| 石羊河尾闾青土湖荒漠植物群落种间关联及生态位研究 |
| Interspecific Association and Niche of Desert Plant Communities in Qingtu Lake, the Tail of Shiyang River |
| 投稿时间：2022-04-09 修订日期：2022-06-04 |
| DOI：10.15928/j.1674-3075.202204090105 |
| 中文关键词:荒漠植物 种间关联 生态位 青土湖 |
| 英文关键词:desert plant interspecific association niche Qingtu Lake |
| 基金项目:甘肃省自然科学基金（20JR5RA095，20JR5RA091）；国家自然科学基金地区基金（32060371）；甘肃省林业和草原局自列项目（2019kj121）；甘肃省荒漠化与风沙灾害防治重点实验室开放基金(GSDC201902)资助；甘肃省重点研发计划（20YF3FA008） |
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| 中文摘要: |
| 探究荒漠植物群落种间关系，为石羊河尾闾干涸湖泊植被恢复与重建提供理论支撑。2018年9月，在石羊河下游青土湖设置3条调查样带，共调查灌木样方27个，草本样方81个。采用方差比率法、χ2检验、Pearson相关、Spearman秩相关、联结系数Ochiai和生态位量化方法，开展荒漠植物群落种间关联程度、生态位宽度及生态位重叠特征研究。结果表明：青土湖荒漠植物群落包括24个植物种，其中灌木8种，多年生草本8种，一年生草本8种，草本植物占总物种数的66.67%。不同生活型荒漠植物中重要值最大的分别为白刺（Nitraria tangutorum）、芦苇(Phragmites australis)、猪毛菜（Salsola collina）。方差比率分析表明，青土湖荒漠植物群落种间总体上呈现不显著负联结的关系，群落处于波动演替状态。Ochiai系数0~0.3的种对占总对数的72.83%，种对间的相关性较弱。生态位宽度较大的灌木有白刺（21.728）、梭梭Haloxylon ammodendron（10.321）、黑果枸杞Lycium ruthenicum（5.711）；多年生草本有芦苇（12.556）、黄花补血草Limonium aureum（4.874）、荒漠黄耆Astragalus grubovii（4.248）；一年生草本猪毛菜（9.340）、盐生草（7.822）、雾冰藜（6.237）。生态位重叠较大的种对有灰绿藜和碟果虫实（0.84）、沙蒿和戈壁驼蹄瓣（0.77）、黄花补血草和画眉草（0.77）、砂蓝刺头和红砂（0.75）。群落物种生态位重叠均值为0.12，种间竞争较小。建议在石羊河下游青土湖人工植物群落构建过程中重视种间关系，选择种间竞争小的灌木和多年生草本植物作为生态恢复的植物种。 |
| 英文摘要: |
| Qingtu Lake, located in the Tail of Shiyang River, serves as the important ecological barrier to block the connection of the Tengger Desert and the Badain Jaran Desert. In this study, we explored the interspecific relationship of desert plant community in Qingtu Lake, focusing on the interspecies association degree, niche width and niche overlap characteristics. The study aimed to provide theoretical support for vegetation restoration and reconstruction of dry lakes in the tail of Shiyang River. The study was based on the field survey conducted in September 2018, and 3 sampling belt including 27 shrub sampling plots and 81 herb sampling plots were set during the investigation, and the species, individual number, coverage and hight of the vegetation as well as the altitude, the longitude and latitude of the sampling plots were recorded. The variance ratio method, χ2 test, Pearson correlation, Spearman rank correlation, Ochiai association coefficient and niche quantification methods were used to analyze the interspecific relationship of desert plant community. Results show that a total of 24 plant species were identified during the investigation, including 8 shrubs, 8 perennial herbs and 8 annual herbs. Herbaceous plants accounted for 66.67 % of the total species. The dominant species were Nitraria tangutorum, Phragmites australis, and Salsola collina according to their importance values in different life style species. Analysis of the variance ratio shows that there was no significantly negative association between the species of the desert vegetation community in Qingtu Lake, and the community was in a state of fluctuating succession. The species pairs with Ochiai coefficients of 0-0.3 accounted for 72.83% of the total pairs, and the correlation between species pairs was weak. Plant species with higher niche width in the desert vegetation community included shrub Nitraria tangutorum (21.728), Haloxylon ammodendron (10.321) and Lycium ruthenicum (5.711); Perennial herbs Phragmites australis (12.556), Limonium aureum (4.874) and Astragalus grubovii (4.248); Annual herbs Salsola collina (9.340), Halogeton glomeratus (7.822) and Bassia dasyphylla (6.237). Species pairs with higher niche overlap were Chenopodium glaucum and Corispermum patelliforme (0.84), Artemisia desertorum and Zygophyllum gobicum (0.77), Limonium aureum and Eragrostis pilosa (0.77), Echinops gmelinii and Reaumuria soongarica (0.75)，Haloxylon ammodendron and Bassia dasyphylla (0.71). The overall niche overlap of the desert vegetation community in the Qingtu Lake was 0.12, indicating weak competition among the plant species. It is suggested that shrub and perennial herbaceous plants with little interspecific competition should be selected as the plant species for ecological restoration in Qingtu Lake, the tail of Shiyang River. |
| 耿东梅,赵鹏,陈亚东,张裕年,段晓峰.2024.石羊河尾闾青土湖荒漠植物群落种间关联及生态位研究[J].水生态学杂志,45(2):121-131. |
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