Dispersal of freshwater algae — a review

Kristiansen, Jørgen

doi:10.1007/978-94-017-0908-8_15

Cited by 122 publications

(154 citation statements)

References 28 publications

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“…Mass effects that most algal species present in environmentally suboptimal sites due to their powerful dispersal ability could contribute to spatial patterns (Leibold et al 2004;Holyoak et al 2005;Logue et al 2011). Algal species smaller in size should be more widely distributed than larger ones because they should provide more propagules for colonization and be more efficiently dispersed via stream flow, wind, or animal vectors (Kristiansen 1996;Heino and Soininen 2006). This opinion is supported by the fact that dominant species of A. minutissimum, C. delicatula, and C. affinis are small ones that also frequently appear in other streams.…”

Section: Discussionmentioning

confidence: 99%

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: Discussionmentioning

confidence: 99%

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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“…In our study, the interchange of water between the two adjacent lakes appears to represent an important factor for the exchange of homogeneous genetic strains. In addition, other natural and anthropogenic factors could have effectively favoured the exchange of different phytoplankton and cyanobacteria populations between the two lakes (Kristiansen, 1996;Nehring, 1998). In fact, we cannot exclude a priori the occurrence of damages and cell lysis in populations of Planktothrix passing through the pumping systems connecting the two water bodies.…”

Section: Discussionmentioning

confidence: 99%

Strict coupling between the development ofPlanktothrix rubescensand microcystin content in two nearby lakes south of the Alps (lakes Garda and Ledro)

Salmaso

Adriano

Shams

et al. 2013

Ann. Limnol. - Int. J. Lim.

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-Cyanobacteria and their principal cyanotoxins were studied in the largest Italian lake (Lake Garda, 65 m a.s.l.) and in a near smaller reservoir (Lake Ledro, 652 m a.s.l.). The two lakes share a fraction of water due to a pipe pumping water from and into the lakes and the same dominant cyanobacterial species (Planktothrix rubescens). Despite the differences in the concentrations of cyanotoxins (mostly microcystins, MCs) and biovolumes of P. rubescens (BV Pr ) (over one order of magnitude), the Bayesian analyses linking these two variables showed striking similarities, suggesting the existence of similar toxic genotypes colonizing the two water bodies and a constitutive MC production. It was stressed that a greater sensitivity and reliability in the management strategies aimed at minimizing the risks due to cyanobacteria should also contemplate the use of specific lake-tailored models linking MCs and BV Pr .

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“…Immigration of phytoplankton species in a new environment firstly depends on the ability to disperse over the physical barrier represented by the surrounding dry land. Although dispersal mechanisms for phytoplankton are quite elusive, some evidences exist on the role exerted by wind and aquatic birds as potential dispersal agents (Kristiansen, 1996b;Genitsaris et al, 2011;Incagnone et al, 2015). As stated by Stoyneva (this volume), occasional and isolated findings of phytoplankton species in a given environment often occur and represent a ''proof of dispersal,'' even though these events do not lead to the establishment of a permanently resident population.…”

Section: Distances In Situ Environmental Filters and Dispersal Agentsmentioning

confidence: 99%

Blowing in the wind: how many roads can a phytoplanktont walk down? A synthesis on phytoplankton biogeography and spatial processes

Naselli-Flores

Padisák

2015

Hydrobiologia

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The selected theme of the 17th Workshop of the International Association for Phytoplankton Taxonomy and Ecology (IAP), ''Biogeography and Spatial Patterns of Biodiversity of Freshwater Phytoplankton,'' offered the opportunity to explore one neglected aspect of phytoplankton ecology: the distribution of species in the geographic space. This paper summarizes the outcomes of 20 selected contributions among those presented at the workshop. The articles report the results from studies carried out in five continents (only Oceania is not represented) and on a wide array of aquatic ecosystems (deep and shallow natural lakes, man-made lakes, temporary and permanent ponds, rivers). The topics analyzed by the contributors are related to Island Biogeography paradigms, dispersal vectors, survival strategies, environmental filters, dispersal distances, vertical and horizontal spatial variability of phytoplankton between and within water bodies, and of course, invasive algae. The overall analysis of the results presented clearly demonstrates that, as for many others organisms, there are ''rules'' governing freshwater phytoplankton spatial patterns and that these organisms also have a true biogeography, as nowadays is quite evident for several other groups in the same range of size. We can definitively conclude that the statement ''Everything is everywhere'' is obsolete, even though human activities tend to homogenize species distribution in the biosphere.

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Dispersal of freshwater algae — a review

Cited by 122 publications

References 28 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

Strict coupling between the development ofPlanktothrix rubescensand microcystin content in two nearby lakes south of the Alps (lakes Garda and Ledro)

Blowing in the wind: how many roads can a phytoplanktont walk down? A synthesis on phytoplankton biogeography and spatial processes

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