Effects of Fish, Water Depth, and Predation Risk on Patch Dynamics in a North-Temperate River Ecosystem

Oikos ◽  
1997 ◽  
Vol 80 (2) ◽  
pp. 382 ◽  
Author(s):  
Frances P. Gelwick ◽  
Marsha S. Stock ◽  
William J. Matthews
Keyword(s):  
Predation Risk ◽  
Water Depth ◽  
Patch Dynamics ◽  
River Ecosystem ◽  
Temperate River

Habitat-specific effects of particle size, current velocity, water depth, and predation risk on size-dependent crayfish distribution

Hydrobiologia ◽  
2013 ◽  
Vol 716 (1) ◽  
pp. 103-114 ◽  
Author(s):  
Jennifer M. Clark ◽  
Mark W. Kershner ◽  
Justin J. Montemarano
Keyword(s):  
Particle Size ◽  
Predation Risk ◽  
Water Depth ◽  
Current Velocity ◽  
Size Dependent ◽  
Specific Effects ◽  
Velocity Water

Water depth modifies relative predation risk for a motile fish taxon in Bahamian tidal creeks

2007 ◽  
Vol 30 (3) ◽  
pp. 518-525 ◽  
Author(s):  
Andrew L. Rypel ◽  
Craig A. Layman ◽  
D. Albrey Arrington
Keyword(s):  
Predation Risk ◽  
Water Depth ◽  
Tidal Creeks ◽  
Fish Taxon

Mercury in the bottom sediments of the lower Vistula river ecosystem, Poland - A role of the anthropogenic factor

2003 ◽  
Vol 107 ◽  
pp. 1381-1384 ◽  
Author(s):  
B. Wyrzykowska ◽  
J. Falandysz
Keyword(s):  
Bottom Sediments ◽  
River Ecosystem ◽  
Anthropogenic Factor ◽  
Vistula River

Evaluation of Discharges by CSOs from Water Depth Measurements: Case Study of a Lateral with a Low and Long Crest

2002 ◽  
Author(s):  
M. Zug ◽  
F. Blanchet ◽  
C. Joannis ◽  
G. Ruban ◽  
F. Cohen-Solal
Keyword(s):  
Water Depth

Elevated nest predation risk promotes offspring size variation in birds with prolonged parental care.

2019 ◽  
Author(s):  
Gretchen F. Wagner ◽  
Emeline Mourocq ◽  
Michael Griesser
Keyword(s):  
Predation Risk ◽  
Reproductive Cycle ◽  
Perceived Risk ◽  
Nest Predation ◽  
Bird Species ◽  
Size Variation ◽  
Egg Laying ◽  
Offspring Size ◽  
Natural Predation ◽  
Risk Spreading

Predation of offspring is the main cause of reproductive failure in many species, and the mere fear of offspring predation shapes reproductive strategies. Yet, natural predation risk is ubiquitously variable and can be unpredictable. Consequently, the perceived prospect of predation early in a reproductive cycle may not reflect the actual risk to ensuing offspring. An increased variance in investment across offspring has been linked to breeding in unpredictable environments in several taxa, but has so far been overlooked as a maternal response to temporal variation in predation risk. Here, we experimentally increased the perceived risk of nest predation prior to egg-laying in seven bird species. Species with prolonged parent-offspring associations increased their intra-brood variation in egg, and subsequently offspring, size. High risk to offspring early in a reproductive cycle can favour a risk-spreading strategy particularly in species with the greatest opportunity to even out offspring quality after fledging.

Predation risk during the early life history periods of fishes: separating the effects of size and age

1994 ◽  
Vol 111 ◽  
pp. 105-114
Author(s):  
DR Bertram ◽  
WC Leggett
Keyword(s):  
Life History ◽  
Predation Risk ◽  
Early Life ◽  
Early Life History

Rice Tolerance to Flooding Stress on Germination Stage and Early Seedling Growth under 5 cm Water Depth

2019 ◽  
Vol 2 (1) ◽  
pp. 40
Author(s):  
Arinal Haq Izzawati Nurrahma ◽  
Ahmad Junaedi ◽  
Heni Purnamawati
Keyword(s):  
Seedling Growth ◽  
Water Depth ◽  
Flooding Stress ◽  
Early Seedling Growth ◽  
Early Seedling ◽  
Germination Stage

Comparison of the performance of oscillating water column devices based on arrangements of water columns

2020 ◽  
Vol 14 (3) ◽  
pp. 7082-7093
Author(s):  
Jahirwan Ut Jasron ◽  
Sudjito Soeparmani ◽  
Lilis Yuliati ◽  
Djarot B. Darmadi
Keyword(s):  
Wave Propagation ◽  
Water Column ◽  
Water Depth ◽  
Graphical Form ◽  
Wave Power ◽  
Oscillating Water Column ◽  
Power Absorption ◽  
Water Columns ◽  
Single Column ◽  
Parallel Arrangement

The hydrodynamic performance of oscillating water column (OWC) depends on the depth of the water, the size of the water column and its arrangement, which affects the oscillation of the water surface in the column. An experimental method was conducted by testing 4 water depths with wave periods of 1-3 s. All data recorded by the sensor is then processed and presented in graphical form. The research focused on analyzing the difference in wave power absorption capabilities of the three geometric types of OWC based on arrangements of water columns. The OWC devices designed as single water column, the double water column in a series arrangement which was perpendicular to the direction of wave propagation, and double water column in which the arrangement of columns was parallel to the direction of wave propagation. This paper discussed several factors affecting the amount of power absorbed by the device. The factors are the ratio of water depth in its relation to wavelength (kh) and the inlet openings ratio (c/h) of the devices. The test results show that if the water depth increases in the range of kh 0.7 to 0.9, then the performance of the double chamber oscillating water column (DCOWC) device is better than the single chamber oscillating water column (SCOWC) device with maximum efficiency for the parallel arrangement 22,4%, series arrangement 20.8% and single column 20.7%. However, when referring to c/h, the maximum energy absorption efficiency for a single column is 27.7%, double column series arrangement is 23.2%, and double column parallel arrangement is 29.5%. Based on the results of the analysis, DCOWC devices in parallel arrangement showed the ability to absorb better wave power in a broader range of wave frequencies. The best wave of power absorption in the three testing models occurred in the wave period T = 1.3 seconds.

A Study of the Average Flow in Open Channel with Baffle Blocks Distributed Uniformly

10.29007/zx1w ◽  
2018 ◽  
Author(s):  
Dung Tien Tran ◽  
Anh Tuan Le ◽  
Hong Nhung Le ◽  
Viet Hung Ho
Keyword(s):  
Water Level ◽  
Water Depth ◽  
Open Channel ◽  
Block Size ◽  
Average Flow ◽  
Modelling Studies ◽  
Baffle Block

A study of average flow in open channel with baffle blocks distributed uniformly has been considered by using channel with varied slopes. In this article, experimental and modelling studies were introduced when the correlation between the water depth and baffle block size is significant. The objective of the work is to give the rudimentary relations between discharge and water level in the channels. When the water depth is large, the effect of bottom channel friction on the flow is relatively small. This paper also gives applications of the software ‘Telemac-2D’ to simulate the flow under different conditions.

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