Spatial and temporal variability of algal community dynamics and productivity in floodplain wetlands along the Tanana River, Alaska

2014 ◽  
Vol 33 (3) ◽  
pp. 765-777 ◽  
Author(s):  
Allison R. Rober ◽  
Kevin H. Wyatt ◽  
R. Jan Stevenson ◽  
Merritt R. Turetsky
Keyword(s):  
Temporal Variability ◽  
Community Dynamics ◽  
Algal Community ◽  
Spatial And Temporal Variability ◽  
Floodplain Wetlands

scholarly journals The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae

2021 ◽  
Author(s):  
◽  
Francisca A.H. Vermeulen
Keyword(s):  
Community Structure ◽  
Southern Ocean ◽  
Sea Ice ◽  
Temporal Variability ◽  
Ross Sea ◽  
Pulse Amplitude ◽  
Integrated Approach ◽  
Algal Community ◽  
Spatial And Temporal Variability ◽  
Algal Groups

<p>Polar marine regions are dominated by sea ice, where large gradients in temperature, salinity, nutrients and light occur. Despite this, a rich community exists within the sea ice, consisting of prokaryotic organisms, several algal groups and small zooplankton. Prokaryotes are present in the largest abundance in the sea ice; however, diatoms dominate in biomass. Diatoms are the main primary producers within the ice and they form a vital food source for many organisms. However, factors determining species composition, abundance, spatial and temporal variability and nutrient requirement are relatively poorly understood. In order to increase understanding of these processes, an integrated approach was used in this thesis to provide an insight into the potential changes to the ecology of the Southern Ocean in relation to predicted climate change. In this thesis, I studied ice algal community structure, diversity and nutrient requirements at several locations in the sea ice of the Ross Sea, Antarctica. Though many previous studies have focussed on these organisms, this is the first study to I) integrate recent and historical data collected over 30 years and to compare spatial and temporal differences in sea ice communities, II) use the near real time nutrient induced fluorescence transient (NIFT) method to study nutrient limitation in sea ice and further develop this method for use with the imaging pulse amplitude modulator (I-PAM), III) show that Antarctic diatoms may be more susceptible to silica limitation than previously thought, despite the fact that the silica concentration in the Southern Ocean are relatively high. Results from these studies provide important new information on community structure and how it is influenced by and responds to the environment ...</p>

scholarly journals The Influences of Nutrients and Snow on the Spatial and Temporal Variability of Sea Ice Algae

2021 ◽  
Author(s):  
◽  
Francisca A.H. Vermeulen
Keyword(s):  
Community Structure ◽  
Southern Ocean ◽  
Sea Ice ◽  
Temporal Variability ◽  
Ross Sea ◽  
Pulse Amplitude ◽  
Integrated Approach ◽  
Algal Community ◽  
Spatial And Temporal Variability ◽  
Algal Groups

<p>Polar marine regions are dominated by sea ice, where large gradients in temperature, salinity, nutrients and light occur. Despite this, a rich community exists within the sea ice, consisting of prokaryotic organisms, several algal groups and small zooplankton. Prokaryotes are present in the largest abundance in the sea ice; however, diatoms dominate in biomass. Diatoms are the main primary producers within the ice and they form a vital food source for many organisms. However, factors determining species composition, abundance, spatial and temporal variability and nutrient requirement are relatively poorly understood. In order to increase understanding of these processes, an integrated approach was used in this thesis to provide an insight into the potential changes to the ecology of the Southern Ocean in relation to predicted climate change. In this thesis, I studied ice algal community structure, diversity and nutrient requirements at several locations in the sea ice of the Ross Sea, Antarctica. Though many previous studies have focussed on these organisms, this is the first study to I) integrate recent and historical data collected over 30 years and to compare spatial and temporal differences in sea ice communities, II) use the near real time nutrient induced fluorescence transient (NIFT) method to study nutrient limitation in sea ice and further develop this method for use with the imaging pulse amplitude modulator (I-PAM), III) show that Antarctic diatoms may be more susceptible to silica limitation than previously thought, despite the fact that the silica concentration in the Southern Ocean are relatively high. Results from these studies provide important new information on community structure and how it is influenced by and responds to the environment ...</p>

EVALUATION OF SPATIAL AND TEMPORAL VARIABILITY OF SOIL REDISTRIBUTION PROCESSES WITHIN AN ARABLE SLOPE (PAPER 2)

2015 ◽  
pp. 60
Author(s):  
Ju. S. Kuznetsova ◽  
V. R. Belyaev ◽  
M. V. Markelov ◽  
N. N. Ivanova
Keyword(s):  
Temporal Variability ◽  
Spatial And Temporal Variability ◽  
Soil Redistribution

Response of Corn Grain Yield to Spatial and Temporal Variability in Emergence

Crop Science ◽  
2004 ◽  
Vol 44 (3) ◽  
pp. 847 ◽  
Author(s):  
Weidong Liu ◽  
Matthijs Tollenaar ◽  
Greg Stewart ◽  
William Deen
Keyword(s):  
Grain Yield ◽  
Temporal Variability ◽  
Spatial And Temporal Variability ◽  
Corn Grain ◽  
Corn Grain Yield

Characterization of Spatial and Temporal Variability of Crassostrea spp. Spat Settlement to Ascertain Allocable Sites for Spat Collection at Cox's Bazar, Bangladesh

2021 ◽  
Author(s):  
Tashrif Mahmud Minhaz ◽  
Joyshri Sarker ◽  
Mohammed Nurul Absar Khan ◽  
Helena Khatoon ◽  
Md Abdul Alim ◽  
...  
Keyword(s):  
Temporal Variability ◽  
Spatial And Temporal Variability ◽  
Spat Collection ◽  
Spat Settlement

Regionalized phosphorus fate factors for freshwater eutrophication in Bahia, Brazil: an analysis of spatial and temporal variability

2021 ◽  
Author(s):  
Maíra Caetano de Andrade ◽  
Cássia Maria Lie Ugaya ◽  
José Adolfo de Almeida Neto ◽  
Luciano Brito Rodrigues
Keyword(s):  
Temporal Variability ◽  
Spatial And Temporal Variability ◽  
Freshwater Eutrophication
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