LTREB: Long-term Consequences of Biochemical and Biogeochemical Changes in the Horseshoe Bend Agroecosystem, Athens, GA.

LTREB:马蹄湾农业生态系统生化和生物地球化学变化的长期后果,雅典,佐治亚州。

基本信息

项目摘要

0214946ColemanUnderstanding many soil processes, including the accumulation of organic matter andthe formation of soil aggregates, requires research that is conducted over decadal timeperiods. The dynamics of soil organic matter and soil fauna at the Horseshoe Bend(HSB) agroecosystem site in Georgia have been studied in replicated experimentalplots since 1978. Analyses indicate that the experimental treatments (no-tillage andconventional-tillage regimes) are continuing to diverge. It is essential to continue theexperiments for an additional six years, to enable prediction of what the long-termconsequences of our manipulations will be. Consequently, a continuation of ongoingLTREB research on soil processes in no-till and conventional till plots at HSB is proposed, withsome significant changes. The new research focuses on two related areas:1) long-term measurements of the gradually-increasing base of soil organic matter fromC3-pathway plants, in crop rotations that have been in effect since 1997.2) following the production, accumulation, fate and ecological effects of the Bt proteinsfrom the summer planting of Bt (and non-Bt) cotton in subplots within our main plots.The relationship between these focal areas is simple. The variation in the size of soilaggregates may influence the sequestration of Bt toxins, and their breakdown products,within soils. It has already been shown that no-tillage management systems at HSBgenerate an increasing representation of soil macroaggregates in comparison to themarkedly reduced macroaggregates in our conventional tillage plots. Therefore, it ishypothesized that no-tillage systems will sequester more Bt-related products than willconventional-tillage plots.Several short-term studies (see references in Project Description) have failed to detectdeleterious changes in non-target soil fauna as a result of Bt in crop residues. Thereare three possible explanations for this: a) that no deleterious effects exist, b) that short-term experiments do not adequately predict the long-term consequences of repeatedexposure to Bt residues, and c) that effects are contingent upon properties of the soilsuch as aggregate size. It would seem prudent to be able to distinguish among thesepossibilities and the long-term plantings at HSB will allow that to occur.
0214946Coleman 要了解许多土壤过程,包括有机质的积累和土壤团聚体的形成,需要进行数十年的研究。自 1978 年以来,人们一直在重复的试验田中研究了乔治亚州马蹄湾 (HSB) 农业生态系统遗址的土壤有机质和土壤动物动态。分析表明,试验处理(免耕和常规耕作方式)继续出现分歧。有必要继续进行六年的实验,以便能够预测我们的操纵行为的长期后果。因此,建议继续开展 LTREB 对 HSB 免耕和传统耕地土壤过程的研究,并做出一些重大改变。新研究重点关注两个相关领域:1) 对自 1997 年以来实行的轮作中 C3 途径植物逐渐增加的土壤有机质基础进行长期测量。2) 跟踪生产、积累、归宿和生态夏季种植 Bt(和非 Bt)棉花对我们主区的子区中 Bt 蛋白的影响。这些重点区域之间的关系很简单。土壤团聚体大小的变化可能会影响土壤中 Bt 毒素及其分解产物的封存。已经表明,与传统耕作地块中显着减少的大团聚体相比,HSB 的免耕管理系统产生了越来越多的土壤大团聚体。因此,假设免耕系统将比传统耕作地封存更多的 Bt 相关产品。一些短期研究(参见项目描述中的参考资料)未能检测到 Bt 导致的非目标土壤动物的有害变化。在农作物残留物中。对此有三种可能的解释:a) 不存在有害影响,b) 短期实验不能充分预测重复暴露于 Bt 残留物的长期后果,c) 影响取决于土壤的特性,例如聚合尺寸。能够区分这些可能性似乎是谨慎的做法,而 HSB 的长期种植将允许这种情况发生。

项目成果

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David Coleman其他文献

Finding Meaning in All the Right Places: A Novel Measurement of Dramatic Structure in Film and Television Narratives
在所有正确的地方寻找意义:电影和电视叙事中戏剧结构的新颖测量
  • DOI:
    10.3167/proj.2013.070205
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0.7
  • 作者:
    David Coleman;Tico J Romao;Cedric Villamin;S. Sinnett;Tanya Jakobsen;A. Kingstone
  • 通讯作者:
    A. Kingstone
Factors associated with mobility outcomes in older people post-ankle fracture: an observational cohort study focussing on peripheral vessel function.
与老年人踝关节骨折后活动能力结果相关的因素:一项关注外周血管功能的观察性队列研究。
  • DOI:
    10.1016/j.injury.2012.08.042
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    2.5
  • 作者:
    D. Keene;G. James;S. Lamb;J. Walton;B. Gray;David Coleman;R. Handley;A. Handa;K. Willett
  • 通讯作者:
    K. Willett
Measurement of smoking topography during withdrawal or deprivation
戒断或戒断期间吸烟地形的测量
  • DOI:
  • 发表时间:
    1981
  • 期刊:
  • 影响因子:
    0
  • 作者:
    L. Epstein;D. Ossip;David Coleman;J. Hughes;W. Wiist
  • 通讯作者:
    W. Wiist
A Phase II study of the sterilising activities of ofloxacin, gatifloxacin and moxifloxacin in pulmonary tuberculosis.
氧氟沙星、加替沙星和莫西沙星对肺结核杀菌活性的 II 期研究。
Invasive pneumococcal disease in Australia, 2002.
澳大利亚侵袭性肺炎球菌疾病,2002 年。
  • DOI:
  • 发表时间:
    2003
  • 期刊:
  • 影响因子:
    0
  • 作者:
    P. Roche;Vicki Krause;Ross M. Andrews;Louise Carter;David Coleman;H. Cook;Megan L Counahan;Carolien Giele;Robyn Gilmore;Sharon Hart;Robyn Pugh;Geoff Hogg;Denise Murphy;Michael Watson
  • 通讯作者:
    Michael Watson

David Coleman的其他文献

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{{ truncateString('David Coleman', 18)}}的其他基金

English Literature and the Ulster Crises of the Seventeenth Century
英国文学与十七世纪的阿尔斯特危机
  • 批准号:
    AH/I001719/1
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Fellowship
Acquisition of a Cyber-Enabled 600 MHz NMR Spectrometer for Research and Teaching
采购一台支持网络的 600 MHz NMR 波谱仪用于研究和教学
  • 批准号:
    0840413
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
MRI: Acquisition of an Analytical Field Emission Scanning Electron Microscope for Research and Teaching
MRI:购买用于研究和教学的分析场发射扫描电子显微镜
  • 批准号:
    0922912
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Purchase of an 'Exact Mass' Spectrometry System
购买“精确质谱”光谱系统
  • 批准号:
    0234501
  • 财政年份:
    2003
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
International Workshop on Molecular Methods in Soil Biological and Biochemical Diversity in Terrestrial Ecosystems.
陆地生态系统土壤生物和生化多样性分子方法国际研讨会。
  • 批准号:
    0327518
  • 财政年份:
    2003
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Linking Spatial Variation of Below-Ground Faunal Assemblages with the Structure of Herbaceous Vegetation
将地下动物群落的空间变化与草本植被的结构联系起来
  • 批准号:
    9707461
  • 财政年份:
    1997
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Long-Term Studies of Disturbances as They Affect Ecological Processes in Landscapes of the Southern Appalachians
对影响南阿巴拉契亚山脉景观生态过程的干扰的长期研究
  • 批准号:
    9632854
  • 财政年份:
    1996
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Biodiversity and Decomposition in Mesic Forests: An Across-site Experimental Study of Patterns and Processes
中生森林的生物多样性和分解:模式和过程的跨地点实验研究
  • 批准号:
    9416819
  • 财政年份:
    1994
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Long-term Ecological Consequences of Field Manipulations on Soil Organic Matter Dynamics Across a Spectrum of Croplands, Old Fields, and Deciduous Forest
田间操作对农田、旧田和落叶林土壤有机质动态的长期生态后果
  • 批准号:
    9408712
  • 财政年份:
    1994
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Ecological Interactions in Soil: Experiments on Populations and Processes
土壤中的生态相互作用:种群和过程实验
  • 批准号:
    8705468
  • 财政年份:
    1987
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant

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LTREB:合作研究:泥炭地碳通量的长期变化以及气候变化中水文、植被和氧化还原供应变化的相互作用
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    --
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LTREB Renewal: Long-term ecosystem responses to directional changes in precipitation amount and variability in an arid grassland
LTREB 更新:干旱草原中降水量和变异性方向变化的长期生态系统响应
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    2326482
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合作研究:LTREB 更新:RUI:具有对比纬度和多样性的热带森林再生长期变化的循环与人为原因
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    2325528
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