The Effect Of Common Ragweed Ambrosia Artemisiifolia On Nutrient Cycling In A First Year Old Field
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The Effect Of Common Ragweed Ambrosia Artemisiifolia On Nutrient Cycling In A First Year Old Field
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Author : Margaret Mead Foster
language : en
Publisher:
Release Date : 1977
The Effect Of Common Ragweed Ambrosia Artemisiifolia On Nutrient Cycling In A First Year Old Field written by Margaret Mead Foster and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Ragweeds categories.
The American Midland Naturalist
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Author :
language : en
Publisher:
Release Date : 1980
The American Midland Naturalist written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Electronic journals categories.
A refereed, broad-spectrum journal publishing basic research in diverse disciplines in biology and varied taxa.
The Ecosystem Approach
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Author : T. F. H. Allen
language : en
Publisher:
Release Date : 1993
The Ecosystem Approach written by T. F. H. Allen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Biodiversity conservation categories.
Effect Of Heavy Metals On Establishment Of Common Ragweed Ambrosia Artemisiifolia L And Ground Cover Legumes In Roadside Edges
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Author : Jichul Bae
language : en
Publisher:
Release Date : 2015
Effect Of Heavy Metals On Establishment Of Common Ragweed Ambrosia Artemisiifolia L And Ground Cover Legumes In Roadside Edges written by Jichul Bae and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
"Poor establishment of supplement ground cover (i.e. Trifolium species) has led to unsuccessful turf-recruitment and creating empty niches near pavement edges of major roadways and highways in southern Québec, Canada. The resulting empty niches are frequently occupied by dense monocultures of Ambrosia artemisiifolia. Due to its adverse impacts on agroeconomy and public health, understanding ecological cause(s) associated with A. artemisiifolia's successful establishment along roadside edges will help us to control this problematic weeds and prevent its dispersal into nearby agricultural and urban areas. Surface soils adjacent to major roads and highways commonly contain heavy metals at phytotoxic levels. We hypothesized that during early establishment stage higher metal tolerance of A. artemisiifolia compared to the current cover legume (Trifolium spp.) may cause its successful establishment along roadside edges. Growth chamber experiments investigated germination and early seedling behaviors of four test species (Ambrosia artemisiifolia, Coronilla varia, Lotus corniculatus, and Trifolium arvense) exposed to Zn, Pb, Ni, Cu, and Cd. All metal additions hindered the seedling growth of all test species, and the inhibitory effect was greater on the belowground growth than the aboveground growth. The germinability and seedling survival of T. arvense were inhibited by the studied metals, whereas those of A. artemisiifolia were tolerant to the metal additions. Low levels of Pb and Ni promoted germination initiation of A. artemisiifolia. While sensitive to Cu and Cd, the germinabilities of L. corniculatus and C. varia were tolerant to the other metals. The germinability of L. corniculatus was more tolerant of Zn, Pb, and Ni than that of C. varia. The seedling survivals of L. corniculatus and C. varia were not affected by the metal additions, except for Ni and Cu. In addition to the interspecific comparisons, germination and early seedling responses to metals (Zn, Pb, Ni, Cu, and Cd) between the agriculture and roadside populations of A. artemisiifolia were compared under laboratory condition. Germinability and early seedling behaviours of the two A. artemisiifolia populations had similar responses to heavy metal additions. However, there was population-specific difference in germination rate, suggesting that this variation might arise from different maternal environmental factors between the two source populations. A field experiment was conducted to verify the establishment potential of the test species near roadside edges along a heavy metal gradient. Seedling emergence of T. arvense was negatively correlated with Zn, Pb, and Cu concentrations, while emergence of A. artemisiifolia was positively correlated with these metal elements. Similar to A. artemisiifolia, the emergence of L. corniculatus was positively related with the metal contents, but no correlation was found for C. varia. The present research project outlines a potential mechanism that may drive the successful establishment of A. artemisiifolia along roadside edges. Based on the findings from the laboratory and field studies, A. artemisiifolia establishment along roadside edges appears to be caused by its higher metal tolerance relative to T. arvense. Because its metal tolerance and establishment potential was similar to A. artemisiifolia, L. corniculatus could be an alternative supplement ground cover for effective turf-recruitment and control of A. artemisiifolia along edges of highways in southern Québec. This study provides integrated roadside ground cover management strategy for controlling A. artemisiifolia, supporting turf-recruitment and stabilizing disturbed soil near pavement edges of high traffic roadways, which may eventually alleviate economic burdens (involving health care, roadside maintenance, and agricultural production) on society." --
Manual Of Field Biology And Ecology
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Author : Allen H. Benton
language : en
Publisher:
Release Date : 1983
Manual Of Field Biology And Ecology written by Allen H. Benton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Biology categories.
Agriculture Handbook
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Author :
language : en
Publisher:
Release Date : 1997
Agriculture Handbook written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Agriculture categories.
Set includes revised editions of some issues.
Loblolly Pine
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Author : Robert P. Schultz
language : en
Publisher: U.S. Government Printing Office
Release Date : 1997
Loblolly Pine written by Robert P. Schultz and has been published by U.S. Government Printing Office this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Nature categories.
Local Escape Of Common Ragweed Ambrosia Artemisiifolia From Above And Below Ground Natural Enemies
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Author : James MacKay
language : en
Publisher:
Release Date : 2008
Local Escape Of Common Ragweed Ambrosia Artemisiifolia From Above And Below Ground Natural Enemies written by James MacKay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
The enemy release hypothesis often is invoked to explain the success of exotic species in new geographical regions. I hypothesized that escape from natural enemies is not limited to the introduced range of a species but may operate on a local scale within the native range. I tested this using an invasive North American native plant (Ambrosia artemisiifolia) or Common Ragweed. I found evidence of enemy release from herbivorous and granivorous insects, but no effects on plant performance. The soil community had a net positive effect on the growth of ragweed regardless of habitat; however this effect attenuates over time. Ragweed seeds had higher germination rates in old fields than existing ragweed populations, but not because of fungal activity. My results demonstrate that plants can escape natural enemies in their native habitat, but this doesn't necessarily translate to increased individual plant performance.
The Annual Ragweeds Ambrosia Artemisiifolia L Ambrosia Trifida L
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Author : Lucie Meyer
language : en
Publisher:
Release Date : 2018
The Annual Ragweeds Ambrosia Artemisiifolia L Ambrosia Trifida L written by Lucie Meyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
The first aim of this work was to investigate the risk for the evolution of resistance to acetolactate synthase inhibitor (ALS) herbicides in the common ragweed (Ambrosia artemisiifolia L.) through four points: (i) the selection pressure (effectiveness of a range of ALS inhibitor herbicides), (ii) the adaptive response of Ambrosia artemisiifolia (recurrent selection experiment), (iii) a resistance monitoring in fields in France, and (iv) the investigation of the mechanisms underlying herbicide resistance (target-site (TSR) and non-target-site resistance (NTSR) using transcriptomic analyses). The second aim was to study the connectivity of A. artemisiifolia populations in agricultural landscapes using microsatellite markers developed during this work, to determine factors that could facilitate the spread of this invasive weed species and the spread of herbicide resistance.In regards to herbicide resistance:-The sensitivity of A. artemisiifolia to ALS-inhibiting herbicides is variable between active ingredients.-Plants that survived the French maximum authorized field rate and higher rates of metsulfuron were selected to implement a recurrent breeding program. After two selection cycles, the resistance level to metsulfuron increased and resistance to imazamox and tribenuron emerged.-Three cases of imazamox resistance were identified in the field, including two cases of pure NTSR and one case of TSR - NTSR coexistence.-A transcriptome for A. artemisiifolia, AMBELbase, was generated using the PacBio sequencing technology to search for genes involved in NTSR mechanisms (RNAseq approach). 62 candidate contigs were identified including ABC transporters, cytochromes P450 and glutathione S-transferases known to be involved in the degradation of herbicides.In regards to population connectivity:-26 microsatellite markers were developed and revealed high genetic variability. Genetic structuring has been studied on a large scale for populations of A. artemisiifolia from Europe (invasion range) and North America (native range).-On a finer scale (agricultural landscape), the genetic structure of populations was influenced by colonization events. Migration events detected among the areas colonized by A. artemisiifolia suggested moderate pollen/seed flows and connectivity at the farmland scale. In agricultural environments, herbicide resistant alleles could be easily spread among neighbouring populations via pollen flow, and also at longer distances via seed dispersal. Human-related activities play a major role in the dispersal of seeds (agricultural machinery, contaminated seed lots, etc.).-The mating system analysis confirmed that A. artemisiifolia is an obligate outcrossing species which leads to important intra- and inter-population gene flow.The knowledge acquired during this work may help to foster the development of better management strategies to effectively control A. artemisiifolia to limit its spread, such as:-Diversified weed control strategies: combination of mechanical (including false-seed) and chemical weeding (diversification of herbicide modes of action).-Longer diversified crop rotations including more winter crops and/or cover and competitive crops to break the life cycle of A. artemisiifolia.These knowledge may also be used to better control of another weed species of the genus Ambrosia, Ambrosia trifida L.
Abstracts Of Papers To Be Presented At The Meetings
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Author : Botanical Society of America
language : en
Publisher:
Release Date : 1981
Abstracts Of Papers To Be Presented At The Meetings written by Botanical Society of America and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Botany categories.