Results 121 to 130 of about 3,902 (201)

洪湖野鸭越冬种群的数量调查

野生动物学报, 1990
本文是7年对洪湖越冬野鸭的群落结构变化的研究结果;在洪湖统计捕获的野鸭有12种隶属于3属,野鸭个体密度大部分逐年下降,多样性指数和均匀性指数也趋向降低,七年平均11月至翌年3月野鸭个体密度,以12月和1月最大,11月和3月最小,野鸭一般9月迁来洪湖,翌年4月迁离。越冬野鸭多以集群方式活动,也常与骨顶鸡混合成群。鸟类的群落结构研究已在国内外有不少报导,本文是1981—1987年对洪湖越冬野鸭的种类、种群数量变化进行了调查和分析,对评价生态环境质量和合理利用水禽资源都有一定意义。一 ...
李承龄, 江永生
doaj  

[Construction of the evaluation index system for nursing quality management in outpatient dental clinics based on the structure-process-outcome model]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Wei J, Liu F, Yang C, Wang J, Ma Y, Yang J, Xie J, Xu L.   +7 more
europepmc   +1 more source

间作槟榔调控咖啡根际微生物群落结构及功能促进咖啡植株发育

Scientia Sinica Vitae
Shaoguan Zhao, Ang Zhang, Yunping Dong, Yan Sun, Lanxi Su, Xin-xin Lin, Yuzhou Long, Qingyun Zhao   +7 more
semanticscholar   +1 more source

[Effects and Mechanisms of Yangyin Yiqi Huoxue Formula on the Oral Microecology in Sjögren's Syndrome Model Mice]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Wu F, Lu W, Wu D, Zhou Y, Lu H, Ying L, Wu G.   +6 more
europepmc   +1 more source

[Advances in the Application of Forensic Microbiome Analysis in Tissue Source Inference]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yao H, Sun C, Wang S, Zhou Y, Zhang Z, Song F, Luo H.   +6 more
europepmc   +1 more source

[Development and validation of a risk prediction model for cognitive impairment in rural elderly Chinese populations: evidence from the CHARLS study]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wang F, Li W, Shang X, Li F.
europepmc   +1 more source

[Network analysis of insomnia, anxiety, depression, and non-suicidal self-injury in adolescents]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Xi C, Zeng C, Zhang A, Zeng Y, Zeng C.
europepmc   +1 more source

[Archaeological Research on Periodontal Disease]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Zhou X, Zhou J.
europepmc   +1 more source

[Neurodevelopmental outcomes in different types of neonatal stroke]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Miao JW, Song J, Zhang YH, Zhang XL, Yang LX, Wang YB, Zhu Y.   +6 more
europepmc   +1 more source

[Characteristics of bronchoalveolar lavage fluid microbial distribution at different disease stages and its relationship with immune function in children with refractory <i>Mycoplasma pneumoniae</i> pneumonia]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Yao C, Zhang X, Xu R.
europepmc   +1 more source