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首页> 外文期刊>Geoderma: An International Journal of Soil Science >Land-use change effects on protozoic silicon pools in the Dajiuhu National Wetland Park, China
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Land-use change effects on protozoic silicon pools in the Dajiuhu National Wetland Park, China

机译：土地利用变化对大枣国家湿地公园的原始硅池效果

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摘要

Many peatlands have been damaged by human activities like Sphagnum harvesting and draining reflected in reduced peatland areas and ecosystem functioning. Peatlands generally play an important role in global silicon (Si) cycling and maintain huge numbers of testate amoebae (TA). However, there is a lack of knowledge on (i) the quantity of protozoic Si pools (represented by siliceous shells of TA) in peatlands and (ii) how these pools respond to land use changes caused by human influence. In our study, we quantified protozoic Si pools in the Dajiuhu National Wetland Park, China, with a focus on the comparison between peatland and cropland areas (i.e., former peatland drained for agriculture). We found protozoic Si pools to (i) represent an important biogenic silica fraction in peatlands and (ii) significantly differ between peatlands and croplands with soil moisture as a key factor for protozoic Si pool quantity showing a significant decrease of these pools in drained areas (i.e., in croplands). From our results we concluded the decrease of protozoic Si pools due to land-use change to represent another example (apart from the loss of phytogenic Si) for anthropogenic desilication in agricultural biogeosystems in general.
机译：许多泥炭块被人类活动损坏，如Sphagnum收获和减少在减少的泥炭地区域和生态系统运作中反映。泥炭地一般在全球硅（Si）循环中发挥着重要作用，并保持大量睾丸作用（TA）。然而，缺乏关于（i）泥炭地和（ii）这些游泳池在泥炭地的天生SI池（由TA的硅质壳代表）的数量（II）这些游泳池如何应对因人类影响而导致的土地利用变化。在我们的研究中，我们在中国大羽湖国家湿地公园定量了原始的SI池，重点是泥炭地和农田地区（即前泥炭地为农业排出）的比较。我们发现原始的SI池（I）代表泥炭地的重要生物原二氧化硅分数，（ii）泥炭地和土壤水分的泥炭和农田之间的显着差异，作为出现在排水区中这些游泳池的显着降低的关键因素（即，在农作物中）。从我们的结果来看，我们总结了土地使用变化导致的原始SI池减少，以代表另一个例子（除了植物生成SI的丧失），一般是农业生物盖系统中的人为溶血。

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