Stabilization Role of Crustose Coralline Algae During Late Pleistocene Reef Development on Isla Cerralvo, Baja California Sur (Mexico)
Stabilization Role of Crustose Coralline Algae During Late Pleistocene Reef Development on Isla Cerralvo, Baja California Sur (Mexico)
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南下加利福尼亚州塞拉尔沃岛（墨西哥）晚更新世珊瑚礁发育期间壳质珊瑚藻的稳定作用
DOI：
10.2112/jcoastres-d-11t-00009.1
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发表时间：
2011
影响因子：
11.6
通讯作者：
Markes E. Johnson
中科院分区：
文献类型：
--
作者：
Peter W. Tierney;Markes E. Johnson
摘要TIERNEY，P.W.约翰逊，M.E.，2012.南下加利福尼亚（墨西哥）塞拉尔沃岛晚更新世珊瑚礁发展期间甲壳珊瑚藻的稳定作用。晚更新世（122，143 ± 175 YBP）期间，在加州湾南部的Isla Cerralvo上，甲壳珊瑚藻在珊瑚礁建立中发挥了重要作用。运输的鹅卵石一般是细长的碎屑形状（平均球度：0.6），在锁定在一个N-S的路线（平均N2°W），并提供了一个固定的基板由Porites和Pocillopora珊瑚殖民前，由珊瑚红藻结壳。一个边缘的珊瑚礁生长在这条由碎屑结壳的红榴石组成的路面上，并由额外的鹅卵石珊瑚循环继承。在五个重复的分层周期中，只有第二个和第三个周期提供了足够的暴露量，可以有把握地量化。普查数据，鹅卵石的方向，并测量藻皮收集到的特征过渡，从红长石珊瑚。第二个循环中的碎屑（平均尺寸7.4 × 4.6 cm）的最厚皮平均为5.4 mm（标准差，或SD，4.2 mm），最薄皮平均为0.9 mm（SD 0.8 mm）。直接覆盖的珊瑚反映了16.2厘米的平均高度。第三个周期内的碎屑（平均尺寸为7.2 × 4.6 cm）最厚处的外皮平均为3.1 mm（SD 2.5 mm），最薄处的外皮平均为0.9 mm（SD 0.8 mm）。直接覆盖的珊瑚反映了15.4厘米的平均高度。珊瑚藻帮助水泥都下面的鹅卵石路面和珊瑚礁。
Abstract TIERNEY, P.W. and JOHNSON, M.E., 2012. Stabilization role of crustose coralline algae during Late Pleistocene reef development on Isla Cerralvo, Baja California Sur (Mexico). Crustose coralline algae played a fundamental role in reef establishment during the Late Pleistocene (122,143 ± 175 YBP) on Isla Cerralvo in the southern Gulf of California. Transported cobbles with a generally elongated clast shape (mean sphericity: 0.6) were encrusted by coralline red algae before locking in a N–S alignment (mean N2°W) and providing a fixed substrate for colonization by Porites and Pocillopora corals. A fringing reef grew on this pavement of clast-encrusting rhodoliths and was succeeded by additional cobble-coral cycles. Out of five stratigraphically repetitive cycles, only the second and third offer sufficient exposure to be quantified with any confidence. Census data, cobble orientations, and measurements of algal rinds were collected to characterize the transition from rhodoliths to corals. Clasts in the second cycle (mean dimensions 7.4 × 4.6 cm) have rinds that average 5.4 mm (standard deviation, or SD, 4.2 mm) at their thickest and 0.9 mm (SD 0.8 mm) at their thinnest. Directly overlying corals reflect an average height of 16.2 cm. Clasts within the third cycle (mean dimensions 7.2 × 4.6 cm) have rinds that average 3.1 mm (SD 2.5 mm) at their thickest and 0.9 mm (SD 0.8 mm) at their thinnest. Directly overlying corals reflect an average height of 15.4 cm. Coralline algae helped cement both underlying cobble pavement and reef corals.