Nicolas Mouquet

Human activities are rapidly eroding the biodiversity of most ecosystems, threatening the myriad contributions they provide to nature and people. Protected areas are often seen as key management tools for their conservation. However, the lack of historical baselines hinders our ability to fully assess these declines and the extent to which protected areas can compensate for decades of human-mediated degradation. Using a Bayesian framework, we modelled 22 fish community contributions across 2,800 tropical reefs and predicted their levels under counterfactual scenarios to compare the relative benefits of marine protected areas (MPAs) and anthropogenic impacts on unprotected reefs. We show that human activities have significantly reduced fish biodiversity- and biomass-related contributions with, for example, a 120% decline in piscivore biomass, corresponding to a net loss of 19 kg per hectare of reef. In contrast, the benefits of MPAs appear comparatively low, with conservation efforts potentially offsetting only 5% of this decline. Ultimately, only old and fully protected areas provide marked benefits to nature and people. This suggests that even if we drastically increase our protection efforts across the ocean (30% coverage by 2030), we cannot expect short-term socio-ecological benefits to counterbalance a long history of human footprint. A desirable future for nature and people thus requires a paradigm shift in our relationship with ecosystems and their biodiversity, beyond MPA establishment.

Biodiversity can buffer ecosystem functioning against disturbances by allowing species to compensate for the functions lost through the extirpation of other species, a key process known as ecological insurance. Functional ecology has extended this idea by emphasising trait redundancy amongst species that help buffer core ecosystem functions. However, some functions might be supported only by species with distinct combinations of trait values, which are less likely to be redundant within local communities. Here, we present a new and widely applicable framework to quantify the spatial insurance of locally functionally distinct species amongst communities. Our framework characterises how communities can disproportionately insure (functional sources) or depend on (functional sinks) neighbour communities, a dual relationship that is not captured by traditional metrics of functional beta diversity. We illustrate the application of our framework at broad spatial scales for plants and birds, highlighting biogeographic patterns of functional sources and sinks. This trait‐based spatial perspective reveals functional vulnerability, as illustrated by bird communities where functional sources were disproportionately impacted by human activities. It also provides a new approach to identify regions that differ in potential resilience to environmental change and to inform conservation strategies grounded in spatial trait distributions, supporting the preservation of functional distinctiveness beyond a focus on local biodiversity metrics.

Scientific publishing is increasingly dominated by for-profit journals, which attract prestige and submissions through high impact factors (IF). While some of these partly reinvest in research and dissemination and can be considered academia-friendly, non-profit journals - those that fully reinvest revenue into the academic community - often struggle for visibility despite promoting more equitable publishing models. Using citation data from over 70,000 publications in ecology and evolution, we show that citation practices are siloed: for-profit journals disproportionately cite other for-profit journals, academia-friendly journals preferentially cite other academia-friendly journals, and non-profit journals likewise favor citations to non-profit sources. This asymmetry structurally reinforces the IF advantage of for-profit journals simply because they are dominant in the publishing system. To address this inequity, we propose a soft-power, low-risk approach of “strategic citation”. By deliberately choosing to cite relevant articles from non-profit journals when multiple references would be equally valid, researchers can contribute to increasing those journals’ visibility and IF. This approach preserves scientific rigor and does not restrict publishing choices, but adds a layer of ethical intentionality to citation practices. Strategic citation offers a practical, actionable lever for researchers to promote a more balanced and ethical publishing system that complements broader structural reforms.

On shallow rocky and coral reefs, cultural and recreational values, like aesthetics, are critical aspects of Nature’s Contributions to People (NCP) that support human well-being and provide billions of dollars in tourism revenue. Quantifying the aesthetic value of reef ecosystems and uncovering the conditions that enhance it could support NCP-based management. Here, we combine a global dataset of reef fish surveys, species-level aesthetic values, and causal modeling to assess the global status and drivers of reef fish assemblage aesthetic value. We find that aesthetic value is inherently linked to species richness, displaying a latitudinal gradient with peaks in the tropics, but varies strongly with the presence of exceptionally beautiful or less-beautiful species. Sea surface temperature, primary productivity, human gravity, and protection status are the strongest drivers of assemblage-level aesthetic value. Protection against human impacts consistently enhances aesthetic value by boosting taxonomic and phylogenetic diversity, and this effect is greatest in species-rich, tropical ecoregions. Economic development has little influence, indicating that low-income countries are not constrained from maintaining beautiful fish assemblages. Our results therefore suggest that marine protected areas (MPAs) can support multiple NCPs simultaneously, particularly in developing tropical countries. While we highlight the effectiveness of MPAs, given the low level of marine protection globally and the sensitivity of aesthetic value to environmental conditions, the beauty of the world’s reefs appears severely threatened. Aesthetic value should be immediately integrated into reef conservation and management plans.

Understanding how environmental and human pressures impact the temporal stability of fish community biomass on shallow reefs is essential for effective conservation and management. These pressures influence community stability directly, by affecting species’ stability and asynchrony in species’ fluctuations. However, their effects may also indirectly depend on the functional traits of the species composing the community, which remains poorly understood. Here, we examine both direct and indirect, trait-mediated effects of environmental variability and human impacts on species’ biomass stability and asynchrony in 215 Australian shallow reefs. These communities span a 10-degree sea surface temperature (SST) gradient and have been monitored over 14 years. Our results indicate higher asynchrony in tropical reefs owing to higher trait diversity and trait redundancy and higher species’ stability in colder, temperate communities owing to higher mean trophic level. Human impacts, through their negative effects on species’ stability and trait diversity, were the main destabilizing factor of fish community biomass. Temporal change in SST destabilized species’ biomass while increasing mean trophic level in fish communities. Overall, our findings show that a comprehensive analysis of the multiple facets of functional diversity is crucial to better understand and forecast the long-term stability of marine ecosystems under global change.