CAJ | 학술논문

物种间区域分布与局域多度之间的正相关关系是宏生态学的经典模式之一，即局域高密度的物种地理分布范围广，而局域低密度的物种地理分布范围较窄。这种模式在不同的大型生物类群中得到了广泛的证实。但是微生物群落的相关研究还比较薄弱，并且已有工作主要集中在水体环境中。本文以内蒙古草地土壤细菌为研究对象，在3个不同的空间尺度上采集土壤样品，探讨土壤细菌区域分布与局域多度之间的关系。结果表明，在不同的地理尺度上，土壤细菌区域分布与局域多度之间均呈现显著的正相关关系，二者之间的相关性随分类阶元的降低而有所减弱。该结果暗示细菌群落中常见种和稀有种的多样性维持机制可能存在差异，生态位和中性过程可能同时在起作用。
물충간구역분포여국역다도지간적정상관관계시굉생태학적경전모식지일，즉국역고밀도적물충지리분포범위엄，이국역저밀도적물충지리분포범위교착。저충모식재불동적대형생물류군중득도료엄범적증실。단시미생물군락적상관연구환비교박약，병차이유공작주요집중재수체배경중。본문이내몽고초지토양세균위연구대상，재3개불동적공간척도상채집토양양품，탐토토양세균구역분포여국역다도지간적관계。결과표명，재불동적지리척도상，토양세균구역분포여국역다도지간균정현현저적정상관관계，이자지간적상관성수분류계원적강저이유소감약。해결과암시세균군락중상견충화희유충적다양성유지궤제가능존재차이，생태위화중성과정가능동시재기작용。
Positive interspecific relationship between regional distribution and local abundance is a classic macroecological pattern.Widespread species are likely to occur at high densities whereas species restricted in their distribution tend to be scarce.This pattern has been widely demonstrated in various macroorganisms. However,such studies in microorganisms are still rare,most of which focus on aquatic ecosystems.In the present work a field survey was implemented to analyze the relationship between soil bacteria regional distribution and local abundance on three different geographic scales in Inner Mongolia grassland.Significant positive relationships between soil bacteria regional distribution and local abundance were observed at all geographic scales,and the corresponding relationships became weaker with increased taxonomic resolution for bacteria.These data suggest that abundant and rare soil bacteria may have different mechanisms to maintain biodiversity.Niche and neutral process may play important roles simultaneously.