SCLEROCHRONOLOGICAL RECORDS OF TEMPERATURE AND GROWTH FROM SHELLS OF MERCENARIA-MERCENARIA FROM NARRAGANSETT BAY, RHODE-ISLAND
SCLEROCHRONOLOGICAL RECORDS OF TEMPERATURE AND GROWTH FROM SHELLS OF MERCENARIA-MERCENARIA FROM NARRAGANSETT BAY, RHODE-ISLAND
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DOI：
10.1007/bf00428284
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发表时间：
1989-01-01
期刊：
影响因子：
2.4
通讯作者：
ALLARD, DJ
中科院分区：
文献类型：
--
作者：
JONES, DS;ARTHUR, MA;ALLARD, DJ
硬蛤（Mercenaria Mercenaria）壳的年度内部生长增量提供了生长历史和某些类型的环境变化的准确记录。这些增量用于确定 1984 年至 1985 年从美国罗德岛州纳拉甘西特湾十个地点收集的硬蛤的年龄和生长率，并评估海湾内生长的地理变化。通过使用 von Bertalanffy 方程和 omega 对蛤的生长进行建模，促进了区域比较。 Gallucci 和 Quinn 的参数。硬蛤的最佳生长区域是靠近海湾的顶部，而更北的地区（普罗维登斯河）和南边的地区（下海湾）生产力较低。大小和年龄之间的关系与新泽西州北部硬蛤的报道相似。使用树木年代学技术，在时间（逐年）的基础上分析生长的变化。硬蛤的相对寿命（遇到了 40 个年环的个体）证明了几十年的硬年代学是可能的。建立了基于 100 个人的 26 年增长记录，涵盖 1959 年至 1984 年。双壳类的生长发生了显着的时间变化，并且在过去二十年的记录中注意到了生长指数增加的广泛趋势。年标准化生长指数值与纳拉甘西特湾同一时间段的年平均水温呈高度正相关。这些双壳类的增量贝壳记录提供了海洋气候（温度）变化和生长的定量指示，可用于预测自然或人为环境扰动的影响。
Annual internal growth increments in shells of hard clams (Mercenaria mercenaria) provide an accurate record of both growth history and some types of environmental change. These increments were used to determine age and growth rate of hard clams collected in 1984-1985 from ten sites in Narragansett Bay, Rhode Island, USA, and to assess geographic variation in growth within the bay. The regional comparisons were facilitated by modeling the clam growth using the von Bertalanffy equation and the .omega. parameter of Gallucci and Quinn. The optimum region for hard clam, growth was near the head of the bay, with areas further north (Providence River) and south (lower bay) not as productive. The relationship between size and age was similar to that reported for hard clams from northern New Jersey. Using dendrochronological techniques, variations in growth were analyzed on a temporal (year-to-year) basis. The comparative longevity of the hard clams (individuls with 40 annual bands were encountered) demonstrated that sclerochronologies of several decades were possible. A 26 yr growth record based upon 100 individuals was established, covering the years 1959-1984. Significant temporal variations occurred in bivalve growth, and a broad trend of increasing growth indices over the last two decades of the record was noted. The yearly standardized growth index values were highly and positively correlated with mean annual water temperatures in Narragansett Bay for the same time interval. The incremental shell records of these bivalves provide a quantitative indication of marine climatic (temperature) variability and growth which can be used in hindcasting the effects of natural or anthropogenic environmental perturbations.