Fish and land use influence Gammarus lacustris and Hyalella azteca (Amphipoda) densities in large wetlands across the upper Midwest

Anteau, Michael J.; Afton, Alan D.; Anteau, Andrea C. E.; Moser, E. Barry

doi:10.1007/s10750-010-0583-2

Cited by 38 publications

(15 citation statements)

References 38 publications

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“…Alternatively, one may hypothesize that predation has indirectly affected the metabolic scaling of G. minus by reducing its population density (as appears to have occurred in our study springs; D. S. Glazier, personal observations; also see Wooster 1998, Anteau et al 2011, Winkelmann et al 2011, thereby possibly increasing the amount of food available per individual (cf. Reznick et al 2001).…”

Section: Discussionmentioning

confidence: 87%

Ecological effects on metabolic scaling: amphipod responses to fish predators in freshwater springs

Glazier

Butler

Lombardi

et al. 2011

Ecological Monographs

169

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Metabolic rate is commonly thought to scale with body mass to the 3/4 power as a result of universal body design constraints. However, recent comparative work has shown that the metabolic‐scaling slope may vary significantly among species and higher taxa, apparently in response to different lifestyles and ecological conditions, though the precise mechanisms involved are not well understood. To better understand these underappreciated ecological effects and their causes, it is important to control for extraneous phylogenetic and environmental influences. We demonstrate how this may be done by comparing the ontogenetic scaling of resting metabolic rate among populations of the same species (the amphipod Gammarus minus) in mid‐Appalachian freshwater springs with similar, relatively constant environmental conditions, except for the varying presence of the predatory fish Cottus cognatus. We found that populations of G. minus exhibit significantly lower metabolic‐scaling slopes (0.54–0.62) in three freshwater springs with C. cognatus than in two springs without these fish (0.76–0.77). We tested multiple hypothetical causes for these population differences. Our results best supported the hypothesis that metabolic scaling was influenced by the effects of size‐selective predation on the ontogeny of growth, a metabolically expensive process. The body size scaling of growth is significantly less steep in the populations inhabiting springs with vs. without fish, thus paralleling the interpopulation differences in metabolic scaling. Prematurational growth of G. minus is as high or higher in the fish springs, whereas postmaturational growth is significantly lower, often approaching zero. Similarly, the amphipods in the fish springs tend to have higher metabolic rates at small sizes, but lower metabolic rates at large sizes, compared to those in the fishless springs. Our results do not support other hypothetical causes of the interpopulation variation in metabolic scaling, including differential scaling of cell size or low‐metabolism body components (fat and mineralized exoskeleton), or possible effects of other environmental factors associated with the presence of fish. However, fish‐induced population differences in adult behavioral activity may influence metabolic scaling in G. minus, a possibility under current study. We conclude that ecological factors may significantly influence metabolic scaling, contrary to common belief.

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Section: Discussionmentioning

confidence: 87%

Ecological effects on metabolic scaling: amphipod responses to fish predators in freshwater springs

Glazier

Butler

Lombardi

et al. 2011

Ecological Monographs

169

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“…The abundance of G. lacustris correlates negatively with that of fish but positively with the occurrence of submerged aquatic vegetation (Anteau et al. ). Bullhead fish prey on benthic amphipods in Lake Baikal and submerged vegetation is absent around Bolshie Koty.…”

Section: Discussionmentioning

confidence: 99%

Lake Baikal amphipods under climate change: thermal constraints and ecological consequences

et al. 2016

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Abstract. Lake Baikal, the world's most voluminous freshwater lake, has experienced unprecedented warming during the last decades. A uniquely diverse amphipod fauna inhabits the littoral zone and can serve as a model system to identify the role of thermal tolerance under climate change. This study aimed to identify sublethal thermal constraints in two of the most abundant endemic Baikal amphipods, Eulimnogammarus verrucosus and Eulimnogammarus cyaneus, and Gammarus lacustris, a ubiquitous gammarid of the Holarctic. As the latter is only found in some shallow isolated bays of the lake, we further addressed the question whether rising temperatures could promote the widespread invasion of this non-endemic species into the littoral zone. Animals were exposed to gradual temperature increases (4 week, 0.8 °C/d; 24 h, 1 °C/h) starting from the reported annual mean temperature of the Baikal littoral (6 °C). Within the framework of oxygen-and capacity-limited thermal tolerance (OCLTT), we used a nonlinear regression approach to determine the points at which the changing temperature-dependence of relevant physiological processes indicates the onset of limitation. Limitations in ventilation representing the first limits of thermal tolerance (pejus (= "getting worse") temperatures (T p )) were recorded at 10.6 (95% confidence interval; 9.5, 11.7), 19.1 (17.9, 20.2), and 21.1 (19.8, 22.4) °C in E. verrucosus, E. cyaneus, and G. lacustris, respectively. Field observations revealed that E. verrucosus retreated from the upper littoral to deeper and cooler waters once its T p was surpassed, identifying T p as the ecological thermal boundary. Constraints in oxygen consumption at higher than critical temperatures (T c ) led to an exponential increase in mortality in all species. Exposure to short-term warming resulted in higher threshold values, consistent with a time dependence of thermal tolerance. In conclusion, species-specific limits to oxygen supply capacity are likely key in the onset of constraining (beyond pejus) and then life-threatening (beyond critical) conditions. Ecological consequences of these limits are mediated through behavioral plasticity in E. verrucosus. However, similar upper thermal limits in E. cyaneus (endemic, Baikal) and G. lacustris (ubiquitous, Holarctic) indicate that the potential invader G. lacustris would not necessarily benefit from rising temperatures. Secondary effects of increasing temperatures remain to be investigated.

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“…Aquatic invertebrates were sampled with two types of gear along five randomly selected transects in each lake. Macroinvertebrates were sampled with sweep nets (500 lm mesh) at 0.75 m depth on each transect, with nets submerged to the sediments then drawn to the water surface at a 45°angle (Anteau et al, 2011). Any plant and detrital material collected was vigorously shaken, rinsed and inspected before being discarded.…”

Section: Field Methodsmentioning

confidence: 99%

Is the island biogeography model a poor predictor of biodiversity patterns in shallow lakes?

et al. 2015

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1. The classic island biogeography model (IBM) predicts highest species richness in large, connected habitats due to colonisation and reduced risk of extinction. Promoting large, connected habitats has subsequently become a common theme in conservation biology. 2. However, the IBM does not account for direct and indirect interactions among species. For example, planktivorous and benthivorous fish may reduce biodiversity in shallow lakes by inducing shifts to a turbid-water lake state with low habitat complexity. 3. We assessed relationships between species richness, landscape features, fish biomass and lake state in 104 shallow lakes in Minnesota, U.S.A. First, we tested whether lake size and connectivity influenced species richness of fish and biomass of planktivores and benthivores (fish biomass). We subsequently tested whether fish biomass affected the probability that lakes were in turbid versus clear-water states. Finally, we tested whether species richness of macrophytes and taxon richness of aquatic invertebrates showed stronger relationships with lake size and connectivity or with fish biomass and lake state. 4. Fish richness and biomass both increased with lake size and were higher in connected basins. Fish biomass, in turn, increased the probability that lakes would be turbid. In contrast, macrophyte and invertebrate richness were unrelated to lake size or connectivity. Instead, macrophyte richness was best predicted by lake state, while invertebrate richness was predicted by lake state and fish biomass. Richness of both macrophytes and invertebrates was higher in clear lakes, and invertebrate richness was inversely related to fish biomass. 5. Our results indicate the IBM poorly explains the diversity of macrophytes and invertebrates in shallow lakes, with diversity more strongly driven by biotic interactions and influences associated with fish. We suggest that ecological implications of increased connectivity and lake size should be considered in future conservation strategies for shallow lakes.

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Fish and land use influence Gammarus lacustris and Hyalella azteca (Amphipoda) densities in large wetlands across the upper Midwest

Cited by 38 publications

References 38 publications

Ecological effects on metabolic scaling: amphipod responses to fish predators in freshwater springs

Ecological effects on metabolic scaling: amphipod responses to fish predators in freshwater springs

Lake Baikal amphipods under climate change: thermal constraints and ecological consequences

Is the island biogeography model a poor predictor of biodiversity patterns in shallow lakes?

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