Results 91 to 100 of about 1,114,918 (311)

Seasonal Changes in the Concentration of Chlorophyll “A” in the Waters of the Siemiatycze Reservoir

open access: yesArchitecture, Civil Engineering, Environment
The concentration of chlorophyll “a” is an important parameter of water quality, because it characterizes the amount, variety of phytoplankton and algae biomass in the water.
Szatyłowicz Ewa, Siemieniuk Anna
doaj   +1 more source

Bacterioplankton dynamics during winter freezing in a meltwater pond near Bratina Island, Antarctica

open access: yesFrontiers in Microbiology
The Bratina Island meltwater ponds, on the Ross Ice Shelf in Antarctica, undergo an annual freeze thaw cycle that results in progressive, extreme changes to the physical and chemical environments of the ponds.
Stephen E. Noell   +8 more
doaj   +1 more source

Seasonal Changes in Titan's Surface Temperatures [PDF]

open access: yes, 2011
Seasonal changes in Titan's surface brightness temperatures have been observed by Cassini in the thermal infrared. The Composite Infrared Spectrometer (CIRS) measured surface radiances at 19 micron in two time periods: one in late northern winter (Ls ...
Carlson, R. C.   +11 more
core   +3 more sources

Temperature and Farm Labor in Nigeria

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT We estimate the impact of temperature shocks on the composition of farm labor in rural Nigeria using a nationally representative household panel survey. Leveraging plausibly exogenous year‐to‐year variation in growing season temperatures, we find that warmer temperatures significantly alter farm labor composition, prompting a substantial shift
Andu Berha
wiley   +1 more source

Seasonal variation in red fox (Vulpes vulpes) diet across agricultural and forest habitats in central Hungary

open access: yesTheriologia Ukrainica
We investigated how seasonal and site-specific differences in food abundance affect the feeding habits of the red fox (Vulpes vulpes). To address this question, we analysed 356 scats collected over three years at four localities of central Hungary ...
Ishtvan Zhelitski
doaj   +1 more source

Seasonal changes in organic carbon content in post-arable forest soils

open access: yesSoil Science Annual, 2019
The purpose of this work is to determine seasonal changes in the organic carbon content in the mineral topsoil horizon of the Dystric Brunic Arenosols currently used as forest.
Dłużewski Paweł   +2 more
doaj   +1 more source

Seasonal changes in growth of coho salmon (Oncorhynchus kisutch) off Oregon and Washington and concurrent changes in the spacing of scale circuli [PDF]

open access: yes, 2005
In this study we present new information on seasonal variation in absolute growth rate in length of coho salmon (Oncorhynchus kisutch) in the ocean off Oregon and Washington, and relate these changes in growth rate to concurrent changes in the spacing of
Fisher, Joseph P., Pearcy, William G.
core  

Seasonal diet changes in elephant and impala in mopane woodland [PDF]

open access: yes
Elephant and impala as intermediate feeders, having a mixed diet of grass and browse, respond to seasonal fluctuations of forage quality by changing their diet composition.
Boer, W.F., de   +13 more
core   +2 more sources

Seasonal changes in dry matter yield from Karst pastures as influenced by morphoclimatic features [PDF]

open access: yes, 2018
Pastures are strongly affected by local environmental variables in terms of their species richness, plant composition and herbage production. A multi-site monitoring study was conducted over three years to investigate the influence of morphoclimatic ...
Fazzini, Massimiliano   +5 more
core   +4 more sources

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