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首页> 外文期刊>Pedobiologia >Long-term dynamics of Collembola in a pine forest ecosystem
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Long-term dynamics of Collembola in a pine forest ecosystem

机译：松树林生态系统中Collembola的长期动态

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摘要

Biomonitoring data on soil Collembola collected over a six year period (1992-1997) in Scots pine (Pines sylvestris L.) forest in the Northern Vidzeme Biosphere Reserve, northern Latvia, are analysed. Monitoring was conducted in three plots: young (30-40 years), middle-aged (50-70 years), and old (150-200 years) pine stands. Sampling was performed once a year, in late August or early September, according to a systematic sampling scheme. One hundred soil cores (5 cm(2) x 10 cm) were taken within each plot every year, Collembola were extracted from the cores by using a modified high gradient extractor. During the monitoring period, there was a tendency of climate warming between 1992 and 1997. A decrease of precipitation resulted in decrease of soil moisture in the studied plots. Species richness S and Shannon's index H' within almost all plots showed significant linear decreasing trends, while no trends were found in total density of Collembola. Several species (Sphaeridia pumilis, Sminthurinus aureus, Pseudanurophorus binoculatus, Anurophorus septentrionalis, Arrhopalites spp.) decreased in density during the period of investigation. The possible reasons for the changes in the collembolan community are discussed.
机译：分析了在拉脱维亚北部维德泽姆生物圈保护区的苏格兰松树（Pines sylvestris L.）森林中六年（1992-1997年）收集的土壤Collembola的生物监测数据。监测在三个样地中进行：年轻（30-40岁），中年（50-70岁）和老（150-200年）松林。根据系统的抽样方案，每年8月下旬或9月初进行一次抽样。每年在每个样地内采集一百个土壤岩心（5 cm（2）x 10 cm），使用改良的高梯度提取器从岩心中提取Collembola。在监测期内，1992年至1997年间存在气候变暖的趋势。降水减少导致研究区土壤水分减少。几乎所有样地中的物种丰富度S和Shannon指数H'都显示出显着的线性下降趋势，而Collembola的总密度没有发现趋势。在调查期间，几种物种的密度降低了（Sphaeridia pumilis，Sminthurinus aureus，Pseudanurophorus binoculatus，Anurophorus septentrionalis，Arrhopalites spp。）。讨论了collembolan社区发生变化的可能原因。

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