Dissertations / Theses on the topic 'Soil biodiversity'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Soil biodiversity.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Smith, Joanne. "Agri-environment schemes and soil biodiversity: assessing the conservation, biodiversity and functional value of arable field margins for soil macrofauna." Thesis, University of Reading, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486322.
Full textBird, Stephanie. "The impact of native and exotic plants on soil biodiversity and ecosystem function." Thesis, University of Roehampton, 2016. https://pure.roehampton.ac.uk/portal/en/studentthesis/the-impact-of-native-and-exotic-plants-on-soil-biodiversity-and-ecosystem-function(c9707653-095b-4570-83d9-a444585f5b71).html.
Full textGodow, Bratt Tora, Mathilda Stigenberg, Andreas Elenborg, Sarah Ågren, and Andreas Medhage. "To monitor the microbial biodiversity in soil within Uppsala." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-444210.
Full textOliveira, Vanessa Bezerra de Menezes. "Soil function and biodiversity: regional variations and climate changes." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11352.
Full textEmbora o objetivo principal da proteção internacional dos solos seja proteger tanto as funções quanto a estrutura do solo, a atual abordagem trata principalmente da proteção ao nível estrutural. Há uma carência de estudos que contemplem a ligação das funções do solo com os níveis da comunidade. Além disso, é ainda desconhecido se as variáveis ambientais (ex: tipos de solo, condições climáticas) atuam nas funções do solo da mesma maneira que influenciam sua estrutura biológica. Ademais, as alterações climáticas poderão ter sozinhas ou combinadas com os poluentes, um grande efeito nos ecossistemas terrestres. O presente trabalho propõe estudar as funções e a estrutura biológica do solo quando impactados devido a estresse tóxico (poluição por Cu) e/ou alterações a fatores como a temperatura e abundância de organismos, de maneira a simular possíveis variações regionais ou climáticas. Para alcançar os objetivos principais 3 experiências utilizando diferentes densidades de E. crypticus e 2 gerações foram feitas (Capítulos II e III). Duas experiências com mesocosmos (SMS) decorreram durante 3 meses sob uma gama de diversas temperaturas (10 – 29°C), que representam temperaturas médias para Portugal e Dinamarca (Capítulos IV e V). Duas experiências de campo também foram realizadas com intuito de validar os SMSs (Capítulo VI). Resultados demonstraram que os efeitos do Cu na reprodução dos enquitraídeos dependem da densidade inicial de organismos, especialmente na 2ª geração. Entretanto, nos SMSs expostos a Cu, a densidade inicial é menos importante nos resultados finais. O aumento da temperatura alterou majoritariamente a fase inicial de crescimento populacional. Em períodos mais longos, a abundância estabilizou tornando-se menos influenciada pelas temperaturas. Períodos longos de exposição reforçaram os efeitos da temperatura, como por ex: diversas espécies foram similarmente afetadas a 29 ou 26°C quando expostas durante 28 ou 61 dias respectivamente. De forma geral, o Cu reduziu a abundância da maioria das espécies ao longo do tempo, com poucas exceções. Os resultados da decomposição da matéria orgânica (MO) e atividade alimentar associaram-se com a abundância de organismos em baixas temperaturas (10-23°C). Entretanto, com o aumento das temperaturas (19-29°C), este comportamento não foi claro e a abundância de espécies e atividade alimentar diminuíram enquanto a decomposição da MO aumentou. Além disso, os resultados observados nos SMSs foram confirmados no campo. Mais especificamente, alterações ocorreram na fase de crescimento (correspondente à Primavera) e a exposição ao Cu diminuiu os efeitos da temperatura. Metodologias mais complexas (ex: mais gerações e experiências com múltiplas espécies) apresentam muitos benefícios, mas também proporcionam respostas mais complexas, as quais exigem um maior “peso” de evidências para serem comprovadas.
Although the main aim for international soil protection is to protect both the soil structure and the soil function, the current soil protection approach mainly deals with protecting the soil structure level. There is a lack of studies that link the community level with soil function. Additionally, it is unknown if the environmental variables (e.g. soil type, climate conditions) are acting on function in the same way they influence the biological soil structure. On top of this, climate change will alone and in combination with pollution have a strong effect on the terrestrial ecosystem. In the present work the soil biological structure and function were studied when impacted due to a toxic stress (Cu pollution) and due to changes in factors such as organisms’ abundance, and temperature, simulating ecological aspects, regional and climate changes. To achieve the main goals 3 experiments using different densities of E. crypticus and two generations were performed and culminated in two papers (Chapters II & III). Two multispecies experiments (SMS) were conducted until 3 months and under various temperatures (10-29˚C), representing the span of average temperatures for Denmark and Portugal (Chapters IV & V). Two Field experiments were also performed in order to validate the results of the SMSs (Chapter VI). Results showed that the effect of Cu on reproduction does depend on the density, especially so in the succeeding generation. Nevertheless, in the SMS test with Cu, the initial density is less important for the outcome. Increased temperature in the SMSs caused major changes in the abundance, mainly in the initial phase of population growth. At longer exposures the population abundance stabilized and became less influenced by temperatures. The longer exposure enforced the temperature effects, e.g. for several species effects at 29ºC-28 days were similar to 26ºC-61 days. Copper caused a general depression in abundance over time for most species with a few exceptions. The OM decomposition and feeding activity responses at low temperature (10-23°C) were associated with the increase in species abundance whereas this was less clear at high temperatures (19-29°C), here with a decrease in feeding activity and species abundance but increase in OM decomposition. Additionally, responses observed in the SMSs were confirmed in the field. In specific, changes occurred in the growth phase (corresponding to the late spring exposure) and Cu depressed the temperature responses. More complex approaches (i.e. more generations and multispecies approach) has many benefits, but provides also more complex answers that may require more weight of evidence.
Visagie, Cobus M. "Biodiversity in the genus Penicillium from coastal fynbos soil." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/1856.
Full textDickens, Helen Elizabeth. "Functional attributes of biodiversity in decomposer communities." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326955.
Full textLimer, Laura Michelle Clare. "Biodiversity and ecosystem function : modelling soil biota and carbon cycling." Thesis, University of York, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442353.
Full textPino, Vanessa. "Soil Microbial Diversity Across Different Agroecological Zones in New South Wales." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16705.
Full textMarí, Marí Teresa. "Changes in soil biodiversity and activity along management and climatic gradients." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/457976.
Full textLos llamados "rangelands" son áreas sin cultivar, ampliamente pastoreadas por animales domésticos y salvajes, actualmente amenazados por los cambios climático y de uso del suelo. Los microorganismos del suelo tienen un papel clave tanto en la descomposición como en diversos procesos del ecosistema, por lo que composición y función de la comunidad microbiana han sido utilizados durante mucho tiempo como índices de fertilidad del suelo. Los rangelands europeos y africanos comparten un origen antropogénico común, pero el clima y la gestión del suelo les afectan de una manera diferente. Es por ello que esta tesis pretende analizar la comunidad microbiana de ambos tipos de ecosistemas, a fin de observar los efectos de algunas de las amenazas comunes desde una perspectiva más global. Mientras que el sobrepastoreo demostró tener el efecto más perjudicial sobre la función microbiana en suelos kenianos, se encontró un efecto más fuerte del clima sobre los prados europeos. Los hongos y las bacterias covariaron a lo largo de gradientes altitudinales y climáticos, pero la comunidad bacteriana mostró una recuperación más rápida después de las perturbaciones biológicas y físico-químicas del suelo. Este conjunto de estudios añade nuevos conocimientos sobre la estructura y función de los rangelands africanos y europeos, e invita a explorar nuevas líneas de investigación que incluyan tanto bacterias como hongos en el estudio de la comunidad microbiana del suelo.
Rangelands are uncultivated areas extensively grazed by wild and domestic animals, currently threatened by land use and climatic changes. Soil microorganisms play a key role in decomposition and several ecosystem processes and the composition and function of the microbial community have been long used as indices of soil fertility. African and European rangelands share a common anthropogenic origin, but climate and management affect them in a different way. That is why this thesis aimed to analyze the microbial community of both in order to observe the effects of some common threats from a more global perspective. While overgrazing proved to have the most detrimental effect on the soil microbial function in Kenyan soils, a stronger effect of climate was found to affect European grasslands. Fungi and bacteria co-varied along altitudinal and climatic gradients, but the bacterial community showed a fast recovery after biological and soil physico-chemical disturbances. This group of studies adds new knowledge on the structure and function of the African and European rangelands, and invite to explore new lines of research including both fungal and bacterial consortia when studying the soil microbial community.
Valentine, Lori Lisa. "The biodiversity of ectomycorrhizal fungi associated with Quercus garryana /." View full-text version online through Southern Oregon Digital Archives, 2002. http://soda.sou.edu/awdata/040226b1.pdf.
Full textIncludes bibliographical references (leaves 37-43). Also available via Internet as PDF file through Southern Oregon Digital Archives: http://soda.sou.edu. Search Bioregion Collection.
Martinez, Vila, and Martin Alvaro. "Environmental management of soil biodiversity and ecosystems for productive and sustainable agriculture." Thesis, Sumy State University, 2008. http://essuir.sumdu.edu.ua/handle/123456789/11773.
Full textMarshall, Carolyn Bowers. "Effect of plant functional group removal on the soil microbial community diversity and composition." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2865.
Full textLindberg, Niklas. "Soil fauna and global change : responses to experimental drought, irrigation, fertilisation and soil warming /." Uppsala : Dept. of Ecology and Environmental Research, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s270.pdf.
Full textKlinka, Karel. "Forest floor dynamics across a chronosequence in the coastal western hemlock zone." Forest Sciences Department, University of British Columbia, 1997. http://hdl.handle.net/2429/653.
Full textMurphy, Meaghan Thibault. "Biotic and abiotic controls on soil respiration in a biodiversity plantation in the tropics." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97978.
Full textALALI, SUMER. "IMPACT OF AGRICULTURAL PRACTICES ON BIODIVERSITY OF SOIL INVERTEBRATES, ASSESSMENT THROUGH DNA METABARCODING APPROACH." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/612179.
Full textBerkley, Nicholas Alexander James. "Patterns and process : biodiversity and ecosystem function response to changes in the arable landscape." Thesis, University of Plymouth, 2018. http://hdl.handle.net/10026.1/12825.
Full textSorkau, Elisabeth [Verfasser], and Yvonne [Akademischer Betreuer] Oelmann. "Land use and biodiversity effects on P-transformation in soil / Elisabeth Sorkau ; Betreuer: Yvonne Oelmann." Tübingen : Universitätsbibliothek Tübingen, 2019. http://d-nb.info/1184271542/34.
Full textGivaudan, Nicolas. "Adaptation strategies of soil biodiversity (earthworms) to pesticides : mechanisms in play and ecosystemic cost assessment." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S083/document.
Full textThis work investigated if long-term residual contamination of agricultural soils leads to adaptation of earthworm populations to pesticides. It also aimed at identifying the costs of adaptation from the individual to the population level, and the consequences for the ecosystem. Residual contamination by pesticides was assessed and compared in three fields under conventional management (classified after evaluation of pesticide applications as ''high-'', ''medium-'', and ''low-''pesticide input), one field under organic agriculture requirements and one organic permanent pasture, all in this type of management for more than 20 years. Using a water extraction method, as indicative of the amount of bioavailable pesticides 6, 8 and 4 residues of pesticides were recovered in the ''high-'', ''medium-'', and ''low-input'' fields, respectively, and almost no pesticides were detected in the soil of the organic field except for low levels of residual (possibly 20 years old) atrazine. The endogeic species Aporrectodea caliginosa and Allolobophora chlorotica were found in common to the five fields, -except A. chlorotica which was absent from the organic field-, and were used as biological models. Adaptation strategies were investigated by comparing the populations of these earthworms between the different fields according to several endpoints in field and laboratory assessments. The endpoints measured ranged from the molecular (biotransformation and anti-oxidant enzymes), biochemical (main energy resources), and metabolic (respiration rate, metabolomics) levels, to individual (weight, length) and population-related parameters (cocoon and juvenile life traits), and to the possible consequences for the ecosystem in terms of bioturbation (earthworm burrowing behaviour) and pesticide disappearance as an crucial ecosystem service. Enhanced detoxification and anti-oxidant potential was demonstrated along the gradient of contamination in the fields, and in particular comparing the response to an experimental pesticide exposure between the pre-exposed, thus possibly adapted earthworms from the ''high-input'' field-, and the naïve population from the organic field. Distinct energetic demands and metabolic rearrangements were observed between the populations, more pronounced in the pre-exposed earthworms. Physiological adaptation was demonstrated in pre-exposed animals, and this was associated with an increase in burrowing behaviour and pesticide disappearance in the soil. Population-level consequences were assessed in life traits of the two populations. The conventional farming including the use of pesticides decreased the weight of adult worms in the field and resulted in reallocation of energy resources, possibly from reproductive to metabolic function. This led to lower fecundity and hatching success and could partly explain lower earthworm densities in pesticide-impacted soils
I dette arbejde blev der forsket i om langsigtet residualforurening af landbrugsjord fører til pesticidadaptation hos regnorme. Forskningen sigtede også efter at identificere adaptations-omkostningerne fra individ- til populationsniveau, og konsekvenserne for økosystemet. Pesticiders residualforurening blev vurderet og sammenlignet i; tre konventionelt styrede marker (klassificeret efter evaluering af pesticid-anvendelser som ”højt-”, ”medium-”, og ”lav-input”), en mark styret ud fra økologiske betingelser, og et økologisk permanent græsningsareal, alle havde været styret på denne måde i mere end 20 år. Ved hjælp af en vand-ekstraktionsmetode blev 6,8 og 4 pesticidresiduums udvundet i henholdsvis ”høj-”, ”medium-”, og ”lav-input” markerne, og næsten ingen pesticider blev detekteret i jorden fra den økologiske mark bortset fra lave niveauer af resterende (højst sandsynligt 20 år gammelt) atrazin. Regnorms-populationerne Aporrectodea caliginosa og Allolobophora chlorotica blev fundet i alle fem marker, bortset fra A. chlorotica som ikke var til stede i den økologiske mark. Adaptationsstrategier blev undersøgt ved at sammenligne populationerne af disse regnorme de forskellige marker imellem ifølge flere parametre i felt- og laboratoriebedømmelserne. De målte parametre rangerede fra molekylære- (biotransformation og antioxiderende enzymer), biokemiske- (primære energiressourcer), og metaboliske- (respirationsrate, metabolomics) niveauer, til individuelle- (vægt, længde) og populations-relaterede parametre (puppe og juvenile livskarakterer), og til de mulige konsekvenser for økosystemet med hensyn til bioturbation (regnormes grave-adfærd) og nedgang i koncentrationen af ekstraherbare pesticider. Forbedret afgiftnings- og antioxiderende potentiale blev demonstreret langs gradienten af pesticid forurening i felten. Forbedret afgiftning i den pre-eksponerede population var særdeles tydeliggjort ved eksponeringen til pesticider i laboratoriet sammenliget med den økologiske population. Der blev observeret distinkte energibehov og metabolisk omgruppering populationerne imellem, dette var mere udtalt hos de pre-eksponerede regnorme. Der blev detekteret fysiologiske adaptationer hos de pre-eksponerede dyr, og dette hang sammen med en kompensatorisk øgning i grave-adfærd og nedgang i koncentrationen af ekstraherbare pesticider i jorden. Konsekvenser, på populationsniveau, blev bedømt ud fra de to populationers livskarakterer. Brug af pesticider resulterede i vægtnedgang hos de voksne orme i felten og omfordeling af energiressourcer, formodentlig fra reproduktiv til metabolisk funktion. Dette førte til lavere frugtbarhed og udklæknings-succes og kunne til dels forklare de lavere regnorme-densiteter i den pesticid-påvirkede jord
Gadekar, Kumarsukhadeo Prakash. "Analysis of biodiversity and soil C storage in the south Konkan coast of Maharashtra (India)." Thesis, Bangor University, 2012. https://research.bangor.ac.uk/portal/en/theses/analysis-of-biodiversity-and-soil-c-storage-in-the-south-konkan-coast-of-maharashtra-india(a881dcd3-1b20-4199-b211-b3fd04e6712b).html.
Full textSmuts, Ian Heinrich. "Influence of Acid Mine Drainage on the soils of Nababeep, Namaqualand with reference to soil chemistry, minerals and metal mobility." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96897.
Full textENGLISH ABSTRACT: The Okiep copper district in the north-western corner of South Africa is a region that has been mined for over 150 years. Most mining operations have ceased, but years of mining has left the area scattered with abandoned mining sites. Acids (as used in ore processing) together with acid mine drainage generated from tailings exposure, collectively referred to as AMD hereafter, are a contamination risk to water resources and the biodiversity of this arid area. This study focused on an abandoned copper processing pond located close to the town of Nababeep. The leaching pond is unlined and has been excavated in the shallow colluvial soils. The natural soils of the area are shallow (60 cm) (WRB – Arenosol; SA – Oakleaf). Formations of corroded granite-gneiss boulders are an indication of the corrosiveness of the AMD collecting in the pond. The AMD was collected from the pond in the dry season at its most concentrated form and the AMD had exceptionally high concentrations of Al (26.9 g/l), Fe (42.9 g/l), Mg (20.5 g/l), Cu (3.8 g/l) and Mn (3.4 g/l). Melanterite (FeSO4·7H2O), a soluble ferrous compound, was found to play an important role in the immediate release of Fe and sulfates. The pristine soils have a sandy texture (2–5.2 %clay). The minerals detected in the clay phase include illite, kaolinite, montmorillonite and quarts. Pristine soils show some degree of contamination with low pH (4.38–4.77) and high Cu and sulfate contents. Soils located in the processing pond, which have been exposed to AMD for an extended period of time, showed poorly crystalline phases to be present (indicated by a broadening of the XRD peaks for clay minerals). Saturation indices (SI) were determined for saturated paste extracts of the pond soils and the obtained SI values support the notion of dissolution of silicate clays, as the obtained SI values ranged between –1.3 and –11.77 for illite and –4.76 to 0.58 for kaolinite. Jarosite, a new phase, formed in the contaminated soil and is a sink for K. Long term weathering experiments of pristine soils exposed to AMD indicated that clay minerals are significantly weathered and altered, which was identified by observing the broadening of the clay XRD peaks. Fourier transform infrared (FTIR) spectra were generated by scanning clay samples of the weathered soil. Amorphous phases were confirmed by structured water bands with wavenumber values of 3700 and 3300 cm−1 for acid treated soil. Micrographs showed a more amorphous and corroded morphology in the acid treated soil. Metal retention experiments were conducted by exposing the pristine soil to AMD repeatedly. Iron was the predominant metal attenuated in the soil. Metals such as Al, Mn, Na, K, Ca and Co were released by the soil into solution. Removal of Si is associated with the dissolution of clay minerals. The pristine soil shows limited capacity to neutralize acidity and low capacity to retain metals when leached with AMD. Metals were predominantly extracted in the water soluble phase of the long term weathering treatments. Aluminium was the most mobile fraction, being extracted predominantly from the water soluble fraction (2035 mg/kg). Exchangeable and acid soluble fractions did not retain significant quantities of metals. In the soil from the processing pond, the reducible fraction had a high concentration of reducible Fe (21175 mg/kg) and Si (3070 mg/kg). The reducible fraction also had the highest concentration of Cr (15.85 mg/kg), Cu (41.53 mg/kg), Pb (8.0 mg/kg) and Zn (10.65 mg/kg) compared to the other fractions of this soil. For the control experiment, the concentration of Cu (77.3 mg/kg), Pb (10.8 mg/kg) and Zn (24.1 mg/kg) were higher than contaminated soil yet lower for Cr (6.05 mg/kg). From these experiments, it can be concluded that the pristine soils studied have a limited ability to retain heavy metals in the non-bioavailable fraction, and, due to the nature of AMD, they are not effective in retaining metals sufficiently. The findings of this study suggest that the capacity of these pristine soils to buffer pH and retain metals is greatly limited. This could be as a result of (1) the low clay content, (2) the low concentration of secondary carbonates and (3) the low pH of the soil. The leaching of AMD from the pond is thus not regulated by the soils and poses a risk for nearby water resources.
AFRIKAANSE OPSOMMING: Die Okiep Koper Distrik, geleë in die noord-westelike hoek van Suid-Afrika, is ‘n streek waar mynbou al vir meer as 150 jaar plaasvind. Die meeste mynbou aktiwiteite is gestaak, maar jare van mynbou het die streek nagelaat met verskeie verlate mynbouterreine. Sure, wat in die prosessering van erts gebruik word, en suurmynwater wat gegenereer word uit die mynuitskot (gesamentlik verwys na as suurmynwater) is ‘n besoedelingsrisiko vir waterbronne en biodiversiteit in hierdie dorre area. Die studie fokus op ‘n verlate koper prosesserings aanleg naby die dorpie Nababeep. Die logingsdam is nie geseël nie en is uitgegrawe in vlak, kolluviale grond. Die natuurlike gronde van hierdie area is vlak (60 cm) (WRB – Arenosol; SA – Oakleaf). Formasies van weggevrete graniet-gneis rotse in die opgaardam is ‘n aanduiding van die bytende potensiaal van hierdie suurmynwater. Suurmynwater was versamel in die dam gedurendie die droë seisoen in die mees gekonsentreerde vorm. Die suurmynwater het besonderse hoë konsentrasies van Al (26.9 g/l), Fe (42.9 g/l), Mg (20.5 g/l), Cu (3.8 g/l) en Mn (3.4 g/l). Melanteriet (FeSO4·7H2O) is ‘n ysterhoudende verbinding en, alhoewel dit oplosbaar is, speel dit ‘n belangrike rol in die onmiddelike vrylating van Fe en sulfate. Die onversteurde grond het ‘n sand tekstuur (2–5.2 % klei). Die minerale wat in die klei fraksie ge-identifiseer is sluit illiet, kaoliniet, montmorilloniet en kwarts in. Die ongerepte gronde dui egter op ‘n mate van besoedeling deurdat dit ‘n lae pH (4.38–4.77) enhoë Cu en sulfaat inhoud het. Die grond wat geleë is naby die prosesseringsaanleg en ook blootgestel is aan suurmynwater vir ‘n verlengde tyd, dui daarop dat swak kristallyne fases teenwoordig is in die grond. Dit word bevestig deur ‘n verbreding van die XRD pieke van kleiminerale. Versadiging indekse (VI), wat bepaal is in versadigde grondekstraksies van die damgrond, ondersteun die oplossing van die silikaatkleie en word gereflekteer deur VI waardes wissel tussen –1.3 en –11.77 vir illiet en –4.76 tot 0.58 vir kaoliniet. Jarosiet is ‘n nuwe fase wat gevorm het in die besoedelde grond en is ‘n sink vir K. Langtermyn verweringseksperimente wat gedoen is deur die onversteurde grond bloot te stel aan suurmynwater wys beduidende verwering en verandering van klei-minerale deur verbreding van die XRD pieke. Fourier transform infrarooi (FTIR) spektra is op kleimonsters van die verweerde grond gegenereer. Amorfe fases is bevestig deur gestruktureerde waterbindings met frekwensies tussen 3700 en 3300 cm−1 vir suurbehandelde grond. Metaal-vasleggings eksperimente is uitgevoer deur herhaaldelik die onversteurde grond aan die suurmynwater bloot te stel. Yster is die metaal wat hoofsaaklik in die grond vasgehou is. Metale soos Al, Mn, Na, K, Ca en Co was vrygestel in oplossing deur die grond. Die vrylating van Si deur die grond word geassosiëer met die oplossing van kleiminerale. Die onversteurde grond toon beperkte vermoë om suur te neutraliseer en metale te bind in die grond wanneer dit met suurmynwater geloog word. Metale was hoofsaaklik ge-ekstraëer in die wateroplosbare fase vir die langtermyn verweringsbehandelings. Aluminium was die mees mobiele fraksie wat ontrek is van die water oplosbare fraksie (2035 mg/kg). Uituilbare en suuroplosbare fraksies het nie ‘n groot hoeveelheid metale vasgehou nie. Gronde wat versamel is naby die prosesseringsdam het die hoë konsentrasies vanFe (21175 mg/kg) en Si (3070 mg/kg) in die gereduseerde fraksie gehad. Die reduserende fraksie het ook die hoogste konsentrasie van Cr (15.85 mg/kg), Cu (41.53 mg/kg), Pb (8.0 mg/kg) en Zn (10.65 mg/kg) gehad in vergelyking met ander fraksies in die grond. Vir die beheer eksperiment was die konsentrasie van Cu (77.3 mg/kg), Pb (10.8 mg/kg) en Zn (24.1 mg/kg) hoër as in die besoedelde grond en laer vir Cr (6.05 mg/kg). Dus kan daar van hierdie eksperimente afgelei word dat die onversteurde grond beperkte kapasiteit het om swaar metale in grond vas te hou in die nie-biobeskikbare fraksie. As gevolg van die aard van die suurmynwater, is die grond nie voldoende om die metale effektief in grond te behou nie. Die bevindinge van hierdie studie dui daarop dat die kapasiteit van die ongerepte grond om pH te buffer en metale in grond te behou baie beperk is. Dit kan toegeskryf word aan die lae kleiinhoud, lae konsentrasie van sekondêre karbonate en die lae pH van die grond. Die loging van suurmynwater van die logingsdam is dus nie gereguleer deur die gronde nie en stel die naasliggende waterbronne in gevaar.
Sommeria-Klein, Guilhem. "From models to data : understanding biodiversity patterns from environmental DNA data." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30390/document.
Full textIntegrative patterns of biodiversity, such as the distribution of taxa abundances and the spatial turnover of taxonomic composition, have been under scrutiny from ecologists for a long time, as they offer insight into the general rules governing the assembly of organisms into ecological communities. Thank to recent progress in high-throughput DNA sequencing, these patterns can now be measured in a fast and standardized fashion through the sequencing of DNA sampled from the environment (e.g. soil or water), instead of relying on tedious fieldwork and rare naturalist expertise. They can also be measured for the whole tree of life, including the vast and previously unexplored diversity of microorganisms. Taking full advantage of this new type of data is challenging however: DNA-based surveys are indirect, and suffer as such from many potential biases; they also produce large and complex datasets compared to classical censuses. The first goal of this thesis is to investigate how statistical tools and models classically used in ecology or coming from other fields can be adapted to DNA-based data so as to better understand the assembly of ecological communities. The second goal is to apply these approaches to soil DNA data from the Amazonian forest, the Earth's most diverse land ecosystem. Two broad types of mechanisms are classically invoked to explain the assembly of ecological communities: 'neutral' processes, i.e. the random birth, death and dispersal of organisms, and 'niche' processes, i.e. the interaction of the organisms with their environment and with each other according to their phenotype. Disentangling the relative importance of these two types of mechanisms in shaping taxonomic composition is a key ecological question, with many implications from estimating global diversity to conservation issues. In the first chapter, this question is addressed across the tree of life by applying the classical analytic tools of community ecology to soil DNA samples collected from various forest plots in French Guiana. The second chapter focuses on the neutral aspect of community assembly.[...]
Bateman, Sarah Marie. "Exploring soil erosion and biodiversity in multifunctional landscapes : A case study of the South Downs, UK." Thesis, University of Nottingham, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523025.
Full textLindberg, Niklas. "Impact of climate change on soil fauna diversity : effects of experimental drought, irrigation, soil warming and nutrient addition /." Uppsala : Swedish Univ. of Agricultural Sciences, 2001. http://epsilon.slu.se/avh/2001/99-3576673-X.pdf.
Full textRakiep, Adeebah. "Analysis of actinobacterial biodiversity in reservoir sediment and cave soil and screening of isolates for antimycobacterial activity." Master's thesis, Faculty of Science, 2020. http://hdl.handle.net/11427/32941.
Full textNakamura, Akihiro. "Development of Soil and Litter Arthropod Assemblages in Rainforest Restoration." Thesis, Griffith University, 2008. http://hdl.handle.net/10072/367553.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Environment
Faculty of Science, Environment, Engineering and Technology
Full Text
Liang, Weiguang, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Impact of horticultural mineral oil and synthetic pesticides on arboreal and soil fauna biodiversity within citrus orchard ecosystems." THESIS_CSTE_SFH_Liang_W.xml, 2002. http://handle.uws.edu.au:8081/1959.7/121.
Full textDoctor of Philosophy (PhD)
Liang, Weiguang. "Impact of horticultural mineral oil and synthetic pesticides on arboreal and soil fauna biodiversity within citrus orchard ecosystems." Thesis, View thesis, 2002. http://handle.uws.edu.au:8081/1959.7/121.
Full textLiang, Weiguang. "Impact of horticultural mineral oil and synthetic pesticides on arboreal and soil fauna biodiversity within citrus orchard ecosystems /." View thesis, 2002. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030819.153206/index.html.
Full text"A thesis submitted to the University of Western Sydney for the fulfillment of study for a degree of Doctor of Philosophy in Horticulture" "Principal supervisor: Robert Spooner-Hart, co-supervisor: Andrew Beattie, co-supervisor: Alfie Meats" Bibliography : leaves 231-265.
Lucas, Shawn T. "MANAGING SOIL MICROBIAL COMMUNITIES WITH ORGANIC AMENDMENTS TO PROMOTE SOIL AGGREGATE FORMATION AND PLANT HEALTH." UKnowledge, 2013. http://uknowledge.uky.edu/pss_etds/24.
Full textStruckhoff, Garrett Cletus Parkin Gene F. "Plant-assisted bioremediation of perchlorate and the effect of plants on redox conditions and biodiversity in low and high organic carbon soil." [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/441.
Full textVincent, Quentin. "Étude des paramètres abiotiques, biotiques et fonctionnels, et de leurs interactions dans des sols délaissés." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0015/document.
Full textDue to industrial activities intensification, large surfaces of degraded soils, with low fertility and sometimes contamination, are derelict. In the context of land depletion and economic pressure, the rehabilitation of these derelict anthropogenic soils could be a key issue. However, these derelict soils needs to be better characterized before to consider their potential use. Soil quality studies rarely take into account the biodiversity and the biological functioning. Thus, the aim of this PhD work was to characterize derelict soils by considering their abiotic, biotic and functional parameters. To this end, six derelict strongly anthropogenic soils from north-eastern France, resulting from different industrial activities, were studied in situ and in laboratory. Several biotic components (bacteria, fungi, mesofauna, macrofauna and flora) were studied to have an almost complete approach of the soil biodiversity. Taxonomical and functional (trait-based approach) study of biodiversity was performed for fungi, meso- and macrofauna. Moreover, the in situ evolution over time of abiotic and biotic parameters was taken into account in one of the six studied derelict soils. Lastly, biotic interactions between a species of Collembola, of arbuscular mycorrhizal fungi and of herbaceous plant were studied in two derelict soils, in a growth chamber. We showed that derelict soils were characterized by a significant biodiversity, comparable case to case with other kinds of soils like forest, grassland or crop. Nevertheless, differences in terms of density, richness and taxonomical and functional structure community were observed between soils and depend on considered biotic group. These differences were notably linked with contrasting physico-chemical parameters between soils. Thus, a compost-amended constructed soil was the less disturbed among the six studied soils, in contrast with a heavy metal-contaminated constructed soil. We showed that abiotic parameters, notably biotic parameters, evolved quickly (within one year) in the metal-contaminated constructed soil. In the two derelict soils where interactions between Collembola and mycorrhizal fungi were studied, biotic interactions were affected by several parameters like soil volume, time of interaction, indigenous microflora presence etc. Finally, we have shown that these derelict soils support ecosystems services such as biodiversity reserve and could be functional, allowing potential re-use
Franco, André Luiz Custódio. "Soil engineering by macroinvertebrates: controls on soil organic matter storage across land use change." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-26052015-165800/.
Full textGlobalmente mudanças no uso da terra (MUT) com o aumento da intensidade de uso do solo têm levado a uma diminuição da matéria orgânica do solo (MOS). A redução do estoque de C do solo após MUT tem sido acompanhada por uma desestabilização da estrutura do solo e aumento da susceptibilidade a erosão. A desestabilização da estrutura também é concomitante com a perda da biodiversidade do solo e, em particular, da comunidade de macroinvertebrados do solo. O foco deste trabalho é o efeito de MUT com aumento na intensidade de uso do solo sobre a macrofauna do solo, agregação e alocação da MOS. Nossa hipótese é que MUT reduz a diversidade da macrofauna do solo e, conseqüentemente, diminui os processos de engenharia de solo, resultando na desestabilização da estrutura do solo e prejudicando a capacidade do solo para proteger fisicamente a MOS da decomposição dentro de agregados estáveis, finalmente levando a redução dos estoques de C após MUT. Foi realizada uma pesquisa em 3 cronosseqüências de uso da terra que compreendem vegetação nativa (NV), pastagem (PA), e cana-de-açúcar (CA) na região Centro-Sul do Brasil. Esta MUT fornece um gradiente de intensidade de uso do solo e é projetada para adicionar 6,4 Mha de novas áreas de CA no Brasil até 2021. Em cada ponto de amostragem de solo blocos de 25 x 25 cm e 5 x 5 cm a 10 cm de profundidade foram coletados simultaneamente das camadas 0-10 cm, 10-20 cm e 20-30 cm de solo, para isolamento da macrofauna e fracionamento de agregados, respectivamente. Foi observada uma redução média de 89% na densidade da comunidade da macrofauna quando CA substitui PA, e uma perda de 39% da diversidade de grupos. Nossos resultados mostraram que, em um intervalo de texturas do solo (16-66% de argila), tal perda de biodiversidade foi fortemente correlacionada com a desestabilização da estrutura do solo após MUT. Estas observações indicam consistentemente que a abundância de animais detritívoros, especialmente minhocas e cupins, pode ser um preditor significativo de transformações da estrutura do solo em MUT. Além disso, a forte redução na abundância de minhocas foi fortemente e positivamente correlacionada com a diminuição do C alocado intra macroagregados. Como resultado, após mais de 20 anos de cultura de CA houve perdas de 40 e 35% dos estoques de C e N, respectivamente, resultando em uma taxa de emissão de C de 1,3 Mg ha-1 ano-1. Esta perda de C ocorreu principalmente no C associado aos macroagregados, como um resultado da reciclagem mais rápida dos macroagregados sob CA. Em resumo, os resultados aqui apresentados fornecem uma explicação mecanicista a respeito de porque há esgotamento do C do solo quando aumenta-se a intensidade de uso do solo em ambientes tropicais: a enorme redução na abundância de invertebrados \"engenheiros do solo\" após MUT prejudica a capacidade do solo para proteger fisicamente a MOS da decomposição dentro de agregados estáveis, e, portanto, é um mecanismo primário controlando a redução dos estoques de C no solo relacionada a MUT.
Damaso, Natalie. "Biogeographical Patterns of Soil Microbial Communities: Ecological, Structural, and Functional Diversity and their Application to Soil Provenance." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/3006.
Full textMajeed, Muhammad Zeeshan. "Emissions of nitrous oxide by tropical soil macrofauna : impact of feeding guilds and licrobial communities involved." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20073/document.
Full textSoils account for about 63% of N2O emissions. Tropical soils are estimated to emit 23% of global N2O emission budget which is much higher than temperate soil N2O emissions. These soils also harbor a huge biodiversity of invertebrates dominated by four types of macrofauna i.e. termites, earthworms, ants and scarabaeid grubs. These macrofaunal groups are considered as soil engineers because they regulate the availability of chemical resources, like mineral nitrogen, for the microorganisms via their specific digestion capabilities and/or by creating and modifying soil habitats. This study is based on the following hypothesis (i) the gut environment or biogenic structures of these soil engineers are considered as hotspots of N2O emission (ii) the N2O emission rates will vary according to their feeding behavior as these macrofauna thrive on diverse substrates with different C:N ratio (iii) the rate of N2O emission in each soil fauna will also depend on the gut density of the bacterial communities involved in the N2O emission (nitrifiers and denitrifiers) and on the mineral nitrogen content within the gut. To assess these different hypotheses in-vitro short-term N2O emission rates were assessed for either live macrofauna (30 species collected from Africa, South America and Europe) or their biogenic materials or both under aerobic incubations. Genes abundance of nitrifiers (AOA and AOB) and denitrifiers (nirK, nirS, nosZ) were quantified by real time quantitative PCR. Soil-feeders and fungus-growing termites and scarabaeid grubs emitted in-vivo N2O while ants did not. Surprisingly, wood- and grass-feeding termites revealed an uptake of N2O. Biogenic structures of earthworms and ants emitted substantial amount of N2O while those of termites did not. The emission difference between macrofauna or their biogenic materials and their control materials was significant for most of the macrofaunal groups studied confirming our first hypothesis. We also confirmed that the feeding behavior (total N content and C:N ratio of food material) is the main factor explaining the observed N2O emission pattern of each macrofaunal group investigated whereas genes abundances, particularly of denitrifiers and gut N mineral content did not appear to be relevant proxies of the N2O emissions rates. A back-on-the-envelope data upscaling suggests that soil macrofauna could contribute from 0.1–11.7% and 0.1–8.8% of the total soil N2O emissions, respectively, for the tropical rainforest and dry savanna ecosystems. This work should contribute to a better estimation of the soil biotic compartment in the different models of greenhouse gas emissions from tropical soils
Malmström, Anna. "Effects of wildfire and prescribed burning on soil fauna in boreal coniferous forests /." Uppsala : Department of Ecology and Environmental Research, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/2006111.pdf.
Full textLemenih, Mulugeta. "Effects of land use changes on soil quality and native flora degradation and restoration in the highlands of Ethiopia : implications for sustainable land management /." Uppsala : Dept. of Forest Soils, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/s306.pdf.
Full textJones, Isabel L. "Legacies of tropical forest fragmentation and regeneration for biodiversity and carbon storage." Thesis, University of Stirling, 2017. http://hdl.handle.net/1893/26238.
Full textKumpula, Kimmo. "Systematic comparison of the relative accuracy of vegetation surveys and soil DNA metabarcoding : Assessing plant biodiversity at different spatial scales." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-172130.
Full textPeretti, Emiliano. "Exploring the diversity of a neglected group of soil invertebrates (Chilopoda) across the South-Eastern Prealps." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3423294.
Full textLaw, Audrey. "EVALUATING THE EFFECTS OF ORGANIC AND CONVENTIONAL INPUTS ON SOIL CHEMICAL AND BIOLOGICAL PROPERTIES IN A FOUR-YEAR VEGETABLE ROTATION AND THE INVESTIGATION OF SOIL MICROBIAL PROPERTIES ON PLANT GENE EXPRESSION." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/704.
Full textZewdie, Mulugeta. "Temporal changes of biomass production, soil properties and ground flora in Eucalyptus globulus plantations in the Central highlands of Ethiopia /." Uppsala : Dept. of Forest Soils, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200818.pdf.
Full textGonzález-Rivas, Benigno. "Tree species diversity and regeneration of tropical dry forests in Nicaragua /." Umeå : Dept. of Silviculture, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200558.pdf.
Full textAdolphson, Honi M. "Acari (Mite) Abundance And Diversity In Soil And Litter Layers Of Eucalyptus Globulus Labill (Tasmanian bluegum) Plantations In Southwest Western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2000. https://ro.ecu.edu.au/theses/1542.
Full textViketoft, Maria. "Soil nematode communities in grasslands : effects of plant species identity and diversity /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200748.pdf.
Full textFaugier, Aurélie. "Diversité bactérienne des sols : accès aux populations à effectifs minoritaires "the rare biosphere"." Phd thesis, Ecole Centrale de Lyon, 2010. http://tel.archives-ouvertes.fr/tel-00502105.
Full textMEI, GIACOMO. "Vegetation, Soil and Pedofauna as Proxy to Understand Ecology of Ostrya Carpinifolia Forests in Europe." Doctoral thesis, Università Politecnica delle Marche, 2019. http://hdl.handle.net/11566/263606.
Full textHaving identified the Ostrya carpinifolia forests as one of the most widespread forest types in the Apennines-Balkan bio-geographical region and having highlighted the shortage of studies, and the lack of inclusion of these coenoses in the habitats described at European level, the main purpose of the Ph.D research project, summarized in this work, was to provide useful data to understand the ecological value, the dynamics, the potentiality and the threats of these coenoses. In order to provide an image as complete as possible, the project was articulated into three key points. (I) The analysis of the dynamics related to traditional coppice management, its modification and abandonment, useful to identify the optimum duration of the rotation and the ecological effects of the abandonment, carried out through the in-depth study of coenoses during different moments of the rotations examined and after a decades of abandonment in the Apennines areas. (II) The investigation of the effects of ecological isolation on these coenoses, useful in establishing the ecological value of the existing isolated coenoses, the current dynamics and the identification of a minimal area of intervention, carried out by in-depth study of the residual Ostrya carpinifolia woods present in the territory of the Marche region. (III) A preliminary census of these forest formations along the Italian and Balkan territories, carried out by collecting floristic-vegetational, pedological, structural and management data of these coenoses at the whole geographic distribution range. The main result of this large data collection campaign is the creation of datasets related to the ecological and management characteristics, regarding the entire distribution area and all the different management phases. The interpolation and reworking of these data allow to increase the understanding of these forest formations, making it possible to interpret dynamics and evaluate the real ecological value characterizing the Ostrya carpinifolia forests. These aspects are still difficult to deal with, given the data presently available in literature, but fundamental to build dynamic forecast models. Models necessary for the drafting of real useful management and landscaping plans. The studies carried out and here reported show how these formations, commonly labelled as not very interesting under the ecological point of view, are instead characterized by a particularly rich flora, a very lively dynamism and highlight a strong resilience. Therefore, these coenoses should not be interpreted as transitory or recovery phases of more "mature" coenoses, but real stable semi-natural forest formations very rich in terms of biodiversity, now threatened by widespread abandonment, exactly like the secondary prairies habitats.
Struckhoff, Garrett Cletus. "Plant-assisted bioremediation of perchlorate and the effect of plants on redox conditions and biodiversity in low and high organic carbon soil." Diss., University of Iowa, 2009. https://ir.uiowa.edu/etd/441.
Full textLOZANO, FONDON Carlos. "MICROARTHROPOD ECOLOGY AND ECOSYSTEM TYPES: LINKING ADAPTATION TO SOIL AND DIVERSITY OF COMMUNITIES TO ENVIRONMENTAL CONDITIONS IN DIFFERENT GEOGRAPHICAL LOCATIONS." Doctoral thesis, Università degli studi di Ferrara, 2021. http://hdl.handle.net/11392/2488070.
Full textLa comunità del suolo è altamente variabile in diversità e abbondanza a seconda del tipo di ecosistema e clima. È coinvolta nella provvisione di funzioni ecosistemiche che costituiscono la base dei servizi forniti dal suolo. Le pratiche di gestione del suolo portano alla degradazione di esso compromettendo la comunità biotica e la stabilità dell’ecosistema. Gli artropodi del suolo sono coinvolti in processi ecosistemici come la decomposizione della materia organica, nonostante il suo ruolo è stato trascurato fino a tempi recenti. La domanda di ricerca è: quali sono gli effetti dei cambiamenti stagionali nella diversità degli artropodi sulle funzioni ecosistemiche e la stabilità delle reti trofiche del suolo? La sezione I si focalizza su come la variabilità in diversità degli artropodi provoca cambiamenti nei flussi di carbonio in due foreste degli Appennini Italiani (nord e sud). A questo scopo, sono state modellate delle reti trofiche quantitative bassate sulle biomasse dei diversi gruppi di organismi (batteri, funghi e microartropodi). Le differenze climatiche di entrambi posti (continentale nel nord, e mediterraneo nel sud) hanno indotto dei comportamenti antagonisti in base ai cambiamenti stagionali: a nord, la risposta della rete trofica è stata indirizzata sull’incremento della stabilità, mentre a sud si è verificato un incremento della resistenza della rete dovuta all’aumento dell’attività metabolica. Addizionalmente, i predatori contribuirono al miglioramento della stabilità in entrambe le foreste, mentre funghi e batteri costituirono i gruppi principali controllando il flusso di carbonio. Le sezioni II e III si focalizzano sugli effetti delle caratteristiche ambientali locali sugli artropodi del suolo in sistemi semiaridi. Il funzionamento ecologico di queste aree è fortemente relato alla distribuzione della vegetazione e al ciclo idrologico. La diversità e funzioni ecosistemiche del suolo dipendono dalle risorse che la vegetazione provvede. La pressione esercitata dal bestiame riduce la capacità dei suoli di fornire servizi. La domanda di ricerca è: qual è la distribuzione spaziotemporale degli artropodi a seconda delle caratteristiche di ciascun sito, pressione del bestiame e fattori limitanti? Due aree di studio con caratteristiche ambientali simili sono state studiate. La prima (sezione II) è stata individuata nel sudovest della Spagna. Un’analisi di fotointerpretazione in un bacino sperimentale è stata fatta per determinare la pressione del bestiame. In totale, sono stati individuati di 150 punti di campionamento suddivisi in primavera e autunno, e in base alla vicinanza agli alberi (sotto chioma e fuori chioma). Parametri biologici e chimico-fisici del suolo sono stati considerati come fattori incentivanti delle abbondanze, ricchezza e occorrenza di tratti morfologici sugli artropodi. I risultati mostrarono che maggiori abbondanze e adattamento sono correlate con aree fuori chioma. La classificazione delle categorie di pressione del bestiame rilevata dall’analisi delle immagini di satellite mostrò una bassa relazione con i descrittori della comunità. Lo studio degli artropodi sottoposti a siccità estrema e alla simulazione di un processo di umidificazione del terreno si presenta nella sezione III. L’area di studio è localizzata nell’area centrale del Cile. In totale, 33 campioni di suolo sono stati rilevati, e suddivisi in base alla pressione del bestiame fuori chioma e sotto chioma dell’albero. Per lo studio del processo di umidificazione, 40 L di acqua sono stati aggiunti a ciascun punto 3 giorni prima del campionamento. Per tracciare le variazioni di abbondanza e ricchezza della comunità si è sviluppata una trasposizione delle coordinate dei campioni a una dimensione basata sulla distanza dei campioni agli alberi. Valori più alti sono stati trovati lontani dagli alberi durante il processo di umidificazione.
Pauli, Natasha. "Environmental influences on the spatial and temporal distribution of soil macrofauna in a smallholder agriforestry system of western Honduras." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0142.
Full text