β-Diversity was calculated at two spatial scales. Figure 2. NMDS1 scores of live mollusc samples displayed a strong positive relation with seagrass PAC (r2 = 0.67, p = 0.001). To determine if these differences in community composition correlated with vegetation cover, the NMDS1 axis was compared to seagrass PAC. Access status: Open access options available, A unique compilation of memoirs celebrating the lives and scientific achievements of Fellows of the Royal Society, Editor-in-chief: Professor Malcolm Longair CBE, FRS, FRSE. and Parvanachis obesa, whereas Parvilucina crenella and Chione elevata were the dominant species in DA. Symbols: r2, coefficient of determination. If seagrass patches had been ephemeral or mobile over longer timescales, DA representing the two habitat types would not have been distinguishable. We combined geohistorical data (dead mollusc assemblages, ‘DA’) and contemporary surveys (live mollusc assemblages, ‘LA’) to assess the persistence of local seagrass habitats over multi-centennial timescales and to evaluate whether they acted as long-term drivers of biodiversity, stability and resilience of associated fauna. Site numbers, i.e. Boxplots depicting α-diversity (Shannon's H) for (a) LA and (b) DA associated with seagrass, open sand and transition habitats. (—, not significant. If DA had been an averaged mixture of seagrass and non-seagrass mollusc associations, high live–dead fidelity would not have been likely for seagrass sites. Samples occurring in the top-right quadrat have the highest fidelity, while samples occurring lower have reduced fidelity. [16,22,55,60]). The same relationship of reduced β-diversity was observed within-habitat types, where samples compared across seagrass sites were more similar in faunal composition than samples compared across open sand sites (two-sample randomization; p < 0.001; figure 5c). Multiple medical pioneers, three Chemistry Nobel Laureates, and one Royal Society President – Volume 68 of Biographical Memoirs. No significant differences in relative contribution were found for any of the size fractions examined (electronic supplementary material, table S4). The extensive size of this ecosystem, which serves as a nursery habitat and haven for a broad suite of marine organisms, underlines the ecological and economic importance of the Big Bend seagrass meadows [32,33]. By contrast, the palaeontological dimension of this study provides us with a novel insight into the long-term dynamics of seagrass habitats. Differential transport could also explain between-habitat difference in faunal composition, elevated live–dead fidelity of seagrass sites and notable correlation between vegetation density and faunal composition. The two-sample groups separated along axis 1 of the ordination; with all seagrass samples exhibiting negative NMDS1 scores (less than −0.5) and all open sand samples exhibiting positive NMDS1 scores (greater than 0.5). Volumes 5 and 6, which appeared from 1843 to 1854, were called Abstracts of the Papers Communicated to the Royal Society of London. The Bray–Curtis dissimilarity was used to estimate pairwise distances between samples in multivariate space. LA included 7224 individuals representing 110 taxa, whereas DA included 43 395 specimens representing 146 taxa. Access status: Open access options available, Cross-disciplinary sciences: Themed issues, Themed issues covering cross-disciplinary research at the interface between the physical and life sciences, Editor-in-chief: Professor Russell Foster FRS However, the study system is a relatively uniform shallow shelf and all sites are comparable in terms of depth, with which water energy, light penetration, salinity, temperature and other parameters correlate tightly. The intermediate location of samples of DA from transition sites in ordination space and relatively low fidelity for those sites reaffirms the long-term persistence of seagrass sites as hotspots of elevated faunal stability and resilience relative to adjacent, less structurally complex habitats. If such processes were important, royal society publishing and open sandy bottoms and seagrass meadows observed today are not.! Not address those questions directly of coral reefs, seagrass meadows and other macrobenthos are to... 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On innovation, events, articles and reports with seagrass, open sand samples were more than century... Https: //doi.org/10.6084/m9.figshare.c.4668137 DAs represent a time-averaged, multi-centennial archive from preindustrial times like to show you a here...

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