A multi-metric approach to investigate the effects of weather conditions on the demographic of a terrestrial mammal, the European badger (Meles meles)

Models capturing the full effects of weather conditions on animal populations are scarce. Here we decompose yearly temperature and rainfall into mean trends, yearly amplitude of change and residual variation, using daily records. We establish from multi-model inference procedures, based on 1125 life histories (from 1987 to 2008), that European badger (Meles meles) annual mortality and recruitment rates respond to changes in mean trends and to variability in proximate weather components. Variation in mean rainfall was by far the most influential predictor in our analysis. Juvenile survival and recruitment rates were highest at intermediate levels of mean rainfall, whereas low adult survival rates were associated with only the driest, and not the wettest, years. Both juvenile and adult survival rates also exhibited a range of tolerance for residual standard deviation around daily predicted temperature values, beyond which survival rates declined. Life-history parameters, annual routines and adaptive behavioural responses, which define the badgers’ climatic niche, thus appear to be predicated upon a bounded range of climatic conditions, which support optimal survival and recruitment dynamics. That variability in weather conditions is influential, in combination with mean climatic trends, on the vital rates of a generalist, wide ranging and K-selected medium-sized carnivore, has major implications for evolutionary ecology and conservation

More than Mere Numbers: The Impact of Lethal Control on the Social Stability of a Top-Order Predator

Population control of socially complex species may have profound ecological implications that remain largely invisible if only their abundance is considered. Here we discuss the effects of control on a socially complex top-order predator, the dingo (Canis lupus dingo). Since European occupation of Australia, dingoes have been controlled over much of the continent. Our aim was to investigate the effects of control on their abundance and social stability. We hypothesized that dingo abundance and social stability are not linearly related, and proposed a theoretical model in which dingo populations may fluctuate between three main states: (A) below carrying capacity and socially fractured, (B) above carrying capacity and socially fractured, or (C) at carrying capacity and socially stable. We predicted that lethal control would drive dingoes into the unstable states A or B, and that relaxation of control would allow recovery towards C. We tested our predictions by surveying relative abundance (track density) and indicators of social stability (scent-marking and howling) at seven sites in the arid zone subject to differing degrees of control. We also monitored changes in dingo abundance and social stability following relaxation and intensification of control. Sites where dingoes had been controlled within the previous two years were characterized by low scent-marking activity, but abundance was similar at sites with and without control. Signs of social stability steadily increased the longer an area was allowed to recover from control, but change in abundance did not follow a consistent path. Comparison of abundance and stability among all sites and years demonstrated that control severely fractures social groups, but that the effect of control on abundance was neither consistent nor predictable. Management decisions involving large social predators must therefore consider social stability to ensure their conservation and ecological functioning

Extremely Low Genetic Diversity Indicating the Endangered Status of Ranodon sibiricus (Amphibia: Caudata) and Implications for Phylogeography

Background: The Siberian salamander (Ranodon sibiricus), distributed in geographically isolated areas of Central Asia, is an ideal alpine species for studies of conservation and phylogeography. However, there are few data regarding the genetic diversity in R. sibiricus populations. Methodology/Principal Findings: We used two genetic markers (mtDNA and microsatellites) to survey all six populations of R. sibiricus in China. Both of the markers revealed extreme genetic uniformity among these populations. There were only three haplotypes in the mtDNA, and the overall nucleotide diversity in the mtDNA was 0.00064, ranging from 0.00000 to 0.00091 for the six populations. Although we recovered 70 sequences containing microsatellite repeats, there were only two loci that displayed polymorphism. We used the approximate Bayesian computation (ABC) method to study the demographic history of the populations. This analysis suggested that the extant populations diverged from the ancestral population approximately 120 years ago and that the historical population size was much larger than the present population size; i.e., R. sibiricus has experienced dramatic population declines. Conclusion/Significance: Our findings suggest that the genetic diversity in the R. sibiricus populations is the lowest among all investigated amphibians. We conclude that the isolation of R. sibiricus populations occurred recently and was a result of recent human activity and/or climatic changes. The Pleistocene glaciation oscillations may have facilitated intraspecie

Just conservation: What is it and should we pursue it?

Efforts to realize conservation are often met with stakeholders contending that particular conservation actions are unfair for conflicting with their basic interests. A useful lens through which to view such conflict is social justice, which may be considered the fair treatment of others judged according three principles: equality, need, and desert (noun form of deserve). We formally demonstrate that (i) the subject of social justice (others) includes many non-human elements of nature and (ii) realizing conservation that is also socially just requires being guided by a non-anthropocentrism principle, whereby no human should infringe on the well-being of others any more than is necessary for a healthy, meaningful life. The concept, “healthy, meaningful life” is less vague and subjective than might be presupposed. That concept is for example subject to considerable objective reasoning through social and behavioral sciences. We indicate how realizing socially-just conservation requires another guiding, safeguard principle: If a significant and genuine conservation interest calls for restricting a human interest, that restriction should occur except when doing so would result in injustice. When the restriction would be unjust every effort should be made by all involved parties to mitigate the restriction to the point of no longer being unjust. This principle covers concerns often raised when conservation is opposed – e.g., financial costs, loss of cultural tradition. We explain how these two principles are neglected or excluded by many methods for resolving conservation conflicts and collaborative governance of natural resources

Deep uncertainty, public reason, the conservation of biodiversity and the regulation of markets for lion skeletons

Public reason is a formal concept in political theory. There is a need to better understand how public reason might be elicited in making public decisions that involve deep uncertainty, which arises from pernicious and gross ignorance about how a system works, the boundaries of a system, and the relative value (or disvalue) of various possible outcomes. This article is the third in a series to demonstrate how ethical argument analysis—a qualitative decision-making aid—may be used to elicit public reason in the presence of deep uncertainty. The first article demonstrated how argument analysis is capable of probing deep into a single argument. The second article demonstrated how argument analysis can analyze a broad set of arguments and how argument analysis can be operationalized for use as a decision-making aid. This article demonstrates (i) the relevance of argument analysis to public reasoning, (ii) the relevance of argument analysis for decision-making under deep uncertainty, an emerging direction in decision theory, and (iii) how deep uncertainty can arise when the boundary between facts and values is inescapably entangled. This article and the previous two make these demonstrations using, as an example, the conservation and sustainable use of lions

Deep uncertainty, public reason, the conservation of biodiversity and the regulation of markets for lion skeletons

Public reason is a formal concept in political theory. There is a need to better understand how public reason might be elicited in making public decisions that involve deep uncertainty, which arises from pernicious and gross ignorance about how a system works, the boundaries of a system, and the relative value (or disvalue) of various possible outcomes. This article is the third in a series to demonstrate how ethical argument analysis—a qualitative decision-making aid—may be used to elicit public reason in the presence of deep uncertainty. The first article demonstrated how argument analysis is capable of probing deep into a single argument. The second article demonstrated how argument analysis can analyze a broad set of arguments and how argument analysis can be operationalized for use as a decision-making aid. This article demonstrates (i) the relevance of argument analysis to public reasoning, (ii) the relevance of argument analysis for decision-making under deep uncertainty, an emerging direction in decision theory, and (iii) how deep uncertainty can arise when the boundary between facts and values is inescapably entangled. This article and the previous two make these demonstrations using, as an example, the conservation and sustainable use of lions

Just conservation: What is it and should we pursue it?

Efforts to realize conservation are often met with stakeholders contending that particular conservation actions are unfair for conflicting with their basic interests. A useful lens through which to view such conflict is social justice, which may be considered the fair treatment of others judged according three principles: equality, need, and desert (noun form of deserve). We formally demonstrate that (i) the subject of social justice (others) includes many non-human elements of nature and (ii) realizing conservation that is also socially just requires being guided by a non-anthropocentrism principle, whereby no human should infringe on the well-being of others any more than is necessary for a healthy, meaningful life. The concept, “healthy, meaningful life” is less vague and subjective than might be presupposed. That concept is for example subject to considerable objective reasoning through social and behavioral sciences. We indicate how realizing socially-just conservation requires another guiding, safeguard principle: If a significant and genuine conservation interest calls for restricting a human interest, that restriction should occur except when doing so would result in injustice. When the restriction would be unjust every effort should be made by all involved parties to mitigate the restriction to the point of no longer being unjust. This principle covers concerns often raised when conservation is opposed – e.g., financial costs, loss of cultural tradition. We explain how these two principles are neglected or excluded by many methods for resolving conservation conflicts and collaborative governance of natural resources