The ecology of chytrids in aquatic ecosystems: roles in food web dynamics
The ecology of chytrids in aquatic ecosystems: roles in food web dynamics
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DOI：
10.1016/j.fbr.2008.02.001
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发表时间：
2008-02-01
影响因子：
6
通讯作者：
Sime-Ngando, Telesphore
中科院分区：
文献类型：
--
作者：
Gleason, Frank H.;Kagami, Maiko;Sime-Ngando, Telesphore
壶菌是淡水生态系统的重要组成部分，但其生态意义尚不清楚。本文综述了水生生境中影响壶菌生长和种群组成的一些重要环境因素。物理因素主要包括盐度、溶解氧浓度和温度。生物学因素包括壶菌作为物种和寄生虫的作用以及繁殖体在整个生态系统中的传播方法。传播依赖于游动孢子的短距离传播和整个菌体的长距离传播。壶菌在食物网动力学中的作用有五种：(1)壶菌游动孢子是浮游动物的良好食物来源；(2)壶菌分解有机物颗粒；(3)壶菌是水生植物的寄生虫；(4)壶菌是水生动物的寄生虫；(5)壶菌将无机化合物转化为有机化合物。分析水生环境中壶菌多样性的新分子方法有可能为更好地理解水生生态系统的生态过程提供准确的定量数据。(C) 2008英国真菌学学会。Elsevier Ltd.出版。版权所有。
Chytrids are very important components of freshwater ecosystems, but the ecological significance of this group of fungi is not well understood. This review consicers some of the significant environmental factors affecting growth and population composition of chytrids in aquatic habitats. The physical factors include primarily salinity, dissolved oxygen concentration and temperature. The biological factors include the role of chytrids as saprobes and parasites and methods of dispersal of propagules throughout the ecosystem. Dispersal depends upon both zoospores for short range and whole thalli for long range dispersal. Five roles for chytrids in food-web dynamics are proposed: (1) chytrid zoospores are a good food source for zooplankton, (2) chytrids decompose particulate organic matter, (3) chytrids are parasites of aquatic plants, (4) chytrids are parasites of aquatic animals and (5) chytrids convert inorganic compounds into organic compounds. New molecular methods for analysis of chytrid diversity in aquatic environments have the potential to provide accurate quantitative data necessary for better understanding of ecological processes in aquatic ecosystems. (C) 2008 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.