Trait–Abundance Relationships of Annual Ephemerals in Response to Nitrogen Addition in Gurbantunggut Desert
Trait–Abundance Relationships of Annual Ephemerals in Response to Nitrogen Addition in Gurbantunggut Desert
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DOI：
10.3390/d13110569
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Mao Wang;Haiyang Ma;D. Tan
中科院分区：
文献类型：
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作者：
Mao Wang;Haiyang Ma;D. Tan
了解氮素添加对物种性状-丰度关系的影响是群落生态学研究的核心内容之一，有助于深入了解大气氮沉降下群落聚集的机制。然而，很少有研究关注沙漠生态系统。本研究测定了新疆古尔班通古特沙漠早春各施氮样地一年生植物的丰度、生态化学计量特征、叶片碳含量（LCC）、氮含量（LNC）和磷含量（LPC）。结果表明，LNC、N:P和C:N与物种丰度之间存在显著的相关关系，表明生态化学计量学是解释和预测物种丰度的良好指标。我们进一步发现，在不同氮添加水平下仍存在显著的性状丰度关系。结果表明，基于性状的生态位组合理论在确定大气氮沉降条件下物种丰度方面具有重要作用。
Understanding the effect of nitrogen addition on species trait–abundance relationships is one of the central focuses of community ecology and can offer us insights into the mechanisms of community assembly under atmospheric nitrogen deposition. However, few studies have focused on desert ecosystems. In this study, we measured the abundance and ecological stoichiometric traits, leaf carbon content (LCC), nitrogen content (LNC), and phosphorus content (LPC) for all annual ephemerals in all plots subjected to nitrogen addition in early spring in Gurbantunggut Desert, northern Xinjiang, China. We found a significant relationship between traits (LNC, N:P, and C:N) and abundance, indicating that ecological stoichiometry is a good proxy for explaining and predicting species abundance. We further found that significant trait–abundance relationships still existed under different nitrogen addition levels. The result suggests that trait-based niche-assembly theory plays an important role in determining species abundance under atmospheric nitrogen deposition.