【作者】 方炜； 彭少鳞； 何道泉；

【Author】 Fang Wei,Peng Shaolin,He Daoquan (South China Institute of Botany.Academia Sinica,Guangzhou 510650)

【机构】 中国科学院华南植物研究所；

【摘要】 本文研究了广州白云山次生林群落演替6年间在其种群结构水平上的动态变化.通过对其主要种群类别、生态位宽度和分布格局的描述与测定,反映了演替过程中各种群内部的消长与分布趋势;通过对其优势种群种间联结与生态位重叠的测定,揭示了演替过程中种间关系的相互适应与发展.研究结果表明:群落B处在演替的前期,其阳生性树种与中生性树种的生态位宽度都随演替而增加,并发展为高集群分布格局;群落A处在演替的中期,其强阳性树种消失,阳生性树种生态位宽度锐减,并呈随机分布,而中生性树种宽度继续增大,呈集群分布或保持随机分布.种间联结与生态位重叠也随着演替而出现规律性变化,并因不同种群对生境的不同需求而异.更多还原

【Abstract】 In this paper,population structure dynamics of secondary forest commumty of Baiyunshan in the succession process of six years has been studied.With the description and measurement of niche breadth and pattern of main population,the population quantity change and spreading trend of each population in the succession have been reflected.With the measurement of interspecific association and niche overlap,the adaption and development of interspecific relation have been revealed.The results show that:For the conmmunity in the former stage of succession,both of the niche breadths of heliophytes and mesophytes are widening and turning into intense contagious distribution.As for the community in the middle stage of succession,the pioneer species have died out,the niche breadth of heliophytes also reduces largely and turns into random distribution.However,the nicbe breadth of mesophytes spread further with contagious distrtbution or keeping random distribution.The interspecific association and niche overlap change regularly with conmmunity succession.The change regulations are different with the different niche requirements by various population types.更多还原