Results 71 to 80 of about 86,378 (349)

An autonomous and economical benthic incubation chamber for measuring dissolved oxygen fluxes in shallow, low‐flow environments

Limnology and Oceanography: Methods, EarlyView.
Abstract Benthic incubation chambers enclose a known volume of water overlying a known area to measure water chemistry changes and are typically used to quantify the metabolic activity of benthic organisms or communities. Here we present an economical benthic incubation chamber for shallow, low‐flow environments, built using off‐the‐shelf components ...
Luke D. Groff, Peter Berg, Karen J. McGlathery   +2 more
wiley   +1 more source

A lightweight clear liquid optical chamber baited remote underwater video system for monitoring fish in turbid coastal wetlands

Limnology and Oceanography: Methods, EarlyView.
Abstract Clear liquid optical chamber baited remote underwater video systems (CLOC‐BRUV) are an effective option for assessing fish assemblages in turbid water, but current designs are limited by their large size and high operational costs. We developed a lightweight CLOC‐BRUV unit and evaluated its performance through proof‐of‐concept trials and field
Hsin‐Wei Huang, Yu‐Jia Lin, Jing‐Ying Wu, Meng‐Hsien Chen   +3 more
wiley   +1 more source

Diatom Proteomics Reveals Unique Acclimation Strategies to Mitigate Fe Limitation [PDF]

, 2015
Phytoplankton growth rates are limited by the supply of iron (Fe) in approximately one third of the open ocean, with major implications for carbon dioxide sequestration and carbon (C) biogeochemistry.
Boyd, Philip W., Faux, Jessica F., Goodlett, David R., Harvey, H. Rodger, Hippmann, Anna A., Maldonado, Maria T., Nunn, Brook L., Strzepek, Robert F.   +7 more
core   +1 more source

Performance of a glider‐mounted multifrequency echosounder for measuring the vertical distribution and abundance of large pelagic copepods

Limnology and Oceanography: Methods, EarlyView.
Abstract The difficulty of sampling zooplankton communities in situ has driven advancements in autonomous, remote sensing technology. The goal of this paper was to perform a gear comparison study testing the performance of one such piece of technology—a glider‐mounted four‐frequency echosounder—against traditional shipboard methods of measuring ...
Delphine Mossman, Joseph D. Warren, Natasha J. Hynes, Kimberley T. A. Davies   +3 more
wiley   +1 more source

Factors affecting methylmercury biomagnification by a widespread aquatic invertebrate predator, the phantom midge larvae Chaoborus [PDF]

, 2012
MeHg biomagnification by the phantom midge Chaoborus in relation to MeHg concentrations in their prey and its migratory behavior was investigated in two Canadian Precambrian Shield lakes.
Aldamman, Lama, Amyot, Marc, Bourdiol, Floriane, Le Jeune, Anne-Hélène, Perron, Tania, Pinel-Alloul, Bernadette   +5 more
core   +2 more sources

Sampling effort to characterize estuarine macroinfaunal communities in patchy habitats

Limnology and Oceanography: Methods, EarlyView.
Abstract Estuarine benthic macroinfauna have aggregated, patchy distributions, making accurate community measurements dependent upon sampling scales. The purpose of this study is to determine the appropriate core sizes and sampling effort needed to characterize benthic infaunal communities in Corpus Christi Bay, Texas, USA.
Paul A. Montagna
wiley   +1 more source

Is there a Microbial Loop in Lake Baikal? [PDF]

Журнал Сибирского федерального университета: Серия Биология, 2012
The occurrence of a microbial loop in the pelagic environment is discussed with regard to hydrological and meteorological effects as well as to the planktological states during the seasons in lake Baikal.
Manfred Bölter, Lyubov R. Izmestyeva
doaj  

Observing biogeochemical cycles at global scales with profiling floats and gliders: prospects for a global array [PDF]

, 2009
Chemical and biological sensor technologies have advanced rapidly in the past five years. Sensors that require low power and operate for multiple years are now available for oxygen, nitrate, and a variety of bio-optical properties that serve as proxies ...
Berelson, W. M., Boss, E. S., Chase, Z., Claustre, H., Emerson, S. R., Gruber, N., Johnson, K. S., Körtzinger, Arne, Perry, M. J., Riser, S. C.   +9 more
core   +6 more sources

Red, green, blue color indices as proxy for Symbiodiniaceae cell density and chlorophyll content during coral bleaching

Limnology and Oceanography: Methods, EarlyView.
Abstract Coral bleaching, the breakdown of the symbiosis between the coral host and endosymbiotic microalgae, is the main cause of widespread coral reef degradation. Current visual assessment methods for coral health, including color reference cards, are constrained by subjective human color perception and limited resolution.
Erik Francesco Ferrara, Lavinia Bauer, Giulia Puntin, Friederike Bautz, Sibel Celayir, Marie‐Sa Do, Frederik Eck, Melissa Heider, Pia Wissel, Angelina Arnold, Thomas Wilke, Jessica Reichert, Maren Ziegler   +12 more
wiley   +1 more source

Evidence of summer thermal stratification in extreme northern lakes

Arctic Science
Rapid warming in the High Arctic has induced changes in terrestrial environments that have included major recent shifts in lakes and ponds. Numerous studies exist of spatial trends in water chemistry, bioindicator groups, and paleoenvironmental change ...
Dermot Antoniades, Yohanna Klanten, Emma Cameron, Julia Garcia-Oteyza, Marc Oliva, Warwick F. Vincent   +5 more
doaj   +1 more source