been based on subsurface data from deep mine workings and coal exp...
Article
Full-text available
Since the 1870s, the Saskatchewan River at the Cumberland Marshes (east-central Saskatchewan, Canada) has been undergoing progradational avulsion, resulting in development of a 500 km(2) avulsion belt. The avulsion belt consists of an unstable network of active and abandoned channels, splays, and floodbasins, some containing small shallow lakes. Fi...
Article
Multi-week, research style projects within the context of a one-semester undergraduate course provide scope to explore topics in depth and build students skills. I developed a research-style project for an undergraduate sedimentology course using grain size analysis of sediments that combines developing field and laboratory skills, improving writin...
Article
Mudrock-dominated channel fills are common features of the fluvial Palaeogene Willwood Formation of Wyoming. These fills are small, on average 30 m wide and 3 m deep, and they vary from simple plugs to more lithologically complex fills with internal scour surfaces. Some fills preserve plant material, and others show pedogenic modification. All fill...
Article
Stratigraphically limited intervals from the Lower Eocene Willwood Formation contain laterally extensive carbonaceous shales and ribbon sandstone networks associated with channel avulsion. We present data from one such interval that documents the avulsion sequence. Vertical sections measured along the outcrop of this interval are similar and compri...
Article
Drab, grey mudrocks consistently occur below carbonaceous shales in lower Tertiary alluvial sediments of the Western Interior basins of the USA. Superficially these mudrocks, here termed underbeds, look similar to underclays commonly found below coal beds. However, it is unclear whether the association between the carbonaceous shales and the underb...
Article
An upper-level paleoclimatology class undertook a student-directed dendroclimatology research project using college climate records, and cores and cross sections from trees on campus. The class measured the annual variation in width of the tree rings, constructed plots of annual ring-width variation, and standardized these plots to account for the...
Article
Full-text available
In-depth understanding of past climatic and biotic change requires the study of ancient ecosystems. However, terrestrial plants and vertebrates are preferentially preserved under very different taphonomic conditions, and diverse fossil floras and faunas are rarely found in close association. Big Multi Quarry and associated strata in the uppermost F...
Article
Full-text available
Alluvially deposited carbonaceous beds are a major source of leaf compression fossils, but the accumulation of both the sediments and the fossils is poorly understood. We have studied the sediments and fossil plant assemblages of three laterally extensive carbonaceous beds from the Eocene of the Bighorn. Basin, Wyoming. Field, laboratory, and micro...
Article
Twenty one early Palaeocene floral assemblages were collected from a variety of alluvial depositional environments from sites in the Williston, Powder River and Raton basins of the western interior of the USA. Leaf fossils were assigned to morphotypes and their physiognomy was quantified for palaeoclimatic analysis. Two methods were used, Climate L...

Projects

Projects (4)
Project
To develop a multi-disciplinary network focused on the challenges facing lagoon communities in West Africa: the resilient lagoon community network (RCLN). Objectives: 1. To unite researchers, practitioners, policy-makers and stakeholders in a network to understand the problems facing West African coastal lagoons and the communities they support. 2. To provide a participatory platform that allows stakeholders to share expertise, experiences and best practices for building resilience in coastal communities. 3. To support the development of a UK-West Africa coastal-focused research community that can respond to a broad range of funding calls, develop successful funding bids and launch coastal focused projects that improve lagoon community resilience and support environmental resilience. 4. To develop a framework for addressing the challenges faced by West African coastal communities that can inform coastal management and decision-making in the region. 4. To build a community of researchers and grow research capacity in West African partners that supports high-quality, internationally excellent research related to coastal issues The network will facilitate knowledge transfer and dialogue between experts from across natural and social science, engineering and education. If you are a coastal researcher based in West Africa and are interested in joining us please contact me
Project
To understand the dynamics of adaptation of climate and environmental change in coastal communities in developing countries