| 怀孕期高原鼢鼠生物学特征与环境因子的关系分析 |
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| 引用本文： | 周延山,花立民,楚彬,马素洁,刘丽,田永亮.怀孕期高原鼢鼠生物学特征与环境因子的关系分析[J].草原与草坪,2016(6):16-22. |
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| 作者姓名： | 周延山 花立民 楚彬 马素洁 刘丽 田永亮 |
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| 作者单位： | 1. 甘肃农业大学 草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃 兰州,730070;2. 甘肃农业大学 工学院,甘肃 兰州,730070 |
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| 基金项目： | 国家自然科学基金项目(31460635)，农业部公益性行业科研项目(201203041) |
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| 摘 要： | 选择甘肃天祝县高原鼢鼠(Mospalax baileyi)2个地理位置不同的栖息地为研究区,以高原鼢鼠体重、胎数、妊娠率和种群密度作为其生物学特征指标,以2011~2013年归一化植被指数(NDVI)、年均降水量和年均温度为环境因子,分析二者的相关关系。结果表明:2个研究区域NDVI存在显著性差异(P0.05);除了2011年和2013年雌性体重存在差异外,2个区域高原鼢鼠体重、妊娠率、平均胎数和种群密度均无显著性差异(P0.05);雌雄个体重和平均胎数与NDVI呈负相关关系,妊娠率和种群密度与NDVI呈正相关关系;雄性个体重、胎数和种群密度与年均温呈负相关关系,雌性个体重和妊娠率与年均温呈正相关关系;雄性个体重、妊娠率、胎数和种群密度与年均降水量呈正相关关系,雌性个体重与年均降水量呈负相关关系,但高原鼢鼠各生物学指标与环境因子相关性均不显著(P0.05)。说明,高原鼢鼠体重、妊娠率、胎数和种群密度的变化与栖息地环境因子没有直接关系,生物学特征受环境因子的影响较小。
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| 关 键 词： | 高原鼢鼠 归一化植被指数 气候因子 繁殖特性 种群密度 |
The relationship between biological characteristics of plateau zokor and environmental factors during pregnancy period |
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| Abstract: | The plateau zokor (Myospalax baileyi )is one of the dominant rodent species in Qinghai-Tibet Plateau and play an important role in alpine grassland ecosystem.This research selected two zokors habitants with differennt population densities in Tianzhu County as the studying area,choosed bodyweight and reproduc-tive characteristics and population density of plateau zokor as its biological characteristics,as will as choosed the normal difference vegetation(NDVI),annual average precipitation and temperature as the eneironmental factors from 201 1 to 2013.We analyzed the relationship between biological characteristics of plateau zokor and the envi-ronmental factors.The results showed that there was an significant difference in NDVI between two sampling sites from 201 1 to 2013 (P <0.05).there was no significant difference in the male bodyweight,pregnancy rate, mean litter size,population density except females bodyweight between two sampling sites from 2008~2014(P>0.05).The femal and male bodyweight,and mean litter size had the negitive correlation with NDVI,the preg-nancy rate and population density had the positive correlation with NDVI.The male bodyweight,mean litter size,and population density had the negative correlation with the annual average temperature,the femal body-weight and pregnancy rate had the postive correlation with the annual average temperature.The male body-weight,pregnancy rate,mean litter size,and population density had the postive correlation with the annual aver-age precipitation,the female bodyweight had the negative correlation with the annual average precipitation.All the biological characteristics had no significant correlation with the eneironmental factors (P >0.05).In conclu-sion,the changes of bodyweight,pregnancy rate,mean litter size,population density of the zokor did not inful-enced by their habitat condition. |
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| Keywords: | plateau zokor normal difference vegetation climatic factors reproductive characteristics popula-tion dengsity |
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