SIGNIFICANCE OF TIME-AVERAGING FOR PALEOCOMMUNITY ANALYSIS
SIGNIFICANCE OF TIME-AVERAGING FOR PALEOCOMMUNITY ANALYSIS
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DOI：
10.1111/j.1502-3931.1990.tb01355.x
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发表时间：
1990-04-15
期刊：
影响因子：
1.5
通讯作者：
ABERHAN, M
中科院分区：
文献类型：
--
作者：
FURSICH, FT;ABERHAN, M
Fürsich，F. t. & Aberhan，M. 1990 04 15：时间平均对古群落分析的意义. Lethaia，Vol. 23，pp. 143-152.奥斯陆。ISSN 0024 - 1164.由沉积学、生物学或自生因素引起的时间平均现象在海洋环境中广泛存在。它可以用地层学、生态学、埋藏学或沉积学标准来识别。群落参数，如多样性，物种的相对丰度，分类，并在较小程度上，营养和生活习性组成可能会严重不同的thanatocoenosis（死亡组合）和时间平均taphocoenosis，取决于群落的稳定程度。时间平均的社区遗迹与近代社区的质量不同，两者之间的任何比较都必须考虑到这一点。尽管与能量水平密切相关的外来时间平均在非常浅的环境中特别常见，但除了净沉积速率之外，本地时间平均的重要性随着距离海岸的距离和深度而增加。短期时间平均（大约几千年）在近海岸的浅水环境中普遍存在，而长期时间平均（大约104到105年）在较低的大陆架和深海环境中变得更加重要。
Fürsich, F. T. & Aberhan, M. 1990 04 15: Significance of time‐averaging for palaeo community analysis.Lethaia, Vol. 23, pp. 143–152. Oslo. ISSN 0024–1164.Time‐averaging caused by sedimentological, biological, or digenetic factors is widespread in marine environments. It can be recognized using stratigraphic, ecological, taphonomic, or sedimcntologic criteria. Community parameters such as diversity, relative abundance of species, taxonomic and, to a lesser extent, trophic and life habit composition may seriously differ between thanatocoenosis (death assemblage) and time‐averaged taphocoenosis, depending on the degree of community stability. Time‐averaged community relics have a quality different from that of Recent communities and any comparison between the two has to take this into account. Whereas allochthonous time‐averaging, which is strongly related to the energy level, is particularly common in very shallow environments, the importance of autochthonous time‐averaging, related in addition to the rate of net sedimentation, increases with distance from the shore and with depth. Short‐term time‐averaging (in the order of up to several thousand years) prevails in near shore shallow environments, whilst long‐term time‐averaging (in the order of 104to 105years) becomes more important towards lower shelf and deep sea environments.