Analysis of ontogenetic growth trends in two marine Antarctic bivalves Yoldia eightsi and Laternula elliptica: Implications for sclerochronology
Analysis of ontogenetic growth trends in two marine Antarctic bivalves Yoldia eightsi and Laternula elliptica: Implications for sclerochronology
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两种南极海洋双壳类 Yoldia Augustsi 和 Laternula elliptica 的个体发育生长趋势分析：对硬化年代学的启示
DOI：
10.1016/j.palaeo.2016.05.004
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Román-González A
中科院分区：
文献类型：
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作者：
Román-González A
越来越多地使用海洋物种作为海洋领域的古气候记录器。这些档案为缺乏仪器观测的区域提供了过去海洋可变性的新基线记录。本文报道了用负指数去趋势法和多锥度法对西南极半岛种群中的两种南极海洋双壳软体动物：八种双壳软体动物和椭圆小贝类的个体发育生长模式的研究结果。我们的数据显示，这两种生物的生长。八尺八寸。椭圆遵循着一个普遍的负指数趋势，随着他们的寿命。然而，我们的分析也发现，在Y的生长增量模式中，存在着内在的9.06年周期性内生生长节律。发现了8种和2种天然周期生长节律，即5年周期和6.6年周期。椭圆形。我们假设他们。八种内源生长节律可能与能量资源在体细胞生长和配子发生之间的重新分配有关，尽管需要更多的生物学数据来验证这一假说。进一步的工作投入。需要椭圆生物学来理解为该物种发现的先天生长节律的可能意义。生长节律的识别不仅对它们的生物学意义很重要，而且在岩石年代学分析中也很重要，因为它们在发展古环境重建方面具有重要意义。
There is an increasing use of marine species as palaeoclimate recorders for the marine realm. These archives provide novel baseline records of past oceanographic variability in regions devoid of instrumental observations. Here we report results of a study of the ontogenetic growth pattern of two Antarctic marine bivalve molluscs:Yoldia eightsiandLaternula ellipticafrom West Antarctic Peninsula populations using negative exponential detrending technique and multi-taper method spectral analysis. Our data show that the growth of bothY. eightsiandL. ellipticafollows a general negative exponential trend over their longevity. However, our analyses also identified an innate 9.06 year periodic endogenous growth rhythm in the growth increment pattern ofY. eightsiand two innate periodic growth rhythms, 5 and 6.6 year period, were found inL. elliptica. We hypothesize that theY. eightsiendogenous growth rhythm may be related to the reallocation of energetic resources between somatic growth and gametogenesis although more biological data are required to test this hypothesis. Further work intoL. ellipticabiology is required to understand the possible meaning of the innate growth rhythms found for this species. The identification of growth rhythms is important not only for their biological significance but also in sclerochronological analysis because of their importance in developing palaeoenvironmental reconstructions.