Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus

Predation and competition are the primary interspecies interactions in aquatic ecosystem. Understanding how these two stressors interactively affect the organisms is critical to predict the food web dynamics. Here, we investigated the responses of the green alga Scenedesmus obliquus to predation ris...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Xuexia Zhu, Zeshuang Wang, Qiming Zhou, Yunfei Sun, Lu Zhang, Jun Wang, Zhou Yang, Yuan Huang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Allelopathy Colony formation Inducible defense Macrophyte Phytoplankton Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/2b995810c5e5415895057a73644e05fa
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2b995810c5e5415895057a73644e05fa
record_format	dspace
spelling	oai:doaj.org-article:2b995810c5e5415895057a73644e05fa2021-12-01T04:30:05ZSpecies-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus1470-160X10.1016/j.ecolind.2020.106942https://doaj.org/article/2b995810c5e5415895057a73644e05fa2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20308815https://doaj.org/toc/1470-160XPredation and competition are the primary interspecies interactions in aquatic ecosystem. Understanding how these two stressors interactively affect the organisms is critical to predict the food web dynamics. Here, we investigated the responses of the green alga Scenedesmus obliquus to predation risk from zooplankton (Daphnia magna) and to allelopathy from four macrophytes (Cabomba furcate, Nymphoides hydrophylla, Lemna minor and Chara sp.) separately and jointly. Neither the Daphnia-derived cues nor the four macrophyte exudates affected the algal growth rate compared with those in control. Nonetheless, both the two stressors induced the multicelled colony formation in S. obliquus, which was, however, much more strongly induced by the Daphnia cues. In addition, the four macrophytes differentially altered the anti-grazer morphological defense in algae: exudates from Nymphoides and Chara markedly promoted the enhancing effect of Daphnia cues on the eight-celled colonies formation, resulting in the increased number of cells per particle of the algal population. Nonetheless, more four-celled colonies but fewer eight-celled colonies were formed under Lemna exudates exposure, in contrast to the unchanged multicelled colonies growing in Cabomba exudates under Daphnia cues exposure. The results revealed that macrophytes allelopathically disturbed the anti-grazer morphological defense in phytoplankton even though they had no direct impact on algal growth, and this interference was species-specific in macrophyte. As a result, the predator-prey interactions between herbivores and phytoplankton can be potentially changed differently in different macrophyte-dominated freshwaters, contributing to the new cognition of the important role of macrophytes in ecosystem functioning. It suggests that the algal morphology can function as a useful indicator of phytoplankton response to simultaneous stresses from predation and competition.Xuexia ZhuZeshuang WangQiming ZhouYunfei SunLu ZhangJun WangZhou YangYuan HuangElsevierarticleAllelopathyColony formationInducible defenseMacrophytePhytoplanktonEcologyQH540-549.5ENEcological Indicators, Vol 120, Iss , Pp 106942- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Allelopathy Colony formation Inducible defense Macrophyte Phytoplankton Ecology QH540-549.5
spellingShingle	Allelopathy Colony formation Inducible defense Macrophyte Phytoplankton Ecology QH540-549.5 Xuexia Zhu Zeshuang Wang Qiming Zhou Yunfei Sun Lu Zhang Jun Wang Zhou Yang Yuan Huang Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus
description	Predation and competition are the primary interspecies interactions in aquatic ecosystem. Understanding how these two stressors interactively affect the organisms is critical to predict the food web dynamics. Here, we investigated the responses of the green alga Scenedesmus obliquus to predation risk from zooplankton (Daphnia magna) and to allelopathy from four macrophytes (Cabomba furcate, Nymphoides hydrophylla, Lemna minor and Chara sp.) separately and jointly. Neither the Daphnia-derived cues nor the four macrophyte exudates affected the algal growth rate compared with those in control. Nonetheless, both the two stressors induced the multicelled colony formation in S. obliquus, which was, however, much more strongly induced by the Daphnia cues. In addition, the four macrophytes differentially altered the anti-grazer morphological defense in algae: exudates from Nymphoides and Chara markedly promoted the enhancing effect of Daphnia cues on the eight-celled colonies formation, resulting in the increased number of cells per particle of the algal population. Nonetheless, more four-celled colonies but fewer eight-celled colonies were formed under Lemna exudates exposure, in contrast to the unchanged multicelled colonies growing in Cabomba exudates under Daphnia cues exposure. The results revealed that macrophytes allelopathically disturbed the anti-grazer morphological defense in phytoplankton even though they had no direct impact on algal growth, and this interference was species-specific in macrophyte. As a result, the predator-prey interactions between herbivores and phytoplankton can be potentially changed differently in different macrophyte-dominated freshwaters, contributing to the new cognition of the important role of macrophytes in ecosystem functioning. It suggests that the algal morphology can function as a useful indicator of phytoplankton response to simultaneous stresses from predation and competition.
format	article
author	Xuexia Zhu Zeshuang Wang Qiming Zhou Yunfei Sun Lu Zhang Jun Wang Zhou Yang Yuan Huang
author_facet	Xuexia Zhu Zeshuang Wang Qiming Zhou Yunfei Sun Lu Zhang Jun Wang Zhou Yang Yuan Huang
author_sort	Xuexia Zhu
title	Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus
title_short	Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus
title_full	Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus
title_fullStr	Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus
title_full_unstemmed	Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus
title_sort	species-specific effects of macrophytes on the anti-grazer morphological defense in scenedesmus obliquus
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2b995810c5e5415895057a73644e05fa
work_keys_str_mv	AT xuexiazhu speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus AT zeshuangwang speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus AT qimingzhou speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus AT yunfeisun speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus AT luzhang speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus AT junwang speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus AT zhouyang speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus AT yuanhuang speciesspecificeffectsofmacrophytesontheantigrazermorphologicaldefenseinscenedesmusobliquus
_version_	1718405833375612928

Species-specific effects of macrophytes on the anti-grazer morphological defense in Scenedesmus obliquus

Ejemplares similares