Predatory fish invasion induces within and across ecosystem effects in Yellowstone National Park

Koel, Todd M.; Tronstad, Lusha M.; Arnold, Jeffrey L.; Gunther, Kerry A.; Smith, Douglas W.; Syslo, John M.; White, P. J.

doi:10.1126/sciadv.aav1139

Cited by 60 publications

(103 citation statements)

References 63 publications

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“…Yellowstone Cutthroat Trout are an important ecological resource within the Yellowstone Lake ecosystem due to their role as prey for terrestrial species, such as grizzly bears Ursus arctos horribilis , ospreys Pandion haliaetus , and others (Koel et al. , 2019b).…”

Section: Methodsmentioning

confidence: 99%

“…The introduction and establishment of invasive Lake Trout have resulted in the decline of native Yellowstone Cutthroat Trout abundance over the last three decades (Koel et al 2019a). Yellowstone Cutthroat Trout are an important ecological resource within the Yellowstone Lake ecosystem due to their role as prey for terrestrial species, such as grizzly bears Ursus arctos horribilis, ospreys Pandion haliaetus, and others (Koel et al 2005(Koel et al , 2019b.…”

Section: Methodsmentioning

confidence: 99%

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Targeting Aggregations of Telemetered Lake Trout to Increase Gillnetting Suppression Efficacy

Williams

Guy

Koel

et al. 2020

N American J Fish Manag

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Conserving Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri by suppressing invasive Lake Trout Salvelinus namaycush in Yellowstone Lake is a high priority for Yellowstone National Park resource managers. Here, we tested whether targeting telemetered Lake Trout could increase the efficacy of Lake Trout suppression by gill netting. Mobile acoustic tracking surveys were performed to identify aggregations of tagged Lake Trout in summer (June–August) 2017. Lake Trout aggregations were relayed daily to suppression crews by phone, radio, or text and a printed map. Suppression crews set 30 large‐mesh gill nets targeting telemetered Lake Trout aggregations (target treatment) and 124 large‐mesh gill nets not targeting telemetered aggregations (nontarget treatment). Mean loge(CPUE) was higher for the target treatment (0.37; 95% credible interval [CRI] = 0.08–0.65) than for the nontarget treatment (−0.37; 95% CRI = −0.51 to −0.21). Mean of the target treatment was higher than the mean of the nontarget treatment for over 99% of the 1,000 draws from the joint posterior distribution. Because of telemetry costs, mean CPUE per US$10,000 spent was similar between the target treatment (0.20; 95% CRI = 0.15–0.26) and the nontarget treatment (0.15; 95% CRI = 0.13–0.17). Telemetry is an effective strategy for improving Lake Trout CPUE, which corresponds to an increased efficiency in the Lake Trout suppression program.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Targeting Aggregations of Telemetered Lake Trout to Increase Gillnetting Suppression Efficacy

Williams

Guy

Koel

et al. 2020

N American J Fish Manag

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“…This study aids to expand our knowledge about how the organisms respond to 212 environmental variation, specifically to salinity, and which is the role of the historical 213 context in shaping phenotypic responses to ecological conditions. In particular, we 214 showed that organisms from different geographic locations responded deferentially to This represents a topic of increasing interest [42][43][44][45].…”

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confidence: 90%

Geographical origin determines responses to salinity of Mediterranean caddisflies

Carter

Flores

Ramos‐Jiliberto

2019

Preprint

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RR-J) MC-M and RR-J conceived the experiments, MF and MC-M conducted the experiments, MC-M and RR-J analyzed the results. MC-M and RR-J wrote the manuscript. All authors reviewed and approved the manuscript. AbstractMany freshwater ecosystems worldwide, and particularly Mediterranean ones, show increasing levels of salinity. This changes in water conditions could affect abundance and distribution of inhabiting species as well as the provision of ecosystem services. In this study we conduct laboratory experiments using the macroinvertebrate Smicridea annulicornis as a model organism. Our factorial experiments were designed to evaluate the effects of geographical origin on organisms and salinity levels on survival and behavioral responses of caddisflies. The experimental organisms were captured from rivers belonging to three hydrological basins along a 450 Km latitudinal gradient in the Mediterranean region of Chile. Animals were exposed to three conductivity levels, from 180 to 1400 µS/cm, close to the historical averages of the source rivers. We measured the behavioral responses to experimental stimulii and the survival time. Our results showed that geography origin shaped the behavioral and survival responses to salinity. In particular, survival and activity decreased more strongly with increasing salinity in organisms coming from more dilute waters. This suggests local adaptation to be determinant for salinity responses in this species of benthic invertebrate. In the current scenario of fast temporal and spatial changes in water levels and salt concentration, the conservation of geographic intra-specific variation of aquatic species is crucial for lowering the risk of salinity-driven biodiversity loss. 60 freshwater organisms are negatively affected by increased salinity [28,29]. According to 61 this hypothesis, we would expect that low-salinity adapted organisms will be more 62 July 11, 2019 2/10 130 exhibition of any given behavior, here referred as "activity" was analyzed using a model 131 which included body size, the time at measurement as well as the kind of behavioral 132 trait adopted in each activity event recorded at each experimental condition. Because 133 the behaviors were recorded as the presence or absence of the responses in discrete time 134 (count data), our variable responses swimming, sheltering, pushing-up and walking were 135 biased. Thus, to analyze the behavioral response variables, we fit Generalized Linear 136 Models (GLMs) with error family according to this characteristic (quasibinomial). Body 137 size and measurement times were used as covariates into the models to avoid under-sub 138 estimating the behavioral responses to the combination of stress conditions. All the 139 analyses were performed using R software [34].

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“…For instance, Fisher & Likens (1973) estimated that small streams obtain 75% of their total energy budget from terrestrial sources. Those cross-ecosystem subsidies can support complex communities (Polis & Hurd 1995), and sometimes lead to indirect bottom-up effects across ecosystems via spatial trophic dynamics (Knight et al 2005;Bultman et al 2014;Koel et al 2019). Cross-ecosystem subsidy studies generally focus on resource exchange at a specific ecosystem boundary .…”

Section: Introductionmentioning

confidence: 99%

Metaecosystem dynamics drive community composition in experimental multilayered spatial networks

Harvey

Gounand

Fronhofer

et al. 2019

Preprint

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Cross-ecosystem subsidies are studied with a focus on resource exchange at local ecosystem boundaries. This perspective ignores regional dynamics that can emerge via constraints imposed by the landscape, potentially leading to spatially-dependent effects of subsidies and spatial feedbacks. Using miniaturized landscape analogues of river dendritic and terrestrial lattice spatial networks, we manipulated and studied resource exchange between the two whole networks. We found that community composition in dendritic networks depended on the resource pulse from the lattice network, with the strength of this effect declining in larger downstream patches. In turn, this spatially-dependent effect imposed constraints on the lattice network with populations in that network reaching higher densities when connected to more central patches in the dendritic network. Consequently, localized cross-ecosystem fluxes, and their respective effects on recipient ecosystems, must be studied in a perspective taking into account the explicit spatial configuration of the landscape.Statement of authorshipEH, IG, EAF and FA designed the research; EH conducted the lab experiment with support from IG, EAF and FA, processed the experimental data with methodological developments from IG, and carried out the analysis of experimental data; all authors participated in results interpretation; EH wrote the first draft of the manuscript; All authors significantly contributed to further manuscript revisions.

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Predatory fish invasion induces within and across ecosystem effects in Yellowstone National Park

Cited by 60 publications

References 63 publications

Targeting Aggregations of Telemetered Lake Trout to Increase Gillnetting Suppression Efficacy

Targeting Aggregations of Telemetered Lake Trout to Increase Gillnetting Suppression Efficacy

Geographical origin determines responses to salinity of Mediterranean caddisflies

Metaecosystem dynamics drive community composition in experimental multilayered spatial networks

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