Trait‐based approach using in situ copepod images reveals contrasting ecological patterns across an Arctic ice melt zone
Trait‐based approach using in situ copepod images reveals contrasting ecological patterns across an Arctic ice melt zone
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使用原位桡足类图像的基于特征的方法揭示了北极冰融化区对比的生态模式
DOI：
10.1002/lno.11672
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发表时间：
2021
影响因子：
4.5
通讯作者：
S. Ayata
中科院分区：
文献类型：
--
作者：
Laure Vilgrain;F. Maps;M. Picheral;M. Babin;Cyril Aubry;J. Irisson;S. Ayata
成像技术越来越多地用于生态学研究，产生大量的数据。从个体图像中推断功能特征可以提供对生态系统过程的原始见解。形态性状和其他功能性状一样，是影响生物体适应性的个体特征。我们从原位图像数据中测量它们，以研究海冰破裂期间的北极浮游动物群落。形态描述符（例如，面积，亮度，复杂性）自动测量了28，000个个体桡足类图像，这些图像来自部署在冰缘150多个采样点的高分辨率水下相机。统计定义的形态空间允许将形态信息合成为可解释的和连续的性状（大小、不透明度和附属物可见性）。这种新方法提供了理论和方法上的优势，因为它通过自动分析单个图像的大型数据集来访问种间和种内变异性。形态特征的空间分布表明，大型桡足类与冰盖沃茨，而开放的沃茨主机较小的个人。在那些无冰的沃茨，桡足类似乎也更积极地进食，正如其附属物可见度增加所表明的那样。这些特征的分布可能是由自下而上的控制解释：在光照良好的开放沃茨中，浮游植物浓度高，鼓励个体积极进食，并刺激小型桡足类阶段的发展。此外，位于冰缘的桡足类是不透明的，可能是因为完整的肠道或增加红色色素沉着。我们基于形态特征的方法揭示了否则无法获得的生态模式，包括北极生态系统中与冰缘环境相关的桡足类的颜色和姿势变化。
Imaging techniques are increasingly used in ecology studies, producing vast quantities of data. Inferring functional traits from individual images can provide original insights on ecosystem processes. Morphological traits are, as other functional traits, individual characteristics influencing an organism's fitness. We measured them from in situ image data to study an Arctic zooplankton community during sea ice break‐up. Morphological descriptors (e.g., area, lightness, complexity) were automatically measured on ∼ 28,000 individual copepod images from a high‐resolution underwater camera deployed at more than 150 sampling sites across the ice‐edge. A statistically‐defined morphological space allowed synthesizing morphological information into interpretable and continuous traits (size, opacity, and appendages visibility). This novel approach provides theoretical and methodological advantages because it gives access to both inter‐ and intra‐specific variability by automatically analyzing a large dataset of individual images. The spatial distribution of morphological traits revealed that large copepods are associated with ice‐covered waters, while open waters host smaller individuals. In those ice‐free waters, copepods also seem to feed more actively, as suggested by the increased visibility of their appendages. These traits distributions are likely explained by bottom‐up control: high phytoplankton concentrations in the well‐lit open waters encourages individuals to actively feed and stimulates the development of small copepod stages. Furthermore, copepods located at the ice edge were opaquer, presumably because of full guts or an increase in red pigmentation. Our morphological trait‐based approach revealed ecological patterns that would have been inaccessible otherwise, including color and posture variations of copepods associated with ice‐edge environments in Arctic ecosystems.
不断变化的北极的中上层食物网：基于特征的视角表明了一种恢复力模式
影响因子：
3.3
作者：
Renaud P
通讯作者：
Renaud P
影响因子：
2.7
作者：
Ellen, Jeffrey S.;Graff, Casey A.;Ohman, Mark D.
通讯作者：
Ohman, Mark D.