Search Results (61)

The interaction between bacteria and fungi is one of the key interactions of microbial ecology, including mutualism, antagonism, and competition, which profoundly affects the balance and functions of animal microbial ecosystems. This article reviews the interactive dynamics of bacteria and fungi in more concerned microenvironments in animals, such as gut, rumen, and skin. Moreover, we summarize the molecular mechanisms and ecological functions of the interaction between bacteria and fungi. Three major bacterial–fungal interactions (mutualism, antagonism, and competition) are deeply discussed. Understanding of the interactions between bacteria and fungi allows us to understand, modulate, and maintain the community structure and functions. Furthermore, this summarization will provide a comprehensive perspective on animal production and veterinary medicine, as well as guide future research directions. Full article

With the shift of the global innovation model from traditional closed-loop to open ecosystems, knowledge sharing and collaborative cooperation among firms have become key to obtaining sustainable competitive advantages. However, existing studies mostly focus on the static structure, and there is an insufficient exploration of the dynamic evolutionary mechanism and multi-party game strategies. In this paper, a two-dimensional analysis framework integrating the evolutionary game and the Lotka–Volterra model is constructed to explore the behavioral and strategic evolution of core enterprises, SMEs and the government in the innovation ecosystem. Through theoretical modeling and numerical simulation, the effects of different variables on system stability are revealed. It is found that a moderately balanced benefit allocation can stimulate two-way knowledge sharing, while an over- or under-allocation ratio will inhibit the synergy efficiency of the system; a moderate difference in the knowledge stock can promote knowledge complementarity, but an over-concentration will lead to the monopoly and closure of the system; and the government subsidy needs to accurately match the cost of the openness of the enterprises with the potential benefits to the society, so as to avoid the incentive from being unused. Accordingly, it is suggested to optimize the competition structure among enterprises through the dynamic benefit distribution mechanism, knowledge sharing platform construction and classification subsidy policy, promote the evolution of the innovation ecosystem to a balanced state of mutual benefit and symbiosis, and provide theoretical basis and practical inspiration for the governance of the open innovation ecosystem. Full article

This study examines the evolving relationship between online media coverage and protest movements by analyzing year-long demonstrations in Israel against Prime Minister Benjamin Netanyahu. Through comprehensive qualitative thematic analysis and content analyses of 219 online newspaper articles from five major Israeli newspapers; 324 social media posts across Facebook, Instagram, and Twitter; and 9 semi-structured interviews with protest leaders, this research identifies a gradual paradigm shift in protest representation in online media. The findings reveal a transition from the traditional “protest paradigm”—which frames protests as violent and remote through warlike discourse and visual distancing—toward an emerging “our protest paradigm”, characterized by rhetorical and visual proximity to protesters. This new paradigm manifests through personal testimonies in mainstream media and portrait photography on social media platforms, both creating a sense of closeness and accountability. The study further reveals a significant disconnect between protest leaders’ perceptions and legacy media, as leaders increasingly view traditional media as irrelevant despite their advisers’ recommendations to engage with it. Using polysystem theory as a theoretical framework, this research demonstrates how two media systems—legacy media and social media—operate with epistemological rigidity, challenging the previously established notion of “competitive symbiosis” between protesters and journalists. This investigation offers a novel analytical perspective through the lens of distance, illuminating how changing dynamics in online information transfer are reshaping protest coverage and production. The resulting paradigm model explains the coexistence of two simultaneous protest paradigms and provides valuable insights into the contemporary relationship between social movements, legacy media, and digital platforms in an evolving media ecosystem. Full article

Industrial symbiosis (IS) plays a crucial role in enhancing sustainability within industrial ecosystems by facilitating the exchange of waste, by-products, energy, and resources among different industries. This collaborative approach reduces resource consumption, minimizes waste generation, lowers disposal costs, and creates economic opportunities through synergistic relationships. This study focuses on the production of potassium nitrate (KNO₃) in the Escombreras industrial area in Spain, employing life cycle assessment (LCA) and life cycle cost analysis (LCC) to evaluate the impact of IS strategies. The ReCiPe method, implemented through SimaPro software and supported by market data from the Ecoinvent 3.8 database, is used for a comparative analysis between conventional KNO₃ production and improved technologies that promote circular economy principles. The LCA and LCC methodologies provide a comprehensive evaluation of both environmental and economic performance, considering key factors influenced by IS synergies. Results demonstrate significant environmental and economic benefits from the integration of IS into KNO₃ production, revealing the potential for improved sustainability and competitiveness through circular economy practices. This research provides valuable insights into how IS can enhance both environmental performance and cost-efficiency in industrial processes. These findings support the integration of IS as a viable pathway toward sustainable and cost-effective fertilizer production. Full article

A competition experiment between Vachellia gerrardii and invasive Nicotiana glauca Graham was conducted to assess the impact of Arbuscular Mycorrhizal Fungi (AMF) symbiosis on the inter and intraspecific competition between the two species. Seedlings were established under mono and mixed plantations with different species proportions (3:1, 2:2, 1:3) and plant densities (1, 2, 3, and 4 plants/pot) for mixed and mono planting respectively, with and without AMF. The vegetative growth parameters (height, leaf area and number, total dry weight/plant, relative yield, relative yield total), roots characteristics (length, surface area, volume, tips number), competitive interaction (aggressivity), and physiological traits (chlorophyll a, chlorophyll b, photosynthesis, stomatal conductance) were measured to evaluate plant responses to AMF symbiosis and competition. The results revealed that AMF symbiosis significantly enhanced the vegetative parameters (leaf area, height, and total dry weight) in both species under mono and mixed plantations compared to plants without AMF. Under AMF treatment, in the interspecific competition, most vegetative and root parameters of N. glauca were higher than V. gerrardii. At inoculant and species proportions, the relative yield of N. glauca exceeded that for V. gerrardii; however, N. glauca was more aggressive towards V. gerrardii. N. glauca root indices were higher than V. gerrardii under inter and intraspecific competition. Simultaneously, for both species, in monoculture plantations, most parameters decreased as plant density increased, wherein the decrease was higher for plants grown without AMF. Photosynthesis increased in AMF treatment, particularly for N. glauca. In conclusion, AMF promoted the growth of invasive N. glauca more than native V. gerrardii, particularly in terms of the root system. Our results provide a critical perspective that the AMF has the potential to contribute and facilitate the invasion of N. glauca, as well as support it with a competitive advantage over V. gerrardii, thus highlighting its potential role in shaping plant–plant interaction in invaded habitats. Full article

Mining activities cause strong soil alterations, such as heavy metal (HM) pollution, which decreases the diversity of plant communities and rhizospheric microorganisms, including arbuscular mycorrhizal (AM) fungi. The polymetallic Paramillos de Uspallata mine in the Andes Mountains, the first mining exploitation in Argentina, provides a unique scenario to study AM fungal resilience after long-term disturbance following over 40 years of inactivity. This study aimed to analyze mycorrhizal status and AM fungal communities in the mine and a nearby unexploited area and to evaluate their associations with soil parameters to elucidate life history strategies. Long-term exposure to elevated Fe, Pb, Zn, and Ag concentrations and high electrical conductivity (EC, 5.46 mS/cm) led to the dominance of Entrophospora infrequens in association with Pappostipa speciosa, demonstrating that this AM species is a stress-tolerant strategist in symbiosis with a pioneer perennial plant, resilient in the most impacted mine areas. In contrast, the unexploited area, with an EC of 0.48 mS/cm and low HM contents, supported competitive and ruderal species, revealing distinct ecological strategies of AM fungi in disturbed versus undisturbed environments. These findings highlight the potential of E. infrequens for bioremediation and ecological restoration in post-mining landscapes. Full article

Driving the coexistence of manufacturing and producer services by enhancing the synergistic effect of innovation and domestic demand has important practical significance for China in building a new development paradigm with domestic circulation as the mainstay and dual circulation as a complement. Based on the time-series input–output tables and using data from China’s A-share listed companies from 2007 to 2022, this paper selects manufacturing and producer services as research objects to empirically test the driving role of innovation, domestic demand, and their synergy in the co-development of these two industries. The results indicate that innovation, domestic demand, and their synergy positively drive the coexistence and development of the two industries. After addressing endogeneity issues and conducting multiple robustness checks, the results remain robust. Heterogeneity analysis reveals that the synergistic effect of innovation and domestic demand on the coexistence of manufacturing and producer services is more pronounced in emerging enterprises, high-tech enterprises, small-sized enterprises, highly competitive enterprises, and enterprises with a high labor income share. This study provides reliable empirical evidence for the coordinated development of enterprise innovation and domestic demand, as well as its economic consequences. They have practical significance for China in forming an industrial symbiosis model, promoting the development of the Fourth Industrial Revolution, and breaking the low-end lock-in in the value chain. Full article

The highly variable ’leafscapes’ of plants across the world represent billions of square metres of mite habitat. The phytoseiid mites (Acari: Phytoseiidae), an extremely species-rich group of mostly generalist predators, are providers of ecosystem services for humanity worth many hundreds of millions of dollars annually by helping suppress phytophagous mites and insects in forests, agro-ecosystems, shade-houses and home gardens. In this study, the phytoseiid mite assemblages on the leaves of four species of common tree species, namely oak (Quercus cerris var. cerris), poplar (Populus deltoides, P. nigra) and walnut (Juglans regia), were compared. The three data sets used were generated in three independent seasonal studies in Samsun Province, Türkiye, between 2018 and 2022. In total, mite species in 18 families, including 15 families on walnut, were recorded. Nineteen phytoseiid species in 13 genera, Amblydromalus, Amblyseius, Euseius, Kampimodromus, Neoseiulella, Neoseiulus, Paraseiulus, Phytoseius, Transeius, Typhlodromina, Typhlodromips, Typhlodromus and Typhloseiulus, were collected. Only Eusieus amissibilis was collected from all three tree genera, whereas 14 species were collected from only one tree genus. Shannon diversity and Jaccard similarity indexes were calculated for mite families and phytoseiid genera and species. Potential reasons for the observed differences in the phytoseiid assemblages on the different host trees are explored in depth. In the ‘big picture’, global biodiversity, likely including many undescribed phytoseiid species, is threatened by widespread habitat degradation and destruction, especially in the tropics, and accelerating climate change, and rapidly stopping them is imperative. Full article

The Hyphomicrobiales (Rhizobiales) order contains soil bacteria with an irregular distribution of the Calvin–Benson–Bassham cycle (CBB). Key enzymes in the CBB cycle are ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO), whose large and small subunits are encoded in cbbL and cbbS, and phosphoribulokinase (PRK), encoded by cbbP. These genes are often found in cbb operons, regulated by the LysR-type regulator CbbR. In Bradyrhizobium, pertaining to this order and bearing photosynthetic and non-photosynthetic species, the number of cbbL and cbbS copies varies, for example: zero in B. manausense, one in B. diazoefficiens, two in B. japonicum, and three in Bradyrhizobium sp. BTAi. Few studies addressed the role of CBB in Bradyrhizobium spp. symbiosis with leguminous plants. To investigate the horizontal transfer of the cbb operon among Hyphomicrobiales, we compared phylogenetic trees for concatenated cbbL-cbbP-cbbR and housekeeping genes (atpD-gyrB-recA-rpoB-rpoD). The distribution was consistent, indicating no horizontal transfer of the cbb operon in Hyphomicrobiales. We constructed a ΔcbbLS mutant in B. diazoefficiens, which lost most of the coding sequence of cbbL and has a frameshift creating a stop codon at the N-terminus of cbbS. This mutant nodulated normally but had reduced competitiveness for nodulation and long-term adhesion to soybean (Glycine max (L.) Merr.) roots, indicating a CBB requirement for colonizing soybean rhizosphere. Full article

Flooding is a critical factor that limits the establishment of a symbiosis between rice and arbuscular mycorrhizal fungi (AMF) in wetland ecosystems. The distribution of carbon resources in roots and the acclimation strategies of rice to flooding stress in the presence of AMF are poorly understood. We conducted a root box experiment, employing nylon sheets or nylon meshes to create separate fungal chambers that either prevented or allowed the roots and any molecules to pass through. We found that the mycorrhizal colonization rate and the expression of genes OsD14L and OsCERK1, which are involved in fungal perception during symbiosis, both increased in mycorrhizal rice roots following intermittent flooding compared to continuous flooding. Furthermore, AMF inoculation affected root morphological traits, facilitating both shallower and deeper soil exploration. Increased submergence intensity led to carbohydrate deprivation in roots, while high mycorrhizal colonization increased soil oxygen consumption and decreased the neutral lipid concentration in roots. However, mycorrhizal inoculation increased the rice photosynthesis rate and facilitated acclimation to submergence by mediating the expression of the genes OsCIPK15 and OsSUB1A to enhance rice shoot elongation and the sugar concentration in roots as a result of reduced competition for carbon between rice and AMF under different flooding conditions. Full article

The continuous and rapid development of global urbanization has brought great pressure to eco-environments. It is particularly serious in mega urban agglomerations, which determine the development process of urbanization in the world and affect the international competitiveness of countries. Taking the mega urban agglomerations with few research cases as the research area to explore the relationship between urbanization and eco-environment is vital to realize global sustainable development and optimize the development direction and trend of world urbanization. It is of great significance to assume the historical task of shifting the center of the world economy and the main position of the “Belt and Road” construction for China, and enhance its international competitiveness, as well as accelerate China’s high-quality development of new urbanization and the realization of ecological civilization. Previous studies mostly used the static coupling coordination degree (SCCD) model, which has limitations in describing complex interactions. This study used the dynamic coupling coordination degree (DCCD) model to analyze relationships in Beijing–Tianjin–Hebei urban agglomeration (BTH) from 2003 to 2019, which is one of China’s mega urban agglomerations. For the first time, we explain the progressiveness of the DCCD model from the construction concept, theoretically analyze the rising and falling laws of DCCD in break-in development stage, and propose the concepts of “benign transition” and “non-benign transition” when DCCD changes from break-in development to utmost development. Results show that BTH’s urbanization increased in fluctuation, with significant regional differences. The eco-environment was relatively good, but there are potential risks. The DCCD showed an S-shaped curve. Break-in development was the main type of DCCD. Moderate urbanization development and small degree of eco-environment sacrifice were necessary for “benign transition”. After the “benign transition” is realized, the high-level symbiosis of DCCD and the mutual promotion can be achieved through technical improvement. According to the identification results of the main controlling factors, the DCCD can be regulated by subsystems. Full article

Mulching is a widely used agricultural water conservation measure in the semiarid regions of Northwest China. In order to explore the response process of different film mulching methods to soil microorganisms, we characterized the effect of different film mulching methods on soil microbial diversity and community structure characteristics in the root zone of drip-irrigated maize during the heading and maturity stages using high-throughput sequencing of 16SrDNA and ITS amplicons combined with bioinformatics analysis. Full mulching (FM) was contrasted to controls of no mulching (NM) and half-mulching (HM), yielding an order of microbial diversity, abundance, and evenness scores of HM > FM > NM. The HM and FM treatments reduced the relative abundance of Proteobacteria and Actinobacteria (the most abundant bacteria) in the bacterial community structure but increased that of Acidobacteria and Chloroflexi. In the fungal community structure, HM decreased the abundance of Sordariomycetes but increased that of Eurotiomycetes (the most abundant fungi). The abundance and community structure of bacteria were significantly correlated with soil temperature and those of fungi with pH. HM improved network complexity and competitive relationships among bacteria, while FM increased the relationship between fungal groups and the symbiosis of fungal communities. HM significantly increased maize yield (20.37% and 6.01% above NM and FM, respectively). In summary, full mulching was more favorable than no mulching for soil microbial diversity and community structure composition, but soil microbial diversity and yield responded better to half-mulching. These results provide a background for improving the yield of drip-irrigated maize and protecting the microbial ecosystems of farmland soils. Full article

Tomato production in the Canary Islands has significantly decreased in recent years due to the presence of parasites and pathogens, poor-quality irrigation water, lack of infrastructure modernization, and increased competition. To address this issue, local varieties with better agro-climatic adaptation and organoleptic characteristics have been cultivated. These varieties show their maximum potential under an agro-ecological cultivation system, where the beneficial micro-organisms of the rhizosphere (in general) and mycorrhizal fungi (in particular) have a positive influence on their development, especially when the plants are subjected to biotic or abiotic stresses. Irrigation water in Canary Islands tomato cultivation comes from groundwater sources with moderate levels of sodium and chlorides or sodium and bicarbonates. This study evaluated the response of mycorrizal plants of the local tomato variety “Manzana Negra” under abiotic stress conditions due to the presence of chlorides and bicarbonates. Two tests were carried out with mycorrhizal and non-mycorrhizal plants. In the first one, 0, 75, and 150 mM NaCl solutions were applied. In the second, the nutrient solution was enriched with sodium bicarbonate at doses of 0, 2.5, 5, 7.5, 10, and 12.5 mM. Presence of native mycorrhizae improved the growth and nutrition of plants affected by irrigation with saline and alkaline water containing chloride and sodium carbonate. Symbiosis produced statistically significant increases in all plant-development-related variables (stem length and diameter; fresh and dry weight) in all bicarbonate concentrations. However, the results with the application of sodium chloride do not seem to indicate a positive interaction in most of the analytical parameters at 150 mM NaCl concentration. The mycorrhizal inoculation with local fungi can be interesting in the production of seedlings of this tomato variety in situations of moderate salinity, especially under bicarbonate stress conditions. Full article

In any city, various social groups coexist and need to have a harmonious symbiosis and optimise how people experience the city. The notion of urban planning incorporates positive city development that is active, socially sustainable, and inclusive. This study aims to identify whether the development of the Mediterranean city of Limassol, Cyprus extends to cover the needs of people with disabilities (PwD), residents, and tourists, emphasising physical impairments regarding the facilities and services provided. Limassol, Cyprus is an interesting case because recent developments aim to establish the city as a friendly living space with varied activities and services. Additionally, the city attracts tourists, and such development can be a competitive advantage as a tourism destination. Semi-structured interviews with PwD have been conducted to analyse their views, aiming to identify the extent to which existing infrastructure and services align with an inclusive model within the framework of sustainability, encompassing the notion of an active city. According to the findings, local government via municipal and tourism authorities should consider inclusivity in all aspects when re-developing urban settings by ensuring accessibility for PwD and offering more services that adhere to the requirements of an active, socially sustainable, and inclusive city. Full article

Ecological models of competition have provided great explanatory power regarding synonymy in derivational morphology. Competition models of this type have certainly shown their utility, as they have demonstrated, among other things, the relevance of frequency measures, productivity, compositionality and analyzability when comparing the development of morphological constructions. There has been less consideration of alternative models that could be used to describe the historical co-development of suffixes that produce words with sometimes similar forms or meanings but are not inevitably or solely in competition. The symbiotic model proposed in this article may help answer larger questions in linguistics, such as how best to analyze certain multilingual morphological phenomena, including the emergence of semantically similar forms within the same language. The present study demonstrates the importance of a diachronic approach in situations of near-synonymy, as an understanding of semantic similarity necessitates a review of the available historical record. In particular, our study focuses on the case of the suffix -eer (e.g., marketeer) in English, analyzing its origins, semantics, compositionality, and historical development, including its symbiotic relationship to the similar suffix -er (e.g., marketer). Full article