Bioassessment in a metacommunity context: Are diatom communities structured solely by species sorting?

Vilmi, Annika; Karjalainen, Satu Maaria; Hellsten, Seppo; Heino, Jani

doi:10.1016/j.ecolind.2015.11.043

Cited by 54 publications

(46 citation statements)

References 60 publications

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“…In dispersal limitation, some species are absent from sites because of dispersal barriers or limited time to reach a site (Heino et al ). In contrast, in mass effects, high dispersal rates may homogenize biological communities among nearby sites (Tolonen et al in press) and lead to spatial autocorrelation in community composition (Vilmi et al ). Spatial autocorrelation may also result from the possibility that there are spatially structured environmental variables missing in the study (Dray et al ).…”

Section: Discussionmentioning

confidence: 99%

Ecological drivers of multiple facets of beta diversity in a lentic macroinvertebrate metacommunity

Heino

Tolonen

2017

Limnology & Oceanography

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Community ecology has broadened considerably with the recognition that it is not only at the species‐level data where biological patterns and their determinants should be studied. Rather, also functional and phylogenetic data should be examined, as they may provide important information for both basic ecology and applied fields such as conservation and bioassessment. We thus explored the distance decay of taxonomic, functional, and phylogenetic community compositions along spatial and environmental gradients within a boreal lake metacommunity. We used distance‐based methods (i.e., Mantel test, Mantel correlograms and db‐RDA) to examine different facets (i.e., taxonomic, functional, and phylogenetic) and components (i.e., total, turnover and nestedness‐resultant) in relation to spatial and environmental variables. We found that the species compositions of lake benthic invertebrate communities varied mostly along environmental gradients, but were also weakly related to spatial distances between lakes. We also showed that functional and phylogenetic compositions were solely related to environmental variation across the lakes, but these relationships were generally weak. Our exploration of different facets and components of beta diversity added to the knowledge of lake invertebrate communities by adding functional and phylogenetic views, which has rarely been done in studies of aquatic metacommunities. Such information is also important in valuing lakes for conservation and bioassessment because it is not only at the species‐level data where ecological patterns and underlying mechanisms should be explored.

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Section: Discussionmentioning

confidence: 99%

Ecological drivers of multiple facets of beta diversity in a lentic macroinvertebrate metacommunity

Heino

Tolonen

2017

Limnology & Oceanography

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“…Previous studies in highly‐connected aquatic systems have found community structuring to vary from the predominance of environmental conditions (Cottenie and De Meester , Cottenie et al , Okuda et al ) to situations where spatial processes prevail (Strecker et al , Bertolo et al , Vilmi et al ). Fish community studies have observed year‐to‐year changes from the predominance of spatial to the dominance of local environmental conditions, which suggest that the importance of spatial processes may be transient (Strecker et al , Bertolo et al ).…”

Section: Discussionmentioning

confidence: 99%

“…Most previous studies on environmental control versus spatial structuring of lentic community composition have been conducted at among‐lake scales over varying spatial extents (Pinel‐Alloul et al , Verleyen et al , Heino , Mehner et al ). On the other hand, only a few studies have focused on environmental versus spatial community structuring at the within‐lake scale (Brind'Amour et al , Strecker et al , Bertolo et al , Vilmi et al ) or in discrete lentic systems with high connectivity among sites (Cottenie and De Meester , Cottenie et al ). It is hence unclear if among‐lake studies show patterns different from those conducted within a single large lake system.…”

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confidence: 99%

Ignoring spatial effects results in inadequate models for variation in littoral macroinvertebrate diversity

Tolonen

Vilmi

Karjalainen

et al. 2016

Oikos

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Studies focusing on the effects of spatial processes versus environmental filtering on aquatic metacommunities have so far been focused almost entirely on relatively isolated systems, such as sets of different lakes or streams. In contrast, metacommunity patterns and underlying processes within a single aquatic system have received less attention. In this study, we aimed to examine how strongly variations in different diversity indices are affected by spatial processes (dispersal) versus local environmental conditions (species sorting) within a large lake system. Modern biodiversity research focuses on multiple diversity facets because different indices may be uncorrelated within and between facets, and they may thus describe different phenomena. We investigated the relationship of littoral macroinvertebrate diversity with environmental and spatial factors using 10 indices of species, functional and taxonomic diversity. Using spatial factors as proxies of dispersal, we decomposed variation in diversity indices into fractions attributable to environmental and spatial factors. Our results highlighted generally equal or higher importance of spatial processes in controlling the variation in diversity indices when compared to local environmental variables. Local environmental conditions accounted for higher proportion of variation only in a single index (i.e. taxonomic diversity). These findings suggest that the effects of high dispersal rates (mass effects) may override the influences of local environmental conditions (species sorting) on the diversity in highly-connected aquatic system, such as large lakes and marine coastal systems. Our results further suggest that biodiversity assessment and environmental monitoring in highly-connected systems cannot rely solely on the idea of environmental control. We hence recommend that the roles of both environmental and spatial processes should be integrated in basic and applied ecological research of aquatic systems.

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“…Different observations are presented in the literature regarding the key drivers of diatom metacommunities in freshwater ecosystems. Vilmi et al (2016) found that diatom community structures in a large, well-connected lake system were determined by shared effects of both spatial and local environmental factors instead of pure environmental effects. They showed that the pure spatial effects interfered with environmental variables due to dispersal processes.…”

Section: Key Components Of Deterministic Mechanismsmentioning

confidence: 98%

Structuring forces and β-diversity of benthic diatom metacommunities in soda pans of the Carpathian Basin

Szabó

Lengyel

Padisák

et al. 2018

European Journal of Phycology

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Small soda lakes represent one of the most vulnerable ecosystem types due to their high hydrological sensitivity to climate change and anthropogenic interventions. Since diatoms are excellent bioindicators, determining the β-diversity and the structuring dynamics of diatom metacommunities can provide valuable information for conservation planning of soda pans. In this study, two diatom metacommunities were surveyed monthly in a one-year period from distinct regions of the Carpathian basin: the Fertő-Hanság National Park (FH) between 2013 and 2014, and the Danube-Tisza Interfluve (DT) between 2014 and 2015. We explored whether β-diversity of diatom assemblages in the two regions is enhanced by species turnover or nestedness (related to richness differences) and investigated the role of deterministic and stochastic processes in shaping β-diversity patterns. Furthermore, we evaluated the contribution of environmental variables, geographic distance and temporal variation to community structure. High β-diversity (> 90%) was revealed for both metacommunities, and was maintained primarily by species turnover. Within the metacommunity of the DT where the natural hydrological cycle of soda pans is not disturbed, diatom communities assembled mainly by the selection force of environment at spatiotemporal scale. In the soda pans located in the habitat reconstruction area of the FH, besides species-sorting, significant temporal variation in community structure appeared due to the water management and periodic water supply. Our results point to the need for a conservation management strategy which maintains the natural hydrological regime of small saline lakes, and therefore their habitat heterogeneity which is of high conservation value.

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Bioassessment in a metacommunity context: Are diatom communities structured solely by species sorting?

Cited by 54 publications

References 60 publications

Ecological drivers of multiple facets of beta diversity in a lentic macroinvertebrate metacommunity

Ecological drivers of multiple facets of beta diversity in a lentic macroinvertebrate metacommunity

Ignoring spatial effects results in inadequate models for variation in littoral macroinvertebrate diversity

Structuring forces and β-diversity of benthic diatom metacommunities in soda pans of the Carpathian Basin

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