EFFECT OF ALEXANDRIUM TAMARENSE ON POPULATION DYNAMICS OF BRACHIONUS PLICATILIS

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介绍了福建省力学主要学科的研究进展、主要研究成果及在国民经济建设中的主要应用情况与存在的问题,简单介绍了福建力学学科整体在国内外的地位,展望了我省力学学科发展方向及其在海西建设中的作用

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阐述国内外老年人的备灾现状,老年人应对灾害能力下降,备灾能力较低,应对灾害相关知识和教育缺乏,慢性疾病影响其备灾状态,其获取备灾信息途径和方式单一。提出需建立社区备灾组织、提供..

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1978～2008年中国湿地类型变化

分别基于美国陆地卫星(Landsat MSS/TM/ETM+)和中巴资源卫星(CBERS-02B)影像数据,以人工目视解译为主,完成了中国1978～2008年4期(基准年分别为1978,1990,2000和2008年)湿地遥感制图,并进行了大量的室内外验证.在此基础上,对我国湿地现状及近30年来湿地变化进行了初步分析,得到以下主要结论:(ⅰ)截止2008年,中国湿地面积约为324097km2,其中以内陆沼泽(35%)和湖泊湿地(26%)为主.(ⅱ)1978～2008年,中国湿地面积减少了约33%,而人工湿地增加了约122%.过去30年里湿地减少的速度大幅降低,由最初5523km2/a(1978～1990年)降为831km2/a(2000～2008年).(ⅲ)减少的自然湿地(包括滨海湿地和内陆湿地),其类型变化由湿地向非湿地转化的比例逐渐降低.初期(1978～1990年)几乎全部(98%)转换为非湿地;在1990～2000年间减少的自然湿地约有86%转化为非湿地,而在2000～2008年,这一比例下降为77%.(ⅳ)气候变化和农业活动是中国湿地变化的主要驱动因素,湿地变化在中国分为三大不同特征区域,即西部三省/自治区(西藏、新疆和青海)、北部两省/自治区(黑龙江和内蒙古)和其他省市区.其中西部区域尤其是青藏高原,湿地变化的驱动因子以气候增温为主;新疆湿地由于气候增温和农业活动共同作用造成变化不大.北部省/自治区的湿地变化则主要由农业活动引起;而其他省市区的湿地变化几乎完全受控于人类的农业经济活动

Effects of toxic dinoflagellate Alexandrium tamarense on two unicellular algae

本文研究了塔玛亚历山大藻(ATCI01品系)细胞再悬浮液、细胞破碎液、上清液、藻壳液、过滤液对亚心形扁藻悬浮性的影响,以及塔玛亚历山大藻与亚心形扁藻和小球藻之间的相互作用.结果发现,含有塔玛亚历山大藻成分的实验溶液均能在短时间内造成亚心形扁藻失去鞭毛形成胞囊而下沉,其中再悬浮液的影响最大.但亚心形扁藻受到的这种不利影响,一般在一周后即开始恢复.小球藻生长几乎不受塔玛亚历山大藻的影响,混合培养水体中的小球藻生长曲线与单种培养的几乎一致,其悬浮性也无明显改变.与亚心形扁藻进行混合培养的塔玛亚历山大藻(ATCI01品系和ATHK品系)均表现出培养前期增殖曲线与单种培养类似,但在一周后混合培养的塔玛亚历山大藻的增殖曲线开始下降,这一时间恰好与扁藻细胞密度开始增加的时间相一致.而与小球藻的混合培养的塔玛亚历山大藻在培养前期与单种培养一致,后期则种群数量有所下降.The effects of a toxic dinoflagellate, Alexandrium tamarense (strain ATCI01) on the suspension of Platymonas subcordiformis with its re-suspended cells, broken cells, cell contents, cellular fragments and free-cell medium were investigated, and the interaction in the growth between Alexandrium tamarense and Platymonas subcordiformis or Chlorella sp. was also studied. The results showed that cells of Platymonas subcordiformis cultured in the various treatments above-mentioned lost the flagellums, formed cystsand settled on the bottom of the flasks in short time, and the most obvious effect was observed in the re-suspended cells. However, the negative impact lasted onlya few days, and the cells of Platymonas subcordiformis recovered after a week. There was no obvious change in the growth curves for the suspension of Chlorella sp. whether it was in uni-culture or mixed-culture with Alexandriumtamarense. Moreover, the growth curves of ATCI01 and ATHK in uni-culture or (mixed-culture) with (Platymonas) (subcordiformis) were similar in prophase, but the curves of A. tamarense in mixed-culture declined a week later when the cell density of P.subcordiformis increased gradually. The same phenomina occurred in the A.tamarense culture mixed with Chlorella sp.教育部骨干教师基金资助项目;; 集美大学基金资助项目(C50209

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本书通过对中国藏区的发展、新疆与甘肃的畜牧业综合发展和青海省人与自然和谐发展的三个项目评估报告，结合项目区各少数民族社会和文化现状，探索西部内源发展和文化资本彰显之路