云南木兰科新植物

乔木,高18米,胸径65厘米;幼枝密被伏贴锈毛,灰色,平滑。叶革质,倒卵形,倒卵状椭圆形或倒披针形,长27.3—44厘米,宽11—16厘米,顶端急尖或短渐尖,基部狭楔形或阔楔形,两面无毛,上面光亮,深绿色,下面淡绿色;中脉在上面稍凹,在下面显著凸起,侧脉每边13—19条,在上面可见,在下面凸起,小脉成疏网状,干时两面可见,叶柄长3.6—5.7厘米,无毛,基部膨大成圆柱状,托叶痕长于叶柄长的1/2;托叶     

盘星藻属一新变种

二角盘星藻山西变种 新变种 图1Pediastrum duplex var.shanxiensis S.L.Xie,vat.nov.Differt a typo cellulis interiom subquadmta,cellulae lateralium     

异带属绦虫一新种

记述采自福州白颊噪鹛体内的异带属绦虫新一种－噪鹛异带绦虫Ａｎｏｍｏｔａｅｎｉａｇａｒｒｕｋｌａｘ，模式标本保存于厦门大学寄生动物研究室。     

湖南赤爮属一新种

发表了湖南赤瓟属一新种,即湖南赤瓟     

贵州植物区系新纪录

乔木,嫩枝被黄色茸毛,顶芽近于秃净.叶长圆形,膜质,长8—13厘米,宽3.6—4.8厘米;先端锐尖或渐尖;基部圆形,平截或不等侧心形;上面干后黄绿色,除中肋有毛外秃净无毛;下面被黄色星状茸毛;侧脉8—11对,与网脉在上下两面均显著;全     

竹亚科倭竹族的订正

本文计包括以下三节:第一节回顾了倭竹族的研究历史,并对它原有的范畴给予重新划定,扩大和修订了该族原发表时的描述。第二节编制有此族当前已知10个属的分属诠索表。第三节,按发表年代之先后,简明扼要地介绍了这10个属,并各附有它们模式种的绘图,以便识别;此外在本节中也对一些竹种(主要是原在筇竹属之内的种)之学名做了改动,给予新的组合,这样能使它们在自然界的位置更较适宜。最后,我们尝试性地绘制了一幅演化示意图,以表示倭竹族各属之间的亲缘关系及其进化发展路线。     

中国钩顶螽属的新种记述(直翅目:螽蟖总科,草螽科)

记述了采自四川省昭觉地区及云南省昆明市草螽科的钩顶螽属二新种,即凉山钩顶螽 Ruspolia liangshanensis sp.n.和云南指顶螽R.yunnana sp.n.;并报道了该属一新组合种,即印度钩顶螽R.indica(Redtenbacher,1891)Conmb.n.     

A new mechanism of invader success： Exotic plant inhibits natural vegetation restoration by changing soil microbe community

Since the 1950s of the last century, the exotic plant, Eupatorium adenophorum, has spread rapidly across southwest China, damaging native ecosystems and causing great economic losses. We examined the pH, N, P, K, and organic matter concentrations, and the bacterial community character (by Biolog EcoPlateTM) in soils from sites heavily and lightly invaded by this exotic species. Also, soil from the lightly invaded site was treated with a water extract of E.adenophorum roots to examine the effect of the plant on soil properties. We grew three plant species, one native and two exotic, in pot experiment using soil from heavily invaded site to examine the effects of the soil on these plants growth. The soil analysis demonstrated that the pH, organic matter, total N, total P and total K in soils from the heavily invaded site were only slightly different from those of the lightly invaded site, but concentrations of NH4^ , NO3^- and available P and K in the heavily invaded site were greater than those in the lightly invaded site. The catabolic activity of soil bacterial community in the heavily invaded site was different from that in the lightly invaded site. The catabolic activity of bacterial community in soils treated by the water extract of E.adenophorum roots changed and became similar to that in soils from the heavily invaded site. The pot experiment showed that the exotic plants growth in heavily invaded soil were not different from in lightly invaded soil; however, the native plant biomass decreased dramatically when grown in soil from the heavily invaded site as compared to soil from the lightly invaded site; and the same phenomenon was found when any potential allelopathic effects by E. adenophorum were eliminated by added activated carbon to those soils. Difference in soil nutrient availability and allelopathy could not explain this phenomenon of the native plant in the soils from the heavily and lightly invaded sites. Changes observed in the soil bacterial community were obviously related to native plant growth in those tow soils. Those results suggest that changing soil microbial community may be an important part of E. adenophorum invasion process. Since the soil microbial community serves as bridge in connection of exotic and natural plants, the exotic plant could inhibit the natural plant growth and reproduction by changing the soil microbial community in invaded site.