富氮条件下种子库多样性丧失的多重机制

IF 5.3 1区环境科学与生态学 Q1 ECOLOGY

Journal of Ecology Pub Date : 2025-01-27 DOI:10.1111/1365-2745.14486

Miaojun Ma, Anu Eskelinen, Yunpeng Zhao, Carol C. Baskin, Chunming Xin, Panhong Zhang, Zengpeng Guo, Hui Zhang, Xuejing Wang, Pengfei Zhang, Guozhen Du

引用次数: 0

摘要

土壤种子库是一个隐藏在地下的群落，是植物生物多样性的重要组成部分。氮(N)富集会降低地上植物群落和种子库的物种多样性。然而，氮富集对土壤种子库的影响机制尚不清楚。通过青藏高原东部高寒草甸土壤种子库增氮试验，探讨了土壤种子库氮富集的直接和间接机制。我们结合地上植物群落和凋落物数据、真菌多样性、种子库调查和种子雨监测，进行了种子埋藏试验，以探讨种子活力。研究发现，种子库物种多样性的丧失速度比地上植物群落要慢。富氮直接影响种子库，降低种子活力，促进种子萌发。富氮处理下，小种子比大种子更容易丧失活力，种子萌发率更高。同时，N的富集也通过改变植物群落组成、增加凋落物数量和真菌多样性间接降低了种子库物种丰富度和种子数量。富氮还通过减少种子雨中的种子数量间接减少种子库中的种子数量，且负效应随着富氮水平的提高而增强。合成。我们的研究结果为富氮条件下植物种子库多样性丧失的多种直接和间接机制提供了新的见解，对富氮系统中植物多样性的维持、生态系统的恢复和恢复具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Multiple mechanisms associated with loss of seed bank diversity under nitrogen enrichment

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Multiple mechanisms associated with loss of seed bank diversity under nitrogen enrichment

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来源期刊

Journal of Ecology 环境科学-生态学

CiteScore

10.90

自引率

5.50%

发文量

207

审稿时长

3.0 months

期刊介绍： Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.