CRYPTOENDOLITHIC ALGAL COMMUNITIES OF THE COLORADO PLATEAU
CRYPTOENDOLITHIC ALGAL COMMUNITIES OF THE COLORADO PLATEAU
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DOI：
10.1111/j.1529-8817.1986.tb02485.x
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发表时间：
1986-12-01
影响因子：
2.9
通讯作者：
SOMMERFELD, MR
中科院分区：
文献类型：
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作者：
BELL, RA;ATHEY, PV;SOMMERFELD, MR
从亚利桑那州北部、犹他州南部和新墨西哥州西部四个半沙漠和冷温带生物群落的八个砂岩表面以下分离出十八个分类单元，包括真核和原核属的代表。藻类在浅色砂岩中以均匀、轮廓分明的带状出现，在深色砂岩中也以分散的斑块形式出现。藻类群落的一般组成、叶绿素 a 含量以及在不同砂岩中的位置各不相同。根据叶绿素 a 含量估算的生物量大约是寒冷沙漠栖息地隐内石藻带报道的生物量的两到二十倍。某些藻类在科罗拉多高原内石生境中的广泛分布以及它们在相当远的位置的岩石中的存在表明，只要内石生境提供比周围表面更有利的条件，就可以被藻类利用。
Eighteen taxa, including representatives of both eukaryotic and prokaryotic genera, were isolated from below the surface of eight sandstones in four semi-desert and cold temperate biomes of northern Arizona, southern Utah and Western New Mexico. The algae occurred as uniform well-defined bands in light-colored sandstones and also as scattered patches in dark sandstones. The algal communities varied in generic composition, chlorophyll a content, and location within the different sandstones. Biomass, estimated by chlorophyll a content, was approximately two to twenty-fold greater than reported for cryptoendolithic algal bands in a cold desert habitat. The widespread distribution of certain algae in endolithic habitats of the Colorado Plateau and their presence in rocks at quite distant locations suggests that the endolithic habitat may be utilized by algae whenever it provides more favorable conditions than the surrounding surfaces.