Isolation vs. Extinction in the Assembly of Fishes in Small Northern Lakes

Magnuson, John J.; Tonn, William M.; Banerjee, A.; Toivonen, Jorma; Sánchez, Oliva López; Rask, Martti

doi:10.2307/176528

Cited by 77 publications

(131 citation statements)

References 34 publications

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“…For example, regions themselves differ in the constraints set by the regional limnology for the biota (i.e., ranges in abiotic conditions among water bodies vary between regions and drainage systems, leading to the im-portance of different environmental filters in different regions). Our finding that species richness in the two stream diatom data sets showed significant responses to differing environmental gradients may indeed indicate that the relative influence of different environmental factors varies in different regions, concurring with former findings for lake fish (Magnuson et al 1998) and stream invertebrates (Heino et al 2003b). Similarly, the range in environmental conditions along which the biota is surveyed per se may affect our perception of the importance of different environmental gradients in accounting for biodiversity.…”

Section: Discussionsupporting

confidence: 90%

“…The latter hypothesis seems intuitive in a situation in which the increase in species richness is not related to an increase in species from higher taxonomic levels, as opposed to a situation in which the increase in species richness is the consequence of an increase in the taxonomic breadth of the community. Although the community-environment relationships of many groups of freshwater organisms are increasingly well studied (e.g., Malmqvist and Mäki 1994;Magnuson et al 1998;Soininen et al 2004), less attention has been directed to more comparable aspects of biodiversity: for example, species richness and taxonomic distinctness. The existing information on the biodiversity patterns of freshwater organisms indicates, however, that certain generalities are to be expected along environmental gradients.…”

Section: Acknowledgmentsmentioning

confidence: 99%

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The relationship between species richness and taxonomic distinctness in freshwater organisms

Heino

Soininen

Lappalainen

et al. 2005

Limnology & Oceanography

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Taxonomic distinctness is a newer biodiversity measure that emphasizes the average taxonomic relatedness between species in a community. We examined whether species richness (SR) and taxonomic distinctness (TD) were significantly related and whether they showed similar environmental relationships in regional data sets for various groups of freshwater organisms, ranging from lake mollusks and fishes to stream diatoms and invertebrates. We found that the relationship between SR and TD varied widely, ranging from significantly negative through nonsignificant to significantly positive. In general, SR and TD were related to different environmental gradients, although the particular environmental variables accounting for biodiversity patterns varied among data sets and, more importantly, even between different data sets for the same organism groups. SR and TD can provide complementary views of the variability of biodiversity. These findings thus underline the importance of considering a set of different measures in the assessment of community-level biodiversity, as well as considering this variability when determining anthropogenic effects in freshwater ecosystems.

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Section: Discussionsupporting

confidence: 90%

Section: Acknowledgmentsmentioning

confidence: 99%

The relationship between species richness and taxonomic distinctness in freshwater organisms

Heino

Soininen

Lappalainen

et al. 2005

Limnology & Oceanography

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“…Instead, RDA suggested that the mechanism of community change at many sites involved increased winter or spring minimum temperatures that favored higher abundances of littoral taxa. Unfortunately, these analyses cannot determine whether the beneficial effects of warming and reduced ice cover increased littoral abundance (cf., Magnuson et al 2000) or whether warm conditions promoted deep-water anoxia (Babin and Prepas 1985) and declines in the relative abundance of profundal species. Winter anoxia is common in these (Hammer 1971) and other prairie lakes (Barica and Mathias 1979;Baird et al 1987) and could be an important control of chironomid community structure.…”

Section: Discussionmentioning

confidence: 99%

“…There is increasing evidence that lake chemistry and biology, as well as their responsiveness to human activities and climate, depend on lake position within a hydrologic landscape (Kratz et al 1997;Magnuson et al 1998;Rusak et al 1999;Sorrano et al 1999). For example, lake water conductivity, alkalinity, nutrient content, and algal biomass increase in a downstream direction within the Qu'Appelle and other agricultural drainages, whereas water transparency declines (Soranno et al 1999).…”

Section: Landscape Patterns Of Invertebrate Community Change-mentioning

confidence: 99%

Landscape effects of climate, agriculture, and urbanization on benthic invertebrate communities of Canadian prairie lakes

Quinlan

Leavitt

Dixit

et al. 2002

Limnology & Oceanography

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Paleoecological analyses of fossil chironomid assemblages from eight lakes of the Qu'Appelle Valley, Saskatchewan, Canada, were used to quantify the relative influence of climate, resource use, and urbanization on benthic invertebrate communities 1850-1995. Fossil analyses inferred that Qu'Appelle lakes are naturally productive but that invertebrate communities were altered by agriculture and urbanization. In western lakes, rates of community change (chord distance per 5 yr) were low and nonsignificant (P Ͼ 0.05) prior to European settlement, but increased twofold after ϳ1930-1940. In contrast, uniformly significant rates of community change were recorded in eastern downstream lakes only after the 1960s. In both cases, high rates of change corresponded to alterations in the balance between deep-water (Chironomus) and littoral species (Cladotanytarsus mancus group, Tanytarsus s.lat. [s.l.]).Comparison of historical and fossil time series (ϳ1920-1993) using variance partitioning analysis (VPA) explained up to 86.6% of past variations in chironomid community composition. Unexpectedly, climate (winter temperature) explained a significant (P Ͻ 0.05) and substantial (mean Ϯ SD, n ϭ 8; 24.8 Ϯ 21.9%) amount of community variance at all sites except Round Lake. In contrast, land-use practices exhibited significant but less substantial (6.7 Ϯ 6.1%, n ϭ 8) impacts on zoobenthos of five lakes, whereas significant urban impacts (3.6 Ϯ 7.5%, n ϭ 8) were recorded only at two sites. Similarly, redundancy analysis showed that minimum winter or spring temperature significantly influenced the relative abundance of littoral taxa in seven lakes. Such strong effects of climate on benthic invertebrate communities contrast its weak effects on phytoplankton in these lakes and suggest that future environmental change may be expressed differentially among habitats.

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“…Although various factors may explain this correlation (Van Geest et al, 2003), suppression of fish in smaller lakes may be a common factor. Fish are rare in small, isolated lakes, probably as a result of a higher likelihood of fish kills combined with their low colonizing ability (Tonn & Magnuson, 1982;Dahl, 1990;Magnuson et al, 1998;Hershey et al, 1999). Two recent studies exemplify this.…”

Section: Lake Depthmentioning

confidence: 99%

Shallow lakes theory revisited: various alternative regimes driven by climate, nutrients, depth and lake size

2007

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Shallow lakes have become the archetypical example of ecosystems with alternative stable states. However, since the early conception of that theory, the image of ecosystem stability has been elaborated for shallow lakes far beyond the simple original model. After discussing how spatial heterogeneity and fluctuation of environmental conditions may affect the stability of lakes, we review work demonstrating that the critical nutrient level for lakes to become turbid is higher for smaller lakes, and seems likely to be affected by climatic change too. We then show how the image of just two contrasting states has been elaborated.

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Isolation vs. Extinction in the Assembly of Fishes in Small Northern Lakes

Cited by 77 publications

References 34 publications

The relationship between species richness and taxonomic distinctness in freshwater organisms

The relationship between species richness and taxonomic distinctness in freshwater organisms

Landscape effects of climate, agriculture, and urbanization on benthic invertebrate communities of Canadian prairie lakes

Shallow lakes theory revisited: various alternative regimes driven by climate, nutrients, depth and lake size

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