Scale-dependent size variability of Cyprideis torosa (Ostracoda)

IF 1.4 4区 环境科学与生态学 Q3 LIMNOLOGY
Marlene Hoehle, Thomas Brachert, Werner E. Piller, Claudia Wrozyna
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Abstract

Organism size is considered a master trait influencing virtually every aspect of life, but the underlying mechanisms of phenotypic variation are still poorly understood. This study examined the valve size (length, height, width) of an ostracod species (Cyprideis torosa) collected from different lakes of the Mansfeld Lakes (ML), Central Germany. Size variability were investigated on different temporal (ecological and geological) scales and compared on different spatial (regional and local) scales. Statistical methods were applied to explore size variation between and within sample locations and the relationship between size traits and physical and chemical parameters (salinity, oxygen, temperature, pH). In ML no significant differences in size between contiguous lakes were detected but two morphotypes in males were identified in stratigraphically separated Holocene samples and co-occurring within Recent samples. Seasonal effects were detected for females (smaller size in spring than in autumn) and males (smaller size range in spring, higher variability in autumn). The correlation of size traits with environmental parameters revealed no general patterns, but a locally limited correlation between size and salinity in ML exists. On spatial and temporal scales, males and females show sex-specific size patterns, possibly due to differences in life history traits or selection pressure.

Abstract Image

鲤形目(梭形目)随尺度变化的大小差异
生物体的大小被认为是影响生命几乎所有方面的主要特征,但人们对表型变异的内在机制仍然知之甚少。本研究考察了从德国中部曼斯菲尔德湖(ML)不同湖泊中采集的一种梭形纲动物(Cyprideis torosa)的瓣膜尺寸(长度、高度和宽度)。研究了不同时间(生态和地质)尺度上的尺寸变化,并在不同空间(区域和地方)尺度上进行了比较。采用统计方法探讨了样本地点之间和内部的大小变化,以及大小特征与物理和化学参数(盐度、氧气、温度、pH 值)之间的关系。在地中海,未发现毗连湖泊之间存在明显的体型差异,但在地层上分开的全新世样本中发现了雄鱼的两种形态,在新近世样本中也发现了雄鱼的两种形态。在雌性(春季体型小于秋季)和雄性(春季体型范围较小,秋季变化较大)中发现了季节效应。体型特征与环境参数的相关性没有发现普遍的模式,但在局部范围内,ML 的体型与盐度之间存在有限的相关性。在空间和时间尺度上,雄性和雌性表现出性别特异性的体型模式,这可能是由于生活史特征的差异或选择压力造成的。
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来源期刊
Limnology
Limnology 地学-湖沼学
CiteScore
4.30
自引率
6.20%
发文量
15
审稿时长
>12 weeks
期刊介绍: Limnology is a scientific journal published three times a year, in January, April, and August, by Springer in association with the Japanese Society of Limnology. The editors welcome original scientific contributions on physical, chemical, biological, or related research, including environmental issues, on any aspect of basic, theoretical, or applied limnology that present significant findings for the community of scholars. The journal publishes Rapid communications, Research papers, Review articles, Asia/Oceania reports, and Comments. The aims and scope of Limnology are to publish scientific and/or technical papers in limnological sciences, to serve as a platform for information dissemination among scientists and practitioners, to enhance international links, and to contribute to the development of limnology.
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