Spatial and temporal patterns of spawning and larval hatching by the horseshoe crab,Limulus polyphemus, in a microtidal coastal lagoon

Estuaries ◽  
2003 ◽  
Vol 26 (3) ◽  
pp. 631-640 ◽  
Author(s):  
Gretchen S. Ehlinger ◽  
Richard A. Tankersley ◽  
Mark B. Bush
Keyword(s):  
Coastal Lagoon ◽  
Horseshoe Crab ◽  
Temporal Patterns ◽  
Limulus Polyphemus ◽  
Spatial And Temporal Patterns ◽  
Larval Hatching

Comparisons of assemblages of phytoplankton between open water and seagrass habitats in a shallow coastal lagoon

2004 ◽  
Vol 55 (5) ◽  
pp. 447 ◽  
Author(s):  
S. P. Cummins ◽  
D. E. Roberts ◽  
P. Ajani ◽  
A. J. Underwood
Keyword(s):  
Relative Abundance ◽  
Coastal Lagoon ◽  
Human Activities ◽  
Spatial Scales ◽  
Temporal Patterns ◽  
Open Water ◽  
Spatial And Temporal Patterns ◽  
Halophila Ovalis ◽  
Zostera Capricorni

Patterns of phytoplankton in areas with seagrass (Zostera capricorni, Halophila ovalis, and Ruppia megacarpa) and areas without seagrass were quantified in an estuary near Sydney, NSW, Australia. Replicate samples (separated by metres) were collected on 20 randomly chosen occasions over almost 3 years, from two sites (separated by tens of metres) nested in both habitats, at four locations (separated by kilometres). Areas with seagrass often supported a significantly different assemblage of phytoplankton compared with areas without seagrass. Dissimilarities were due to small differences in the relative abundance of taxa, particularly the diatom Pseudonitzschia cf. pseudodelicatissima, rather than the presence or absence of specific taxa. In both habitats, abundances of phytoplankton were patchy at all of the spatial scales sampled, although most of the variation was among replicate samples. These findings emphasise the need to incorporate a hierarchy of scales in programs designed to understand processes that cause spatial and temporal patterns of phytoplankton or to detect changes in response to human activities.

Quaternary structure of Limulus polyphemus hemocyanin

1978 ◽  
Vol 36 (2) ◽  
pp. 176-177
Author(s):  
T. Wichertjes ◽  
E.J. Kwak ◽  
E.F.J. Van Bruggen
Keyword(s):  
Electron Microscopy ◽  
Functional Properties ◽  
Horseshoe Crab ◽  
Temperature Jump ◽  
Quaternary Structure ◽  
Crystallographic Analysis ◽  
Limulus Polyphemus ◽  
Oxygen Binding ◽  
X Ray ◽  
Intact Molecule

Hemocyanin of the horseshoe crab (Limulus polyphemus) has been studied in nany ways. Recently the structure, dissociation and reassembly was studied using electron microscopy of negatively stained specimens as the method of investigation. Crystallization of the protein proved to be possible and X-ray crystallographic analysis was started. Also fluorescence properties of the hemocyanin after dialysis against Tris-glycine buffer + 0.01 M EDTA pH 8.9 (so called “stripped” hemocyanin) and its fractions II and V were studied, as well as functional properties of the fractions by NMR. Finally the temperature-jump method was used for assaying the oxygen binding of the dissociating molecule and of preparations of isolated subunits. Nevertheless very little is known about the structure of the intact molecule. Schutter et al. suggested that the molecule possibly consists of two halves, combined in a staggered way, the halves themselves consisting of four subunits arranged in a square.

SPATIAL AND TEMPORAL PATTERNS OF GROUNDWATER ELEVATION AND SALINITY ON ASSATEAGUE ISLAND

2016 ◽  
Author(s):  
Ruth Coffey ◽  
◽  
Hannah Sprinkle ◽  
Eric Sherry ◽  
Brian Sturgis ◽  
...  
Keyword(s):  
Temporal Patterns ◽  
Spatial And Temporal Patterns ◽  
Assateague Island

LEVERAGING MACHINE LEARNING TO INFORM SPATIAL AND TEMPORAL PATTERNS IN DEEP-SEA CORAL BIODIVERSITY, GULF OF MEXICO AND US WEST ATLANTIC

2019 ◽  
Author(s):  
Alexander N. Zimmerman ◽  
◽  
Claudia C. Johnson ◽  
Nicholas W. Bussberg ◽  
Mehmet M. Dalkilic
Keyword(s):  
Machine Learning ◽  
Gulf Of Mexico ◽  
Deep Sea ◽  
Temporal Patterns ◽  
Spatial And Temporal Patterns ◽  
Us West
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