Development and degradation of Kobresia root mats and their effects on C and N turnover and C sequestration

嵩草根垫的发育和退化及其对碳氮周转和碳固存的影响

基本信息

项目摘要

Kobresia pastures represent the world’s largest alpine ecosystem sustaining huge herds of domestic and natural herbivores. Specific features of Kobresia root mats provide unique mechanisms protecting against degradation even by moderate overgrazing and leading to a large carbon storage. These mechanisms, however, remain descriptive and partly speculative because they were never proven in process-based studies. By addressing the underlying mechanisms of Kobresia root mat functioning we will change the existing paradigm that the root mats is the negative feature of strong degradation by overgrazing. We will apply an array of morphological, chronological, isotopic (13C, 15N, bomb-14C) and biomarker approaches to explain the mechanisms of Kobresia root mat functioning and their alteration by climate change. Most of the studies will be carried out at KEMA experimental station and include 13C/15N labelling experiments to trace C and N turnover in individual root mat horizons under manipulated moisture and temperature. To extrapolate the results for a broad range of spatio-temporal conditions, the development of the Kobresia vegetation during the Holocene will be studied for representative sites of the Tibetan Plateau in sediment archives using novel biomarker techniques. Results will help to mitigate pronounced overgrazing and land degradation of Kobresia ecosystems under changing climate.
嵩草牧场是世界上最大的高山生态系统,维持着大量的家养和天然食草动物。嵩草根垫的特殊功能提供了独特的机制,即使在适度过度放牧的情况下也能防止退化,并导致大量的碳储存。然而,这些机制仍然是描述性的,部分是推测性的,因为它们从未在基于过程的研究中得到证实。通过解决嵩草根垫功能的潜在机制,我们将改变现有的范式,根垫是过度放牧强烈退化的负面特征。我们将应用一系列的形态学,年代学,同位素(13 C,15 N,炸弹-14 C)和生物标志物的方法来解释嵩草根垫功能和气候变化的机制。大多数研究将在KEMA实验站进行,包括13 C/15 N标记实验,以跟踪在操纵的水分和温度下,在个别根垫层的C和N周转。为了外推广泛的时空条件下的结果,嵩草植被在全新世的发展将研究青藏高原的沉积物档案中的代表性网站使用新的生物标志物技术。研究结果将有助于缓解气候变化下嵩草生态系统的过度放牧和土地退化。

项目成果

期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Response of long-, medium- and short-term processes of the carbon budget to overgrazing-induced crusts in the Tibetan Plateau
  • DOI:
    10.1007/s10533-011-9632-9
  • 发表时间:
    2012-11
  • 期刊:
  • 影响因子:
    4
  • 作者:
    Sebastian Unteregelsbacher;S. Hafner;G. Guggenberger;G. Miehe;Xingliang Xu;Jianquan Liu;Y. Kuzyakov
  • 通讯作者:
    Sebastian Unteregelsbacher;S. Hafner;G. Guggenberger;G. Miehe;Xingliang Xu;Jianquan Liu;Y. Kuzyakov
Effect of grazing on carbon stocks and assimilate partitioning in a Tibetan montane pasture revealed by 13CO2 pulse labeling
  • DOI:
    10.1111/j.1365-2486.2011.02557.x
  • 发表时间:
    2012-02-01
  • 期刊:
  • 影响因子:
    11.6
  • 作者:
    Hafner, Silke;Unteregelsbacher, Sebastian;Kuzyakov, Yakov
  • 通讯作者:
    Kuzyakov, Yakov
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Professor Dr. Georg Guggenberger其他文献

Professor Dr. Georg Guggenberger的其他文献

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{{ truncateString('Professor Dr. Georg Guggenberger', 18)}}的其他基金

Characterization of structure and properties of bioorganoclays - perspective hybrid materials
生物有机粘土的结构和性能表征-透视杂化材料
  • 批准号:
    325474488
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Dichotomy of gluing and cementing agents in soil microaggregation
土壤微团聚中胶结剂和胶结剂的二分法
  • 批准号:
    276973281
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Units
Origin and fate of dissolved organic matter in the subsoil driven by dynamic exchange and remobilization processes
动态交换和再动员过程驱动的底土中溶解有机物的起源和归宿
  • 批准号:
    233437591
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Research Units
Functional ecology and sustainable management of the Munessa forest, Ethiopia - Central project
埃塞俄比亚 Munessa 森林的功能生态学和可持续管理 - 中央项目
  • 批准号:
    60105810
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Processes of belowground carbon cycling in the plant-mycorrhiza-soil system as affected by silvicultural management
造林管理对植物-菌根-土壤系统地下碳循环过程的影响
  • 批准号:
    42021277
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Origin and composition of organic N forms and related stabilization mechanisms in a soil chronosequence
土壤年代序列中有机氮形式的起源和组成以及相关的稳定机制
  • 批准号:
    33668129
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Functional ecology and sustainable management of the Munessa forest, Ethiopia - Central project and coordinating scientist
埃塞俄比亚 Munessa 森林的功能生态学和可持续管理 - 中央项目和协调科学家
  • 批准号:
    42123571
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Regeneration, Maintenance, and Sustainable Use of Pristine Forests in Ethiopia
埃塞俄比亚原始森林的更新、维护和可持续利用
  • 批准号:
    20950203
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Regeneration, maintenance, and sustainable use of pristine forests in Ethiopia - field station
埃塞俄比亚原始森林的更新、维护和可持续利用——实地站
  • 批准号:
    5420150
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Regeneration, Erhalt und nachhaltige Nutzung naturnaher Wälder Äthiopiens - Geländestation
埃塞俄比亚半天然森林的更新、保护和可持续利用 - 地形站
  • 批准号:
    5420152
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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TRIM21蛋白促进HIF1α的降解介导耳蜗血管纹缘细胞缺血再灌注致听力损伤的机制研究
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    2019
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    24.0 万元
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