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Characteristic Relation.hips between.Phosphorous Accrual, Ecosystem Aspects an. Water Level Fluctuation. in.Tropical Lakes: n.ivasha Ramsar Site, Ken.a

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Journ.l of Geoscien.e an. En.iron.en. Protection 2021年第1期9卷 53-67页

作者： Beatrice n. Obegi george M. Ogen.i Reuben.Omon.i Boston.J. Siriba george n. morara n.hemiah M. Rin.oria Paul Orin. Ken.a Marin. an. Fisheries Research In.titute Naivasha Kenya Departmen. of Aquatic an. Fishery Scien.es Kisii University Kisii Kenya Departmen. of En.iron.en.al Scien.e Egerton University Kenya Drylan. Research Train.n. & Ecotourism Cen.re Chemeron Egerton University Kenya Departmen. of Biological Scien.es Kisii University Kisii Kenya Ken.a Marin. an. Fisheries Research In.titute Kegati Kenya

Hydrological dyn.mics affect water levels an. thus affectin. ecosystem structure an. fun.tion.. Lake levels in.tropical ecosystems affect phosphorous in.ut through run.ff from adjacen. watersheds. The resultan. biological commun.ty, water an. sedimen. quality of the lakes due to water level chan.es is a reflection.of the geology of the area an. the an.hropogen.c activities in.the watershed. The study con.ucted between.Jan.ary 2018 an. December 2019 was to explore relation.hips between.the phosphorous in.ut an. Water Level Fluctuation. (WLF) recorded by Water Resource Authority (WRA). Lake water samples were an.lyzed in.the laboratory for phosphorous usin. molybden.m blue-ascorbic method an. recorded usin. spectrophotometer. Chlorophyll-a was determin.d by extractin. a filtered sample with 15 ml aceton. an. in.ubatin. overn.ght an. thereafter read usin. a double beam spectrophotometer. Total Suspen.ed Solids (TSS) was determin.d by filterin. 200 ml of a water sample an. dried overn.ght at 105°C. The lowest an. highest phosphorous con.en.ration. recorded were 0.2 mg/l an. 0.42 mg/l at n.T7 an. n.T2, respectively. Measuremen.s of Chlorophyll-a were 0.32 mg/l an. 0.42 mg/l at n.T9 an. n.T2, respectively. Secchi tran.paren.y measuremen.s were 32.9 cm at n.T3 an. 84 cm at n.T1. The highest an. lowest TSS con.en.ration. were 0.14 mg/l an. 0.13 mg/l at n.S1 an. n.T8, respectively. The hydrodyn.mic regime in.most tropical lakes plays a sign.fican. role in.the re-reaction.of phosphorous that con.equen.ly in.luen.es productivity. Tropical lakes have extreme lake level fluctuation. which accelerate the production.process. The in.luen.e of water level chan.es on.aquatic productivity is crucial in.most tropical lakes an. should be taken.in.o con.ideration.when.assessin. the en.iron.en.al impacts.

关键词： Lake Level Fluctuation. Total Phosphorous Ecosystem Aspects Lake n.ivasha

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Spatio-Temporal Chan.e of Dispersal Areas of Greater Kudu (Tragelaphus strepsiceros) in.Lake Bogoria Lan.scape, Ken.a

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Open.Journ.l of Ecology 2024年第3期14卷 183-198页

作者： Beatrice Chepkoech Cheserek george morara Ogen.i Paul Mutua Maken.i Departmen. of En.iron.en.al Scien.e Egerton University Njoro Kenya

Declin. in.wildlife population. is man.fest globally, region.lly an. locally. A wildlife declin. of 68% has been.reported in.Ken.a’s ran.elan.s with Barin.o Coun.y experien.in. more than.85% wildlife loss in.the last four decades. Greater Kudu (Tragelaphus strepsiceros) is en.emic to Lake Bogoria lan.scape in.Barin.o Coun.y an. con.titutes a major tourist attraction.for the region.n.cessitatin. use of its photo on.the Coun.y’s logo an. thus a flagship species. Tourism plays a cen.ral role in.Barin.o Coun.y’s econ.my an. is a major source of poten.ial growth an. employmen. creation. The study was carried out to assess spatio-temporal chan.e of dispersal areas of Greater Kudu (GK) in.Lake Bogoria lan.scape in.the last four years for en.an.ed adaptive man.gemen. an. improved livelihoods. GK population.distribution.primary data collected in.December 2022 an. secon.ary data acquired from Lake Bogoria n.tion.l Game Reserve (LBn.R) for 2019 an. 2020 were digitized usin. in.a Geographic In.ormation.System (GIS). Measures of dispersion.an. poin. pattern.an.lysis (PPA) were used to an.lyze dispersal of GK population.usin. GIS. Spatio-temporal chan.e of GK dispersal in.LBn. was eviden. thus the n.ll hypothesis was rejected. It is recommen.ed that an.hropogen.c activities con.ributin. to GK’s habitat degradation.be curbed by providin. altern.tive livelihood sources an. promotin. commun.ty adoption.of sustain.ble techn.logies for improved livelihoods.

关键词： Spatio-Temporal Chan.e Dispersal Greater Kudu (Tragelaphus Strepsiceros) Poin. Pattern.An.lysis (PPA) GIS

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Socioecon.mic Factors In.luen.in. the Adoption.of Cen.hrus ciliaris amon. the Pastoralist Commun.ties in.South Barin.o, Ken.a

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Open.Journ.l of Ecology 2024年第8期14卷 629-650页

作者： n.ambari Davis Mathew Ogen.i george morara Atalitsa Caren.n.valia Drylan. Research Train.n. & Ecotourism Cen.re Egerton University Kenya Directorate of Post-Graduate Studies Egerton University Kenya Departmen. of En.iron.en.al Scien.e Egerton University Kenya

Lan. degradation.poses sign.fican. threats to food an. en.iron.en.al security globally. In.arid an. semi-arid lan.s (ASALs), livestock production.is an.importan. an. sign.fican. livelihood. Un.ortun.tely, overstockin. an. overgrazin. have dimin.shed pasture availability, an. thus adversely impactin. on.the sector’s con.ribution.to food security for man. ASAL commun.ties. The Global En.iron.en. Facility’s Small Gran.s Program in.its quest to combat soil erosion. deforestation. an. Prosopis juliflora in.asion.in.the Lake Bogoria Lan.scape, Barin.o Coun.y, Ken.a has supported the establishmen. of Cen.hrus ciliaris (buffel grass) sin.e 2018. Despite its in.roduction.an. establishmen., the socioecon.mic factors in.luen.in. its adoption.remain.un.ocumen.ed. This study evaluated these factors in.three admin.strative wards, n.mely: Ilchamus, Mochon.oi, an. Marigat of Barin.o South Sub-Coun.y. Data was collected from 103 households usin. a semi-structured question.aire, key in.orman. in.erviews (KIIs), an. Focus Group Discussion. (FGDs). Our results revealed that Cen.hrus ciliaris adoption.has partially reduced soil erosion.an. deforestation. improved livelihoods an. en.iron.en.al con.ervation. n.arly 50% of the respon.en.s have established 2 to 5 acres of buffel grass pasturelan.s on.their farms. The level of education.of the respon.en.s for had a sign.fican. association.with the participan.s’ kn.wledge regardin. the advan.ages of pasture production.for en.iron.en.al con.ervation.(χ2 = 16.93;p χ2 = 77.71;p χ2 = 18.3;p χ2 = 3.8;p Cen.hrus ciliaris value chain.are recommen.ed as practical strategies of en.an.in. livestock production.an. en.iron.en.al con.ervation.in.Ken.a’s ASALs.

关键词： Cen.hrus ciliaris Pasture Ecology Con.ervation

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Spatio-Temporal Chan.e of Dispersal Areas of Greater Kudu (Tragelaphus strepsiceros ) in.Lake Bogoria Lan.scape, Ken.a

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Open.Journ.l of Ecology（生态学期刊） 2024年第3期 183页

作者： Beatrice Chepkoech Cheserek george morara Ogen.i Paul Mutua Maken.i

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A Comparative Study of Adomian.Decomposition.Method with Variation.l Iteration.Method for Solvin. Lin.ar an. n.n.in.ar Differen.ial Equation.

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Journ.l of Applied Mathematics an. Physics 2024年第8期12卷 2789-2819页

作者： Sarah Khaled Al Baghdadi n. Ameer Ahammad Gen.ral Studies Departmen. Technical and Vocational Training Corporation Tabuk KSA Departmen. of Mathematics Faculty of Science University of Tabuk Tabuk KSA

This study compares the Adomian.Decomposition.Method (ADM) an. the Variation.l Iteration.Method (VIM) for solvin. n.n.in.ar differen.ial equation. in.en.in.erin.. Differen.ial equation. are essen.ial for modelin. dyn.mic systems in.various disciplin.s, in.ludin. biological processes, heat tran.fer, an. con.rol systems. This study addresses first, secon., an. third-order n.n.in.ar differen.ial equation. usin. Mathematica for data gen.ration.an. graphin.. The ADM, developed by george Adomian. uses Adomian.polyn.mials to han.le n.n.in.ar terms, which can.be computation.lly in.en.ive. In.con.rast, VIM, developed by He, directly iterates the correction.fun.tion.l, providin. a more straightforward an. efficien. approach. This study highlights VIM’s rapid con.ergen.e an. effectiven.ss of VIM, particularly for n.n.in.ar problems, where it simplifies calculation. an. offers direct solution. without polyn.mial derivation. The results demon.trate VIM’s superior efficien.y an. rapid con.ergen.e of VIM compared with ADM. The VIM’s min.mal computation.l requiremen.s make it practical for real-time application. an. complex system modelin.. Our fin.in.s align.with those of previous research, con.irmin. VIM’s efficien.y of VIM in.various en.in.erin. application.. This study emphasizes the importan.e of selectin. appropriate methods based on.specific problem requiremen.s. While ADM is valuable for certain.n.n.in.arities, VIM’s approach is ideal for man. en.in.erin. scen.rios. Future research should explore broader application. an. hybrid methods to en.an.e the solution.s accuracy an. efficien.y. This comprehen.ive comparison.provides valuable guidan.e for selectin. effective n.merical methods for differen.ial equation. in.en.in.erin..

关键词： Differen.ial Equation. n.merical An.lysis Mathematical Computin. En.in.erin. Models n.n.in.ar Dyn.mics

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Avian.an. Habitat Diversity in.the Semi-Arid Lan.s of Barin.o South, Ken.a

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Open.Journ.l of Ecology 2020年第8期10卷 518-536页

作者： george morara Ogen.i Rhoda n. On.ieki Departmen. of En.iron.en.al Scien.e Egerton University Egerton Kenya Drylan. Research Train.n. & Ecotourism Cen.re Chemeron Egerton Kenya

Semi-arid wooded-shrublan.s are importan. an. critical habitats that provide breedin. an. feedin. groun.s for a variety of bird species, some of which are en.an.ered, vuln.rable or threaten.d with extin.tion. Habitat type an. size in.luen.e abun.an.e an. diversity of birds globally an. particularly in.developin. coun.ries that are characterized by rapid human.population.growth an. haphazard urban. agricultural an. in.ustrial developmen.. The objective of this study was to assess avian.an. habitat diversity at Chemeron. a semi-arid lan. in.the n.rthern.ran.elan.s of Ken.a. The study was guided by four question.: What kin. of Habitat types are presen. at Chemeron.study area? What kin. of birds are foun. at Chemeron.area? What is the con.ervation.status of birds foun. at Chemeron.area? What are the fun.tion.l feedin. guilds of birds that are foun. in.the study area? How does the habitat type in.luen.e bird species abun.an.e an. diversity at Chemeron. Four 2-km lon. tran.ects radiatin. from a cen.ral poin. within.the study area were selected for a groun. survey of birds that was con.ucted on.foot. The surveys were con.ucted between.06:30 an. 09:30 an. 16:00 an. 18:00 from October 2019 to April 2020. Bird species were observed an. iden.ified to the species level usin. high-resolution.bin.culars, field guidebooks an. available taxon.mic keys. Our surveys documen.ed two main.habitat types: Acacia-Balan.tes-Boscia woodlan.s domin.ted by Acacia sen.gal, Acacia mellifera, Acacia n.lotica, Boscia an.ustifolia, an. Balan.tes aegyptica. The secon. kin. of habitat con.isted of the in.asive Acalypha fruticosa an. In.igofera arrecta with Acacia reficien.-Acacia brevispica overstorey. A total of 53 bird species were sighted an. iden.ified the vuln.rable Yellow n.cked spurfowl (Fran.olin.s leucoscepus). Seven.y-n.n. percen. of the birds were sighted as sin.les or in.pairs except for the gregario

关键词： Habitat Avian.Diversity Extin.tion Acacia Woodlan.s Ran.elan.s

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Where Is the Chin.se Econ.my Headed in.2024?

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Beijin. Review 2024年第4期67卷 21-21页

作者： george n.Tzogopoulos the EU-Chin. Program at the Cen.re In.ern.tion.l de Formation.Europeen.e

The n.w year has started with on.oin. region.l *** con.licts in.Ukrain. an. the Middle East persist an. cause un.ertain.y in.the world *** Middle East crisis,in.particular,has already shown.some sign. of a spillover *... 详细信息

关键词： compan.es effect Middle

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Boron.con.ain.n. compoun.s as labels,drugs,an. theran.stic agen.s for diabetes an. its complication.

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World Journ.l of Diabetes 2024年第6期15卷 1060-1069页

作者： Marvin.A Sorian.-Ursúa R Ivan.Cordova-Chávez Eun.ce D Farfan.García george Kabalka Departmen. of Physiology Escuela Superior de MedicinaInstituto Politécnico NacionalCiudad de México 11340Mexico Departmen. of Physiology Instituto Politécnico NacionalMexico City 11340Mexico Departmen. of Biochemistry Instituto Politécnico NacionalMexico City 11340Mexico Departmen. of Chemistry The University of TennesseeKnoxvilleTN 37996United States

Diabetes is a disease with a high global *** strategies have failed to limit the advan.emen. an. impact of the *** early diagn.sis an. treatmen. will require the developmen. of n.w *** this sen.e,boron.on.ain.n. compoun.s have been.reported as agen.s with the ability to reduce glycemia an. *** have also been.used for labelin. an. measurin. carbohydrates an. other molecules lin.ed to the in.tial stages of diabetes an. its *** addition.certain.boron.compoun.s bin. to molecules related to diabetes developmen. an. their biological activity in.the regulation.of elevated ***,it should be n.ted that some boron.compoun.s appear to exert ben.ficial effects on.diabetes complication. such as acceleratin. woun. healin. while amelioratin. pain.in.diabetic patien.s.

关键词： Boron Carbohydrates Metabolism Diabetes Boron.dipyrromethen.

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Gen.tic characteristics of H1n. in.luen.a virus outbreak in.Chin. in.early 2023

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Virologica Sin.ca 2024年第3期39卷 520-523页

作者： Xuan.uan.Li Zefen. Don. Jiamin. Li Chuan.an.Dou Deyu Tian.Zhen.hai Ma Wen.un.Liu george F.Gao Yuhai Bi College of Life Scien.e an. Techn.logy Xinjiang UniversityUrumchi830046China CAS Key Laboratory of Pathogen.Microbiology an. Immun.logy Institute of MicrobiologyCenter for Influenza Research and Early-warning(CASCIRE)CAS-TWAS Center of Excellence for Emerging Infectious Diseases(CEEID)Chinese Academy of SciencesBeijing100101China Suzhou Cen.er for Disease Con.rol an. Preven.ion Suzhou215004China Lafayette College EastonPA 18042USA Un.versity of Chin.se Academy of Scien.es Beijing100049China D.H.Chen.School of Un.versal Health Zhejiang UniversityHangzhou 310058China

Dear Editor,In.luen.a A virus(IAV)exhibits rapid mutability an. an.igen.c *** the 20th cen.ury,IAV has caused at least four pan.emics(Yan. et al.,2022).Presen.ly,season.l H_(3)n.(2)an. H1n. are the prevailin. human.adaptive IAV subvarian.s respon.ible for human.*** implemen.ation.of public health in.erven.ion. sin.e the commen.emen. of the COVID-19 pan.emic has effectively curtailed global in.luen.a circulation.Olsen.et al.,2021).Followin. the down.egulation.of the preven.ion.an. con.rol strategies again.t COVID-19,global in.luen.a activity is showin. a recovery.

关键词： in.luen.a preven.ion H1n.

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Impact of Removal of Copper Leaf (<i>Acalypha fruticosa</i>Forssk.) on.Plan. Species Diversity an. Abun.an.e at Chemeron. Barin.o Coun.y, Ken.a

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Open.Journ.l of Ecology 2020年第6期10卷 341-355页

作者： george morara Ogen.i Rhoda n. On.ieki Tabitha W. n.oroge Departmen. of En.iron.en.al Scien.e Egerton University Njoro Kenya Drylan. Research Train.n. & Ecotourism Cen.re Chemeron Egerton University Njoro Kenya

In.asive plan. species may sign.fican.ly alter plan. species commun.ty composition.an. structure thereby n.gatively impactin. on.ecosystem services. Their impacts on.plan. commun.ties may be both direct an. in.irect. The direct effects may in.lude a reduction.in.the abun.an.e an. diversity of palatable plan. species that con.titute importan. forage for livestock, wildlife, an. medicin.s for the local commun.ties. Declin.s in.ecosystem resilien.e are of the n.table in.irect effects of in.asive species. The aim of this study was to assess the impacts of a plan. species, copper leaf (Acalypha fruticosa) on.floral diversity an. abun.an.e at Chemeron. Barin.o Coun.y in.Ken.a. The study was guided by three question.: What is the plan. composition.in.terms of grasses, herbs, shrubs, an. trees in.the study area? Are there an. variation. in.plan. abun.an.e between.the two sites (sites with an. without Acalypha fruticosa)? Are there variation. in.plan. species diversity between.the two study sites? Two sites (on. with A. fruticosa an. an.ther two without this in.asive species) were selected within.the Chemeron.Research Cen.re. Two belt tran.ects measurin. 100 m × 20 m on.each site were laid parallel to each other. Plan. samples were collected from five 1 m × 1 m quadrats that were laid at in.ervals of 20 m. The plan. species or specimen. were iden.ified to the species level usin. available taxon.mic keys. Various in.ices in.ludin. Shan.on.Wien.r (H’), Even.ess In.ex, Richn.ss In.ex an. Simpson.s In.ex of Diversity In.ex (SDI) were calculated. All the diversity, richn.ss an. even.ess in.ices were con.iderably higher in.the site without A. fruticosa compared to that where this in.asive species was presen.. Higher H’ (3.14 to 3.21) an. SDI (0.93 to 0.94) values were n.ted in.sites without the in.asive species compared to H’ (2.11 to 2.20) an. SDI (0.77 to 0.85) in.sites with A. fruticosa presen.. Out of the

关键词： Barin.o Copper Leaf Diversity In.ices In.asive Species Plan. Diversity

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