Analysis on the Spatial Distribution Characteristics of Representative Populations in Tropical Rainforest of Hainan

doi:10.13466/j.cnki.lczyyj.2023.05.016

Abstract

Abstract:

Representative populations play an innegligible role in ecological early warning and biodiversity conservation1.The assessment of endangered species is the key basis for the priority conservation of biodiversity,analysis on the distribution pattern of representative populations from the perspective of suitable survival area.The results showed that:1)There were 10~25 species of representative populations potentially distributed in most areas of the National Park of Hainan Tropical Rainforest,accounting for 83.86% of the total area.2)The distribution of representative populations was mainly affected by altitude and vegetation type.The overall number of species distribution showd a radiation state of decreasing distribution from high altitude to low altitude,from primary forest to secondary forest and plantation.3)The construction of the National Park of Hainan Tropical Rainforest already opened up the boundary between the original protected areas and greatly promoted the interconnection of the ecosystem.However,there were still large areas of high hotspots of endangered plants that have not been included in the core protected areas.Therefore,more attention should be paid to these areas.The survival status of representative populations directly reflected the current characteristics of tropical rainforest ecosystems to a large extent.The research results can provide reference and theoretical basis for the ecological planning and biodiversity protection of the National Park of Hainan Tropical Rainforest.

Key words: National Park of Hainan Tropical Rainforest, representative populations, suitable areas, Maxent model

CLC Number:

S718.54

WU Tingtian, CHEN Yiqing, CHEN Zongzhu, LEI Jinrui, CHEN Xiaohua, LI Yuanling. Analysis on the Spatial Distribution Characteristics of Representative Populations in Tropical Rainforest of Hainan[J]. Forest and Grassland Resources Research, 2023, (5): 133-141.

Figures/Tables 9

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变量类型	变量因子	描述
气候变量	bio_01	年均温/℃
	bio_02	平均气温日较差/℃
	bio_03	等温性
	bio_04	温度季节性变化
	bio_05	最热月最高温/℃
	bio_06	最冷月最低温/℃
	bio_07	年均温变化范围/℃
	bio_08	最湿季度平均温度/℃
	bio_09	最干季度平均温度/℃
	bio_10	最热季度平均温度/℃
	bio_11	最冷季度平均温度/℃
	bio_12	年均降水量/mm
	bio_13	最湿月降水量/mm
	bio_14	最干月降水量/mm
	bio_15	降水量变异系数/%
	bio_16	最湿季度降水量/mm
	bio_17	最干季度降水量/mm
	bio_18	最热季度降水量/mm
	bio_19	最冷季度降水量/mm
地形变量	alt	海拔/m
	slo	坡度/(°)
	asp	坡向/(°)
植被变量	vegetation	植被类型
植被变量	NDVI	归一化植被指数
土壤变量	soil	土壤类型
人类胁迫变量	pop	人口密度/(人/km²)
人类胁迫变量	gdp	人均GDP/(元/人)

种群	训练AUC	测试AUC	种群	训练AUC	测试AUC
白桫椤Sphaeropteris brunoniana	0.967	0.953	鸡毛松Dacrycarpus imbricatus var.patulus	0.984	0.979
半枫荷Semiliquidambar cathayensis	0.995	0.990	蕉木Chieniodendron hainanense	0.971	0.937
大叶黑桫椤Alsophila gigantea	0.980	0.970	金毛狗Cibotium barometz	0.983	0.956
海南粗榧Cephalotaxus mannii	0.994	0.990	野生荔枝Litchi chinensis	0.878	0.838
海南大风子Hydnocarpus hainanensis	0.947	0.915	野生龙眼Dimocarpus longan	0.910	0.882
海南风吹楠Horsfieldia kingii	0.965	0.931	陆均松Dacrydium pectinatum	0.987	0.980
油楠Sindora glabra	0.976	0.949	坡垒Hopea hainanensis	0.985	0.976
海南石梓Gmelina hainanensis	0.963	0.904	青梅Vatica mangachapoi	0.951	0.929
海南苏铁Cycas hainanensis	0.975	0.913	桫椤Alsophila spinulosa	0.985	0.978
海南梧桐Firmiana hainanensis	0.967	0.916	土沉香Aquilaria sinensis	0.941	0.893
海南五针松Pinus fenzeliana	0.997	0.995	小钩叶藤Plectocomia microstachys	0.984	0.935
海南紫荆木Madhuca hainanensis	0.978	0.946	普洱茶Camellia sinensis var.assamica	0.985	0.978
黑桫椤Alsophila podophylla	0.977	0.962	阴生桫椤Alsophila latebrosa	0.979	0.964
红椿Toona ciliata	0.945	0.834	油丹Alseodaphne hainanensis	0.988	0.983
蝴蝶树Heritiera parvifolia	0.975	0.964	华南五针松Pinus kwangtungensis	0.999	0.997

序号	环境变量	贡献率/%
1	alt 海拔	44.63
2	vegetation 植被类型	7.45
3	slo 坡度	4.99
4	bio_10 最热季度平均温度	4.73
5	bio_05 最热月最高温	4.10
6	bio_03 等温性	3.63
7	gdp 人均GDP	3.22
8	bio_13 最湿月降水量	3.06
9	asp 坡向	2.32
10	bio_12 年均降水量	2.25
11	pop 人口密度	2.12
12	soil土壤类型	2.07
13	bio_04 温度季节性变化	2.02
14	bio_08 最湿季度平均温度	1.37
15	bio_01 年均温	1.35
16	bio_19 最冷季度降水量	1.33
17	bio_07 年均温变化范围	1.20
18	bio_09 最干季度平均温度	1.18
19	NDVI 归一化植被指数	1.18
20	bio_15 降水量变异系数	1.03
21	bio_16 最湿季度降水量	0.96
22	bio_14 最干月降水量	0.96
23	bio_11 最冷季度平均温度	0.72
24	bio_02 平均气温日较差	0.62
25	bio_18 最热季度降水量	0.59
26	bio_06 最冷月最低温	0.59
27	bio_17 最干季度降水量	0.32

种群数量/种	面积/km²			占比/%
种群数量/种	核心保护区	一般控制区	合计	占比/%
<5	6.16	64.02	70.18	1.64
5~<10	253.89	307.78	561.67	13.16
10~<15	347.28	549.62	896.90	21.01
15~<20	603.85	469.40	1 073.25	25.14
20~<25	1 065.42	544.24	1 609.66	37.71
≥25	54.41	2.93	57.34	1.34