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Unveiling and advancing grassland degradation research using a BERTopic modelling approach

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Journal of Integrative Agriculture 2025年第03期 949-965页

作者： Tong Li Lizhen Cui Yu Wu Rajiv Pandey Hongdou Liu Junfu Dong Weijin Wang Zhihong Xu Xiufang Song Yanbin Hao Xiaoyong Cui Jianqing Du Xuefu Zhang Yanfen Wang School of Agriculture and food Sustainability The University of Queensland College of Life Sciences University of Chinese Academy of Sciences Agricultural Information Institute Chinese Academy of Agricultural Sciences Indian Council of Forestry research & Education centre for Planetary Health and food security School of Environment and Science Griffith University Institute of Marine Science and Technology Shandong University National Science Library Chinese Academy of Sciences Department of Information Resources Management School of Economics and Management University of Chinese Academy of Sciences Beijing Yanshan Earth Critical Zone National research Station University of Chinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences State Key Laboratory of Tibetan Plateau Earth System Science (LATPES) Institute of Tibetan Plateau Research Chinese Academy of Sciences

Grassland degradation presents overwhelming challenges to biodiversity, ecosystem services, and the socioeconomic sustainability of dependent communities. However, a comprehensive synthesis of global knowledge on the frontiers and key areas of grassland degradation research has not been achieved due to the limitations of traditional scientometrics methods. The present synthesis of information employed BERTopic, an advanced natural language processing tool, to analyze the extensive ecological literature on grassland degradation. We compiled a dataset of 4,504 publications from the Web of Science core collection database and used it to evaluate the geographic distribution and temporal evolution of different grassland types and available knowledge on the subject. Our analysis identified key topics in the global grassland degradation research domain, including the effects of grassland degradation on ecosystem functions, grassland ecological restoration and biodiversity conservation,erosion processes and hydrological models in grasslands, and others. The BERTopic analysis significantly outperforms traditional methods in identifying complex and evolving topics in large datasets of literature. Compared to traditional scientometrics analysis, BERTopic provides a more comprehensive perspective on the research areas,revealing not only popular topics but also emerging research areas that traditional methods may overlook, although scientometrics offers more specificity and detail. Therefore, we argue for the simultaneous use of both approaches to achieve more systematic and comprehensive assessments of specific research areas. This study represents an emerging application of BERTopic algorithms in ecological research, particularly in the critical research focused on global grassland degradation. It also highlights the need for integrating advanced computational methods in ecological research in this era of data explosion. Tools like the BERTopic algorithm are essential for enha

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Development of a sample preparation approach to measure the size of nanoparticle aggregates by electron microscopy

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Particuology 2019年第4期17卷 49-57页

作者： Agnieszka Dudkiewicz Angela Lehner Qasim Chaudhry Kristian Molhave Guenter Allmaier Karen Tiede Alistair B.A. Boxall Peter Hofmann John Lewis The food and Environment research Agency Sand Hutton York Y041 1LZ UK Department of Environment The University of York Heslington York YO10 5DD UK National centre for food Manufacturing The University of Lincoln Holbeach PE12 7AG UK research Group Bio- and Polymer Analysis Institute of Chemical Technologies and Analytics TU Wien (Vienna University of Technology) Getreidemarkt 9 A-1060 Vienna Austria University of Chester Parkgate Road Chester CH1 4BJ UK Department of Micro and Nanotechnology Technical University of Denmark DTU Bldg 345b Lyngby 2800 Denmark research centre for global food security and ecosystems University of Hohenheim Wollgrasweg 43 70155 Stuttgart Germany Department of Geoinformatics - Z.GIS University of Salzburg Schillerstr. 30 A-5020 Salzburg Austria

Electron microscopy (EM) is widely used for nanoparticle (NP) sizing. Following an initial assessment of two sample preparation protocols described in the current literature as"unperturbed", we found that neither could accurately measure the size of NPs featuring a broad size distribution, e.g., aggregates. Because many real-world NP samples consist of aggregates, this finding was of considerable concern. The data showed that the protocols introduced errors into the measurement by either inducing agglomeration artefacts or providing a skewed size distribution towards small particles (skewing artefact). The focus of this work was to develop and apply a mathematical refinement to correct the skewing artefact. This refinement provided a much improved agreement between EM and a reference methodology, when applied to the measurement of synthetic amorphous silica NPs. Further investigation, highlighted the influence of NP chemistry on the refinement. This study emphasised the urgent need for greater and more detailed consideration regarding the sample preparation of NP aggregates to routinely achieve accurate measurements by EM. This study also provided a novel refinement solution applicable to the size characterisation of silica and c让rate-coated gold NPs featuring broad size distributions. With further research, this approach could be extended to other NP types.

关键词： Nanoparticles Aggregates Measurement Electron microscopy Sample preparation Artefacts

Evaluation of a <i>Brassica napus</i>Auxin-Repressed Gene Induced by Flea Beetle Damage and <i>Sclerotinia sclerotiorum</i>Infection

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American Journal of Plant Sciences 2017年第8期8卷 1921-1952页

作者： Limin Wu Min Yu Jennifer Holowachuk Andrew Sharpe Derek Lydiate Dwayne Hegedus Margaret Gruber InnoTech Alberta Vegreville Canada Saskatoon research centre Agriculture and Agri-Food Canada Saskatoon Canada global Institute for food security University of Saskatchewan Saskatoon Canada

Biotic stresses negatively affect canola growth and production. Flea beetle damage and Sclerotinia sclerotiorum (S. sclerotiorum) infection are two of the worst biotic stresses for canola. Auxin Repressed Proteins (ARPs) responsive to several abiotic stresses have been reported. However, information about ARPs induced by Flea beetle damage and S. sclerotiorum infection, their roles in biotic stress tolerance are still lacking in canola. ESTs for an Auxin Repressed Protein 1 (BnARP1) were highly represented (expressed) in a Brassica napus subtractive library developed after leaf damage by the crucifer flea beetle (Phyllotreta cruciferae). Expression of this gene was under different developmental control in B. napus, and it was co-induced in B. napus by flea beetle feeding, S. sclerotiorum infection, drought and cold. A total of 25 BnARP genes were represented in different B. napus stress and development EST libraries and indicated larger, diversified families than known earlier. Dwarf phenotypes, primary root growth inhibition, lateral root enhancement, reduced sensitivity to 2, 4-D, and reduced PIN1 and LOX expression in transgenic Arabidopsis expression lines suggest that BnARP1 is an auxin repressor that prevents auxin transport and supports an interaction between the auxin and jasmonate signalling pathways. And the increased survival after S. sclerotiorum infection in transgenic over-expression Arabidopsis suggests that BnARP1 could play a role in S. sclerotiorum tolerance through connecting auxin and jasmonate signalling pathways.

关键词： BnARP Brassica napus Flea Beetle S. sclerotiorum

Role of conspecifics and personal experience on behavioral avoidance of contaminated flowers by bumblebees

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Current Zoology 2019年第4期65卷 447-455页

作者： Bertrand Fouks Emily G. Robb H. Michael G. Lattorff lnstitut fur Biologie Molekulare Okologie Martin-Luther-Universitat Halle-Wittenberg Hoher Weg Halle (Saale) Germany centre for Ecological and Evolutionary Synthesis (CEES) Department of Biosciences University of Oslo Oslo Norway Microbes and Pathogens Biology The Institute for Global Food Security School of Biological Sciences Queen's University Belfast United Kingdom lnternational centre of Insect Physiology and Ecology (ICIPE) Nairobi Kenya German centre for Integrative Biodiversity research (iDiv) Halle-Jena-Leipzig Deutscher Platz Leipzig Germany

Pollinators use multiple cues whilst foraging in eluding direct cues from flowers and in direct cues from other pollinators. The use of indirect social cues is common in social in sects, such as honeybees and bumblebees, where a social environment facilitates the ability to use such cues. Bumblebees use cues to forage on flowers according to previous foraging experiences. Flowers are an essential food source for pollinators but also pose a high risk of parasite infection through the shared use of flowers leading to parasite spillover. Nevertheless, bumblebees have evolved behavioral defense mechanisms to limit parasite infection by avoiding contaminated flowers. Mechanisms underlying the avoidance of contaminated flowers by bumblebees are poorly understood. Bumblebees were recorded having the choice to forage on non-contaminated flowers and flowers contaminated by a trypan osome gut parasite, Crithidia bombi. The use of different treatments with presence or absence of con specifics on both con taminated and non-contami nated flowers allowed to investigate the role of social visual cues on their pathogen avoidance behavior. Bumblebees are expected to use social visual cues to avoid contaminated flowers. Our study reveals that the presence of a con specific on flowers either con taminated or not does not help bumblebee foragers avoiding contaminated flowers. Nevertheless, bumblebees whereas gaining experie nee tend to avoid their con specific when placed on contami nated flower and copy it whe n on the non-contami nated flower. Our experime nt suggests a detrime ntal impact of floral see nt on disease avoidanee behavior.

关键词： Host-parasite in teractions social learning pollinators inadvertent social information behavioral immunity copying behavior

Micro-sonic sensor technology enables enhanced grass height measurement by a Rising Plate Meter

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Information Processing in Agriculture 2019年第2期6卷 279-284页

作者： D.McSweeney N.E.Coughlan R.N.Cuthbert P.Halton S.Ivanov Teagasc Animal&Grassland Research and Innovation CentreMooreparkFermoyCo.CorkIreland Telecommunications Software&Systems Group Waterford Institute of TechnologyWaterfordIreland Institute for global food security School of Biological SciencesQueen’s University BelfastMedical Biology Centre97 Lisburn RoadBelfast BT97BLNorthern IrelandUnited Kingdom True North Technologies Unit 14Shannon Business CentreShannonCounty ClareIreland

globally,the Rising Plate Meter(RPM)is a device used to measure compressed sward height,to enable estimation of herbage *** improved farm management practices aided by a variety of technological advances,the standard design of a RPM has remained relatively ***,however,a RPM utilising a micro-sonic sensor,with digital data capture capability via a Bluetooth communications link to a smart device application,has been ***,we assess the comparable ability of both a standard cumulative ratchet counter RPM and the micro-sonic sensor RPM,to accurately and precisely measure fixed ***,as correct allocation of grazing area requires accurate geolocation positioning,we assess the associated GPS *** micro-sonic sensor RPM was significantly more accurate for height capture than the cumulative ratchet counter ***,across all heights,the cumulative ratchet counter RPM underestimated height by 7.68±0.06mm(mean±SE).Alternatively,the micro-sonic sensor RPM overestimated height by 0.18±0.08 *** relation to a practical applications,these discrepancies can result in an under-and overestimation of dry matter yield by 13.71%and 0.32%kilograms per hectare,*** performance of the on-board GPS did not significantly differ from that of a tertiary ***,the wireless technology,integrated mapping,and decision support tools offered by the innovative micro-sonic sensor RPM provides for a highly efficacious grassland management tool.

关键词： Decision support systems Dry matter yield Grassland Rising plate meter Precision agriculture Wireless sensor network

Towards informed metrics for examining the role of human-induced animal responses in tag studies on wild animals

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Integrative Zoology 2019年第1期14卷 17-29页

作者： Rory P.WILSON Mark HOLTON Vianney LWILSON Richard GUNNER Brenda TYSSE Gwendoline IWILSON Flavio QUINTANA Carlos DUARTE D.Michael SCANTLEBURY Biosciences Swansea UniversitySingleton ParkSwanseaWalesUK Department of Geography Swansea UniversitySingleton ParkSwanseaWalesUK Instituto de Biología de Organismos Marinos(IBIOMAR) CONICETPuerto MadrynChubutArgentina Red Sea research centre King Abdullah University of Science and TechnologyThuwalSaudi Arabia School of Biological Sciences Institute for Global Food SecurityQueen’s University BelfastBelfastUK

Two prime issues can detrimentally affect animals that have been equipped with tags:(i)the effect of the cap-ture and restraint process;and(ii)the effect of the tag *** work examines some of the issues surround-ing quantification of tag effects on wild animals for both restrained and free-living animals.A new method to quantify stress effects based on monitoring ventilation rates in relation to activity is suggested for restrained an-imals which may help improve the practice of handling *** is also suggested that various metrics,many derived from accelerometers,can be examined in tagged wild animals to examine the change in behaviors over time with a view to having a better understanding of welfare issues,assuring the quality of recorded data and in-forming best practice.

关键词： behavior stress tags wild animals

Vegetable Production After Flooded Rice Improves Soil Properties in the Red River Delta, Vietnam

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Pedosphere 2015年第1期25卷 130-139页

作者： Arij P.EVERAARTS Jacques J.NEETESON Pham T.T.HUONG Paul C.STRUIK Applied Plant research Wageningen University and Research Centre Plant research International Wageningen University and Research Centre Field Crop research Institute Hai Duong and Hanoi University of Agriculture centre for Crop Systems Analysis Wageningen University

Vegetable production in South East Asia often is in rotation with flooded rice. The puddling of the soil with flooded rice production may result in unfavourable soil conditions for the subsequent production of dry land crops. To establish whether permanent vegetable production results in favourable soil conditions for vegetables, the effects of five different permanent vegetable production systems and a system of vegetable production in rotation with flooded rice on soil properties after flooded rice were studied in a 2-year field experiment. Bulk density at 0.05–0.10 m depth layer decreased with permanent vegetable production and vegetable production in rotation with flooded rice. The decrease in bulk density was influenced by the application of organic manure and rice husks, and especially by the number of crops cultivated, suggesting that frequency of soil tillage had a major effect on bulk density. Ploughing with buffalo traction after flooded rice, in combination with construction of raised beds, could reduce or totally eliminate negative effects of puddling on soil structure. Bulk density at 0.15–0.20 m soil depth was not influenced. Soil acidity decreased significantly in all systems. Soil organic carbon increased in all systems, but significant increase was only found in two permanent vegetable production systems. Available phosphorus(P) significantly increased in two permanent vegetable production systems, with a positively correlation to the amount of P applied. The significant decrease in bulk density and increase in p H(H2O), after only 2 years, showed that soil conditions after flooded rice could be improved in a short time under intensive vegetable production.

关键词： available phosphorus bulk density organic carbon puddling soil fertility soil improvement

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Hydropower reservoirs on the upper Mekong River modify nutrient bioavailability downstream

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National Science Review 2020年第9期7卷 1449-1457页

作者： Qiuwen Chen Wenqing Shi Jef Huisman Stephen C.Maberly Jianyun Zhang Juhua Yu Yuchen Chen Daniele Tonina Qitao Yi State Key Laboratory of Hydrology-Water Resources & Hydraulic Engineering Nanjing Hydraulic Research Institute Center for Eco-Environment research Nanjing Hydraulic Research Institute Department of Freshwater and Marine Ecology Institute for Biodiversity and Ecosystem DynamicsUniversity of Amsterdam Lake ecosystems Group UK Centre for Ecology & Hydrology 5. Department of Eco-Environment Conservation Yangtze Institute for Conservation and Development 6. Center for Ecohydraulics Research University of Idaho

Hydropower development is the key strategy in many developing countries for energy supply,climate-change mitigation and economic development. However, it is commonly assumed that river dams retain nutrients and therefore reduce downstream primary productivity and fishery catches, compromising food security and causing trans-boundary disputes. Contrary to expectation, here we found that a cascade of reservoirs along the upper Mekong River increased downstream bioavailability of nitrogen and *** dams caused phytoplankton density to increase with hydraulic residence time and stratification of the stagnant reservoirs caused hypoxia at depth. This allowed the release of bioavailable phosphorus from the sediment and an increase in dissolved inorganic nitrogen as well as a shift in nitrogen species from nitrate to ammonium, which were transported downstream by the discharge of water from the base of the dam. Our findings provide a new perspective on the environmental impacts of river dams on nutrient cycling and ecosystem functioning, with potential implications for sustainable development of hydropower worldwide.

关键词： Mekong River cascade reservoirs downstream nutrient bioavailability nitrogen phosphorus

IMPROVING FERTILIZATION METHODS AND CROPPING SYSTEMS FOR SUSTAINABLE PRODUCTION OF PEARL MILLET (PENNISETUM GLAUCUM) IN WEST AFRICA: A REVIEW

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Frontiers of Agricultural Science and Engineering 2022年第4期9卷 588-601页

作者： Philippe YAMEOGO Saturnin ZIGANI Xiaoqiang JIAO Hongyan ZHANG Junling ZHANG centre for Resources Environment and Food SecurityCollege of Resources and Environmental SciencesKey Laboratory of Plant-Soil InteractionsMinistry of EducationChina Agricultural UniversityBeijing 100193China

West African countries are among the larger global millet producers but have low yields mainly due to the low quality of their marginal *** objectives of this work were to analyze the benefits and constraints of pearl millet production,to summarize the impact of different cropping systems and fertilization modes while proposing a holistic approach for sustainable *** major constraints on millet yields are low rates or absence of fertilizers,unsuitable cropping systems,and the proliferation of pests and *** with cowpea is a widely used cropping system in addition to crop rotation,monocropping and agroforestry *** is the best fertilization mode for West African *** is concluded that integrated systems(breeding new cultivars,intercropping and microdosing)in tied ridges or infiltration pit practices,sustained by the implementation of innovative approaches such as the‘Science and Technology Backyards’from China are a promising approach for increasing pearl millet *** addition,policies such as land protection of the farmers and subsidies of inputs from the government and the effective involvement of farmers and extension officers are necessary in sustaining millet production in West Africa.

关键词： integrated management system pearl millet Science and Technology Backyard West Africa

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