Seasonal variation in the attachment strength of blue mussels: Causes and consequences
Seasonal variation in the attachment strength of blue mussels: Causes and consequences
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DOI：
10.4319/lo.2002.47.6.1723
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发表时间：
2002-11-01
影响因子：
4.5
通讯作者：
Carrington, E
中科院分区：
文献类型：
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作者：
Carrington, E
温带岩石海岸的潮间带通常由贻贝占据，形成密集的床，并排除其他主要的空间持有者。风暴将贻贝从其基质中移走的速率因此对潮间带群落结构具有控制性影响。通过比较有机体的附着强度和它遇到的力，可以从机械学上预测波浪的扰动率。这种方法经常使用的一个简化假设是，生物体的强度在时间上是恒定的。这项研究表明，这样的假设是不成立的贻贝在罗得岛，那里的深海附着强度（韧性）增加两倍，在冬季相比，夏季。每月样本（1998 - 2000年）的时间序列分析表明韧性一般跟踪波高的季节性波动，这表明贻贝的感觉和响应的变化，在他们的流动环境。然而，贻贝对波浪气候的反应能力并不精确;在9月和10月（飓风季节），贻贝的附着力很弱，很容易发生重大死亡。贻贝的繁殖条件也表现出季节性周期，在附着强度后3-4个月达到高峰。这表明一个可能的精力充沛的限制贻贝的能力，以应对他们的流动环境，贻贝贸易baysal线程生产性腺发育。这项研究表明，扰动事件的准确预测不仅要考虑风暴的大小，但其时间相对于附着强度的周期。鉴于最近北大西洋的飓风活动增加，贻贝可能会开始遭受比1971-1994年更频繁和更严重的扰动。
The midintertidal zone of temperate rocky coasts is often dominated by mussels that form dense beds and exclude other primary space holders. The rate at which storms remove mussels from their substrate consequently has a controlling influence on intertidal community structure. The rate of disturbance by waves can be predicted mechanistically by comparing the attachment strength of an organism to the force it encounters. One simplifying assumption often implemented with this approach is that organismal strength is temporally constant. This study demonstrates that such an assumption is not valid for Mytilus edulis in Rhode Island, where byssal attachment strength (tenacity) increases twofold in winter compared to summer. Time series analysis of monthly samples (19982000) indicates tenacity generally tracks seasonal fluctuations in wave height, which suggests that mussels sense and respond to changes in their flow environment. However, the ability of mussels to respond to wave climate is not precise; during September and October (hurricane season), mussels remain weakly attached and are prone to major mortalities. Mussel reproductive condition also displays seasonal cycles, peaking 3-4 months after attachment strength. This suggests a possible energetic constraint on the ability of mussels to respond to their flow environment, as mussels trade byssal thread production for gonad development. This study demonstrates that accurate predictions of disturbance events must consider not only a storm's magnitude, but its timing relative to the cycle in attachment strength. Given the recent shift to increased hurricane activity in the North Atlantic, it is likely that mussels will begin to suffer more frequent and more severe disturbances compared to those that occurred during 1971-1994.