Finding the host tree species of Notiobia nebrioides Perty (Coleoptera,Carabidae), a member of the seed-feeding guild at fruit falls in Amazonian non-inundated lowland rainforest

Feeding on very small seeds at tree fruit falls is a recently discovered adaptation of ground beetles living in tropical lowland rainforests. A seed-feeding guild of eight species of the genus Notiobia is known from fig fruit falls at a terra firme rainforest near Manaus (Central Amazonia). Only two of these species also reproduce at fig fruit falls. The remaining six species use fig fruit falls as 'stepping-stones' when migrating between the more seasonally restricted fruit falls of their host tree species. Four species are known to feed and reproduce at fruit falls of the Melastomataceae genera Bellucia, Loreya and Miconia. One of the remaining species, N. disparilis is only known from four specimens and the host tree species where it reproduces is still unknown. The sixth species, N. nebrioides, appears in comparatively high numbers at both fig and Melastomataceae fruit falls but does not reproduce there. In this study we looked for its host tree species and found it to be the most abundant carabid beetle at fruit falls of Coussapoa asperifolia (Cecropiaceae) and Vismia guianensis (Clusiaceae) and to reproduce there. Recently, Arndt and Kirmse (in press) found N. nebrioides reproducing at fruit falls of Goupia glabra (Celestraceae) in south Venezuela. So N. nebrioides seems to be the most pronounced generalist among the seed-feeding ground beetles in Amazonian non-inundated lowland rainforests, reproducing at fruit falls of trees belonging to three different families.     

数学认知结构与数学学习

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“-friendly”复合词的结构、语义和翻译策略

近年来,＂-friendly＂复合词的数量越来越大,词内结构越来越复杂,＂-friendly＂词义延伸也越来越广。在大量语料的基础上,对＂-friendly＂复合词的构词结构、语义特征以及翻译策略进行讨论,概括出目前此类复合词的四类结构和四个语义特征,并总结出四种翻译策略。最后,对其发展前景做出预测。     

澳大利亚26.5t轴重窄轨控制型转向架研制

介绍了轴重26.5 t窄轨控制型转向架的结构特点、主要技术参数及出口项目研发经验。     

Dawson结构钼钒磷杂多化合物的性质

合成了具有Ｄａｗｓｏｎ结构的钼钒磷杂多酸，并将其转变为相应的十六烷基吡啶盐，利用ＩＲ，ＣＶ，３１ＰＮＭＲ，ＵＶ等手段进行表征．讨论了钒取代后杂多化合物的结构特征．     

大屏幕指针式石英塔钟单片微机掉电保护电路的研究

本文分析了大屏幕指针式石英塔钟复位失控的原因，采取二种措施，设计了保护电路，对塔钟自动控制系统的单片微机掉电保护进行了研究。     

元素的结构分析与元素周期律的不规则性

本文通过对元素周期系中,各元素的结构分析,很方便地找到了对元素的不规则性的解释。     

江西玉山县王家坝晚奥陶世三衢山组点礁发育特征及其群落研究

本文研究了玉山王家坝晚奥陶世三衢山组的点礁,描记了三个生物群落:Sibiriolites jiangxiensis群落,Fletcheriella grandis-Pachystylostroma群落和Trocholites-Encrinuroides群落.依据造礁功能的不同,作者还简述了组成点礁的各种生物群团.     

关于多维随机过程的NBU性质

定义多维道增随机过程寿命的各种ＮＢＵ分布类，导出它们之间的关系及某些封闭性质；特别是动态刻划了系统寿命的ＮＢＵ特征及性质。进一步给出相互独立情形的某些结果。     

图形符号的三种编码剖析

从图形符号的结构分析入手,重点论述了 ASCII 码、HEX 机内码及区位码的编码原理,从而确定了三种编码的关系,最后通过程序具体实现了三种码值在机内的获取方法。