Distribution patterns of microfauna (nematodes, rotifers and tardigrades) on nunataks in Dronning Maud Land, East Antarctica
Distribution patterns of microfauna (nematodes, rotifers and tardigrades) on nunataks in Dronning Maud Land, East Antarctica
复制标题
东南极洲 Dronning Maud 地努纳塔克岛上微型动物（线虫、轮虫和缓步动物）的分布模式
DOI：
10.1007/bf02329207
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发表时间：
1996
期刊：
影响因子：
1.7
通讯作者：
A. Hirschfelder
中科院分区：
文献类型：
--
作者：
B. Sohlenius;S. Boström;A. Hirschfelder
在以前的一篇论文中，记录了1991/1992年在东南极Dronning Maud陆地的Nunatak采集的29个样本中线虫、轮虫和迟滞的发生情况。在这项研究中，通过增加的新样本(1993年/1994年)，可以更全面地描述动物的分布，从而使这些研究的总数增加到来自11个努纳塔克的93个土壤样本。该地区记录的物种数量现已从27种增加到34种。Vestfjella和Heimefrontfjella的Nunatak区的种群呈斑块状分布，种类组成不同。在大多数样品中只发现一种或几种线虫或迟发性线虫。特定样本中的轮虫种类从零种到七种不等。大多数样品(76%)存在轮虫，最大密度为750个样品/克干重。线虫的分布受到较大限制。只有4个节肢动物有高密度的线虫，35%的样本有线虫，最大密度为210个标本/克干重。39%的样品存在迟滞，最大密度为580个样品/克干重。一些迟滞物种分布广泛，而另一些只在特定的双节肢动物上发现。对巴森和Fossilryggen两个Nunatak的动物分布格局进行了更详细的研究，结果表明，在两个夏季进行的采样在峰值丰度和物种组成上几乎没有差异。
In a previous paper the occurrence of nematodes, rotifers and tardigrades in 29 samples from nunataks in Dronning Maud Land, East Antarctica taken 1991/1992 was recorded. In this study, a more thorough description of animal distribution is possible by adding 64 new samples (1993/1994), thus increasing the total number from these studies to 93 soil samples from 11 nunataks. The number of species recorded from the area has now increased from 27 to 34. The populations were patchily distributed and the species composition differed between nunatak areas in Vestfjella and Heimefrontfjella. In most samples only one or a few species of nematodes or tardigrades were found. The number of rotifer species in a particular sample varied from nought to seven. Rotifers occurred in most of the samples (76%) with a maximum density of 750 specimens/gram dry weight. The nematode distribution was more restricted. Nematodes were found in high abundance on only four of the nunataks and occurred in 35% of the samples with a maximum density of 210 specimens/gram dry weight. Tardigrades were found in 39% of the samples with a maximum density of 580 specimens/gram dry weight. Some of the tardigrade species were widely distributed, whereas others were found only on specific nunataks. The distribution pattern of the fauna on two of the nunataks, Basen and Fossilryggen, was studied in greater detail and the results showed little difference in peak abundance and species composition between samplings carried out during two southern summer seasons.