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Relevant bibliographies by topics / Pasture ecology / Dissertations / Theses

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Dissertations / Theses on the topic 'Pasture ecology'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 March 2023

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1

Parish, Roberta. "The role of disturbance in permanent pastures." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27505.

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This thesis investigates how small disturbances influence community structure in three permanent pastures. Small disturbances play an important role in providing spatial heterogeneity that permits new recruits to enter populations in closed sward communities, thereby promoting diversity and species co-existence. The thesis has four components: the first two are based on observation and measurement of the occurrence of small disturbances, molehills and dung pats, in three pastures. Within pasture seasonal changes in disturbance regime were related to changes in patterns of species abundance by

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2

Medcalf, Kathryn Ann. "The ecology and reinstatement of Carum verticillatum." Thesis, Aberystwyth University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337626.

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3

Pagnotta, Mario A. "The ecology and ecological genetics of pasture legumes in Syria." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292668.

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4

Borges, Paulo Alexandre Vieira. "Pasture arthropod community in Azorean Islands of different geological ages." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285174.

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5

Hafla, Aimee Nicole. "Winter cereals as a pasture-hay system in Montana." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/hafla/HaflaA1208.pdf.

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In 2006 - 2008 \'Willow Creek\' winter wheat and \'Trical 102\' triticale were evaluated for biomass production and forage quality under grazing and hay systems in Montana. Forage cultivars of winter wheat and triticale were subjected to a single grazing event at three growth stages (vegetative, boot, or heading) in the late spring. Subsequent regrowth from each grazing event was harvested as hay. Growth of winter cereals was modeled with environmental conditions. Both cultivars reached 100% headed between accumulated growing degree day (base 5 CÂ°) 1090 and 1245 (between July 7 and

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6

Abaye, Azenegashe Ozzie. "Influence of grazing sheep and cattle together and separately on soils, plants and animals." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-07282008-134554/.

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7

Manning, Paul. "Response of invertebrate communities to intensive management of improved pasture ecosystems." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:266bd0f5-19ba-49f8-aab0-44a62567c80e.

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The number of people on our planet is projected to rise to between 9.4 and 10 billion by 2050. Some estimates suggest that current levels of food production will need to double to feed this population. Increasing the intensity of food production on existing agricultural land will be a crucial element in meeting this goal, but practices associated with intensive management can cause biodiversity declines and erode the ecosystem functions that underpin production. My work explores agricultural intensification within the context of pasture-based cattle production. I focus on a variety of ecosyste

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8

Hawley, Tanya Joy. "Mechanisms Underlying Frog Occupancy Patterns in a Landscape Mosaic of Tropical Forest and Pasture." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_dissertations/86.

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Habitat modification is the primary cause of amphibian population declines worldwide. Some species survive in modified habitats whereas others become restricted to small, isolated forest patches. Although many studies compare species richness and composition between modified and intact habitats, the factors and mechanisms that maintain biodiversity in these landscapes are poorly understood. I asked how life history traits and habitat features influence interspecific variation in frog occupancy patterns in tropical pasture and forest. To identify mechanisms underlying occupancy patterns, I

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9

Braddick, Lynda. "'We don't go to the casino but we're the biggest gamblers in the world': drivers of change in the Mt Magnet and Upper Gascoyne regions." Thesis, Braddick, Lynda (2006) 'We don't go to the casino but we're the biggest gamblers in the world': drivers of change in the Mt Magnet and Upper Gascoyne regions. Masters by Research thesis, Murdoch University, 2006. https://researchrepository.murdoch.edu.au/id/eprint/431/.

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This thesis examines the complex environmental, social, economic and political challenges surrounding sustainable land use of rangelands by European leaseholders in Western Australia. A study of historical, socio-economic and technological events, combined with the development of social values and policy, exposed a broad suite of factors that shaped pastoralism and grazing, and continues to influence development in these regions today. The thesis also explained how the emergence of the sustainable development paradigm is raising awareness of the ways societies define the issues of development,

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10

Braddick, Lynda. "'We don't go to the casino but we're the biggest gamblers in the world' : drivers of change in the Mt Magnet and Upper Gascoyne regions /." Braddick, Lynda (2006) 'We don't go to the casino but we're the biggest gamblers in the world': drivers of change in the Mt Magnet and Upper Gascoyne regions. Masters by Research thesis, Murdoch University, 2006. http://researchrepository.murdoch.edu.au/431/.

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This thesis examines the complex environmental, social, economic and political challenges surrounding sustainable land use of rangelands by European leaseholders in Western Australia. A study of historical, socio-economic and technological events, combined with the development of social values and policy, exposed a broad suite of factors that shaped pastoralism and grazing, and continues to influence development in these regions today. The thesis also explained how the emergence of the sustainable development paradigm is raising awareness of the ways societies define the issues of development,

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11

Karki, Uma Goodman Mary Schmitt. "Southern-pine silvopasture systems forage characteristics, soil quality, and landscape utilization by cattle /." Auburn, Ala, 2008. http://hdl.handle.net/10415/1409.

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12

Vink, Stefanie Nicoline. "Factors affecting the community structure of bacteria, arbuscular mycorrhizal fungi and nematodes in the soil of the machair agricultural system." Thesis, University of Aberdeen, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=165823.

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Machair is a habitat found predominantly in coastal areas of the north–west of Scotland and is characterised by a low-input, rotational arable system interspersed with semi-natural grasslands. Land management is an essential part of the machair system as both intensification and abandonment threaten its future. Little is known about this system in terms of its below ground communities. A survey was conducted over a three season, two year period for molecular determination of bacterial, AM fungal and nematode community structure. Cropped, fallow and undisturbed grassland were sampled; soil and

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13

Frost, William E. "The ecology of cereal rust mite Abacarus hystrix (Nalepa) in irrigated perennial dairy pastures in South Australia /." Title page, contents and summary only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phf9398.pdf.

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14

Milsom, Timothy Philip. "On the ecology of lapwings Vanellus vanellus on aerodromes, with reference to the birdstrike hazard." Thesis, Coventry University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313154.

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15

Burkmar, Richard James. "The effects of upland pasture improvement on breeding passerine populations, particularly skylarks and meadow pipits." Thesis, Cardiff University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.232878.

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16

Pihlgren, Aina. "Small-scale structures and grazing intensity in semi-natural pastures : effects on plants and insects /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200713.pdf.

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17

Bankroff, Timothy J. "Arthropod community response to high-intensity, low-frequency cattle grazing events and pasture succession." Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1417541806.

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18

Dalby, Paul Reginald. "Competition between earthworms in high rainfall pastures in the Mt. Lofty Ranges, South Australia." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phd137.pdf.

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Copy of author's previously published work inserted. Bibliography: leaves 261-306. The objectives of the project were: i. to determine whether there are competitive interactions between Aporrectodea trapezoides and A. caliginosa and A. rosea.--ii. to investigate compeditive interactions between A. calignosa, Microscolex dubius and A. trapezoides.--iii . to determine the likely impact of A. longa on soil fauna, especially the native earthworm, Gemascolex lateralis, in native ecosystems.

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19

Slaughter, Lindsey C. "SOIL MICROBIAL COMMUNITY RESPONSE TO CLIMATE CHANGE: RESULTS FROM A TEMPERATE KENTUCKY PASTURE." UKnowledge, 2012. http://uknowledge.uky.edu/pss_etds/8.

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Climate change is likely to alter plant species composition and interactions between plants and soil microbes that together dictate the quantity and quality of forage produced in pastures, the base of animal production in central Kentucky. This study assessed the seasonal dynamics of soil microbes and their response to increased temperature (+3oC) and growing season precipitation (+30% of the mean annual). Total soil microbial biomass, community composition, enzyme activities, potential carbon mineralization, and catabolic responses to selected substrates were measured seasonally in the differ

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20

Carter, Richard T. "Foraging Habitat Selection by Ohio Bats: An Examination between Eastern Second Growth Forest, Eastern Old Growth Forest, and Pasture Land." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1198003305.

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21

Lloyd, Davidson A. "The effect of forest to pasture conversion on soil biological diversity and function." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/711.

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Recent declines in returns from primary forest products in New Zealand and projected increases in world food prices have led to the land-use conversion from plantation forest to pastoral farming in many lowland areas. After decades of forest cover the soils are in many cases less than adequate for pastoral farming, as they are acidic, with toxic levels of exchangeable aluminum, and contain low levels of available nitrogen (N), very high carbon (C):N ratio, and are devoid of earthworms and structural integrity. Overcoming the major site limitations of low soil pH and available N was a major pri

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22

Wraith, Jon M. "Effect of Short Duration Grazing on Soil Moisture Depletion and Plant Water Status in a Crested Wheatgrass Pasture." DigitalCommons@USU, 1986. https://digitalcommons.usu.edu/etd/6445.

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A short duration grazing system was utilized to determine the effects of intensive periodic defoliation during spring on soil moisture depletion patterns and plant water status in a crested wheatgrass (Agropvron cristatum and A. desertorum) pasture in central Utah. Exclosures were constructed to compare grazed and ungrazed responses. Soil moisture was monitored to a depth of 193 cm at one to two week intervals from mid-April to late-September using a neutron moisture gauge. Predawn and midday leaf water potentials were estimated using a pressure chamber technique. The two paddocks included in

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23

Doole, Graeme John. "Value of perennial pasture phases in dryland agricultural systems of the eastern-central wheat belt of Western Australia." University of Western Australia. School of Agricultural and Resource Economics, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0213.

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Over the past thirty years, price relativities and technological development have motivated an increase in the area of land allocated to cropping, as opposed to pasture production, throughout the central wheat belt of Western Australia. Nevertheless, reducing the proportion of pasture in these rotations has challenged the future productivity of farming systems in this area. First, the frequent application of selective herbicides for weed control in extended cropping rotations has promoted the development of herbicide resistance in a number of major agricultural weeds. Second, the primary use o

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24

Bonilla, Adriana Lucia Castellanos. "Balanço de nitrogênio em microbacias pareadas (floresta vs. pastagem) no estado de Rondônia." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-21062005-153635/.

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O ciclo do nitrogênio vem sendo alterado pelas atividades antropogênicas, em função do incremento de culturas, como as leguminosas, a queima de combustíveis fósseis e o desmatamento de florestas para uso agrícola e pecuário. Em regiões de climas temperados, existem muitas informações sobre o ciclo biogeoquímico deste elemento e sobre o papel das alterações antropogênicas no mesmo. Entretanto, em regiões tropicais, onde o ritmo do desmatamento ainda é intenso, poucas são as informações sobre este elemento. Em função disto, o presente trabalho visa fornecer informações sobre possíveis alteraçõe

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25

Leathwick, D. M. "Applied ecology of the Tasmanian lacewing Micromus tasmaniae Walker (Neuroptera : Hemerodiidae)." Lincoln College, University of Canterbury, 1989. http://hdl.handle.net/10182/1044.

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The Tasmanian lacewing (Micromus tasmaniae Walker) is one of the most common aphid predators occurring in lucerne crops in New Zealand. A comparison of sampling techniques, and the output from a simulation model, suggest that the abundance of this lacewing may have been significantly underestimated in the past. Although the occurrence of aphid predators was erratic M. tasmaniae occurred more often and in far greater numbers (up to 100 m⁻²) than any other predator species. A simulation model for lacewing development in the field indicated that the large adult populations which occurred could be

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26

McDonald, Kathi. "Variation in morphology, salinity and waterlogging tolerance and resource allocation in strawberry clover (Trifolium fragiferum L.) : implications for its use in mildly saline soils in southern Australian farming systems." University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0105.

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[Truncated abstract] In southern Australian farming systems the replacement of deep-rooted perennial native vegetation with shallow-rooted annual crops and pastures has resulted in rising groundwater tables and an increased incidence of dryland salinity. It has been suggested that to address this issue by restoring hydrological balance, large areas of agricultural land need to be vegetated with perennial plants. One of the most agriculturally productive ways to do this is to introduce perennial pastures, both into upslope groundwater

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27

Hohlenwerger, Camila Celestino. "A estrutura da paisagem e o potencial controle das “cigarrinhas-das-pastagens&rdquo." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-05122016-143451/.

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O controle biológico de pragas é um importante serviço ecossistêmico em áreas agrícolas e de pastagem, podendo trazer tanto benefícios econômicos quanto ambientais. Em áreas de pastagens tropicais, as a cigarrinhas-das-pastagens podem trazer prejuízos da ordem de US$ 800 milhões por ano, sendo assim uma praga de grande importância. Para entendermos os fatores que potencialmente regulam o controle biológico destas cigarrinhas no nível da paisagem, nós avaliamos, através de experimentos de predação, o efeito da quantidade de cobertura florestal, do tamanho do fragmento e da distância na matriz

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28

Weber, Daniel Adam. "GRASSLAND SUSTAINABILITY IN KENTUCKY: CASE STUDIES QUANTIFYING THE EFFECTS OF CLIMATE CHANGE ON SLUG HERBIVORY IN PASTURES AND DIFFERENT HOME LAWN SYSTEMS ON TURF GREENHOUSE GAS EMISSIONS." UKnowledge, 2014. http://uknowledge.uky.edu/pss_etds/39.

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Grasslands comprise the greatest biome by land area, are sensitive to environmental factors affected by climate change, and can impact future climate change through their ability to store and release greenhouse gasses (GHGs). I performed two studies: 1) evaluated the effects of increased temperature and precipitation on slug herbivory/abundance and pasture forage production; 2) quantified different homeowner lawn system effects on soil-to-atmosphere GHG emissions. Climate change will likely affect pasture forage production, with implications for slug herbivory and abundance. I found little evi

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29

Sano, Bruno. "Relação entre características funcionais e o desempenho de espécies arbóreas nativas em um plantio de restauração." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-13122016-094737/.

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Em ambientes degradados, a restauração ecológica visa acelerar o processo de sucessão ecológica. A técnica mais utilizada para a restauração de ambientes muito degradados é o plantio de mudas. A seleção das espécies é determinante para o sucesso dos projetos de restauração, pois as espécies precisam se estabelecer e crescer diante das condições do ambiente. Utilizar a abordagem de características funcionais pode ser uma ferramenta promissora para auxiliar a seleção de espécies em projetos de restauração. Em ambientes florestais, há evidências de que as características funcionais afetam o desem

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Norström, Paananen Marcus, Magnus Boström, and Christian Ahlgren. "Power Lines - Wasteland or Biodiversity Hotspots?" Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4541.

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<p>Det svenska kulturlandskapet har förändrats radikalt under de senaste 200 åren från ett varierat och heterogent landskap till ett mer monotont, homogeniserat landskap som följd av att olika former av mänskligt resursutnyttjande har effektiviserats. Detta har lett till en fragmentering av livsmiljöerna för flera av kulturlandskapets arter. Kraftledningsgator kan tänkas hysa naturtyper som påminner om vissa av de nu försvunna eller fragmenterade livsmiljöerna (t ex betad skogsmark och vissa typer av ängsmarker) och skulle kunna ha en viktig betydelse som reträttplats och/eller spridningskorri

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31

GONÇALVES, Tamires. "Pasture trees: regeneration, farmer management or original flora remnant?" Universidade Federal de Alfenas, 2015. https://bdtd.unifal-mg.edu.br:8443/handle/tede/830.

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Embora seja um consenso crescente que o declínio das árvores isoladas em paisagens agrícolas merece urgente atenção, tais elementos não têm sido considerados em estratégias conservacionistas. Isso se deve, em parte, à escassez de conhecimento a respeito dos fatores que afetam estas árvores. Poucos são os estudos que abordam as relações entre as práticas de manejo de pastagens e a abundância e riqueza do componente arbóreo em pastos, sendo que o efeito do distanciamento de manchas florestais é ainda pouco compreendido. Diante disso, os objetivos deste estudo foram (i) descrever a composição de

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32

Petrovan, Silviu Octavian. "The landscape ecology of brown hares and European rabbits in pastures in the north east of England." Thesis, University of Hull, 2011. http://hydra.hull.ac.uk/resources/hull:5118.

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The declines of the brown hare (Lepus europaeus), a priority species for conservation in the UK, may have been caused by changes in agricultural management. This study aims to identify hare distribution, density, habitat selection and demography in grass lands in order to benefit their future conservation. In addition, this study aims to investigate the impact of current agricultural management on the populations of the European wild rabbit (Oryctolagus cuniculus), a major agricultural pest and potential competitor for hares. Hare and rabbit populations were surveyed in several large, pasture-

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33

O'Beirne-Ranelagh, Elizabeth Grenville. "Biodiversity and horse grazing : the ecology and management of pastures in Cambridgeshire in relation to fertiliser use." Thesis, University of Cambridge, 2001. https://www.repository.cam.ac.uk/handle/1810/283997.

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34

Galin, Isolde. "How former arable fields with permanent grazing differ from managed semi-natural pastures in Sweden." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158072.

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New farming needs and innovations have, over time, led to changes in land use. Arable fields have been turned into pastures and semi-natural pastures into arable fields. Due to the ecological value of continually grazed semi-natural pastures in Sweden the aim of this study is to find out how former arable fields that are permanently grazed differ from semi-natural pastures. In this study I selected appropriate semi-natural pastures from a national monitoring program on seminatural- pastures and meadows. Plots continuously grazed were compared with grazed plots on former arable fields. Pair-wis

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35

Berndt, Lisa A. "The effect of floral resources on the leafroller (Lepidoptera: Tortricidae) parasitoid Dolichogenidea tasmanica (Cameron)(Hymenoptera: Braconidae) in selected New Zealand vineyards." Lincoln University, 2002. http://hdl.handle.net/10182/1045.

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In this study, buckwheat (Fagopyrum esculentum Moench) and alyssum (Lobularia maritima (L.)) flowers were used to examine the effect of floral resources on the efficacy of the leafroller parasitoid Dolichogenidea tasmanica (Cameron) in vineyards. This was done by assessing the influence of these flowers on parasitoid abundance and parasitism rate, and by investigating the consequences of this for leafroller abundance. In laboratory experiments, alyssum flowers were used to investigate the effect of floral food on the longevity, fecundity and sex ratio of D. tasmanica. Dolichogenidea tasmanica

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Bartolomé, Jordi. "Ecologia dels ramats d'oví i cabrum de la Calma (Parc Natural del Montseny)." Doctoral thesis, Universitat Autònoma de Barcelona, 1995. http://hdl.handle.net/10803/3687.

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S'han estudiat alguns aspectes de l'ecologia de la ramaderia extensiva d'oví i cabrum a l'altiplà de la Calma (Montseny), de llarga tradició ramadera, on els darrers anys s'ha incrementat en nombre de bestiar. S'ha observat que dels recursos tròfics de la zona, les herbàcies de les landes ofereixen més quantitat d'aliment i les dels prats més qualitat. A partir de la composició botànica de la dieta dels ramats, estimada mitjançanta anàlisi microhistològica de les femtes, es conclou que les ovelles i les cabres són herbívors generalistes, però en la dieta de les cabres dominen les espècies llen

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Fonseca, Daniel Gonçalves da. "Efeitos da presença de macrófitas nos macroinvertebrados de córregos tropicais." Universidade Federal de São Carlos, 2011. https://repositorio.ufscar.br/handle/ufscar/2049.

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Made available in DSpace on 2016-06-02T19:31:59Z (GMT). No. of bitstreams: 1 4000.pdf: 1405688 bytes, checksum: 20351183bd8a8281e307e66398831dbb (MD5) Previous issue date: 2011-04-08<br>Universidade Federal de Minas Gerais<br>The riparian forest deforestation by pasture activities allows greater solar incidence on the streams bed. The high input of light favours the development of aquatic macrophytes, which also contributing with the high primary production rate and are important substrate for aquatic organisms. This substrate generates stability subunities and complex microhabitats which ar

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Souza, Silvana Cristina Pereira Muniz de. "Análise de alguns aspectos de dinâmica florestal em uma área degradada no interior do parque estadual do Jurupará, Ibiúna, São Paulo." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-26082002-142036/.

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O presente trabalho teve como objetivo investigar a resiliência de uma área desflorestada há aproximadamente 20 anos, ocupada atualmente com pastagem e cultivo de Citrus sp. Essa resiliência foi avaliada através dos seguintes aspectos da dinâmica florestal: análise do banco de sementes, da chuva de sementes e de indivíduos jovens regenerantes. Este trabalho foi conduzido no Parque Estadual do Jurupará (23°51' S e 47°11' W), abrangendo os municípios paulistas de Ibiúna e Piedade, em uma região de transição entre a Floresta Ombrófila Densa e a Floresta Estacional Semidecidual. Foram alocadas trê

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39

Tonelli, Mattia. "Effects of different pastures management on dung beetle communities in a sub-mountainous landscape of central Italy: a multicomponent biodiversity and ecological process analysis." Doctoral thesis, Universidad de Alicante, 2017. http://hdl.handle.net/10045/65761.

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Los escarabajos coprófagos (Coleoptera: Scarabaeoidea) son un grupo de insectos muy importante en términos de diversidad y biomasa en los pastos de la cuenca del Mediterráneo. A pesar de su importancia ecológica, los escarabajos coprófagos están amenazados por varios factores, entre los cuales se destacan los cambios en el manejo de la ganadería tradicional. El objetivo general de esta tesis fue evaluar los efectos del abandono de la ganadería, su extensificación y uso histórico de productos médico veterinarios sobre las comunidades de escarabajos coprófagos usando medidas de biodiversidad y

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40

Pardo, Guereño Iker. "Distribution and dynamics of multiple components of plant diversity in a high mountain area: the Ordesa-Monte Perdido National Park = Distribución y dinámica temporal de los diferentes componentes de la diversidad vegetal en la alta montaña: el Parque Nacional de Ordesa y Monte Perdido." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/384840.

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The aim of this thesis was to explore the distribution of the taxonomic, phylogenetic and functional components of plant diversity in high mountains, and to show how different components of diversity have responded to land-use and climate change over the last two decades. To address this aim, we used a multiple approach at different scales, by combining information from biodiversity databases and descriptive and experimental data gathered in the field. Some methodological improvements were implemented to account for the main sources of uncertainty inherent in the baseline data. The study was c

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Robinson, K. A. "Use of floral resources by the lacewing Micromus tasmaniae and its parasitoid Anacharis zealandica, and the consequences for biological control by M. tasmaniae." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/823.

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Arthropod species that have the potential to damage crops are food resources for communities of predators and parasitoids. From an agronomic perspective these species are pests and biocontrol agents respectively, and the relationships between them can be important determinants of crop yield and quality. The impact of biocontrol agents on pest populations may depend on the availability of other food resources in the agroecosystem. A scarcity of such resources may limit biological control and altering agroecosystem management to alleviate this limitation could contribute to pest management. This

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Baranauskaitė, Jurgita. "Elninių žvėrių mitybos ypatumai skirtingo mišrumo medynuose." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100621_113543-44186.

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Tyrimams yra pasirinkti medynai esantys skirtingose miškų urėdijose ir atitinkantys skirtingas medžioklės plotų kategorijas: Buktos miško masyvas (VĮ Marijampolės miškų urėdija); Pagėgių miško masyvas (VĮ Šilutės miškų urėdija); Naujininkų miško masyvas (VĮ Šilutės miškų urėdija); Darsūniškio miškas (VĮ Kaišiadorių miškų urėdija). Tyrimų metu buvo išskirtos apskaitos aikštelės, kuriose buvo nustatytas medelių bei krūmų skabymo intensyvumas, dalis pašarų sudėtyje, utilizacijos faktorius, sutinkamumas. Nustatytos labiausiai ir mažiausiai mėgiamos trako ir pomiškio rūšys. Taip pat buvo atlikta ir

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Glienke, Carine Lisete. "Ecologia do pastejo de cordeiras em pastagem de azevém e trevo vermelho sob intensidades de desfolha." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/10728.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In the period May-November 2007 experiment was conducted in an area of the Federal University of Santa Maria, was studied the relationship between the pasture dynamics and the ingestive behavior of lambs, grazing Italian ryegrass (Lolium multiflorum Lam.) and red clover (Trifolium pratense L.) pasture under different defoliation intensities. Rotational grazing was used and the interval between grazing cycle was determined by the thermal sum of 313 degree-days. The evaluations of ingestive behavior were made by visual observation, i

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Guardiola, i. Bufí Moisès. "Efectes de la pèrdua i fragmentació de pastures mediterrànies sobre la riquesa, composició i relacions tròfiques de plantes i papallones." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/300736.

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La pèrdua i fragmentació dels hàbitats estan considerades com una de les causes més importants de pèrdua de biodiversitat a escala local, regional i global, causant la rarefacció i extinció d’algunes espècies. Bo i això, no es coneix bé l’abast real que provoca la pèrdua i fragmentació dels hàbitat ja que sovint es donen asincronies entre aquesta pèrdua i la consegüent extinció d’espècies, fet que comporta un deute d’extinció. Tot i que es considera que el deute d’extinció és un fenomen molt estès, el coneixement sobre els mecanismes i processos que el causen encara és molt incomplert, així co

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Vazquez, Ana M. "Possible Drivers in Endophyte Diversity and Transmission in the Tomato Plant Bacterial Microbiome." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1594918263597025.

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Laubertie, Elsa. "The role of resource subsidies in enhancing biological control of aphids by hoverflies (Diptera: Syrphidae)." Diss., Lincoln University, 2007. http://hdl.handle.net/10182/984.

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In this thesis, experiments were conducted in the laboratory and the field to determine whether the provision of floral resources to hoverflies could enhance the biological control of aphids. The overall aim was to clarify hoverfly behaviour and ecology in an agroecosystem in order to understand the potential of these insects for biocontrol under a conservation biological control (CBC) regime. A preliminary experiment in New Zealand compared the effect of different coloured water-traps on catches of the hoverflies Melanostoma fasciatum (Macquart) and Melangyna novaezelandiae (Macquart). Signif

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Cruz, Natan Teles. "Dinâmica do acúmulo de forragem e composição química do capim faixa-branca submetido a frequências de desfolhação." Pós-Graduação em Zootecnia, 2017. https://ri.ufs.br/handle/riufs/6847.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>This work was carried out with the objective of evaluating the dynamics of forage accumulation and structural characteristics of the Digitaria eriantha submitted to different defoliation frequencies from January 2015 to February 2016. Four frequencies of defoliation were evaluated: very (25 cm), high (35 cm), medium (45 cm) and low (55 cm), in two seasons of the year: higher sunshine (September to March) and lower sunshine (April to August). A randomized complete block design with four replicates was used. In general, the r

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Melin, Emelie. "The impact of tree size, sun exposure and geographical position on the species richness of epiphytic lichens associated with coarse oak trees in southern Sweden." Thesis, Linköpings universitet, Biologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148528.

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Felling of old trees as well as changes in land use and management of wooded pastures has led to the decline of biodiversity associated with old deciduous trees in Europe. This also applies to Sweden’s most species rich tree, the oak tree (Quercus robur), which changes with age and develops, for example, a rougher bark structure, deeper bark fissures and cavities. These give rise to several different microhabitats that favor the presence of lichens, mosses and wood-dependent organisms. To preserve the biodiversity, environmental conditions linked to a high diversity need to be identified and d

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Sjödin, N. Erik. "Pollinating insect responses to grazing intensity, grassland characteristics and landscape complexity : behaviour, species diversity and composition /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200755.pdf.

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Carvalho, Anne Caroline Barbosa de. "Avaliação da perda de solo por fluxo superficial em cultivos puro e consorciado." Universidade Federal de Juiz de Fora, 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/1686.

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