西部林业科学
西部林業科學
서부임업과학
JOURNAL OF WEST CHINA FORESTRY SCIENCE
2015年
2期
48-53
,共6页
岷江冷杉%伴生种%空间格局%空间关联%点格局分析%王朗自然保护区
岷江冷杉%伴生種%空間格跼%空間關聯%點格跼分析%王朗自然保護區
민강랭삼%반생충%공간격국%공간관련%점격국분석%왕랑자연보호구
Abies faxoniana%companion species%spatial pattern%spatial association%point pattern analysis%Wanglang Nature Reserve
以王朗国家自然保护区原始的岷江冷杉林为研究对象,调查了1 hm2样地的乔木数据,研究了岷江冷杉林乔木层树种的重要值,运用Ripley ’ s K函数分析了岷江冷杉林优势种与主要伴生种的空间格局。结果表明,(1)岷江冷杉在群落中占据绝对优势,紫果云杉、方枝圆柏、桦树和槭树为主要伴生种。(2)5个主要树种的空间格局主要为聚集分布,聚集强度随着尺度增大,先增大后减小或者先增大然后趋于随机分布。(3)岷江冷杉和紫果云杉的空间关系为相互独立;岷江冷杉与方枝圆柏和槭树在小尺度上(分别为8~13 m和2~19 m)表现为显著负相关关系;岷江冷杉和桦树在2~29 m的尺度下呈显著正相关。5个树种的聚集分布特征以及岷江冷杉与4个伴生种空间关联的多样性体现了物种的生物学特性、更新方式和不同的生境需求。结合树种特性、更新机制和空间格局特征,可对群落进行适度的抚育,以维持岷江冷杉林的群落稳定。
以王朗國傢自然保護區原始的岷江冷杉林為研究對象,調查瞭1 hm2樣地的喬木數據,研究瞭岷江冷杉林喬木層樹種的重要值,運用Ripley ’ s K函數分析瞭岷江冷杉林優勢種與主要伴生種的空間格跼。結果錶明,(1)岷江冷杉在群落中佔據絕對優勢,紫果雲杉、方枝圓柏、樺樹和槭樹為主要伴生種。(2)5箇主要樹種的空間格跼主要為聚集分佈,聚集彊度隨著呎度增大,先增大後減小或者先增大然後趨于隨機分佈。(3)岷江冷杉和紫果雲杉的空間關繫為相互獨立;岷江冷杉與方枝圓柏和槭樹在小呎度上(分彆為8~13 m和2~19 m)錶現為顯著負相關關繫;岷江冷杉和樺樹在2~29 m的呎度下呈顯著正相關。5箇樹種的聚集分佈特徵以及岷江冷杉與4箇伴生種空間關聯的多樣性體現瞭物種的生物學特性、更新方式和不同的生境需求。結閤樹種特性、更新機製和空間格跼特徵,可對群落進行適度的撫育,以維持岷江冷杉林的群落穩定。
이왕랑국가자연보호구원시적민강랭삼림위연구대상,조사료1 hm2양지적교목수거,연구료민강랭삼림교목층수충적중요치,운용Ripley ’ s K함수분석료민강랭삼림우세충여주요반생충적공간격국。결과표명,(1)민강랭삼재군락중점거절대우세,자과운삼、방지원백、화수화축수위주요반생충。(2)5개주요수충적공간격국주요위취집분포,취집강도수착척도증대,선증대후감소혹자선증대연후추우수궤분포。(3)민강랭삼화자과운삼적공간관계위상호독립;민강랭삼여방지원백화축수재소척도상(분별위8~13 m화2~19 m)표현위현저부상관관계;민강랭삼화화수재2~29 m적척도하정현저정상관。5개수충적취집분포특정이급민강랭삼여4개반생충공간관련적다양성체현료물충적생물학특성、경신방식화불동적생경수구。결합수충특성、경신궤제화공간격국특정,가대군락진행괄도적무육,이유지민강랭삼림적군락은정。
Based on field survey of a 1 hm2 plot of Abies faxoniana forest in Wanglang Nature Reserve , importance value of tree species in canopy layer was studied , and Ripley’ s K function was also used to analyze spatial pattern and spatial association of dominant and main companion tree species .The result showed that , (1) A.faxoniana was dominant species in the community and Picea purpurea, Sabina saltuaria, Betula spp., and Acer spp.were four main companion species; (2) The five main tree species mainly showed aggregated distribution .As spatial scale in-creased, aggregation intensity tended to increase first and then decreased or tended to be random distribution ; (3) Spatial association between A.faxoniana and P.purpurea was independent at all spatial scales .A.faxoniana and S.saltuaria, A.faxoniana and A.spp.showed significantly negative associations at small scales (8~13 m and 2~19 m, respectively).A.faxoniana and B.spp.was significantly and positively associated at scale 2~29 m.The aggregated distribution of the five species and variety of spatial associations between A.faxoniana and four compan-ion species indicated the biological characteristics , regeneration ways and different habitat requirements . Some measure could be taken to maintain stability of community structure of A.faxoniana forest based on species charac-teristics, regeneration mechanism , and spatial pattern .