The responses of morphological variation of Keratella cochlearis to environmental changes
LIU Lu1,2, LIANG Di-wen1, YANG Yu-feng1,2, JIN Ding1, YE Xiao-tong1, WANG Qing1,2
1. Institute of Hydrobiology, Jinan University, Guangzhou 510632, China; 2. Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China
Abstract:In this study, to measure and analyze the morphometric parameters of K.cochlearis, 14sites were selected in Nan'ao Island, Guangdong Province and Changde city, Hunan Province with different water trophic statuses from mesotrophic to moderate-eutrophic. Samples were collected quarterly from July 2015 to December 2018. The results showed that the water temperature was the most important factor affecting the morphological changes of K.cochlearis and had a significant negative correlation with lorica length, lorica width and spine length (P<0.01). There were significant differences in morphometric parameters of K.cochlearis in different latitudes, with individuals from Changde area being significantly larger than those in Nan'ao (P<0.05). There were also significant seasonal changes in the morphology of K.cochlearis, and the morphological parameters of this species showed different pattern between summer-autumn and winter-spring. The length of the posterior spines of K.cochlearis decreased with the increased of nutrient loading (F=159.4, P<0.01), and the ratio of the length of the posterior spines to the total length of rotifer decreased under eutrophic condition (F=167.5, P<0.01). The results showed that the spine length of K.cochlearis can be used as a biological monitoring index of water quality, and provided an important reference for the study of global warming.
刘璐, 梁迪文, 杨宇峰, 金鼎, 叶晓彤, 王庆. 螺形龟甲轮虫形态结构对环境变化的响应[J]. 中国环境科学, 2021, 41(11): 5326-5333.
LIU Lu, LIANG Di-wen, YANG Yu-feng, JIN Ding, YE Xiao-tong, WANG Qing. The responses of morphological variation of Keratella cochlearis to environmental changes. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(11): 5326-5333.
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