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Evolution of solitary waves and an undular bore intruding through an abrupt transition from a wide basin into a narrow channel with opposing current is investigated. The laboratory experiments are performed in a wave tank that is crafted to achieve a steady and symmetrical shallow-water jet in the basin. The channel has a breadth comparable to the wave lengths, and the flow has Froude number approximately 0.1. The opposing current amplifies and slows the incoming waves on the jet in the basin, but the propagation speed is faster than the local Doppler effect of the current due to the influence of the wave propagating in the flank of the jet. At the channel mouth, the wave amplitude is enhanced due to the waveform altered by the current in the basin, although the amplification in the upstream channel is similar with and without the current. The longer incident waves have greater amplification into the channel. The leading wave of the undular bore is impacted by the opposing flow and transition similarly to the solitary waves. In contrast, the subsequent waves of the undular bore have a complex phase interference on the jet that causes disconnection in the lateral wave formation across the breadth of the jet. At the transition, the subsequent waves exhibit greater amplification than the leading one due to accumulated wave energy at the channel mouth. The intrusion of the undular bore against the current further enhances a rise in mean water level in the channel.
The bauxite beneficiation process in the Amazon generates a significant amount of tailings, which were historically stored in large basins without a designated purpose. One of these materials is clay obtained from the bauxite washing process, which is rich in Al2O3 minerals, primarily gibbsite and kaolinite, and currently lacks practical applications. This study aimed to explore an application of this tailing in the production of low-temperature geopolymers, considering its material characteristics and availability. Geopolymer synthesis was conducted following a Doehlert-type experimental design to evaluate the properties of the raw materials. The tailing was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetry-differential scanning calorimetry (TG-DSC), X-ray fluorescence (XRF), and inductively coupled plasma optical emission spectroscopy (ICP-OES), whereas the geopolymers were characterized by XRD, FTIR, and mechanical compressive strength testing. The mineralogical composition of the bauxite tailings consists of 45% of low-ordered kaolinite, 34% of gibbsite, and 21% of other minerals. Compressive strength values of the geopolymer produced ranged from 8.99 to 41.89 MPa, a good value for the type of geopolymer produced. The best compressive strength results were obtained at a low Na/Al ratio (0.5–0.6) and low curing temperature, which favors the application of the material for the synthesis of geopolymer, contributing to lower energy consumption and lower CO2 emissions compared with usual geopolymers.
“Those who destroy the environment get rich, while we who protect it remain poor.”
John Kahekwa, Pole Pole Foundation
It is far easier to make money exploiting the environment than it is protecting it. It is that basic insight that is at the heart of the strategy set out in this book to help bring the global illegal wildlife trade to an end.
I’ve worked with John Kahekwa and his team in the Pole Pole Foundation (or POPOF for short) for over a decade. As a multi-award-winning conservation charity and Earthshot Prize finalist working in one of the toughest countries on earth, they are at the sharp end of conservation and have seen it all. John started his career as a ranger protecting and habituating gorillas in Kahuzi-Biega National Park where in the 1980s he took tourists to visit them, including Al Gore and Bill Gates, while also helping with the filming of Gorillas in the Mist. After using a ten dollar tip to launch a successful souvenir business, he launched the Pole Pole Foundation in 1992 to give back to the community and to further protect the critically endangered gorillas. Since then he and his family have experienced the horrors of what has been termed “Africa's World War”, which is estimated to have caused around 5 million deaths, and killed 80–90 per cent of the Grauer's gorillas that he works to protect. In the chapters that follow I have sought to combine the insights gained from working with John and his team with the work of other researchers and practitioners, including those focused on global demand reduction and countering international organized crime, to develop an effective strategy to counter the illegal wildlife trade (IWT).
A lot of people I come across in my work, including some on the frontline of conservation, do not think that IWT can be stopped and that the current “fire-fighting” approach is all that can be realistically achieved in the face of what seem overwhelming odds. Anyone who watches the news can understand their point of view, but the outlook is not all negative. Progress has been made.
I have worked in the conservation field for almost 15 years and have found broadly the same problems faced across the sector. Most of my experience is in Africa, especially east and southern Africa and the Democratic Republic of Congo (DRC), including my work with the multi-award winning conservation NGO and Earthshot Prize finalist the Pole Pole Foundation to develop a blueprint for national park conservation. However during my doctoral research I have worked with many organizations from other parts of the world and have seen and heard the same problems arising. This book is the result: a strategy developed from the practices that I have found to deliver effective results, combined with learning from projects that have been unsuccessful. Although some readers may feel that there is not much new in this book, I hope the synthesis of a large body of knowledge from the sector into a simplified set of insights and, most importantly, a workable strategy to help bring an end to the illegal wildlife trade, will be welcomed.
I have primarily worked with military and commercial organizations, where the approach is to understand a problem, develop an effective and cost-efficient strategy to solve it, and then task and support well-trained people to deliver that strategy on the ground and in so doing, adapt and overcome the specific challenges faced in that process. This book is designed to be just such a strategic handrail, but it necessarily relies on people being able to execute the strategy effectively. For example, law enforcement requires trained and experienced professionals to be successful, and monetizing nature requires commercially minded people to execute business models, raise revenue, and deliver high-quality products that appeal to the market.
It is this alignment of people and strategy that is key to success in the real world and it is where the environmental sector has often struggled. There are some phenomenal people working in conservation, often at great personal risk, who are poorly paid and under-resourced. Without them the situation would be a great deal worse, but too much of their work is fire-fighting.
The crystal structure of cummingtonite-(P21/m) was characterised by single-crystal structure-refinement, infrared spectroscopy and 57Fe Mössbauer spectroscopy. Previous cummingtonite-(P21/m) specimens characterised have Mn2+ as the dominant constituent at M(4) but this amphibole has Fe2+ dominant at M(4). The formula of the amphibole was corrected for minor exsolved calcium-amphibole and is (Mg5.66Fe2+1.28Mn0.06)Σ7.00Si8.00O22(OH)2. The crystal structure (a = 9.4885(19), b = 18.040(4), c = 5.2891(11) Å, β = 102.06(3)°, V = 885.4(3) Å3, space group P21/m and Z = 2), was refined to an R1-index of 3.34% for 2338 observed reflections. Site-occupancy refinement gave the following site-populations: M(1) = 1.972(8) Mg + 0.028 Fe2+, M(2) = 2.000 Mg, M(3) = 0.989(6) Mg + 0.011 Fe2+, M(4) = 0.815(8) Mg + 1.125 Fe2+ + 0.060 Mn2+ apfu. Infrared spectroscopy in the principal (OH)-stretching region shows two peaks, at 3367 and 3652 cm–1, that were assigned to the local arrangements M(1)MgM(1)MgM(3)Mg–OH and M(1)MgM(1)Fe2+M(3)Mg–OH (≈ M(1)MgM(1)MgM(3)Fe2+–OH) with relative intensities in accord with the refined site-populations. 57Fe Mössbauer spectrum shows three quadrupole-split doublets with parameters indicative of octahedrally coordinated Fe2+ at M(4) and M(1,2,3), and octahedrally coordinated Fe3+ that occurs in exsolved calcium amphibole. All three techniques indicate a small amount of Fe2+ at M(1,2,3) despite the fact that there is more than sufficient CMg to completely fill the M(1,2,3) sites: 5.66 Mg pfu. Issues involving the current and possible future nomenclature and classification of the magnesium-iron-manganese amphiboles are discussed in detail.
This chapter sets out an imagined example of what the SWIPRO strategy could look like when executed in the real world. As I have outlined, the SWIPRO approach addresses the underlying causes of IWT, chiefly by developing business solutions to solve the economic equation. Those businesses then provide the funds to pay for enhanced law enforcement and community support in and around protected areas to solve the poacher's equation and, at the national and global level, to support efforts to break criminal networks through financial investigations and to help deliver a commercial approach to reduce IWT demand through substitution. I believe the SWIPRO strategy offers the most effective and workable solution to bring IWT to an end.
In the sections below I set out a fictional protected area to show how the SWIPRO strategy can best be applied in different contexts. I also provide some imagined solutions to break networks and for products and campaigns to reduce IWT demand through substitution. Not all of these ideas will necessarily work in the real world exactly as set out in this chapter, but the intent is to show what could be delivered to provide inspiration to those with the motivation and capability to make such ideas happen.
THE NATIONAL PARK (TNP)
TNP is an imagined protected area with good road transport links to the country's main city which contains both a maritime port and an international airport. Surrounding TNP live local communities facing high levels of poverty, a lack of education and health facilities and a 20 per cent child malnutrition rate. TNP contains the “Big 5” game – lions, leopards, buffalo, elephants and rhinos – as well as a host of other mammals, birds and reptiles, including pangolins. Organized criminal networks operate in TNP, recruiting members of the local community to support experienced poachers to kill rhinos and elephants, and paying poachers in the local community for big cat skins and bones, and captured pangolins. High levels of poaching have led to population declines in all the key species in TNP, so the wildlife authority and conservation NGOs operating in and around the park have asked for outside support to help them implement the SWIPRO strategy. That support began five years ago, and the results are set out below.
I was speaking to a well-respected Zambian wildlife police officer (ranger) working in Kafue National Park in Zambia to find out more about the poaching situation in the park. After he had outlined the problems they were having, I asked if poaching continued throughout the year and in all areas of the park. He said there was no poaching on the western edge of the park in July and August. This was the time of the tobacco harvest, which created a lot of local employment, removing the need and the time to poach. Although not a perfect example of a business solution to CIWT – some of the tobacco farms were encroaching on the game management areas and there was no link between the tobacco companies and conservation – that example, especially the ranger's remark that they had neither the need nor the time to poach has remained with me.
The central argument of this chapter is that generating revenue from diversified business models associated with conservation at the tactical level is the lynchpin for success in CIWT (we shall examine the strategic level in Chapter 6 on demand reduction). The more revenue that protected areas can generate, the stronger the justification for conservation and the more success is likely to be achieved: “if it pays it stays”. That increased revenue creates powerful economic interests for protection over exploitation, flipping the economic equation on its head as conservation becomes a profitable activity instead of a cost, and more money can be generated from conservation than illegal exploitation.
I believe that the most effective business models are those that offer protection, income and employment for protected areas and the communities living around them. Protection comes in the form of physical barriers to entry for potential poachers, the security provided by the businesses themselves, and the deterrent effect of strong economic interests tied to conservation. Income relates to how much revenue can be generated by businesses associated with conservation, both to make the economic case that protection can compete and win on commercial terms over exploitation, and to provide finance for the other elements of SWIPRO through revenue shares to organizations delivering CIWT activity. Employment directly addresses the poacher's equation by removing the need to poach and winning the support of local communities.
Cation exchange competition (CEC) is driven by water uptake during saturation of bentonite barriers surrounding canisters releasing heat from radioactive waste. CEC differences may be used to follow smectite degradation. The unanswered question is whether processes can be understood in more detail by studying a full set of 30 bentonite blocks of the Alternative Buffer Material (ABM) test series (ABM-5) after reaction in an underground laboratory operated in crystalline rock at temperatures of ~250°C, the highest reported temperature so far. In contrast to expectations, only a minor CEC decrease of, on average, 1.8 meq 100 g–1 was detected, although processes depending on high temperature were expected to alter the swelling properties of smectites that can be followed analytically by reducing bentonite CEC values. A critical role of initial water saturation and initially ~25% Na+/CEC on exchangers was identified by comparison with the first ABM-1 package where CEC decreased by on, average, 5.5 meq 100 g–1. ABM-1 was heated from the start whereas the packages ABM-2 and ABM-5 in this study were heated after water saturation. Exchangeable cations (EC) were distributed within the whole barrier in ABM-5 with (1) more pronounced horizontal EC gradients and (2) the absence of an exchangeable Na+ decrease. In all tests, a cation equilibration with the Äspö groundwater averaged over the whole packages of many different buffer materials was observed, showing, overall, a significant range in final composition after retrieval: Na+ (27–46%/CEC), Mg2+ (7–15%/CEC), and Ca2+ (45–100%/CEC). The groundwater for saturation, however, was locally variable in composition. Although excluded from the smectite interlayer (below or equal to 2 water layers), Cl– entered the barrier from groundwater, increased significantly in nearly all ABM-5 bentonite blocks, and was found to be mobile also in the less heated ABM-1 and ABM-2 test packages.
Frederick the Great of Prussia was concerned about the risk of famine due to the dependence of the population on wheat as their main source of carbohydrates. He wanted to diversify away from this monocrop by getting peasant farmers to grow potatoes. However, despite his best efforts to force the new crop on his subjects, he failed; Prussian peasants said that potatoes tasted so horrible that not even dogs would eat them. So he tried a different tack, declaring the potato to be a royal vegetable, only to be grown within the palace grounds and guarded night and day by armed soldiers. Secretly, however, the soldiers were told not to do a very good job. Sure enough, as word spread about the exclusive new royal vegetable, thieves entered the grounds to steal the potatoes, a black market soon emerged, and farmers all over Prussia started to grow the new crop.
I enjoy this story because it shows what can be achieved by the clever use of psychology in marketing, and that the obvious way to achieve a goal is not always the most effective. It is this type of behavioural approach that could be utilized to weaken demand for IWT products. The approach also helps us to better understand what underpins demand for IWT products. For example, as discussed in previous chapters, rhino horn is now more valuable than gold. This is not just as a result of scarcity and market forces, or demand for its medicinal properties (it has none), but because it has become a symbol of conspicuous consumption; a recent trend among Vietnamese millionaires is to have rhino horn ground into expensive cocktails.
Such cultural trends can emerge quite suddenly and unpredictably, leading to increases in poaching and the trade in a particular species, and they can be difficult to identify; it can take time to notice sustained increases in exploitation and trading of individual species, and often by the time the increase is identified, the damage to the species is already severe, as we saw in Chapter 1. The current approach to demand reduction then requires grant applications to be completed and campaigns to be developed to raise the profile of the species involved, which takes time, all the while the species is being lost.
As part of my Masters degree I had to undertake an internship in a region of armed conflict or post-conflict, working with a relevant NGO on the topic of my dissertation. I wanted to examine the linkages between conservation and postwar recovery, and was fortunate to get the chance to work in eastern DRC and Rwanda. One of the projects being run by the NGO that I interned with was a honey cooperative. They were working with local communities to develop a social enterprise to produce and sell honey in nearby markets, to create employment and income to stop poaching.
The idea was sound, but the execution epitomized why CIWT approaches have yet to scale and bring an end to the trade. A Ugandan member of the team, with no commercial background, was trying to teach members of the Rwandan local community, via a translator, how to develop a business model to produce, process, transport and sell their honey. I bought a pot of honey back home with me and ran some taste tests with friends and family, all of whom were impressed by the quality. Here was a product – “gorilla-friendly” honey – that tasted great and could potentially have built a strong brand, but it was going nowhere. That was my first experience of how important it is to get the right people involved, and it was the first time I saw the potential to scale existing conservation projects to deliver a commercial solution. There is some great work in the CIWT space, but without a shift in strategy that will enable that work to significantly expand its impact, the trade is unlikely to end. It echoes a point made by John and his POPOF team in the DRC; they know what is needed to stop poaching, but they don't know how to execute those ideas at the scale required to end poaching. You can have the greatest strategy in the world, but if you don't have the people or finance in place to execute it effectively, the chances of failure remain high.
Loess–paleosol outcrops were logged and dated to trace loess cover during the Pleistocene in a low-elevation mountainous area. The exposed successions were a maximum of 15 m thick and stratigraphically fragmentary. Still, results suggest that loess was deposited in all climatically suitable periods within the limits of the dating methods (ca. 400 ka), and probably also beyond this. Luminescence measurements provided numerical ages from ca. 18 ka to ca. 200 ka and minimum ages of up to >267 ka. Loess accumulation was also active during the relatively mild MIS 3. A new occurrence of a well-preserved Quaternary tephra was documented, correlative with the middle Pleistocene Bag Tephra (ca. 340 or 368 ka). The dating of loess successions provided valuable data on geomorphic evolution as well, identifying hydrological changes and constraining a maximum incision and uplift rate of 0.008–0.035 mm/yr for the western part of the area. The low thickness of loess–paleosol successions and the stratigraphic gaps seem to be a consequence of repeated erosion during the Pleistocene rather than a result of non-deposition. The mountains probably have been covered with loess for most of the time during the past 1 Ma. This should be taken into consideration in studies influenced by the loess cover of an area.
I often wish that authors would provide a concise distillation of their book to refer back to after reading the whole tome. A short version, highlighting the key takeaways, can be a helpful rapid remind and revise and point the reader back to specific chapters to reread in more detail. I’ve tried to do that here.
The illegal wildlife trade (IWT) is estimated to be worth up to $20 billion per year and threatens the survival of thousands of species of flora and fauna. The trade is facilitated by organized criminal groups, many of which are involved in other illicit activities, utilizing the same networks and routes to move IWT products. IWT increases the risk of future pandemics due to the risk of zoonotic disease transfer from wildlife to humans, and also entrenches corruption throughout the supply chain.
The trade can be broken down into two component parts: the act of poaching, including the capture of live animals; and the subsequent trade in the wildlife products, such as ivory, from point of capture to point of sale. Most of the funds from IWT come at the point of sale, with poachers often receiving only a few cents on the dollar of the overall trade. This leads source countries and communities to lose the economic benefits from conservation and taxation of legal businesses, but it also offers an opportunity to intervene at the lowest level to stop poaching at source. I argue that these low-level interventions are the most effective interventions; “save the animal to kill the trade”.
To help understand what is driving the trade, I set out two frameworks: the economic equation and the poacher's equation. The economic equation identifies the asymmetry in the trade, with exploitation cheap and lucrative, while conservation is expensive and poorly-funded, leading organized criminal groups to view the trade as low-risk and high-reward. The poacher's equation focuses on why an individual or community would poach or not, setting the potential gain against the potential loss, divided by the perceived risk of getting caught. By solving both of these equations we can help bring an end to IWT.
Although both butterflies and dragonflies are four-winged insects, their wing geometries and kinematics differ significantly. Butterflies have a much narrower gap between their forewing and hindwing than dragonflies. While previous research has extensively investigated the forewing–hindwing interactions in dragonfly flight, this work focuses on their interactions in butterfly flight. The interactions are studied based on numerical simulations of the Navier–Stokes equations around a butterfly-inspired flapping wing with an adjustable slot, representing the narrow gap between the forewing and hindwing. The slot is controlled by a dihedral angle between the forewing and hindwing. The lift coefficients of wings with different slot sizes and locations are investigated in detail. The results show that the forewing–hindwing interactions can significantly enhance the lift if the slot is properly configured. When the slot is configured by elevating the forewing at a 10-degree dihedral angle relative to the hindwing during flapping flight, the wing generates over 20 % more lift than the model without a slot. The streamwise ram effect and tip-vortex capture are shown to be responsible for the lift enhancement by using a lift decomposition formula. The streamwise ram effect reduces the streamwise velocity beneath the forewing, decreasing the negative vortex lift associated with spanwise vorticity. The tip-vortex capture enhances the positive vortex lift associated with streamwise vorticity when the hindwing captures the tip vortex shedding from the forewing.
We synthesized pre-last glacial maximum pollen records to reconstruct North American pollen diversity since ca. 130 ka. Using taxonomic diversity (a measure of the number and abundance of taxa) and functional diversity (a measure of the number and abundance of different phenotypes) we identified temporal and spatial diversity trends for six North American bioregions: Arctic, Intermountain West, Mexico, Pacific Northwest, Southeast, and Yucatán. Reconstructed taxonomic temporal and spatial trends vary among bioregions, with regional diversity patterns captured in the functional metric, suggesting shifts in species composition coincide with shifts in ecosystem function. However, significant shifts in taxonomic pollen diversity differed in frequency, magnitude, and timing from their functional counterparts. Variations in both regional taxonomic and functional diversity response to global and regional temperature trends were evident, suggesting temperature alone does not fully explain changes in species composition. Regional richness estimates exhibited higher stability relative to the weighted diversity estimates indicating low levels of species turnover through Late Quaternary warming–cooling phases. Shifts in regional diversity did not predictably respond to stadial and interstadial transitions. Instead, North American patterns of plant diversity over the last ca. 130 ka differ geographically, likely responding to regional rather than global climate change.
Liouville-type theorems for the steady incompressible Navier–Stokes system are investigated for solutions in a three-dimensional (3-D) slab with either no-slip boundary conditions or periodic boundary conditions. When the no-slip boundary conditions are prescribed, we prove that any bounded solution is trivial if it is axisymmetric or $ru^r$ is bounded, and that general 3-D solutions must be Poiseuille flows when the velocity is not big in $L^\infty$ space. When the periodic boundary conditions are imposed on the slab boundaries, we prove that the bounded solutions must be constant vectors if either the swirl or radial velocity is independent of the angular variable, or $ru^r$ decays to zero as $r$ tends to infinity. The proofs are based on the fundamental structure of the equations and energy estimates. The key technique is to establish a Saint-Venant type estimate that characterizes the growth of the Dirichlet integral of non-trivial solutions.
Small-scale shear layers arising from the turbulent motion of viscoelastic fluids are investigated through direct numerical simulations of statistically steady, homogeneous isotropic turbulence in a fluid described by the FENE-P model. These shear layers are identified via a triple decomposition of the velocity gradient tensor. The viscoelastic effects are examined through the Weissenberg number ($\textit{Wi}$), representing the ratio of the longest polymer relaxation time scale to the Kolmogorov time scale. The mean flow around these shear layers is analysed within a local reference frame that characterises shear orientation. In both Newtonian and viscoelastic turbulence, shear layers appear in a straining flow, featuring stretching in the shear vorticity direction and compression in the layer normal direction. Polymer stresses are markedly influenced by the shear and strain, which enhance kinetic energy dissipation due to the polymers. The shear layers in viscoelastic turbulence exhibit a high aspect ratio, undergoing significant characteristic changes once $\textit{Wi}$ exceeds approximately 2. As $\textit{Wi}$ increases, the extensive strain weakens, diminishing vortex stretching. This change coincides with an imbalance between extension and compression in the straining flow. In the shear layer, the interaction between vorticity and polymer stress causes the destruction and production of enstrophy at low and high $\textit{Wi}$ values, respectively. Enstrophy production at high $\textit{Wi}$ is induced by normal polymer stress oriented along the shear flow, associated with the diminished extensive strain. The $\textit{Wi}$-dependent behaviour of these shear layers aligns with the overall flow characteristics, underscoring their pivotal roles in vorticity dynamics and kinetic energy dissipation in viscoelastic turbulence.