地下洞道生境下高原鼢鼠血液特征  

Blood Properties of Plateau Zokor in Underground Burrow Conditions

作　　者：张佳钰 高聪慧 李吉梅 安志芳 王志洁 陈晓琦 魏登邦 ZHANG Jiayu;GAO Conghui;LI Jimei;AN Zhifang;WANG Zhijie;CHEN Xiaoqi;WEI Dengbang(College of Ecological Environment Engineering,Qinghai University,Xining,810016,China;State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining,810016,China)

机构地区：[1]青海大学生态环境工程学院,西宁810016 [2]青海大学省部共建三江源生态与高原农牧业国家重点实验室,西宁810016

出　　处：《野生动物学报》2024年第2期298-304,共7页CHINESE JOURNAL OF WILDLIFE

基　　金：青海省自然科学基金项目(2021-ZJ-904)。

摘　　要：高原鼢鼠(Eospalax baileyi)是青藏高原特有的地下啮齿动物,终生生活在封闭的地下洞道中,对地下洞道严重缺氧生境有很强的适应性。为了探究高原鼢鼠适应严重缺氧地下生境的策略,在高原鼢鼠的生境现场,测定高原鼢鼠洞道O_(2)、CO_(2)的体积分数和质量浓度,同时测定不同海拔与模拟地下洞道气体体积分数条件下高原鼢鼠的血液参数,并进行比较分析。结果表明:与大气相比,不同海拔高原鼢鼠洞道中O_(2)体积分数和质量浓度均显著下降,而CO_(2)体积分数和质量浓度均显著增加;与海拔2700 m的高原鼢鼠洞道相比,海拔3700 m的高原鼢鼠洞道中O_(2)体积分数和质量浓度显著下降,CO_(2)体积分数和质量浓度显著上升。洞道气体模拟组和3700 m组的高原鼢鼠血常规参数无显著差异;2700 m组高原鼢鼠的红细胞(RBC)、血红蛋白(Hb)和红细胞压积(HCT)的数目均显著低于3700 m组,平均红细胞体积(MCV)显著高于3700 m组。2700 m组高原鼢鼠动脉血氧分压(PaO_(2))显著高于3700 m组和洞道气体模拟组;洞道气体模拟组高原鼢鼠动脉血二氧化碳分压(PaCO_(2))与2700 m组无显著差异,但显著高于3700 m组;洞道气体模拟组高原鼢鼠动脉血氧饱和度(SaO_(2))显著低于3700 m组和2700 m组;动脉血pH在3组间无显著差异。上述结果提示,高原鼢鼠在低氧状态时表现出低PaO_(2)、PaCO_(2)和SaO_(2)水平,增加血液中红细胞数目和减小红细胞体积,使其具有更强的血氧利用率,对地下洞道严重缺氧生境有较强的适应能力。The plateau zokor(Eospalax baileyi)is a unique underground rodent found in the Qinghai-Xizang Plateau.It lives in closed underground tunnels throughout its life and has strong adaptability to environments with severe hypoxia in underground tunnels.In order to explore the adaptation strategies of plateau zokors to the severe hypoxia underground habitats,the volume fraction and mass concentration of O_(2) and CO_(2) in the tunnel of plateau zokors were measured at the habitat site.At the same time,the blood parameters of plateau zokors were also measured at different altitudes and simulated underground tunnel gas volume fraction conditions.The results showed that,compared with the atmosphere,the volume fraction and mass concentration of O_(2) in zokor burrows at different altitudes decreased significantly,while the volume fraction and mass concentration of CO_(2) increased significantly.Compared with the altitude of 2,700 m,the O_(2) volume fraction and mass concentration in the plateau zokor tunnel at altitude of 3,700 m were significantly decreased,and the CO_(2) volume fraction and mass concentration were significantly increased.There was no significant difference in blood routine parameters of plateau zokor between the burrows gas simulation group and the 3,700 m group.The red blood corpuscle(RBC),hemoglobin(Hb),and hematocrit(HCT)of plateau zokors in 2,700 m group were significantly lower than those in 3,700 m group,while the mean corpuscular volume(MCV)was significantly higher than that in 3,700 m group.Arterial partial pressure of oxygen(PaO_(2))in 2,700 m group was significantly higher than that of 3,700 m group and burrows gas simulation group.Arterial blood partial pressure of carbon dioxide(PaCO_(2))was not significantly different between the burrows gas simulation group and 2,700 m group,but was significantly higher than that in 3,700 m group.Arterial oxygen saturation(SaO_(2))of plateau zokors in burrows gas simulation group was significantly lower than that in 3,700 m and 2,700 m groups.There was no s

关 键 词：高原动物 高原鼢鼠 地下洞道 低氧状态 血液参数 血氧利用率 血气 

分 类 号：Q494[生物学—生理学]