Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)

Due to wetland loss, Ottelia cordata (O. cordata, Wallich) Dandy has been categorized as an endangered species on the List of Key Protected Wild Plants in China. Quantifying the relative importance of demographic (i.e., growth, survival, and reproduction) and habitat preference traits on the populat...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yichun Shen, Jinrui Lei, Xiqiang Song, Mingxun Ren
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	abundance demographic traits linear mixed-effect model monthly variation conservation strategy Evolution QH359-425 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/6ca579addbf244378561d862fa1f57c3
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6ca579addbf244378561d862fa1f57c3
record_format	dspace
spelling	oai:doaj.org-article:6ca579addbf244378561d862fa1f57c32021-11-18T09:54:43ZAnnual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)2296-701X10.3389/fevo.2021.688304https://doaj.org/article/6ca579addbf244378561d862fa1f57c32021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fevo.2021.688304/fullhttps://doaj.org/toc/2296-701XDue to wetland loss, Ottelia cordata (O. cordata, Wallich) Dandy has been categorized as an endangered species on the List of Key Protected Wild Plants in China. Quantifying the relative importance of demographic (i.e., growth, survival, and reproduction) and habitat preference traits on the population dynamics (abundance) of O. cordata could guide how to develop the best recovery strategies of O. cordata, yet currently, there are no studies that investigate this. By monitoring monthly changes in O. cordata abundance and demographic traits (plant height, leaf area, flower sex ratio, and seed number) that were highly correlated with growth rate, photosynthetic rate, and water depth, we identified several relationships. Linear mixed-effect models and variance partition quantified the specific effects of four demographic traits and water depth on O. cordata abundance in three habitat types (paddyfield, stream, and spring). The linear mixed-effect models indicate that among the four demographic traits, height could be significantly positively correlated to abundance in all three habitat types. In contrast, other three traits (leaf area, sex ratio, and seed numbers) were non-significantly associated with abundance across each habitat. Height was determined by water depth, so water depth rather than photosynthetic rate and reproduction rate may promote the development and recovery of O. cordata populations. Variance partition results showed that water depth mediated the positive influence of growth rate on the abundance of O. cordata in the living habitats (paddyfield and spring). In contrast, water depth but not growth rate determined the abundance of O. cordata in the living habitat (stream). However, water depth had a significantly negative impact on the abundance of O. cordata in stream habitats, likely because all of the streams were shallow. Altogether, in the short term for avoiding the potential harm or even extinction of O. cordata, keeping appropriate water depth or transplanting O. cordata to spring should be an effective strategy because the water is not only deep enough but also clear in spring habitats. Additionally, water turbidity was shown to affect the density of O. cordata growth, wherein O. cordata was sparsely distributed when turbidity was high. Therefore, in the long run, to make the population gradually recovery, it will be necessary to restore the degraded wetland. This could be accomplished by reducing water pollution and removing sludge to reduce turbidity and increase hydrological connectivity.Yichun ShenJinrui LeiXiqiang SongMingxun RenFrontiers Media S.A.articleabundancedemographic traitslinear mixed-effect modelmonthly variationconservation strategyEvolutionQH359-425EcologyQH540-549.5ENFrontiers in Ecology and Evolution, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	abundance demographic traits linear mixed-effect model monthly variation conservation strategy Evolution QH359-425 Ecology QH540-549.5
spellingShingle	abundance demographic traits linear mixed-effect model monthly variation conservation strategy Evolution QH359-425 Ecology QH540-549.5 Yichun Shen Jinrui Lei Xiqiang Song Mingxun Ren Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)
description	Due to wetland loss, Ottelia cordata (O. cordata, Wallich) Dandy has been categorized as an endangered species on the List of Key Protected Wild Plants in China. Quantifying the relative importance of demographic (i.e., growth, survival, and reproduction) and habitat preference traits on the population dynamics (abundance) of O. cordata could guide how to develop the best recovery strategies of O. cordata, yet currently, there are no studies that investigate this. By monitoring monthly changes in O. cordata abundance and demographic traits (plant height, leaf area, flower sex ratio, and seed number) that were highly correlated with growth rate, photosynthetic rate, and water depth, we identified several relationships. Linear mixed-effect models and variance partition quantified the specific effects of four demographic traits and water depth on O. cordata abundance in three habitat types (paddyfield, stream, and spring). The linear mixed-effect models indicate that among the four demographic traits, height could be significantly positively correlated to abundance in all three habitat types. In contrast, other three traits (leaf area, sex ratio, and seed numbers) were non-significantly associated with abundance across each habitat. Height was determined by water depth, so water depth rather than photosynthetic rate and reproduction rate may promote the development and recovery of O. cordata populations. Variance partition results showed that water depth mediated the positive influence of growth rate on the abundance of O. cordata in the living habitats (paddyfield and spring). In contrast, water depth but not growth rate determined the abundance of O. cordata in the living habitat (stream). However, water depth had a significantly negative impact on the abundance of O. cordata in stream habitats, likely because all of the streams were shallow. Altogether, in the short term for avoiding the potential harm or even extinction of O. cordata, keeping appropriate water depth or transplanting O. cordata to spring should be an effective strategy because the water is not only deep enough but also clear in spring habitats. Additionally, water turbidity was shown to affect the density of O. cordata growth, wherein O. cordata was sparsely distributed when turbidity was high. Therefore, in the long run, to make the population gradually recovery, it will be necessary to restore the degraded wetland. This could be accomplished by reducing water pollution and removing sludge to reduce turbidity and increase hydrological connectivity.
format	article
author	Yichun Shen Jinrui Lei Xiqiang Song Mingxun Ren
author_facet	Yichun Shen Jinrui Lei Xiqiang Song Mingxun Ren
author_sort	Yichun Shen
title	Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)
title_short	Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)
title_full	Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)
title_fullStr	Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)
title_full_unstemmed	Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)
title_sort	annual population dynamics and their influencing factors for an endangered submerged macrophyte (ottelia cordata)
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/6ca579addbf244378561d862fa1f57c3
work_keys_str_mv	AT yichunshen annualpopulationdynamicsandtheirinfluencingfactorsforanendangeredsubmergedmacrophyteotteliacordata AT jinruilei annualpopulationdynamicsandtheirinfluencingfactorsforanendangeredsubmergedmacrophyteotteliacordata AT xiqiangsong annualpopulationdynamicsandtheirinfluencingfactorsforanendangeredsubmergedmacrophyteotteliacordata AT mingxunren annualpopulationdynamicsandtheirinfluencingfactorsforanendangeredsubmergedmacrophyteotteliacordata
_version_	1718420850554699776

Annual Population Dynamics and Their Influencing Factors for an Endangered Submerged Macrophyte (Ottelia cordata)

Ejemplares similares