Towards a national platform for Australia’s islands

Islands are important for maintaining a range of biodiversity, cultural and economic values. However, islands around the world face major and complex conservation challenges, often shared across multiple islands. The variety of tenures and uses also means there is a lack of coordination in policy and management. Addressing these challenges requires sharing lessons of success and failure. To facilitate knowledge-sharing, we need to develop common frameworks, platforms, guidelines and legislation to devise, advise and support actions and collaborations aimed to enhance island conservation. These need to consider both human needs and biodiversity, interactions, research, practice, and information sharing across islands. Pathways may include knowledge, data and experience sharing to ensure that cross-State and Territory coordination can disseminate the lessons learned from island projects to island stakeholders and vice versa. We discuss examples of existing organisational management structures that can potentially form the basis for a timely new platform focusing on Australia’s islands. We propose an island alliance be established as a multi-disciplinary platform to improve coordination among Australia’s islands, and to represent Australia’s environmental island challenges and solutions. Such an alliance would aim to bridge island communities, practitioners, managers, researchers and cultural advisors across diverse and complementary spheres along the continuum from biodiversity and ecosystems to people and social entrepreneurship. This alliance would have a mandate to develop national environmental collaborations, research and standards relating to island environments, facilitate business entrepreneurship with complementary outcomes to manage the threats that face Australian islands, and contribute to improving biodiversity conservation outcomes. The platform would draw together practitioners, natural and social scientists, policymakers, and importantly indigenous and non-Indigenous island communities to lead innovative collaborations and support Australian islands

Editorial: Fifty Shades of Grey: Exploring the Dark Sides of Leadership and Followership

“I could stand in the middle of Fifth Avenue and shoot somebody and I wouldn’t lose any voters. Okay. It’s like incredible!” Donald J. Trump, President of the United States, in January 2016 at a campaign rally in Iowa. In light of corporate and political turmoil and subsequent questions raised about leaders’ dark sides, this Research Topic is particularly timely. We set out to contribute to theoretical, empirical and methodological advancements, focusing on dark sides of personality, processes, and perceptions, and how they relate to leader-follower relationships. Studies of the dark side of leadership follow a long-standing tradition (Conger, 1990), and initially focused mainly on negative leader traits such as narcissism (Braun, 2017) and leader behaviors such as abusive supervision (Schyns & Schilling, 2013; Tepper, 2007; Tepper, Simon, & Park, 2017; Hogan & Kaiser, 2005). The particular potential for toxicity to unfold at the intersections of leadership and followership has been noted (Padilla, Hogan, & Kaiser, 2007), yet research into this domain remains largely underdeveloped. While followership theories receive increasing attention (Uhl-Bien, Riggio, Lowe, & Carsten, 2014), the potential dark sides of followership or followers’ impact on dark-side leaders remain unclear. Deviating from the unidimensional view that leaders are omnipotent and to be blamed for negative outcomes, we seek to place emphasis on the different ‘shades’ of dark leadership by focusing on how dark leadership can be explained by taking leaders, followers, and their interaction in specific contexts into account. In line with the purpose to explore the intersections between dark-side leadership and followership, we saw three main themes emerging from the articles published in this Research Topic. The first theme revolves around leader traits and behaviors. It focuses on questions such as what makes a ‘dark-side’ leader and what ‘dark-side’ leaders do. The second theme accounts for the interaction between leaders’ and followers’ characteristics, and zooms in on the extent to which this interaction may affect the negative impact of ‘dark-side’ leadership or followership. Finally, the articles also reflect novel ideas, extensions and integration of current theories at the interface between leadership and followership

The value of migration information for conservation prioritization of sea turtles in the Mediterranean

Aim: Conservation plans often struggle to account for connectivity in spatial prioritization approaches for the protection of migratory species. Protection of such species is challenging because their movements may be uncertain and variable, span vast distances, cross international borders and traverse land and sea habitats. Often we are faced with small samples of information from various sources and the collection of additional data can be costly and time-consuming. Therefore it is important to evaluate what degree of spatial information provides sufficient results for directing management actions. Here we develop and evaluate an approach that incorporates habitat and movement information to advance the conservation of migratory species. We test our approach using information on threatened loggerhead sea turtles (Caretta caretta) in the Mediterranean. Location: The Mediterranean Sea. Methods: We use Marxan, a spatially explicit decision support tool, to select priority conservation areas. Four approaches with increasing amounts of information about the loggerhead sea turtle are compared, ranging from (1) the broad distribution, (2) multiple habitat types that represent foraging, nesting and inter-nesting habitats, (3) mark-recapture movement information to (4) telemetry-derived migration tracks. Results: We find that spatial priorities for sea turtle conservation are sensitive to the information used in the prioritization process. Setting conservation targets for migration tracks altered the location of conservation priorities, indicating that conservation plans designed without such data would miss important sea turtle habitat. We discover that even a small number of tracks make a significant contribution to a spatial conservation plan if those tracks are substantially different. Main conclusions: This study presents a novel approach to improving spatial prioritization for conserving migratory species. We propose that future telemetry studies tailor their efforts towards conservation prioritization needs, meaning that spatially dispersed samples rather than just large numbers should be obtained. This work highlights the valuable information that telemetry research contributes to the conservation of migratory species

Telomere Length and the Cancer–Atherosclerosis Trade-Off

Modern humans, the longest-living terrestrial mammals, display short telomeres and repressed telomerase activity in somatic tissues compared with most short-living small mammals. The dual trait of short telomeres and repressed telomerase might render humans relatively resistant to cancer compared with short-living small mammals. However, the trade-off for cancer resistance is ostensibly increased age-related degenerative diseases, principally in the form of atherosclerosis. In this communication, we discuss (a) the genetics of human telomere length, a highly heritable complex trait that is influenced by genetic ancestry, sex, and paternal age at conception, (b) how cancer might have played a role in the evolution of telomere biology across mammals, (c) evidence that in modern humans telomere length is a determinant (rather than only a biomarker) of cancer and atherosclerosis, and (d) the potential influence of relatively recent evolutionary forces in fashioning the variation in telomere length across and within populations, and their likely lasting impact on major diseases in humans. Finally, we propose venues for future research on human telomere genetics in the context of its potential role in shaping the modern human lifespan

The global distribution and drivers of alien bird species richness

Alien species are a major component of human-induced environmental change. Variation in the numbers of alien species found in different areas is likely to depend on a combination of anthropogenic and environmental factors, with anthropogenic factors affecting the number of species introduced to new locations, and when, and environmental factors influencing how many species are able to persist there. However, global spatial and temporal variation in the drivers of alien introduction and species richness remain poorly understood. Here, we analyse an extensive new database of alien birds to explore what determines the global distribution of alien species richness for an entire taxonomic class. We demonstrate that the locations of origin and introduction of alien birds, and their identities, were initially driven largely by European (mainly British) colonialism. However, recent introductions are a wider phenomenon, involving more species and countries, and driven in part by increasing economic activity. We find that, globally, alien bird species richness is currently highest at midlatitudes and is strongly determined by anthropogenic effects, most notably the number of species introduced (i.e., "colonisation pressure"). Nevertheless, environmental drivers are also important, with native and alien species richness being strongly and consistently positively associated. Our results demonstrate that colonisation pressure is key to understanding alien species richness, show that areas of high native species richness are not resistant to colonisation by alien species at the global scale, and emphasise the likely ongoing threats to global environments from introductions of species.Ellie E. Dyer, Phillip Cassey, David W. Redding, Ben Collen, Victoria Franks, Kevin J. Gaston, Kate E. Jones, Salit Kark, C. David L. Orme, Tim M. Blackbur

Incorporating feasibility and collaboration into large-scale planning for regional recovery of coral reef fisheries

Broad-scale overharvesting of fish is one of the major drivers of marine biodiversity loss and poverty, particularly in countries with high dependence on coral reefs. Given the heterogeneity of fishing effort and management success, and the scarcity of management resources, it is necessary to identify broad-scale locations for promoting successful fisheries management and conservation. Here, we assessed how fisheries management and conservation priorities in the Western Indian Ocean would change if the objectives were to (1) minimize lost fishing opportunity, (2) minimize the time for fish biomass to recover, (3) avoid locations of low management feasibility based on historical management outcomes, and (4) incorporate international collaboration to optimize the rate for achieving goals. When prioritizing for rapid recovery of fish biomass rather than minimizing lost fishing opportunity, we found that the area of priority management zones changed by over 60% in some countries. When locations of low management feasibility were avoided, the recovery time of fish biomass across the region increased 4-fold. International collaborations prioritized management zones in remote, high biomass, and low fishing pressure reefs and reduced the recovery time of fish 5-fold compared to non-collaboration scenarios. Thus, many of these conservation objectives favored wealthy and sparsely populated over poorer and natural resource dependent countries. Consequently, this study shows how prioritization policies, incentives, decisions, and conflicts will produce highly variable outcomes and challenges for sustainability

AltitudeOmics: The Integrative Physiology of Human Acclimatization to Hypobaric Hypoxia and Its Retention upon Reascent.

An understanding of human responses to hypoxia is important for the health of millions of people worldwide who visit, live, or work in the hypoxic environment encountered at high altitudes. In spite of dozens of studies over the last 100 years, the basic mechanisms controlling acclimatization to hypoxia remain largely unknown. The AltitudeOmics project aimed to bridge this gap. Our goals were 1) to describe a phenotype for successful acclimatization and assess its retention and 2) use these findings as a foundation for companion mechanistic studies. Our approach was to characterize acclimatization by measuring changes in arterial oxygenation and hemoglobin concentration [Hb], acute mountain sickness (AMS), cognitive function, and exercise performance in 21 subjects as they acclimatized to 5260 m over 16 days. We then focused on the retention of acclimatization by having subjects reascend to 5260 m after either 7 (n = 14) or 21 (n = 7) days at 1525 m. At 16 days at 5260 m we observed: 1) increases in arterial oxygenation and [Hb] (compared to acute hypoxia: PaO2 rose 9±4 mmHg to 45±4 while PaCO2 dropped a further 6±3 mmHg to 21±3, and [Hb] rose 1.8±0.7 g/dL to 16±2 g/dL; 2) no AMS; 3) improved cognitive function; and 4) improved exercise performance by 8±8% (all changes p<0.01). Upon reascent, we observed retention of arterial oxygenation but not [Hb], protection from AMS, retention of exercise performance, less retention of cognitive function; and noted that some of these effects lasted for 21 days. Taken together, these findings reveal new information about retention of acclimatization, and can be used as a physiological foundation to explore the molecular mechanisms of acclimatization and its retention