Clonal structure and depth selection during a Caullerya mesnili epidemic in a hybridizing population of the Daphnia longispina complex
Clonal structure and depth selection during a Caullerya mesnili epidemic in a hybridizing population of the Daphnia longispina complex
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长斯溞复合体杂交群体中 Caullerya mesnili 流行期间的克隆结构和深度选择
DOI：
10.1007/s10750-015-2632-3
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发表时间：
2017
期刊：
影响因子：
2.6
通讯作者：
P. Spaak
中科院分区：
文献类型：
--
作者：
Tardent N;C. Tellenbach;P.W. Turko;P. Spaak
Daphniperform Diel垂直迁移(DVM)，这是一种避免捕食者的策略，早上向水柱中更深更冷的层迁移，晚上向富含藻类的表层迁移。然而，进行DVM的个体会招致几种取舍，因为他们可能会受到资源限制和更深层次的较低瞬时出生率的影响。DVM模式可以被非生物因素改变，如温度、食物浓度或pH，并且在不同的种类和基因型之间有所不同。此外，达芙尼体内有各种微寄生虫，这些微寄生虫可能构成影响DVM行为的另一个因素。对于受感染的个体来说，迁徙到温度较低的层可能会减缓寄生虫的生长。此外，寄生虫会增加宿主的不透明度。然后，非迁徙的个体可能会被视觉上捕食的捕食者选择性地从上层清除出去。在这些前提下，我们通过分析两个日期的昼夜垂直分布，询问了鱼孢子虫的流行是否影响或受到瑞士格雷芬西湖达夫尼亚的DVM行为的影响。此外，我们感兴趣的是潜在的相互作用是否取决于宿主基因。因此，我们在一年的时间里对整合种群的基因组成进行了定期采样，并在夏末考勒尔疫情期间对其进行了细粒度的垂直分辨率研究。由于感染白纹伊蚊的水蚤和未感染水蚤的迁徙情况一样好，本研究的结果表明，白纹伊蚊是一种流行病，既不影响也不受水蚤DVM行为的影响。我们在湖中观察到了克隆演替，但不能将这种演替与卡氏杆菌流行联系起来；除了一个常见的多位点基因型别外，所有的基因座都未被感染。此外，这场新冠疫情的爆发和进程似乎主要依赖于环境线索。由于第一项研究只提供了一个时间的快照，我们希望能做进一步的研究来验证我们的结果。
Daphniaperform diel vertical migration (DVM), a predator-avoidance strategy to migrate towards deeper and colder layers in the water column in the morning and movement to the algae-rich surface layers in the evening. However, individuals performing DVM incur several trade-offs since they might suffer from resource limitation and a slower instantaneous birth rate in deeper depths. DVM patterns may be modified by abiotic factors such as temperature, food concentration, or pH and vary among differentDaphniaspecies and genotypes. Furthermore,Daphniahost a variety of microparasites that might pose an additional factor influencing DVM behaviour. For infected individuals, migration into cooler temperature layers might slow down parasite growth. Moreover, parasites can increase opacity of their hosts. Non-migrating individuals might then be selectively purged from the upper layers by visually hunting predators. With these premises we asked, whether epidemics of the ichthyosporean parasiteCaullerya mesniliaffect or are affected by the DVM behaviour ofDaphniain Lake Greifensee, Switzerland by analysing the vertical distribution ofDaphniaduring day and night on two dates. Furthermore, we were interested whether a potential interaction depends on host genotype. We therefore studied the genotypic composition of the integrated population in regular sampling intervals over the course of one year and on a fine-grained vertical resolution during theCaulleryaepidemic in late summer. SinceCaullerya-infectedDaphniamigrated equally well as uninfected ones, the findings of this study suggest thatCaulleryaepidemics neither affected nor were affected by the DVM behaviour ofDaphnia. We observed clonal succession in the lake but could not link this succession to theCaulleryaepidemic; all except one of the common multilocus genotypes were under-infected. In addition, outbreak and course of thisCaulleryaepidemic seemed to rely mainly on environmental cues. Because this first study only provides a snapshot of time, we hope that further studies will be done to verify our results.
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温度对自然杂交复合体中寄生虫流行的影响
影响因子：
3.3
作者：
C. N. Schoebel;C. Tellenbach;P. Spaak;J. Wolinska
通讯作者：
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DOI：
--
发表时间：
2000
期刊：
影响因子：
--
作者：
P. Spaak;L. Eggenschwiler;Hans Rudolf Bürgi
通讯作者：
Hans Rudolf Bürgi
影响因子：
2.1
作者：
J. Wolinska;J. Seďa;Henrike Koerner;P. Šmilauer;A. Petrusek
通讯作者：
A. Petrusek
影响因子：
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作者：
Aaron M. Christ
通讯作者：
Aaron M. Christ
水蚤垂直迁移策略的进一步权衡
DOI：
--
发表时间：
1993
期刊：
影响因子：
--
作者：
A. Duncan;C. Guisande;W. Lampert
通讯作者：
W. Lampert