摘要
蚯蚓是典型的大型土壤动物,具有重要的生态功能。运用样方调查方法,于2016年对南泥湾湿地的蚯蚓种类、密度、生境等进行了调查,运用DNA测序技术对蚯蚓种类进行了鉴定,并分析了蚯蚓分布与土壤性质之间的关系。结果表明,发现陆栖蚯蚓3科3属3种,分别为梯形流蚓(Aporrectodea trapezoides)、湖北远盲蚓(Amynthas hupeiensis)和天锡杜拉蚓(Drawida gisti),湖北远盲蚓是优势种;湿地退化区的物种多样性指数高于开垦区,蚯蚓密度夏季高于秋季;影响蚯蚓分布的主要土壤因素是土壤pH值、总有机碳含量和总氮含量,蚯蚓密度与土壤总有机碳含量、总氮含量显著正相关,与pH值显著负相关。蚯蚓生物量与环境因子关系,将有助于定量的预测和评估蚯蚓的生态功能。
Earthworm is one of the typical group of soil macrofauna. The field investigations indicated that the saucer depressions in the Nanniwan wetland, for instance, were the excellent habitats for earthworm. The earth- worm density and species in the saucer depressions were studied by quadrate investigation in 2016. The species of earthworms were identified by DNA sequencing technique. There were 3 species of earthworm in total in the Nanniwan wetland, including Aporrectodea trapezoides, Amynthas hupeiensis, and Drawida gisti. Arnynthas hu- peiensis is the dominant species. The diversity index of the degradation area was higher than that of the reclamation ; earthworm density was higher in summer than those in autumn. Furthermore, soil pH value and total organic carbon content were the main factors to influence earthworm distribution. Density of earthworm was negatively correlated with pH value ; the earthworm biomass positively correlated to the contents of total organic carbon and total nitrogen of the soil. The relationship between earthworm biomass and environmental factors will help to quantitatively predict and evaluate the ecological function of earthworms.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2018年第4期80-84,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(31370541)
陕西省2016年省级大学生创新训练项目(1553)
陕西省自然科学基金项目(2013JM3018)资助
关键词
蚯蚓
环境因子
生物多样性
南泥湾湿地
earthworm
environmental factors
biodiversity
Naniwan wetland
