Dissertations / Theses on the topic 'Earthworms'
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Butt, Kevin Richard. "An investigation into the growth and reproduction of the earthworm Lumbricus terrestris L. under controlled environmental conditions." Thesis, n.p, 1990. http://ethos.bl.uk/.
Full textChen, Shing-Chong. "Enzyme Assays Using Earthworms for Assessing Innate and Nonspecific Immunotoxicity of Xenobiotics." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc277598/.
Full textYu, Shuo. "Bioaccumulation of Metals in Earthworms." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259697144.
Full textGift, Danielle Marie. "Earthworms in the Urban Environment: Can Population Augmentation Improve Urban Soil Properties?" Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/34408.
Full text- We conducted an observational study across three landuse types to assess earthworm abundance and diversity as well as associated soil properties. Earthworm abundance and biomass in were affected by land use type, disturbance time frame, and seasonality. Earthworm abundance and biomass were affected by a suite of complex soil and temporal variables, and soil temperature and moisture seemed to be the most influential properties.
- We conducted an earthworm inoculation experiment on a compacted cut-fill field soil with a very low existing earthworm population. In 2008, three soil treatments (control, compost, and compost + earthworm) were applied to 2 m2 plots into which two common urban tree species with contrasting soil tolerances were planted (Acer rubrum and Cornus florida). We measured soil physical and chemical properties along with earthworm survival and soil respiration. Earthworm inoculation did not succeed in improving bulk density or increasing soil organic matter, yet it was successful in increasing soil CEC, Fe, and Mn relative to compost only effects.
Master of Science
Hariri, Maryam Feili. "Morphological and Immunological Characterization of Earthworm Lumbricus terrestris Coelomocytes." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc798176/.
Full textBuchheim, Caitlin M. "DIGESTION PROCESS IN LUBMRICUS TERRESTRIS ALTERS MICROBIAL ENZYME PRODUCTION AND SOIL NUTRIENTS." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1578657686503075.
Full textSimmons, Carla Stull. "Influence of copper on resistance of Lumbricus terrestris to bacterial challenge." Thesis, University of North Texas, 2000. https://digital.library.unt.edu/ark:/67531/metadc2602/.
Full textPerreault, Jonathan M. "Casting activity of Lumbricid earthworms from temperate agroecosystems." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82405.
Full textRicketts, Huw John. "Molecular genetic biomarkers of reproductive fitness in earthworms." Thesis, Cardiff University, 2004. http://orca.cf.ac.uk/55966/.
Full textSizmur, Tom. "Impact of earthworms on metal mobility and availability." Thesis, University of Reading, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553168.
Full textKadir, Nawzad. "Plant mediated effects of earthworms on aphid dynamics." Thesis, University of Plymouth, 2014. http://hdl.handle.net/10026.1/3037.
Full textCikutovic, Salas Marcos A. "Pathologies in earthworms: sublethal biomarkers of xenobiotic toxicity." Thesis, University of North Texas, 1991. https://digital.library.unt.edu/ark:/67531/metadc798085/.
Full textMohammadian, Gholamreza. "Immunotoxicity of Chromium Contaminated Soil in the Earthworm, Lumbricus Terrestris." Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc501250/.
Full textChaoui, Hala I. "Separating earthworms from organic media using an electric field." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1133296897.
Full textSuzuki, Yoshiaki, Teruo Matsubara, Mitsuo Hoshino, and 輝男 松原. "Breakdown of mineral grains by earthworms and beetle larvae." Elsevier, 2003. http://hdl.handle.net/2237/5300.
Full textGoats, Geoffrey Charles. "Assessment of the effects of toxic chemicals upon earthworms." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37706.
Full textBartlett, Mark D. "The ecology and control of earthworms on golf courses." Thesis, Cranfield University, 2006. http://dspace.lib.cranfield.ac.uk/handle/1826/7585.
Full textBrooks, Geoffrey Lance. "Coelomic Fluid Protein Profile in Earthworms Following Bacterial Challenge." Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5476/.
Full textVoua, otomo Patricks. "The effects of long-term exposure to cadmium on the earthworm Eisenia Fetida (Oligochaeta) : an investigation of the development of genetic metal resistance." Thesis, Stellenbosch : Stellenbosch University, 2006. http://hdl.handle.net/10019.1/22010.
Full textENGLISH ABSTRACT: The development of potential genetically based resistance to cadmium (Cd) after long-term exposure to this metal at a sublethal concentration, was investigated in earthworm specimens belonging to the genus Eisenia. Adult (clitellate) earthworms from a long-term laboratory Cdexposed population (> 78 generations) and from other populations having no previous history of metal exposure were exposed to increasing concentrations (0; 2.5; 5; 10 and 20 mg/l) of Cd in the form of CdSO4. Different biomarkers and molecular markers were used to determine whether the specimens from the long-term Cd-exposed population had acclimatized or adapted to the metal contaminated environment. Acclimation was investigated at different physiological and biochemical levels using the following three biomarkers: the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay (MTT assay) measuring mitochondrial activity and cell viability; the single cell gel electrophoresis assay (comet assay) measuring DNA strand breaks and the biosynthesis of metallothioneins (MTs) that have the function of lowering metal toxicity. Earthworms from the long-term exposed substrate as well as specimens from populations not exposed to Cd were used. Adaptation was investigated by looking at both allozyme polymorphism at seven enzyme encoding loci and DNA polymorphism using chosen neutral and selectable genetic markers. The markers used were cytochrome c oxydase subunit I (COI) and metallothionein-2 (mt-2) respectively. This was done amongst the same pool of populations. Additionally, the DNA polymorphism study also aimed at genetically identifying the species utilized in this study thereby determining whether these earthworms belong to the species Eisenia fetida or Eisenia andrei. MTs biosynthesis did not generate the expected data mainly due to the fact that a suitable antibody could not be obtained (discussed in Chapter 5 section 5.3.3.). Similarly, the assessment of DNA polymorphism at the chosen selectable genetic marker mt-2 did provide information relevant to understanding the potential development of resistance to Cd in the long-term metal contaminated group. COI sequences generated in this study were compared to E. fetida and E. andrei COI sequences available on Genbank. Consequently, specimens used in this study were identified as possibly belonging to the species E. andrei. Allozyme polymorphism revealed no fixed genetic differences between the long-term Cd exposed laboratory culture and the rest of the populations. All the populations departed from Hardy-Weinberg equilibrium (χ2 > 5.9; p < 0.05), and showed a low mean heterozygosity per locus (Ho ≤ 0.21), probably due to inbreeding. Cell viability and proliferation as tested by the MTT assay revealed that coelomocytes, isolated from the long-term Cd-exposed group showed the highest viability (98.42%) compared to those from other groups (+/- 80%). Kruskal-Wallis ANOVA (H2, 225=109.7165 p < 0.001) revealed that the long-term Cd-exposed laboratory culture showed a better response to acute exposure to Cd, thus demonstrating that these worms have developed some kind of tolerance to Cd. Similarly, the comet assay showed that in the long-term Cd-exposed specimens, less DNA breaks occurred after Cd exposure than in the unexposed groups. Of all the comet parameters assessed in this study (comet tail length, tail moment and tail DNA percentage), tail DNA percentage seemed to be more sensitive although all three parameters indicated that long-term Cd-exposed specimens were more resistant than unexposed specimens as shown by the number of single strand DNA breaks induced by exposure to higher concentrations of Cd (p < 0.001). The comet and the MTT assays indicated that the earthworms with a previous history of Cd exposure have developed increased fitness towards higher doses of Cd, compared to previously unexposed groups. These findings mainly proved that several mechanisms could come into play at the physiological and biochemical level to allow the Cd exposed population to acclimatize to its chemically stressful environment. Clear genetic support for the differences found between the tested populations was not obtained, but needs to be investigated further using Cd selectable markers such as the mt-2 gene, in order to come to a more conclusive deduction.
AFRIKAANSE OPSOMMING: Die moontlike ontwikkeling van geneties gebaseerde weerstand teen kadmium (Cd) by erdwurms van die genus Eisenia, na langtermyn blootstelling aan die metaal by 'n subletale konsentrasie, is ondersoek. Volwasse (klitellate) erdwurms van 'n langtermyn laboratorium Cdblootgestelde bevolking (< 78 generasies) asook van ander bevolkings met geen voorgeskiedenis van metaal blootstelling nie, is blootgestel aan 'n reeks van Cd konsentrasies (0; 2.5; 5; 10; en 20 mg/l) in die vorm van CdSO4. Verskillende biomerkers en molekulêre merkers is gebruik om vas te stel of die erdwurms geakklimeer of aangepas het by die metaal in die gekontamineerde omgewing. Akklimasie is op verskillende fisiologiese en biochemiese vlakke getoets deur die volgende drie biomerkers te gebruik: Die 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromied toets (MTT toets), wat mitochondriale aktiwiteit en sel lewensvatbaarheid meet; die enkel sel elektroforese toets (Komeettoets) wat DNS string breuke meet; die biosintese van metallotioniene (MT's) wat metaalvergiftiging verlaag. Erdwurms van die langtermyn blootstellingsubstraat asook eksemplare van bevolkings wat nie aan kadmium blootgestel was nie, is gebruik. Aanpassing is ondersoek deur gebruik te maak van allosiem polimorfisme, waar 7 ensiem koderende lokusse gebruik is asook van DNS polimorfisme deur neutrale genetiese merkers te selekteer. Die merkers wat gebruik is, was sitochroom c oksidase, subeenheid I (COI) en metallotionien-2 (mt-2) respektiwelik. Hierdie toetse is met dieselfde groepe bevolkings uitgevoer. 'n Bykomende van die studie aspek waar ook van DNS polimorfisme gebruik gemaak is, was daarop gemik om die spesie wat vir die huidige studie gebruik is, geneties te identifiseer en om vas te stel of die erdwurms aan die spesie Eisenia fetida of Eisenia andrei behoort. Die MT biosintese het nie die verwagte data gegenereer nie, hoofsaaklik weens die feit dat geskikte teenligaampies nie beskikbaar was nie (bespreek in Hoofstuk 5 afdeling 5.3.3). Soortgelyk, het die waardebepaling van DNS polimorfisme by die geselekteerde genetiese merker mt-2 nie genoegsame informasie verskaf om die potensiaal van die ontwikkeling van weerstand teen Cd in die langtermyn blootgestelde groep te verstaan nie. COI geenvolgordes van E. fetida en E. andrei wat op Genbank beskikbaar was, is gebruik om met die resultate van die huidige studie te vergelyk. Die spesie wat tydens die huidige studie gebruik is, is op hierdie wyse geïdentifiseer as E. andrei. Allosiem polimorfisme het geen vaste genetiese verskille tussen die langtermyn blootgestelde laboratoriumkulture en die ander bevolkings getoon nie. Al die bevolkings het verskil van die Hardy-Weinberg ewewigstoestand (χ2 > 5.9; p < 0.05) en het 'n lae heterosigositeit per lokus getoon (Ho ≤ 0.21), moontlik as gevolg van inteling. Sellewensvatbaarheid en proliferasie soos getoets met die MTT toets, het getoon dat selomosiete, geïsoleer vanuit die langtermyn Cd blootgestelde groep, die hoogste lewensvatbaarheid (98.42%) gehad het in vergelyking met die ander groepe (+/- 80%). Kruksal-Wallis ANOVA (H2, 225=109.7165 p < 0.001) het getoon dat die langtermyn Cd blootgestelde laboratoriumkultuur 'n beter respons vir akute blootstelling aan Cd gehad het. Hierdeur is gedemonstreer dat hierdie wurms 'n soort toleransie teenoor kadmium ontwikkel het. Soortgelyk het die komeettoets aangetoon dat daar in die langtermyn blootgestelde eksemplare minder DNS breuke voorgekom het na verdere blootstelling aan Cd as in die ander groepe. Van al die komeet parameters wat tydens die studie gemeet is (komeet stertlengte, Olive stert moment en stert DNS persentasie), het die stert DNS persentasie geblyk om die mees sensitiefste te wees, alhoewel al drie parameters aangetoon het dat die langtermyn Cd blootgestelde eksemplare meer weerstandbiedend was teen induksie van DNS enkelstring breuke weens Cd blootstelling (p < 0.001), as die wat nie voorheen blootgestel was nie. Die komeet en MTT toetse het aangetoon dat erdwurms met 'n voorgeskiedenis van Cd blootstelling 'n toenemende fiksheid teen hoër dososse van Cd ontwikkel het as die wat nie voorheen aan kadmium blootgestel was nie. My bevindings kon hoofsaaklik toon dat verskeie meganismes op die fisiologiese en biochemiese vlak 'n rol sou kon speel om Cd blootgestelde bevolkings by 'n chemies stresvolle omgewing te laat akklimeer. Duidelike ondersteuning vir die verskille tussen die getoetsde bevolkings deur van Cd geselekteerde merkers soos die mt-2 geen gebruik te maak om 'n meer finale afleiding te kan maak is nie verkry nie en behoort verder ondersoek te word.
Chapman, Joshua A. "Soil microbial communities from the alimentary canal of the earthworm Lumbricus terrestris (Oligochaeta: lumbricidae)." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4756.
Full textTitle from document title page. Document formatted into pages; contains viii, 75 p. : ill. (some col.), map. Includes abstract. Includes bibliographical references.
Timmenga, Hubert J. "The transport of mineral and organic matter into the soil profile by Lumbricus rubellus Hoffmeister." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27551.
Full textLand and Food Systems, Faculty of
Graduate
Hariri, Abdolrahman Sadeghi. "Evaluation of immune responses and cytological changes in Lumbricus terrestris and Eisenia foetida as assays for xenobiotics." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc798200/.
Full textLangdon, Caroline Juliet. "Relationships between lumbricid earthworms and arsenic-rich mine spoil wastes." Thesis, Lancaster University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274279.
Full textKhan, Farrukh Humayoon Rafique. "Studies on some of the effects of pesticides on earthworms." Thesis, Bangor University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263305.
Full textMcArthur, F. K. "Histology, ultrastructure and immunocytochemistry of the neurosecretory systems of earthworms." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378298.
Full textWhalen, Joann K. "Effects of earthworms on nitrogen flux and transformations in agroecosystems /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487949508372199.
Full textKnorr, David B. "Influence of diet on biomass production of the earthworm Lumbricus terrestris in laboratory culture." Virtual Press, 1992. http://liblink.bsu.edu/uhtbin/catkey/845951.
Full textDepartment of Natural Resources
Sassani, Ramin. "Toxicity of Polychlorinated Biphenyls (Aroclor 1254) on the Earthworm Eisenia foetida." Thesis, University of North Texas, 1991. https://digital.library.unt.edu/ark:/67531/metadc500593/.
Full textPrieto, Roberto. "The role of earthworms in nitrous oxide emissions from forage agroecosystems." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103783.
Full textLes émissions d'oxyde nitreux (N2O) provenant de sols agricoles contribuent à l'effet de serre, à la destruction de la couche d'ozone et à la formation de pluies acides. Des études en laboratoire ont démontré que, lorsque le sol est en contact avec des vers de terre, celui-ci présente des niveaux plus élevés de flux de N2O que lorsqu'il n'y a pas de verres de terre présents. Un taux élevé de N2O se produit lorsque les micro-organismes nitrifiants et/ou dénitrifiants sont activés. Pourtant, les études publiées sur les essais aux champs n'ont pas été concluantes quant aux niveaux de N2O attribuables à la présence de vers de terre. Les objectifs de ce mémoire étaient : (1) sur le terrain, de déterminer l'incidence des quantités élevées de vers de terre anéciques et endogés sur les niveaux de flux de N2O dans les chambres avec et sans légumineuses, (2) en laboratoire, de définir les agents bactériologiques dénitrificateurs, et (3) de quantifier le taux de dénitrification des structures associées aux vers de terre, incluant intestins, turriculés, tubes et tertres du ver de terre anécique Lumbricus terrestris. Selon les études effectuées sur le terrain, lorsqu'il y avait une présence accrue de vers de terre, les niveaux de N2O augmentaient de façon importante (P<0,05), mais seulement dans les chambres avec des légumineuses. Les espèces anéciques semblaient avoir un effet plus important sur les émissions de N2O. Le modèle de régression linéaire des données relatives aux niveaux de N2O et à la quantité de vers de terres ajoutés était significative (P<0,05) ; en moyenne, les vers de terre émettaient 335 ng N2O m-2 h-1 lorsque l'humidité du sol dans les chambres avec légumineuses excédait 60% de l'espace poral irrigué. Lors de l'étude en laboratoire, une analyse de 454 pyroséquençage portant sur la diversité et la phylogénie des fragments génétiques de la bactérie nosZ (codification de réductase de N2O) a révélé un ensemble de 39 unités taxonomique opérationel (UTOs) unique, dont 14 identifiées dans les intestins du ver de terre. Les intestins semblent contenir un ensemble unique de bactéries dénitrificatrices endémiques. Une analyse au blocage à l'acétylène a démontré que le ver de terre lui-même présentait le potentiel le plus élevé de dénitrification, soit 2,67 µg N2O-N g sol-1 h-1, valeur nettement supérieure (P<0,05) à celles du sol brut et des autres structures de vers de terre, à l'exception des turriculés frais. Les turriculés frais indiquaient un taux moyen de dénitrification de 0,94 µg N2O-N g sol-1 h-1, donc plus élevé (P<0,05) que le taux de turriculés vieillis et du sol brut. L'ensemble distinct de dénitrificateurs intestinaux est très actif de par leurs conditions favorables dans les intestins, dont l'anoxie et le substrat de qualité. Lorsque les structures de vers de terre anéciques sont fraîches, celles-ci deviennent des endroits propices favorisant la dénitrification du sol. Ce mémoire affirme l'importance de l'interaction entre les verres de terre et les microorganismes dénitrifiants quant aux émissions de N2O, en particulier dans les agroécosystèmes de légumineuses. Ces interactions devraient être prises en compte lors du développement de modèles de prévision des émissions de gaz à effet de serre provenant des sols agricoles.
Moody, Sandra Ann. "Aspects of dispersal of wheat staw fungi by earthworms and springtails." Thesis, Lancaster University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333533.
Full textClasper, Paula Jeanette. "The effects of paper mill sludge on earthworms and soil microorganisms." Thesis, Lancaster University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429963.
Full textSpring, Christian Alexander. "The effects of earthworms on soil structure in an upland grassland." Thesis, University of Stirling, 2003. http://hdl.handle.net/1893/3538.
Full textBraga, Lucas Palma Perez. "Disentangling the influence of earthworms on microbial communities in sugarcane rhizosphere." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/64/64133/tde-26052017-100757/.
Full textAo longo dos últimos 150 anos muitos estudos têm demonstrado a importância das minhocas para o crescimento de plantas. Porém o exato mecanismo envolvido neste processo ainda é muito pouco compreendido. Muitas funções importantes necessárias para o crescimento de plantas podem ser realizadas pela comunidade microbiana da rizosfera. Para investigar a influência das minhocas na comunidade microbiana da rizosfera, foi desenvolvido um experimento de macrocosmo com cana-de-açúcar com e sem Pontoscolex corethrurus (EW+ e EW-, respectivamente) seguindo diversos procedimentos por 217 dias. No Segundo capítulo da tese é demonstrado que no tratamento EW+, as concentrações de N2O dentro do solo (15 cm profundidade) e a abundância relativa dos genes óxido nitroso redutase (nosZ) foram elevadas no solo e na rizosfera, sugerindo que microrganismos do solo foram capazes de consumir a emissão de N2O induzida pelas minhocas. O sequenciamento do DNA total revelou que aproximadamente 70 funções microbianas no solo e na rizosfera apresentaram diferenças entre os tratamentos EW+ e EW-. No geral, genes associados a biossíntese e proliferação de células foram enriquecidos em EW+, sugerindo uma influencia positiva por parte das minhocas. Na rizosfera EW+, funções associadas a simbiose entre planta e microrganismos foram relativamente enriquecidas comparado com rizosfera EW-. Modelos de rede de interação ecológica revelam menor número de diversificação de nichos e aumento de funções importantes como um efeito derivado da influência das minhocas. A biomassa das plantas foi aumentada no tratamento EW+ e a população de minhocas proliferou. Considerando que as minhocas contribuíram com o aumento de nutrientes, foi avaliado no capítulo três a resposta do resistoma presente nas comunidades microbianas dos solos do experimento. Mecanismos de resistência contra compostos antimicrobianos parecem ser características obrigatórias para a ecologia e evolução de procariotos. Entretanto, a maior parte dos estudos sobre genes de resistência tem sido conduzida em condições artificiais utilizando fontes antropogênicas de antibióticos em comunidades microbianas muito específicas como por exemplo o microbioma animal. Para resolver por que e como a resistência evolui, é importante estudar genes de resistência a antibióticos (GRA) (i.e., resistoma) no seu ambiente natural e entender seu papel ecofisiologico no ambiente. Os resultados demonstraram que minhocas influenciaram a mudança na composição de GRA no solo e na rizosfera. Tratamentos EW+ apresentaram maior número de correlações negativas entre ARG e grupos taxonômicos. A medida de centralidade diferencial (DBC=nBCEW+ - nBCEW-) comparando os modelos de rede de interações obtidos mostrou que a composição e o nível de importância dos indivíduos mais influentes é alterado nos tratamentos EW+ comparado com EW-. Além disso, por meio de uma análise de redundância (RDA) foi demonstrado que as alterações na abundancia relativa de GRA podem ser explicadas pelas alterações verificadas em grupos taxonômicos
Giai, Carla. "Fire, Exotic Earthworms and Plant Litter Decomposition in the Landscape Context." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1236626931.
Full textWan, Hon Chi Judy. "Interaction of earthworms and microorganisms on nutrient availability and crop growth." HKBU Institutional Repository, 2004. http://repository.hkbu.edu.hk/etd_ra/588.
Full textMcDonald, Jennifer C. Venables Barney J. "Bacterial challenge in Lumbricus terrestris a terrestrial invertebrate immunotoxicity model /." [Denton, Tex.] : University of North Texas, 2007. http://digital.library.unt.edu/permalink/meta-dc-3640.
Full textDempsey, Mark A. "Exotic earthworms and soil microbial community composition in a northern hardwood forest." Miami University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1259958575.
Full textDempsey, Mark Austin. "Exotic earthworms and soil microbial community composition in a northern hardwood forest." Oxford, Ohio : Miami University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1259958575.
Full textHerring, Reese. "Modulation of the Coelomic Fluid Protein Profile in the Earthworm, Lumbricus Terrestris, After Exposure to Copper as Copper Sulfate." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28428/.
Full textRodriguez, Grau Jorge Luis. "Suppression of Immune Functions by PCBs in the Earthworm Lumbricus terrestris." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc798391/.
Full textEyambe, George Sona. "Cellular Biomarkers for Measuring Toxicity of Xenobiotics: Effects of PCBs on Earthworm Lumbricus Terrestris Coelomocytes." Thesis, University of North Texas, 1991. https://digital.library.unt.edu/ark:/67531/metadc332716/.
Full textHorswell, Jacqueline. "Investigation of approaches to accelerate atrazine mineralisation in soil." Thesis, University of Aberdeen, 1997. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU094707.
Full textCarpenter, Daniel. "The role of earthworms in the chemical and physical weathering of soil minerals." Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496963.
Full textSchermaier, Anton Francis. "INFLUENCE OF EARTHWORMS ON PLANT AND SOIL INVERTEBRATE COMMUNITIES OF THE CLEVELAND METROPARKS." Cleveland State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=csu1367843264.
Full textZelles, Alexandra M. "Examining the relationship between garlic mustard (Alliaria petiolata) and European earthworms." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1348589345.
Full textCardozo-Tacaná, José. "Impact of six cropping sequences on soybean cyst nematode, soil arthropods, and earthworms /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9809665.
Full textLeland, Jarrod Ethan. "Evaluating the Hazard of Land Applying Composted Diazinon Waste Using Earthworm Biomonitoring." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/10079.
Full textMaster of Science
Dalby, Paul Reginald. "Competition between earthworms in high rainfall pastures in the Mt. Lofty Ranges, South Australia." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phd137.pdf.
Full textPham, Quang. "Relationships between functional traits, bioturbation and water transfers of earthworms sampled in northern Vietnam." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS606.pdf.
Full textEarthworms are known to play a major role in soil structure formation and maintenance through the production of casts and burrows with consequences on soil water transfers. However, most of the literature is based on Lumbricidae species, while the most diverse family, the Megascolecidae, is comparatively understudied Therefore, this thesis aimed at providing a better understanding of the impact of tropical earthworms from the Megascolecidae family on soil structure and water transfers, particularly using their morpho-anatomical traits as a proxy.To do so, two experiments were conducted in laboratory conditions. In the first, 23 earthworm species were sampled in northern Vietnam and their morpho-anatomical traits were measured. Earthworms were assigned into four ecological categories based on the morpho-anatomical traits selected by Bottinelli et al. (2020) for Lumbricidae species. Earthworms were incubated in mesocosms and the whole drilosphere (i.e., volume of surface and belowground casts, empty burrows and lateral soil compaction and bulk density of casts and the lateral compaction) was characterized by X-ray computed tomography. In addition, the soil water infiltration was measured. In the second experiment, the individual and interactive effect of the anecic Amynthas zenkevichi and the endogeic Pontoscolex corethrurus on soil structure and resultant effects on water transfers were investigated. Burrow systems were characterized using X-ray tomography and soil water transfers were characterized in terms of water infiltration, evaporation, and moisture.Results of the first experiment showed (i) a good match between the volume of the different parts of the drilopshere and the four ecological categories, whereas differences were less clear for the bulk density of casts or at the vicinity of burrows; (ii) earthworms had no or a positive effect on soil water infiltration without clear distinction between the four ecological categories; (iii) the possible use of both morpho-anatomical traits and machine learning to predict the impact of earthworms on soil water infiltration and bulk density variations of the drilosphere. Results of the second experiments showed that the presence of A. zenkevichi and P. corethrurus species together had a slight, synergistic, positive effect on soil resistance to water loss by evaporation.To conclude, this thesis showed that tropical earthworms can be assigned into ecological categories, but links with soil functioning can somehow be wrong. This thesis highlights new avenues of research based on effect traits, that can be used to identify the effects of tropical earthworms on soil structure and water infiltration
Farenhorst, Annemieke. "Influence of earthworms (Lumbricus terrestris L.) on the dissipation and distribution of herbicides in soil." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ35154.pdf.
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