Response of Bosmina size structure to the acidification and recovery of lakes near Sudbury, Canada

Labaj, Andrew L.; Korosi, Jennifer B.; Kurek, Joshua; Jeziorski, Adam; Keller, W.; Smol, John P.

doi:10.4081/jlimnol.2016.1183

Cited by 12 publications

(15 citation statements)

References 55 publications

(112 reference statements)

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“…Paleolimnological studies suggest that cladoceran and diatom communities in some recovering lakes are not moving back to their historical conditions, but rather they are moving to new states, likely because of climate warming (Labaj et al 2016;Sivaraja et al 2016Sivaraja et al , 2017. increasing the invasibility of northern lakes (Edwards et al 2016;Van Zuiden et al 2016).…”

Section: Shifting Reference Conditionsmentioning

confidence: 99%

Recovery of acidified Sudbury, Ontario, Canada, lakes: a multi-decade synthesis and update

2019

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The Sudbury region of northeastern Ontario, Canada, provides one of the world’s best examples of the resilience of aquatic ecosystems after reductions in atmospheric contaminant deposition. Thousands of lakes around the Sudbury metal smelters were badly damaged by acid deposition. Lakes closest to the smelters were also contaminated by metal particulates. However, large reductions in atmospheric SO2 and metal emissions starting in the early 1970s have led to widespread chemical improvements in these lakes, and recovery has been observed for various aquatic biota. Studies of Sudbury-area lakes are advancing our understanding of chemical and biological lake recovery; however, recovery is a complicated process and much remains to be learned. Biological recovery has often been slow to follow chemical recovery, and it has become apparent that the recovery of lakes from acidification is closely linked to interactions with other large-scale environmental stressors like climate change and Ca declines. Thus, in our multiple-stressor world, recovery may not bring individual lakes back to their exact former state. However, with time, substantial natural biological recovery toward typical lake communities can be reasonably expected for most but not necessarily all biota. For organisms with limited dispersal ability, particularly fish, human assistance may be necessary to re-establish typical communities. In lakes where food webs have been severely altered, re-establishment of typical diverse fish communities may in fact be an important element aiding the recovery of other important components of aquatic ecosystems including zooplankton and benthic macroinvertebrates. In the lakes closest to the smelters, where historically watersheds as well as lakes were severely damaged, the recovery of aquatic systems will be closely linked to ongoing terrestrial recovery and rehabilitation, particularly through the benefits of increased inputs of terrestrially derived organic matter. The dramatic lake recovery observed in the Sudbury area points to a brighter future for these lakes. However, continued monitoring will be needed to determine future changes and help guide the management and protection of Sudbury-area lakes in this multiple-stressor age.

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Section: Shifting Reference Conditionsmentioning

confidence: 99%

Recovery of acidified Sudbury, Ontario, Canada, lakes: a multi-decade synthesis and update

2019

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“…longirostris have shown that increased temperature, acidification, and metal contamination are key factors in enhancing the occurrence of morphotypes with short antennules (Labaj et al, 2016;Sakamoto & Hanazato, 2009 reproductive traits under conditions of toxicant stress (Baird, Barber, & Calow, 1990;Knops, Altenburger, & Segner, 2001). A decline in reproduction may be considered to be directly caused by a harmful factor but the results of our study suggest that low levels of reproduction and long lifespan may be a direct defensive choice in B.…”

Section: Discussionmentioning

confidence: 63%

“…This experiment also showed that morphotypes with low reproductive efficiency are naturally favoured in populations exposed to suboptimal abiotic conditions. A few reports on the influence of abiotic conditions on the phenotypic structure of B. longirostris have shown that increased temperature, acidification, and metal contamination are key factors in enhancing the occurrence of morphotypes with short antennules (Labaj et al, ; Sakamoto & Hanazato, ). In general, these observations are in agreement with our results, for typica , dominant in the NaCl‐population, has quite short appendages.…”

Section: Discussionmentioning

confidence: 99%

Within‐species phenotypic diversity enhances resistance to stress ‐ A case study using the polymorphic species Bosmina longirostris

Adamczuk

Mieczan

2019

Internat Rev Hydrobiol

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Bosmina longirostris is a polymorphic cladoceran, widely distributed throughout the world in temperate and tropical climates, where it colonises all kinds of freshwater bodies regardless of their trophy, acidification, or salinity. In this paper, we test the hypothesis that the ability of B. longirostris to colonise new freshwater bodies results from their maintenance of morphotypes with different life histories. To test the above hypothesis, the life histories of four morphotypes of B. longirostris were analysed through daily observations of individuals cultured separately under uniform optimal conditions. We demonstrated that these morphotypes differed in somatic growth, reproductive effort, lifespan, and fitness, and differences in life histories among morphotypes resulted from the trade‐offs between these parameters. Next, we examined the role of distinct morphotypes (each with specific life‐history) in populations subjected to stress: we maintained two populations of B. longirostris under biotic stress (the presence of invertebrate predators) or abiotic stress (elevated salinity). At the end of the experiment these populations differed from one another in the relative density of morphotypes in comparison with the population cultured in the optimal environment. In populations that suffered from predatory pressure we found an increase in the relative density of morphotypes that grew considerably quicker, had a shorter lifespan, reproduced infrequently but delivered many offspring at each reproductive event. In populations that suffered from elevated salinity, we observed an increase in morphotypes that exhibited low reproductive effort but had the highest survival. Simultaneously, with phenotypic regrouping of populations, morphotypes adapted to novel conditions by altering the expression of life‐history traits. The observed switches in the phenotypic structure of B. longirostris suggest that the persistence of morphotypes with different life histories is beneficial to populations colonising varying environments and their relative abundances in a population are conditioned by the diverseness of local stressors.

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“…Similarly, various empirical studies suggest that B. longirostris is not preferred by fishes because it has a relatively small body size [60]. Bosmina longirostris is more vulnerable to invertebrate predation, such as by copepods, than to predation by fish [61,62]. Thus, B. longirostris can often dominate rivers and streams supported by a high abundance of fishes [61].…”

Section: Behavioral Strategies By Body Size Class Of the Two Cladocermentioning

confidence: 99%

Differences in the Vertical Distribution of Two Cladoceran Species in the Nakdong River Estuary, South Korea

Kim

Choi

2020

Water

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As cladocerans are a primary food source for fish, predator avoidance is important to sustain cladoceran populations. We hypothesized that Bosmina longirostris and Daphniaobtusa would show different vertical distributions that depend on environmental variables and their life cycle phase. Quarterly monitoring was implemented in three water column layers (upper, middle, and bottom) in the Nakdong River Estuary. Cladocerans were mostly observed during summer; B. longirostris and D.obtusa were most abundant and exhibited different vertical distributions. Large (>600 μm) D.obtusa individuals were mainly distributed in the bottom layer (9–11 m) during the daytime and in the upper layer (1–3 m) at night. Utilization of the bottom layer by large D. obtusa was possibly a defense strategy to avoid fish predation. Although the bottom layer was not supported by lower water temperatures and dissolved oxygen than the upper or middle layers, as suggested in the previous study, we assumed that high turbidity replaced this role as a place shunned by fish (and thus a refuge for Daphnia obtusa). In contrast, smaller individuals remained in the upper layer at all times because of the low predation risk. The consumption of B. longirostris by fish was low, as the largest B. longirostris (411 μm) was smaller than the small-sized Daphnia. From this finding, we suggest that the vertical distribution of cladocerans likely depends on selectivity feeding based on fish size rather than the presence/absence of fish. We considered that these results are an important advance in understanding distribution patterns of cladocerans related to environmental features, as well as their key predators.

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Response of Bosmina size structure to the acidification and recovery of lakes near Sudbury, Canada

Abstract: In

Cited by 12 publications

References 55 publications

Recovery of acidified Sudbury, Ontario, Canada, lakes: a multi-decade synthesis and update

Recovery of acidified Sudbury, Ontario, Canada, lakes: a multi-decade synthesis and update

Within‐species phenotypic diversity enhances resistance to stress ‐ A case study using the polymorphic species Bosmina longirostris

Differences in the Vertical Distribution of Two Cladoceran Species in the Nakdong River Estuary, South Korea

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