镉与氮含量和氮形态相互作用,影响入侵植物 Alternanthera philoxeroides 的生长

IF 1.7 4区 环境科学与生态学 Q3 ECOLOGY Aquatic Ecology Pub Date : 2023-09-30 DOI:10.1007/s10452-023-10065-3
Dan Li, Xiao-Gai Wang, Jia-Xin Yang, Yu-Fei Hu, Wen-Yue Lyu, Jun-Cai Xin, Rui Zhang, Zhi-Huan Chen, Chao Si
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引用次数: 0

摘要

重金属污染和植物入侵都是严重的全球环境问题。研究表明,养分的供应会影响入侵植物在重金属污染环境中的表现。然而,目前还不清楚不同形态的植物是否会受到不同养分的影响。我们进行了一项温室实验,测试镉(0.5、1 和 2 mg L-1)和氮浓度(0.5、2 和 8 mmol L-1)以及氮形态(氨氮、硝酸氮和甘氨酸)对入侵广布植物 Alternanthera philoxeroides 的影响。镉并不影响 Alternanthera philoxeroides 的整体生长。在镉存在的情况下,提供硝态氮比提供氨态氮或甘氨酸更有利于植物生长。镉与氮素水平和氮素形式相互作用,影响了植物的生长。在中等(1 毫克/升-1)和高(2 毫克/升-1)镉水平下,高浓度硝态氮(8 毫摩尔/升-1)对植物生长的促进作用明显降低。我们的研究结果表明,在镉污染的水中,Alternanthera philoxeroides 的生长表现与氮的水平和形式有关。这些发现可为预测Alternanthera philoxeroides在污染水体中的扩散提供依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Cadmium interacts with nitrogen level and nitrogen form to affect the growth of an invasive plant Alternanthera philoxeroides

Both heavy metal pollution and plant invasion are serious global environmental problems. Nutrient availability has been shown to influence the performance of invasive plants in heavy metal polluted environments. However, it is still unclear whether the effects of nutrients differ between different forms. We conducted a greenhouse experiment to test the effects of cadmium (0.5, 1 and 2 mg L−1) and nitrogen concentration (0.5, 2 and 8 mmol L−1) as well as nitrogen form (ammonia nitrogen, nitrate nitrogen and glycine) on the invasive, widespread plant Alternanthera philoxeroides. Cadmium did not affect the overall growth of Alternanthera philoxeroides. In the presence of cadmium, plants grew better when provided with nitrate nitrogen than with ammonia nitrogen or glycine. Cadmium interacted with nitrogen level and nitrogen form to affect the growth. At medium (1 mg L−1) and high (2 mg L−1) cadmium levels, promotion of high level nitrate nitrogen (8 mmol L−1) on plant growth was significantly reduced. Our results suggest that the growth performance of Alternanthera philoxeroides in cadmium polluted water is related to both nitrogen level and form. These findings could provide a basis for predicting the spread of Alternanthera philoxeroides in polluted water.

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来源期刊
Aquatic Ecology
Aquatic Ecology 环境科学-海洋与淡水生物学
CiteScore
3.90
自引率
0.00%
发文量
68
审稿时长
3 months
期刊介绍: Aquatic Ecology publishes timely, peer-reviewed original papers relating to the ecology of fresh, brackish, estuarine and marine environments. Papers on fundamental and applied novel research in both the field and the laboratory, including descriptive or experimental studies, will be included in the journal. Preference will be given to studies that address timely and current topics and are integrative and critical in approach. We discourage papers that describe presence and abundance of aquatic biota in local habitats as well as papers that are pure systematic. The journal provides a forum for the aquatic ecologist - limnologist and oceanologist alike- to discuss ecological issues related to processes and structures at different integration levels from individuals to populations, to communities and entire ecosystems.
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