scholarly journals Sex-specific plasticity of reproductive allocation in response to water depth in a clonal, dioecious macrophyte

2019 ◽  
Vol 106 (1) ◽  
pp. 42-50 ◽  
Author(s):  
Lei Li ◽  
Spencer C. H. Barrett ◽  
Zhiping Song ◽  
Jiakuan Chen
Keyword(s):  
Water Depth ◽  
Reproductive Allocation ◽  
Response To Water

scholarly journals Water depth affects reproductive allocation and reproductive allometry in the submerged macrophyte Vallisneria natans

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Lei Li ◽  
Stephen P. Bonser ◽  
Zhichun Lan ◽  
Ligang Xu ◽  
Jiakuan Chen ◽  
...  
Keyword(s):  
Water Depth ◽  
Reproductive Allocation ◽  
Submerged Macrophyte ◽  
Vallisneria Natans

Effect of water depth on population parameters of a Typha glauca stand

1992 ◽  
Vol 70 (2) ◽  
pp. 349-351 ◽  
Author(s):  
I. Waters ◽  
J. M. Shay
Keyword(s):  
Water Depth ◽  
Shoot Density ◽  
Depth Range ◽  
Population Parameters ◽  
Shoot Height ◽  
Frequency Distributions ◽  
Shoot Size ◽  
Shoot Mass ◽  
Response To Water ◽  
Typha Glauca

The response of a Typha glauca stand to a water depth gradient was studied in a small marsh pond in Delta Marsh, Manitoba. Weekly density counts and height measurements were made from May to October 1986 in permanent quadrats at five depths from 25 to 100 cm. Shoot mass was estimated from shoot height using a regression model based on destructive analyses. Shoot density declined significantly from 41 shoots/m2 at 25 cm to 12 shoots/m2 at 85 cm but increased at 100 cm to 38 shoots/m2. Shoot mass increased in shoots growing at water depths from 25 to 65 cm, resulting in relatively constant stand biomass over this depth range. Stand biomass declined at 85 cm and reached its maximum (1789.8 g/m2) at 100 cm. Frequency distributions of shoot size categories based on height deviated from normality and were negatively skewed at all depths, with the greatest skewness occurring at 100 cm. These population parameters were interpreted as evidence of a plastic population response to water depth. Key words: clonal macrophyte, frequency distributions, plasticity, shoot density, Typha glauca, water depth.

Phenotypic plasticity in Phragmites australis as a functional response to water depth

2001 ◽  
Vol 69 (2-4) ◽  
pp. 127-145 ◽  
Author(s):  
Viveka Vretare ◽  
Stefan E.B Weisner ◽  
John A Strand ◽  
Wilhelm Granéli
Keyword(s):  
Phenotypic Plasticity ◽  
Functional Response ◽  
Phragmites Australis ◽  
Water Depth ◽  
Response To Water

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.

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