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首页> 外文期刊>Ecological research >Impact of rainfall gradient on aboveground biomass and soil organic carbon dynamics of forest covers in Gujarat, India
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Impact of rainfall gradient on aboveground biomass and soil organic carbon dynamics of forest covers in Gujarat, India

机译：印度古吉拉特邦降雨梯度对森林覆盖层地上生物量和土壤有机碳动态的影响

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摘要

Alterations in precipitation are affecting forest ecosystems' soil carbon cycling. To understand how shifts in rainfall may alter these carbon pools, above-ground biomass (AGB), soil organic carbon (SOC), and microbial biomass carbon (MBC) of tropical forest covers were measured across a rainfall gradient (543-1590 mm) in Gujarat (India), a state falling under semi arid to tropical dry-wet conditions. Species diversity, tree density and soil texture were also measured. Field visits and data collection were carried out for 2 years (2009-2011) in 95 plots of 250 × 250 m in the forest covers across four distinct rainfall zones (RFZs). Data analysis showed that differences seen in the values of the measured parameters across the RFZs are statistically significant (P ＜ 0.05). Positive correlations were observed between mean annual precipitation (MAP) and tree density, species diversity, AGB, SOC, and MBC. Across the RFZs, AGB ranged between 0.09 and 168.28 Mg ha~(-1); SOC values (up to 25 cm soil depth) varied between 2.94 and 147.84 Mg ha~(-1). Soil texture and MBC showed a significant impact on the dynamics of SOC in all the RFZs. MBC is more influenced by SOC rather than AGB. Both vegetation type and MAP have an important role in the regulation of SOC in tropical soils. Together, these results reveal complex carbon cycle responses are likely to occur in tropical soils under altered rainfall regimes.
机译：降水的变化正在影响森林生态系统的土壤碳循环。为了了解降雨的变化可能如何改变这些碳库，对热带森林覆盖层的地上生物量（AGB），土壤有机碳（SOC）和微生物生物量碳（MBC）进行了跨降雨梯度（543-1590 mm）的测量。在印度古吉拉特邦（Gujarat），该州处于半干旱至热带干湿条件下。还测量了物种多样性，树木密度和土壤质地。进行了为期2年（2009年至2011年）的实地访问和数据收集工作，涉及95个250×250 m的样地，覆盖了四个不同的降雨带（RFZ）。数据分析表明，跨RFZ的测量参数值存在统计学差异（P ＜0.05）。在年平均降水量（MAP）与树木密度，物种多样性，AGB，SOC和MBC之间观察到正相关。整个RFZ的AGB范围在0.09至168.28 Mg ha〜（-1）之间； SOC值（最大土壤深度为25 cm）在2.94和147.84 Mg ha〜（-1）之间变化。土壤质地和MBC对所有RFZ中SOC的动力学都有显着影响。 MBC受SOC而不是AGB的影响更大。植被类型和MAP在热带土壤SOC的调节中都起着重要作用。总之，这些结果表明，在变化的降雨制度下，热带土壤中可能发生复杂的碳循环响应。

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  • 来源
    《Ecological research》 |2014年第6期|1053-1063|共11页
  • 作者

    Nirav Mehta; Neeta R. Pandya; V. O. Thomas; N. S. R. Krishnayya;

  • 作者单位

    Ecology Laboratory, Department of Botany, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat 390 002, India;

    Ecology Laboratory, Department of Botany, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat 390 002, India;

    Department of Mathematics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat 390 002, India;

    Ecology Laboratory, Department of Botany, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat 390 002, India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rainfall; Forests; Biomass; Soil carbon; Microbial biomass carbon;

    机译：雨量;森林;生物质土壤碳;微生物生物量碳;

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