Tripathi G, Bhardwaj P
Department of Zoology, J.N.V. University, Jodhpur-342 001, India.
J Environ Biol. 2004 Apr;25(2):221-6.
Studies were conducted on population dynamics of Metaphire posthuma, Lampito mauritii and Dichogaster bolaui in cultivated pedoecosystem of desert region of Rajasthan. The populations of aclitellate and clitellate M. posthuma, L. mauritii and D. bolaui were maximum in rainy season and minimum in summer season. The abundant population of these worms were found during the months of July to October. The species M. posthuma breed throughout the year except in extreme summer but L. mauritii breed twice in a year in the field. However, D. bolaui breed once in a year. Among these earthworm species D. bolaui with relative density of 44.2% was the most dominant species in cultivated land while L. mauritii and M. posthuma contributed 33.3% and 22.5% of density, respectively. The total population of earthworms showed significant positive correlation with different soil nutrients.
对拉贾斯坦邦沙漠地区耕作土壤生态系统中的参状远盲蚓、莫氏巨蚓和博氏双胸蚓的种群动态进行了研究。无环带和有环带的参状远盲蚓、莫氏巨蚓和博氏双胸蚓的种群数量在雨季最多，在夏季最少。在7月至10月期间发现这些蚯蚓数量丰富。参状远盲蚓除了在酷热的夏季外全年均可繁殖，但莫氏巨蚓在田间一年繁殖两次。然而，博氏双胸蚓一年繁殖一次。在这些蚯蚓物种中，相对密度为44.2%的博氏双胸蚓是耕地中最优势的物种，而莫氏巨蚓和参状远盲蚓的密度分别占33.3%和22.5%。蚯蚓的总种群数量与不同的土壤养分呈显著正相关。
