Results 91 to 100 of about 16,351 (250)

Refining techniques for high‐frequency monitoring of chlorophyll a fluorescence in estuarine systems

Limnology and Oceanography: Methods, EarlyView.
Abstract Concentrations of the photosynthetic pigment chlorophyll a are commonly used as a proxy for phytoplankton biomass in aquatic systems. Traditional methods for extracting chlorophyll a in discrete samples limit measurement frequency, while in situ sensor technology provides high frequency chlorophyll a fluorescence measurements at a more ...
Nicole Dix, Hannah Nicklay, Jacob Cianci‐Gaskill, Shannon Dunnigan Kimmel, J. Silas Tanner, Kim Cressman, Steven E. McMurray, Yoshimi M. Rii, Rikke Jeppesen, Rachel Guy, Erik Smith   +10 more
wiley   +1 more source

Enhance content of leaf chlorophylls and the primary root diameter of shallot (Allium cepa L.) with seed coating by rot fungi

International Journal of Agriculture System, 2019
Shallot production is affected by the cultivation techniques, one of them is seed coating. The technique is a practice by covering seeds by using particular substances such as growth regulators, micronutrients, fungicides, or antioxidants that increase ...
Iradhatullah Rahim, Syamsiar Zamzam, Suherman Suherman, Syamsia Syamsia, Selis Meriem, Yunarti Yunarti, Andi Nasruddin   +6 more
doaj   +1 more source

Sodium sulfite can reliably induce chemical hypoxia without toxic effects in the model sea anemone species, Exaiptasia diaphana

Limnology and Oceanography: Methods, EarlyView.
Abstract Climate change is accelerating the deoxygenation of aquatic ecosystems, so understanding its effects on biological processes is increasingly critical. An emerging method for inducing hypoxia during experimentation utilizes sodium sulfite (SSI) to scavenge oxygen; however, it remains unclear if hypoxia‐inducing concentrations of SSI are toxic ...
Zhen Qin, Lorenzo Vassura, Bianca A. Parodi, Elise M. J. Laetz   +3 more
wiley   +1 more source

Flow cytometric phytoplankton concentration and optical properties across instruments and laboratories

Limnology and Oceanography: Methods, EarlyView.
Abstract Flow cytometry measures the optical properties of individual cells and has become essential for enumerating and characterizing marine phytoplankton. Yet systematic comparison of measurements across instruments remains limited, hampering data comparison across laboratories and long‐term time series.
Francois Ribalet, Anne W. Thompson, E. Virginia Armbrust, Raffaella Casotti, Josep M. Gasol, Emily Peacock, Massimo C. Pernice, Nicole J. Poulton, Heidi M. Sosik, Angelicque E. White, Zackary Johnson   +10 more
wiley   +1 more source

Drivers of stability in plankton communities: dominance, asynchrony, and averaging effects across temporal, spatial and trophic scales

Oikos, EarlyView.
The origins of ecosystem stability have long intrigued ecologists. Recent theoretical advancements highlight three primary mechanisms driving stability: dominance, asynchrony and averaging. While plant community stability has been extensively studied, our understanding of marine community stability remains limited. Plankton, as key components of marine
Guido Occhipinti, Francesco Dattilo, Eva Álvarez, Cosimo Solidoro, Paolo Lazzari   +4 more
wiley   +1 more source

Determination of barley nitrogen status with chlorophyll meter for high β-amylase in grains

Agricultural and Food Science, 1995
The production of β-amylase is of great importance in two-rowed spring barley cv. Kymppi (Hordeum vulgare L.) in the Finland, where long-day conditions favour high enzyme activities.
Jari Peltonen, Ari Virtanen, Jaakko Helenius, Juha Suopelto, Kari Kittilä, Esko Eloranta   +5 more
doaj  

Indirect Estimations of Lentil Leaf and Plant N by SPAD Chlorophyll Meter

International Journal of Agronomy, 2015
A Soil Plant Analysis Development (SPAD) chlorophyll meter can be used to screen for leaf nitrogen (N) concentration in breeding programs. Lentil (Lens culinaris L.) cultivars were grown under varied N regimes, SPAD chlorophyll meter readings (SCMR) were
Hossein Zakeri, Jeff Schoenau, Albert Vandenberg, Mohammadreza Tayfeh Aligodarz, Rosalind A. Bueckert   +4 more
doaj   +1 more source

Use of chlorophyll-SPAD meter on potato and sorghum

, 2002
The SPAD-502 chlorophyll meter measures the transmittance of leaves at 430 nm~ which is a peak of maximum absorbance by chl, providing an indication of its chl content. Chlorophyll content of leaves or SPAD readings can be used as a nitrogen nutrition index of plants since most leafN is contained in chl molecules.
Rodrigues, M.A., Martins, Anabela, Ferraz, Hélder   +2 more
openaire   +1 more source

Integrating and assessing metacommunity drivers of ecosystem function and resilience in benthic algal systems

Oikos, EarlyView.
Understanding the scales and mechanisms by which species composition interacts with ecosystem functions is critical for forecasting the effects of environmental perturbations on ecosystem services. However, the linkages between what regulates the ecosystem functions of dispersal‐capable networks of communities (metacommunities) and what regulates a ...
Thomas P. Shannon, Evelyn E. Gaiser
wiley   +1 more source

Warming modifies trophic impacts of invading shrimp with impact varying among primary producers

Oikos, EarlyView.
Environmental change drivers, such as climate change and species invasions, can disrupt biological networks and weaken ecosystem stability. Acting together, these drivers may interact and alter the effects on the ecosystem. However, few studies have examined the interactive effects of climate change and species invasions, particularly in aquatic ...
Stefanie Coxe, Linnea Kivelä, Tawfiqur Rahman, Ulrika Candolin   +3 more
wiley   +1 more source