Article
Environmental Sciences
Jason B. Fellman, Eran Hood, David D'Amore, Richard T. Edwards
Summary: The study found that the export of nitrogen and phosphorus from the perhumid coastal temperate rainforest of northwestern North America is influenced by seasonal and stormflow events, showing a pulsed nature in the magnitude and species of nutrients exported.
Article
Geosciences, Multidisciplinary
Maartje C. Korver, Emily Haughton, William C. Floyd, Ian J. W. Giesbrecht
Summary: Hydrometeorological observations of small watersheds in the northeast Pacific coastal temperate rainforest are crucial for understanding ecological connections and informing regional environmental management decisions. This study presents high-resolution streamflow and weather data from seven coastal watersheds, highlighting the variability of rainfall and runoff based on location and elevation.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
Ian J. W. Giesbrecht, Suzanne E. Tank, Gordon W. Frazer, Eran Hood, Santiago G. Gonzalez Arriola, David E. Butman, David D'Amore, David Hutchinson, Allison Bidlack, Ken P. Lertzman
Summary: In this study, a hydro-biogeochemical classification system was developed for watersheds draining to the coastal margin of the Northeast Pacific coastal temperate rainforest. Cluster analysis was used to group watersheds into 12 types based on watershed properties, and the classification was validated using streamflow and dissolved organic carbon measurements from rivers. The results showed that watershed types corresponded with differences in streamflow regime, mean annual runoff, DOC seasonality, and mean DOC concentration.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Geosciences, Multidisciplinary
G. McNicol, E. Hood, D. E. Butman, S. E. Tank, I. J. W. Giesbrecht, W. Floyd, D. D'Amore, J. B. Fellman, A. Cebulski, A. Lally, H. McSorley, S. G. Gonzalez Arriola
Summary: The rivers in the northeast Pacific Coastal Temperate Rainforest export 3.5 Tg-C yr(-1) of dissolved organic carbon (DOC) to the ocean. Over 56% of this DOC flux comes from small coastal watersheds, which make up only 22% of the total drainage basin. The average DOC yield from these coastal watersheds is roughly three times higher than that from tropical regions worldwide. These findings suggest that the export of DOC from these watersheds plays a significant role in regional-scale heterotrophy within near-shore marine ecosystems in the northeast Pacific.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Carsten Spisla, Jan Taucher, Lennart T. Bach, Mathias Haunost, Tim Boxhammer, Andrew L. King, Bettany D. Jenkins, Joselynn R. Wallace, Andrea Ludwig, Jana Meyer, Paul Stange, Fabrizio Minutolo, Kai T. Lohbeck, Alice Nauendorf, Verena Kalter, Silke Lischka, Michael Sswat, Isabel Doerner, Stefanie M. H. Ismar-Rebitz, Nicole Aberle, Jaw C. Yong, Jean-Marie Bouquet, Anna K. Lechtenboerger, Peter Kohnert, Michael Krudewig, Ulf Riebesell
Summary: This study conducted an experiment in Raunefjord, Norway involving the simulation of extreme pCO2 levels in coastal regions, and found that high CO2 conditions significantly impacted the structure of plankton communities, leading to a substantial reorganization of the planktonic food web.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Biodiversity Conservation
Minjie Hu, Yixun Le, Jordi Sardans, Ruibing Yan, Yi Zhong, Dongyao Sun, Chuan Tong, Josep Penuelas
Summary: Accelerated sea-level rise can lead to salinization of freshwater wetlands, but little is known about the effects of salinity on soil phosphorus cycling and microbial genes involved. A field experiment was conducted to investigate the impact of salinity on soil microbial communities and their regulation of phosphorus availability in coastal wetlands. Salinity was found to be positively correlated with phosphorus availability, with different patterns observed between freshwater and brackish wetlands. The microbial communities involved in phosphorus cycling were more diverse and abundant in brackish wetlands, and salinity altered their composition. Metagenomic analysis revealed higher abundance of functional genes related to phosphorus solubilization and mineralization in coastal soils. The findings suggest that moderate increases in salinity can enhance phosphorus availability through the regulation of microbial community and phosphorus cycling.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biology
Allison L. Bidlack, Sarah M. Bisbing, Brian J. Buma, Heida L. Diefenderfer, Jason B. Fellman, William C. Floyd, Ian Giesbrecht, Amritpal Lally, Ken P. Lertzman, Steven S. Perakis, David E. Butman, David D'Amore, Sean W. Fleming, Eran W. Hood, Brian P. Hunt, Peter M. Kiffney, Gavin McNicol, Brian Menounos, Suzanne E. Tank
Summary: Coastal margins are vital areas for material exchange between terrestrial and marine ecosystems. Climate-induced changes in coastal terrestrial ecosystems and hydrologic regimes can impact nearshore ocean chemistry and food web dynamics. Research in these ecosystems can enhance understanding of terrestrial-marine links and climate sensitivities.
Article
Soil Science
Diogo Spinola, Raquel Portes, Jennifer Fedenko, Rebecca Lybrand, Ashlee Dere, Frances Biles, Thomas Trainor, Mark E. Bowden, David D'Amore
Summary: The study demonstrated that lithology plays a significant role in controlling elemental depletion intensities, Fe oxide concentrations, and partly the clay fraction mineralogy in soils. Podzolization was identified as a dominant pedogenic process across all sites.
Article
Environmental Sciences
M. I. Behnke, J. B. Fellman, D. V. D'Amore, R. G. M. Spencer
Summary: This study used advanced technology to investigate the production and transport of dissolved organic matter (DOM) in small watersheds in the northeast Pacific coastal temperate rainforest. The results showed that DOM generation is influenced by vegetation and soil, and can be transported from land to the ocean. Hydrologic and temperature variables were better predictors of DOM inputs from soil sources, while antecedent conditions played a role in the availability of DOM from vegetation sources. The study also found that wetlands contribute nitrogen-containing molecular formulae to DOM and that climate change may affect DOM sources, transport, and fate in these watersheds.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Biodiversity Conservation
E. A. Kreitinger, D. D'Amore, S. M. Bisbing, S. A. Nadeau, J. P. Shapleigh, M. T. Walter
Summary: This study investigates the relationship between soil microbial communities and soil organic carbon persistence. The relative abundances of genes encoding different terminal electron acceptors were compared across an ecohydrologic gradient. The results show that wetland types have a significant impact on genetic variation in soil microbial communities, and plant communities also play a major role.
ECOLOGICAL INDICATORS
(2023)
Article
Fisheries
Frank Amtstaetter, Jian D. L. Yen, Robin Hale, Wayne Koster, Justin O'Connor, Ivor Stuart, Zeb Tonkin
Summary: This study found a positive correlation between river discharge and the abundance of juvenile catadromous and amphidromous fishes, with the day-of-year also significantly impacting catch rates. It suggests that the management of environmental flows should be targeted during low and stable river discharges to promote the immigration of these fishes into freshwater habitats.
JOURNAL OF FISH BIOLOGY
(2021)
Article
Environmental Sciences
Melanie J. Davis, Isa Woo, Christopher S. Ellings, Sayre Hodgson, David A. Beauchamp, Glynnis Nakai, Susan E. W. De La Cruz
Summary: Climate change will have significant impacts on the estuarine habitat mosaic, affecting the growth and survival of fish species, particularly juvenile salmon. The study's bioenergetics model demonstrated that sea-level rise and increasing water temperatures will decrease fish growth rates, potentially resulting in smaller sizes and limited foraging capacity.
ESTUARIES AND COASTS
(2022)
Article
Ecology
Arnaud Lheureux, Nicolas Savoye, Yolanda Del Amo, Eric Goberville, Yann Bozec, Elsa Breton, Pascal Conan, Stephane L'Helguen, Laure Mousseau, Patrick Raimbault, Peggy Rimelin-Maury, Laurent Seuront, Renaud Vuillemin, Jocelyne Caparros, Thierry Cariou, Marie-Ange Cordier, Anne-Marie Corre, Laurence Costes, Olivier Crispi, Muriel Crouvoisier, Hortense de Lary de Latour, Herve Derriennic, Jeremy Devesa, Maia Durozier, Sophie Ferreira, Nicole Garcia, Emilie Grossteffan, Aurore Gueux, Michel Lafont, Veronique Lagadec, Eric Lecuyer, Cedric Leroux, Eric Mace, Eric Maria, Line Mornet, Antoine Nowaczyk, Michel Parra, Franck Petit, Valerie David
Summary: Coastal marine ecosystems are crucial for Earth's biogeochemical and ecological functions, but are highly sensitive to the impacts of climate change and human activities. A study monitoring 12 sampling stations in 8 ecosystems in France over 2 decades found two abrupt changes in 2001 and 2005, indicating the influence of climate change on coastal ecosystems with trends towards increasing temperature and salinity, and decreasing chlorophyll a, nutrients, and particulate matter.
MARINE ECOLOGY PROGRESS SERIES
(2021)
Article
Multidisciplinary Sciences
Jessica Garzke, Ian Forster, Sean C. Godwin, Brett T. Johnson, Martin Krkosek, Natalie Mahara, Evgeny A. Pakhomov, Luke A. Rogers, Brian P. Hunt
Summary: This study examined the body and nutritional condition of juvenile sockeye salmon migrating through oceanographically variable waters in British Columbia. The results showed that changes in food quality were a major factor influencing the condition of the salmon.
Article
Biodiversity Conservation
Anne-Marie Flores, Morgan M. Davies, Katrina Kushneryk, Pippi T. E. S. Lawn, Sibylla Helms, Hanna M. Thomson, Kyle R. Nelson, Christopher W. Burns, Steven Roias, Travis G. Gerwing
Summary: Research findings show that the populations of juvenile coho salmon and juvenile coastal cutthroat trout in Lyall Creek have decreased to some extent over the past 15 years, with a more significant decline in the coastal cutthroat trout population. Further research is needed to understand the negative influences of human activities and environmental factors on Pacific salmon densities in Lyall Creek.
WESTERN NORTH AMERICAN NATURALIST
(2021)
Article
Environmental Sciences
Jason B. Fellman, Eran Hood, David D'Amore, Richard T. Edwards
Summary: The study found that the export of nitrogen and phosphorus from the perhumid coastal temperate rainforest of northwestern North America is influenced by seasonal and stormflow events, showing a pulsed nature in the magnitude and species of nutrients exported.
Article
Environmental Sciences
Rick T. Edwards, David V. D'Amore, Frances E. Biles, Jason B. Fellman, Eran W. Hood, Joel W. Trubilowicz, William C. Floyd
Summary: The coastal zone of southeast Alaska drains one of the wettest, carbon-rich, and most topographically varied regions in North America, with watersheds draining temperate rainforests, peatlands, glaciers, and large rivers from the drier interior. The southeast Alaska drainage basin discharges about twice as much water as the Columbia or Yukon Rivers, with a significant amount of dissolved organic carbon entering the adjacent marine system. This large and spatially distributed water and DOC input, along with the complex shoreline and estuarine volume, may have a significant impact on the metabolism of riverine DOC in coastal marine ecosystems.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Environmental Sciences
Sarah C. Fell, Jonathan L. Carrivick, Sophie Cauvy-Fraunie, Veronica Crespo-Perez, Eran Hood, Kate C. Randall, Kirsty J. Matthews Nicholass, Scott D. Tiegs, Alex J. Dumbrell, Lee E. Brown
Summary: The study found that glacier retreat is associated with increased decomposition, abundance of fungi, and a specific fungal cellulose-degrading gene. This demonstrates the potential for predicting ecosystem-level functions using gene-level data. Ongoing global decreases in glacier cover are expected to change vital ecosystem functions, including carbon cycle processes, in mountain rivers.
NATURE CLIMATE CHANGE
(2021)
Article
Environmental Sciences
Joanna C. Young, Erin Pettit, Anthony Arendt, Eran Hood, Glen E. Liston, Jordan Beamer
Summary: The study suggests that glacier runoff and total watershed runoff in the western Juneau Icefield are increasing due to sustained glacier mass loss. Moreover, the timing of maximum glacier ice melt is occurring earlier, potentially affecting downstream water resources and ecosystems. This highlights ongoing hydrological regime changes in high latitude coastal watersheds driven by glacier mass loss.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Ian J. W. Giesbrecht, Suzanne E. Tank, Gordon W. Frazer, Eran Hood, Santiago G. Gonzalez Arriola, David E. Butman, David D'Amore, David Hutchinson, Allison Bidlack, Ken P. Lertzman
Summary: In this study, a hydro-biogeochemical classification system was developed for watersheds draining to the coastal margin of the Northeast Pacific coastal temperate rainforest. Cluster analysis was used to group watersheds into 12 types based on watershed properties, and the classification was validated using streamflow and dissolved organic carbon measurements from rivers. The results showed that watershed types corresponded with differences in streamflow regime, mean annual runoff, DOC seasonality, and mean DOC concentration.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Ecology
Matthew R. Dunkle, Ryan A. Dunbeck, Christopher C. Caudill
Summary: The presence of carcasses can increase the density of juvenile salmon and decrease emigration rates, but contrary to expectations, there were no differences in growth rates among treatments. The decomposition traits of lamprey and trout carcasses mediate consumer behavioral responses and the incorporation of carcass subsidies into food webs.
Article
Environmental Sciences
Amy D. Holt, Anne M. Kellerman, Wenbo Li, Aron Stubbins, Sasha Wagner, Amy McKenna, Jason Fellman, Eran Hood, Robert G. M. Spencer
Summary: This study evaluated photochemistry as a mechanism to explain the compositional differences between allochthonous OM sources and glacier runoff DOM. The results showed that photodegradation could provide a mechanistic pathway for the disconnect between proposed aromatic, aged sources of OM and the aliphatic-rich fingerprint of glacial DOM, indicating molecular level convergence between aromatic-rich leachates and aromatic-poor glacial samples.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Biodiversity Conservation
J. Ryan Bellmore, Jason B. Fellman, Eran Hood, Matthew R. Dunkle, Richard T. Edwards
Summary: Mountain watersheds with glacier-, snow-, and rain-fed streams have distinct hydrologic, temperature, and biogeochemical characteristics. However, as glaciers diminish and precipitation changes, these characteristics will fade. This could lead to the loss of unique food webs and impact the ability of watersheds to sustain aquatic consumers.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Environmental Sciences
J. Jenckes, L. A. Munk, D. E. Ibarra, D. F. Boutt, J. Fellman, E. Hood
Summary: Glacialized coastal catchments of the Gulf of Alaska are experiencing rapid hydrologic fluctuations due to climate change. These catchments play a significant role in delivering dissolved and suspended inorganic and organic matter to the nearby marine environments, but little is known about the total solute and particulate fluxes to the ocean. This study presents data collected from 10 streams in two regions of Alaska, revealing the seasonal runoff patterns driven by glaciers and distinctive variations in stream water sources between regions. The study also highlights the differences in organic carbon export across the Gulf of Alaska and explores how future solutes and sediments may change as watersheds transition from glacial influenced to precipitation dominated.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Amy D. Holt, Anne M. Kellerman, Tom. I. Battin, Amy M. McKenna, Eran Hood, Patricio Andino, Veronica Crespo-Perez, Hannes Peter, Martina Schon, Vincent De Staercke, Michail Styllas, Matteo Tolosano, Robert G. M. Spencer
Summary: This study investigated the molecular composition and carbon isotopes of dissolved organic matter (DOM) in Ecuadorian glaciers and found that glacier outflows contained a high abundance of aliphatic and peptide-like compounds. The composition of glacier outflow DOM was associated with regional precipitation gradients, indicating a potential influence of atmospheric deposition on the composition of DOM.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Geosciences, Multidisciplinary
G. McNicol, E. Hood, D. E. Butman, S. E. Tank, I. J. W. Giesbrecht, W. Floyd, D. D'Amore, J. B. Fellman, A. Cebulski, A. Lally, H. McSorley, S. G. Gonzalez Arriola
Summary: The rivers in the northeast Pacific Coastal Temperate Rainforest export 3.5 Tg-C yr(-1) of dissolved organic carbon (DOC) to the ocean. Over 56% of this DOC flux comes from small coastal watersheds, which make up only 22% of the total drainage basin. The average DOC yield from these coastal watersheds is roughly three times higher than that from tropical regions worldwide. These findings suggest that the export of DOC from these watersheds plays a significant role in regional-scale heterotrophy within near-shore marine ecosystems in the northeast Pacific.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
E. H. Peitzsch, E. Hood, J. R. Harley, D. K. Stahle, N. E. Kichas, G. J. Wolken
Summary: Snow avalanches are a natural hazard with severe impacts worldwide. By using dendrochronological techniques, this study analyzed the historical frequency of large magnitude avalanches in southeast Alaska and found significant predictors such as February and March precipitation and the Oceanic Nino Index. The results can be used to inform infrastructure planning and avalanche mitigation in urban areas.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)