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Impact of invasive Ageratina adenophora on relative performance of woody vegetation in different forest ecosystems of Kumaun Himalaya,India

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Journal of Mountain science 2023年第9期20卷 2557-2579页

作者： Bhawna NEGI Kavita KHATRI surendra s.bargali Kiran bargali Archana FARTYAL R.K.CHATURVEDI Department of Botany D.S.B CampusKumaun UniversityNainital-263002UttarakhandIndia Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglun 666303China

Invasive plant Ageratina adenophora(sprengel)***&*** has invaded majority of the temperate forests in Kumaun,Central *** on *** invaded forest types,their structural attributes,population demography and regeneration status are still at rudimentary *** this,the present study was conducted to assess the impacts of *** on vegetational attributes and regeneration status of three forest types,viz.,Oak(Quercus oblongata ***),Pine(Pinus roxburghii sarg.)and Cypress(Cupressus torulosa ***).We selected three sites for each forest type and each site was further purposively stratified into paired sampling plots of 1 ha each i.e.,*** invaded and uninvaded *** results showed large densities of cut stumps or felled trees throughout invaded sites,but with fewer fire signs in comparison to uninvaded *** uninvaded sites,total density and basal area calculated for woody species were relatively higher than those in invaded sites,although results were insignificant(p>0.05).With the exception for Cypress forests,vegetation indices showed low woody species richness and diversity in invaded Oak and Pine ***,regeneration of ***,*** and *** tree species did not differ significantly(p>0.05)between invaded and uninvaded *** insignificant differences clearly imply that ***'s presence has not entirely changed the perennial plant communities in terms of composition,structure and natural ***,tree species with poor or no regeneration status requires special attention and needs management strategies involving control of invasive species in forest ecosystems.

关键词： Ageratina adenophora seedling density Forests Population structure Regeneration

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Impacts of Coriaria nepalensis colonization on vegetation structure and regeneration dynamics in a mixed conifer forest of Indian Central Himalaya

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Journal of Forestry Research 2019年第1期30卷 305-317页

作者： Nidhi Rani Mourya Kiran bargali surendra singh bargali Department of Botany DSB Campus Kumaun University

This study evaluated impacts of Coriaria nepalensis *** on soil characteristics,vegetation structure and composition,regeneration status and expected future compositional changes,biomass and carbon stock in tree species of a mixed conifer forest of Central *** sites(1 ha each in an old landslide area)differing in Coriaria density(low:20 individuals ha^(-1);medium:120 ***^(-1);high:190 ***^(-1))were used to enumerate the tree species.A total of 9 tree species and 2830 individuals were recorded from the three study sites that represented a gradient of Coriaria *** of species varied from 3 to 7 and the individuals from 690 to 1270 per site with lowest numbers at low Coriaria density and highest at medium Coriaria *** number of seedlings increased with increasing Coriaria density,and the sites were unique in their seedling composition,indicating marked temporal *** wise regeneration analysis showed that regeneration was poor at the site with low Coriaria density and good at the high-density site where many species emerged as *** results indicate that the ameliorative effects of Coriaria in terms of soil buildup,and accumulation of nutrients and organic matter helped more species to colonize the *** facilitative ability of Coriaria can be used to restore degraded forest ecosystems of Indian Central Himalaya.

关键词： Basal area Conifer Coriaria Density Facilitation species richness

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Changes in soil biochemical properties following replacement of Banj oak forest with Chir pine in Central Himalaya,India

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Ecological Processes 2020年第1期9卷 346-354页

作者： Vijyeta Manral Kiran bargali s.s.bargali Charu shahi Department of Botany D.S.B.CampusKumaun UniversityNainitalUttarakhand 263001India

Introduction:In Central Himalaya,anthropogenic activities have led to the widespread replacement of Banj oak(Quercus leucotrichophora)forest by Chir pine(Pinus roxburghii)for *** study was conducted to determine how natural Banj oak,Chir pine,and mixed oak-pine forest would differ in soil microbial biomass and soil *** microbial biomass nitrogen(sMBN)and phosphorus(sMBP),soil organic carbon(sOC)total nitrogen(TN),and total phosphorus(TP)in the 0 to 15 cm soil layer were investigated in the Central Himalayan region in the stands of Banj oak,mixed oak-pine,and Chir pine ***:The sMBN and sMBP were significantly higher in Banj oak and mixed oak-pine forest as compared to Chir pine *** ratios of sMBN to TN(sMBN/TN)and sMBP to TP(sMBP/TP)were significantly higher in the Chir pine forest,indicating that in this forest,the proportion of microbial biomass N and P to total soil N and P was higher as compared to Banj oak forest.A similar pattern of variation was found in relation to season across the forests,all with an apparent peak in the rainy ***:These results indicate that low microbial biomass N and P may be one of the reasons to create a nutrient poor site in Chir pine *** collection of pine litter by local people also impairs the return of nutrients to the soil and makes it difficult for Banj oak to re-invade areas occupied by Chir *** calls for cautions in large-scale conversions of the Banj oak forests to coniferous plantations as a forest management practice on concerns of sustaining soil productivity.

关键词： soil microbial biomass nitrogen(sMBN) soil microbial biomass phosphorus(sMBP) Forest types Chloroform fumigation and extraction method(CFE) Altitude

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Wildland fires and moist deciduous forests of Chhattisgarh, India: divergent component assessment

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Journal of Forestry Research 2014年第4期25卷 857-866页

作者： B.H.Kittur s.L.swamy s.s.bargali Manoj Kumar Jhariya Department of silviculture & Agroforestry College of Forestry Kerala Agriculture University Vellanikara Thrissure Kerala India Department of Forestry College of Agriculture Indira Gandhi Krishi Vishwavidyalaya Raipur (C.G.) 492006 India Department of Botany DSB Campus Kumaun University Nainital–263001 (Uttarakhand) India

We studied moist deciduous forests of Chhattisgarh, India （1） to assess the effect of four levels of historic wildland fire frequency （high, medium, low, and no-fire） on regeneration of seedlings in fire affected areas during pre and post-fire seasons, （2） to evaluate vegetation struc- ture and diversity by layer in the four fire frequency zones, （3） to evalu- ate the impact of fire frequency on the structure of economically impor- tant tree species of the region, and （4） to quantify fuel loads by fire fre- quency level. We classified fire-affected areas into high, medium, low, and no-fire frequency classes based on government records. Tree species were unevenly distributed across fire frequency categories. shrub density was maximum in zones of high fire frequency and minimum in low- frequency and no-fire zones. Lower tree density after fires indicated that regeneration of seedlings was reduced by fire. The population structure in the high-frequency zone was comprised of seedlings of size class （A） and saplings of size class （B）, represented by Diospyros melanoxylon, Dalbergia sissoo, shorea robusta and Tectona grandis. Younger and older trees were more abundant for Tectona grandis and Dalbargia sis- soo after fire, whereas intermediate-aged trees were more abundant pre- fire, indicating that the latter age-class was thinned by the catastrophic effect of fire. The major contributing components of fuel load included duff litter and small woody branches and twigs on the forest floor. Total fuel load on the forest floor ranged from 2.2 to 3.38 Mg/ha. The netchange in fuel load was positive in high- and medium-frequency fire zones and negative under low- and no-fire zones. Repeated fires, how- ever, slowly reduced stand stability. An ecological approach is needed for fire management to restore the no-fire spatial and temporal structure of moist deciduous forests, their species composition and fuel loads. The management approach should incorporate participatory forest ma

关键词： forest fire diversity fuel load vegetation structure

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Plant studies in Himachal Pradesh,Western Himalaya: a systematic review

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Journal of Mountain science 2021年第7期18卷 1856-1873页

作者： Himanshu bargali Manisha MATHELA Rupali sHARMA Monika sHARMA Dani YAMING Amit KUMAR Contributed equally to this work Wildlife Institute of India Post box#18Dehradun 248002UttarakhandIndia

Owing to a predicted rise in temperature,increase in precipitation and the escalating anthropogenic stresses,the Himalayan ecosystems are the most threatened non-polar regions of the *** the past,there have been racing extinctions and range shifts of several life forms in this region,particularly of the plant ***,consistent qualitative and quantitative records on botanical baseline data on a regular basis are *** current communication attempts to provide a detailed account on the current state of knowledge and research gaps in floristic studies of Himachal Pradesh,Western *** on an extensive review of more than 140 studies in the form of scientific peer reviewed literature on floristics,medicinal and aromatic plants(MAPs),rare,endangered,threatened and endemic species and ethno-botany,it is revealed that the number of floristic studies in Himachal Pradesh have surged in the past years but studies pertaining to the lower plants remain ***,the remote valleys including micro-watersheds lying in the coldarid regions are relatively less studied in terms of available growing stock and population status of *** traditional ethno-botanical knowledge has been the major concern and,many threatened MAPs need to be accessed globally following IUCN ***,documentation of the conservation status of key MAPs,setting aside conservation areas around viable populations of threatened species,developing germplasm banks of the priority MAPs and monitoring the impacts of climate change has been suggested.

关键词： Biodiversity Ethno-botany Flora Medicinal plants Threatened plants Western Himalaya

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Taxonomy of Data Prefetching for Multicore Processors

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Journal of Computer science & Technology 2009年第3期24卷 405-417页

作者： surendra Byna 陈勇孙贤和 Department of Computer science Illinois Institute of TechnologyChicagoIllinois 60616U.S.A.

Data prefetching is an effective data access latency hiding technique to mask the CPU stall caused by cache misses and to bridge the performance gap between processor and memory. With hardware and/or software support, data prefetching brings data closer to a processor before it is actually needed. Many prefetching techniques have been developed for single-core processors. Recent developments in processor technology have brought multicore processors into mainstream. While some of the single-core prefetching techniques are directly applicable to multicore processors, numerous novel strategies have been proposed in the past few years to take advantage of multiple cores. This paper aims to provide a comprehensive review of the state-of-the-art prefetching techniques, and proposes a taxonomy that classifies various design concerns in developing a prefetching strategy, especially for multicore processors. We compare various existing methods through analysis as well.

关键词： taxonomy of prefetching strategies multicore processors data prefetching memory hierarchy

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server-Based Data Push Architecture for Multi-Processor Environments

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Journal of Computer science & Technology 2007年第5期22卷 641-652页

作者：孙贤和 surendra Byna 陈勇 Department of Computer science Illinois Institute of Technology ChicagoIllinois 60616U.S.A.Computing DivisionFermi National Accelerator Laboratory.BataviaIL 60510-0500U.S.A. Department of Computer science Illinois Institute of Technology ChicagoIllinois 60616U.S.A.

Data access delay is a major bottleneck in utilizing current high-end computing （HEC） machines. Prefetching, where data is fetched before CPU demands for it, has been considered as an effective solution to masking data access delay. However, current client-initiated prefetching strategies, where a computing processor initiates prefetching instructions, have many limitations. They do not work well for applications with complex, non-contiguous data access patterns. While technology advances continue to increase the gap between computing and data access performance, trading computing power for reducing data access delay has become a natural choice. In this paper, we present a serverbased data-push approach and discuss its associated implementation mechanisms. In the server-push architecture, a dedicated server called Data Push server （DPs） initiates and proactively pushes data closer to the client in time. Issues, such as what data to fetch, when to fetch, and how to push are studied. The simplescalar simulator is modified with a dedicated prefetching engine that pushes data for another processor to test DPs based prefetching. simulation results show that L1 Cache miss rate can be reduced by up to 97% （71% on average） over a superscalar processor for sPEC CPU2000 benchmarks that have high cache miss rates.

关键词： performance measurement evaluation modeling simulation of multiple-processor system cache memory

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Automated recognition and classification of adulteration levels from bulk paddy grain samples

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Information Processing in Agriculture 2019年第1期6卷 47-60页

作者： Basavaraj s.Anami Naveen N.Malvade surendra Palaiah Department of Computer science and Engineering K L E Institute of TechnologyHubballi 580030India Department of Information science and Engineering K L E Institute of TechnologyHubballi 580030India Department of Genetics and Plant Breeding University of Agricultural SciencesDharwar580002India

Fraudulent labeling and adulteration are the major concerns in the global rice *** all the paddy varieties being sold in the market are prone to *** is very difficult to differentiate paddy grains of various varieties in the mixed bulk sample based on visual ***,there is no sophisticated appearance-based commercial scale technology to reliably detect and quantify adulteration in bulk paddy grain *** paper presents a cost-effective image processing technique for the recognition of adulteration and classification of adulteration levels(%)from the images of adulterated bulk paddy samples using state-of-the-art color and texture *** this work,seven adulterated bulk paddy samples are considered and each of the samples is prepared by mixing a premium paddy variety with the identical looking and commercially inferior paddy variety at five different adulteration levels(weight ratios)of 10%,15%,20%,25%and 30%.The study compares the performances of three different classification models,namely,Multilayer Back Propagation Neural Network(BPNN),support Vector Machine(sVM)and k-Nearest Neighbor(k-NN).The Principal Component Analysis(PCA)and sequential Forward Floating selection(sFFs)methods have been employed separately for the automatic selection of optimal feature subsets from the combined color and texture *** maximum average adulteration level classification accuracy of 93.31%is obtained using the BPNN classification model trained with PCA-based reduced *** proposed technique can be used as an economic,rapid,non-destructive and quantitative technique for testing adulteration,authenticity,and quality of bulk paddy grain samples.

关键词： Bulk paddy grains Adulteration quantification Feature selection GLCM LBP BPNN PCA sVM k-NN

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Deep learning approach for recognition and classification of yield affecting paddy crop stresses using field images

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Artificial Intelligence in Agriculture 2020年第1期4卷 12-20页

作者： Basavaraj s.Anami Naveen N.Malvade surendra Palaiah Department of Computer science and Engineering K.L.E.Institute of TechnologyHubballi 580030KarnatakaIndia Department of Information science and Engineering K.L.E.Institute of TechnologyHubballi 580030KarnatakaIndia Department of Genetics and Plant Breeding University of Agricultural SciencesDharwar 580002KarnatakaIndia Visvesvaraya Technological University Belagavi 590018KarnatakaIndia

On-time recognition and early control of the stresses in the paddy crops at the booting growth stage is the key to prevent qualitative and quantitative loss of agricultural *** conventional paddy crop stress recognition and classification activities invariably rely on human experts identifying visual symptoms as a means of *** process is admittedly subjective and error-prone,which in turn can lead to incorrect actions being taken in stress management *** work presented in this paper aims to design a deep convolutional neural network(DCNN)framework for automatic recognition and classification of various biotic and abiotic paddy crop stresses using the field *** has adopted the pre-trained VGG-16 CNN model for the automatic classification of stressed paddy crop images captured during the booting growth *** trained models achieve an average accuracy of 92.89%on the held-out dataset,demonstrating the technical feasibility of using the deep learning approach utilizing 30,000 field images of 5 different paddy crop varieties with 12 different stress categories(including healthy/normal).The proposed work finds applications in developing the decision support systems and mobile applications for automating the field crop and resource management practices.

关键词： Paddy crop Biotic and abiotic stress CNN VGG-16

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Partial genomic organization of ribosomal protein s7 gene from malaria vector Anopheles stephensi

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Insect science 2007年第2期14卷 101-106页

作者： RAJNIKANT DIXIT sARITA DIXIT UPAL ROY YOGEsH s.sHOUCHE surendra GAKHAR Department of Biosciences Maharshi Dayanand University RohtakPune University Campus Pune India National Centre for Cell science Pune University Campus Pune India

In this study, we describe the partial genomic organization of ribosomal protein s7 gene isolated from the mosquito Anopheles stephensi. Initially a 558 bp partial cDNA sequence was amplified as precursor mRNA sequence containing 223 bp long intron. 5＇ and 3＇ end sequences were recovered using end specific rapid amplification of cDNA ends （RACE） polymerase chain reaction. The full-length cDNA sequence was 914 nucleotide long with an open reading frame capable of encoding 192 amino acid long protein with calculated molecular mass of 22174 Da and a pI point of 9.94. Protein homology search revealed 〉75% identity to other insect＇s s7 ribosomal proteins. Analysis of sequence alignment revealed several highly conserved domains, one of which is related to nuclear localization signal （NLs） region of human rps7. Interestingly, intron nucleotide sequence comparison with A. gambiae showed a lesser degree of conservation as compared to coding and untranslated regions. Like this, early studies on the genomic organization and cDNA/ Expressed sequence tag analysis （EsT） could help in genome annotation ofA. stephensi, and would be likely to be sequenced in the future.

关键词： Anopheles malaria mosquito ribosomal protein vector

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