Response of nutrient limitation to invasive fish suppression: How carcasses and analog pellets alter periphyton

Tronstad, Lusha M.; Lujan, Dominique R.; Briggs, Michelle A.; Albertson, Lindsey K.; Glassic, Hayley C.; Guy, Christopher S.; Koel, Todd M.

doi:10.1086/718647

Cited by 6 publications

(12 citation statements)

References 54 publications

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“…Treatment of spawning reefs with organic material may unintentionally increase primary production through nutrient addition or may reduce abundances of nontarget benthic MANAGEMENT BRIEF macroinvertebrates through DO limitation. Nitrogen and phosphorus co-limited periphyton before the spawning reef treatments but not after (Lujan et al 2022). However, the ingredients in the pellets (vitamin E, phytoestrogen, and soybean oil) reduced the growth of primary producers, possibly offsetting the increased growth caused by nutrients (Lujan et al 2022).…”

Section: Discussionmentioning

confidence: 98%

“…Nitrogen and phosphorus co‐limited periphyton before the spawning reef treatments but not after (Lujan et al. 2022). However, the ingredients in the pellets (vitamin E, phytoestrogen, and soybean oil) reduced the growth of primary producers, possibly offsetting the increased growth caused by nutrients (Lujan et al.…”

Section: Discussionmentioning

confidence: 99%

“…However, the ingredients in the pellets (vitamin E, phytoestrogen, and soybean oil) reduced the growth of primary producers, possibly offsetting the increased growth caused by nutrients (Lujan et al. 2022). The probability of mortality of limnephilid caddisflies was more than three times higher in organic (carcass) treated spawning reefs than in control reefs, whereas mortality of the amphipods Gammarus lacustris and Hyalella azteca did not differ (Briggs et al.…”

Section: Discussionmentioning

confidence: 99%

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Aerial Application of Organic Pellets Eliminates Lake Trout Recruitment from a Primary Spawning Reef in Yellowstone Lake

Koel

Doepke

MacDonald

et al. 2023

N American J Fish Manag

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Invasive Lake Trout Salvelinus namaycush in the Yellowstone Lake ecosystem have been gillnetted since 1995 to suppress the population and allow for recovery of native Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri. Although gillnetting is effective (Lake Trout population growth rate λ ≤ 0.6 during 2012-2022), the effort only targets free-swimming, age-2 and older Lake Trout. We developed a complementary suppression method using organic (soy and wheat) pellets to cause Lake Trout embryo mortality and reduce recruitment from spawning areas. The entire Carrington Island spawning reef (0.5 ha) was aerially treated with 3.56 and 3.00 kg/m 2 of pellets in 2019 and 2020, respectively. Pellet decomposition caused dissolved oxygen concentrations to decline to lethal levels at 20 cm depth in the substrate, and pellets mostly dissipated from the reef within 12 d. Lake Trout fry trap CPUE was reduced to zero

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Aerial Application of Organic Pellets Eliminates Lake Trout Recruitment from a Primary Spawning Reef in Yellowstone Lake

Koel

Doepke

MacDonald

et al. 2023

N American J Fish Manag

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“…How to cite this article: Briggs, M.A., Albertson, L.K., Lujan, D.R., Tronstad, L.M., Glassic, H.C., Guy, C.S. et al (2022) Fish carcass deposition to suppress invasive lake trout through hypoxia causes limited, non-target effects on benthic invertebrates in Yellowstone Lake.…”

Section: Conflict Of Interestmentioning

confidence: 99%

“…Carcass addition alters water chemistry and increases otherwise limiting nutrients (Lujan et al., 2022; Theriot et al., 1997); however, it is unknown how this action affects organisms such as benthic invertebrates in the littoral zone of a lake. In lotic ecosystems, fish carcass additions are commonly used to stimulate stream productivity in response to reduced runs of anadromous fish.…”

Section: Introductionmentioning

confidence: 99%

Fish carcass deposition to suppress invasive lake trout through hypoxia causes limited, non‐target effects on benthic invertebrates in Yellowstone Lake

Briggs

Albertson

Lujan

et al. 2022

Aquaculture Fish & Fisheries

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Invasive species can have negative effects on native biodiversity and ecosystem function, and suppression is often required to minimize the effects. However, management actions to suppress invasive species may cause negative, unintended effects on non‐target taxa. Across the United States, lake trout (Salvelinus namaycush) are invasive in many freshwater ecosystems, reducing native fish abundance and diversity through predation and competition. In an integrated pest management approach, lake trout embryos in Yellowstone Lake, Wyoming, are suppressed by depositing lake trout carcasses onto spawning sites; the carcasses reduce dissolved oxygen concentrations as they decay, causing embryo mortality. We conducted a field experiment during one ice‐free season at four sites in Yellowstone Lake to investigate the non‐target effects of carcass treatment on benthic invertebrates, which could have consequences for native fish diets. While overall invertebrate density and biomass did not respond to carcass treatment, Chironomidae midges and Sphaeriidae fingernail clams decreased in abundance. Carcass treatment altered invertebrate community structure based on density, but not biomass. Carcass treatment to suppress invasive fish embryos has spatially localized, non‐target effects on some benthic invertebrate taxa. Given the small spatial extent of carcass treatment within the lake, we conclude it is unlikely that carcass treatment will alter food availability for native fishes.

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Yellowstone Cutthroat Trout Recovery in Yellowstone Lake: Complex Interactions Among Invasive Species Suppression, Disease, and Climate Change

Glassic,

Chagaris,

Guy

et al. 2023

Fisheries

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In Yellowstone Lake, Wyoming, the largest inland population of nonhybridized Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri, hereafter Cutthroat Trout, declined throughout the 2000s because of predation from invasive Lake Trout Salvelinus namaycush, drought, and whirling disease Myxobolus cerebralis. To maintain ecosystem function and conserve Cutthroat Trout, a Lake Trout gill netting suppression program was established in 1995, decreasing Lake Trout abundance and biomass. Yet, the response of Cutthroat Trout to varying Lake Trout suppression levels, collectively with the influence of disease and climate, is unknown. We developed an ecosystem model (calibrated to historical data) to forecast (2020–2050) whether Cutthroat Trout would achieve recovery benchmarks given disease, varying suppression effort, and climate change. Lake Trout suppression influenced Cutthroat Trout recovery; current suppression effort levels resulted in Cutthroat Trout recovering from historical lows in the early 2000s. However, Cutthroat Trout did not achieve conservation benchmarks when incorporating the influence of disease and climate. Therefore, the National Park Service intends to incorporate age‐specific abundance, spawner biomass, or both in conservation benchmarks to provide better indication of how management actions and environmental conditions influence Cutthroat Trout. Our results illustrate how complex interactions within an ecosystem must be simultaneously considered to establish and achieve realistic benchmarks for species of conservation concern.

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Response of nutrient limitation to invasive fish suppression: How carcasses and analog pellets alter periphyton

Cited by 6 publications

References 54 publications

Aerial Application of Organic Pellets Eliminates Lake Trout Recruitment from a Primary Spawning Reef in Yellowstone Lake

Aerial Application of Organic Pellets Eliminates Lake Trout Recruitment from a Primary Spawning Reef in Yellowstone Lake

Fish carcass deposition to suppress invasive lake trout through hypoxia causes limited, non‐target effects on benthic invertebrates in Yellowstone Lake

Yellowstone Cutthroat Trout Recovery in Yellowstone Lake: Complex Interactions Among Invasive Species Suppression, Disease, and Climate Change

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