典型石漠化区不同植被表土孢粉组合的生态指示意义

The EcologicalIndication on TopsoilSpore-pollen Assem blagesofDifferentVegetation Typesin the Typica

  • 摘要: 通过对南平4个不同植被类型的表土样品的孢粉分析,得出了该区的表土孢粉组合特征.结果显示:研究区内的表土孢粉组合中草本植物占据优势,乔木主要为马尾松,灌木的种类和数量都很少,显示该区植被退化严重,表现出石漠化地区孢粉组合的显著特点.研究区内不同植被类型的表土孢粉组合差别明显,但与其相应的实际植被情况大致相同,能够较好地反映出石漠化地区现代植被的基本状况.表土孢粉组合中有很多喜钙性、旱生性、石生性植物,对生态恢复和重建有很好的指示意义,为该区恢复和重建自然生态环境提供参考性依据

     

    Abstract: By analysisofthesurfacespore-pollensamplesoffive differenttypesofvegetation of Nanping , thesur facesoilspore-pollen assemblagecharacteristicsinthearea wereobtained. Theresultsshowedthatthespore-pollen as-semblageinstudy area was dominated by herbaceous plants. Trees are mainly of Pinus massoniana Lamb , andthetypesand quantitiesofshrubsare verysmall , indicating aserious degradation oflocalvegetation. The desertificationareasshow a distinctivefeatureofspore-pollen assemblage. Spore-pollen assemblageofsurfacesoilin differentvegeta-tiontypes wassignificantly different , buttheactualvegetation anditscorrespondingroughlythesame , whichreflectthemodern vegetationin desertification areasthe basicsituation. Surfacespore-pollen assemblage hasalotofhi-lime , dryby nature , stoneendogenousplants , which wasa goodindicationtothe ecologicalrestoration andreconstruction , andprovided an evidencefortherehabilitation andreconstruction ofnaturalenvironmentofthe area.

     

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