摘要
为研究小兴安岭天然阔叶红松林群落物种多样性的空间变化效应和林分结构差异,分别对小兴安岭南坡林区的铁力市、大菁山县、五营镇和汤旺河县4处典型天然阔叶红松林的乔木层和灌木层群落结构及其物种多样性进行对比分析。结果表明,4处阔叶红松林群落生物多样性整体较为丰富,但不同种源地在群落结构上存在一定差异,而这种差异并未对其群落子代的种子质量产生影响,这说明树龄过大并不会对种子成熟度产生影响,但树龄与子代质量却呈正相关关系;带岭林业局红松天然林群落最小树龄57 a,最大树龄424 a,为4个群落中树龄跨度最大,平均值最小。由此表明,这一群落正处于天然更新活跃期,群落内种间竞争十分激烈,种子质量明显低于本次观测的其他群落。总体来说,天然阔叶红松林群落物种多样性随不同空间变化具有一定差异,但无明显规律。群落物种多样性高,种类组成复杂,群落乔木层及灌木层各层层次明显。
In order to study the spatial variation effect of species diversity and stand structure difference of natural broad-leaved Korean pine forest in Xiaoxing’an mountains,this paper compared and analyzed the community structure and species diversity of tree layer and shrub layer of four typical natural broad-leaved Korean pine forests in Tieli city,Daqingshan county,Wuying town and Tangwanghe county.The results showed that the biodiversity of the four broad-leaved Korean pine forest communities was relatively rich as a whole,but there were some differences in community structure in different provenances,and this difference did not affect the seed quality of their fallen offspring,which showed that too old trees did not affect the seed maturity,but there was a positive correlation be tween tree age and offspring quality.The minimum tree age of Korean pine natural forest community in Dailing Forestry Bureau was 57 a and the maximum tree age was 424 a,among the four communities,the tree age span was the largest and the mean value was the smallest.The results indicated that this community was in the active period of natural regeneration,the interspecific competition in the community was very fierce,and the seed quality was significantly lower than that of other communities observed this time.In general,the species diversity of natural broad-leaved Korean pine forest community varies with different space,but there is no obvious law.The species diversity of the community is high,the species composition is complex,and the tree layer and shrub layer of the community are obvious.
作者
刘运伟
张巍
LIU Yunwei;ZHANG Wei(Yichun Branch of Heilongjiang Academy of Forestry,Yichun 153000,China)
出处
《森林工程》
北大核心
2022年第1期27-33,共7页
Forest Engineering
基金
国家科技基础资源调查专项(2017FY101302-5)
伊春市科技攻关项目(G2019-4)。
关键词
小兴安岭
红松
天然群落
林分结构
种源差异
物种多样性
Xiaoxing’an mountains
Pinus koraiensis
natural community
stand structure
provenance difference
species diversity
