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Genetic diversity affects ecosystem functions across trophic levels as much as species diversity, but in an opposite direction

Understanding the relationships between biodiversity and ecosystem functioning stands as a cornerstone in ecological research. Extensive evidence now underscores the profound impact of species loss on the stability and dynamics of ecosystem functions. However, it remains unclear whether the loss of genetic diversity within key species yield similar consequences. Here, we delve into the intricate relationship between species diversity, genetic diversity, and ecosystem functions across three trophic levels —primary producers, primary consumers, and secondary consumers— in natural aquatic ecosystems. Our investigation involves estimating species diversity and genome-wide diversity -gauged within three pivotal species-within each trophic level, evaluating seven key ecosystem functions, and analyzing the magnitude of the relationships between biodiversity and ecosystem functions (BEFs). We found that, overall, the absolute effect size of genetic diversity on ecosystem functions mirrors that of species diversity in natural ecosystems. We nonetheless unveil a striking dichotomy: while genetic diversity was positively correlated with various ecosystem functions, species diversity displays a negative correlation with these functions. These intriguing antagonist effects of species and genetic diversity persists across the three trophic levels (underscoring its systemic nature), but were apparent only when BEFs were assessed within trophic levels rather than across them. This study reveals the complexity of predicting the consequences of genetic and species diversity loss under natural conditions, and emphasizes the need for further mechanistic models integrating these two facets of biodiversity.

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Unhinged, an alliance: Creativecritical writing and ecstatic citations

This contribution will focus on creativecritical citational devices. We will position creativecritical writing in relation to scholarly research and the academic writing it typically results in, as well as performative writing and autotheory (a performative form in itself). Following Katherine McKittrick’s provocation “What if the practice of referencing, sourcing, and crediting … takes us outside ourselves?” (2021, p. 16), we understand creativecritical citational works as ecstatic: they stand outside themselves. At the same time, performative writing’s citationality creates an “affective alliance with writing itself” (Pollock, 1998, p. 94) – “affective alliance” being key in autotheory too. Ecstatic citations, then, allow text and voice to transcend themselves while opening up to these alliances, becoming other-like in the process. McKittrick names this as an unknowing and unhinging of the self (2021, p. 16). Similarly, Amy Hollywood describes “the self-shattering that occurs through identification with the lacerated textual other” (2002, p. 59). These creativecritical citational gestures imply an ecstatic merging with textualities and subjectivities that are radically different: historically (the anachronistic), existentially (the non-human) and even ontologically (the fictional). Putting all of this together, in this creativecritical contribution we will examine writing that becomes ecstatic, both in form and content, more self-expanding than self-reflective – luminous, slippery, weird.

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Method to Study Potential‐Induced Degradation of Perovskite Solar Cells and Modules in an Inert Environment

The efficiency of perovskite solar cells (PSCs) is advancing rapidly, yet their sensitivity to ambient conditions poses challenges. An additional degradation mechanism, potential‐induced degradation (PID), can emerge during field operation, but the understanding of PID within perovskite devices is limited. To exclude environmental stressors, this study is conducted in an inert environment at room temperature. PSCs and mini‐modules are subjected to a 324 h PID stress test at −1000 V, revealing relative efficiency losses of around 29% and 24% for the PSCs and mini‐modules, respectively, exposing subtle degradation differences. These degradation rates are notably lower than reported in the literature, suggesting possible additional degradation pathways arising from suboptimal encapsulation combined with ambient conditions. Subsequently, half of the stressed samples are subject to +1000 V for 523 h and recover to a reduced efficiency loss of 15% and 7.7% for the PSCs and module, respectively. In contrast, storing the stressed samples on the shelf increased the efficiency losses to 32% (PSCs) and 41% (module). Therefore, the post‐PID rates differ significantly between both groups, whereas both effects of voltage recovery and progressed degradation are more pronounced in modules compared to cells. This study contributes to a robust method for PID research.

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A qualitative exploration of professionals' perspectives on the implementation of reablement intervention programs in community care.

Reablement is considered a complex intervention due to its multicomponent, person-centered, holistic approach promoting older adults' active participation in daily activities. It is important to consider the unique context in which complex interventions are implemented, as contextual factors may interact and influence implementation outcomes. As part of the European TRANS-SENIOR project, this qualitative study aimed to gain insight into professionals' experiences with reablement implementation in Dutch community care. Using the Consolidated Framework for Implementation Research, four focus groups were conducted comprising 32 professionals. Two groups were formed: one at operational level, including therapists, nursing staff, social workers, and domestic support; and one at organizational/strategic level, including project leaders, managers, directors, municipality representatives and health insurers. Participating care organizations had at least 6 months of experience with deploying and implementing reablement. Findings reflected three themes: (1) strength of interdisciplinary collaboration; highlighting significance of sharing goals and beliefs, (2) integrating the reablement philosophy into the organization; underscoring managements role in fostering support across all organizational layers, and (3) achieving a culture change in the healthcare system; emphasizing current funding models impeding value-based care tailored to the individual's goals and needs. The results offer valuable insights for implementation of complex interventions, like reablement.

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Open Access