巴丹吉林沙漠南缘沙地芦苇种群生态特征

doi:10.13866/j.azr.2022.01.21

Abstract

Abstract:

The structural characteristics, age structure, dynamic characteristics, and spatial distribution pattern of Phragmites australis in two types of sandy habitat in the southern margin of Badain Jaran Desert were investigated. Results showed that the following. (1) The plant height, total biomass, and biomass of each component of Phragmites australis in common sandy land were higher than those in saline sandy land. Soil water content and salt content were the important driving factors for the differences in Phragmites australis morphological characteristics in this area. (2) Due to the different soil conditions and the different degrees of interspecies competition, different age structures and dynamic change trends were shown in different sample plots; in common sandy soil, the Phragmites australis population tended to decline, whereas the population of Phragmites australis in saline sand soil tended to increase. (3) The spatial pattern of the Phragmites australis population in the common sandy habitat had an aggregated distribution on a scale of 0-4 m and a random distribution on a scale >4 m. However, the function values of the saline sandy habitat were generally between two enveloped trace lines and distributed randomly on a scale from 0 to 10 m.

Key words: Badain Jaran Desert, sand, Phragmites australis population, component characteristics, age structure, quantitative dynamic change, spatial distribution pattern

LIU Xin,JIAO Jian,WANG Ting,ZHANG Lingyu,LI Chaozhou. Population ecological features of Phragmites australis in sandy habitats on the southern edge of Badain Jaran Desert[J].Arid Zone Research, 2022, 39(1): 220-229.

Figures/Tables 11

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生境类型	水分/%	盐分/%	pH	有机质/（g·kg^-1）
盐渍沙地	16.02±0.83a	2.13±0.33a	8.66±0.08a	0.73±0.02a
普通沙地	9.15±0.77b	0.70±0.06b	7.53±0.13b	0.69±0.03a

生境类型	株高/cm	基径/mm	花序长度/cm	分蘖数
盐渍沙地	63.33±18.06b	2.70 ±1.21b	14.30±7.65b	7.54 ±3.56a
普通沙地	115.12 ±47.4a	4.90 ±3.96a	21.88 ±4.23a	4.25 ±0.44b

生境类型	叶鞘生物量/g	叶生物量/g	茎生物量/g	花序生物量/g	地上部分生物量/g
盐渍沙地	1.43±0.17a	1.85±0.21b	3.96±0.06b	0.84±0.03b	6.2±3.11b
普通沙地	1.06±0.25a	2.46±0.44a	5.28±0.32a	1.37±0.25a	10.24±4.34a

生境	龄级	a_x	l_x	lnl_x	d_x	q_x	L_x	T_x	e_x	S_x	K_x
盐渍沙地	Ⅰ	103	1000	6.908	194	0.194	903	3121	3.121	0.806	0.032
	Ⅱ	83	806	6.692	39	0.048	786	2218	2.753	0.952	0.007
	Ⅲ	79	767	6.642	272	0.354	631	1432	1.867	0.646	0.068
	Ⅳ	51	495	6.205	78	0.157	456	801	1.618	0.843	0.028
	Ⅴ	43	417	6.034	282	0.674	277	345	0.826	0.326	0.206
	Ⅵ	14	136	4.912	136	-	68	68	0.500	-	-
普通沙地	Ⅰ	18	462	6.135	-282	-0.611	603	3718	8.056	1.611	-0.075
	Ⅱ	29	744	6.611	-154	-0.207	821	3115	4.190	1.207	-0.028
	Ⅲ	35	897	6.800	-103	-0.114	949	2295	2.557	1.114	-0.016
	Ⅳ	39	1000	6.908	410	0.410	795	1346	1.346	0.590	0.080
	Ⅴ	23	590	6.380	333	0.565	423	551	0.935	0.435	0.140
	Ⅵ	10	256	5.547	256	-	128	128	0.500	-	-

Population ecological features of Phragmites australis in sandy habitats on the southern edge of Badain Jaran Desert

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