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首页> 外文期刊>Acta amazonica >PRELIMINARY RESULTS OF A LARGE-SCALE TREE INVENTORY OF UPLAND RAIN FOREST IN THE CENTRAL AMAZON
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PRELIMINARY RESULTS OF A LARGE-SCALE TREE INVENTORY OF UPLAND RAIN FOREST IN THE CENTRAL AMAZON

机译：中央亚马逊山地雨林大型树调查的初步结果

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A large-scale inventory of trees 10cm DBH was conducted in the upland "terra firme" rain forest of the Distrito Agropecuário da SUFRAMA (Manaus Free Zone Authority Agricultural District) approximately 65Km north of the city of Manaus (AM), Srasil. Thegeneral appearance and structure of the forest is described together with local topography and soil texture. Thepreliminary results of the Inventory provide a minimum estimate of 698 tree species in 53 families in the 40Km radius sampled, including 17 undescribed species. Themost numerically abundant families, Lecythidaceae, Leguminosae, 5apotaceae and Burseraceae as also among the most species rich families. One aspect of this diverse assemblage is the proliferation of species within certain genera, Including 26 genera In 17 families with 6 or more species or morphospecies. Most species have very low abundances of less than 1 tree per hectare. While more abundant species do exist at densities ranging up to a mean of 12 trees per ha, many have clumped distributions leading to great variation in local species abundance. The degree of similarity between hectare samples based int the Coefficient of Community similarity Index varies widely over different sample hectares for five ecologically different families. Soil texture apparently plays a significant role In determining species composition in the different one hectare plots examined while results for other variable were less consistent. Greater differences in similarity indices are found for comparisons with a one hectare sample within the same formation approximately 40Km to the south. It is concluded that homogeneity of tree community composition within this single large and diverse yet continuous upland forest formation can not be assumed.
机译：在Srasil的Manaus（AM）市以北约65公里的DistritoAgropecuárioda SUFRAMA（马瑙斯自由区管理局农业区）的高地“硬土地”雨林中进行了大树> 10cm DBH的调查。描述了森林的一般外观和结构，以及局部地形和土壤质地。清单的初步结果提供了在40Km半径范围内对53个科的698种树种的最小估计，其中包括17种未描述的树种。数量最多的科是鳞翅目科，豆科，豆科5科和豆科，也是物种最多的科。这种多样化组合的一个方面是某些属内物种的繁殖，包括17个具有6个或更多物种或形态物种的科中的26个属。大多数物种的丰度非常低，每公顷不到一棵树。尽管确实存在着更丰富的物种，其密度高达每公顷平均12棵树，但许多物种的分布结块，导致当地物种的丰度发生了巨大变化。基于社区相似系数的公顷样本之间的相似度，在五个生态上不同的家庭的不同样本公顷上差异很大。在不同的一公顷土地上，土壤质地显然在决定物种组成方面起着重要作用，而其他变量的结果则不一致。发现相似指数更大的差异是为了与同一地层以南约40公里的一公顷样品进行比较。得出的结论是，不能假设这种单一的大片多样而连续的山地森林形成中树木群落组成的同质性。

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