How does Calanus helgolandicus maintain its population in a variable environment? Analysis of a 25-year time series from the English Channel
How does Calanus helgolandicus maintain its population in a variable environment? Analysis of a 25-year time series from the English Channel
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赫尔戈兰哲水蚤如何在多变的环境中维持种群数量？
DOI：
10.1016/j.pocean.2015.04.028
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发表时间：
2015
影响因子：
4.1
通讯作者：
Maud J
中科院分区：
文献类型：
--
作者：
Maud J
海螺（Calanus helgolandusus）是东北大西洋和边缘大陆架的关键桡足动物，随着海洋变暖，其分布正在向北扩展。普利茅斯L4站点在过去的25年中已经变暖，并且在食物供应的时间和可用性方面经历了很大的变化。helgolandicus。在这里，我们研究了这些变化在多大程度上转化为生殖产出和随后的c。helgolandicuspopulation大小。产蛋率（雌卵- 1day - 1）在春季至初夏硅藻华和纤毛虫丰度高的时期达到最大，而在自养鞭毛藻同样大的秋季华期间达到最大。春季的卵孵化成功率较低，且畸形畸形的比例较高。时间和夏季的平均丰度。黄栌（helgolandicus, CI-CVI）反映了春季总繁殖产量。然而，这种关系是由雌性丰度的年际变化驱动的，而不是由每只雌性的产蛋量驱动的，后者的范围只有两倍。冬季丰富的c。helgolandicusat L4比其他季节的丰度变化更大，反映了前一个生长季节的情况。然而，这些冬季低丰度对下一季节的种群规模没有明显的传递信号。总的来说,theC。在这个充满活力的近岸地点，黑尔兰的种群似乎具有惊人的弹性，没有长期的物候变化，年之间的平均丰度只有四倍的变化。这种抑制效应可能反映了一系列的死亡来源，与季节早期分层的时间有关，可能影响蛋的下沉和损失，加上仲夏早期阶段强烈的、密度依赖的死亡，可能是通过捕食造成的。
Calanus helgolandicusis a key copepod of the NE Atlantic and fringing shelves, with a distribution that is expanding northwards with oceanic warming. The Plymouth L4 site has warmed over the past 25-years, and experiences large variations in the timing and availability of food forC. helgolandicus. Here we examine the degree to which these changes translate into variation in reproductive output and subsequentlyC. helgolandicuspopulation size. Egg production rates (eggs female−1day−1) were maximal in the spring to early-summer period of diatom blooms and high ciliate abundance, rather than during the equally large autumn blooms of autotrophic dinoflagellates. Egg hatch success was lower in spring however, with a greater proportion of naupliar deformities then also. Both the timing and the mean summer abundance ofC. helgolandicus(CI–CVI) reflected those of spring total reproductive output. However this relationship was driven by inter-annual variability in female abundance and not that of egg production per female, which ranged only two-fold. Winter abundance ofC. helgolandicusat L4 was much more variable than abundance in other seasons, and reflected conditions from the previous growing season. However, these low winter abundances had no clear carry-over signal to the following season’s population size. Overall, theC. helgolandicuspopulation appears to be surprisingly resilient at this dynamic, inshore site, showing no long-term phenology shift and only a four-fold variation in mean abundance between years. This dampening effect may reflect a series of mortality sources, associated with the timing of stratification in the early part of the season, likely affecting egg sinking and loss, plus intense, density-dependent mortality of early stages in mid-summer likely through predation.
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影响因子：
2.5
作者：
R. Daan;S. Gonzalez;W. K. Breteler
通讯作者：
R. Daan;S. Gonzalez;W. K. Breteler
影响因子：
2.1
作者：
Eloire, Damien;Somerfield, Paul J.;Bonnet, Delphine
通讯作者：
Bonnet, Delphine
西英吉利海峡的渐进变化促进了浮游生物食物网的重组
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
G. Reygondeau;J. Molinero;S. Coombs;B. MacKenzie;D. Bonnet
通讯作者：
D. Bonnet
两个同属桡足类桡足类物种（Calanus finmarchicus 和 C. helgolandicus）之间令人惊讶地缺乏差异
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
R. Wilson;D. Speirs;M. Heath
通讯作者：
M. Heath
影响因子：
3.3
作者：
Chust, Guillem;Castellani, Claudia;Irigoien, Xabier
通讯作者：
Irigoien, Xabier