Thèses sur le sujet « Tree species effect »
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Lisi, Claudio S., Luiz C. R. Pessenda, Mario Tomazello et Kazimiers Rozanski. « ¹⁴C Bomb Effect in Tree Rings of Tropical and Subtropical Species of Brazil ». Tree-Ring Society, 2001. http://hdl.handle.net/10150/251653.
Texte intégralMorrissey, T. « The effect of tree species on fluxes of nitrous oxide from forest soils ». Thesis, University of York, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428519.
Texte intégralGindaba, Jiregna. « Water and nutrient relations of selected tree species of Ethiopia ». Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16050.
Texte intégralENGLISH ABSTRACT: This study was conducted to evaluate and compare the water and nutrient relations of three indigenous deciduous tree species, viz., Cordia africana Lam., Croton macrostachyus Del., Millettia ferruginea (Hochst.) Baker and two widely planted eucalypts, viz., Eucalyptus camaldulensis Dehnh and Eucalyptus globulus Labill from Ethiopia. The study was organized as glasshouse and field observations in Ethiopia. Owing to the lack of baseline studies on the water and nutrient relations of the deciduous tree species, the glasshouse experiments involved a wide range of water and nutrient applications. Seedlings were grown with the supply of various levels of water and nutrients during which gas exchange, water potential, relative water content, tissue nutrient content and biomass production were measured. The field observations were limited to the study of surface root distribution and leaf nutrient composition of mature trees and their effects on soil nutrient pool. The observations were made on isolated trees and mixed or pure stands of trees in Badessa area, Eastern Ethiopia. The field site was selected because of the availability of the study species and suitability of the trees for the study. In the glasshouse, increased water deficit significantly reduced predawn leaf water potential, relative water content, stomatal conductance, photosynthetic rate, whole plant water use efficiency, plant height, diameter, leaf area and biomass production. Both of the eucalypts did not grow faster than the deciduous species under well-watered conditions unlike under water stress conditions. C. macrostachyus and C. africana had higher transpiration rates and tissue nutrient accumulations than the other species. They also demonstrated higher biomass allocation to roots than all the other species to support the intensive water and nutrient uptake rate. Due to the ability to re-orient its leaves to avoid direct solar irradiance, M. ferruginea maintained higher tissue water potential and relative water content than all the other species under water stress regimes. The impact of imposed drought was quick and more damaging to the eucalypts compared to the deciduous tree species indicating that the eucalypts may not survive extreme drought conditions unlike the deciduous species that drop their leaves and may remain dormant for weeks. The current study gave new experimental proof that E. globulus was more vulnerable to drought than E. camaldulensis. Soil N stress resulted in an overall reduction of tissue N concentration, N:P ratio, photosynthetic rate, stomatal conductance and photosynthetic water use efficiency in all the species studied. Pants with high foliar nitrogen concentration had higher photosynthetic capacities indicating that N plays a key role in photosynthesis and growth of all the studied species. The current study showed that for all the tree species, more attention has to be given to soil N than to P as soil P had minor effects on the photosynthetic activities of plants of all species compared to N.The investigation on tissue nutrient composition confirmed that N:P ratio could be used to detect Plimitation in plants. However, N:P ratio could not distinguish between N-limitation and combined limitations of N and P. The study of isolated C. africana and C. macrostachyus trees on soils in Badessa, Eastern Ethiopia indicated improved soil N, P and K under tree canopies whereas no effects were observed on the other soil nutrients studied. Similar to glasshouse conditions, C. macrostachyus and C. africana produced extensive surface roots, interfering with crops grown in association. Due to their high nutrient cycling potential the net effect on soil was positive. Comparison of E. camaldulensis woodlot and a mixed stand composed of deciduous species indicated that the fine root biomass in the surface soil under E. camaldulensis was about three times that under the mixed stand. The fine root biomass of E. camaldulensis inside the stand and 10 meters away from the stand were comparable in the surface soils showing the presence of root competition with adjacent crops. Therefore, planting of E. camaldulensis in association or adjacent to croplands should be avoided. Nutrient and carbon pool of soil inside the mixed stand was generally higher than that of E. camaldulensis indicating that trees of the mixed stand recycled more nutrients to the soil.
AFRIKAANSE OPSOMMING: Die doel van hierdie studie was om die verskille tussen water- en voedingstofverhoudings van drie inheemse blaarwisselemde boomsoorte te vergelyk, viz., Cordia africana Lam., Croton macrostachyus Del., Millettia ferruginea (Hochst.) Baker en twee bekende eucalyptus spesies, viz., Eucalyptus camaldulensis Dehnh en Eucalyptus globulus Labil van Etiopië. Die studie het bestaan uit kweekhuis- en veldobservasies in Etiopië. As gevolg van beperkte navorsing ten opsigte van water- en voedingstofverhoudings in bladwisselende boomsoorte, het die kweekhuis-eksperimente bestaan uit 'n wye verkeidenheid water- en voedingstoftoetse. Saailinge is gegroei deur verskillende vlakke van water- en voedingstowwe by te voeg. Gaswisseling, waterpotensiaal, relatiewe hoeveelheid water, hoeveelheid voedingstowwe en produksie van biomassa is gemeet. Die veldobservasies was beperk tot oppervlak-wortelverspreiding en blaarvoedingstof hoeveelhede van volwasse bome, sowel as die effek op grondvoedingstowwe. Observasies was beperk tot geïsoleerde, gemengde en een spesie opstande, in die Badessa area, Oos Etiopië. Die studiearea was gekies op grond van die voorkoms van die gekose boomsoorte, sowel as die toepaslikheid van die bome vir die studie. In die kweekhuis is gevind dat die verhoogte watertekort die pre-sonop blaarwaterpotensiaal, relatiewe hoeveelheid water, stomatiese geleiding, fotosintetiese tempo, heelplant water-gebruikseffektiwiteit, plant hoogte, diameter, blaararea en biomassa produksie beduidend verminder het. Nie een van die eucalyptus spesies het vinniger as die bladwisselende spesies onder voldoende hidrasie gegroei nie. Dit was egter nie die geval onder die waterbeperkte toestande nie. C. macrostachyus en C. africana het ‘n hoër transpirasie tempo sowel as weefselvoedingstof waardes gehad as die ander spesies. Hierdie boomsoorte se wortelbiomassa was ook meer as die ander spesies, om vir die tempo van water- en voedingstofopname te akkomodeer. As gevolg van die vermoë om blare te kan oriënteer om direkte sonlig te vookom, het M. ferruginea ‘n hoër water-weefselpotensiaal en relatiewe waterinname gehad in vergelyking met die ander boomsoorte in beperkte water toestande. Die impak van gëinisieerde droogte het vinnig voorgekom en het meer skade aan die eucalyptus aangerig in vergelyking met die bladwisselende boomsoorte. Dit dui aan dat die eucalyptus-spesie nie ekstreme droogte kan oorleef nie, waar bladwisselende spesies hul blare laat afval en vir weke aan een dormant kan bly. Hierdie studie gee eksperimentele bewyse dat E. globulus minder bestand is teen droogte as E. camaldulensis. Beperkte N in die grond het veroorsaak dat daar ‘n algemene vermindering van weefsel Nkonsentrasie, N:P ratio, fotosintetiese tempo, stomatiese geleiding en fotosintetiese watergebruiks effektiwiteit in al die bestudeerde spesies was. Plante wat oor hoër blaar-stikstofkonsentrasiesbeskik, het hoër fotosintetiese kapasiteite wat aandui dat N ‘n belangrike rol in fotosintese en die groei van al die bestudeerde spesies speel. Die oorhoofse bevindings van die studie was, dat daar meer aandag gegee moet word aan grond-N as P omdat grond-P net ‘n kleiner rol speel in die fotosintetiese aktiwiteite van plante van al die spesies in vergelyking met N. Die ondersoek na weefselvoedingstof hoeveelhede het bewys dat die N:P ratio gebruik kan word om P-tekorte in plante aan te dui. Die N:P ratio kan egter nie die verskil in N-tekorte en gekombineerde tekorte van N en P aandui nie. Die studie van die geïsoleerde C. africana en C. macrostachyus bome op grondtipes in Badessa, Oos Etiopië het verbeterde grond-N, P en K onder kroondak gebiede getoon, daar was egter geen verskille in die ander grondvoedingstowwe wat bestudeer is nie. In toestande gelykstaande aan die van die kweekhuis, het C. macrostachyus en C. africana meer oppervlaksswortels ontwikkel. Die toename aan oppervlakswortels het ingedring op gewasse wat in assosiasie gegroei is, dit het egter ‘n positiewe effek op die grond gehad as gevolg van die hoë voedingstof-siklus-potensiaal. Die E. camaldulensis opstand is gevergelyk met ‘n gemengde opstand van bladwisselende spesies waar daar gevind is dat die fynwortel biomassa in die oppervlak grond onder die E. camaldulensis ongeveer drie keer soveel was as die van onder die gemengde opstand. Kompetisie met aangrensende gewasse is aangeui deurdat die fynwortel biomassa van E. camaldulensis binne die opstand en 10 meter weg van die opstand vergelykbaar was in die oppervlakgronde. Dit dui dus aan dat die plant van E. camaldulensis in assosiasie of aangrensend aan gewasse vermy moet word. Die teenwoordigheid van voedingstowwe en koolstof in die grond van die gemengde opstand was oor die algemeen hoër as die van die E. camaldulensis. Dit is ‘n aanduiding dat die bome van die gemengde opstand meer voedingstowwe aan die grond verskaf.
Hill, J. L. « The effect of forest spatial geometry on tree species diversity in tropical forest patches ». Thesis, Swansea University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637276.
Texte intégralChappelka, Arthur H. « The combined effects of ozone, sulfur dioxide and simulated acid rain on the growth of three forest tree species ». Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/74726.
Texte intégralPh. D.
Schaap, James Cornelis. « Nitrogen fertilization and tree species effect on the soil microbial communities and consequences for soil carbon ». Thesis, University of Canterbury. School of Biological Sciences, 2011. http://hdl.handle.net/10092/6582.
Texte intégralDiaz, Alexander P. « Effect of Diaprepes root weevil on leaf gas exchange and growth of select ornamental tree species ». [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011363.
Texte intégralBeggs, Margaret Ann. « The effect of different tree species on through fall and soil solution chemistry at Gisburn Forest ». Thesis, University of Aberdeen, 1991. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU078985.
Texte intégralRedwood, Mame S. « The Effect of Silviculture Management on the Spread of Three Invasive Species ». Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1337273012.
Texte intégralChen, Hsiang Ling. « Barrier Effects Of Roads And Traffic On Animal Occurrence, Space Use, And Movements ». Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/555947.
Texte intégralGetachew, Girma. « Tannins in tropical multipurpose tree species : localisation and quantification of tannins using histochemical approaches and the effect of tannins on in vitro rumen fermentation / ». Stuttgart : Ulrich E. Grauer, 1999. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009095947&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Texte intégralDe, Ridder Cornelius Henry. « The effect of Acacia karroo tree density on grass species composition, forage yield and quality in different rainfall regimes in the Eastern Cape, South Africa ». Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/2858.
Texte intégralUzakbaeva, Jyldyz. « Effect of different tree species on soil quality parameters in forest plantations of Kyrgyzstan Einfluss verschiedener Baumarten auf die Parameter der Bodenqualität unter Aufforstungen in Kirgisien / ». [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974376329.
Texte intégralKübler, Daniel Peter [Verfasser], Reinhard [Akademischer Betreuer] Mosandl, Thomas [Gutachter] Knoke et Reinhard [Gutachter] Mosandl. « Effect of topography on the distribution of tree species and radial diameter growth of potential crop trees in a tropical mountain forest in southern Ecuador / Daniel Peter Kübler ; Gutachter : Thomas Knoke, Reinhard Mosandl ; Betreuer : Reinhard Mosandl ». München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1220320145/34.
Texte intégralClesse, Margaux. « Étude multi-sites de la réponse de la fertilité chimique des écosystèmes forestiers dans un contexte de changements (dépôts atmosphériques et substitution d’essences) ». Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0009.
Texte intégralForest ecosystems often grow on acidic, nutrient-poor soils. In many places, high acidic atmospheric deposition (sulfuric and nitric acids) has significantly accelerated the acidification of soils and surface waters during the second half of the 20th century, frequently leading to soil fertility degradation and forest decline. In addition, species selection and/or substitution by forest management can also have a significant effect on the biogeochemical functioning of soils and forest ecosystems. In this context, their sustainability is questioned and it is necessary to quantify the evolution of the chemical fertility of forest ecosystems in the face of these pressures and to better understand their biogeochemical functioning, in order to ensure sustainable forest management. The main objectives of this thesis are i) to quantify the evolution of chemical fertility of forest ecosystems using four diagnosis methods: soil resampling, monitoring of soil solutions, foliar concentrations and calculation of the "input-output" budget, ii) to understand the mechanisms underlying this evolution and iii) to compare the results obtained by the different methods, taking into account the uncertainty surrounding the budget. To do this, we quantified the evolution of fertility over a period of 20 to 30 years by these 4 methods, on monospecific plots of the Breuil-Chenue site and on 8 level III plots of the RENECOFOR network. The results showed that the species had an effect on soil acidification and on the pools of exchangeable nutritive cations in the soil. Hardwoods appear to acidify soils less intensely than coniferous. A restoration of pH is observed under oak and beech, whereas acidification seems to continue under coniferous, especially under Douglas fir and pine, and even more under Nordmann fir and spruce. Soil acidification and associated nutrient losses have also been demonstrated on some RENECOFOR sites. Nitrate and sulphate seem to be the main drivers of acidification. However, their origin depends on the site studied: they are sometimes derived from current atmospheric deposition, but internal sources to the ecosystem may also intervene via excess nitrification (especially under Douglas fir, pine, oak at Breuil and CPS 77) or desorption of S into the soil (especially on RENECOFOR sites). Leaching of S and N and associated cations tends to acidify soils. However, the response of sites to acidification can vary, depending on the predominance of either biological or geochemical cycling. Sites identified with predominant geochemical cycling (CHS 41, CPS 77, HET 30, and SP 38) have nutrient pools supported more by weathering and atmospheric deposition fluxes, whereas the sites dominated by biological cycling (EPC 08, EPC 87, PS 67a, SP 57) have nutrient pools supported primarily by recycling fluxes. Finally, the results showed that the comparison between the different fertility diagnosis methods is not easy. Differences were highlighted, with sometimes contradictory results. Taking into account the uncertainty around the budget does not alone explain the differences observed by the soil resampling approach. Uncertainty in the choice of model could perhaps partly explain the origin of the discrepancies. This work highlights the importance of continuing research on i) understanding the response of forest ecosystems to changes in atmospheric deposition and species substitution and ii) assessing the uncertainties surrounding the different approaches to fertility diagnosis
Morath, Simon. « Effects of tree species diversity on insect herbivory ». Thesis, Royal Holloway, University of London, 2013. http://repository.royalholloway.ac.uk/items/916c671f-79af-41eb-99b1-df69faa84961/1/.
Texte intégralRibbons, Relena Rose. « Seeing the forest for the trees : tree species effects on soil microbial communities and nutrient cycling dynamics ». Thesis, Bangor University, 2017. https://research.bangor.ac.uk/portal/en/theses/seeing-the-forest-for-the-trees-tree-species-effects-on-soil-microbial-communities-and-nutrient-cycling-dynamics(f3ddf30e-c126-4345-b388-4384cfc8d617).html.
Texte intégralLiese, Rebecca [Verfasser], Ina Christin [Akademischer Betreuer] Meier, Ina Christin [Gutachter] Meier, Andrea [Gutachter] Carminati, Hermann [Gutachter] Behling, Michaela [Gutachter] Dippold, Markus [Gutachter] Hauck et Stefan [Gutachter] Scheu. « The effect of the mycorrhizal type on root-rhizosphere interactions in AM and ECM tree species : field studies and mesocosm experiments / Rebecca Liese ; Gutachter : Ina Christin Meier, Andrea Carminati, Hermann Behling, Michaela Dippold, Markus Hauck, Stefan Scheu ; Betreuer : Ina Christin Meier ». Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1178792072/34.
Texte intégralLiese, Rebecca [Verfasser], Ina Christin [Akademischer Betreuer] Meier, Ina Christin Gutachter] Meier, Andrea [Gutachter] [Carminati, Hermann Gutachter] Behling, Michaela [Gutachter] Dippold, Markus [Gutachter] [Hauck et Stefan [Gutachter] Scheu. « The effect of the mycorrhizal type on root-rhizosphere interactions in AM and ECM tree species : field studies and mesocosm experiments / Rebecca Liese ; Gutachter : Ina Christin Meier, Andrea Carminati, Hermann Behling, Michaela Dippold, Markus Hauck, Stefan Scheu ; Betreuer : Ina Christin Meier ». Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://nbn-resolving.de/urn:nbn:de:gbv:7-11858/00-1735-0000-002E-E59D-C-2.
Texte intégralLiu, Tengjiao. « Effects of Climate Change and Local Environmental Factors on Long Term Water Use Efficiency and Tree Growth in Different Forest Ecosystems ». Thesis, Griffith University, 2021. http://hdl.handle.net/10072/407567.
Texte intégralThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
Hood, Lorraine A. « Effects of pathogenic and mycorrhizal fungi on regeneration of two tropical tree species ». Thesis, University of Aberdeen, 2002. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU151993.
Texte intégralHealy, Chrystal. « The biodiversity-ecosystem functioning relationship : separating the effects of species richness, from those of species identity and environmental heterogeneity in a tropical tree plantation ». Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101136.
Texte intégralCatry, Filipe Xavier. « Fire effects on forest species in mediterranean basin ecosystems : ecology and management ». Doctoral thesis, ISA, 2013. http://hdl.handle.net/10400.5/6151.
Texte intégralSolberg, Bård Øyvind. « Effects of climatic change on the growth of dominating tree species along major environmental gradients ». Doctoral thesis, Norwegian University of Science and Technology, Department of Biology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-487.
Texte intégralThis thesis deals with effects of climate on tree growth of the dominating conifer species, Picea abies (L) Karst. (Norway spruce) and Pinus sylvestris L (Scots pine), in central Norway and Fennoscandia. Both species are sampled along major environmental gradients, i.e. altitude and oceanicity, and growth responses to climate, i.e. temperature and precipitation, are examined along these gradients. Additionally, time is considered as an environmental gradient and temporal responses are carefully deciphered. Special attention is given to large-scale climate oscillation and their effect on tree growth. In the individual papers the specific aims have been to:
1. identify climate variables (all seasons) with significant influence on radial tree growth of P. abies and P. sylvestris along major environmental gradients (Paper I-IV)
2. identify if and how the growth response to climate has changed through time along these gradients (Paper I-IV)
3. make interregional comparisons of P. sylvestris growth pattern across Fennoscandia from oceanic western Norway to continental eastern Finland (Paper III)
4. analyse to what degree large-scale circulation patterns of air masses are registered in regional tree growth of both P. abies and P. sylvestris (Paper I, III and IV)
5. discuss possible effects on radial tree growth of a predicted warmer climate (Paper I, III and IV)
Fernandes, Miguel V. « Effects of Changes in the Everglades on Two Indicator Species : Sigmodon Hispidus and Oryzomys Palustris ». Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/606.
Texte intégralBaptista, Mariana Dias. « Use of different street trees species and their effect on human thermal comfort ». Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-10112014-092618/.
Texte intégralAs contínuas transformações nas áreas urbanas têm trazido muitos problemas relacionados à perda da qualidade ambiental, como por exemplo, a falta de árvores nas ruas. Podemos dizer que a arborização urbana influencia diretamente no conforto térmico das cidades, e as pessoas podem realmente sentir na pele a diferença nas condições ambientais entre uma rua arborizada e outra sem árvores. Por isso, um melhor manejo destas árvores pode beneficiar a qualidade do ambiente local, e consequentemente, a qualidade de vida da população. Um dos primeiros passos nesse manejo é a escolha de espécies, porém poucos estudos abordam o real efeito desta escolha para as condições ambientais futuras do local. O presente trabalho tem como objetivo investigar o efeito do uso de diferentes espécies na arborização urbana para o conforto térmico na cidade de Piracicaba-SP. Para isso, foi medida a temperatura do ar, umidade relativa, velocidade do vento, e temperatura de globo. Os equipamentos foram distribuídos ao longo de três ruas diferentes onde uma das espécies escolhida prevalecia. Sibipiruna, Ipê-de-El-Salvador e Tipuana foram as espécies escolhidas dentre as árvores mais utilizadas nas ruas de Piracicaba. Imagens termais dos pontos de medição e questionários voltados à população local foram utilizados para auxiliar na interpretação. Todos os dados coletados foram aplicados no cálculo do Índice de Conforto Térmico Universal (UTCI). A presença de árvores influenciou diretamente nas variáveis climáticas estudadas. As três áreas apresentaram diferença significativa entre os pontos arborizados e não arborizados, tanto no período seco quanto no chuvoso. As ruas arborizadas apresentaram menor temperatura, maior umidade relativa e menor velocidade do vento (exceto na área 3). Os resultados podem ajudar na tomada de decisões baseando-se no papel das árvores dentro do ambiente urbano, como a melhoria do conforto térmico para a população.
Leonard, Norman. « The effects of the invasive exotic Chinese tallow tree (Triadica sebifera) on amphibians and aquatic invertebrates ». ScholarWorks@UNO, 2008. http://scholarworks.uno.edu/td/656.
Texte intégralPanter, Jonathan Paul. « Effects of drought and vegetation management on the establishment of 3 tree species in Northamptonshire, England ». Thesis, Cranfield University, 2006. http://dspace.lib.cranfield.ac.uk/handle/1826/8541.
Texte intégralLübbe, Torben Verfasser], Christoph [Akademischer Betreuer] [Gutachter] Leuschner et Dirk [Gutachter] [Hölscher. « Effects of tree species diversity and soil drought on productivity, water consumption and hydraulic functioning of five temperate broad-leaved tree species / Torben Lübbe. Betreuer : Christoph Leuschner. Gutachter : Christoph Leuschner ; Dirk Hölscher ». Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1105760073/34.
Texte intégralIacopino, Simone. « Exploring the multiple effects of the invasive alien black locust tree ». Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3425418.
Texte intégralLa robinia (Robinia pseudoacacia L.) è una delle specie arboree aliene invasive più diffuse in Europa e nel mondo. La diffusione di questa specie è stata favorita dalla sua amplitudine ecologica e dai suoi diversificati interessi economici, determinandone conseguenze positive e negative. Lo scopo della tesi è di approfondire le conoscenze sui fattori ecologici ed economici che hanno causato e caratterizzano la sua distribuzione. Sono state prese in considerazione diverse scale di studio, una scala di popolamento, una di paesaggio e una nazionale. A scala di popolamento, sono stati valutati gli impatti ecologici sulla comunità vegetale seguendo un metodo comparativo, basato su un campione di coppie di boschi, invasi o meno dalla robinia. È stato condotto un confronto degli impatti di robinia in diversi contesti ambientali mediante un approfondimento su un campione di tre tipi di paesaggio (rurale, fluviale e urbano). Un secondo approfondimento su un campione di tre città europee (Berlino, Padova e Roma) ha permesso invece di indagare gli impatti della copertura di robinia e delle proprietà della matrice urbana in contesti urbani a latitudini molto diverse. I fattori socio-economici sono stati indagati al livello nazionale italiano, collegandoli con i cambiamenti della copertura del suolo e della distribuzione della robinia. Le conoscenze sulle cause della diffusione della robinia e dei suoi effetti sulle risorse naturali vengono approfondite offrendo spunti di riflessione su un auspicabile bilanciamento tra conservazione della biodiversità e valorizzazione socio-economica di questa specie, a molteplici scale e contesti.
Myers, Teri S. « Effects of nitrogen and water on growth, photosynthesis, and leaf properties of deciduous tree species with consequences for gypsy moth herbivory ». Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1536.
Texte intégralTitle from document title page. Document formatted into pages; contains ix, 118 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.
Yee, Donald A. Juliano Steven A. « Effects of species interactions and productivity on aquatic macroinvertebrate diversity and community composition in tree holes patterns and mechanisms / ». Normal, Ill. : Illinois State University, 2006. http://proquest.umi.com/pqdweb?index=0&did=1251832821&SrchMode=1&sid=5&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1179157986&clientId=43838.
Texte intégralTitle from title page screen, viewed on May 14, 2007. Dissertation Committee: Steven A. Juliano (chair), Roger C. Anderson, L. Philip Lounibos, Wade A. Nichols, William L. Perry. Includes bibliographical references (leaves 145-162) and abstract. Also available in print.
Martin-Benito, Dario, Kevin Anchukaitis, Michael Evans, Río Miren del, Hans Beeckman et Isabel Cañellas. « Effects of Drought on Xylem Anatomy and Water-Use Efficiency of Two Co-Occurring Pine Species ». MDPI AG, 2017. http://hdl.handle.net/10150/625999.
Texte intégralHantsch, Lydia [Verfasser], Helge [Akademischer Betreuer] Bruelheide, Uwe [Akademischer Betreuer] Braun et Christopher C. [Akademischer Betreuer] Mundt. « Tree diversity effects on species richness and infestation of foliar fungal pathogens in European tree diversity experiments / Lydia Hantsch. Betreuer : Helge Bruelheide ; Uwe Braun ; Christopher C. Mundt ». Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2013. http://d-nb.info/1046563483/34.
Texte intégralKarlsson, Matts. « Natural regeneration of broadleaved tree species in southern Sweden : effects of silvicultural treatments and seed dispersal from surronding stands / ». Alnarp : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-6080-8.pdf.
Texte intégralDordel, Julia. « Effects of nurse tree species on growth environment and physiology of underplanted Toona ciliata Roemer in subtropical Argentinean plantations ». Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/11174.
Texte intégralContreras, Ruiz Esparza Ana Beatriz. « Effects of fire and selective logging on understory birds and tree species in a tropical montane forest, MeÌxico ». Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443181.
Texte intégralKarlsson, Matts. « Natural regeneration of broadleaved tree species in southern Sweden : effects of silvicultural treatments and seed dispersal from surrounding stands / ». Alnarp : Swedish University of Agricultural Sciences, 2001. http://diss-epsilon.slu.se/archive/00000042/.
Texte intégralAppendix reprints five papers and manuscripts, four co-authored with others. Includes bibliographical references. Also partially issued electronically via World Wide Web in PDF format; online version lacks appendix.
Rahman, Mohammad. « Effects of species and rooting conditions on the growth and cooling performance of urban trees ». Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/effects-of-species-and-rooting-conditions-on-the-growth-and-cooling-performance-of-urban-trees(1211fb4b-2eb9-4ddc-99e1-c1ee37fccc03).html.
Texte intégralBantle, Andreas Karl [Verfasser], et Egbert [Akademischer Betreuer] Matzner. « Tree species effects on the release of dissolved organic carbon and nitrogen from decomposing logs / Andreas Karl Bantle. Betreuer : Egbert Matzner ». Bayreuth : Universität Bayreuth, 2015. http://d-nb.info/1075807859/34.
Texte intégralKirby, Kathryn. « Land-use change in the Neotropics : regional-scale predictors of deforestation and local effects on carbon storage and tree-species diversity ». Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82264.
Texte intégralThe second question was examined in the context of a 3,198 ha area in Eastern Panama that is managed collectively by an Indigenous Embera community.
Jessen, Maria-Theresa. « Effects of climate warming on the performance of three boreal tree seedling species in interaction with moss cover and fire history ». Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-136177.
Texte intégralZatout, Masoud Moustafa Mohamed. « The roles of exotic and native tree species in preventing desertification and enhancing degraded land restoration in the north east of Libya : reciprocal effects of environmental factors and plantation forestry on each other, assessed by observations on growth and reproductive success of relevant tree species, and environmental factors analysed using multivariate statistics ». Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5708.
Texte intégralEi, Thandar Bol. « Effects of forest disturbances on edaphic factors and tree community structure of tropical evergreen forest ; a case study in Kyaik Htee Yoo Nature Reserve Forest, Mon State, Myanmar ». Kyoto University, 2017. http://hdl.handle.net/2433/228246.
Texte intégralKrueger, Kirk L. « Effects of Sampling Sufficiency and Model Selection on Predicting the Occurrence of Stream Fish Species at Large Spatial Extents ». Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/26214.
Texte intégralPh. D.
Tanjung, Rosye Hefmi Rechnelty. « Effects of glyphosate on seedlings of conifer and broadleaf tree species native to British Columbia, with particular regard to root-fungus interaction ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ61687.pdf.
Texte intégralLi, Ying [Verfasser], et Goddert [Akademischer Betreuer] Oheimb. « Effects of biodiversity and abiotic environment on the growth rates of native tree species in subtropical plantations / Ying Li ; Betreuer : Goddert Oheimb ». Lüneburg : Universitätsbibliothek der Leuphana Universität Lüneburg, 2017. http://d-nb.info/1125105364/34.
Texte intégralJacob, Andreas Verfasser], Christoph [Akademischer Betreuer] Leuschner et Dirk [Akademischer Betreuer] [Hölscher. « Effects of tree species composition on fine root biomass and dynamics in the rhizosphere of deciduous tree stands in the Hainich National Park (Thuringia) / Andreas Jacob. Gutachter : Christoph Leuschner ; Dirk Hölscher. Betreuer : Christoph Leuschner ». Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://d-nb.info/1044871601/34.
Texte intégralLangenbruch, Christina. « Effects of nutrient cycling through litter of different broadleaved deciduous tree species on soil biochemical properties and the dynamics of carbon and nitrogen in soil ». Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://hdl.handle.net/11858/00-1735-0000-000D-F1C2-F.
Texte intégralJones, Kevin Christopher. « Ecological effects of the feeding and construction activities of the Eurasian beaver (Castor fiber) in Scotland : implications for reintroduction ». Thesis, University of Stirling, 2006. http://hdl.handle.net/1893/211.
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