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- Destination marketing organisations: envisioning a regenerative tourism operating modelPublication . Crabolu, Gloria; Torres-Delgado, Anna; Ribeiro, Manuel AlectorThis study critically evaluates Destination marketing organisations (DMOs) within the paradigm of regenerative tourism, shifting from conventional operating models primarily centred on marketing and economic growth to a regenerative-oriented framework. Building on the scarce tourism transition literature, this study integrates participatory normative scenario-building with the Three-Horizons framework in workshops with 26 DMO managers. It examines current DMO activities, identifies key operating characteristics, and explores how these align with either traditional or regenerative approaches. The findings highlight a need for DMOs to broaden their activities beyond traditional promotion, to include stewardship, management and regenerative marketing. Theoretically, this study contributes to advancing the understanding of regenerative tourism within DMOs, helping bridge the gap between its theoretical foundations and real-world practice. Methodologically, it provides a replicable and adaptable tool for participatory foresight in tourism governance. It contributes a manifesto offering actionable pathways to guide policymakers and DMOs in transitioning towards regenerative tourism futures.
- Prokaryotic community structure and auxin biosynthesis in early developmental stages of farmed atlantic nori (Porphyra spp.)Publication . Cortez, Francisco; Nanetti, Enrico; Chaves, Guilherme; Pereira, André C.; Caria Mendes, Madalena; Oliveira, Inês; Leuzzi, Daniela; Abreu, Helena; Martins, Margarida; Leite, Ricardo B.; Keller-Costa, Tina; Costa, RodrigoIntroduction: Algal-microbiome interactions are considered pivotal for host health and development. Current understanding of the diversity and function of algal-associated microorganisms in aquaculture settings remains limited, preventing the development of microbiome-based solutions for sustainable algal growth.Methods: We employed cultivation-dependent and -independent approaches to determine the structure of bacterial communities associated with farmed Atlantic Nori (Porphyra dioica and Porphyra umbilicalis) at early developmental stages. 16S rRNA gene amplicon sequencing and cultivation of bacterial symbionts were performed for algal and culturing water samples harvested from indoor photobioreactors at stages S1 (conchocelis cultures growing vegetatively), S2 (conchosporangia), and S3 (young blades).Results: The phyla Pseudomonadota (Alpha- and Gammaproteobacteria classes) and Bacteroidota were dominant in algal samples, followed by Planctomycetota, Actinobacteriota, and Verrucomicrobiota. At the phylotype level, these communities were highly structured throughout the host’s life cycle. Uncultivated lineages Sva0996 (Actinomycetota), OM190 (Planctomycetota), Pir4 (Planctomycetota), and the genera Blastopirellula, Algoriphagus, Hyphomonas, and Marinobacter, among others, were enriched in algal samples and presented significantly different abundances across developmental stages. In some cases (e.g., genera Aquimarina, Sulfitobacter, Maribacter, and Nonlabens), those changes were also observed in culturing water. Moreover, the genera Ensifer (Rhizobiaceae), Paraglaciecola (Alteromonadaceae), and the uncultivated lineages DEV007 (Verrucomicrobiota) and Pir4 (Planctomycetota) were consistently present in P. dioica and P. umbilicalis samples at multiple developmental stages. Several Porphyra-associated bacterial genera and putative novel species, mostly belonging to the families Roseobacteraceae, Flavobacteriaceae, and Alteromonadaceae were identified via cultivation. Many cultured members of the Porphyra microbiome produced the growth-promoting hormone auxin, particularly those belonging to the genera Alteromonas, Marinobacter, Sulfitobacter, Leucothrix, and Roseovarius.Discussion: This study unveils complex, phylogenetically distinct, and temporally structured bacterial communities possessing algal morphogenesis-inducing capacities during early developmental stages of Porphyra spp., highlighting the potential of microbiome-based interventions for sustainable growth of marine algae in aquaculture.
- Afar fossil shows broad distribution and versatility of paranthropusPublication . Alemseged, Zeresenay; Spoor, Fred; Reed, Denné; Barr, W. Andrew; Geraads, Denis; Wynn, Jonathan G.; Bobe, RenéThe Afar depression in northeastern Ethiopia contains a rich palaeontological and archaeological record, which documents 6 million years of human evolution. Abundant faunal evidence links evolutionary patterns with palaeoenvironmental change as a principal underlying force1 . Many of the earlier hominin taxa recognized today are found in the Afar, but Paranthropus has been conspicuously absent from the region. Here we report on the discovery, in the Mille-Logya research area, of a partial mandible that we attribute to Paranthropus, dated to between 2.5 and 2.9 million years ago and found in a well-understood chronological and faunal context. The find is among the oldest fossils attributable to Paranthropus and indicates that this genus, from its earliest known appearance, had a greater geographic distribution than previously documented2 . Often seen as a dietary specialist feeding on tough food, the range of diverse habitats with which eastern African Paranthropus can now be associated shows that this suggested adaptive niche did not restrict its ability to disperse as widely as species of Australopithecus and early Homo. The discovery of Paranthropus in the Afar emphasizes how little is known about hominin evolution in eastern Africa during the crucial period between 3 and 2.5 million years ago, when this genus and the Homo lineage presumably emerged.