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首页> 外文期刊>Landbauforschung >Floristic diversity in Short Rotation Coppice (SRC) plantations: comparison between soil seed bank and recent vegetation.
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Floristic diversity in Short Rotation Coppice (SRC) plantations: comparison between soil seed bank and recent vegetation.

机译：短轮伐木（SRC）人工林的植物多样性：土壤种子库与近期植被的比较。

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In the near future an increase in Short Rotation Coppice (SRC) plantations is to be expected. The objective was to compare the recent vegetation and the soil seed bank in SRC plantations to reveal the functioning of the soil seed bankfor phyto-diversity and vegetation structure after reconversion of SRC plantations into arable land. For the analyses, above-ground vegetation surveys and soil seed bank samples of six German and four Swedish SRC plantations were used. Similarity in composition of soil seed banks and recent vegetation was low in terms of species, plant strategy types, species habitat preferences and seed longevity. On average, the proportion of common species of recent vegetation and soil seed bank was 8.4% (+or-6.7% SD). The recent vegetation was dominated by competitive (c) plant species while in the soil seed banks highest proportions were detected for ruderals (r) and competitors (c). Species with long-term persistent seeds had the highest contribution to both the recent vegetation and the soil seed banks. Grassland species had highest species habitat preference proportion in the recent vegetation. The soil seed banks contained predominantly ruderal species and woodland species were almost absent. Due to the poor coherence of seed bank vs. recent vegetation, we conclude that the site history has only a minor influence on phytodiversity in SRC plantations, suggesting that recent vegetation composition is mainly due to the species pool of the adjacent vegetation and site conditions like below-canopy irradiance and site nutrition.
机译：在不久的将来，预计短期轮作（SRC）人工林将有所增加。目的是比较SRC人工林最近的植被和土壤种子库，以揭示SRC人工林改种为耕地后土壤种子库对植物多样性和植被结构的作用。为了进行分析，使用了六个德国和四个瑞典SRC人工林的地上植被调查和土壤种子库样本。就物种，植物策略类型，物种生境偏好和种子寿命而言，土壤种子库和近期植被的组成相似性很低。平均而言，最近的植被和土壤种子库中常见物种的比例为8.4％（标准差为+或-6.7％）。最近的植被以竞争性（c）植物种为主，而在土壤种子库中，鱼（r）和竞争者（c）的比例最高。具有长期持久种子的物种对最近的植被和土壤种子库的贡献最大。在最近的植被中，草地物种具有最高的物种栖息地偏好比例。土壤种子库主要包含种，而林地种类几乎不存在。由于种子库与近期植被的一致性差，我们得出结论，该地点的历史对SRC人工林的植物多样性影响较小，这表明近期植被的组成主要是由于邻近植被的物种库和场地条件如冠层以下辐射和部位营养。

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