A5044682728- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Ocean Acidification Effects and Responses
- Marine and fisheries research
- Marine and coastal plant biology
- Marine Bivalve and Aquaculture Studies
- Polar Research and Ecology
- Microbial Community Ecology and Physiology
- Avian ecology and behavior
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Geological and Geophysical Studies
- Coastal and Marine Management
- Marine animal studies overview
- Fish Ecology and Management Studies
- Arctic and Russian Policy Studies
- Spaceflight effects on biology
- Geological formations and processes
- Environmental Education and Sustainability
Stanford University
2016-2023
Stanford Medicine
2020
Food for thought Phytoplankton abundances in the Arctic Ocean have been increasing over recent decades as region has warmed and sea ice disappeared. The presumptive causes of this increase were expanding open water area a longer growing season—at least until now. Lewis et al. show that although these factors may driven productivity trends before, past decade, phytoplankton primary production rose by more than half because increased concentrations (see Perspective Babin). This finding means...
Abstract As the physical environment of Arctic Ocean shifts seasonally from ice‐covered to open water, limiting resource for phytoplankton growth light nutrients. To understand photophysiological responses these environmental changes, we evaluated photoacclimation strategies during low‐light, high‐nutrient, spring and high‐light, low‐nutrient, ice‐free summer. Field results show that effectively acclimated reduced irradiance beneath sea ice by maximizing absorption photosynthetic capacity....
Abstract As the Arctic Ocean (AO) is increasingly altered by anthropogenic climate change, it critical that we accurately assess ongoing changes in its capacity to support marine life. color remote sensing provides an effective tool estimate phytoplankton biomass and net primary production undersampled AO. However, standard algorithms have been parameterized using global data sets severely underrepresent Because optical properties of AO waters differ markedly from those lower‐latitude...
Abstract The Palmer Long‐Term Ecological Research program has sampled waters of the western Antarctic Peninsula (wAP) annually each summer since 1990. However, information about wAP prior to peak phytoplankton bloom in January is sparse. Here we present results from a spring process cruise that early stages development 2014. Sea ice concentrations were high on shelf relative nonshelf waters, especially toward south. Macronutrients and nonlimiting growth both while dissolved iron only shelf....
Abstract Light and dissolved iron (dFe) availability control net primary production (NPP) in much of the Southern Ocean, but controller during spring western Antarctic Peninsula has never been assessed. Underwater light dFe are sensitive to climate‐induced changes upper ocean circulation, stratification, sea ice cover, which can affect NPP phytoplankton community composition, both alter carbon drawdown food web structure. We estimated situ NPP, production, heterotrophic respiration...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 621:33-50 (2019) - DOI: https://doi.org/10.3354/meps13000 Effects of iron and light availability on phytoplankton photosynthetic properties in Ross Sea Anne-Carlijn Alderkamp1,2, Gert L. van Dijken1, Kate E. Lowry1, M. Lewis1, Hannah Joy-Warren1, Willem de Poll3, Patrick Laan4, Loes Gerringa4, Tom O....
Abstract Spring phytoplankton growth in polar marine ecosystems is limited by light availability beneath ice‐covered waters, particularly early the season prior to snowmelt and melt pond formation. Leads of open water increase transmission ocean are sites air‐sea exchange. We explore role leads controlling bloom dynamics within sea ice zone Arctic Ocean. Data presented from spring measurements Chukchi Sea during Study Under‐ice Blooms In Ecosystem (SUBICE) program May June 2014. observed...
Abstract To understand the controls on distributions of ice algal communities in spring and role algae under‐ice bloom development through possible seeding, we sampled water column Chukchi Beaufort Seas over summer. Field observations showed that high springtime concentrations bottom were released from into by Furthermore, during our sampling, highly variable. Declines biomass physiological state correlated with melt, rather than light or nutrient availability. Nonparametric multivariate...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 586:91-112 (2018) - DOI: https://doi.org/10.3354/meps12367 Distribution of Phaeocystis antarctica-dominated sea ice algal communities and their potential seed phytoplankton across western Antarctic Peninsula in spring Virginia Selz1,*, Kate E. Lowry1, M. Lewis1, Hannah L. Joy-Warren1, Willem van de Poll2,...
Abstract Light and iron availability are intertwined in controlling Southern Ocean primary production because several photosynthetic proteins require iron. Changes light can also affect phytoplankton species composition, which impacts nutrient cycling, carbon drawdown, food web structure. To investigate the interactive effects of on growth, photosynthesis, photoacclimation strategy, micronutrient stress‐induced protein expression, we conducted five bioassay experiments during spring waters...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 25:1-18 (2014) - DOI: https://doi.org/10.3354/esr00611 Using integrated land- and boat-based surveys inform conservation of Critically Balearic shearwater Alice R. Jones1,6,*, Russell B. Wynn1, Pierre Yésou2, Laurent Thébault3, Philip Collins1,4, Lavinia Suberg1, Kate M. Lewis5, Tom Brereton5 1National Oceanography...
Global climate change is raising Arctic temperatures, warming ocean waters, and melting sea ice at unprecedented rates, creating new opportunities for industry development risks. As industries local communities become increasingly active in newly accessible a robust dynamic regulatory regime needed to reduce safety environmental risks balance competing needs of multiple resource user groups, all while continually adapting rapidly changing environmental, economic, social conditions. Such...
In this study photo-identification data were used to better understand movements, population structure and abundance of common bottlenose dolphin ( Tursiops truncatus ) in south-west England surrounding waters, inform conservation efforts. A catalogue 485 photographic sightings 113 individuals was compiled from ~150 encounters made on 87 dates between March 2007 January 2014. From these other data, three likely sub-populations identified the western English Channel, demarcated by bathymetry...
As sea ice is declining rapidly in the Arctic, phytoplankton are being exposed to very different light regimes. Here we investigated how photoacclimate three irradiance regimes: under ice, marginal zone, and open water. We sampled from these regimes spring–summer 2016 during Green Edge cruise Baffin Bay. also conducted experiments investigate impact of short-term surface exposure on photophysiology, focusing processes related photoprotection photodamage. These were designed simulate mixing...
This study presents a novel framework for estimating safe swimming distances at beaches and is the first participatory environmental science to experimentally test strategies increasing volunteer retention.