Aquatic plants as environmental indicators of ecological condition in New Zealand lakes

Clayton, J. S.; Edwards, T.

doi:10.1007/978-1-4020-5390-0_21

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…The key role of eutrophication in determining macrophyte species composition and growth forms was reported also by other authors (e.g. Janauer et al, 2003;Clayton and Edwards, 2006). Likewise, the importance of substrate on river macrophyte community composition and abundance is in accordance with the findings by Szoszkiewicz et al (2010b) and Schneider et al (2012).…”

Section: P9 Discussionsupporting

confidence: 89%

Parameters structuring macrophyte communities in rivers and lakes – results from a case study in North-Central Poland

Szoszkiewicz

Ciecierska

Kolada

et al. 2014

Knowl. Managt. Aquatic Ecosyst.

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Key-words: macrophytes, lakes, rivers, plant ecology, ecological assessmentWe analysed macrophyte species composition and abundance, water chemistry and hydromorphological parameters of all major river stretches and lakes in the catchment of the lowland river Wel, Poland. We studied (i) which hydromorphological and physico-chemical factors best explained macrophyte species composition, (ii) if environmental factors structuring macrophyte communities were different between rivers and lakes; and (iii) if macrophyte indices developed to indicate eutrophication correlated with nutrient concentrations. Based on two-way indicator species analysis, correlation analysis and canonical correspondence analysis, we found that river substrate was most important in structuring macrophyte species composition and abundance in rivers, while water quality parameters were most important in lakes; species richness and diversity were correlated with river size and substrate type in rivers, but not in lakes; the relative abundance of macrophyte growth forms was best explained by total organic carbon and Secchi depth in lakes, but it was not correlated with any of the water chemical or hydromorphological parameters in rivers. Irrespective of which factors best explained macrophyte community composition, macrophyte metrics developed to indicate ecological status responded most strongly to total phosphorus concentrations, both in rivers and lakes. We conclude that macrophyte metrics are valuable tools for ecological status assessment also in ecosystems where parameters other than nutrients shape macrophyte community composition. RÉSUMÉParamètres structurant les communautés de macrophytes dans les rivières et les lacsrésultats d'une étude de cas dans le Centre-Nord de la Pologne Mots-clés :macrophytes, lacs, rivières, Nous avons analysé la composition spécifique et l'abondance de macrophytes, la chimie de l'eau et les paramètres hydromorphologiques de tous les principaux tronçons des rivières et les lacs du bassin versant de la rivière de plaine Wel, en Pologne. Nous avons étudié, (i) les facteurs hydromorphologiques et physicochimiques qui expliquent le mieux la composition des espèces de macrophytes, (ii) si les facteurs environnementaux structurant les communautés de macrophytes étaient différents entre les rivières et les lacs, et (iii) si les indices macrophytiques développés pour indiquer l'eutrophisation sont corrélés avec les concentrations de nutriments. Basée sur l'analyse des espèces indicatrices, l'analyse de corrélation et l'analyse de correspondance canonique, nous avons trouvé que le substrat de la rivière était plus important dans la structuration de la composition des espèces de macrophytes et leur abondance dans les rivières, tandis que les paramètres de qualité de l'eau étaient les plus importants dans les lacs ; la richesse en espèces et la diversité sont corrélées avec la taille de la rivière et le type de substrat dans les rivières, mais pas dans les lacs ; l'abondance relative des formes de croissance de m...

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Section: P9 Discussionsupporting

confidence: 89%

Parameters structuring macrophyte communities in rivers and lakes – results from a case study in North-Central Poland

Szoszkiewicz

Ciecierska

Kolada

et al. 2014

Knowl. Managt. Aquatic Ecosyst.

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“…These can severely hinder a range of water uses. Dense stands make water bodies unsuitable for a range of recreation activities such as bathing, fishing and boating, while the freefloating mats can block the inflows of hydroelectric power plants and other industrial users of lake and river water, with economic damage as a consequence (Clayton & Edwards, 2006). In hard water areas calcium can encrust Elodea plants and cause damage to boat hulls, a phenomenon reported in Lake Mälaren (Josefsson & Andersson, 2001).…”

Section: Economic / Social Impactsmentioning

confidence: 99%

Modelling the risks of invasive aquatic species spread in Swedish lakes

Weldon¹,

Meriggi²

2023

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Species distribution modelling is a valuable tool for identifying areas most at risk of the spread of invasive species. Here we model the environmental factors governing the distributions of two invasive species of concern that are currently found in Sweden at only a limited number of locations: the aquatic macrophyte Elodea nuttallii (Nuttall’s waterweed / smal vattenpest) and the bivalve Dreissena polymorpha (Zebra mussel / vandrarmussla). For E.nuttallii, the greatest risk factors are connectivity with other water bodies (facilitating dispersion), human population density and length of growing season. This implies that it is principally well-connected lakes in populated areas of southern Sweden that are most at risk of further spread (although other areas of concern are identified). For D.polymorpha, water alkalinity and the proportion of agricultural land (a source of nutrient pollution) are the most important factors, and the models identify lakes Vänern and Vättern, waters in parts of Östergötland, Jämtland and Gotland as key areas of concern for further spread.

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“…The occurrence and abundance of submerged macrophytes are influenced by chemical and physical factors, such as water quality, light availability (Dennison et al, 1993), water transparency, water depth (Canfield et al, 1985), channel slope, channel dimensions (O'Hare et al, 2011), and hydrological regime (Franklin et al, 2008). Understanding how diverse environmental factors affect the habitats of submerged macrophytes is important for flow control, sediment transport (Järvelä, 2005), and assessments of the ecological condition of rivers (Clayton and Edwards, 2006).…”

Section: Introductionmentioning

confidence: 99%

The potential habitats of two submerged macrophytes,Myriophyllum spicatumandHydrilla verticillatain the river ecosystems, South Korea

Son

Cho

Lee

2017

Knowl. Manag. Aquat. Ecosyst.

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-We examined the environmental factors that characterize the habitats of two submerged macrophytes, Myriophyllum spicatum and Hydrilla verticillata, in South Korea using generalized additive models (GAMs). We performed a vegetation survey and measured water depth and water velocity from May to September, 2014September, -2015. Averaged water quality data from the Ministry of Environment's national water quality measurement network from January 2012 to October 2015 were used for modeling. Potential habitats of M. spicatum were linked with chlorophyll a, nitrate nitrogen, suspended solids, water temperature, water depth, and water velocity (deviance explained = 28.7%, accuracy = 74%). In the case of H. verticillata, electrical conductivity and suspended solids were key habitat factors (deviance explained = 23.4%, accuracy = 75%). Model results were highly consistent with observations and field data. Model performances were evaluated by the accuracy rate, the area under the receiver operating characteristic curve, the kappa value, and field verification, and were in generally good agreement. Few studies have evaluated the developed models using the independent field data. By understanding the environmental factors that characterize the habitats for submerged macrophytes, our results contribute to the development of conservation and management strategies for river ecosystems.Keywords: : Eurasian watermilfoil / Hydrilla / water condition / habitat suitability / generalized additive model Résumé -Les habitats potentiels de deux macrophytes submergés, Myriophyllum spicatum et Hydrilla verticillata dans les écosystèmes fluviaux, Corée du Sud. Nous avons examiné les facteurs environnementaux qui caractérisent les habitats de deux macrophytes submergés, Myriophyllum spicatum et Hydrilla verticillata, en Corée du Sud à l'aide de modèles additifs généralisés (GAMs). Nous avons effectué un relevé de la végétation et mesuré la profondeur et la vitesse de l'eau de mai à septembre 2014-2015. Les données moyennes sur la qualité de l'eau provenant du réseau national de mesure de la qualité de l'eau du ministère de l'Environnement pour la période de janvier 2012 à octobre 2015 ont été utilisées pour la modélisation. Les habitats potentiels de M. spicatum étaient liés à la chlorophylle a, au nitrate, aux solides en suspension, à la température de l'eau, à la profondeur et à la vitesse de l'eau (variance expliquée = 28,7 %, précision = 74 %). Dans le cas de H. verticillata, la conductivité électrique et les solides en suspension étaient des facteurs clés de l'habitat (variance expliquée = 23,4 %, précision = 75 %). Les résultats des modèles étaient très cohérents avec les observations et les données de terrain. Les performances du modèle ont été évaluées par le taux de précision, la surface sous la courbe caractéristique de fonctionnement du récepteur, la valeur kappa et la vérification sur le terrain, et elles ont été généralement bien concordantes. Peu d'études ont évalué des modèles élaborés à l'aide des données indépend...

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Aquatic plants as environmental indicators of ecological condition in New Zealand lakes

Cited by 10 publications

References 8 publications

Parameters structuring macrophyte communities in rivers and lakes – results from a case study in North-Central Poland

Parameters structuring macrophyte communities in rivers and lakes – results from a case study in North-Central Poland

Modelling the risks of invasive aquatic species spread in Swedish lakes

The potential habitats of two submerged macrophytes,Myriophyllum spicatumandHydrilla verticillatain the river ecosystems, South Korea

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