CAJ | 학술논문

经调查和统计,江苏分布的中国种子植物特有属有18属,含19种,隶属于17个科,科、属、种分别占中国种子植物特有属总数的19.32%、5.61%和2.53%.根据自然地理特征将江苏分为6个地区:黄淮平原、江淮平原、滨海平原、长江三角洲、北部低山丘陵和西南低山丘陵.首次采用特有性指数(EI)研究上述地区的特有属分布,结果发现:EI值最高的是西南低山丘陵(4.83),其次是长江三角洲(3.89),黄淮平原和滨海平原的特有性指数最低(1.67).因此该区的特有属植物的种类组成较贫乏,地理分布不均,并具有生活型多样,古特有属比例较高等特征.
경조사화통계,강소분포적중국충자식물특유속유18속,함19충,대속우17개과,과、속、충분별점중국충자식물특유속총수적19.32%、5.61%화2.53%.근거자연지리특정장강소분위6개지구:황회평원、강회평원、빈해평원、장강삼각주、북부저산구릉화서남저산구릉.수차채용특유성지수(EI)연구상술지구적특유속분포,결과발현:EI치최고적시서남저산구릉(4.83),기차시장강삼각주(3.89),황회평원화빈해평원적특유성지수최저(1.67).인차해구적특유속식물적충류조성교빈핍,지리분포불균,병구유생활형다양,고특유속비례교고등특정.
By investigation and statistics, we found that there were 18 Chinese endemic genera of seed plants in Jiangsu, containing 19 species, which belonged to 17 families. The percentages of the same group possessing in Jiangsu of China were: 19.32% of 88 families, 5.61% of 321 genera, and 2.53% of 751 species. According to its natural geographical features, we divided Jiangsu Province into six regions: Huanghuai Plain, Jianghuai Plain, Binhai Plain, Changjiang Delta, Northern low Massif and Southwest low Massif. It was for the first time that endemic index (EI) was applied to reveal the distribution pattern of the endemic genera in the regions. The result showed that the highest EI among six regions was 4.83, which appeared in Southwest low Massif; the second one was 3.89, which appeared in Changjiang Delta; the lowest one was 1.67, which appeared in Huanghuai Plain or Binhai Plain. The characteristics of Chinese endemic genera of seed plants in Jiangsu were as follows:(1)The floristic composition was relatively poor;(2)The geographical distribution was fairly uneven;(3)Most of these 18 genera, with different life forms, were palaeoendemic genera.