Homogeneous Community Research Articles

European river typologies fail to capture diatom, fish, and macrophyte community composition

Typology systems are frequently used in applied and fundamental ecology and are relevant for environmental monitoring and conservation. They aggregate ecosystems into discrete types based on biotic and abiotic variables, assuming that ecosystems of the same type are more alike than ecosystems of different types with regard to a specific property of interest. We evaluated whether this assumption is met by the Broad River Types (BRT), a recently proposed European river typology system, that classifies river segments based on abiotic variables, when it is used to group biological communities. We compiled data on the community composition of diatoms, fishes, and aquatic macrophytes throughout Europe and evaluated whether the composition is more similar in site groups with the same river type than in site groups of different river types using analysis of similarities, classification strength, typical species analysis, and the area under zeta diversity decline curves. We compared the performance of the BRT with those of four region-based typology systems, namely, Illies Freshwater Ecoregions, the Biogeographic Regions, the Freshwater Ecoregions of the World, and the Environmental Zones, as well as spatial autocorrelation (SA) classifications.All typology systems received low scores from most evaluation methods, relative to predefined thresholds and the SA classifications. The BRT often scored lowest of all typology systems. Within each typology system, community composition overlapped considerably between site groups defined by the types of the systems. The overlap tended to be the lowest for fishes and between Illies Freshwater Ecoregions.In conclusion, we found that existing broad-scale river typology systems fail to delineate site groups with distinct and compositionally homogeneous communities of diatoms, fishes, and macrophytes. A way to improve the fit between typology systems and biological communities might be to combine segment-based and region-based typology systems to simultaneously account for local environmental variation and historical distribution patterns, thus potentially improving the utility of broad-scale typology systems for freshwater biota.

Does the procedural act of electing leaders enhance cooperation in divided societies? Experimental evidence from Lebanon

Studies suggest that the procedural act of participating in an election in homogenous communities enhances social cooperation and compliance with policies proposed by the elected leader by making the leader more legitimate. In this study, we implement a lab-in-the-field experiment among Shia and Sunni Muslims in Lebanon to test whether participating in the procedural act of electing a leader increases cross-group cooperation also in ethnically heterogeneous communities. We find that participation in leader election fails to increase inter-group cooperation in a heterogeneous setting. In contrast, an appeal to a common ingroup identity successfully increases cooperation. When appeal to a supraordinate identity is combined with leader elections, cooperation increases only when out-group leaders are elected and among voters who value democratic procedure. Our findings suggest that in ethnically divided societies elections can lead to cooperation only if the dominant social norms are consistent with democracy and supraordinate group identity is salient.

A stochastic block Ising model for multi-layer networks with inter-layer dependence.

Community detection has attracted tremendous interests in network analysis, which aims at finding group of nodes with similar characteristics. Various detection methods have been developed to detect homogeneous communities in multi-layer networks, where inter-layer dependence is a widely acknowledged but severely under-investigated issue. In this paper, we propose a novel stochastic block Ising model (SBIM) to incorporate the inter-layer dependence to help with community detection in multi-layer networks. The community structure is modeled by the stochastic block model (SBM) and the inter-layer dependence is incorporated via the popular Ising model. Furthermore, we develop an efficient variational EM algorithm to tackle the resultant optimization task and establish the asymptotic consistency of the proposed method. Extensive simulated examples and a real example on gene co-expression multi-layer network data are also provided to demonstrate the advantage of the proposedmethod.

In the name of Belarusian nation-building: Children as national capital during the German occupation of Belarus (1941–1944)

The model of an ethnically homogeneous nation-state propagated from the mid-nineteenth century onwards was accompanied throughout Europe by the “discovery” by nation-states of their children as a national and political resource. Using children for the nationalist cause was a widespread phenomenon. Advocates of an independent Belarusian state were no exception in this respect. Under German occupation they saw an opportunity for their dream of an independent Belarusian nation-state to be fulfilled, a dream that rested on children as the repositories of values and at the same time the guarantors of national cohesion. The creation of a linguistically homogeneous national community was the first and crucial stage on the path to a nation-state. Children were to be molded into a loyal national community through education and a shared mother tongue. The article deals with a form of cooperation with the occupiers that was designed to harness children and youth as national capital and to raise them as members of a loyal national community.

Benefitting from the ambiguity: the issue of the ‘Turkishness’ of the Jewish minority in the first decade of the Turkish Republic

This article attempts to contextualize the situation of the Jewish community recognized as a minority group in the Treaty of Lausanne within a wider framework of Turkish nationalism during the first decade of the Republic. It will claim that the ruling elite of the Republic concurrently defined ‘Turkishness’ on inclusive and exclusive terms. While in theory, Turkish nationalism was a ‘civic’ nationalism defining ‘Turkishness’ based on citizenship, when it came to practice, all citizens of the Republic were not privy to this identity; some of them, especially Jews, were expected to prove their loyalty in order to become equal members of the nation. This article claims that the contradictory attitude of the ruling elite – keeping the definition of ‘Turkishness’ ambiguous – had the purpose of constructing a cohesive and homogenous national community. In line with this ambiguous definition of ‘Turkishness’, the ruling elite developed an ambivalent attitude towards non-Muslim minorities and their place in the nation and the Jews of Turkey were affected the most by this precarious attitude.

Petangan Jawa: Installing traditional values in names

This research contributes to investigate a cultural continuity, particularly naming practice, in a homogenous Javanese community installing Petangan Jawa (Javanese Calculations). However, common Javanese slowly ignore it. This study employs a descriptive qualitative approach with fieldwork to investigate the intention behind the name. Therefore, two varieties of Petangan Jawa, namely, a calculation based on calendar properties and a calculation based on Javanese script values, are still consistently used. In addition, this study paves the way for future research on the causes of the gradual abandonment of Petangan Jawa among common Javanese and how the perspective of religious beliefs about Petangan Jawa is used to predict the future.

Opening the canopy to restore spider biodiversity in protected oakwoods

A mosaic of patches in various successional stages is key to maintaining high biodiversity in open temperate woodlands. The abandonment of traditional management, such as once widespread coppicing, has caused biodiversity loss and a shift to ecologically homogeneous communities. Invertebrates are one of the taxonomic groups that suffered the most from the lack of a regular disturbance regime. Despite the obvious importance of active management in maintaining high biodiversity in open temperate woodlands, our knowledge on its contribution to spider conservation is still poor. We investigated how the coppicing restoration affects the diversity of ground-dwelling spiders in the oakwoods of Podyjí National Park in the Czech Republic. We sampled the spider assemblages using pitfall traps within 10 plots in three successional stages: initial, advanced, and late successional stage (control). We collected a total of 9 919 individuals belonging to 143 spider species. The species richness was positively influenced by restoration and reached the highest values in the advanced successional stage. Each successional stage hosted distinct spider assemblages. The trait diversity (RaoQ) was very low in the late successional stage, primarily accommodating small spider species with a preference for shaded and humid habitats. On the other hand, canopy thinning supported high trait diversity of light-demanding and threatened species. Our results showed that the restoration of traditional coppicing could be an appropriate tool for maintaining biodiversity of ground-dwelling spiders in open oakwoods.

Unanimity, Coexistence, and Rigidity: Three Sides of Polarization.

Political polarization is perceived as a threat to democracies. Using the Galam model of opinion dynamics deployed in a five-dimensional parameter space, I show that polarization is the byproduct of an essential hallmark of a vibrant democratic society, namely open and informal discussions among agents. Indeed, within a homogeneous social community with floaters, the dynamics lead gradually toward unanimity (zero entropy). Polarization can eventually appear as the juxtaposition of non-mixing social groups sharing different prejudices about the issue at stake. On the other hand, the inclusion of contrarian agents produces a polarization within a community that mixes when their proportion x is beyond a critical value xc=16≈0.167 for discussing groups of size three and four. Similarly, the presence of stubborn agents also produces a polarization of a community that mixes when the proportion of stubborn agents is greater than some critical value. For equal proportions of stubborn agents a along each opinion, ac=29≈0.22 for group size four against ac=14=0.25 for group size three. However, the evaluation of the proportion of individual opinion shifts at the attractor 12 and indicates that the polarization produced by contrarians is fluid with a good deal of agents who keep shifting between the two opposed blocks (high entropy). That favors a coexistence of opposite opinions in a divided community. In contrast, the polarization created by stubborn agents is found to be frozen with very few individuals shifting opinion between the two opinions (low entropy). That yields a basis for the emergence of hate between the frozen opposed blocks.

The association between <i>Candida albicans</i> sensitivity to antimycotic drugs and the architecture of their microbial community in the oropharynx of HIV infected patients

Relevance. Candida infection remains relevant due to the wide spread of antimycotic-resistant strains of Candida fungi, especially among immunocompromised individuals. It was previously discovered that the Candida spp. microbial community in the biotope of the oropharynx of HIV infected patients is characterized by a certain architecture: they can be present in this biotope in the form of a monoculture or as association of co-isolates. It has been suggested that the architecture of the Candida microbial community may influence their resistance to antimycotic drugs.
 Purpose a comparative study of the association between the architecture of the C. albicans microbial community in the oropharynx of HIV infected patients with oropharyngeal candidiasis and their sensitivity to antimycotic drugs.
 Materials and methods. A microbiological study of 52 isolates of Candida fungi (C. albicans, C. glabrata, C. tropicalis and C. krusei) from the oropharynx of 31 HIV infected patients with clinical manifestations of oropharyngeal candidiasis aged 20 to 69 years with almost equal gender distribution was carried out. In the form of monocultures, 18 isolates were isolated, while 34 were identified as co-isolates, which formed 16 homogeneous communities that included strains of the same species, and 18 heterogeneous ones that consisted of fungi of various species.
 Results. It was found that heterogeneous communities of C. albicans were markedly distinguished by sensitivity to antimycotic drugs, in particular, by low sensitivity to imidazoles. Homogeneous communities practically did not differ from monocultural ones. The general properties of the C. non-albicans population were largely similar to those of C. albicans, but were characterized by lower heterogeneity in response to antimycotic drugs.
 Conclusion. The architecture of the community of C. albicans isolated from the oropharynx of HIV infected patients with clinical manifestations of oropharyngeal candidiasis affects their sensitivity to antimycotic drugs. When selecting effective antimycotic therapy for such patients, it is necessary to take into account the structure of the Candida spp. community in the oropharynx.

PATHWAYS TO RADICALISM: EXAMINING ONLINE COMMUNITY AND POLITICAL PATHWAYS TO MORE RADICAL BELIEFS ON REDDIT

Recent research shows that “algorithmic radicalization” and “echo chambers”—the idea that recommendation algorithms on social media have a strong independent effect on radicalization and silo people into ideologically homogeneous communities—are not as prevalent nor influential as once feared. Yet, online political discourse is as toxic as ever while political misinformation continues to plague social media platforms. This begs the question: If algorithms aren’t encouraging radicalization, then what is producing it? Drawing from church-sect theory, this study interviews politically active Reddit users to better understand _how_ they arrived at their current media use, online engagement, and political beliefs. Results show that participants have a deep mistrust of mainstream media, leading them to seek alternative sources of political content. Reddit participation is also driven by a desire for “earnest” political discussions with like-minded individuals and cross-partisans, in part to “reject” partisan polarization. Despite engaging on more extreme subreddits, participants said their beliefs were unchanged, but that other Redditors had moved to more extreme beliefs over time. And, participants perceived their Reddit participation as necessary to _prevent_ radicalization and partisan polarization. Collectively, these results provide preliminary insight into the media and social/psychological pathways that could lead to online radicalization, providing an alternative explanation to algorithmic radicalization. This study also underscores the importance of interrogating the ecological pathways to radicalization for researchers and policy-makers; future interventions should account for attribution bias and the individual-level factors related to radicalization.

Evaluation the policy of establishment satgas gotong royong based on traditional village in handling COVID-19 in Denpasar City

The COVID-19 pandemic has had a wide impact on various fields of human life in the world. Efforts to deal with COVID in Indonesia have led to various policies both at the national and regional levels. Similarly, the policy for handling COVID-19 in the Province of Bali. One of the policies is the policy of establishing the SATGAS Gotong Royong based on traditional village. The policy in its implementation produces various achievements according to the conditions of the community in which the policy is implemented. The case in Denpasar City, as an urban city with high interaction of activities and human mobility, it is certainly different from other regencies in Bali with more homogeneous community conditions. This qualitative research with a case study approach wants to evaluate the policy of establishing the SATGAS Gotong Royong based on traditional village in handling COVID-19 in Denpasar City. This needs to be done as a form of supervision because no matter how good a new policy is, its success or failure will be known through an assessment called evaluation.

Trait‐based effects of plant invasion on floral resources, hoverflies and bees

AbstractPlant invasions can lead to homogeneous communities with decreased functional diversity. However, invasive plants, with various morphological and phenological traits, may drive pollinator communities in a less predictable, more complex way. They can promote pollinators compatible with their floral traits, while leaving others without foraging resources. Our observational study on 10 invasive herbaceous species applied a trait‐based approach to investigate plant invasion‐driven changes in floral resources, hoverfly and bee communities. We sampled invaded and non‐invaded (control) sites before and during the flowering of the invasive plants. We analysed the differences in floral traits between invasive and native plants, functional diversity and trait distributions of flower and pollinator communities between the invaded and control sites. Five invasive plant species differed from natives in floral traits. Plant invasion caused species‐specific changes in functional diversity and trait distributions of communities. For instance, invaded sites had a decreased functional diversity of hoverflies before flowering of invasive species, and larger hoverflies during flowering of invasive species compared with control sites. Smaller bees were associated with invasive plants with shallow flowers, while larger and long‐tongued bees were associated with two invasive species with restricted floral access. Similar to previous studies, pollinator traits showed mixed or neutral responses to plant invasion. This is probably due to the high integration capability of invasive plants into plant‐pollinator systems, or limitations in sampling, trait resolution, and unrevealed environmental factors. We provide recommendations for future studies to better understand the trait‐based community composition of flowering plants and pollinators.

Dismantling racist ideologies in nursing academia to enhance the success of students identifying as Black, Indigenous and students of colour.

Dismantling racist ideologies in nursing academia to enhance the success of students identifying as Black, Indigenous and students of colour.

Local Renewable Energy Communities: Classification and Sizing

The transition from the current energy architecture to a new model is evident and inevitable. The coming future promises innovative and increasingly rigorous projects and challenges for everyone involved in this value chain. Technological developments have allowed the emergence of new concepts, such as renewable energy communities, decentralized renewable energy production, and even energy storage. These factors have incited consumers to play a more active role in the electricity sector and contribute considerably to the achievement of environmental objectives. With the introduction of renewable energy communities, the need to develop new management and optimization tools, mainly in generation and load management, arises. Thus, this paper proposes a platform capable of clustering consumers and prosumers according to their energy and geographical characteristics to create renewable energy communities. Thus, this paper proposes a platform capable of clustering consumers and prosumers according to their energy and geographical characteristics to create renewable energy communities. Moreover, through this platform, the identification (homogeneous energy communities, mixed energy communities, and self-sufficient energy communities) and the size of each community are also obtained. Three algorithms are considered to achieve this purpose: K-means, density-based spatial clustering of applications with noise, and linkage algorithms (single-link, complete-link, average-link, and Wards’ method). With this work, it is possible to verify each algorithm’s behavior and effectiveness in clustering the players into communities. A total of 233 members from 9 cities in the northern region of Portugal (Porto District) were considered to demonstrate the application of the proposed platform. The results demonstrate that the linkage algorithms presented the best classification performance, achieving 0.631 by complete-ink in the Silhouette score, 2124.174 by Ward’s method in the Calinski-Harabasz index, and 0.329 by single-link on the Davies-Bouldin index. Additionally, the developed platform demonstrated adequacy, versatility, and robustness concerning the classification and sizing of renewable energy communities.

Unequal Inscriptions of the Hungry Ghosts (Yulan) Festival Celebrations as Intangible Cultural Heritage in Hong Kong

This paper delineates unequal inscriptions of the Yulan Festival, whether as national intangible cultural heritage (ICH) or local ICH, for different ethnic groups in Hong Kong. I argue that the authorised heritage discourse that underlies the inscription of the Yulan Festival is based on the fossilised imagination of ethnic traditions and identities. Classifying the Yulan Festival according to ethnic ritual traditions implies an assumption on the existence of a homogenous ethnic community and tradition, and seems to overlook the dynamic of ethnic tradition, as well as the hybrid and flexible nature of culture and identity. This authorised system has acknowledged and exaggerated differences between various ethnic traditions and has understated the importance of integrated practices, diversified, flexible, and hybrid practices, the changing ethnic complexity of local communities, as well as the subjective agency of individuals. A gap between what was practiced and what was institutionalised is noted, and individual agency is observed in negotiating the festival in relation to the institutionalised heritage designations.

Decomposition rate as an emergent property of optimal microbial foraging

Decomposition kinetics are fundamental for quantifying carbon and nutrient cycling in terrestrial and aquatic ecosystems. Several theories have been proposed to construct process-based kinetics laws, but most of these theories do not consider that microbial decomposers can adapt to environmental conditions, thereby modulating decomposition. Starting from the assumption that a homogeneous microbial community maximizes its growth rate over the period of decomposition, we formalize decomposition as an optimal control problem where the decomposition rate is a control variable. When maintenance respiration is negligible, we find that the optimal decomposition kinetics scale as the square root of the substrate concentration, resulting in growth kinetics following a Hill function with exponent 1/2 (rather than the Monod growth function). When maintenance respiration is important, optimal decomposition is a more complex function of substrate concentration, which does not decrease to zero as the substrate is depleted. With this optimality-based formulation, a trade-off emerges between microbial carbon-use efficiency (ratio of growth rate over substrate uptake rate) and decomposition rate at the beginning of decomposition. In environments where carbon substrates are easily lost due to abiotic or biotic factors, microbes with higher uptake capacity and lower efficiency are selected, compared to environments where substrates remain available. The proposed optimization framework provides an alternative to purely empirical or process-based formulations for decomposition, allowing exploration of the effects of microbial adaptation on element cycling.

Homogeneity vs. Heterogeneity: An Identity crisis of the communities in the Jiu Valley

The history of the Jiu Valley has gone through multiple stages that have polished the identity of the communities. The development of mine exploitation has attracted immigrants from all over the country and from abroad. This has led to the emergence of two types of local identity communities: the natives and the newcomers. The relations between them have influenced the strategies used in building their constitution of identity. This paper focuses on the idea that these two types of identity are directly responsible for the degree of community homogeneity. In this respect, the natives belonged to a homogeneous community, with one dominant source of collective identity, while the arrival of the newcomers transformed the community into a heterogeneous one, with pluralistic sources of identity. These aspects reflect in the identity narratives which can be found in the Jiu Valley nowadays. The analysis of these narratives shows a common history, filled with tension, negation, disappointment, and acceptance.

Factors in National Self-Designation of Slavic Muslims in the Montenegrin Sandžak

National fragmentation of Slavic Muslims in the Montenegrin area of the Sandžak region into Bosniaks and national Muslims was recorded in the last two population censuses in Montenegro, with minor differences in the two sets of results. Therefore, the following question emerges: what are the social and political factors, prevalent in the Montenegrin area of the Sandžak region, that drive national self-identification of Slavic Muslims in this region either towards Bosniakism (national Bosniaks) or national Muslimhood (national Muslims). In the Montenegrin sociopolitical discourse in the relevant period, the social constructs “Bosniak” and “Muslim” have been shaped so that the first ethnonym implies stronger national ties and the tendency to complete one’s national identity through identification with Slavic Muslims outside of Montenegro, while the second ethnonym is closer to Montenegrin state patriotism and the intra-Montenegrin state framework. Empirical material from relevant censuses shows that the tendency of Slavic Muslims in Montenegro to embrace national Bosniakism is not driven by actions of political elites, the proximity and influence of Bosnia, or the ethnic/pre-Islamic origin of this part of the Montenegrin population, but rather by the homogeneity of the population at the municipal level: national Bosniakism is more pronounced in confessionally homogeneous Muslim communities than in those municipalities where Slavic Muslims and Christians live side by side. This finding is interpreted from the perspective of symbolic interactionism: in the confessionally heterogeneous Montenegrin-Sandžak municipalities, we have witnessed self-censorship of Slavic Muslims in terms of their national self-designation, as a result of the need to preserve the positive perceptions held by their Christian fellow citizens. In confessionally homogeneous Muslim municipalities, this factor did not have a major impact, resulting in a significantly large-scale acceptance of national Bosniakism than in those local administrations in the Montenegrin part of the Sandžak region where Slavic Muslims live with the Christian population.

Above- and below-ground microbiome in the annual developmental cycle of two olive tree varieties.

The olive tree is a hallmark crop in the Mediterranean region. Its cultivation is characterized by an enormous variability in existing genotypes and geographical areas. As regards the associated microbial communities of the olive tree, despite progress, we still lack comprehensive knowledge in the description of these key determinants of plant health and productivity. Here, we determined the prokaryotic, fungal and arbuscular mycorrhizal fungal (AMF) microbiome in below- (rhizospheric soil, roots) and above-ground (phyllosphere and carposphere) plant compartments of two olive varieties 'Koroneiki' and 'Chondrolia Chalkidikis' grown in Southern and Northern Greece respectively, in five developmental stages along a full fruit-bearing season. Distinct microbial communities were supported in above- and below-ground plant parts; while the former tended to be similar between the two varieties/locations, the latter were location specific. In both varieties/locations, a seasonally stable root microbiome was observed over time; in contrast the plant microbiome in the other compartments were prone to changes over time, which may be related to seasonal environmental change and/or to plant developmental stage. We noted that olive roots exhibited an AMF-specific filtering effect (not observed for bacteria and general fungi) onto the rhizosphere AMF communities of the two olive varieties/locations/, leading to the assemblage of homogenous intraradical AMF communities. Finally, shared microbiome members between the two olive varieties/locations include bacterial and fungal taxa with putative functional attributes that may contribute to olive tree tolerance to abiotic and biotic stress.

Nowe obywatelstwo i patriotyzm na pograniczu kultur: międzykulturowy kontekst

The cultural diversification of states deconstructs the model of a homogenous national community, yet it requires the maintenance of the stability of democratic institutions in a situation where culturally different citizens are increasingly resistant to forced assimilation and subjugation. A multicultural state must actively protect the cultural identities of its citizens. Some dilemmas arise in the understanding of citizenship and patriotism, for which state multiculturalism and interculturalism at the level of an individual citizen become contextual references. Therefore, the subject of this article is the different types of new citizenship and patriotism, with model approaches to them. The author exposes multiculturalism, revealing the new citizenship and intercultural connotations of patriotism. She looks at these categories from a cultural borderland perspective. With reference to the pillars of coexistence identified on the basis of empirical research in this borderland, the author conceptualizes intercultural citizenship and patriotism. She also points to their multidimensional nature with an intercultural connotation. The author sees them as integrating factors of a culturally diverse society. Their national-cultural, identity, and community provenance gives an intercultural character to the integration process. Integration conceived in this way fosters the evolution of the nation-state into a heterogeneous national community operating within its borders.