Article
Geography, Physical
David Vazquez-Loureiro, Alberto Saez, Vitor Goncalves, Teresa Buchaca, Armand Hernandez, Pedro M. Raposeiro, Erik J. de Boer, Pere Masque, Santiago Giralt, Roberto Bao
Summary: This study investigates the sediment records of two volcanic lakes located within the same caldera and finds that they responded differently to climate changes, influenced by volcanic eruptions and local environmental factors.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Peter J. K. Puleo, Andrew L. Masterson, Andrew S. Medeiros, Grace Schellinger, Regan Steigleder, Sarah Woodroffe, Magdalena R. Osburn, Yarrow Axford
Summary: This study investigates climate changes during the Younger Dryas period in Greenland by examining lake sediment in south Greenland. The results show that climate changes in south Greenland during the Younger Dryas were larger than in central Greenland, indicating a greater sensitivity to changes in North Atlantic Ocean circulation. Additionally, the study finds that the winter warming at the end of the Younger Dryas in south Greenland was stronger compared to the summer warming.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Svetlana S. Kostrova, Boris K. Biskaborn, Luidmila A. Pestryakova, Francisco Fernandoy, Marlene M. Lenz, Hanno Meyer
Summary: The new dataset from Lake Emanda in northeastern Siberia provides insights into the climate and environmental dynamics in an extreme continental setting. The study reveals a relatively cold oligotrophic freshwater lake system persisting for the last 13.2 cal ka BP, with fluctuations in diatom records reflecting changes in past climate conditions throughout the Holocene. The patterns observed in the Lake Emanda delta O-18(diatom) record show similarities to those of Lake El'gygytgyn, suggesting a common regional signal in both records despite some hydrological differences.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Matthew S. Finkenbinder, Byron A. Steinman, Broxton W. Bird, Ellen C. Heilman, Alexandria R. Aspey, Samuel Z. Mark, Nathan D. Stansell, Alejandro Fernandez, Sid P. Halsor, Mark B. Abbott
Summary: This study presents a carbonate oxygen isotope record from Norman's Pond in Newfoundland, Canada, which provides insights into the spatiotemporal patterns and underlying causes of climate variations in the North Atlantic region over the past 5000 years. The results show a general trend of cooling over the last 5000 years, with significant fluctuations during the early Medieval Climate Anomaly and the Little Ice Age.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Xiaosen Zhang, Jianbao Liu, Kathleen M. Ruhland, Xin Jia, Jane M. Reed, Yanling Li, Zhongwei Shen, Jiaju Zhao, Jie Chen, Haipeng Wang, Xin Wang, John P. Smol, Fahu Chen
Summary: Through the study of high-resolution lake sediment records from northern China, it is found that the rise of the Earth's crust has led to significant changes in lake temperatures, which corresponds to the increase in mid-Holocene warm-season temperatures in China. Combined with reliable pollen-inferred precipitation data from northern China, it can be independently verified that the East Asian thermal and summer monsoon reached their maxima synchronously during the mid-Holocene, indicating that the interaction between heat and temperature is the most probable mechanism for the East Asian summer monsoon throughout the Holocene.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Geography, Physical
Sophie B. Lehmann, Byron A. Steinman, Matthew S. Finkenbinder, Mark B. Abbott
Summary: This study investigates early Holocene drought in the Pacific Northwest region, revealing prolonged dry periods between 11,200 and 6200 cal yr BP. The droughts were likely caused by higher summer insolation and reduced winter precipitation/snowpack, highlighting the sensitivity of hydroclimate in the region to changes in temperature and precipitation levels.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Boris K. Biskaborn, Larisa Nazarova, Tim Kroeger, Lyudmila A. Pestryakova, Liudmila Syrykh, Gregor Pfalz, Ulrike Herzschuh, Bernhard Diekmann
Summary: The study examines millennial-scale climate change history in eastern Siberia by analyzing multi-proxy time series derived from sediment cores of Lake Bolshoe Toko in southeastern Yakutia, Russia. The changes in diatom species abundances are related to repeated episodes of thermal stratification and specifically to the onset of the Holocene Thermal Maximum. The analysis also reveals relationships between sediment-geochemical data, paleoclimate variability, and diatom species richness, showing a lag in changes of diatom alpha diversity behind deposited organic carbon concentrations.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geography, Physical
Graham R. Mushet, Eduard G. Reinhardt, Ryan Whitehouse, Brian F. Cumming
Summary: The Holocene Thermal Maximum is well-understood with regards to its external drivers and regional expressions, particularly in lake ecosystems. However, the connection between mid-to-late Holocene climate, drivers, and lake response is less understood, especially in western North America. A study of a small lake in British Columbia revealed shifts in effective moisture levels and the influence of Pacific ocean-atmosphere processes on late Holocene declines in effective moisture throughout the southern Interior Plateau.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Hanno Meyer, Svetlana S. Kostrova, Philip Meister, Marlene M. Lenz, Gerhard Kuhn, Larisa Nazarova, Liudmila S. Syrykh, Yury Dvornikov
Summary: The diatom oxygen isotope composition from Lake Bolshoye Shchuchye in Arctic Russia is analyzed to understand the hydrological and climate dynamics. The study reveals that the diatom oxygen isotope record is associated with changes in summer insolation and Northern Hemisphere temperature. Short-term variations in the record are attributed to variations in snow melt and influx. This is the first study to identify such drastic centennial-scale hydrological changes in Holocene diatom oxygen isotopes.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Environmental Sciences
Andreas Laug, Torsten Haberzettl, Andre Pannes, Anja Schwarz, Falko Turner, Junbo Wang, Stefan Engels, Sonja Rigterink, Nicole Boerner, Marieke Ahlborn, Jianting Ju, Antje Schwalb
Summary: The Tibetan Plateau, known as the Water Tower of Asia, responds significantly to modern climate changes. Lake sediment archives provide insights into past climate changes driven by processes like Monsoon intensity. Multiple sediment cores from a lake can help distinguish between widespread trends and local events.
JOURNAL OF PALEOLIMNOLOGY
(2021)
Article
Biodiversity Conservation
Laura C. Streib, Jeffery R. Stone, Eva C. Lyon, Hung H. Quang, Kevin M. Yeager, Susan R. H. Zimmerman, Michael M. McGlue
Summary: This study analyzed lake sediment records from the eastern Sierra Nevada over the past three millennia to reveal ecological changes driven by hydroclimate oscillations. Results showed that hot-dry conditions of the Industrial Era altered lake state, leading to profound impacts on high-elevation lakes and the ecosystem services they provide.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Environmental Sciences
Mark A. Stevenson, Ruth L. Airs, Geoffrey D. Abbott
Summary: Arctic sea ice is declining, with 2018 experiencing the lowest ice extent. Research in the Barents Sea shows a link between organic geochemical characteristics and ice melt, suggesting the significant impact of organic matter deposition on benthic organisms and carbon sequestration.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Olivier Jacques, Reinhard Pienitz
Summary: This paper presents diatom analyses and complementary carbon and nitrogen data from lakes in the Becancour River Basin, revealing the natural limnological history and the long-lasting and dramatic effects of human activities on the lakes.
Article
Environmental Sciences
Madi Perrett, Branaavan Sivarajah, Cynthia L. Cheney, Jennifer B. Korosi, Linda Kimpe, Jules M. Blais, John P. Smol
Summary: This study examined the long-term impacts of past regional gold mining activities on sub-Arctic lakes near Con Mine, finding that the lakes were influenced by metal(loid) pollution and salt-rich mine drainage. The presence of halophilic diatom species in recent sediments suggests that extreme saline conditions continue to affect the biota over a decade after mining activities ceased. The lack of biological recovery indicates the ongoing challenges faced by mine-impacted lakes in terms of elevated contaminant levels and emerging stressors like climate warming and land-use changes.
ENVIRONMENTAL POLLUTION
(2021)
Article
Ecology
Simon Belle, Ilmar Tonno, Tobias Vrede, Rene Freiberg, Jenny Nilsson, Willem Goedkoop
Summary: Studies have shown that both long-term climate trends and short-term fluctuations can have major effects on algae-zooplankton interactions in boreal lakes, with climate events such as the Little Ice Age causing changes in algal biomass and community composition. In addition, temperature fluctuations were observed to contribute to regulating these interactions, with recent anthropogenic changes also impacting algae-zooplankton interactions.
FRESHWATER BIOLOGY
(2021)
Article
Marine & Freshwater Biology
William O. Hobbs, Theo W. Dreher, Edward W. Davis, Rolf D. Vinebrooke, Siana Wong, Tim Weissman, Michael Dawson
Summary: Lakes experiencing toxic cyanobacteria blooms due to cultural eutrophication are often affected by increased nutrient inputs. This study presents a sediment core record from a parkland-surrounded lake with abundant cyanobacteria, showing the emergence of a toxin-producing cyanobacterial species in the mid-1990s. The historical presence of cyanobacteria in the lake has influenced the current ecosystem, promoting the dominance of toxin-producing cyanobacteria.
Article
Limnology
Charlie J. G. Loewen, Rolf D. Vinebrooke, Ron W. Zurawell
Summary: Integrating species traits in direct gradient analysis provided insights into community assembly and responses to environmental changes. The study on phytoplankton trait-environment relationships in north-temperate lakes and reservoirs in Alberta, Canada revealed both local- and regional-scale drivers of succession, with evidence of deterministic filtering by traits increasing in mid-summer. The research also highlighted potential anthropogenic cross-scale interactions and associations between biogeographic factors and various morphological, physiological, and behavioral traits.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Geography, Physical
Aslaug Geirsdottir, Gifford H. Miller, David J. Harning, Hrafnhildur Hannesdottir, Thor Thordarson, Ingibjorg Jonsdottir
Summary: The study reconstructs the retreat process of the Iceland Ice Sheet in south Iceland using sediment records from Hestvatn, revealing the occurrence of glacial lake outburst floods and suggesting a possible link between subglacial volcanic activity and the events.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Ecology
Emma A. Elliott Smith, Michael D. Fox, Marilyn L. Fogel, Seth D. Newsome
Summary: Carbon isotope fingerprinting using multivariate analysis has been applied in ecological studies to measure essential amino acids. This study evaluated the consistency in isotopic fingerprints among nearshore primary producers and identified the biochemical mechanisms driving these patterns. The results showed a high consistency in isotopic fingerprints of marine algae across space and time, with kelps and rhodophytes exhibiting distinct patterns. Taxonomy and site locality were found to be important determinants of individual amino acid delta C-13 values.
FUNCTIONAL ECOLOGY
(2022)
Article
Engineering, Environmental
Benjamin T. Burpee, Jasmine E. Saros, Leora Nanus, Jill Baron, Janice Brahney, Kyle R. Christianson, Taylor Ganz, Andi Heard, Beth Hundey, Karin A. Koinig, Jiri Kopacek, Katrina Moser, Koren Nydick, Isabella Oleksy, Steven Sadro, Ruben Sommaruga, Rolf Vinebrooke, Jason Williams
Summary: Increased nitrogen deposition in North American and European mountain lakes over the past century has had varying ecological impacts due to the local characteristics of the lakes and their watersheds. This study evaluated the sensitivity of mountain lakes to nitrogen deposition and found that it is influenced by factors such as deposition rates and spatial variability. The study also highlighted the importance of conducting subregional analyses to understand the specific predictors of lake sensitivity to nitrogen deposition.
Correction
Engineering, Environmental
Benjamin T. Burpee, Jasmine E. Saros, Leora Nanus, Jill Baron, Janice Brahney, Kyle R. Christianson, Taylor Ganz, Andi Heard, Beth Hundey, Karin A. Koinig, Jiri Kopacek, Katrina Moser, Koren Nydick, Isabella Oleksy, Steven Sadro, Ruben Sommaruga, Rolf Vinebrooke, Jason Williams
Article
Marine & Freshwater Biology
Sol Porcel, Marilyn L. Fogel, Irina Izaguirre, Ignacio Roesler, Julio L. Lancelotti
Summary: The introduction of rainbow trout in naturally fishless lakes in the reproductive area of the endangered Hooded Grebe has been found to impact the food web structure and carbon source utilization of the aquatic community. The presence of trout leads to an increase in trophic redundancy and changes in the spatial distribution and diet of the Grebe's main prey.
Article
Multidisciplinary Sciences
Jonathan H. Raberg, Gifford H. Miller, Aslaug Geirsdottir, Julio Sepulveda
Summary: Bacterial brGDGT lipids are widely used in the study of terrestrial paleoclimate, and their distributions are correlated with environmental temperature and pH. This research found strong resemblances in the relationships between brGDGT fractional abundances and both temperature and pH, suggesting a physiological and/or biochemical basis for observed brGDGT distributions.
Review
Ecology
Olivia F. Morris, Charlie J. G. Loewen, Guy Woodward, Ralf B. Schaefer, Jeremy J. Piggott, Rolf D. Vinebrooke, Michelle C. Jackson
Summary: The study found that the impacts of climate warming on freshwater ecosystems are usually determined by the stronger stressor, especially when this stressor is associated with human land use. Predicting the effects of multiple stressors depends on the identity of the stressors and the asymmetry of their effects.
Article
Biology
Ileana Perez-Rodriguez, Stefan M. Sievert, Marilyn L. Fogel, Dionysis Foustoukos
Summary: We investigated the impact of pressure on thermophilic, chemolithoautotrophic NO3- reducing bacteria isolated from deep-sea hydrothermal vents. Results showed that higher pressure resulted in decreased NO3- consumption, lower cell concentrations, and slower growth. However, nitrogen isotope fractionation effects from the chemolithoautotrophic NO3- reduction were maintained under all pressure conditions. Comparisons between natural hydrothermal vent fluid microbial communities and laboratory isolates suggested similar chemolithoautotrophic NO3- reducing activities. Our results contribute to the understanding of the relationship between pressure, temperature, redox conditions, and anaerobic chemolithoautotrophic processes.
Article
Fisheries
Bobby J. Nakamoto, Carson A. Jeffres, Nicholas J. Corline, Mollie Ogaz, Christina J. Bradley, Joshua H. Viers, Marilyn L. Fogel
Summary: Using compound-specific isotope analysis, we determined the biosynthetic source of amino acids in fish from major tributaries to the Sacramento-San Joaquin river delta in California. Our findings confirm the importance of algae in floodplain food webs in California's Central Valley, while also identifying other sources of amino acids contributing to fish.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Ecology
Sydney R. Huculak, Suzanne E. Tank, Greg S. Piorkowski, Madison Kobryn, Rolf D. Vinebrooke
Summary: Land-use practices can lead to the deterioration of aquatic ecosystems in lower-order streams by increasing nutrient availability for periphytic algae. Nitrogen is identified as the primary limiting factor for algal biomass accrual. Other environmental factors have minimal impact on algal growth. Therefore, increased attention should be given to nitrogen in watershed management plans during the summer to mitigate eutrophication in agricultural streams.
FRESHWATER SCIENCE
(2022)
Article
Environmental Sciences
Jonathan H. Raberg, Edgart Flores, Sarah E. Crump, Greg de Wet, Nadia Dildar, Gifford H. Miller, Aslaug Geirsdottir, Julio Sepulveda
Summary: Paleotemperature histories derived from lake sediment archives are valuable for understanding modern and future climate changes. Branched glycerol dialkyl glycerol tetraether (brGDGT) lipids are useful for studying temperature changes due to their empirical correlation with temperature. However, the sources of brGDGTs in lake sediments and their contributions are difficult to determine. This study explores the potential of intact brGDGTs in providing insights into the sources and contributions of brGDGTs in Arctic lakes.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Fisheries
Jenna Cook, Charlie J. G. Loewen, Tamika L. Nagao, Mark D. Graham, Rolf D. Vinebrooke
Summary: Remote mountain lakes in protected areas are valuable indicators for studying ecological impacts of extreme environmental changes. This study examined the relationships between phytoplankton communities and environmental factors in 82 lakes and found that taxonomic composition was more indicative of environmental changes than total biomass. Changes in total phosphorus, glacial coverage, underwater light availability, and dissolved organic carbon were reflected by variances in taxonomically diagnostic algal pigments and genera. The findings of this study provide a baseline for future lake monitoring programs in the Canadian Rockies as they face climate change and landscape variations.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Geochemistry & Geophysics
Brendan T. Reilly, Joseph S. Stoner, Saedis Olafsdottir, Anne Jennings, Robert Hatfield, Greta Bjork Kristjansdottir, Aslaug Geirsdottir
Summary: We investigated the amplitude and frequency of geomagnetic change in the Northern North Atlantic region over the past 15 thousand years. Using high-resolution sediment cores, we validated prior results and provided stronger geochronological constraints on the paleomagnetic secular variation signal. Our study also revealed greater variability and higher amplitudes on centennial timescales, which is important for understanding the geodynamo.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)