CAJ | 학술논문

为研究植物残体干扰对黄河河口高潮滩盐沼芦苇生长的影响,在黄河河口高潮滩盐沼中分别选择典型的植物残体干扰斑块和未受干扰的自然群落,调查了其中芦苇(Phragmites australis)的形态特征及其种群的密度和生物量,并取样测定了土壤盐度、含水量、容重等土壤物理、化学性质,运用方差分析方法研究了植物残体干扰对芦苇的形态特征及其种群的密度和生物量的影响以及对土壤性质的影响.结果表明,植物残体干扰斑块中芦苇种群的密度、生物量等明显高于未受干扰的自然群落,芦苇的形态特征也明显优于未受干扰的自然群落.这说明植物残体干扰对芦苇生长产生了明显的促进作用.在植物残体干扰斑块中,土壤盐度、容重显著低于自然群落,说明植物残体干扰对黄河河口高潮滩盐沼芦苇的生长起到的促进作用,可能是通过改善土壤环境,缓解物理胁迫而产生的.
위연구식물잔체간우대황하하구고조탄염소호위생장적영향,재황하하구고조탄염소중분별선택전형적식물잔체간우반괴화미수간우적자연군락,조사료기중호위(Phragmites australis)적형태특정급기충군적밀도화생물량,병취양측정료토양염도、함수량、용중등토양물리、화학성질,운용방차분석방법연구료식물잔체간우대호위적형태특정급기충군적밀도화생물량적영향이급대토양성질적영향.결과표명,식물잔체간우반괴중호위충군적밀도、생물량등명현고우미수간우적자연군락,호위적형태특정야명현우우미수간우적자연군락.저설명식물잔체간우대호위생장산생료명현적촉진작용.재식물잔체간우반괴중,토양염도、용중현저저우자연군락,설명식물잔체간우대황하하구고조탄염소호위적생장기도적촉진작용,가능시통과개선토양배경,완해물리협박이산생적.
In this paper, the role of wrack disturbance in mediating P.australis growth in a high salt marsh in the Yellow River Estuary, China, was investigated. P.australis density, biomass and morphology traits (stem height, basal area, number of green leaves, leaf length, leaf width and leaf area) were measured in typical patches of wrack disturbance and in natural communities. Soil cores were collected from these two habitats, and soil salinity, water content and bulk density were determined in laboratory. A series of ANOVAs were conducted to test differences in performances of P.australis and edaphic factors between the two habitats. Both P.australis density and biomass were significantly higher in patches of wrack disturbance than those in natural communities, and stem height, basal area, number of green leaves, leaf length, leaf width and leaf area of P.australis were significantly larger in patches of wrack disturbance than those in natural communities, indicating facilitative effects of wrack disturbance on P.australis growth. Soil salinity and bulk density were significantly lower in patches of wrack disturbance than those in natural communities, indicating that wrack disturbance may facilitate P.australis growth through alleviating physical stresses. These data suggest that wrack disturbance play a facilitative role in mediating P.australis growth in high marshes in the Yellow River Estuary, China. This finding is consistent with several previous studies while differ from a few others in other salt marsh sites. As suggested previously, one reason for the variations in the role of wrack disturbance among sites is probably that physical environment, such as climate-induced salinity patterns, varies among sites. In future studies, the precise mechanisms of mediations of wrack disturbances and how wrack disturbances interact with other environmental factors should be investigated to improve our understanding of marsh plant organization.