Taxonomic distinctness poorly reflects floristic quality in a wetland study system

Biomonitoring typically uses taxonomic diversity information while ignoring phylogenetic diversity. Evolutionary relatedness may offer deeper insight to how local assemblages relate with human disturbance and ecological degradation. Degradation of floristic quality may filter species with similar ev...

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Autores principales:	Suneeti K. Jog, Jason T. Bried
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Bioassessment Ecological conservatism Evolutionary relatedness Phylogenetic diversity Phylogenetic clumping Species richness Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/e2ff08d2b1ec4ecaaab1779d15622026
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spelling	oai:doaj.org-article:e2ff08d2b1ec4ecaaab1779d156220262021-12-01T04:34:38ZTaxonomic distinctness poorly reflects floristic quality in a wetland study system1470-160X10.1016/j.ecolind.2020.107086https://doaj.org/article/e2ff08d2b1ec4ecaaab1779d156220262021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20310256https://doaj.org/toc/1470-160XBiomonitoring typically uses taxonomic diversity information while ignoring phylogenetic diversity. Evolutionary relatedness may offer deeper insight to how local assemblages relate with human disturbance and ecological degradation. Degradation of floristic quality may filter species with similar evolutionary traits, whereas intact floristic quality may limit phylogenetic clumping and increase representation of more distantly related taxa. We tested this hypothesis using average taxonomic distinctness (AvTD) and measures of floristic quality (mean ecological conservatism, native species richness, percent exotic species) in vascular plant assemblages of 115 wetlands in the US southern plains. In line with the hypothesis, we observed positive correlations with conservatism (r = 0.28, P = 0.0007) and native richness (r = 0.24, P = 0.0018) and a negative correlation (r = −0.21, P = 0.0169) with exotics, but the plotted relationships looked obscure. A strongly skewed AvTD distribution revealed a clear gradient in lower than expected AvTD. Responses along this gradient covaried with native richness (quadratic model R2 = 0.75) but showed no pattern with conservatism and a weak response to exotics. These results suggest that native richness has potential to predict lower than expected AvTD values. However, attributing these values to degraded floristic quality requires caution when richness is driven by sampling effects such as species-area relationships or has a non-linear relationship to human disturbance. Given the vague correlations and ambiguity of richness, plant taxonomic distinctness may not provide a clear bioindicator for wetlands. More work is needed to elucidate how evolutionary structure may play into bioassessment, which traditionally has been phylogenetically neutral.Suneeti K. JogJason T. BriedElsevierarticleBioassessmentEcological conservatismEvolutionary relatednessPhylogenetic diversityPhylogenetic clumpingSpecies richnessEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107086- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Bioassessment Ecological conservatism Evolutionary relatedness Phylogenetic diversity Phylogenetic clumping Species richness Ecology QH540-549.5
spellingShingle	Bioassessment Ecological conservatism Evolutionary relatedness Phylogenetic diversity Phylogenetic clumping Species richness Ecology QH540-549.5 Suneeti K. Jog Jason T. Bried Taxonomic distinctness poorly reflects floristic quality in a wetland study system
description	Biomonitoring typically uses taxonomic diversity information while ignoring phylogenetic diversity. Evolutionary relatedness may offer deeper insight to how local assemblages relate with human disturbance and ecological degradation. Degradation of floristic quality may filter species with similar evolutionary traits, whereas intact floristic quality may limit phylogenetic clumping and increase representation of more distantly related taxa. We tested this hypothesis using average taxonomic distinctness (AvTD) and measures of floristic quality (mean ecological conservatism, native species richness, percent exotic species) in vascular plant assemblages of 115 wetlands in the US southern plains. In line with the hypothesis, we observed positive correlations with conservatism (r = 0.28, P = 0.0007) and native richness (r = 0.24, P = 0.0018) and a negative correlation (r = −0.21, P = 0.0169) with exotics, but the plotted relationships looked obscure. A strongly skewed AvTD distribution revealed a clear gradient in lower than expected AvTD. Responses along this gradient covaried with native richness (quadratic model R2 = 0.75) but showed no pattern with conservatism and a weak response to exotics. These results suggest that native richness has potential to predict lower than expected AvTD values. However, attributing these values to degraded floristic quality requires caution when richness is driven by sampling effects such as species-area relationships or has a non-linear relationship to human disturbance. Given the vague correlations and ambiguity of richness, plant taxonomic distinctness may not provide a clear bioindicator for wetlands. More work is needed to elucidate how evolutionary structure may play into bioassessment, which traditionally has been phylogenetically neutral.
format	article
author	Suneeti K. Jog Jason T. Bried
author_facet	Suneeti K. Jog Jason T. Bried
author_sort	Suneeti K. Jog
title	Taxonomic distinctness poorly reflects floristic quality in a wetland study system
title_short	Taxonomic distinctness poorly reflects floristic quality in a wetland study system
title_full	Taxonomic distinctness poorly reflects floristic quality in a wetland study system
title_fullStr	Taxonomic distinctness poorly reflects floristic quality in a wetland study system
title_full_unstemmed	Taxonomic distinctness poorly reflects floristic quality in a wetland study system
title_sort	taxonomic distinctness poorly reflects floristic quality in a wetland study system
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/e2ff08d2b1ec4ecaaab1779d15622026
work_keys_str_mv	AT suneetikjog taxonomicdistinctnesspoorlyreflectsfloristicqualityinawetlandstudysystem AT jasontbried taxonomicdistinctnesspoorlyreflectsfloristicqualityinawetlandstudysystem
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Taxonomic distinctness poorly reflects floristic quality in a wetland study system

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