Study on Niche of Dominant Shrub Populations in Karst Forest in Maolan Nature Reserve,Guizhou Province

doi:10.13466/j.cnki.lyzygl.2018.02.011

Abstract

Abstract:

To understand the niche characteristics of the shrubs in Karst forest,Based on investigation on the communities,the shrub populations at three sites in Maolan National Natural Reserve were taken as a research object.The niche breadth,niche similarity and niche overlap were used to analyze the niche characteristics of dominant shrub populations.The results showed that:1)niche breadths of Mallotus repandus and Nandina domestica were larger than other species with Levins (Bi) and Hurlberts (Ba) values being 0.471 9 and 0.966 0,0.466 3 and 0.926 1.2)The niche similarity among populations increased with niche breath,as shown between Mallotus repandus and Sinosideroxylon wightianum,Mallotus repandus and Nandina domestica,Nandina domestica and Sinosideroxylon wightianum,similarity values being 0.966 3、0.902 2 and 0.868 5;the demand for environmental resources had a greater similarity of the species,although the niche breadth was smaller,but its niche similarity ratio would be higher,as shown between Brassaiopsis glomerulata and Nothopanax davidii,similarity values being 0.911 3.3)Niche breadth among larger species with large niche overlap value,as shown between Mallotus repandus,Nandina domestica and Sinosideroxylon wightianum,niche overlap values were above 0.32.The study indicates that dominant shrub populations have stronger resource utilization ability in karst forest.The higher niche similarity and niche overlap of most dominant populations show that the interspecific competition is intensive and this may be caused by complexity and high heterogeneity of karst habitat.

Key words: Maolan, rarst forest, shrub population, niche, dominant population

CLC Number:

S718.5

QIN Suitao, LONG Cuiling, WU Bangli. Study on Niche of Dominant Shrub Populations in Karst Forest in Maolan Nature Reserve,Guizhou Province[J]. FOREST RESOURCES WANAGEMENT, 2018, (2): 58-64.

Figures/Tables 5

Tab.1

Tab.2

Tab.3

The niche breadth of dominant shrub populations in different terrains

序号	种类	$B i$	$B a$
1	皱叶海桐Pittospoeum crispulum	0.4145	0.6577
2	革叶铁榄Sinosideroxylon wightianum	0.4653	0.9257
3	裂果卫矛Euonymus dielsianus	0.4500	0.8268
4	南天竹Nandina domestica	0.4663	0.9261
5	湖北十大功劳Mahonia fortunei	0.4429	0.8102
6	石岩枫Mallotus repandus	0.4719	0.9660
7	球核荚蒾Viburnum propinquum	0.3721	0.5839
8	异叶梁王茶Nothopanax davidii	0.2561	0.2216
9	长梗罗伞Brassaiopsis glomerulata	0.1715	0.1518
10	中华蚊母树Distylium chinense	0.3165	0.3793
11	胡颓子Elaeaganus pungens	0.2817	0.4192
12	粗丝木Gomphandra tetrandra	0.4549	0.8592
13	苦木Picrasma quassioides	0.4010	0.5959
14	六月雪Serissa japonica	0.2991	0.4911

Tab.3

Tab.4

Tab.5

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地形	位置	土壤及覆盖度	土壤厚度/cm	枯枝落叶层厚度/cm	水分条件	光照条件
坡地	坡体中上部	黑色石灰土,覆盖度为40%	低凹处土层厚1~3	3~ 5	差	好
槽谷	下坡坡位	黑色石灰土,覆盖度为60%	低凹处土层厚2~6	3~ 7	适中	适中
漏斗	低凹处的负地形	黑色石灰土,覆盖度为85%	低凹处土层厚5~20	5~10	好(局部地段有积水)	差

种类	坡地	槽谷	漏斗	Σ
皱叶海桐Pittospoeum crispulum	12.10	6.91	26.35	45.36
革叶铁榄Sinosideroxylon wightianum	12.47	8.23	14.74	35.44
裂果卫矛Euonymus dielsianus	17.17	9.53	7.60	34.30
南天竹Nandina domestica	15.04	9.39	9.71	34.15
湖北十大功劳Mahonia fortunei	7.65	9.98	3.10	20.73
石岩枫Mallotus repandus	7.08	5.26	7.63	19.97
球核荚蒾Viburnum propinquum	6.90	9.69	0.99	17.58
异叶梁王茶Nothopanax davidii	1.22	11.30	1.21	13.73
长梗罗伞Brassaiopsis glomerulata	0	6.60	1.03	7.63
中华蚊母树Distylium chinense	4.57	1.52	0.31	6.39
胡颓子Elaeaganus pungens	0	2.24	4.13	6.37
粗丝木Gomphandra tetrandra	1.37	1.93	3.00	6.31
苦木Picrasma quassioides	1.20	0.76	3.13	5.09
六月雪Serissa japonica	2.41	0	2.00	4.41

物种	2	3	4	5	6	7	8	9	10	11	12	13	14
1	0.8350	0.6405	0.7035	0.5841	0.8012	0.4750	0.3293	0.2868	0.4676	0.7332	0.8457	0.9658	0.7195
2		0.8055	0.8685	0.7491	0.9663	0.6401	0.4093	0.3669	0.6326	0.6483	0.8657	0.8007	0.7677
3			0.9370	0.8066	0.8393	0.7266	0.4550	0.4126	0.7864	0.4995	0.7169	0.6063	0.7220
4				0.8036	0.9022	0.7236	0.4521	0.4096	0.7264	0.5595	0.7769	0.6692	0.7250
5					0.7828	0.8910	0.6484	0.6060	0.6494	0.5169	0.6890	0.5498	0.5286
6						0.6738	0.4404	0.3980	0.6403	0.6456	0.8630	0.7670	0.7366
7							0.6962	0.6075	0.6784	0.4078	0.5800	0.4408	0.4486
8								0.9113	0.3746	0.4401	0.4836	0.3263	0.1770
9									0.2859	0.4864	0.4411	0.2839	0.1346
10										0.2859	0.5033	0.4334	0.5959
11											0.7826	0.7645	0.4527
12												0.8428	0.6701
13													0.6882
14

物种			L_ih
物种			1		2		3		4		5		6		7		8		9		10		11		12		13	14
L_hi	1			0.2862		0.2350		0.2506		0.2042		0.2753		0.1707		0.1546		0.1620		0.1967		0.3320		0.2942		0.3419		0.3157
	2	0.3525				0.3163		0.3205		0.2909		0.3277		0.2751		0.2463		0.2443		0.3103		0.3339		0.3286		0.3549		0.3620
	3	0.2694		0.2943				0.3184		0.3092		0.2965		0.3203		0.2589		0.2392		0.3840		0.2135		0.2649		0.2615		0.3310
	4	0.3087		0.3206		0.3422				0.3202		0.3207		0.3237		0.2762		0.2627		0.3743		0.2673		0.3000		0.3041		0.3516
	5	0.2312		0.2673		0.3053		0.2941				0.2761		0.3598		0.3798		0.3757		0.3315		0.2383		0.2639		0.2249		0.2391
	6	0.3486		0.3370		0.3277		0.3296		0.3089				0.2988		0.2756		0.2731		0.3266		0.3327		0.3321		0.3498		0.3587
	7	0.1599		0.2092		0.2617		0.2461		0.2976		0.2209				0.3567		0.3503		0.2991		0.1664		0.2031		0.1512		0.1736
	8	0.0963		0.1246		0.1408		0.1398		0.2091		0.1356		0.2374				0.3483		0.1265		0.1668		0.1508		0.0953		0.0426
	9	0.0912		0.1117		0.1175		0.1201		0.1869		0.1214		0.2107		0.3147				0.0921		0.1702		0.1431		0.0921		0.0265
	10	0.1494		0.1914		0.2545		0.2308		0.2225		0.1959		0.2426		0.1541		0.1242				0.0674		0.1472		0.1369		0.2420
	11	0.2636		0.2153		0.1479		0.1723		0.1672		0.2086		0.1411		0.2125		0.2400		0.0705				0.2552		0.2766		0.1798
	12	0.3455		0.3133		0.2714		0.2859		0.2738		0.3079		0.2547		0.2842		0.2984		0.2276		0.3773				0.3533		0.3031
	13	0.3236		0.2728		0.2160		0.2336		0.1881		0.2615		0.1529		0.1447		0.1549		0.1706		0.3297		0.2848				0.2976
	14	0.2703		0.2516		0.2473		0.2444		0.1808		0.2425		0.1587		0.0585		0.0403		0.2728		0.1939		0.2210		0.2692