Dissertations / Theses on the topic 'Litter production and decomposition'
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Jali, Dulima Binti. "Nitrogen mineralisation, litter production and cellulose decomposition in tropical peat swamps." Thesis, Royal Holloway, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269744.
Full textEnriquez, Luis Villavicencio. "The role of canopy structure in leaf litter production, quality and decomposition in rustic and traditional coffee systems and forests in Mexico." Thesis, Bangor University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510270.
Full textAltinalmazis, kondylis Andreas. "Tree diversity effects on root production, decomposition and nutrient cycling under global change." Thesis, Bordeaux, 2021. http://www.theses.fr/2021BORD0067.
Full textThe insurance hypothesis predicts that forests with tree species mixtures may resist better to stressful environmental conditions than forests composed of only one tree species. Most of the currently available literature tested this hypothesis for aboveground productivity and its related response variables, but less is known about belowground processes. In my PhD thesis, I studied the drivers of belowground productivity and decomposition across climatic gradients and how they are affected by tree mixtures. I hypothesized that mixing of tree species with contrasting rooting patterns and fine root morphologies, would result in a release of competitive pressure belowground, and translate into higher fine root standing biomass and increased fine root productivity. Moreover, I hypothesized that roots with contrasting chemical and morphological characteristics in mixed stands would decompose faster, which may be particularly important under nutrient-limited conditions. Under water-limiting conditions, such as during extreme summer drought, I hypothesized overall slower decomposition but an attenuating effect of tree mixtures on decomposition due to improved micro-environmental conditions, in particular for leaves, since roots decompose in a more buffered soil environment. To test these hypotheses I examined the variation in tree root functional traits (across- and within-species), and its consequences for fluxes of C, N and P at the ecosystem scale. I addressed three main objectives and associated research questions to quantify the interactive effect of tree mixtures and climate on: 1) vertical root segregation and fine root standing biomass, 2) fine root dynamics and their associated nutrient fluxes and 3) fine root- and leaf litter decomposition. I could benefit from two different field experiments for my work, one with a 10-year-old tree-plantation experiment with birch and pine close to Bordeaux (ORPHEE experiment), the second along a latitudinal gradient of mature beech forests in the French Alps (BIOPROFOR experiment).I observed that roots from the birch and pine tree-plantation showed similar vertical distribution and similar belowground root standing biomass in tree mixtures compared to monocultures, contrary to my first hypothesis. However, the greater allocation of pine but not of birch to root growth within the top soil horizons under less water-limiting conditions suggests locally favourable conditions that may lead to soil depth-specific asymmetric competition. In the same experiment, fine root production and decomposition were similar in mixtures and in monocultures, in contradiction with my second hypothesis. Moreover, I did not observe any interactive effects of tree mixtures with stand density or water availability. Interestingly though, birch roots, but not pine roots released P during root decomposition, which suggests an important role of birch in the P-cycle and for P nutrition of trees on these P-limited sandy soils. In line with my third hypothesis, I observed a slower decomposition of leaf litter and fine roots in response to reinforced and prolonged summer drought, irrespective of the position along the latitudinal gradient in the Alps. However, this slower decomposition under drought was not attenuated in forest stands with mixed tree species compared to single species stands. Compared to leaf litter, fine roots decomposed slower and released less C. Interestingly, I found a net N release in decomposing fine roots but not in decomposing leaf litter, which suggests a distinct role of fine roots in the N cycle. In conclusion, I found that mixing tree species did not attenuate negative effects of climate change. However, this thesis demonstrates that promoting mixtures can still be beneficial for at least one of the admixed tree species, through species addition (i.e., complementing one tree species with another tree species), as one tree species may facilitate another via belowground fluxes of N and P
Sangha, Kamaljit Kaur, and Kamaljit kaur@jcu edu au. "Evaluation of the effects of tree clearing over time on soil properties, pasture composition and productivity." Central Queensland University. School of Biological and Environmental Sciences, 2003. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060921.115258.
Full textLaliberté, Etienne. "Land-Use Intensification in Grazing Systems: Plant Trait Responses and Feedbacks to Ecosystem Functioning and Resilience." Thesis, University of Canterbury. School of Forestry, 2011. http://hdl.handle.net/10092/5109.
Full textGrugiki, Marilia Alves. "Ciclagem de nutrientes em coberturas florestais no sul do Espírito Santo." Universidade Federal do Espírito Santo, 2011. http://repositorio.ufes.br/handle/10/5801.
Full textEste trabalho teve como objetivo geral avaliar a dinâmica de nutrientes e sua relação com o aporte, decomposição e mineralização da serapilheira nas coberturas florestais de floresta secundária, Sapindus saponaria, Acacia mangium e Hevea brasiliensis na região sul do estado do Espírito Santo. A deposição da serapilheira foi quantificada instalando 3 coletores (50 x 50 cm), em cada cobertura florestal. O material interceptado pelos coletores foi mensalmente coletado durante o período de janeiro a outubro de 2010. Para a quantificação do acúmulo de serapilheira no solo foi utilizado um gabarito de 0,33 x 0,33 m nos meses de novembro/2009, março/2010, junho/2010 e novembro/2010. Tanto no estudo de deposição de serapilheira como no de acúmulo, as amostras de serapilheira coletadas foram levadas para laboratório onde foram secas em estufa e pesadas, sendo em seguida determinados os teores e estoques de Ca, Mg, P e K. A decomposição da serapilheira foi quantificada através de litter bags coletados em cada cobertura florestal. O material remanescente em cada litter bags foi coletado em diferentes períodos de tempo onde foram pesados para obtenção da matéria seca. Para a avaliação da atividade microbiana, procedeu-se a quantificação do CO2 (C mineralizável). Os resultados experimentais mostraram que as coberturas florestais se comportaram de forma diferenciada quanto à deposição e acúmulo de serapilheira, com destaques para a Acacia mangium que, na época seca, proporcionou maior deposição de serapilheira total e para a seringueira, que dentre as coberturas florestais, foi a que apresentou desempenho inferior tanto para a deposição quanto para o acúmulo de serapilheira. Dentre os nutrientes avaliados na serapilheira depositada e acumulada, o teor de fósforo não variou entre as coberturas florestais, o mesmo ocorrendo para o teor de potássio na fração folhas e de magnésio na fração não-folhas da serapilheira depositada. O acúmulo de nutrientes foi mais influenciado pela produção de serapilheira do que pelos teores de nutrientes na serapilheira. A Acacia mangium, juntamente com a floresta secundária, apresentaram, de maneira geral, valores superiores e a seringueira, os menores valores. Quanto à decomposição, os resultados experimentais mostraram que as coberturas florestais se comportaram de forma diferenciada quanto à decomposição e atividade microbiana, com destaques para a Sapindus saponaria que, apresentou maior velocidade de decomposição de serapilheira total e para a seringueira, que dentre as coberturas florestais, foi a que apresentou velocidade de decomposição inferior em relação às outras coberturas. O conteúdo de nutrientes liberados na decomposição da serapilheira apresentou comportamento decrescente ao decorrer dos dias. A cobertura de Sapindus saponaria, apresentou para as duas profundidades, quantidades acumuladas de CO2 superiores em relação às outras coberturas florestais. A cobertura de Acacia mangium apresentou os menores valores de CO2 acumulado. Para este estudo, dentre os parâmetros avaliados, o acúmulo de nutrientes e a produção de serapilheira acumulada e ix depositada mostraram-se como importantes indicadores para avaliação de ciclagem de nutrientes em coberturas florestais
This study aimed to assess the overall nutrient dynamics and their relationship with the input, decomposition and mineralization of litter in the forest canopy of secondary forest, Sapindus saponaria, Acacia mangium and Hevea brasiliensis in the southern state of Espírito Santo. The deposition of litter was measured by installing three collectors (50 x 50 cm) in each forest cover. The material was intercepted by collectors collected monthly during the period from January to October 2010. To quantify the accumulation of litter in the soil was used a template 0.33 x 0.33 m in the months of November/2009, March/2010, November/2010 and June/2010. Both the study of deposition of litter accumulation as in the samples of litter were taken to the laboratory where they were oven dried and weighed, and then determined the levels and stocks of Ca, Mg, P and K. The decomposition of leaf litter was measured using litter bags collected in each forest cover. The remaining material in each litter bags were collected at different periods of time they were weighed to obtain dry matter. For the assessment of microbial activity, proceeded to quantify the CO2 (mineralizable C). The experimental results showed that the forest cover behaved differently regarding the deposition and accumulation of litter, with emphasis on Acacia mangium that, in the dry season, provided greater total litter deposition and rubber, that among the forest canopy, showed the lower performance for both the deposition and to the accumulation of litter. Among the nutrients in litterfall and accumulated phosphorus content did not vary between forest cover, and so on for the potassium content in leaves and magnesium fraction in the fraction of non-leaf litterfall. The accumulation of nutrients was more influenced by litter production than by the nutrient content in the litter. Acacia mangium, together with the secondary forest showed, in general, higher values and rubber, the lowest values. As for the decomposition, the experimental results showed that the forest cover behaved differently in terms of decomposition and microbial activity, with highlights for Sapindus saponaria that had a higher rate of decomposition of total litter and rubber, that among the forest cover, showed the lower rate of decomposition in relation to other coverage. The content of nutrients released in the decomposition of litter produced the downward trend over the day. The coverage of Sapindus saponaria presented for two depths, higher amounts of CO2 accumulated in relation to other forest cover. Coverage of Acacia mangium showed the lowest values accumulated CO2. For this study, among the parameters evaluated, the accumulation of nutrients and the production of litter accumulated and deposited proved as important indicators for assessing nutrient cycling in forest cover
Sariyildiz, Temel. "Biochemical and environmental controls of litter decomposition." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312079.
Full textYin, Na. "Mechanism of Positive, Non-Additive Litter Decomposition." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8564.
Full textAlmeida, R. de. "Nutrient and litter decomposition in a beechwood ecosystem." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354800.
Full textJoly, François-Xavier. "Tree diversity and litter decomposition in European forests." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS215.
Full textForest ecosystems play a key role in regulating the global carbon (C) and nutrient cycles, and the ongoing erosion of biodiversity is susceptible to modify these ecosystem functions. Over the past two decades, a strong research effort was put into the understanding of how changing biodiversity impacts primary productivity. The reverse process of respiratory C loss during organic matter breakdown however, remained much less studied. In this PhD thesis, I aimed at teasing apart the different mechanisms of how tree and associated leaf litter diversity may affect litter decomposition in European forest ecosystems using three distinct approaches.First, using a network of forest plots with tree diversity gradients in six major forest types across Europe, I studied the effects of tree diversity on litter decomposition through (i) modifications of the decomposition environment and (ii) the direct consequences of leaf litter diversity, with two litterbag experiments. Across all sites, while tree species richness had only a limited effect, forest canopy closure affected decomposition positively by potentially improving microclimatic conditions. In addition, mean chemical and physical quality traits of the litterfall, and trait dissimilarity in leaf litter from different species influenced decomposer communities in a way that decomposition of the common substrates was predictable to a reasonable degree. Once these effects were accounted for, the quality of decomposing litter showed an additional, but comparatively small impact. Collectively, these results suggest that the indirect effects of tree diversity on decomposition through microenvironmental controls are more important than the direct effects of the inherent quality of decomposing litter.With a second approach using microcosms under controlled-conditions, I aimed at assessing the role of soluble compounds leached from decomposing litter of different species for microbial-driven soil processes. Leachates from litter of broadleaved deciduous species differed in composition and quantity and induced stronger soil microbial respiration than those from litter of coniferous species. When the species-specific leachates were mixed, I observed non-additive mixing effects on soil microbial processes associated to the dissimilarity in leachate stoichiometry. Since leaching is the dominant process during the initial stage of decomposition, litter leachate identity and diversity may significantly contribute to the control of carbon and nutrient cycling.Finally, in a third approach my goal was to better understand the underlying mechanisms of the observed strong effects of soil detritivores on litter decomposition and diversity effects. I investigated whether the transformation of litter into feces by the detritivore Glomeris marginata stimulated microbial decomposers, and whether this stimulation depended on the quality of the ingested litter. Microbial activity was stimulated in feces derived from recalcitrant litter, but not in feces derived from litter of higher initial quality. In conclusion, the consequences of litter transformation into macroarthropod feces for microbial decomposers is litter species-specific which may further contribute to litter diversity effects.The data collected during my PhD thesis shows that the functional diversity of trees can affect litter decomposition through various mechanisms during different stages of decomposition. As a result of this complexity, the consequences of changes in biodiversity for the carbon and nutrient cycles in European forests can be substantial, but are presently difficult to predict and to generalize
Magnusson, Rebecca. "Effects of litter quality and latitude on decomposition." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-137763.
Full textSchindler, Markus. "Effects of litter diversity, leaf quality and water chemistry on litter decomposition in streams /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16789.
Full textZukswert, Jenna Michelle. "How well do plant functional traits and leaf-litter traits predict rates of litter decomposition?" Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57698.
Full textForestry, Faculty of
Graduate
Baroudi, Robby Hassan. "Interactive Effects of Litter Quality and Invertebrates on Litter Decomposition Rates Across a Successional Gradient." Bowling Green State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1467656636.
Full textBalcer, Natalie. "Litter decomposition and phosphorus release in Okeechobee isolated wetlands." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0016520.
Full textSmaill, Simeon John. "The Decomposition of Nothofagus fusca Floral and Bark Litter." Thesis, University of Canterbury. Biological Sciences, 2001. http://hdl.handle.net/10092/1372.
Full textLidman, Johan. "Decomposition of leaf litter in headwater streams. : Effects of changes in the environment and contribution of microbial and shredder activity on litter decomposition." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105488.
Full textDale, Sarah Elizabeth. "Leaf litter decomposition in tropical forests : disentangling leaf litter quality, soil nutrients, climate and microbial decomposers." Thesis, Lancaster University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658223.
Full text梁慶祥 and Hing-cheung Leung. "Aspects of leaf litter decomposition in Kandelia candel (L.) Druce." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207728.
Full textOsono, Takashi. "Fungal decomposition of leaf litter in a cool temperate forest." Kyoto University, 2002. http://hdl.handle.net/2433/78146.
Full textLeung, Hing-cheung. "Aspects of leaf litter decomposition in Kandelia candel (L.) Druce /." [Hong Kong : University of Hong Kong], 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12326082.
Full textEvans, Alison. "The impact of selective beech (Nothofagus spp.) harvest on litter-dwelling invertebrates and the process of litter decomposition." Lincoln University, 1999. http://hdl.handle.net/10182/1717.
Full textNason, Mark A. "Decomposition of tree leaf litter and formation of soil organic matter." Thesis, Bangor University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409217.
Full textMohammed, Askia Musah. "Biomass, carbon, nutrient stocks and litter decomposition in Ghanain cocoa ecosystems." Thesis, University of Reading, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.625496.
Full textDray, Matthew William. "Effects of multiple environmental stressors on litter chemical composition and decomposition." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/68365/.
Full textGiai, 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 textSuzuki, Yoriko. "The effects of millipedes (Harpaphe haydeniana) on microbial decomposition of leaf litter." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/41623.
Full textCotrufo, Maria Francesca. "Effects of enriched atmospheric concentration of carbon dioxide on tree litter decomposition." Thesis, Lancaster University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282385.
Full textLevi, Eva Marie, and Eva Marie Levi. "Foliar and Woody Litter Decomposition in a Shrub-Invaded Sonoran Desert Grassland." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/623065.
Full textKirkwood, Donovan. "An experimental test of the importance of litter and soil type in the decomposition of five fynbos biome litter types." Thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/26050.
Full textNeatrour, Matthew Aaron. "The Role of Floods in Particulate Organic Matter Dynamics of a Southern Appalachian River/Floodplain Ecosystem." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/34913.
Full textMaster of Science
Lukumbuzya, T. K. (Tadde Kahana). "Effects of base cation fertilization on litter decomposition in a sugar maple forest." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68207.
Full textPotassium appeared to be rapidly leached, whereas Ca and Mg were released at rates more closely related to litter mass loss. Nitrogen was mineralized from N-rich Arboretum litter only; all other litters immobilized N. Release of Ca and Mg was reduced significantly on fertilized plots. Large soil fauna enhanced Ca release, while they delayed N-mineralization in Arboretum litter.
Wookey, Philip Andrew. "Effects of dry deposited sulphur dioxide on the decomposition of forest leaf litter." Thesis, Lancaster University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328496.
Full textThoman, Heather Marie. "A Critical Temperature Threshold for Early Leaf Litter Decomposition and Microbial Enzyme Activity." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1399571419.
Full textVan, der Ham Ilana. "The effect of inorganic fertilizer application on compost and crop litter decomposition dynamics in sandy soil." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97109.
Full textENGLISH ABSTRACT: Inorganic fertilizer applications are common practice in commercial agriculture, yet not much is known regarding their interaction with organic matter and soil biota. Much research has been done on the effect of inorganic N on forest litter decomposition, yet very little research has focused on the effect of inorganic fertilizers on crop litters and, to our knowledge, none on composted organic matter. Furthermore none of the research has been done in South Africa. The main aim of this research project was to determine the effect of inorganic fertilizer applications on the decomposition of selected organic matter sources commonly used in South African agriculture and forestry. Two decomposition studies were conducted over a 3-month period, one on composts and the other on plant litters, using a local, sandy soil. In the first experiment a lower quality compost, compost A (C:N ratio, 17.67), and higher quality compost, compost B (C:N ratio, 4.92) was treated with three commercially used fertilizer treatments. Two were typical blends used for vegetable (tomato and cabbage) production: tomato fertilizer (10:2:15) (100 kg N, 20 kg P, 150 kg K per ha) and cabbage fertilizer (5:2:4) (250 kg N, 100 kg P, 200 kg K per ha). The third fertilizer blend, an equivalent mass application of N and P applied at 150 kg of each element per ha, is more commonly used in pastures. In the second experiment, five commonly encountered crop and forestry litters, namely kikuyu grass, lucerne residues, pine needles, sugar cane trash and wheat straw, were selected to represent the labile organic matter sources. The litters were treated with the tomato and cabbage fertilizer applications rates. Both decomposition experiments were conducted under ambient laboratory conditions at field water capacity. Decomposition rates were monitored by determining CO2 emissions, DOC production, β-glucosidase and polyphenol oxidase activity (PPO). At the start and end of decomposition study, loss on ignition was performed to assess the total loss of OM. Based on the results obtained from these two experiments, it was concluded that the addition of high N containing inorganic fertilizers enhanced the decomposition of both composted and labile organic matter. For both compost and plant litters, DOC production was greatly enhanced with the addition of inorganic fertilizers regardless of the organic matter quality. The conclusion can be made that inherent N in organic matter played a role in the response of decomposition to inorganic fertilizer application with organic matter low in inherent N showing greater responses in decomposition changes. For labile organic matter polyphenol and cellulose content also played a role in the responses observed from inorganic fertilizer applications.
AFRIKAANSE OPSOMMING: Anorganiese kunsmis toedieningss is algemene praktyk in die kommersiële landbou sektor,maar nog min is bekend oor hul interaksie met organiese materiaal en grond biota. Baie navorsing is reeds oor die uitwerking van anorganiese N op woud en plantasiereste se ontbinding gedoen. Baie min navorsing het gefokus op die uitwerking van anorganiese kunsmis op die gewasreste en tot ons kennis, is daar geen navorsing gedoen op die invloed van anorganiese kunsmis op gekomposteer organiese material nie. Verder is geeneen van die navorsing studies is in Suid-Afrika gedoen nie. Die hoofdoel van hierdie navorsingsprojek was om die effek van anorganiese kunsmis toedienings op die ontbinding van geselekteerde organiese materiaal bronne, wat algemeen gebruik word in die Suid-Afrikaanse landbou en bosbou, te bepaal. Twee ontbinding studies is gedoen oor 'n 3-maande-tydperk, een op kompos en die ander op die plantreste, met die gebruik van 'n plaaslike, sanderige grond. In die eerste eksperiment is ‘n laer gehalte kompos, kompos A (C: N verhouding, 17.67), en 'n hoër gehalte kompos, kompos B (C: N verhouding, 4.92) met drie kommersieel anorganiese bemesting behandelings behandel. Twee was tipiese versnitte gebruik vir die groente (tamatie en kool) produksie: tamatie kunsmis (10: 2:15) (100 kg N, 20 kg P, 150 kg K per ha) en kool kunsmis (5: 2: 4) (250 kg N, 100 kg P, 200 kg K per ha). Die derde kunsmis versnit was 'n ekwivalente massa toepassing van N en P van 150 kg van elke element per ha, wat meer algemeen gebruik word in weiding. In die tweede eksperiment was vyf algemeen gewas en bosbou reste, naamlik kikoejoegras, lusern reste, dennenaalde, suikerriet reste en koring strooi, gekies om die labiele organiese materiaal bronne te verteenwoordig. Die reste is met die tamatie en kool kunsmis toedienings behandel. Beide ontbinding eksperimente is uitgevoer onder normale laboratorium toestande by veldwaterkapasiteit. Ontbinding tempo is deur die bepaling van die CO2-vrystellings, opgelosde organiese koolstof (OOK) produksie, β-glukosidase en polifenol oksidase aktiwiteit (PPO) gemonitor. Aan die begin en einde van ontbinding studie, is verlies op ontbranding uitgevoer om die totale verlies van OM te evalueer. Gebaseer op die resultate van hierdie twee eksperimente, was die gevolgtrekking dat die toevoeging van hoë N bevattende anorganiese bemestingstowwe die ontbinding van beide komposte en plant reste verhoog. Vir beide kompos en plantreste word OOK produksie verhoog met die toevoeging van anorganiese bemesting, ongeag van die organiese materiaal gehalte. Die gevolgtrekking kan gemaak word dat die inherente N in organiese materiaal 'n rol gespeel het in die reaksie van ontbinding op anorganiese bemesting toedienings met die grootste reaksie in organiese material laag in inherente N. Vir labiele organiese material het polifenol en sellulose inhoud ook 'n rol gespeel in die reaksie waargeneeming op anorganiese bemesting.
Swarts, Derek Juan. "Soil community structure and litter decomposition under irrigated Eucalyptus Globulus in South Western Australia." Connect to thesis, 2006. http://portal.ecu.edu.au/adt-public/adt-ECU2006.0051.html.
Full textSchmidt, John Michael. "Litter Decomposition in Created and Adjacent Forested Wetlands of the Coastal Plain of Virginia." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/43580.
Full textMaster of Science
Herman, John E. "Linking Microbial Community Dynamics to Litter and Soil Chemistry: Understanding the Mechanisms of Decomposition." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1278500390.
Full textEsquivel, Sheik M. Jimena. "Plant traits and litter decomposition of tree species naturally regenerating in Central America pasturelands." Thesis, Bangor University, 2013. https://research.bangor.ac.uk/portal/en/theses/plant-traits-and-litter-decomposition-of-tree-species-naturally-regenerating-in-central-america-pasturelands(0fd2446f-b38f-45b9-b2bf-d60fd4467b63).html.
Full textSwarts, Derek J. "Soil community structure and litter decomposition under irrigated Eucalyptus Globulus in South Western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2006. https://ro.ecu.edu.au/theses/100.
Full textHetherington, Sarah Louise. "The responses of soil processes at upland boundaries and their role in ecosystem dynamics." Thesis, University of Essex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302562.
Full textSkene, Trudi Marie. "The influence of inorganic matrices on the decomposition of organic materials." Title page, contents and summary only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phs6271.pdf.
Full textCoufal, Craig Daniel. "Quantification of litter production and the fate of nitrogen in commercial broiler production systems." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2626.
Full textMontemarano, Justin Joseph. "Biotic controls of decomposition dynamics in aquatic systems." Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1370539247.
Full textBell, Michael Christopher. "The direct and indirect role of climate in regulating litter decomposition processes in blanket peatlands." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/73486/.
Full textHesselschwerdt, John [Verfasser]. "Impacts of invasive amphipods on the local benthic fauna and leaf litter decomposition / John Hesselschwerdt." Konstanz : Bibliothek der Universität Konstanz, 2009. http://d-nb.info/1020366109/34.
Full textCuke, Melissa Erin. "Losses of rare forest invertebrates and divergent rates of litter decomposition under different land uses." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/41564.
Full textRossi, Florent. "Leaf Litter decomposition in streams subjected to global change : the role of heterotrophic microbial communities." Thesis, Université Clermont Auvergne (2017-2020), 2018. http://www.theses.fr/2018CLFAC101.
Full textHuman activity through industry, urbanization and agriculture, has led to the production and release of a large amounts of chemical compounds (including pesticides and pharmaceuticals) into the biosphere. One of the problematic related to the xenobiotic compounds fate is their transfer to aquatic ecosystems and the alteration of diversity and activity of microbial communities. Microbial communities associated with immersed leaf-litter can be impacted by these compounds, and in turn, alter global processes such as the carbon and nutrient cycling in the stream ecosystem. Accordingly, this thesis work aims to assess the effects of realistic chemical contamination on microbial leaf-litter decomposition process in streams.The first chapter of this thesis was focused on the comparison of microbial decomposition activity in alder leaves in six watersheds presenting different land uses (agricultural, urbanized, forested) over four seasons (spring, summer, autumn, winter). The effect of the gradient of contamination on microbial organic matter processing from upstream to downstream sections in each watershed was also assessed. Monitoring revealed that microbial decomposition of leaves was slightly higher in contaminated watersheds (agricultural and urbanized) in comparison with control ones (forested), probably because of the compensation effect by nutrients over xenobiotics. However, this compensation mechanism was partial since fungal biomass accumulated in leaves was greatly reduced in contaminated watersheds. Overall, this highlights microbial communities being more efficient for leaf decomposition in polluted watersheds than in the less contaminated ones, which is probably explained by changes in microbial community structure.The second chapter of this thesis aimed to evaluate in vitro the specific interactions between nutrients (nitrogen and phosphorus) and pesticides (herbicide and fungicide, alone or in mixture) exposure on microbial communities during leaf-litter decomposition. High nutrient concentrations (eutrophic conditions) tended to exacerbate the effects of pesticides on leaf decomposition rates suggesting that the compensatory mechanism of nutrients over pesticides observed in the previous part is probably concentration dependent and does not always apply to aquatic microbial communities. Moreover, a stimulation in laccase activity was observed when microbial communities were exposed to the fungicide, suggesting a role of this enzyme in detoxification mechanisms. However, the fact that such stimulation was not observed when exposed to the mixture of both pesticides (herbicide and fungicide) suggest that the interaction between these two molecules impaired the ability of microbial communities to display properstress response. These results constitute the first evidence of the potential interaction between an herbicide and a fungicide on leaf-associated microbial communities functioning. (...)
Cook, Paul Edward. "Studies on fungal biomass and activity associated with the decomposition of plant litter in freshwater." Thesis, London Metropolitan University, 1987. http://repository.londonmet.ac.uk/3125/.
Full textNevlydov, I., V. Yevsieiev, S. Miliutina, and V. Bortnikova. "Accelerometers production technological process decomposition parameters model." Thesis, 2016 XII International Conference on Perspective Technologies and Methods in MEMS Design (MEMSTECH), 2016. http://openarchive.nure.ua/handle/document/3508.
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