Distribution patterns of epilithic diatoms along climatic, spatial and physicochemical variables in the Baltic Sea

Virta, Leena; Soininen, Janne

doi:10.1186/s10152-017-0496-9

Cited by 8 publications

(13 citation statements)

References 51 publications

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“…The initial similarity (IS) refers to the dissimilarity index value at a spatial distance of 1 m. Shown is also the coefficient of correlation between environmental and spatial distance (distance r) in each month. The statistical significance of the variables is based on the p value: *p < 0.05, **p < 0.01, ***p < 0.001 2012; Bottin et al 2014;Virta and Soininen 2017). Both environmental and spatial distances were related with community similarities in each month also here even when the other variable group was controlled for.…”

Section: Distance Decay Of Community Similaritymentioning

confidence: 99%

High diatom species turnover in a Baltic Sea rock pool metacommunity

2019

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Different metacommunity perspectives have been developed to describe the relationship between environmental and spatial factors and their relative roles for local communities. However, only little is known about temporal variation in metacommunities and their underlying drivers. We examined temporal variation in the relative roles of environmental and spatial factors for diatom community composition among brackish-watered rock pools on the Baltic Sea coast over a 3-month period. We used a combination of direct ordination, variation partition, and Mantel tests to investigate the metacommunity patterns. The studied communities housed a mixture of freshwater, brackish, and marine species, with a decreasing share of salinity tolerant species along both temporal and spatial gradients. The community composition was explained by both environmental and spatial variables (especially conductivity and distance from the sea) in each month; the joint effect of these factors was consistently larger than the pure effects of either variable group. Community similarity was related to both environmental and spatial distance between the pools even when the other variable group was controlled for. The relative influence of environmental factors increased with time, accounting for the largest share of the variation in species composition and distance decay of similarity in July. Metacommunity organization in the studied rock pools was probably largely explained by a combination of species sorting and mass effect given the small spatial study scale. The found strong distance decay of community similarity indicates spatially highly heterogeneous diatom communities mainly driven by temporally varying conductivity gradient at the marine-freshwater transition zone.

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Section: Distance Decay Of Community Similaritymentioning

confidence: 99%

High diatom species turnover in a Baltic Sea rock pool metacommunity

2019

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“…grazing pressure) covarying with pool distance to the sea. The secondary importance of local environmental variables on diatom richness disagrees with Virta and Soininen ( 2017 ), who found that diatom richness in the Baltic Sea was best explained by pH and nutrients. In contrast to diatoms, variation in both cyanobacteria and non-cyanobacteria richness across the pools was most strongly related to TP, agreeing with earlier studies on the importance of nutrient availability on bacterial richness (Wang et al .…”

Section: Discussionmentioning

confidence: 64%

“…Navicula perminuta and T. fasciculata have been found to occur along a wide salinity range, with increasing relative abundances towards higher salinities also in the Baltic Sea area (Ulanova, Busse and Snoeijs 2009 ). Likewise, D. moniliformis has an apparently wide salinity tolerance as it is common in the Baltic Sea (Virta and Soininen 2017 ), but also found in freshwater ecosystems with elevated conductivity (Krammer and Lange-Bertalot 1991a ).…”

Section: Discussionmentioning

confidence: 99%

Factors influencing the biodiversity of three microbial groups within and among islands of the Baltic Sea

Teittinen

Virta

et al. 2021

FEMS Microbiology Ecology

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Islands provide ideal model systems to examine the factors influencing biodiversity, yet knowledge of microbial biodiversity on islands remains scarce. We collected a dataset from 101 rock pools along a freshwater to brackish water transition on islands of the Baltic Sea and investigated the patterns and drivers of community composition and species richness of diatoms, cyanobacteria, and non-cyanobacteria bacteria among islands. We also examined whether environmental heterogeneity increased beta diversity and species richness within islands. Among islands, the patterns in community composition were concordant among the microbial groups, with distinct changes along the freshwater–brackish gradient. The patterns in species richness were context dependent for each microbial group. In general, richness patterns were most strongly associated with nutrient concentrations or the distances to potential sources of immigrants, whereas no positive relationships between ecosystem size and richness were found. Within islands, environmental heterogeneity was positively correlated with beta diversity of each microbial group, but not species richness. Our findings provide novel insights into the factors influencing microbial biodiversity. The results suggest that island microbial biodiversity patterns are influenced by species sorting and dispersal-related mechanisms and highlight the importance of environmental heterogeneity for beta diversity.

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Section: Introductionmentioning

confidence: 99%

“…In recent years, investigations of factors and regularities of distribution of b sity of organisms at different levels of organization became especially relevant Such investigations are not only of ecological but also evolutionary importan Geographical, physicochemical, climatic and historical factors may be the most im for the distribution of protists [34,[36][37][38]. The majority of these investigations dea the analysis of biotopes either within one continent [36,37] or within one wate [34,38]. Although there are few studies studies on intercontinental factors and r In recent years, investigations of factors and regularities of distribution of biodiversity of organisms at different levels of organization became especially relevant [34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Dispersal of Silica-Scaled Chrysophytes in Northern Water Bodies

2021

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Silica-scaled chrysophytes have an ancient origin; nowadays they inhabit many northern water bodies. As the territories above the 60th parallel north were under the influence of glaciers during the Late Pleistocene, the local water bodies and their microalgal populations formed mainly during the Early Holocene. Now, the arctic, sub-arctic and temperate zones are located here and the water bodies in these regions have varying environmental characteristics. We analyzed the dispersal of silica-scaled chrysophytes in 193 water bodies in 21 northern regions, and for 135 of them determined the role of diverse environmental factors in their species composition and richness using statistical methods. Although the species composition and richness certainly depend on water body location, water temperature and conductivity, regions and individual water bodies with similar species composition can be significantly distant in latitudinal direction. Eighteen species and one variety from 165 taxa occurring here have clear affinities to fossil congeners; they have been encountered in all regions studied and amount to 6–54% of the total number of silica-scaled chrysophytes. We also compared the distribution of the species with a reconstruction of glacier-dammed lakes in the Northern Hemisphere in the Late Pleistocene–Early Holocene. The dispersal of silica-scaled chrysophytes in the northern water bodies could take place in the Late Pleistocene–Early Holocene over the circumpolar freshwater network of glacier-dammed lakes, the final Protista composition being subject to the environmental parameters of each individual water body and the region where the water body is located. This species dispersal scenario can also be valid for other microscopic aquatic organisms as well as for southerly water bodies of the Northern Hemisphere.

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Distribution patterns of epilithic diatoms along climatic, spatial and physicochemical variables in the Baltic Sea

Cited by 8 publications

References 51 publications

High diatom species turnover in a Baltic Sea rock pool metacommunity

High diatom species turnover in a Baltic Sea rock pool metacommunity

Factors influencing the biodiversity of three microbial groups within and among islands of the Baltic Sea

Dispersal of Silica-Scaled Chrysophytes in Northern Water Bodies

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