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Evaluation of caridean ecological distribution in the Ubatuba region, southeastern Brazilian coast using unsupervised machine learning technique
Marine Ecology ( IF 1.1 ) Pub Date : 2021-08-04 , DOI: 10.1111/maec.12673
Alexandre Oliveira Marques 1, 2 , Aline Nonato Sousa 1 , Veronica Pereira Bernardes 1 , Camila Hipolito Bernardo 1 , Danielle Monique Reis 1 , Amanda Thaís Godoy 1 , Adilson Fransozo 1
Affiliation  

We used the unsupervised machine learning technique to evaluate the environmental factors responsible for modulating the spatial and seasonal distribution of caridean shrimps from a southeastern region of the Brazilian coast. Samplings were collected from seven transects with an artisanal shrimp fishery boat with two double-rig nets. Samplings occurred every month from October 2008 to September 2009. The most frequently captured species were Exhippolysmata oplophoroides, Leander paulensis, and Nematopalaemon schmitti. The highest abundance of shrimps occurred in autumn at the II, III, and V transects, which present a higher amount of coarse sediment and biodetritic fragments on the bottom. During autumn, the temperatures were the highest and salinity values were the lowest. Data evaluation indicated efficiency in the visualization of interactions of different shrimp species and environmental data. This kind of sediment may be allowing shrimps to burrow in shelters that prevent predation. The seasons with high temperatures and low salinities can offer better conditions for the establishment of the studied species, despite the fact that there is no hypothesis to prove it. Additionally, the higher abundance of such shrimps coincides with vegetal debris deposition, which could serve as food and provide protection for these shrimps. In this region, the vegetation matter deposited at the bottom of the bay comes from the Atlantic Forest. Overall, the preservation of the coastal forest strongly influences the abundance of this taxon, as it provides protection and food for these shrimps.

中文翻译:

使用无监督机器学习技术评估巴西东南部海岸 Ubatuba 地区的 caridean 生态分布

我们使用无监督机器学习技术来评估负责调节巴西海岸东南部地区 caridean 虾的空间和季节分布的环境因素。用一艘带有两个双钻网的手工捕虾船从七个断面收集样品。从 2008 年 10 月到 2009 年 9 月,每个月都进行采样。最常捕获的物种是Exhippolysmata oplophoroidesLeander paulensisNematopalaemon schmitti. 虾的丰度最高出现在秋季的 II、III 和 V 横断面上,这些横断面在底部呈现出大量的粗沉积物和生物碎屑碎片。秋季气温最高,盐度最低。数据评估表明不同虾种和环境数据之间相互作用的可视化效率。这种沉积物可能会让虾在防止捕食的庇护所中挖洞。尽管没有假设可以证明这一点,但高温和低盐度的季节可以为研究物种的建立提供更好的条件。此外,此类虾的丰度较高与植物残骸沉积相吻合,可作为食物并为这些虾提供保护。在这个地区,沉积在海湾底部的植被物质来自大西洋森林。总体而言,沿海森林的保护强烈影响了该分类群的丰度,因为它为这些虾提供了保护和食物。
更新日期:2021-08-04
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