Mineralogy

Harrell, James

doi:10.1002/9781444338386.wbeah21217.pub2

Cited by 29 publications

(27 citation statements)

References 1 publication

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“…To verify possible relationships among species pair occurrence we built Spearman correlation matrices and tested the correlation among the presence and absence of each species pair. The analyses were implemented with the functions "cor" and "cor.mtest" of the package "Hmisc" (Harrell, 2023).…”

Section: Discussionmentioning

confidence: 99%

Clonal propagation, scale dependent assembly, and nucleation drives natural regeneration in a restinga sandy coastal plain

Matias,

Demetrio,

da Silva

et al. 2024

Land Degrad Dev

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On the sandy coastal plains, environmental filters that limit seedling establishment and survival create a naturally heterogeneous landscape, formed by vegetation patches inserted in a matrix of bare sandy soil. The succession processes in these ecosystems depend on some pioneer species that facilitate the recruitment and survival of other species. Here, we evaluated the spatial pattern and changes of vegetation patches of restinga (i.e., coastal sandy plain vegetation) over one decade (2011–2021). The research was carried out in Alagoas State, Northeast of Brazil. We considered as patches the vegetation islands inserted in a matrix of bare sandy soil and applied methodologies of photointerpretation. Landscape metrics included patch area, edge, shape, and core area. To test the effect of landscape metrics on species occurrence and species richness per patch, we applied generalized linear models (GLM) with binomial and quasi‐Poisson distributions, respectively. We used the “betapart” package to evaluate the importance of turnover and nestedness as drivers of beta diversity among patches. Our data indicate that a key plant (Myrciaria floribunda), which can propagate by root suckers, initiates a succession process, creating regeneration nuclei, which seem to follow a deterministic succession pattern until the patch reaches 10 m2 in area. In the successional sequence, the patches grow and coalesce with neighboring patches. Species richness of patches presented an unimodal response to patch size. Overall, there is a greater contribution of species turnover to among‐patch beta diversity. However, for patches smaller than 10 m2, beta diversity was mostly driven by nestedness, reflecting a process of species addition to the growing patches. The succession pattern found in the study area should be considered for the formulation of nature‐based restoration models, expected to be more efficient and effective for ecosystems with similar environmental filters.

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Section: Discussionmentioning

confidence: 99%

Clonal propagation, scale dependent assembly, and nucleation drives natural regeneration in a restinga sandy coastal plain

Matias,

Demetrio,

da Silva

et al. 2024

Land Degrad Dev

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“…To explore associations in microbiota composition among different subjects, which encompassed patients, their corresponding healthy first-degree relatives (HFDRs), and unrelated healthy control subjects, we conducted principal coordinate analysis (PCoA) and PERMANOVA based on Bray Curties distance and unweighted Unifrac distance. Spearman correlation analysis was employed to assess relationships between serum markers, SCFA, and the differential taxa utilizing the Hmisc R package (Harrell Jr. and C., 2023).…”

Section: Discussionmentioning

confidence: 99%

Enhanced microbiota profiling in patients with quiescent Crohn’s disease through comparison with paired healthy first-degree relatives using fecal metagenomics and metabolomics

Chen,

Li,

Wang

et al. 2024

Preprint

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Prior studies indicate no correlation between gut microbiota of healthy first-degree relatives (HFDRs) of Crohn's disease (CD) patients and development of CD. Here, we utilized HFDRs as controls to examine the microbiota and metabolome in individuals with active (CD-A) and quiescent (CD-R) CD, thereby minimizing the influence of genetic and environmental factors. Compared to non-relative controls, the use of HFDR controls identified fewer differential taxa. Faecalibacterium, Dorea, and Fusicatenibacter were decreased in CD-R, independent of inflammation, and correlated with fecal SCFAs. Validation with a large multi-center cohort confirmed decreased Faecalibacterium and other SCFA-producing genera in CD-R. Classification models based on these genera distinguished CD from healthy individuals, and demonstrated superior diagnostic power than models constructed with markers identified using unrelated controls. Thus, decreased Faecalibacterium, Dorea, and Fusicatenibacter in CD-R likely contributed to disease relapse through reduced SCFA production, highlighting their potential as diagnostic markers and therapeutic targets for CD.

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“…The variables' importance ranking was determined by increased mean square error (%InMSE) and nodepurity percent (IncNodePurity). Finally, correlation matrices were analyzed to determine underlying drivers of the observed patterns, using the rcorr and corrplot functions of the R packages Hmisc (Harrell 2023) and corrplot (Wei T 2021), respectively.…”

Section: Discussionmentioning

confidence: 99%

Biochemical composition changes can be linked to the tolerance of four grassland species under more persistent precipitation regimes

Zi,

Reynaert,

Nijs

et al. 2023

Physiologia Plantarum

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Climate models suggest that the persistence of summer precipitation regimes (PRs) is on the rise, characterized by both longer dry and longer wet durations. These PR changes may alter plant biochemical composition and thereby their economic and ecological characteristics. However, impacts of PR persistence have primarily been studied at the community level, largely ignoring the biochemistry of individual species. Here, we analyzed biochemical components of four grassland species with varying sensitivity to PR persistence (Holcus lanatus, Phleum pratense, Lychnis flos‐cuculi, Plantago lanceolata) along a range of increasingly persistent PRs (longer consecutive dry and wet periods) in a mesocosm experiment. The more persistent PRs decreased nonstructural sugars, whereas they increased lignin in all species, possibly reducing plant quality. The most sensitive species Lychnis seemed less capable of altering its biochemical composition in response to altered PRs, which may partly explain its higher sensitivity. The more tolerant species may have a more robust and dynamic biochemical network, which buffers the effects of changes in individual biochemical components on biomass. We conclude that the biochemical composition changes are important determinants for plant performance under increasingly persistent precipitation regimes.

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Mineralogy

Cited by 29 publications

References 1 publication

Clonal propagation, scale dependent assembly, and nucleation drives natural regeneration in a restinga sandy coastal plain

Clonal propagation, scale dependent assembly, and nucleation drives natural regeneration in a restinga sandy coastal plain

Enhanced microbiota profiling in patients with quiescent Crohn’s disease through comparison with paired healthy first-degree relatives using fecal metagenomics and metabolomics

Biochemical composition changes can be linked to the tolerance of four grassland species under more persistent precipitation regimes

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