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A diversity of management and environmental factors influence weed seedbank community composition, yet the conditions under which each of these factors is an important driver of the weed seedbank are poorly understood. To investigate this relationship, we used a series of univariate and multivariate analyses to test associations between soil health, nematode community composition parameters, and the composition of the weed seedbank at 59 agricultural sites in the Prince Edward Island Soil Quality Monitoring (PEI SQM) Network spanning a range of land-use intensities and using potato (Solanum tuberosum L.) production systems as a case study. Land-use intensity is a nonstandard term that refers to increasing agricultural activity, including tillage and use of synthetic inputs to sustain high crop yield. Sites were classified into low, medium, and high land-use intensity categories based on frequency of potato cultivation in the past 10 yr. A total of 36 different weed species were found across all sites, and while neither seedbank density nor species richness was influenced by land-use intensity, community assemblage was. Seedbank communities at low land-use intensity sites were largely associated with grass weeds and other weakly competitive species, positively correlated with soil CO2 respiration and nematode community richness and diversity, and negatively correlated with the carbon to nitrogen ratio. In contrast, seedbank communities at medium and high land-use intensity sites were similar and composed of many highly competitive weedy species and correlated with the frequency of potato in the rotation and soil N and K, two commonly used soil fertility inputs. The absence of common agricultural weed species at low land-use intensity sites filtered by soil edaphic factors and abundance of neutral species despite past history of annual cropping suggest that these sites are not refuges for these species and may present a template for the design of weed seed–suppressive soils.
Steinernema carpocapsae is an entomopathogenic nematode with established efficacy against various agricultural pests. However, its impact on key lepidopteran pests, including Ostrinia furnacalis, Mythimna separata, and Spodoptera litura, remains underexplored, particularly at the pupal stage. This study evaluates the efficacy of the nematode through a combination of choice-based attraction assays, non-choice infection performance bioassays involving direct application to specific pupal body parts, and assessments of sublethal effects on adult survival and oviposition following pupal-stage exposure. S. carpocapsae exhibited a clear preference for pupae of all three pests over blank controls and for previously infected pupae over healthy pupae. When presented with different pupal genders, S. carpocapsae preferred female M. separata over males but showed no gender preference for O. furnacalis and S. litura. Infection performance varied by body part, with a higher infection performance on the abdomen and thorax compared to the head for O. furnacalis and S. litura, and on the abdomen over the thorax and head for M. separata. Adult survival probability was significantly lower when pupae were infected, and female oviposition was reduced when either member of a mating pair had been infected. These findings highlight the efficacy of S. carpocapsae as a promising biological control agent against these lepidopteran pests, particularly when targeting the pupal stage.
Although virtually all academics who study human ‘race’ agree that it is a social construct, members of the general public still commonly regard ‘race’ as a biological property (i.e. they think that ‘races’ are genetically distinct). Even though empirical data from genetics and other fields do not support biological conceptions of race, this erroneous viewpoint is widely held, suggesting that there are impediments to effective communication of the relevant science. Here, we suggest five such impediments: (1) belief in genetic determinism, together with an over-reliance on an essentialist view of human groups, (2) overly simplistic interpretation of biological inheritance, (3) belief in the naturalistic fallacy and the associated naturalization of non-biological variation among racialized groups, (4) failure of the academic and educational communities to take responsibility for teaching the science of ‘race’ and racism, and (5) apologism towards racist founders of academic fields, including the evolutionary sciences. We address how and why each of these factors supports the spread of racism and suggest strategies for containing this spread.
Bowmouth guitarfish (Rhina ancylostoma) is typically described in the literature as a coastal ray species that inhabits nearshore waters up to 70 m deep on the continental shelf, dwelling on or near the seafloor, primarily over sandy or muddy substrates and around coral reefs. However, the scientific monitoring programme aboard the Spanish and Seychellois tropical tuna purse seine fleets has documented 37 incidental captures of this species in open waters of the Indian Ocean, through onboard observers and electronic monitoring systems. All these captures occurred within the first 200 m of the water column, at locations where the maximum depth exceeded 2000 m. The study was conducted based on at-sea observations onboard the Spanish and Seychellois tropical tuna purse seine fleets operating in the Indian Ocean from 2017 to 2023. The observation coverage varied throughout this time-series, with more than 85% of fishing activity monitored since 2017. The interactions recorded were predominantly between January and May, and more frequent in the years 2018 and 2021. The captured individuals ranged from 150 to 250 cm in total length, with females recorded more frequently than males. These observations provide valuable insights into the large-scale movements of this neritic species beyond its typical coastal and inshore habitats in the Indian Ocean.
We investigated the coverage of childhood vitamin A supplementation (VAS) across India from 2005–2006 to 2019–2021 and further explored how it related to childhood mortality. Data collected from mothers through standard questionnaires during the latest three rounds of the National Family Health Survey (2005–2006, 2015–2016 and 2019–2021) were used. Information on VAS in children aged 9–35 months was available from 2015–2016 to 2019–2021. Information on VAS among children aged 9–59 months was available from 2005–2006 to 2015–2016. Childhood VAS coverage was determined nationally and subnationally (viz. individual states, geography, socio-demographic index and developmental groups). Nearly 40 % eligible children aged 9–59 months and 30 % eligible children aged 9–35 months missed VAS during recent times. But improvements in VAS coverage were noticed over the years: from 18·6 % (2005–2006) to 60·5 % (2015–2016) among children aged 9–59 months and from 64·5 % (2015–2016) to 71·2 % (2019–2021) among children aged 9–35 months. There were coverage disparities, with Western India documenting the highest and Northeastern India documenting the lowest coverage values. During simple linear regression analysis, childhood mortality between 1 and 5 years of age varied inversely as a function of VAS coverage among children aged 9–59 months, with the association being less pronounced in 2015–2016 (β = −0·47) than in 2005–2006 (β = −0·40). However, this relationship disappeared when we accounted for potential confounders (viz. childhood immunisation and socio-economic factors) through multivariate analysis, suggesting that the role of VAS in promoting childhood survival may be limited during present times.
The late Silurian to Early Devonian floras in the South China Block provide important evidence for the radiation of early land plants, including the well-known Posongchong Formation and Xujiachong Formation of Yunnan Province and the Pingyipu Group of Sichuan Province. However, some taxa in these stratigraphic units are described on the basis of limited specimens, or even a single and/or poorly preserved specimen, and need further investigation. The re-investigation of specimen PB6458 from the Xujiachong Formation at the Xujiachong section near Xujiachong Village, Qujing City, Yunnan Province, which is the holotype of Zosterophyllum spathulatum Li and Cai, 1977, reveals some new characters of its strobilus, sporophylls, and sporangia and denies its assignment to Zosterophyllum Penhallow, 1892. Instead, this specimen should be assigned to Adoketophyton subverticillatum (Li and Cai) Li and Edwards, 1992. This taxonomic revision extends the paleogeographic distribution of Adoketophyton Li and Edwards, 1992 and further enhances this genus as one of the index fossils of Lower Devonian non-marine strata in the South China Block.
Cultural evolution of traditional music around the world has been the subject of recent quantitative investigations. Researchers have explored cultural diffusion of music as well as patterns of geographic variation that may result. By comparison, less has been studied about the process of music diversification; in particular, under what circumstances music diversifies is yet to be understood. In this study, we examine possible factors that may facilitate music diversification, using data from folk songs in the Ryukyu Archipelago, south-western islands of Japan. For a quantitative analysis, we first transform the melody of each folk song, following an automated scheme, into a sequence of alphabets, which is then used to quantify the melodic dissimilarity between each pair of songs. Our particular interest is in the dissimilarity between putative sister songs, or songs that are inferred to have derived from a common origin, and factors that have positive or negative effects on it. Our results suggest that sister songs tend to diversify more when they are sung in different islands, probably as a result of one being transmitted from one island to another, and when they have come to be sung in different social contexts.
A variety of larvae and parthenitae of trematodes have been detected in gastropods in the intertidal zone in Japan. However, because of the difficulty associated with the morphological identification of these stages, they have rarely been identified to the species or higher taxonomic levels. In this study, trematodes of these stages were sampled from intertidal gastropods in the Japanese coastal regions and were identified to the species, genus, or family levels morphologically and molecularly to elucidate or predict their life cycles. Investigation of 17 gastropod species (682 individuals in total) from 14 localities led to the detection of trematodes in 47 individuals belonging to six snail species. The infected gastropods were morphologically identified as Nipponacmea fuscoviridis, Monodonta confusa, Trochus sacellum, Batillaria attramentaria, Littorina brevicula, and Purpuradusta gracilis. Our molecular analyses revealed that sporocysts, rediae, and metacercariae from the gastropods were divided into 14 species belonging to nine families: Philophthalmidae, Fellodistomidae, Gymnophallidae, Lepocreadiidae, Heterophyidae, Opisthorchiidae, Notocotylidae, Microphallidae, and Opecoelidae. These trematodes were thought to use fishes, octopuses, seabirds, and marine mammals as their definitive hosts. Marine organisms such as jellyfishes, crustaceans, and fishes are also thought to act as the second intermediate and paratenic hosts of few present trematode species. As for the other trematode species, DNA barcodes of trematodes from various marine organisms will also illuminate the life cycles in future.
The brachyurans Tehuacana tehuacana Stenzel, 1944 and Dromilites americana Rathbun, 1935 have historically been difficult to place in families. A reevaluation of type and referred material from several institutions suggests that the two species are referrable to separate genera in Palaeoxanthopsidae. Hyphalocarcinus new genus is erected to accommodate H. americanus new combination, and Tehuacana remains a distinct genus. Palaeoxanthopsidae evolved and radiated in the Atlantic Ocean, ranging from Late Cretaceous (Maastrichtian) to early Eocene (Ypresian) in age. This work adds to the known diversity of Palaeoxanthopsidae and demonstrates that the family survived and thrived in the Atlantic Ocean in the wake of the end-Cretaceous extinction. Differential preservation of specimens must be evaluated carefully when placing superficially similar taxa at the family, genus, and species level.
Increasing disease outbreaks and declining biodiversity underscore the need for understanding the impact pathogens have on wildlife populations. To understand how zoonoses impact wild animal welfare, we created a severity index. Using signs of disease information from a bacterial zoonotic disease database, we quantified severity of each sign of disease combined with the number of welfare domains and body systems the pathogen impacts to find the severity index value (SIV) of each unique host-pathogen relationship. We then investigated the effects of host-pathogen richness and conservation status against SIV. We found there to be a strong, negative correlation between increasing pathogen richness and SIV. Species of least concern (LC) were not significantly more likely to have higher SIV than species of conservation concern (CC), but CC species did not have a significant decline of SIV with increasing pathogen richness. This study provides an insight into the relationships between pathogen richness and the risk of pathogen infections to wildlife.
Diet in the first years of life is a key determinant of lifelong disease risk and is highly affected by socio-economic status (SES). However, the specific relation between SES and food consumption in toddlers and preschoolers is poorly understood. This study assesses SES-related differences in food consumption in 1- to 5-year-olds in Germany using weighed food records (3 + 1 d) of a subsample of 887 children from the cross-sectional Children’s Nutrition Survey to Record Food Consumption (KiESEL) undertaken between 2014 and 2017. Children were categorised as having a low, medium or high SES depending on parental income, education and occupation. A two-step generalised linear model corrected for age and sex was applied to assess differences in food consumption, using bootstrapping to address unequal group sizes. Differences between SES groups were found for unfavourable foods (and the subgroups sugar-sweetened beverages and confectionary/desserts), fruit, bread/cereals and fats/oils (PBoot < 0·05). Mean daily consumption in the low-SES group as compared with the high-SES group was 84 g lower for total fruit, 22 g lower for bread/cereals and 3 g lower for fats/oils, while being 123 g higher for sugar-sweetened beverages and 158 g higher for unfavourable foods in total (based on bootstrap 95 % CI). In conclusion, this study suggests a social gradient in the diet of German toddlers and preschoolers, with lower SES linked to lower diet quality. To prevent adverse health trajectories, public health measures to improve early life nutrition should address all children, prioritising those of lower SES.
Extensive damage to over 1000 plant species, including food crops, oil and industrial crops, vegetables, fruit trees, ornamentals, fodder species and weeds, has been caused by emerging phytoplasma-mediated diseases, thereby posing significant threat to global food security. Multiple factors, including environmental changes, invasion pathways, vector transmission and the emergence of new pathogen lineages, contribute to the spread of these diseases. Effective management requires stable, long-term strategies to safeguard plant health. Key approaches include comprehensive loss assessments, integration of climate change impacts, predictive modelling, enhanced disease surveillance, and improved detection techniques targeting phytoplasmas. This review highlights phytoplasma-associated plant diseases, emerging pathogen threats, and the factors facilitating their spread, alongside methods for surveillance and detection. In addition, case studies and global collaborative efforts are discussed. Finally, we outline future research priorities aimed at improving the management of phytoplasma-induced plant diseases.
The nematodes isolated from three species of Chanodichthys were completely consistent with the morphological description of Rhabdochona coronacauda. We provide new morphometric data for R. coronacauda, which slightly differ from those of the original description. For the first time, we performed a phylogenetic analysis by using both primary (linear) and secondary (folded structures) sequences of the complete 18S rRNA gene for three superfamilies of Spiruromorpha. The interspecific genetic distances within the genus Rhabdochona were 0.13%–3.06% between 18 species. Rhabdochona coronacauda was sister to a sub-group consisting of the type species R. denudata, R. hospeti, R. hellichi, and R. turkestanica. The secondary structures reconstructed for 35 species of three superfamilies from the order Spiruromorpha comprised 16 conformations of the region including helix 39 and expansion segment 9, and two conformations of helix 17. Helix 39 can be used to differentiate single species or separate species groups of Rhabdochona. The structures of helix 39 in both Rhabdochonidae and Cystidicolidae with Salmonema had an identical 39a domain but differed in the 39b domain and expansion segment 9. In addition, the structure of the helix 39–expansion segment 9 domain within and between families of different superfamilies and their resolution on the phylogenetic tree in combination did not correspond to the accepted classification of spiruromorph nematodes. Helix 17 did not differ within Rhabdochona, or between Rhabdochonidae and Cystidicolidae. At the superfamily level, helix 17 can distinguish Thelazioidea, Spiruroidea, and Habronematoidea from Rhabdochonidae, and Cystidicolidae from Spirocercidae, Thelaziidae, and Pneumospiruridae.
Cover crops (CCs) are a component of the integrated weed management strategies for controlling herbicide-resistant weed biotypes. A field study was conducted at Kansas State University Agricultural Research Center near Hays, KS, from 2021 to 2024 to determine the effect of spring-planted CCs in combination with residual herbicide on weed suppression during fallow phase and subsequent wheat yield in a no-till winter wheat (Triticum aestivum L.)–grain sorghum [Sorghum bicolor (L.) Moench]–fallow rotation in the semiarid Central Great Plains (CGP). The study site had a natural seedbank of glyphosate-resistant (GR) kochia [Bassia scoparia (L.) A.J. Scott] and Palmer amaranth (Amaranthus palmeri S. Watson). A mixture of CCs (oats [Avena sativa L.]–barley [Hordeum vulgare L.]–spring peas [Pisum sativum L.]) was spring-planted in no-till sorghum stubbles and terminated at the oats heading stage. Four treatments were tested: (1) weedy fallow (no CC and no herbicide), (2) chemical fallow (no CC but glyphosate + flumioxazin/pyroxasulfone + dicamba), (3) CC terminated with glyphosate, and (4) CC terminated with glyphosate + flumioxazin/pyroxasulfone. Across 3 yr, CC at termination reduced total weed density by 78% to 99% and total weed biomass by 93% to 99% compared with weedy fallow. Weed suppression by the CC terminated with glyphosate plus flumioxazin/pyroxasulfone continued for at least 90 d with reduced total weed density of 52% to 80% and total weed biomass reduction by 70% compared with weedy fallow across 3 yr. No differences in subsequent wheat grain yield between CC treatments and chemical fallow were recorded in 2021 to 2022 and 2022 to 2023; however, in 2023 to 2024, chemical fallow and CC terminated with glyphosate + flumioxazin/pyroxasulfone had greater wheat yield than CC terminated with glyphosate only. These results suggest that integration of spring-planted CC with residual herbicide may help suppress GR B. scoparia and A. palmeri in the CGP.
This meta-analysis assesses the relationship between vitamin D supplementation and incidence of major adverse cardiovascular events (MACE). PubMed, Web of science, Ovid, Cochrane Library and Clinical Trials were used to systematically search from their inception until July 2024. Hazard ratios (HR) and 95 % CI were employed to assess the association between vitamin D supplementation and MACE. This analysis included five randomised controlled trials (RCT). Pooled results showed no significant difference in the incidence of MACE (HR: 0·96; P = 0·77) and expanded MACE (HR: 0·96; P = 0·77) between the vitamin D intervention group and the control group. Further, the vitamin D intervention group had a lower incidence of myocardial infarction (MI), but the difference was not statistically significant (HR: 0·88, 95 % CI: 0·77, 1·01; P = 0·061); nevertheless, vitamin D supplementation had no effect on the reduced incidence of stroke (P = 0·675) or cardiovascular death (P = 0·422). Among males (P = 0·109) and females (P = 0·468), vitamin D supplementation had no effect on the reduced incidence of MACE. For participants with a BMI < 25 kg/m2, the difference was not statistically significant (P = 0·782); notably, the vitamin D intervention group had a lower incidence of MACE for those with BMI ≥ 25 kg/m2 (HR: 0·91, 95 % CI: 0·83, 1·00; P = 0·055). Vitamin D supplementation did not significantly contribute to the risk reduction of MACE, stroke and cardiovascular death in the general population, but may be helpful for MI. Notably, the effect of vitamin D supplementation for MACE was influenced by BMI. Overweight/obese people should be advised to take vitamin D to reduce the incidence of MACE.
Hydrothermal vents are known to host unique faunal assemblages supported by chemosynthetic production; however, the fauna associated with inactive sulphide ecosystems remain largely uncharacterised across the global seafloor. In November 2023, a six-rayed starfish was collected from the Semenov hydrothermal field on the Mid-Atlantic Ridge. A combination of morphological and molecular methods has confirmed the identity of this species as Paulasterias mcclaini Mah et al. 2015 (Forcipulatida: Paulasteriidae), providing the first validated record of this family in the Atlantic Ocean. We present an updated morphological description of the species, alongside phylogenetic analysis of the COI, 16S, 12S, and H3 genetic markers. The biogeography of the family is discussed, and previously published records amended.
This study examined whether supplementation with collagen peptides (CP) affects appetite and post-exercise energy intake in healthy active females. In this randomised, double-blind cross-over study, fifteen healthy females (23 (sd 3) years) consumed 15 g/d of CP or a taste matched non-energy control (CON) for 7 d. On day 7, participants cycled for 45 min at ∼55 % Wmax, before consuming the final supplement. Sixty-min post supplementation an ad libitum meal was provided, and energy intake recorded. Subjective appetite sensations were measured daily for 6 d (pre- and 30 min post-supplement) and pre (0 min) to 280 min post-exercise on day 7. Blood glucose and hormone concentrations (total ghrelin, glucagon-like peptide-1 (GLP-1), and peptide YY (PYY), cholecystokinin (CCK), dipeptidyl peptidase-4 (sDPP-4), leptin, and insulin) were measured fasted at baseline (day 0), then pre-breakfast (0 min), post-exercise (100 min), post-supplement (115, 130, 145, 160 min) and post-meal (220, 280 min) on day 7. Ad libitum energy intake was ∼10 % (∼41 kcal) lower in the CP trial (P = 0·037). There was no difference in gastrointestinal symptoms or subjective appetite sensations throughout the trial (P ≥ 0·412). Total plasma GLP-1 (AUC, CON: 6369 (sd 2330); CP: 9064 (sd 3021) pmol/l; P < 0·001) and insulin (+80 % at peak) were higher after CP (P < 0·001). Plasma ghrelin and leptin were lower in CP (condition effect; P ≤ 0·032). PYY, CCK and glucose were not different between CP and placebo (P ≥ 0·100). CP supplementation following exercise increased GLP-1 and insulin concentrations and reduced ad libitum energy intake at a subsequent meal in physically active females.
A new large dissorophid temnospondyl, Buxierophus pouilloni n. gen. n. sp., is described on the basis of a well-preserved adult skeleton found in the Lower Permian bituminous claystone of Buxières-les-Mines, a fossiliferous locality of the Bourbon-l’Archambault Basin (Allier, France). This new taxon, with a skull length of about 12 cm, is characterized by a unique combination of characters: dorsal midline series of osteoderms composed of two series of thin and unornamented osteoderms, some bearing conspicuous peaks dorsally; internal osteoderms with bi- or multi-lobed dorsal articulation surfaces; neural arches of the same length to that of the osteoderm. A phylogenetic analysis places Buxierophus pouilloni n. gen. n. sp. at the base of the Dissorophidae. This new dissorophid had a semi-aquatic lifestyle. It’s completely ossified ceratobranchial skeleton bears ceratobranchials with grooves as clear indication for its fish-like internal gills in adult stage. It represents the only Lower Permian dissorophid from Europe. Buxierophus n. gen. is part of a rich Permian fauna of the Buxières-les-Mines locality, which is considered as a relatively deep and large paleolake deposit.
Yiyang Dahegu rice (YyDHG) is an important agricultural specialty of Yiyang County, Jiangxi Province, and it is also a significant component of the local cultural and economic development. In this experiment, 89 samples of Dahegu rice (DHG) were collected from Jiangxi Province, including 52 samples of YyDHG and 37 samples of DHG from other regions within Jiangxi Province (oDHG). Comprehensive analysis was conducted using polyacrylamide gel electrophoresis, field phenotypic observation, population structure analysis and quality analysis. The results of variety identification indicated that the 89 samples actually comprised 52 distinct varieties, including 19 varieties of YyDHG. Population analysis has revealed rich genetic diversity among DHG varieties within Jiangxi Province, yet no significant subpopulation differentiation was observed between YyDHG and oDHG. Quality experiments demonstrated that YyDHG exhibits significant differences in appearance quality from oDHG, but no notable differences in milling quality or cooked taste and flavour. This suggests that the competitiveness of YyDHG in the market may not entirely depend on its unique quality characteristics, but rather more on its cultural value and brand effect. This experiment conducted a comprehensive analysis of the variety characteristics, genetic diversity and quality traits of YyDHG. Not only does it provide a scientific basis for the breeding and germplasm resource conservation of YyDHG, but it also holds positive implications for promoting the development of its industry.
Governments are increasingly implementing policies to improve population diets, despite food industry resistance to regulation that may reduce their profits from sales of unhealthy foods. However, retail food environments remain an important target for policy action. This study analysed publicly available responses of industry actors to two public consultations on regulatory options for restricting unhealthy food price and placement promotions in retail outlets in Scotland.
Design:
We conducted a qualitative content analysis guided by the Policy Dystopia Model to identify the discursive (argument-based) and instrumental (tactic-based) strategies used by industry actors to counter the proposed food retail policies.
Setting:
Scotland, UK, 2017–2019.
Participants:
N/A.
Results:
Most food and retail industry responses opposed the policy proposals. Discursive strategies employed by these actors commonly highlighted the potential costs to the economy, their industries and the public in the context of a financial crisis and disputed the potential health benefits of the proposals. They claimed that existing efforts to improve population diets, such as nutritional reformulation, would be undermined. Instrumental strategies included using unsubstantiated and misleading claims, building a coordinated narrative focused on key opposing arguments and seeking further involvement in policy decision-making.
Conclusions:
These findings can be used by public health actors to anticipate and prepare for industry opposition when developing policies targeted at reducing the promotion of unhealthy food in retail settings. Government action should ensure robust management of conflicts of interest and establishment of guidance for the use of supporting evidence as part of the public health policy process.