Diatom assemblages distribution in catalan rivers, NE Spain, in relation to chemical and physiographical factors

Leira, Manel; Sabater, Sergi

doi:10.1016/j.watres.2004.08.034

Cited by 120 publications

(79 citation statements)

References 23 publications

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“…P-PO 4 , pH, and annual temperature were identified as important environmental variables. This result confirmed again that lotic algal community is tightly coupled with chemical properties of water (Leira and Sabater 2005;Duong et al 2006;Soininen 2007). However, these environmental variables influenced algal assemblages mainly in combination with spatial variables, leading to higher proportion of spatially related joint effects than that of unique contributions.…”

Section: Discussionsupporting

confidence: 78%

Disentangling the roles of spatial and environmental variables in shaping benthic algal assemblages in rivers of central and northern China

Tang

et al. 2013

Aquat Ecol

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Benthic algae were collected from central and northern Chinese rivers to test the hypothesis that geographic location has significant contributions in shaping algal assemblages. We used Moran's eigenvector maps (MEM) to model spatial components and variation partitioning to quantify the influences of spatial and environmental variables on regional patterns of algal richness and community composition, respectively. We found that variation in algal richness was attributed to MEM component 2, 8, and 9 and the quadratic term of N-NO 3 . Regarding abundance data, latitude, longitude, and MEM component 1, 2, and 7 were important spatial variables. Although P-PO 4 , pH, and annual mean temperature were significant environmental variables influencing algal community composition, they were all spatially structured. Among the total explained variance in both algal metrics, spatial proportions were higher than that of environmental variables. We also found that abundant species of Achnanthidium minutissimum, Cocconeis placentula, Cymbella delicatula, Cymbella affinis, Cymbella turgidula, and Synedra ulna displayed clear spatially related patterns. In conclusion, the contributions of spatial and environmental variables to regional variation of algal assemblages are scaledependent. As for our study scale (*1,000 km), spatial control may be more important. Since spatial effects could obscure local environmental impacts on algal communities, appropriate study scale and statistical methods should be taken into account in algal bioassessment. We recommend inclusion of both algal richness and community composition in study of algal Handling Editor: Piet Spaak

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Section: Discussionsupporting

confidence: 78%

Disentangling the roles of spatial and environmental variables in shaping benthic algal assemblages in rivers of central and northern China

Tang

et al. 2013

Aquat Ecol

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“…Tornés et al, 2007). Indeed, pollution is often considered as homogenising species composition (Leira and Sabater, 2005;Pan et al, 1999;Tornés et al, 2007). But pollution was not the overriding parameter in our study area since high altitude lakes are upstream most of human activities.…”

Section: Local Factors Impact More Diatom Communities Composition Thamentioning

confidence: 82%

“…Pan et al, 2000;Leira and Sabater, 2005;Tornés et al, 2007). Therefore, because high-altitude lakes are profuse and known to be pristine, these ecosystems appear to be good study sites to analyze the influence of natural parameters on benthic diatoms communities.…”

Section: Introductionmentioning

confidence: 99%

Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Feret¹,

Bouchez²,

Rimet³

2017

Ann. Limnol. - Int. J. Lim.

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-Altitude lakes are weakly impacted by human activities. This makes them choice ecosystems to understand how biological communities are impacted by natural factors. This question was addressed to littoral benthic diatoms, a largely used ecological indicator. We wanted to know if benthic diatoms in lakes are more impacted by local varying factors (altitude, lake depth...) or regional varying factors (geology). The study area takes place in the Northern French Alps. Littoral benthic diatoms of 63 natural lakes situated between 1350 and 2700 m · a.s.l. were sampled. Two categories of communities were observed: one of deep and lower altitude lakes and one of higher altitude and shallower lakes. In each category, communities were characterized and were corresponding to particular lake types: lakes dominated by a particular geology, lakes with a water level fluctuation, turbid lakes,... Communities did not show a spatial structure. We observed that local factors were more important than regional factors. Indeed, the study area displayed a mixed geology even at a local level. On another hand, altitude a local varying factor determines freezing period a determining item of high-altitude lake functioning.

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“…1, and also see the Appendix). The major diatom species present in Korean rivers and streams have been recorded in rivers throughout the world, including China (Wu et al, 2009), Hong Kong (Dickman et al, 2005), Japan (Watanabe et al, 1986), the USA (Potapova and Charles, 2003), Spain (Leira and Sabater, 2005), Italy (Bona et al, 2007), Germany (Werner and Ko¨hler, 2005), and Finland (Soininen et al, 2004).…”

Section: Discussion Taxonomic Compositionmentioning

confidence: 99%

“…Many studies have reported a wide distribution of benthic diatoms (Watanabe et al, 1990;Choi et al, 1995;Leland and Porter, 2000;Weckstro¨m and Korhola, 2001;Potapova and Charles, 2002;Soininen et al, 2004;Leira and Sabater, 2005;Bona et al, 2007;Wu et al, 2009) and their tolerance to gradients of diverse environmental variables (Watanabe et al, 1990;Potapova and Charles, 2002). However, other studies have reported that some species only occur in particular geographical locations, water bodies, or micro-habitats (Kociolek and Spaulding, 2000).…”

Section: Introductionmentioning

confidence: 99%

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

Hwang

Kim

Yoon

et al. 2011

Ann. Limnol. - Int. J. Lim.

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-The diatoms are an ecologically important group of algae that have been extensively studied by ecologists and taxonomists. However, the large-scale patterns of diatom distribution and the factors underlying this distribution are largely unknown. The aims of this study were to identify the large-scale spatial patterns of benthic diatom assemblages in Korean streams and rivers, and to assess the importance of numerous environmental factors on diatom distribution. We classified 720 study sites based on diatom flora. Benthic diatoms, water chemistry, altitude, and riparian land cover and use were characterized by multivariate analyses, Monte Carlo permutation tests, and indicator species analysis. In total, we identified 531 diatom taxa. Diatom assemblages were mostly dominated by species of the genera Achnanthes, Navicula, Nitzschia, Cocconeis, Fragilaria (Synedra included), Cymbella, Gomphonema, and Melosira. Cluster analysis partitioned all 720 sites into eight groups based on diatom species composition. Canonical correspondence analysis indicated that altitude, land cover and use, current velocity, electrical conductivity, and nutrient levels explained a significant amount of the variation in the composition of assemblages of benthic diatoms. At the national scale, a downstream ecological gradient was apparent, from fast-flowing, mostly oligotrophic highland streams to slow-flowing, mostly eutrophic lowland rivers. Our data suggest that spatial factors explain some of the variation in diatom distribution. The present investigation of the spatial patterns of benthic diatoms, the ecological determinants of diatom occurrence, and the identification of diatom indicator species contributes to development of a program for assessing the biological integrity of lotic ecosystems in Korea.

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Diatom assemblages distribution in catalan rivers, NE Spain, in relation to chemical and physiographical factors

Cited by 120 publications

References 23 publications

Disentangling the roles of spatial and environmental variables in shaping benthic algal assemblages in rivers of central and northern China

Disentangling the roles of spatial and environmental variables in shaping benthic algal assemblages in rivers of central and northern China

Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

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