天山云杉林地上植被与土壤种子库物种相似性

doi:10.6048/j.issn.1001-4330.2024.09.018

摘要/Abstract

摘要：

【目的】研究天山云杉林地上植被与土壤种子库物种相似性。【方法】以天山云杉(Picea schrenkiana var. tianshanica)林土壤种子库为研究对象,采用野外采样调查与室内萌发相结合,分析土壤种子库与地上植被的物种相似性。【结果】在天山云杉林分布海拔1 600~2 700 m,地上植被与土壤种子库的Jaccard系数为0.216~0.469,Sorensen系数在0.356~0.639,为中等不相似;土壤种子库相似系数随地上植被相似系数变化而出现相同变化,二者相似系数呈正相关;地上植被物种多样性远远大于土壤种子库,地上植被物种多样性与种子库物种多样性为正相关。【结论】随海拔的升高,土壤种子库与地上植被物种相似性总体上为先升高后降低的变化;地上植被物种多样性高于土壤种子库的物种多样性,物种多样性随海拔上升多样性下降。

关键词: 天山云杉; 地上植被; 土壤种子库; 物种相似性

Abstract:

【Objective】 The soil seed bank has a significant impact on vegetation renewal and restoration, and is of great significance for the biodiversity protection and vegetation renewal and restoration of the Tianshan spruce forest ecosystem. 【Methods】 The soil seed bank of Picea schrenkiana var. tianshanica forest was taken as the research object, and field sampling investigation was combined with indoor germination to explore the species similarity between the soil seed bank and aboveground vegetation. 【Results】 Within the altitude range of 1,600 to 2,700 meters, the Jaccard coefficients of aboveground vegetation and soil seed banks were between 0.216 and 0.469, and the Sorensen coefficients were between 0.356 and 0.639, indicating moderate dissimilarity; The similarity coefficient of soil seed banks varied with the similarity coefficient of vegetation, and the similarity coefficients of the two were positively correlated; The diversity of aboveground vegetation species was much greater than that of soil seed banks, and there was a positive correlation between aboveground vegetation species diversity and seed bank species diversity. 【Conclusion】 With the increase of altitude, the similarity between soil seed banks and aboveground vegetation species generally increases first and then decreases. The species diversity of aboveground vegetation is higher than that of soil seed banks. Species diversity decreases with increasing altitude.

Key words: Picea schrenkiana var. tianshanica; aboveground vegetation; soil seed bank; species similarity

中图分类号:

S791.18

李振瑜, 耿召坤, 赵善超, 高玉德, 王褚, 王世伟, 潘存德, 张国林. 天山云杉林地上植被与土壤种子库物种相似性[J]. 新疆农业科学, 2024, 61(9): 2230-2236.

LI Zhenyu, GENG Zhaokun, ZHAO Shanchao, GAO Yude, WANG Chu, WANG Shiwei, PAN Cunde, ZHANG Guolin. Species similarity between vegetation and soil seed bank in Tianshan spruce forest[J]. Xinjiang Agricultural Sciences, 2024, 61(9): 2230-2236.

图/表 5

表1 样线的分布

Tab.1 Distribution of sample lines

样线编号 Plot No.	海拔 Altitude (m)	郁闭度 Canopy density	坡度 Slope (°)	坡向 Aapect (°)	平均树龄 Average Age (a)	平均胸径 Mean DBH (cm)	平均树高 Average height (m)
1	1 600	0.4	31	NW	93	26.5	20.0
2	1 700	0.5	14	NW	94	31.6	19.1
3	1 800	0.5	19	NW	109	28.2	20.6
4	1 900	0.3	24	N	114	37.0	20.6
5	2 000	0.5	27	N	106	37.2	27.2
6	2 100	0.5	29	NE	113	38.2	16.8
7	2 200	0.4	20	N	116	41.4	18.8
8	2 300	0.4	16	NE	107	31.6	21.2
9	2 400	0.41	20	N	105	28.4	19.5
10	2 500	0.38	26	N	120	35.4	24.8
11	2 600	0.34	27	N	110	27.5	17.8
12	2 700	0.36	31	NE	92	28.1	17.7

图1 地上植被与土壤种子库物种相似性

Fig.1 Species similarity between aboveground vegetation and soil seed bank

图2 不同海拔梯度地上植被与土壤种子库Pearson

Fig.2 Pearson analysis of aboveground vegetation and soil seed banks at different altitude gradients

图3 地上植被与土壤种子库物种多样性

Fig.3 Species diversity of above-ground vegetation and soil seed bank

图4 土壤种子库和地上植被物种多样性的相关性

Fig.4 Correlation analysis of soil seed bank and above-ground vegetation species diversity

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