Evidence of host switching: Sea lampreys disproportionately attack Chinook salmon when lake trout abundance is low in Lake Ontario
Jean V. Adams, Michael L. Jones
2021, Journal of Great Lakes Research (47) S604-S611
Lake trout (Salvelinus namaycush) is the presumed preferred host of the invasive sea lamprey (Petromyzon marinus) in the Great Lakes, but little is understood about this preference outside of laboratory experiments. By preference we mean sea lamprey attacks on hosts are disproportionate to host relative abundance. The purpose of this...
Environmental gradients of selection for an alpine-obligate bird, the white-tailed ptarmigan (Lagopus leucura)
Shawna J Zimmerman, Cameron L. Aldridge, Kathryn M. Langin, Gregory T Wann, Robert S. Cornman, Sara J. Oyler-McCance
2021, Heredity (126) 117-131
The warming climate will expose alpine species adapted to a highly seasonal, harsh environment to novel environmental conditions. A species can shift their distribution, acclimate, or adapt in response to a new climate. Alpine species have little suitable habitat to shift their distribution, and the limits of acclimation will likely...
Architecture of remnant trees influences native woody plant recruitment in abandoned Hawaiian pastures
Evan M Rehm, Stephanie G. Yelenik, Marley Puanani Smith, Carla M. D’Antonio
2021, Plant Ecology (222) 659-667
Abandoned tropical pastures offer opportunities for passive and active restoration of native forest communities. Tree architecture of remnant canopy trees may be one important factor that can facilitate native plant recruitment in abandoned pastures but has largely been overlooked. Here, we evaluated patterns of native woody plant recruitment under remnant...
Assessing the assumptions of classification agreement, accuracy, and predictable healing time of sea lamprey wounds on lake trout
Tyler Firkus, Cheryl Murphy, Jean V. Adams, Ted Treska, Gregory J. Fischer
2021, Journal of Great Lakes Research (47) S368-S377
Sea lamprey control in the Laurentian Great Lakes relies on records of sea lamprey wounds on lake trout to assess whether control efforts are supporting fisheries management targets. Wounding records have been maintained for 70 years under the assumption that they are a reliable and accurate reflection of sea lamprey damage...
Elemental and radionuclide exposures and uptakes by small rodents, invertebrates, and vegetation at active and post-production uranium mines in the Grand Canyon watershed
Danielle M. Cleveland, Jo Ellen Hinck, Julia S. Lankton
2021, Chemosphere (263)
The effects of breccia pipe uranium mining in the Grand Canyon watershed (Arizona) on ecological and cultural resources are largely unknown. We characterized the exposure of biota to uranium and co-occurring ore body elements during active ore production and at a site where ore production had recently concluded. Our results...
Movement of synthetic organic compounds in the food web after the introduction of invasive quagga mussels (Dreissena bugensis) in Lake Mead, Nevada and Arizona, USA
Steven L. Goodbred, Michael R. Rosen, Reynaldo Patino, David A. Alvarez, Kathy R. Echols, Kerensa King, John Umek
2021, Science of the Total Environment (752)
Introductions of dreissenid mussels in North America have been a significant concern over the last few decades. This study assessed the distribution of synthetic organic compounds (SOCs) in the food web of Lake Mead, Nevada/Arizona, USA and how this distribution was influenced by the...
Integrating the evidence for a terrestrial carbon sink caused by increasing atmospheric CO2
Anthony P. Walker, Martin G De Kauwe, Ana Bastos, Soumaya Belmecheri, Katerina Georgiou, Ralph F. Keeling, Sean M. McMahon, Belinda E. Medlyn, David J P Moore, Richard J. Norby, Sonke Zaehle, Kristina J. Anderson-Teixeira, Giovanna Battipaglia, Roel J W Brienen, Kristine G Cabugao, Maxime Cailleret, Elliott Campbell, Josep G Canadell, Philippe Ciais, Matthew E Craig, David S Ellsworth, Graham D Farquhar, Simone Fatichi, Joshua B. Fisher, David C Frank, Heather Graven, Lianhong Gu, Vanessa Haverd, Kelly A Heilman, Martin Heimann, Bruce A Hungate, Colleen M. Iverson, Fortunat Joos, Mingkai Jiang, Trevor F. Keenan, Jurgen Knauer, Christian Korner, Victor O Leshyk, Sebastian Leuzinger, Yao Liu, Natasha MacBean, Yadvinder Malhi, Tim R McVicar, Josep Penuelas, Julia Pongratz, A Shafer Powell, Terhi Riutta, Manon E B Sabot, Juergen Schleucher, Stephen Sitch, William K. Smith, Benjamin N. Sulman, Benton Taylor, Cesar Terrer, Margaret S. Torn, Kathleen K Treseder, Anna T Trugman, Susan E. Trumbore, Phillip J. van Mantgem, Steve L Voelker, Mary E Whelan, Peiter A Zuidema.
2021, New Phytologist (229) 2413-2445
Atmospheric carbon dioxide concentration ([CO2]) is increasing, which increases leaf‐scale photosynthesis and intrinsic water‐use efficiency. These direct responses have the potential to increase plant growth, vegetation biomass, and soil organic matter; transferring carbon from the atmosphere into terrestrial ecosystems (a carbon sink). A substantial global terrestrial carbon sink would slow...
Processes influencing marsh elevation change in low- and high-elevation zones of a temperate salt marsh
Linda K. Blum, Robert R. Christian, Donald Cahoon, Patricia L. Wiberg
2021, Estuaries and Coasts (44) 818-833
The movement of salt marshes into uplands and marsh submergence as sea level rises is well documented; however, predicting how coastal marshes will respond to rising sea levels is constrained by a lack of process-based understanding of how various marsh zones adjust to changes in sea level. To assess the...
Disentangling the effects of multiple fires on spatially interspersed sagebrush (Artemisia spp.) communities
Douglas J. Shinneman, Susan McIlroy, Marie-Anne de Graaff
2021, Journal of Vegetation Science (32)
QuestionsRelative to a landscape with a mosaic of two sagebrush community types and increasing fire frequency, we asked: (a) do vegetation characteristics vary significantly with number of times burned for each sagebrush community; (b) how do vegetation responses to different fire frequencies compare between the two sagebrush...
Larval Coregonus spp. diets and zooplankton community patterns in the Apostle Islands, Lake Superior
Verena S. Lucke, Taylor R. Stewart, Mark Vinson, Jay D. Glase, Jason D. Stockwell
2021, Journal of Great Lakes Research (46) 1391-1401
With the exception of lake whitefish (Coregonus clupeaformis), relatively little is known about the early life history of larval coregonines in the Laurentian Great Lakes. For example, our knowledge of the feeding ecology of larval coregonines (excluding lake whitefish) is based on only 900 stomachs reported in the literature. Here,...
Nitrogen enrichment reduces nitrogen and phosphorus resorption through changes to species resorption and plant community composition
Xiao-Tao Lu, Shuang-Li Hou, Sasha C. Reed, Jiang-Xia Yin, Yan-Yu Hu, Hai-Wei Wei, Zhi-Wei Zhang, Guo-Jiao Yang, Zhuo-Yi Liu, Xing-Guo Han
2021, Ecosystems (24) 602-612
Anthropogenic nitrogen (N) deposition has affected plant community composition and nutrient cycling in terrestrial ecosystems worldwide. This includes changes to the way plants use and recycle nutrients, including effects on nutrient resorption, which is a key process through which plants recover nutrients from tissue during senescence. Nutrient resorption has considerable...
Mortality predispositions of conifers across western USA
Wenzhi Wang, Nathan B. English, Charlotte Grossiord, Arthur Gessler, Adrian Das, Nathan L. Stephenson, Christopher H. Baisan, Craig D. Allen, Nate G. McDowell
2021, New Phytologist (229) 831-844
Conifer mortality rates are increasing in western North America, but the physiological mechanisms underlying this trend are not well understood.We examined tree‐ring‐based radial growth along with stable carbon (C) and oxygen (O) isotope composition (δ13C and δ18O, respectively) of dying and surviving conifers at eight old‐growth forest sites across a...
Forest density intensifies the importance of snowpack to growth in water-limited pine forests
Kelly Erika Gleason, John B. Bradford, Anthony W. D’Amato, Shawn Fraver, Brian J. Palik, Michael A. Battaglia
2021, Ecological Applications (31)
Warming climate and resulting declines in seasonal snowpack have been associated with drought stress and tree mortality in seasonally snow‐covered watersheds worldwide. Meanwhile, increasing forest density has further exacerbated drought stress due to intensified tree‐tree competition. Using a uniquely detailed dataset of population‐level forest growth (n=2495 sampled trees), we examined...
Identifying sources and year classes contributing to invasive grass carp in the Laurentian Great Lakes
Gregory W. Whitledge, Duane Chapman, John Farver, Seth Herbst, Nicholas E. Mandrak, Jeffrey G. Miner, Kevin L. Pangle, Patrick Kocovsky
2021, Journal of Great Lakes Research (47) 14-28
Relative contributions of aquaculture-origin and naturally-reproduced grass carp (Ctenopharyngodon idella) in the Laurentian Great Lakes have been unknown. We assessed occurrence and distribution of aquaculture-origin and wild grass carp in the Great Lakes using ploidy and otolith stable oxygen isotope (δ18O) data. We inferred natal river and dispersal from natal...
Lake trout growth is sensitive to spring temperature in southwest Alaska lakes
Vanessa R. von Biela, Bryan A. Black, Daniel B. Young, Peter van der Sleen, Krista K. Bartz, Christian E. Zimmerman
2021, Ecology of Freshwater Fish (30) 88-99
In high‐latitude lakes, air temperature is an important driver of ice cover thickness and duration, which in turn influence water temperature and primary production supporting lake consumers and predators. In lieu of multidecadal observational records necessary to assess the response of lakes to long‐term warming, we used otolith‐based growth records...
Amazon sediment transport and accumulation along the continuum of mixed fluvial and marine processes
Charles A. Nittrouer, David J. DeMaster, Steven A. Kuehl, Alberto G. Figueiredo, Richard W. Sternberg, L. Ercilio C. Faria, Odete M. Silveira, Meade A. Allison, Gail C. Kineke, Andrea S. Ogston, Pedro W.M. Souza Filho, Nils E. Asp, Daniel J. Nowacki, Aaron T. Fricke
2021, Annual Review of Marine Science (13) 501-536
Sediment transfer from land to ocean begins in coastal settings and, for large rivers such as the Amazon, has dramatic impacts over thousands of kilometers covering diverse environmental conditions. In the relatively natural Amazon tidal river, combinations of fluvial and marine processes transition toward the ocean, affecting the transport and...
Validation of the model-predicted spawning area of grass carp Ctenopharyngodon idella in the Sandusky River
Patrick Kocovsky, Nicole R. King, Eric Weimer, Christine Mayer, Song S. Qian
2021, Journal of Great Lakes Research (47) 29-36
Spawning of grass carp, Ctenopharyngodon idella, in the Great Lakes basin was verified when eight fertilized eggs were collected in the Sandusky River, a tributary to Lake Erie, in 2015. Using a fluvial drift model (FluEgg) and simulation modeling, researchers predicted the fertilization...
Fishing preferences, angling behavior, and attitudes toward management: A comparison between White and Nonwhite anglers
H. J. Roop, N. C. Poudyal, Cecil A. Jennings
2021, Human Dimensions of Wildlife (26) 84-89
No abstract available....
Where you trap matters: Implications for integrated sea lamprey management
Scott M. Miehls, Heather Dawson, Alex Maguffee, Nicholas S. Johnson, Michael Jones, Norine Dobiesz
2021, Journal of Great Lakes Research (47) S320-S327
Barriers and pesticides have been used in streams to control sea lamprey in the Laurentian Great Lakes for nearly 70 years. Considerable effort has been spent to develop additional control measures, but much less effort has gone toward identifying how or where additional control measures might be cost-effectively integrated into the...
Effects of plunge pool configuration on downstream passage survival of juvenile blueback herring
Theodore R. Castro-Santos, Kevin Mulligan, Micah Kieffer, Alexander Haro
2021, Aquaculture and Fisheries (6) 135-143
Anadromous alosines are widespread throughout the Northern Hemisphere. Juveniles of this clade are notoriously fragile animals that are at high risk of injury and death associated with passage at hydroelectric facilities. Although turbine mortality is a common concern, conditions encountered when...
Trapping of suspended sediment by submerged aquatic vegetation in a tidal freshwater region: Field observations and long-term trends
Paul A. Work, Maureen A. Downing-Kunz, Judith Z. Drexler
2021, Estuaries and Coasts (44) 734-739
Widespread invasion by non-native, submerged aquatic vegetation (SAV) may modify the sediment budget of an estuary, reducing the availability of inorganic sediment required by marshes to maintain their position in the tidal frame. The instantaneous trapping rate of suspended sediment in SAV patches in an estuary has not previously been...
A synthesis of the biology and ecology of sculpin species in the Laurentian Great Lakes and implications for the adaptive capacity of the benthic ecosystem
Kelly F. Robinson, Charles R. Bronte, David Bunnell, Peter T. Euclide, Darryl W. Hondorp, John J. Janssen, Matthew S. Kornis, Derek H. Ogle, Will Otte, Stephen Riley, Mark Vinson, Shea L. Volkel, Brian Weidel
2021, Reviews in Fisheries Science and Aquaculture (29) 96-121
The Laurentian Great Lakes have experienced recent ecosystem changes that could lead to reductions in adaptive capacity and ultimately a loss of biodiversity and production throughout the food web. Observed changes in Great Lakes benthic communities include declines of native species and widespread success of invasive...
Group density, disease, and season shape territory size and overlap of social carnivores
E. E. Brandell, Nicholas M. Fountain-Jones, Marie L. J. Gilbertson, Paul C. Cross, P. J. Hudson, Douglas W. Smith, Daniel R. Stahler, Craig Packer, Meggan E. Craft
2021, Journal of Animal Ecology (90) 87-101
1. The spatial organization of a population can influence the spread of information, behaviour, and pathogens. Territory size and territory overlap, components of spatial organization, provide key information as these metrics may be indicators of habitat quality, resource dispersion, contact rates, and environmental risk (e.g., indirectly transmitted pathogens). Furthermore, sociality...
Food web fuel differs across habitats and seasons of a tidal freshwater estuary
Matthew J. Young, Emily R. Howe, Teejay O’Rear, Kathleen Berridge, Peter B. Moyle
2021, Estuaries and Coasts (44) 286-301
Estuarine food webs are fueled by multiple different primary producers. However, identifying the relative importance of each producer to consumers is difficult, particularly for fishes that utilize multiple food sources due to both their mobility and their generally high trophic levels. Previous studies have documented broad spatial differences in the...
Estimating inundation of small waterbodies with sub-pixel analysis of Landsat imagery: Long-term trends in surface water area and evaluation of common drought indices
Ibrahima Sall, Christopher J. Jarchow, Brent H. Sigafus, Lisa A Eby, Michael James Forzley, Blake R. Hossack
2021, Remote Sensing in Ecology and Conservation (7) 109-124
Small waterbodies are numerically dominant in many landscapes and provide several important ecosystem services, but automated measurement of waterbodies smaller than a standard Landsat pixel (0.09 ha) remains challenging. To further evaluate sub‐Landsat pixel techniques for estimating inundation extent of small waterbodies (basin area: 0.06–1.79 ha), we used a partial spectral unmixing...
