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Articles 1 - 19 of 19
Full-Text Articles in Life Sciences
The Effects Of Grazing Management And Fertilization On Grassland Diversity And Productivity, Warren Mcg. King, David R. Kemp
The Effects Of Grazing Management And Fertilization On Grassland Diversity And Productivity, Warren Mcg. King, David R. Kemp
IGC Proceedings (1997-2023)
The effects of management practices on plant species diversity and productivity within a naturalised grassland was studied as part of a large-scale experiment designed to investigate issues of sustainability in temperate Australia. Fertiliser increased the production but reduced the diversity of the sward. The main decline was in exotic weed species. Strategic grazing resulted in a small increase in pasture diversity but a reduction in productivity. There was a consistent decline in diversity as productivity increased, across all treatments.
Pasture Dynamics After Sodseeding Cool Season Species With Or Without Glyphosate In Subtropical Natural Grasslands, Luciana M. Rizo, E. L. Moojen, Fernando L. F. De Quadros, F. E. Schlick, F. L. Correa
Pasture Dynamics After Sodseeding Cool Season Species With Or Without Glyphosate In Subtropical Natural Grasslands, Luciana M. Rizo, E. L. Moojen, Fernando L. F. De Quadros, F. E. Schlick, F. L. Correa
IGC Proceedings (1997-2023)
This trial was conducted to evaluate vegetation dynamics of natural grasslands fertilized and sodseeded with the cool season species Italian ryegrass (Lolium multiflorum), white clover (Trifolium repens) and birdsfoot trefoil (Lotus corniculatus) with or without glyphosate. Treatments that included herbicide spraying on natural vegetation caused a substitution of perennial grasses by undesirable species, and did not show a significant contribution of introduced species. Andropogon lateralis, Paspalum notatum, Paspalum dilatatum and Paspalum plicatulum almost disappeared, and were replaced by Chaptalia nutans and Apium spp, among others.
Core Collection Approaches And Genetic Diversity In Flemingia Macrophylla, R. Schultze‐Kraft, M. Peters
Core Collection Approaches And Genetic Diversity In Flemingia Macrophylla, R. Schultze‐Kraft, M. Peters
IGC Proceedings (1997-2023)
Core collections are a useful means to optimise the management, including conservation, of forage germplasm collections. Such optimisation is warranted in view of increasingly limited research resources. As there are several potential options to create core collections, a project is presented in which three approaches are compared: (i) based on germplasm origin information; (ii) genetic diversity assessment by agronomic characterisation/evaluation; and (iii) DNA markers. As example-species for the project, the tropical legume shrub Flemingia macrophylla is selected because of its particular multiple-use potential in smallholder production systems. An important diversity descriptor is the content of tannins influencing feed and litter …
Managing Grassy Woodlands: Balancing Production And Conservation Of Resources, John G. Mcivor, Neil D. Macleod, S. Mcintyre
Managing Grassy Woodlands: Balancing Production And Conservation Of Resources, John G. Mcivor, Neil D. Macleod, S. Mcintyre
IGC Proceedings (1997-2023)
Eastern Australian eucalypt woodlands are important agricultural areas that have been widely modified during two centuries of European-style use. Despite this they contain important natural resources including significant biodiversity. Long term sustainability of production depends on maintaining resources and management must be for both production and conservation. A research program on four properties in south east Queensland showed the properties were in generally good condition although all had some problems, and has highlighted a number of significant costs and barriers to adopting a more balanced approach to production and conservation.
Biodiversity And Fire In Shortgrass Steppe, Paulette L. Ford
Biodiversity And Fire In Shortgrass Steppe, Paulette L. Ford
IGC Proceedings (1997-2023)
Effects of fire at two levels of intensity on beetle diversity in shortgrass steppe were examined. The experimental design was completely randomized, with 3 treatments and 4 replicates per treatment. Treatments were two levels of fire 1) dormant-season fire (relatively hot), and 2) growing-season fire (relatively cool), and unburned plots. The response variables were arthropod species richness and abundance. The intermediate disturbance hypothesis predicts that maximum species richness occurs at intermediate levels of disturbance. Data obtained in this study support that prediction. Species richness was higher on plots of intermediate fire intensity than the more intensely burned plots, and almost …
Tropical Forage Genetic Resources -- Will Any Be Left For Future Generations?, B. L. Maass, B. C. Pengelly
Tropical Forage Genetic Resources -- Will Any Be Left For Future Generations?, B. L. Maass, B. C. Pengelly
IGC Proceedings (1997-2023)
After very active years of pasture and forage research at major institutes, interest in tropical forage genetic resources has drastically declined. Apparently, the early phases of collecting and evaluation were much more valued than conserving and keeping the germplasm available for future generations. Accumulated data are not easily accessible and, therefore, the knowledge of tropical forage genetic resources is progressively being lost. This worldwide decrease in activity and loss of knowledge is due to declining resources. It is suggested that a global database on tropical forage genetic resources should be established and also that finances be made available to at …
A Systematic Review Of Ecological And Production Outcomes Under Rest-Grazing Systems, S. E. Mcdonald, R. Lawrence, R. Rader
A Systematic Review Of Ecological And Production Outcomes Under Rest-Grazing Systems, S. E. Mcdonald, R. Lawrence, R. Rader
IGC Proceedings (1997-2023)
With increasing pressure on grazing lands throughout the world, there is a growing need to balance sustainable management of livestock to meet food production and environmental impacts. Grazing management practices that incorporate periods of planned rest between grazing events (RG) may achieve both ecological and production goals simultaneously. We conducted a systematic review of global literature that compared ecological and production outcomes of RG systems with either continuously grazed (CG) or ungrazed (UG) areas. In addition, we evaluated the extent to which ecological and livestock production outcomes have been assessed simultaneously in these studies and identified future research needs. A …
Counteracting Green Alder Shrub Expansion By Low-Input Grazing, M. K. Schneider, T. Zehnder, J. Berard, C. Pauler, M. Staudinger, Michael Kreuzer, A. Lüscher
Counteracting Green Alder Shrub Expansion By Low-Input Grazing, M. K. Schneider, T. Zehnder, J. Berard, C. Pauler, M. Staudinger, Michael Kreuzer, A. Lüscher
IGC Proceedings (1997-2023)
In the past decades, the decline of traditional agriculture has caused an abandonment of marginal pastures in many mountain areas of Europe. In the Swiss Alps, green alder (Alnus viridis) is the most abundant successional shrub. A survey of 24 pasture-shrub gradients showed that the encroachment by green alder, in contrast to other shrubs, is associated with a substantial decline in plant species richness. The understorey of alder is primarily populated by very few, broad-leaved herbaceous species benefitting from the atmospheric nitrogen fixed by actinomycetes in symbiosis with green alder. However, the understory vegetation also provides an underestimated …
Pasture Management For Conservation Of Multipurpose Plants In Italian Mountains, Andrea Pardini, V. Pratesi, R. Tallarico
Pasture Management For Conservation Of Multipurpose Plants In Italian Mountains, Andrea Pardini, V. Pratesi, R. Tallarico
IGC Proceedings (1997-2023)
No abstract provided.
Assessing The Contribution Of Mixed Farming Systems To Biodiversity Across Australia's Sheep‐Wheat Zone: The Grain & Graze Participatory Research Model, Kerry L. Bridle, Peter Mcquillan, Dave Green, Janet Smith, Margy Fitzgerald, Ted Lefroy
Assessing The Contribution Of Mixed Farming Systems To Biodiversity Across Australia's Sheep‐Wheat Zone: The Grain & Graze Participatory Research Model, Kerry L. Bridle, Peter Mcquillan, Dave Green, Janet Smith, Margy Fitzgerald, Ted Lefroy
IGC Proceedings (1997-2023)
No abstract provided.
Too Many People, Too Many Animals For Too Little Grass-‐A Canadian Perspective, G. Luciuk, M. Boyle, G. Brown, B. Kirychuk, B. Sonntag
Too Many People, Too Many Animals For Too Little Grass-‐A Canadian Perspective, G. Luciuk, M. Boyle, G. Brown, B. Kirychuk, B. Sonntag
IGC Proceedings (1997-2023)
No abstract provided.
Biodiversity Of Plants And Animals In Grassland Systems: Approaches To Conservation And Restoration In England, S. Peel, S. P. Chaplin
Biodiversity Of Plants And Animals In Grassland Systems: Approaches To Conservation And Restoration In England, S. Peel, S. P. Chaplin
IGC Proceedings (1997-2023)
No abstract provided.
Commercial Grazing Versus Peri‐Urbanisation: Comparisons Of Landscape Condition, Cam K. Mcdonald, Neil D. Macleod, John G. Mcivor, F. Kearney
Commercial Grazing Versus Peri‐Urbanisation: Comparisons Of Landscape Condition, Cam K. Mcdonald, Neil D. Macleod, John G. Mcivor, F. Kearney
IGC Proceedings (1997-2023)
No abstract provided.
Inheriting And Advancing The Essence Of Nomadic Culture, And Searching For A New Course Of Harmonious Development On The Grassland, Zhongling Liu, Cunzhu Liang, Lixing Wang, Dunyuan Hao, Huaming Liu
Inheriting And Advancing The Essence Of Nomadic Culture, And Searching For A New Course Of Harmonious Development On The Grassland, Zhongling Liu, Cunzhu Liang, Lixing Wang, Dunyuan Hao, Huaming Liu
IGC Proceedings (1997-2023)
No abstract provided.
Different Reactions Of Plants And Insect Taxa To Reduction Of Stocking Rate: A Concrete Reason To Promote Habitat Heterogeneity In Grazing Systems, Bertrand Dumont, Anne Farruggia, J.-P. Garel
Different Reactions Of Plants And Insect Taxa To Reduction Of Stocking Rate: A Concrete Reason To Promote Habitat Heterogeneity In Grazing Systems, Bertrand Dumont, Anne Farruggia, J.-P. Garel
IGC Proceedings (1997-2023)
No abstract provided.
Biochemical Aspect Of Grazing Behavior On Mediterranean Rangelands, J. Rogosic, J. Kezic
Biochemical Aspect Of Grazing Behavior On Mediterranean Rangelands, J. Rogosic, J. Kezic
IGC Proceedings (1997-2023)
No abstract provided.
Conspecific Aggression Of Invasive Crayfish, P. Clarkii, In Response To Chemical Cues, Elyse Vetter, Elise Dearment, Audrey Fontes, Gary Bucciarelli, Lee Kats
Conspecific Aggression Of Invasive Crayfish, P. Clarkii, In Response To Chemical Cues, Elyse Vetter, Elise Dearment, Audrey Fontes, Gary Bucciarelli, Lee Kats
Seaver College Research And Scholarly Achievement Symposium
Red Swamp Crayfish, Procambarus clarkii, have caused vast damage to the stream ecosystem of the Santa Monica Mountains, following their invasive introduction. Through their extensive eating habits, high levels of aggression, and responsiveness to environmental stimuli, P. clarkii have a tremendous impact on the success of native species in the Santa Monica Mountains. With exposure to chemical cues, crayfish are able to perceive threats and react accordingly. To determine the extent of such chemoreception, pairs of P. clarkii were tested in the laboratory for conspecific aggression in the presence of native newt, native frog, and conspecific alarm cues. The …
The Effects Of Symbiote Ostracods On Invasive Crayfish Behavior, Audrey Fontes, Elyse Vetter, Gary Bucciarelli, Lee Kats
The Effects Of Symbiote Ostracods On Invasive Crayfish Behavior, Audrey Fontes, Elyse Vetter, Gary Bucciarelli, Lee Kats
Seaver College Research And Scholarly Achievement Symposium
Invasive crayfish, Procambarus clarkii, are known to negatively impact the biodiversity of Santa Monica Mountain streams. Small symbiotes, ostracods, live on Procambarus clarkii in some local streams. However, their effect on the behaviour of invasive crayfish is unknown. We used an aqueous chlorobutanol solution to remove ostracods from crayfish. We paired control crayfish with those that had ostracods removed and scored aggressive interactions. Crayfish without ostracods were found to be significantly more aggressive towards crayfish with ostracods. When we compared feeding behavior, we found that crayfish without ostracods consumed food more quickly than control crayfish. We again subjected crayfish …
Evaluation Of Germplasm Of Leymus Chinensis In North Of China, Gongshe Liu, Z. P. Liu
Evaluation Of Germplasm Of Leymus Chinensis In North Of China, Gongshe Liu, Z. P. Liu
IGC Proceedings (1997-2023)
No abstract provided.