期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
浙江檀头山岛周围海域夏、秋季大型底栖动物群落结构特征 被引量:15
1
作者 刘迅 王莉 +4 位作者 顾晓英 蔡林婷 焦海峰 王一农 尤仲杰 《海洋与湖沼》 CAS CSCD 北大核心 2017年第3期553-567,共15页
为揭示现阶段浙江檀头山岛周围海域大型底栖动物群落现状,于2013年7月、2013年11月对该海域进行了2航次的大型底栖动物生态调查,20个采样站位共获得大型底栖动物55种,其中甲壳动物最多,有18种(占32.73%),其次是底栖鱼类(17种,占30.91%)... 为揭示现阶段浙江檀头山岛周围海域大型底栖动物群落现状,于2013年7月、2013年11月对该海域进行了2航次的大型底栖动物生态调查,20个采样站位共获得大型底栖动物55种,其中甲壳动物最多,有18种(占32.73%),其次是底栖鱼类(17种,占30.91%)、软体动物(16种,占29.09%),腔肠动物3种(5.45%),环节动物最少,只有1种(1.82%)。2航次共鉴定大型底栖动物优势种14种,其中葛氏长臂虾Palaemon gravieri、细巧仿对虾Parapenaeopsis tenella为2航次共有优势种,其余均为单一航次优势种,夏、秋季间种类更替率较高,为51.85%。平均生物量、丰度,夏季航次均分别高于秋季航次,方差分析表明生物量、丰度两航次间均存在显著差异(P<0.05),远近岸间均不存在显著差异(P>0.05)。对檀头山岛周围海域夏季和秋季大型底栖动物群落结构进行聚类分析和n MDS排序分析,结果表明,夏季、秋季20个站位均可划分成2个主要聚类组,对各聚类组内平均相似度贡献较大的物种主要是广温、广盐性的甲壳类动物,如东方口虾蛄Oratosquilla oratoria、中国毛虾Acetes chinensis、细螯虾Leptochela gracilis、葛氏长臂虾Palaemon gravieri、中华管鞭虾Solenocera crassicornis、三疣梭子蟹Portunus trituberculatus等。ABC曲线和多样性指数分析表明,檀头山岛周围海域大型底栖动物群落在秋季受到重度扰动,夏季未受到扰动。粒径分析结果显示檀头山岛周围海域沉积物主要是由较细颗粒的黏土和粉砂组成。CCA分析结果表明温度、盐度、水深、溶解氧是对大型底栖动物影响程度较大的环境因子。 展开更多
关键词 群落结构 生物多样性 大型底栖动物 阿氏网 檀头山岛 排序分析
下载PDF
PRELIMINARY STUDY OF OMENTUM TRANSPOSITION TO BRAIN FOR TREATMENT OF ALZHEIMER’S DISEASE
2
作者 仲骏 吴伟烈 Harry Goldsmith 《Journal of Shanghai Second Medical University(Foreign Language Edition)》 2007年第1期46-51,共6页
Objective To learn the effect of omemtum transposition to the brain of patients with Alzheimer’s disease. Methods Ten consecutive patients, aged 58-81 years old, underwent graft of their elongated pedicled omentum on... Objective To learn the effect of omemtum transposition to the brain of patients with Alzheimer’s disease. Methods Ten consecutive patients, aged 58-81 years old, underwent graft of their elongated pedicled omentum onto their left frontal-temperal-parietal cerebral cortex. Those patients, who had more than five years of dementia with low mini mental-state examination (MMSE) scores of 2-15, were diagnosed by a neurologist. All subjects underwent single photon evoked computer tomography (SPECT) pre- and post-operatively. SPECT results were analyzed semi-quantitatively by calculation of the left/right radioactivity counts symmetry index (Si). The patients were followed up to one year. The outcome was evaluated by the neurologist with a modified scale of activities of daily living (mADL) as well as the MMSE. Results Three months following the surgery, the Si of SPECT increased from (98.7±1.9)% to (103.9±2.3)% (P=0.0307). The neurological and neuropsychological testing scores increased insignificantly during the follow-up period. By the one year, the MMSE score rose from 8.7±1.4 to 10.7±1.8(P>0.05), while the mADL from 13.3±1.8 to 16.9±2.0 (P>0.05). One of the patients suffered a heart attack, two had epileptic episodes postoperatively. Conclusion We believe that omental transposition to the brain augments cerebral blood flow, which might be helpful to decelerate the processing of Alzheimer’s disease. However, it is still a potentially risky procedure for the elderly. 展开更多
关键词 Alzheimer's disease cerebral blood flow cerebral hypoperfusion omentum transposition
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部