Biodiversity Collapse Research Articles

Identifying remnant biodiversity hotspots in Southern Asia reveals disequilibrium in mammalian communities

Identification of highly biodiverse areas has become a crucial step in protecting species richness, especially considering the rapid collapse of biodiversity and the limited funds available to avert, far less to reverse, these trends. Therefore, we aimed to identify the most important areas for the conservation of specified mammalian groups in Southern Asia, a region rich in biodiversity hotspots threatened by increasing rates of habitat loss and other anthropogenic activities. To achieve this, we modelled the occupancy of ungulates and of small, medium and large carnivorans at 20 study sites across the region and identified hotspots of species richness. We analysed the variation of estimated space use between different species groups and ranked areas according to their predicted importance for mammalian species conservation. Our results reveal a significant positive correlation in the spatial utilization patterns of competitive carnivores, yet no correlation among carnivores and their prey species, suggesting that anthropogenic impacts in the region are constraining species to coexist in only the few remaining suitable areas, superseding interactions between species guilds. Although the rank of site importance varied amongst species groups, we were able to identify a consensus on sites that are crucial for the conservation of all groups considered. Most of these top-ranking sites were located in the peninsular region of Thailand. We argue that, of the areas assessed, these sites represent the most important refuges for species conservation in the region, and their protection is critical for the maintenance of the biodiversity in Southern Asia.

Youth and Community Work for Climate Justice: Towards an Ecocentric Ethics for Practice

ABSTRACT This paper traces an expanded ethical perspective for youth and community work (YCW) practice in response to the climate and biodiversity crises. Discussing ecological ethics, we problematise the liberal humanist emphasis on utilitarianism and reject it as inappropriate for YCW in these times. Instead, we argue for an ecocentric practice ethic which intrinsically values the non-human world. To advance an ecocentric ethical perspective for YCW we draw on decolonial and posthuman theory. Inspired by a Freirean dialogical approach, we apply these theoretical domains as lenses to problematise YCW practice, seeking a generative dialogue between perspectives. Through this, we identify three emergent tasks for ecocentric YCW: (a) thinking and acting beyond the individual; (b) cultivating reciprocal care and connection and (c) practicing critical pedagogies of place. This third element builds on YCW's social pedagogic tradition and provides a practical means to incorporate ecocentric ideas into practice. We conclude that, given the unprecedented implications of climate crises and biodiversity collapse, a YCW ethics that does not consider these implications for young people is insufficient for the context of practice today. Enacting an ecocentric YCW ethics requires ongoing collective praxis and dialogue between young people, practitioners, educators, managers and students.

A safe agricultural space for biodiversity

Agriculture is the main driver of the rapid collapse of biodiversity, upon which all life on Earth, including agricultural production, depends. As we face the challenge of feeding a growing human population under a changing climate regime, the pressure on biodiversity is expected to further intensify. While the potential to expand and improve natural habitats for biodiversity conservation has been widely explored in large-scale scenarios of agricultural systems, the critical role of agricultural landscapes’ management on halting the loss of biodiversity remains unexplored at this scale. We argue that, to achieve an effective conservation of biodiversity (both natural and agricultural), the combined multivariate effects of agriculture on biodiversity must be accounted for, including its surface area as well as its management. Based on a literature review, we identified the main biodiversity pressures stemming from agriculture: land-use change, contribution to climate change, water withdrawal, pesticide pollution, nutrient (nitrogen and phosphorus) pollution, and landscape and farm-scale simplification (of croplands and pastures). For each one, we proposed a critical boundary, based on reviews of studies covering a range of taxa, biodiversity metrics, and biomes, below or above which negative impacts on biodiversity are minimized or positive effects arise. Implemented simultaneously, the identified boundaries would integrate biodiversity conservation within and across farmlands and minimize agriculture’s far-reaching impacts on biodiversity. We present a framework called “agricultural boundaries for biodiversity” that will allow to explore the potential of developing agricultural systems that effectively reconcile food production and biodiversity conservation at large scales.

Ocean climate and hydrodynamics drive decadal shifts in Northeast Atlantic dinoflagellates.

The abundance of large marine dinoflagellates has declined in the North Sea since 1958. Although hypotheses have been proposed to explain this diminution (increasing temperature and wind), the mechanisms behind this pattern have thus far remained elusive. In this article, we study the long-term changes in dinoflagellate biomass and biodiversity in relation to hydro-climatic conditions and circulation within the North Atlantic. Our results show that the decline in biomass has paralleled an increase in biodiversity caused by a temperature-induced northward movement of subtropical taxa along the European shelf-edge, and facilitated by changes in oceanic circulation (subpolar gyre contraction). However, major changes in North Atlantic hydrodynamics in the 2010s (subpolar gyre expansion and low-salinity anomaly) stopped this movement, which triggered a biodiversity collapse in the North Sea. Further, North Sea dinoflagellate biomass remained low because of warming. Our results, therefore, reveal that regional climate warming and changes in oceanic circulation strongly influenced shifts in dinoflagellate biomass and biodiversity.

Fixing food together: transitioning Ireland to a healthy sustainable food system – CHA position paper

Abstract Problem The Climate & Health Alliance (CHA) is a coalition of medical, health and advocacy organisations that seeks to highlight the significant health co-benefits of addressing the climate crisis. Our global food system contributes to diet-related chronic disease and has resulted in climate change, pollution, biodiversity collapse and nature loss. A healthy sustainable food system is needed to minimise interrelated obesity, climate change and malnutrition pandemics. Description of the problem The CHA conducted an extensive literature review to: 1. Demonstrate the need for a food system transition ; 2. Identify Ireland's challenge areas ; 3. Make recommendations for a healthy sustainable diet in the Irish context; 4. Recommend policy-level actions for Ireland. The CHA launched ‘Fixing Food Together’ in May 2023. We identified six challenge areas for Ireland: 1. Ending the junk food cycle; 2. Promoting transition to a more plant-based diet; 3. Harnessing the power of international and national guidelines; 4. Reducing food waste; 5. Improving agricultural practices and land use; 6. Using policy to affect behaviour change. Results The CHA presented individual-level recommendations for future Irish dietary guidelines, including breastfeeding, ultra-processed foods, protein foods and food waste. Seven policy recommendations were made: 1. National guidelines; 2. Regulations/laws; 3. Research, processing and technology actions; 4. Financial actions ; 5. Agricultural actions; 6. Public institution actions; 7. Public awareness actions Lessons ‘Fixing Food Together’ represents the first time a healthy sustainable diet and food system has been defined for an Irish context. The cross-sectional nature of the alliance provides a valuable consensus from its member organisations. It brings an often missing public health perspective to the climate and food systems dialogue. Key messages • Our current food system is harming human and planetary health. • ‘Fixing Food Together’ identifies Ireland’s challenge areas and makes recommendations to transition to a healthy sustainable food system.

Farm sustainability: a veterinary perspective

Background: Our planet is facing a catastrophic environmental crisis caused by climate change (with greenhouse gas emissions from agriculture accounting for around 10 per cent of the UK's total emissions), biodiversity collapse, species extinctions, food inequality and resource scarcity.Aim of the article: Farming is coming ever more under the spotlight for its environmental credentials and this article aims to explore the contribution of vets to the challenges ahead.

Editorial: Avian biodiversity collapse in the Anthropocene: drivers and consequences

Editorial: Avian biodiversity collapse in the Anthropocene: drivers and consequences

Connected Conservation: Rethinking conservation for a telecoupled world

The convergence of the biodiversity and climate crises, widening of wealth inequality, and most recently the COVID-19 pandemic underscore the urgent need to mobilize change to secure sustainable futures. Centres of tropical biodiversity are a major focus of conservation efforts, delivered in predominantly site-level interventions often incorporating alternative-livelihood provision or poverty-alleviation components. Yet, a focus on site-level intervention is ill-equipped to address the disproportionate role of (often distant) wealth in biodiversity collapse. Further these approaches often attempt to ‘resolve’ local economic poverty in order to safeguard biodiversity in a seemingly virtuous act, potentially overlooking local communities as the living locus of solutions to the biodiversity crisis. We offer Connected Conservation: a dual-branched conservation model that commands novel actions to tackle distant wealth-related drivers of biodiversity decline, while enhancing site-level conservation to empower biodiversity stewards. We synthesize diverse literatures to outline the need for this shift in conservation practice. We identify three dominant negative flows arising in centres of wealth that disproportionately undermine biodiversity, and highlight the three key positive, though marginalized, flows that enhance biodiversity and exist within biocultural centres. Connected Conservation works to amplify the positive flows, and diminish the negative flows, and thereby orientates towards desired states with justice at the centre. We identify connected conservation actions that can be applied and replicated to address the telecoupled, wealth-related reality of biodiversity collapse while empowering contemporary biodiversity stewards. The approach calls for conservation to extend its collaborations across sectors in order to deliver to transformative change.

The impact of climate change and biodiversity loss on the health of children: An ethical perspective.

The reality of human induced climate change is no longer in doubt, but the concerted global action required to address this existential crisis remains inexcusably inert. Together with climate change, biodiversity collapse is increasingly driving the emergence and spread of infectious diseases, the consequences of which are inequitable globally. Climate change is regressive in its nature, with those least responsible for destroying planetary health at greatest risk of suffering the direct and indirect health consequences. Over half a billion of the world's children live in areas vulnerable to extreme weather events. Without immediate action, the health of today's children and future generations will be compromised. We consider the impact of biodiversity collapse on the spread of infectious diseases and outline a duty of care along a continuum of three dimensions of medical ethics. From a medical perspective, the first dimension requires doctors to serve the best interests of their individual patients. The second dimension considers the public health dimension with a focus on disease control and cost-effectiveness. The neglected third dimension considers our mutual obligation to the future health and wellbeing of children and generations to come. Given the adverse impact of our ecological footprint on current and future human health, we have a collective moral obligation to act.

Realising rural economic transformation: Pathways to inclusive and sustainable prosperity in post-COVID-19 Asia

The world is adjusting to regain control over direct economic impacts of the COVID-19 pandemic. This adjustment is occurring whilst global collective action is also gearing up to tackle climate change, avert biodiversity collapse and redress unsustainable growth practices that featured in pre-Covid era global economic activity for decades. COVID-19 pandemic experience since December 2019 has been a period of pronounced anxiety and inspiration. Despite the angst of widespread calamity, and the loss of over six million lives, a coordinated global effort helped contain the impacts well short of initial predictions. Progress toward eliminating poverty, the central goal in rural economic transformation, has been set back by decades. The strength in organising — through social and business processes — marked the resilience endured. The recovery is patchy and uneven across individual nations, and the medium-term prospects remain contingent on the efficacy of funding essential human services and clear market bottlenecks. Bridging capacity constraints across the rural–urban continuum also remain a need to ease the regulatory burden as the world tackles widespread externalities of the past to create new growth opportunities.In this special issue, emerging and established academics from the Asian region and beyond,11These papers were drawn from presentations made at a conference organised by the Asian Development Bank Institute on ‘Rural economic transformation: embracing opportunities in better living in Asia’ held during 15–17 November 2021. All contributors are from Asian Development Bank member nations. draw insights from research and analysis on the challenges facing policy makers, businesses, and households in raising living standards and inspiring the pursuit of individual and social affluence during these uncertain but opportune times.

Effects of interactions between anthropogenic stressors and recurring perturbations on ecosystem resilience and collapse.

Insights into declines in ecosystem resilience and their causes and effects can inform preemptive action to avoid ecosystem collapse and loss of biodiversity, ecosystem services, and human well-being. Empirical studies of ecosystem collapse are rare and hampered by ecosystem complexity, nonlinear and lagged responses, and interactions across scales. We investigated how an anthropogenic stressor could diminish ecosystem resilience to a recurring perturbation by altering a critical ecosystem driver. We studied groundwater-dependent, peat-accumulating, fire-prone wetlands known as upland swamps in southeastern Australia. We hypothesized that underground mining (stressor) reduces resilience of these wetlands to landscape fires (perturbation) by diminishing groundwater, a key ecosystem driver. We monitored soil moisture as an indicator of ecosystem resilience during and after underground mining. After landscape fire, we compared responses of multiple state variables representing ecosystem structure, composition, and function in swamps within the mining footprint with unmined reference swamps. Soil moisture declined without recovery in swamps with mine subsidence (i.e., undermined), but was maintained in reference swamps over 8years (effect size 1.8). Relative to burned reference swamps, burned undermined swamps showed greater loss of peat via substrate combustion; reduced cover, height, and biomass of regenerating vegetation; reduced postfire plant species richness and abundance; altered plant species composition; increased mortality rates of woody plants; reduced postfire seedling recruitment; and extirpation of a hydrophilic animal. Undermined swamps therefore showed strong symptoms of postfire ecosystem collapse, whereas reference swamps regenerated vigorously. We found that an anthropogenic stressor diminished the resilience of an ecosystem to recurring perturbations, predisposing it to collapse. Avoidance of ecosystem collapse hinges on early diagnosis of mechanisms and preventative risk reduction. It may be possible to delay or ameliorate symptoms of collapse or to restore resilience, but the latter appears unlikely in our study system due to fundamental alteration of a critical ecosystem driver. Efectos de las interacciones entre los estresantes antropogénicos y las perturbaciones recurrentes sobre la resiliencia y el colapso de los ecosistemas.

Margins matter: the importance of field margins as avian brood-rearing habitat in an intensive agricultural landscape

Agricultural intensification has significantly impacted habitat structures in agricultural landscapes and is one of the main drivers of biodiversity decline, especially in farmland birds. Birds are considered to reflect well the trends in other biodiversity elements and are therefore often used as indicator species. We studied common pheasant (Phasianus colchicus) brood habitat use in a small-grain-dominated farmland in southern Finland. The broods significantly preferred field margins compared to their availability. The importance of field margins was underlined, as 68% of pheasant brood observations in grain fields were within a 25-m-wide zone from the field edge, despite the availability being only 40% of the field area. Our results support the idea that field margins and their proximity act as possible biodiversity reservoirs even in intensive farming systems. Increasing the amount of field margins can be an effective management method when aiming to improve success of common pheasant broods while simultaneously benefitting farmland biodiversity. Identifying key habitats and landscape features that allow the co-existence of biodiversity and effective food production is crucial when aiming to halt the ongoing biodiversity collapse.

Evaluation of animal and plant diversity suggests Greenland’s thaw hastens the biodiversity crisis

Rising temperatures can lead to the occurrence of a large-scale climatic event, such as the melting of Greenland ice sheet, weakening the AMOC and further increasing dissimilarities between current and future climate. The impacts of such an event are still poorly assessed. Here, we evaluate those impacts across megadiverse countries on 21,146 species of tetrapods and vascular plants using the pessimistic climate change scenario (RCP 8.5) and four different scenarios of Greenland’s ice sheet melting. We show that RCP 8.5 emission scenario would lead to a widespread reduction in species’ geographic ranges (28–48%), which is projected to be magnified (58–99%) with any added contribution from the melting of Greenland. Also, declines in the potential geographical extent of species hotspots (12–89%) and alterations of species composition (19–91%) will be intensified. These results imply that the influence of a strong and rapid Greenland ice sheet melting, resulting in a large AMOC weakening, can lead to a faster collapse of biodiversity across the globe.

Effects of isolated and combined exposures of Boana curupi (Anura: Hylidae) tadpoles to environmental doses of trichlorfon and ultraviolet radiation

The biodiversity collapse strongly affects the amphibian group and many factors have been pointed out as catalytic agents. It is estimated that several events in the amphibian population decline worldwide may have been caused by the interaction of multiple drivers. Thus, this study aimed to evaluate the stressful effects of the exposure to environmental doses of trichlorfon (TCF) pesticide (0.5 μg/L; and an additional 100-fold concentration of 50 µg/L) and ultraviolet radiation (UV) (184.0 kJ/m² of UVA and 3.4 kJ/m² of UVB, which correspond to 5% of the daily dose) in tadpoles of the Boana curupi species (Anura: Hylidae). The isolated and combined exposures to TCF happened within 24 h of acute treatments under laboratory-controlled conditions. In the combined treatments, we adopted three different moments (M) of tadpole irradiation from the beginning of the exposures to TCF (0 h – M1; 12 h – M2; and 24 h – M3). Then, we evaluated tadpole survival, change in morphological characters, induction of apoptotic cells, lipid peroxidation (LPO), protein carbonyl content (PCC), glutathione S-transferase (GST), non-protein thiols (NPSH), and acetylcholinesterase (AChE), as well as the induction of genomic DNA (gDNA) damage. UVB treatment alone resulted in high mortality, along with a high level of apoptosis induction. Both UVA, UVB, and TCF increased LPO, PC, and AChE, while decreased GST activity. Regarding co-exposures, the most striking effect was observed in the interaction between UVB and TCF, which surprisingly decreased UVB-induced tadpole mortality, apoptosis, and gDNA damage. These results reinforce the B. curupi sensitivity to solar UVB radiation and indicate a complex response in face of UVB interaction with TCF, which may be related to activation of DNA repair pathways and/or inhibition of apoptosis, decreasing UVB-induced tadpole mortality.

A century of anthropogenic river alterations in a highly diverse river coastal basin: Effects on fish assemblages

The global increase in human population is driving a continuous conversion of land to anthropogenic uses. This is a major threat to lotic ecosystems worldwide, as it compromises the biotic integrity and health of rivers and streams. Studies in the northern hemisphere have shown that the effects of urbanization on fish assemblages include decrease and/or loss of diversity and abundance of native species, and a proliferation of tolerant exotic species. Such effects have not been widely studied in developing countries like Chile, where urbanization has impacted several river ecosystems. Over decades, the lower zone of the Andalién River in Central Chile has gone over intense non-planned urbanization stemming from the city of Concepción, leading to several physical alterations. The native fish and lamprey fauna of this coastal river basin has been reported as very diverse, with a total of 16 native species. However, this fauna has been affected by multiple effects of different land uses and direct alterations in the riverbed. To study how these fish and lamprey assemblages have changed, this paper compiles records from 1919 to 2018 and analyzes them in relation to the direct and indirect anthropogenic alterations in the basin. The results show a significant reduction in richness and abundance of native species, with only nine species currently. The two migratory lampreys, one of them endemic (Mordacia lapicida), have been extirpated from the Andalién River basin. Conversely, the richness and distribution of introduced species has increased throughout the river basin. The invasive species Gambusia holbrooki, first registered in 1999, is currently the most abundant in the urban zone of the river. Although the more substantial direct alterations of the riverbed occurred in the lower areas, a steeper reduction in native species richness occurred in the middle areas subjected to a long history of agricultural and forestry land use. We suggest the loss of resilience of the river ecosystem, and that the collapse of biodiversity in this river system demonstrates the lack of urban planning and the inefficiency of environmental regulations in protecting native species and ecosystems with high conservation value in Chile.

The Value of Museums in Averting Societal Collapse

AbstractCurrent research suggests that societal collapse is in progress. The indicators of societal collapse include untenable economic inequality; the spread of authoritarian governments; the collapse of biodiversity; an economic system dependent on the fallacy of endless growth, consumption, and debt, and the failure of governments institutions to respond to these crises. This article explores the implications of societal decline for museums as civil society organizations, including an examination of the untapped potential of museums to contribute to the reimagining and transitioning to a new society in the face of collapse or possible extinction. Given the uncertainty of the world, collapse is not inevitable. Museums, as key civic and intellectual resources with ethical responsibilities, must now examine the meaning and value of their work. As institutions of the commons, belonging to and affecting the public at large, museums can commit to enhancing societal wellbeing and the durability of the more‐than‐human world. There is an important lesson in the history of museums, and that is their ability to learn and adapt as circumstances require. Urgent museum participation is now possible and essential.

Scientists' warning on population

Humanity must commit to transformative change on all levels in order to address the climate emergency and biodiversity collapse. In particular, stabilizing and ultimately reducing the human population size is necessary to ensure the long-term wellbeing of our species and other life on Earth. We show how this transition can be accomplished in an equitable framework that promotes human rights. Specifically, we issue a global appeal for women and men to have at most one child and call for policy-makers to implement population policies that improve education for girls and young women and ensure the availability of high-quality family-planning services.

Minimum costs to conserve 80% of the Brazilian Amazon

The protection of the Brazilian Amazon is essential to prevent the collapse of global biodiversity and minimize the negative impacts of climate change worldwide. However, there is currently no estimate of how much it costs to conserve most of this region. We report that maintaining ∼80% (3.5 million km2) of the region within conservation areas (conservation units and indigenous lands) would minimally cost around USD 1.7–2.8 billion a year in recurrent management and system-wide costs, plus an upfront investment of USD 1.0-1.6 billion for establishment costs. Building a sustainable and definitive conservation system to maintain the socioecological integrity of the world's most biodiverse region is still possible, but the window of opportunity to achieve one of the most significant conservation accomplishments in the history of humanity can be closed soon and – given the declining resilience of the region’s ecosystems – forever.

Where should China practice forestry in a warming world?

As a nature-based and cost-effective solution, forestation plays a crucial role in combating global warming, biodiversity collapse, environmental degradation, and global well-being. Although China is acknowledged as a global leader of forestation and has achieved considerable overall success in environmental improvements through mega-forestation programs, many negative effects have also emerged at local scales due to the planting of maladapted tree species. To better help achieve carbon neutrality and the new vision of an ecological civilization, China has committed to further increase forestation. However, where forestation lands and such efforts should really be located is not so well understood yet and agreed upon, especially in the face of rapid climate change. Based on an ensemble-learning machine, we predicted the spatial habitats (ecological niche) of the forest, grassland, shrubland, and desert under present and future climate conditions based on the natural climax vegetation distribution across China. We show that the potential forestation lands are mainly located in eastern China, which is east of the Hu Line (also known as the Heihe-Tengchong Line). Under future climate change, forests will shift substantially in the latitudinal, longitudinal, and elevational distribution. Potential forestation lands will increase by 33.1million hectares through the 2070s, mainly due to the conversions of shrub and grassland to forests along the Hu Line. Our prediction map also indicates that grassland rehabilitation is the universal optimal vegetation restoration strategy in areas west of the Hu Line. This analysis is consistent with much of the observed evidence of forestation failures and recent climate-change-induced forest range shifts. Our results provide an overview and further show the importance of adaptive science-based forestation planning and forest management.

The Extinguishing Democratic State of Law — The Collapse Environment and Society Without “Tomorrow”

The main objective of this article is to discuss and examine the rise of neoliberal public policies proposed by the current Brazilian Executive Branch, which favor specific layers aiming at particular and strictly economic interests, threatening in existential plan the life of those who occupy and need the environment through measures inconsistent with the Brazilian jurisdiction of flexibilization of protection policies, in emphasis, the environmental. In this way, the repercussions of these attitudes over time are evident and show themselves to be harmful, not only in the socio-environmental plan but also in the political and regimental structure itself, compromising and putting in jeopardy the directives of the Democratic State of Law in Brazil in the light of the Constitution of the Federative Republic of 1988 and of the international human rights charters to which the country is a signatory. The qualitative methodology will be employed, promoting a complex amount of information in its multiple facets and of the monographic procedure with a bibliographical survey in the fields of Law and Social Sciences. With this, the research brings reflections on the Sustainable Development Goals (SDGs) in the UN’s 2030 Agenda and the rupture of this path with structural reforms that are based on the regression, violation of rights, destruction of ecosystems with the very backing of the State or its omission, signaling the extreme urgency of changes for the sake of a future showing that there cannot be the exercise of citizenship and the affirmation of human rights where there is no democracy, which is based on the harmonization of the will of the majority and, especially, in the protection and respect for minorities, as well as there cannot be a human life without adequacy of the capitalist model in the molds of projects aimed at environmental sustainability. Therefore, having as a foundation the defense of the international and constitutional charters, the Social State, and the foundations of a fair, sustainable and egalitarian society. With this, the present study brings into evidence the current social reality in decline and the negligence in the face of environmental problems in conjunction with the anti-democratic attitudes of a country like Brazil, which is going through a moment of uncertainty and without expectation in the governmental summit itself, which requires reflection and debates for the implementation of public policies with measures to prevent the collapse of biodiversity, of the people and fauna that occupy these spaces and, finally, ensuring sustainable development in a fair way aiming not only at the survival of biosystems and living beings but in cooperation for the progress of mankind within a system that cherishes all forms of life.