Log in

Relevant bibliographies by topics / Competitive species / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Competitive species.

Dissertations / Theses on the topic 'Competitive species'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Competitive species.'

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.

1

Roney, Hillary Christine. "Competitive Exclusion of Cyanobacterial Species in the Great Salt Lake." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2476.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Morghan, Kimberly Jo Reever. "Competitive interactions between native grasses and invasive species in California grasslands /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ross, Pamela. "Caesium-137 uptake in two grass species and the effects of competitive ions." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389595.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

ICENHOUR, CRYSTAL RENEE PERRY. "EXPERIMENTAL EVIDENCE FOR COMPETITIVE COEXISTENCE OF TWO SPECIES OF PNEUMOCYSTIS WITHIN RAT LUNGS." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1012244966.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Thomas, Heather M. "Competitive Interactions Between a Native and Exotic Trout Species in High Mountain Streams." DigitalCommons@USU, 1996. https://digitalcommons.usu.edu/etd/5264.

Full text

Abstract:

Populations of the introduced book trout, Salvelinus fontinalis, have recently become more widespread and abundant in western North American streams, possible at the expense of native Colorado River cutthroat trout, Oncorhynchus clarki pleuriticus. We examined the intensity and potential mechanism of competition between these species. Feeding experiments in laboratory stream channels showed that cutthroat trout feeding efficiency decreases in the presence of a brook trout. Decreased feeding efficiency appeared to be due to interference, as cutthroat trout were inactive in the presence of the b

APA, Harvard, Vancouver, ISO, and other styles

6

Pohl, Angelika [Verfasser], and Niels [Akademischer Betreuer] Dingemanse. "An analysis of competitive traits in pest ant species / Angelika Pohl ; Betreuer: Niels Dingemanse." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1198111844/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Schwartz, Lauren Michele. "The competitive response of Panicum virgatum cultivars to non-native invasive species in southern Illinois." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/765.

Full text

Abstract:

Historically, the tallgrass prairie (TGP) was the largest ecosystem in North America, but today only about 10-15% of the original extent exists today. Some areas have experienced more extreme loss, for example in the state of Illinois less than 0.01% of high-quality native tallgrass prairie remains. Non-native invasive species are a recent phenomenon that threatens the integrity of surviving TGP communities. Ecotypes of dominant C4 grasses are the basis of numerous cultivars, many of which are utilized in prairie restorations. In this study, the effects of three invasive species (Bromus inermi

APA, Harvard, Vancouver, ISO, and other styles

8

Nielsen, Kristin Norma Astrid Toftgaard. "Predicting competitive ability from plant traits: A comparative study of 63 terrestrial herbaceous plant species." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/10227.

Full text

Abstract:

There is critical need for studies on interspecific competition which enable general principles to be deduced that apply beyond the species and conditions of a particular study or site. Studies on plant traits are a key part of this search for general principles. I measured relative competitive ability in 63 terrestrial herbaceous plant species using the phytometer Trichostema brachiatum, to test whether competitive ability can be predicted from simple measurable plant traits. The test species utilised in this experiment represented a wide array of terrestrial vegetation types (e.g. rock. barr

APA, Harvard, Vancouver, ISO, and other styles

9

Kiger, Sarah. "Competitive ability of native and non-native prairie species in response to soil nitrogen and density." Connect to resource, 2006. http://hdl.handle.net/1811/6621.

Full text

Abstract:

Thesis (Honors)--Ohio State University, 2006.<br>Title from first page of PDF file. Document formatted into pages: contains 21 p.; also includes graphics. Includes bibliographical references (p. 12-13). Available online via Ohio State University's Knowledge Bank.

APA, Harvard, Vancouver, ISO, and other styles

10

Long, Michael A. "Tree species composition and oak competitive status in upland hardwood stands approaching mid-rotation in southern Illinois /." Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1404346481&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Mkango, Sara. "Multi-species models of Antarctic krill predators : do competitive effects influence estimates of pre-exploitation whale abundance and recovery?" Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/4911.

Full text

Abstract:

Includes abstract. Includes bibliographical references (leaves 92-111).<br>Many species of baleen whales and seals in the Southern Hemisphere were subject to intensive overexploitation by commercial harvesting in the last two centuries, and many populations were reduced to very low levels. Krill is the dominant prey item of these species. Harvesting (to near extinction) of the large baleen whales (blue, humpback and fin whales) from the start of the 20th century led to a likely increase in the availability of krill to other krill predators such as the Antarctic minke whales and crabeater seal

APA, Harvard, Vancouver, ISO, and other styles

12

Poland, Therese M. "Competitive interactions between the spruce beetle, Dendroctonus rufipennis, Kirby, and two secondary species, Ips tridens, Mannerheim, and Dryocoetes affaber, Mannerheim, (Coleoptera: Scolytidae)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24341.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

VERSACE, Soraya. "Influence of climatic variations and competitive interactions on the productivity of mountain forests in Italy." Doctoral thesis, Università degli studi del Molise, 2020. http://hdl.handle.net/11695/97766.

Full text

Abstract:

La crescita degli alberi è influenzata da molteplici fattori tra cui, il clima e i processi di competizione. I cambiamenti climatici hanno un forte impatto sulla crescita degli alberi e possono causare impatti negativi sulle foreste, soprattutto nel bacino del Mediterraneo. Tuttavia, la crescita degli alberi è influenzata anche dalle interazioni competitive. Per quantificare le interazioni competitive tra gli alberi vengono utilizzati indici di competizione, che normalmente sono calcolati su aree di piccole dimensioni. Prevedere le interazioni competitive su aree più estese può essere molto im

APA, Harvard, Vancouver, ISO, and other styles

14

Winslow, Christopher J. "Competitive interactions between young-of-the-year smallmouth bass (Micropterus Dolomieu) and round goby (Apollonia melanostomus)." Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1288625667.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Walker, Emer Ann [Verfasser], Johannes [Akademischer Betreuer] Kollmann, and Karl F. [Akademischer Betreuer] Auerswald. "It’s a matter of source: The competitive effects of dominant species on calcareous grassland forbs / Emer Ann Walker. Gutachter: Johannes Kollmann ; Karl F. Auerswald. Betreuer: Johannes Kollmann." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1064075509/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Officer, Andrew Russell. "Powdery Mildew (Erysiphe cruciferarum) Affects the Allelopathic and Competitive Abilities of Invasive Garlic Mustard (Alliaria petiolata)." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1363272398.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Laube, Julia Verfasser], Annette [Akademischer Betreuer] Menzel, Tim H. [Akademischer Betreuer] Sparks, and Susanne S. [Akademischer Betreuer] [Renner. "Performance of native and invasive plant species under climate change – phenology, competitive ability and stress tolerance / Julia Laube. Gutachter: Annette Menzel ; Tim H. Sparks ; Susanne S. Renner. Betreuer: Annette Menzel." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1075317274/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Wendelberger, Kristie Susan. "Evaluating plant community response to sea level rise and anthropogenic drying: Can life stage and competitive ability be used as indicators in guiding conservation actions?" FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2558.

Full text

Abstract:

Increasing sea levels and anthropogenic disturbances have caused the world’s coastal vegetation to decline 25-50% in the past 50 years. Future sea level rise (SLR) rates are expected to increase, further threatening coastal habitats. In combination with SLR, the Everglades ecosystem has undergone large-scale drainage and restoration changing Florida’s coastal vegetation. Everglades National Park (ENP) has 21 coastal plant species threatened by SLR. My dissertation focuses on three aspects of coastal plant community change related to SLR and dehydration. 1) I assessed the extent and direction c

APA, Harvard, Vancouver, ISO, and other styles

19

Park-Dwyer, Sarah Evelyn. "Modelling competition in two-species mixtures." Thesis, University of East Anglia, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323340.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Janse, Van Vuuren Adriaan. "Niche Occupation in Biological Species Competition." Thesis, Stellenbosch : University of Stellenbosch, 2008. http://hdl.handle.net/10019.1/2932.

Full text

Abstract:

Thesis (MSc (Logistics))--University of Stellenbosch, 2008.<br>The primary question considered in this study is whether a small population of a biological species introduced into a resource-heterogeneous environment, where it competes for these resources with an already established native species, will be able to invade successfully. A two-component autonomous system of reaction-diffusion equations with spatially inhomogeneous Lotka-Volterra competitive reaction terms and diffusion coefficients is derived as the governing equations of the competitive scenario. The model parameters for wh

APA, Harvard, Vancouver, ISO, and other styles

21

Janse, van Vuuren Adriaan. "Niche occupation in biological species competition /." Link to the online version, 2008. http://hdl.handle.net/10019/753.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Celiker, Hasan. "Competition between species can drive public-goods cooperation within a species." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70790.

Full text

Abstract:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 40-43).<br>Costly cooperative strategies are vulnerable to exploitation by cheats. Microbial studies have suggested that cooperation can be maintained in nature by mechanisms such as reciprocity, spatial structure and multi-level selection. So far, however, almost all laboratory experiments aimed at understanding cooperation have relied on studying a single species in isolation. In contrast, species

APA, Harvard, Vancouver, ISO, and other styles

23

Carlsson, Linnéa. "Stable Coexistence of Three Species in Competition." Thesis, Linköping University, Department of Mathematics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18807.

Full text

Abstract:

<p>This report consider a system describing three competing species with populations <em>x</em>, <em>y</em> and <em>z</em>. Sufficient conditions for every positive equilibrium to be asymptotically stable have been found. First it is shown that conditions on the pairwise competitive interaction between the populations are needed. Actually, these conditions are equivalent to asymptotic stability for any two-dimensional competing system of the three species. It is also shown that these alone are not enough, and that a condition on the competitive interaction between all three populations is also

APA, Harvard, Vancouver, ISO, and other styles

24

Rasheed, Shaker M. "A reaction-diffusion model for inter-species competition and intra-species cooperation." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13545/.

Full text

Abstract:

This thesis deals with a two component reaction-diffusion system (RDS) for competing and cooperating species. We have analyse in detail the stability and bifurcation structure of equilibrium solutions of this system, a natural extension of the Lotka-Volterra system. We find seven topologically different regions separated by bifurcation boundaries depending on the number and stability of equilibrium solutions, with four regions in which the solutions are similar to those in the Lotka-Volterra system. We study RDS in the small parameter of the range $0< \lambda \ll 1 $ (fast diffusion and slow r

APA, Harvard, Vancouver, ISO, and other styles

25

Nguyen, Tung Shen Wenxian Hetzer Georg. "A-stability for two species competition diffusion systems." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Dissertations/NGUYEN_TUNG_28.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Fisher, E. M. "Competition for food in the Bryozoa." Thesis, University of Liverpool, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279719.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Idjadi, Joshua Aziz. "Aggregation promotes species coexistence among reef-building corals." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 96 p, 2008. http://proquest.umi.com/pqdweb?did=1609283431&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Van, der Hoff Q., JC Greeff, and TH Fay. "Defining a stability boundary for three species competition models." Elsevier, 2008. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001763.

Full text

Abstract:

a b s t r a c t A periodic steady state is a familiar phenomenon in many areas of theoretical biology and provides a satisfying explanation for those animal communities in which populations are observed to oscillate in a reproducible periodic manner. In this paper we explore models of three competing species described by symmetric and asymmetric May–Leonard models, and specifically investigate criteria for the existence of periodic steady states for an adapted May–Leonard model: x˙ = r(1 − x − ˛y − ˇz)x y˙ = (1 − ˇx − y − ˛z)y z˙ = (1 − ˛x − ˇy − z)z. Using the Routh–Hurwitz conditions, six in

APA, Harvard, Vancouver, ISO, and other styles

29

Flower, Tom P. (Thomas Patrick). "Competition for food in meerkats (Suricata suricatta)." Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/25367.

Full text

Abstract:

In group living species animals commonly compete for limited resources such as food (Darwin 1859). Winning competition for food may be beneficial for an individuals survival or reproductive success (Williams 1966; Clutton-Brock 1988; Metcalfe et al 1995) but conflict with group members may be costly as it typically involves aggression (Huntingford&Turner 1987, Mesterton-Gibbons&Adams 1998). Asymmetries between individuals are predicted to determine the outcome of competition (Maynard-Smith&Parker 1976), and individuals are expected to steal food when the benefit to them is greatest (Barnard 19

APA, Harvard, Vancouver, ISO, and other styles

30

Fay, TH, and JC Greeff. "A three species competition model as a decision support tool." Elsevier, 2007. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000167.

Full text

Abstract:

An overcrowding problem of nyala, and lately also of impala in the Ndumo Game Reserve, South Africa, has been detrimental to other species and vegetation structures over a period of two decades. In the present study a deterministic model for three competing species (where two species tend to be overpopulated while the third faces probable localized extinction) is constructed, while future trends coupled with their coexistence are projected. On a mathematical basis, we seek reasons for the failure of the cropping strategies implemented by management over the last two decades, and suggest altern

APA, Harvard, Vancouver, ISO, and other styles

31

Bezuglyy, Andriy. "Reaction-diffusion-advection models for single and multiple species." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1253646281.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Minor, Rebecca. "Competition for Conifer Cones as a Potential Mechanism of Endangerment for the Mount Graham Red Squirrel." Thesis, The University of Arizona, 2010. http://hdl.handle.net/10150/193441.

Full text

Abstract:

Non-native species are a major cause of endangerment for native species, but the mechanisms are often unclear. As species invasions continue to rise, it is important to understand how to mitigate this threat. Our field experiment quantified the impact of introduced Abert's squirrels (Sciurus aberti) on rates of food removal within the range of the critically endangered Mount Graham red squirrel (Tamiasciurus hudsonicus grahamensis). In the presence of Abert's squirrels, the time until 50% of cones were removed was 5.55 days faster than when Abert's squirrels were excluded (95% confidence in

APA, Harvard, Vancouver, ISO, and other styles

33

Tillett, David McIlvain. "Lipid productivity and species competition in laboratory models of algal mass cultures." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/10274.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Mills, Catherine. "Competition between specialist and generalist species in computational and experimental model ecosystems." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/25502.

Full text

Abstract:

An ecological community is complex and the mechanisms behind the assembly of such a community are still poorly understood. Here, we concentrate on the question of what mechanisms affect the proportion of specialists and the proportion of generalists in a community. First, we use an individual-based model to explore the effects of the available resource spectrum on the specialist-generalist balance in well-mixed and spatially structured environments. In the well-mixed model, we uncover a new mechanism which we term `resource spectrum engineering', in which opportunistic specialists occupying sm

APA, Harvard, Vancouver, ISO, and other styles

35

Derbridge, Jonathan, and Jonathan Derbridge. "Ecology and Conservation of Endangered Territorial Species Under Invasion." Diss., The University of Arizona, 2018. http://hdl.handle.net/10150/626655.

Full text

Abstract:

Biological invasions threaten biodiversity globally, and degraded ecosystems increase the potential for invaders to compete with threatened native populations. In natural systems, niche partitioning minimizes interspecific competition, but introduced species may alter expected outcomes by competing with ecologically similar species for scarce resources. Where food production is highly variable, coexistence of native and invasive competitors may depend on dietary niche flexibility. Territorial species under invasion face additional challenges to maintain economically defendable territories.

APA, Harvard, Vancouver, ISO, and other styles

36

Abdollahian-Noghabi, Mohammad. "Ecophysiology of sugar beet cultivars and weed species subjected to water deficiency stress." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299308.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Buyukates, Yesim. "Characterization of the plankton community in the lower Rincon Delta: Investigations regarding new approaches to management." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/1312.

Full text

Abstract:

In light of increasing harmful algal blooms and the need to protect human health and aquatic resources, proactive management approaches merit further study. For this purpose I conducted field samplings to characterize plankton community composition and laboratory experiments to test some approaches to new management schemes in the lower Rincon Delta. On site measurements and microscopic analysis showed that environmental parameters and plankton community composition varied considerably among sampling stations and sampling dates. A recent modeling study suggested that manipulation of freshwater

APA, Harvard, Vancouver, ISO, and other styles

38

Alvarez, Aguirre Maria Guadalupe. "Effects of interspecific competition and herbivory on an exotic species, Senecio inaequidens DC." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498646.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Harrison, Emma Clare. "The Pararge species of Madeira : an examination of the role of interspecific competition." Thesis, Manchester Metropolitan University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343456.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Bliss, Kristin Mays. "Impact of nutrient heterogeneity on plant response and competition in Coastal plain species." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/29755.

Full text

Abstract:

Relationships between nutrient heterogeneity, root foraging behavior and short-term competitive interactions were investigated for six species native to southeastern USA. Monoculture, two- and six-species garden plots were established and fertilized to create spatially homogeneous or heterogeneous nutrient conditions. After 3.5 months, root proliferation in rich patches (precision) and aboveground biomass response to heterogeneity were assessed in monocultures, and competitive outcomes (aboveground biomass) were determined from mixed-species plots. In monoculture plots, two species were rel

APA, Harvard, Vancouver, ISO, and other styles

41

Averill, Isabel E. "The Effect of Intermediate Advection on Two Competing Species." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1324056383.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Costa, Zacharia. "SPECIES LEVEL DIFFERENCES IN THE ECOLOGY OF TWO NEOTROPICAL TADPOLE SPECIES: RESPONSES TO NONLETHAL PREDATORS AND THE ROLES OF COMPETITION AND RESOURCE USE." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2635.

Full text

Abstract:

Closely related species at the same trophic level are often considered to be ecologically equivalent. However, it is clear that individuals species can have unique functional roles that drive community and ecosystem processes. In this study we examine the growth responses of two Neotropical hylid tadpole species, Agalychnis callidryas and Dendropsophus ebraccatus, to intraspecific and interspecific competition. We also look at density-dependent effects of each on phytoplankton, periphyton and zooplankton, as well as their responses to a caged dragonfly predator through ontogeny. Intraspe

APA, Harvard, Vancouver, ISO, and other styles

43

Brunkalla, Roberta Joann. "Influence of Mixing and Buoyancy on Competition Between Cyanobacteria Species in Upper Klamath Lake." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3998.

Full text

Abstract:

Cyanobacterial blooms in lakes impact human health, the economy, and ecosystem health. It is predicted that climate change will promote and increase the frequency and intensity of cyanobacterial blooms due to unique physiological adaptions that allow cyanobacteria to exploit warm stable water bodies. Key cyanobacteria physiological adaptions include nitrogen fixation, buoyancy regulation and higher optimum growth temperatures. The largest uncertainty of predicting the effect of climate change is in understanding how the interactions among species will change. Adding to the ambiguity, cyanobact

APA, Harvard, Vancouver, ISO, and other styles

44

Forsman, J. (Jukka). "Heterospecific attraction in breeding bird communities:implications to habitat selection and species interactions in a landscape perspective." Doctoral thesis, Oulun yliopisto, 2000. http://urn.fi/urn:isbn:9514256263.

Full text

Abstract:

Abstract I studied the structure of European breeding forest bird communities on several spatial scales focusing on heterospecific attraction among birds (i.e., the attraction of individuals to the company of interspecifics). Namely, I examined how heterospecific attraction affects habitat selection in migrant birds and the potential role of predation risk in enhancing heterospecific attraction during breeding with particular emphasis regarding the interaction between resident and migrant birds. Geographically, low densities and low relative proportions of resident titmice (Parus and Aegithal

APA, Harvard, Vancouver, ISO, and other styles

45

Schwartz, Lauren Michele. "A comparative study of the population dynamics of four Amaranthaceae species." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/dissertations/1087.

Full text

Abstract:

Some of the most problematic agricultural weeds found in the Midwest United States are found in the Amaranthaceae family, such as Amaranthus palmeri and A. tuberculatus. These summer annual weeds are troublesome due to their competitive ability, high seed production, and resistance to herbicides from several modes of action which complicates management in field crops and has led to significant yield loss. Achyranthes japonica and Iresine rhizomatosa are two perennial species in the same family as A. palmeri and A. tuberculatus that occur in similar habitats as one another, but differ in invasi

APA, Harvard, Vancouver, ISO, and other styles

46

Costa, Sofia Conde. "Antagonistic interactions between dominant invasive and native ant species in citrus orchards." Master's thesis, ISA, 2017. http://hdl.handle.net/10400.5/14836.

Full text

Abstract:

Mestrado em Engenharia Agronómica - Proteção das plantas / Instituto Superior de Agronomia<br>The Argentine ant, Linepithema humile (Mayr) established in the South of Portugal (Algarve), about 120 years ago. Zina et al. (2017) compared the composition of ant communities foraging in tree canopy in citrus orchards among the three ecological subregions of Algarve (Litoral, Barrocal and Serra) and observed that the invasive dominant species L. humile was absent from Serra. In this work, we tested the hypothesis that dominant native ant species, such as Tapinoma nigerrimum (Nylander) and Lasius gra

APA, Harvard, Vancouver, ISO, and other styles

47

Story, Heather Marie. "Assessing performance and compatibility of three Laricobius species as predators of hemlock woolly adelgid, Adelges tsugae." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/42362.

Full text

Abstract:

Predation, egg production and survivorship of Laricobius nigrinus Fender, L. rubidus, LeConte, and L. osakensis Montgomery and Shiyaki (proposed), predators of hemlock woolly adelgid, Adelges tsugae, Annand, were investigated in the laboratory and in the field. In individual assays, L. rubidus oviposited fewer eggs than either L. nigrinus or L. osakensis. In assays containing congeneric or conspecific groups of adult Laricobius, L. osakensis preyed upon the greatest number of ovisacs. When all three species were together, the numbers of ovisacs preyed upon were similar to the mean of all th

APA, Harvard, Vancouver, ISO, and other styles

48

Van, Acker Rene C. "Multiple-weed species interference in broadleaved crops : evaluation of yield loss prediction and competition models." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308562.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Zarochentseva, O. "Adaptation of methodology calculation relative crowding coefficient for evaluation competition of tree species in polyculture." Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/26816.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Everard, Katherine Anne. "Soil Moisture as a Mediator for Nitrogen Competition : Implications for Species Invasion and Climate Change." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/4651.

Full text

Abstract:

Simple models of competition for one and two resources have been wellinvestigated for both nitrogen and water. Ecosystem models of nitrogen andwater, including their interactions are also well known, but competition andecosystem processes have rarely been considered together. Using a simpleecosystem model of the nitrogen and water cycles including the dependenceof the nitrogen cycle on soil moisture I examine the outcome of competitionfor nitrogen. This model shows that when there are species specific effectson soil moisture, the competitive outcome for nitrogen can be coexistenceor alternativ

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!