西南林业大学学报
西南林業大學學報
서남임업대학학보
JOURNAL OF SOUTHWEST FORESTRY COLLEGE
2015年
2期
30-36
,共7页
岷江冷杉%空间格局%空间关联%点格局分析
岷江冷杉%空間格跼%空間關聯%點格跼分析
민강랭삼%공간격국%공간관련%점격국분석
Abies faxoniana%spatial pattern%spatial association%point pattern analysis
以四川王朗国家自然保护区岷江冷杉林1 hm2样地的调查数据为基础，研究岷江冷杉的径级结构和重要值，运用Ripley’s K函数分析其空间格局和种内不同生长阶段的空间关联。结果表明：岷江冷杉在群落中占据绝对优势，中大径级林木较多。不同生长阶段的岷江冷杉主要呈聚集分布，可能与物种种子扩散方式有关；幼树和小树在所有空间尺度上均呈聚集分布，聚集强度随着尺度增大呈增大后减小的趋势，大树的空间格局随尺度增大，由随机（1～3 m）趋于聚集分布（4～50 m）。随着种群发育（幼树→小树→大树），岷江冷杉的聚集强度逐渐减小。幼树与小树在中小尺度上（1～25 m）呈正向关联，不同生长阶段的岷江冷杉均与枯立木呈现出正向关联，随尺度变化而变化；岷江冷杉的聚集分布和种内的正向关联关系体现出了种群的生物学特性（耐荫）、干扰机制（林窗更新）和物种内部相互有利的生态关系。根据岷江冷杉的空间属性和更新机制，可以适当的进行人为干扰，以促进岷江冷杉林的发展。
以四川王朗國傢自然保護區岷江冷杉林1 hm2樣地的調查數據為基礎，研究岷江冷杉的徑級結構和重要值，運用Ripley’s K函數分析其空間格跼和種內不同生長階段的空間關聯。結果錶明：岷江冷杉在群落中佔據絕對優勢，中大徑級林木較多。不同生長階段的岷江冷杉主要呈聚集分佈，可能與物種種子擴散方式有關；幼樹和小樹在所有空間呎度上均呈聚集分佈，聚集彊度隨著呎度增大呈增大後減小的趨勢，大樹的空間格跼隨呎度增大，由隨機（1～3 m）趨于聚集分佈（4～50 m）。隨著種群髮育（幼樹→小樹→大樹），岷江冷杉的聚集彊度逐漸減小。幼樹與小樹在中小呎度上（1～25 m）呈正嚮關聯，不同生長階段的岷江冷杉均與枯立木呈現齣正嚮關聯，隨呎度變化而變化；岷江冷杉的聚集分佈和種內的正嚮關聯關繫體現齣瞭種群的生物學特性（耐蔭）、榦擾機製（林窗更新）和物種內部相互有利的生態關繫。根據岷江冷杉的空間屬性和更新機製，可以適噹的進行人為榦擾，以促進岷江冷杉林的髮展。
이사천왕랑국가자연보호구민강랭삼림1 hm2양지적조사수거위기출，연구민강랭삼적경급결구화중요치，운용Ripley’s K함수분석기공간격국화충내불동생장계단적공간관련。결과표명：민강랭삼재군락중점거절대우세，중대경급림목교다。불동생장계단적민강랭삼주요정취집분포，가능여물충충자확산방식유관；유수화소수재소유공간척도상균정취집분포，취집강도수착척도증대정증대후감소적추세，대수적공간격국수척도증대，유수궤（1～3 m）추우취집분포（4～50 m）。수착충군발육（유수→소수→대수），민강랭삼적취집강도축점감소。유수여소수재중소척도상（1～25 m）정정향관련，불동생장계단적민강랭삼균여고립목정현출정향관련，수척도변화이변화；민강랭삼적취집분포화충내적정향관련관계체현출료충군적생물학특성（내음）、간우궤제（림창경신）화물충내부상호유리적생태관계。근거민강랭삼적공간속성화경신궤제，가이괄당적진행인위간우，이촉진민강랭삼림적발전。
A studied diameter distribution and importance value of Abies faxoniana was made based on the field survey in a plot with an area of a 1 hm2 of A.faxoniana forest in Wanglang Natural Reserve,Sichuan Province.In the study Ripley’s K function was used to analyze spatial pattern and spatial association of A.faxoniana at different growth stages.The result showed that:A.faxoniana was dominant species in the community with highest impor-tance value,and there were many medium and big trees in the plot.A.faxoniana at different growth stages mainly showed aggregated distribution,indicating the way of seedling dispersal.Saplings and small trees were aggregated distributed at all scales,and aggregation intensity tended to increase first and then decreased as scale increased. While big trees tended to be clumped as scale increased.As age increase (sapling→small tree→big tree),aggrega-tion intensity tended to reduce.Saplings and small trees showed positive association,while A.faxoniana at all growth stages were positively associated with standing dead trees,varied with spatial scale.The spatial pattern and association of A.faxoniana indicated the species′shade-tolerance characteristic,positive relationship among age classes,and mechanism of gap disturbance affecting regeneration.Based on its spatial character and regeneration mechanism,it is suggested that some measures can be taken to facilitate the development of A.faxoniana.
