Interspecific Association among Dominant Populations in Endangered Plant Kmeria septentrionalis Communities
60 arbors plots,30 shrubs and 150 herbaceous patches were set up in the main distribution area of endangered plant Kmeria septentrionalis,Mulun National Nature Reserve of Guangxi province.Based on the 2 × 2 contingency table,a series of approaches includingx2-and W-test,association coefficient (AC) and percentage co-occurrence (PC) were adopted to analyze the interspecific associations among dominant arbor,shrub and herb populations of K.septentrionalis conmunities in the Nature Reserve.The results showed that (1) there was positive association among dominant arbor population,negative association among shrub and herb populations.(2) In thearbor layer,Pterospermum heterophyllum was highly significant positive associated with Loropetalum chinense and Crataegus cuneata ； L.chinense was highly significant positive associated with Styrax suberifolius and C.cuneata ； P.heterophyllum was significantly positive associated with Schefflera octophylla and S.suberiioiia ； L.chinense was significantly positive associated with S.octophylla； S.suberifolius was significantly positive associated with C.cuneata.Mallotus philippinensis was highly significant negative associated with Machilus pingii.P.heterophyllum was significantly negative associated with Diospyros dumetorum； S.suberifolius was significantly negative associated with Machilus pingii ； C.cuneata was significantly negative associated with D.dumetorum； M.philippinensis was significantly negative associated with Daphniphyllum oldhami.(3) In the shrub layer,P.heterophyllum was significantly positive associated with L.chinense.Among of no significantly association,there were 49 positive associations and 47 negative associations.(4) In the herb layer,Polypodium amoenum was highly significant positive associated with Ophiopogon stenophyllum,similar to Amomum villosum and Microstegium vagans.Among of no significantly association,25 species-pairs showed positive association and 43 species-pairs showed negative association.
NETL
NSTL
万方数据
维普
