通过长丝形态抵御鹦鹉螺捕食有利于 Raphidiopsis raciborskii 种群的生存

IF 5.5 1区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Zeshuang Wang , Xiaoli Huang , Yangyang Wu , Xiang Hu , Qihang Zhao , Jun Zuo , Peng Xiao , Yao Cheng , He Zhang , Renhui Li
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引用次数: 0

摘要

Raphidiopsis 水华因形成蓝藻毒素和极强的入侵性而臭名昭著,威胁着水生生态系统的稳定和人类健康。原生动物巴拉米哥(Paramecium)由于其捕食作用,有可能成为控制藻华的生物。然而,副栉水母的捕食能力在很大程度上取决于猎物的大小,而 Raphidiopsis 的种群由不同长度和大小的丝状体组成。与长丝相比,Paramecium 对 Raphidiopsis 群体中的短丝或小尺寸丝的选择性捕食行为仍不清楚。因此,在本研究中,我们共同培养了不同初始丰度的捕食者 Paramecium sp.和猎物 Raphidiopsis raciborskii,以探索这一知识空白。我们的研究结果表明(1) 在短丝副藻的选择性捕食作用下,R. raciborskii 的数量减少,而长丝 R. raciborskii 则存活下来;(2) 在较高的初始丰度下,以相同数量的 R. raciborskii 为食的副藻的生长量减少,而其承载能力则呈现相反的趋势;(3) 在副藻的捕食作用下,R. raciborskii 的形态发生了变化、(3) 在副蚤的摄食下,R. raciborskii 的形态向大型化方向发展,而副蚤初始丰度越高,这一过程越明显;(4) 副蚤初始丰度的增加加剧了 R. raciborskii 光合活性的下降。因此,副蚤对 R. raciborskii 的掠食作用主要影响短丝或小丝。总之,这些研究结果阐明了原生动物 Paramecium 和丝状蓝藻 Raphidiopsis 之间的种间相互作用,包括捕食者和被捕食者的种群动态以及形态和生理变化。这种对副蚤与 R. raciborskii 之间相互作用的深入了解可能对丝状蓝藻引起的水华的生物控制有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Defense against Paramecium predation via long filament morphology favors the survival of Raphidiopsis raciborskii populations

Raphidiopsis blooms are notorious for cyanotoxin formation and strong invasiveness, threatening the stability of aquatic ecosystems and human health. The protozoa Paramecium can potentially serve as an organism for controlling Raphidiopsis blooms owing to its grazing effect. However, the grazing ability of Paramecium is largely determined by the size of the prey, and the population of Raphidiopsis consists of filaments of varying lengths and sizes. The selective grazing behavior of Paramecium toward short-length or small-sized filaments in the Raphidiopsis population, as opposed to long filaments, remains unclear. Therefore, in this study, we co-cultured the predator Paramecium sp. with different initial abundances and the prey Raphidiopsis raciborskii to explore this knowledge gap. Our results suggested that: (1) the population of R. raciborskii declined under the selective grazing effect of Paramecium sp. on short filaments, whereas R. raciborskii with long filaments survived; (2) the growth of Paramecium sp. feeding on the same abundance of R. raciborskii was reduced at higher initial abundances, whereas its carrying capacity exhibited an opposite trend; (3) under ingestion by Paramecium sp., the morphology of R. raciborskii developed in the direction of becoming larger, and higher initial abundances of Paramecium sp. intensified this process; (4) increasing initial abundance of Paramecium sp. aggravated the decline of R. raciborskii photosynthetic activity. Therefore, the grazing effect of Paramecium sp. on R. raciborskii mainly affects filaments of short length or small size. Collectively, these results clarify the inter-species interaction between the protozoa Paramecium and filamentous cyanobacteria Raphidiopsis, including population dynamics and morphological and physiological changes in the predator and prey. Such insights into the interactions between Paramecium and R. raciborskii may have implications for the biological control of blooms caused by filamentous cyanobacteria.

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来源期刊
Harmful Algae
Harmful Algae 生物-海洋与淡水生物学
CiteScore
12.50
自引率
15.20%
发文量
122
审稿时长
7.5 months
期刊介绍: This journal provides a forum to promote knowledge of harmful microalgae and macroalgae, including cyanobacteria, as well as monitoring, management and control of these organisms.
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