Research on Vegetation Structure and Evolvementof Limestone Mountain in Shandong Province

FANG Yong; DU Ning; WANG Shu-jun; WANG Yue-hai

The area suitab le for p lanting forests in Shandong Prov ince aremostly in limestonemounta in. Because ofits bad env ironmental cond ition, it is d ifficu lt to plant trees in limestonemounta in. W e did researches in 2001 and2005 respectively in order to apply theo ry to vegetation resume in limestonemoun tain. Based on community investiga tion, tw o representat ive limestone mounta in fo rests w ere se lected in Y iyuan and Boshan w hich w ere investigatedtw ice at 2001 and 2005. The land w as div ided into 4 types in both places, and 2~ 6 quadrats w ere placed in everykinds of area types. Then arbor layer ( 20 m × 20 m) , shrub layer ( 3 m × 3m ) and herbage layer ( 3 m × 3 m)w ere investigated separate ly. By means o f spec ies importance value, species diversity, n iche et al. , the eco log icalcharacter istics of vegetation in limestone mounta in were stud ied actually. Accord ing to comparison o f the data in2001 and 2005, w hich stand for the vegeta tion actuality under jamm ing and natural restorat ion actuality under forestenclosing and tending, the vegetation evo lvement w as stud ied of lim estonemounta in in Shandong Prov ince. The resu lts show ed that the actua lity o f limestone mountain in Shandong Prov ince w as comparat ive ly bad; the communitylevels w ere not dist inc.t The dom inant spec ies in shrub and herbage layers w ereVitex negundo andZ oysia jap onica,acco rd ing to fo rest enc losing and tend ing, the dom inant spec ies in shrub and herbage layers d id not change obv ious-ly. The vegeta tion in tw o spots w as in the process of evo lvem en,t but it d id not come to the ex tent o f succession.The cond ition w as better and the evolvement extentw as deeper in Y iyuan than in Boshan. The variety of species d iversity in shrub and herbage layerssw ere not identica,l and it rose of shrub layer in both spo ts. As for herbage layer,it dec lined in Boshan ( from 1. 54 to 1. 09) and rose in Y iyuan ( from 1. 22 to 1. 24). There w as no rule of speciesdiversity a long w ith alt itude. Re la tionships among impo rtance value ( IV ) , n iche breadth (BL) and n iche overlap(Op) in 2001 w ere not prom inen,t but itw as prom inent in 2005, it had the change trend from no linear corre lationto linear corre lation, from linear corre lation to logarithm ic correlation.

1. Sh andong Inst itute of Forest Science, Ji'nan 250014, Shandong, Ch in a

2. College ofL ife Scien ces, Shandong Un ivers ity, Ji? nan 250010, Shandong, Ch in a

Received Date: 2006-12-26

Abstract: The area suitab le for p lanting forests in Shandong Prov ince aremostly in limestonemounta in. Because ofits bad env ironmental cond ition, it is d ifficu lt to plant trees in limestonemounta in. W e did researches in 2001 and2005 respectively in order to apply theo ry to vegetation resume in limestonemoun tain. Based on community investiga tion, tw o representat ive limestone mounta in fo rests w ere se lected in Y iyuan and Boshan w hich w ere investigatedtw ice at 2001 and 2005. The land w as div ided into 4 types in both places, and 2~ 6 quadrats w ere placed in everykinds of area types. Then arbor layer ( 20 m × 20 m) , shrub layer ( 3 m × 3m ) and herbage layer ( 3 m × 3 m)w ere investigated separate ly. By means o f spec ies importance value, species diversity, n iche et al. , the eco log icalcharacter istics of vegetation in limestone mounta in were stud ied actually. Accord ing to comparison o f the data in2001 and 2005, w hich stand for the vegeta tion actuality under jamm ing and natural restorat ion actuality under forestenclosing and tending, the vegetation evo lvement w as stud ied of lim estonemounta in in Shandong Prov ince. The resu lts show ed that the actua lity o f limestone mountain in Shandong Prov ince w as comparat ive ly bad; the communitylevels w ere not dist inc.t The dom inant spec ies in shrub and herbage layers w ereVitex negundo andZ oysia jap onica,acco rd ing to fo rest enc losing and tend ing, the dom inant spec ies in shrub and herbage layers d id not change obv ious-ly. The vegeta tion in tw o spots w as in the process of evo lvem en,t but it d id not come to the ex tent o f succession.The cond ition w as better and the evolvement extentw as deeper in Y iyuan than in Boshan. The variety of species d iversity in shrub and herbage layerssw ere not identica,l and it rose of shrub layer in both spo ts. As for herbage layer,it dec lined in Boshan ( from 1. 54 to 1. 09) and rose in Y iyuan ( from 1. 22 to 1. 24). There w as no rule of speciesdiversity a long w ith alt itude. Re la tionships among impo rtance value ( IV ) , n iche breadth (BL) and n iche overlap(Op) in 2001 w ere not prom inen,t but itw as prom inent in 2005, it had the change trend from no linear corre lationto linear corre lation, from linear corre lation to logarithm ic correlation.

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Research on Vegetation Structure and Evolvementof Limestone Mountain in Shandong Province

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References

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