2 edition of Studies of inter-species competition in grassland swards. found in the catalog.
Studies of inter-species competition in grassland swards.
David Moore Boyd Chestnutt
Written in English
Thesis (Ph. D.)--The Queen"s University of Belfast, 1969.
|The Physical Object|
An understanding of these will help to improve swards both in view of the conservation of an intact vegetation cover, and for fostering animal welfare. In the present field study, we investigated: (1) the growth of a number of grassland plant species under conditions of. Competition. Consumptive competition occurs when organisms compete for the same resources. Species Interactions in a Successional Grassland. I. Seed Rain and Abuse. L21 - Plants and Animal gtbabowling.com - Missouri Botanical Garden In this class we will examine the types of inter-species interactions that can this exercise. A-Level Nutrition & Food Science pupils from Bloomfield Collegiate, Methodist College and St. Paul’s High School, Bessbrook, enjoying the best bit of learning about ice cream manufacture as part of this year’s NI Science Festival at week long events held at CAFRE, Loughry Campus, Cookstown. In the natural course of events, species become extinct for a number of reasons, including but not limited to: extinction of a necessary host, prey or pollinator, inter-species competition, inability to deal with evolving diseases and changing environmental conditions (particularly sudden changes) which can act to introduce novel predators, or Data Deficient (DD)Not Evaluated (NE): (list).
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Black JN () Competition between plants of different initial seed sizes in swards of subterranean clover (Trifolium subterraneum L.) with particular reference to leaf area and the light microclimate, Aust.
Agric. Res. 9, –Cited by: The focus is on field experiments that examine the role of competition and variation in competitive ability along gradients of stress in natural temperate grasslands. These include mid-latitude arid and alpine grasslands but not tropical grasslands or savannas or Arctic graminoid communities.
In this book, leading experts offer the first survey of applications of stable isotope analysis to ecological research. Central topics are - plant physiology studies - food webs and animal. The vertical structure is an important feature of mixed swards, as it influences the inter-species competition for light, as well as the patterns of grazing.
The concept of a root gap has been explored in forests where root gaps were thought to be a consequence of canopy gaps (Ostertag, ). In grassy biomes, root gaps may have no association with canopy conditions, whether of grass or trees (Jurena and Archer, ; this study).Cited by: The ideal grassland to encourage plants and invertebrates suitable as food for farmland birds contains a mixture of grasses and broad-leaved plants with a range of vegetation heights and structures.
However, as a result of agricultural intensification the majority of lowland grasslands in the UK now lack botanical and structural gtbabowling.com by: In these swards types the assessment of BM can be conducted by measuring sward height with an ultrasonic distance sensor (Fricke et al., ).
Hereafter, crop height measured with an ultrasonic sensor is referred to ultrasonic sward height (USH). The magnitude of simulated annual DM yields in both pure and mixed swards was in the range reported in previous studies (Frame and Newbould,Frame and Paterson,Schils et al.,Elgersma et al.,Lantinga et al., ).
Both sward types showed an almost linear relationship between N application rate and N yield except for pure grass swards under the lowest cutting Cited by: However, studies on mixture effects in cultivated grassland swards mainly focussed on symbiotic nitrogen fixation (Nyfeler et al.,Suter et al., ).
It thus remains unclear if cultivated mixed swards benefit from the association of species with different aboveground gtbabowling.com by: The large differences in the responses to CO 2 between N 2-fixing and N 2-nonfixing perennial grassland species found in both competition treatments confirm the results of various authors and their co-workers— Overdieck et al.
(), Hardacre et al. (), Nijs et al. (a, b), and Newton et al. () —all of whom used T. repens and L. perenne.
Case studies on grassland and rangeland management Grassland carbon sequestration: management, policy and economics This book profiles 13 contributions by some of the world’s best scientists on the subjects of measuring soil C in grassland systems and sustainable grassland management practices.
Jul 25, · Recent studies provide evidence for direct interference and food competition between Brown Hares and Brent Geese during spring (Van der Wal et al. a), as well as for indirect, long‐term facilitation by hares Studies of inter-species competition in grassland swards. book Brent Geese through selective removal of woody plant material in winter (Van der Wal et al.
In this study we focus both Cited by: Summary. Four species of grassland plant, Plantago lanceolata, Holcus lanatus, Lolium perenne and Rumex acetosa, were grown as monocultures and mixtures in pots of nutrient poor soil in a glasshouse for 8 gtbabowling.com were four plants per pot and these were arranged in two competition modes: either root and shoot interactions were permitted, or only roots allowed to interact by using above Cited by: Visit gtbabowling.com to get more information about this book, to buy it in print, or to download it as a free PDF.
Grasslands and Grassland Sciences in Northern China is a report produced by the Committee on Scholarly Communication with the People's Republic of China (CSCPRC) under contract with the. A 6-year study from compared seasonal and annual DM production of Yatsyn-1 perennialryegrass sown at 15kg/ha with Roa tall fescue at 25 kg/ha, Maru phalaris at 12 kg/ha and Kara cocksfoot at 8 kg/ha as pure swards and as two and three grass species mixes (Table 1).
To minimise inter-species competition, all. In the last few decades, much progress has been made in the study of the California grassland invasion by Mediterranean grasses.
Several studies suggest that native perennial bunchgrasses, thought to be abundant in pre-invasion grasslands, are not inferior competitors to Mediterranean annual grasses but are often less tolerant of disturbance Cited by: The majority of roots under permanent grassland swards are located near the surface, which is the zone of the highest microbial activity (Deinum, ).
Large amounts of fine root biomass in this shallow layer and favorable conditions for mineralization foster the turnover of roots, which forms an important part in the nutrient cycling of Author: Manfred Kayser, Manfred Kayser, Jürgen Müller, Johannes Isselstein.
Explore University of Nebraska-Lincoln research, education, and service programs that emphasize the role of grasslands as a natural resource and enhance the efficiency, profitability, and sustainability of grasslands and turfs. Title Browse > Proceeding： Proceedings of the XXI International Grassland Congress and the VIII International Rangeland Congress(volumeⅠ) Proceedings of the XXI International Grassland Congress and the VIII International Rangeland Congress(volumeⅠ) Description.
Dynamic study on inter-species competition in mix-sowing community of. In conclusion, this research is one of the few studies that has demonstrated differing degrees of photosynthetic acclimation in species growing in competition, under natural conditions of limited nutrient availability, in a long‐term CO 2 ‐enrichment experiment.
It is likely that these differences contribute, albeit indirectly, to the Cited by: Grassland management in Germany: Effects on plant diversity and vegetation composition.
of associated factors potentially affecting the structure and diversity of grasslands. In this study, we. Subplot treatments consisted of three grassland mixtures (3-species, species or species mixtures).
The 3-species mixture (3-mix) was composed of ryegrass, red clover and white clover, the species mixtures (mix) had a further seven leguminous and non-leguminous forbs and the species mixtures (mix) Cited by: A change from grazing to cutting on intensive managed grasslands has increased the interest for other grassland species than perennial ryegrass (Lolium perenne) and white clover (Trifolium repens).
Lucerne (Medicago sativa), red clover (Trifolium pratense) and festulolium (XFestulolium) were therefore, together with perennial ryegrass and white clover, analysed for competitiveness and herbage Cited by: 9. Grant S.A., Torvell L., Common T.G., Sim E.M.
& Small J.L. () Controlled grazing studies on Molinia grassland: Effects of different seasonal patterns and levels of defoliation on Molinia growth and responses of swards to controlled grazing by gtbabowling.coml of Applied Ecology, 33, Summary. Purple moor-grass Molinia caerulea is a tussock-forming perennial grass typically found on.
Competition and Predation relationships can be always found in any ecosystem. These types of relationships usually involves two organisms (Predator vs Prey or Predator vs Predator). There are many predation and competition relationships in temperate and tropical grasslands.
These interactions can be either harmful or beneficial to an organism. Interspecific differences in the response to e[CO 2] were stronger in the mixed sward (−2 % for L. perenne and +65 % for T. repens) than in the pure swards (+13 % for L. perenne and +19 % for T. repens), demonstrating that e[CO 2] does affect not only the yield, but also the interspecific interactions and the species composition of mixed plant gtbabowling.com by: The Grassland Review Panel appointed by the National Academy of Sciences to review this study concluded that the best way to understand the current state of grassland science in China is to let Chinese scientists speak for themselves—through their published research, their work in situ, and their descriptions of both.
A field experiment in a native grassland in Central Alberta, Canada, tested whether plants alter relative allocation to roots vs.
shoots in response to below‐ground competition, and whether the mass of a species’ root system accounts for interspecific differences in below‐ground competitive gtbabowling.com by: Dec 01, · This book describes how competition between plant species, and succession in plant ecosystems, operate in grasslands and grazed pastures, both natural and sown.
It discusses how competition both affects botanical structure, productivity and persistence of pastures and is itself regulated by biological, environmental and management factors, such as grazing animals. Today's guest blog comes courtesy of Robyn Stewart, Glasgow's Water Vole Ambassador.
The discovery of thriving populations of water voles in a residential area of Glasgow away from traditional habitat is considered to be of national significance.
SNH are supporting Glasgow City Council and the University of Glasgow, who are working in the local community, to help conserve. Apr 05, · Growth, morphology and biological nitrogen fixation potential of perennial ryegrass-white clover swards throughout the grazing season - Volume Issue 2 - C.
Guy, D. Hennessy, T. Gilliland, F. Coughlan, B. McCarthyCited by: 4. Online publicatioNs database Online access to 75 years of technical papers published by the Association.
Jun 02, · To the best of our knowledge, no study has investigated the effects of P fertilization on P forms in grassland soils in eastern Canada.
Thus, the objective of this study was to assess the P forms in two grassland soils with differing soil properties, using 31 P-NMR, after 4 yr of fertilization with mineral P at different gtbabowling.com by: 2.
In the current study, we investigated the effect of different plant species on numbers of ammonia-oxidizing microbial cells by measuring the potential nitrification activity (PAA).
Soil from matgrass sward and from calcareous grassland was collected in the field and four characteristic plant species of each vegetation type were cultivated from Cited by: Part of the Ecological Studies book series (ECOLSTUD Black, J.
Competition between plants of different initial seed sizes in swards of J.A., French N.R., Leetham J.W. () Patterns of Consumption in Grasslands. In: French N.R. (eds) Perspectives in Grassland Ecology. Ecological Studies (Analysis and Synthesis), vol Cited by: Dec 21, · A number of correlative studies have suggested that increases in the intensity of grassland management in Britain may affect bird populations.
An examination of changes in the spatial ranges of 21 farmland birds in Britain between the s and s revealed the greatest species loss in mainly pastoral 10‐km squares in the west of the gtbabowling.com by: This study evaluated the effect of these two factors on plant productivity, and abundance of soil microorganisms and functional diversity, in an establishing pasture using sward complexity (plant species present) and sward composition (identity of species) as treatments in a design using the step-wise addition of grass gtbabowling.com by: 6.
The objective of this study was to evaluate alternative methods of grassland renewal (reseeding) with perennial ryegrass and quantify their effects on subsequent DM yield, tiller density and nitrate leaching.
Two experiments were carried out; the first focused on quantifying the influence of Autumn reseeding (August cultivation), and the second, on Spring reseeding (May cultivation) on sward Cited by: 4. This study and that of Thórhallsdóttir () observed large differences between species, which were too large to be consistent with the competitive equivalence hypothesis, but Turkington () suggested that his observations might be consistent with evolution towards competitive equivalence as swards aged.
Site differences and defoliation Cited by: 8. The winners of the UGS Grassland Farmer of the Year Competition were announced at the 61 st Annual Conference on 21 st January An important feature of the Annual Conference is the presentation of awards in the Society’s Grassland Farmer of the Year competition which was again generously sponsored by Danske Bank.
Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit gtbabowling.com to get more information about this book, to buy it in print, or to download it as a free PDF.Book: Persistence of Forage Legumes, Published by: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America as it is the most important legume in grassland farming in New Zealand.
Grazing management strategies exist which increase both white and red clover content in swards, and genotype.Apr 16, · European grassland-based livestock production systems face the challenge of producing more meat and milk to meet increasing world demands and to achieve this using fewer resources.
Legumes offer great potential for achieving these objectives. They have Cited by: