Biology/Chemistry Division, Corning Community College, Corning, New York 14830.
Mycologia. 2003 Jan-Feb;95(1):11-8. doi: 10.1080/15572536.2004.11833126.
A microhabitat study of protostelids was carried out in a Tropical Wet Forest at the La Selva Biological Station in Costa Rica. Nine species were recorded from sterile wheat straws placed out and then re-collected over a period of six weeks from two different litter microhabitats in an area of primary forest. All nine species were present on straws placed in the aerial litter microhabitat, but only six species were present on straws placed in the forest floor litter microhabitat. Total colonies, percent of straws colonized, and mean number of species per straw increased significantly over time. One species (Schizoplasmodiopsis pseudoendospora) typical of temperate litter was the overwhelming dominant on the forest floor litter, while Echinostelium bisporum, a species rare in temperate litter microhabitats, was the single most abundant species in the aerial litter microhabitat. Both of these species had significantly increased frequencies over time. Two species abundant in temperate aerial litter microhabitats and one species abundant in temperate forest floor litter were rare at La Selva. Our data conform to those obtained in an earlier study carried out in tropical forests in the mountains of Puerto Rico and provide additional support towards developing a model of microhabitat distribution of protostelids in terrestrial ecosystems.
在哥斯达黎加的拉塞尔瓦生物站的热带湿地森林中，进行了原生动物的小生境研究。从两个不同的枯枝落叶微生境中，从无菌的小麦秸秆中取出并在六周内重新收集，记录到了 9 个物种。所有 9 个物种都存在于放置在空气中的枯枝落叶微生境的秸秆上，但只有 6 个物种存在于森林地面枯枝落叶微生境的秸秆上。总殖民地、被殖民秸秆的百分比和每秸秆的平均物种数量随着时间的推移显著增加。一种（拟内胞霉属 Schizoplasmodiopsis pseudoendospora）是典型的温带枯枝落叶优势种，在森林地面枯枝落叶中占绝对优势，而在温带枯枝落叶微生境中很少见的 Echinostelium bisporum 是空气中枯枝落叶微生境中单一最丰富的物种。这两个物种的频率随着时间的推移都显著增加。两种在温带空气枯枝落叶微生境中丰富的物种和一种在温带森林地面枯枝落叶中丰富的物种在拉塞尔瓦很少见。我们的数据与在波多黎各山区的热带森林中进行的早期研究中获得的数据一致，并为在陆地生态系统中建立原生动物小生境分布模型提供了额外的支持。
