Response of regeneration diversity of Carex Lasiocarpa community to different water levels in Sanjiang Plain, China

2010 ◽  
Vol 20 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Li Wang ◽  
Changchun Song ◽  
Jinming Hu ◽  
Tao Yang
Keyword(s):  
Sanjiang Plain ◽  
Water Levels ◽  
Carex Lasiocarpa

scholarly journals The Effects of Water Levels and Interspecific Competition on Two Carex Species in a Temperate Wetland of Northeast China

2020 ◽  
Vol 12 (24) ◽  
pp. 10654
Author(s):  
Wenwen Tan ◽  
Li Sun ◽  
Xinhou Zhang ◽  
Changchun Song
Keyword(s):  
Spatial Distribution ◽  
Water Level ◽  
Interspecific Competition ◽  
Distribution Patterns ◽  
Wetland Plants ◽  
Water Levels ◽  
Carex Lasiocarpa ◽  
Temperate Wetland ◽  
The Relationship ◽  
Spatial Distribution Characteristic

Zonation along a water level is the main spatial distribution characteristic of wetland plants. This is mainly because of the influences of hydrological conditions and interspecific competition, which finally narrow the fundamental niche of a species to its realized niche. In the present study, a controlled experiment was conducted in order to analyze the relationship between Carex lasiocarpa/Carex pseudocuraica and Glyceria spiculosa, in conditions of three competitive treatments at four water levels. The results showed that in no competition, C. lasiocarpa preferred low water levels, but this preference receded when competing with G. spiculosa. In contrast, C. pseudocuraica had greater preference for low water level when competing with G. spiculosa. The root/shoot ratios of the two Carex species decreased with increasing water levels, but they were almost unaffected by different competition treatments. With the increase in water level during full competition with G. spiculosa, the competitive ability of C. lasiocarpa showed an increasing trend, whereas a contrary trend was observed in C. pseudocuraica. Our results suggested the effects of water levels and their interactions with interspecific competition varied between the two Carex species and played an important role in determining spatial distribution patterns and potential community succession of wetland plants.

Vegetation and nutrient status of northern Michigan fens

1978 ◽  
Vol 56 (24) ◽  
pp. 3044-3051 ◽  
Author(s):  
Christa R. Schwintzer
Keyword(s):  
Shallow Groundwater ◽  
Nutrient Status ◽  
Water Levels ◽  
Importance Value ◽  
Myrica Gale ◽  
Carex Aquatilis ◽  
Ph Values ◽  
Kettle Hole ◽  
Carex Lasiocarpa ◽  
Northern Michigan

The vegetation, selected characteristics of shallow groundwater, and depth to water were examined in five fens in northern Lower Michigan. The field layer was the dominant stratum in all five fens and contained a total of 85 vascular species with a mean density of 30 vascular species per stand. Carex lasiocarpa was the most prevalent dominant plant and attained a frequency–presence index (FPI) of 8000 of a possible 10 000 and a mean importance value of 33 of a possible 200. Other common dominants in decreasing order of FPI were Carex aquatilis (6640), Myrica gale (4636), and Andromeda glaucophylla (2000). Common subordinates were Hypericum virginicum (2639), Muhlenbergia glomerata (2466), and Campanula aparinoides (1400). The vegetation was relatively homogeneous as indicated by a homogeneity index of 58%.The shallow groundwaters were minerotrophic with pH values ranging from 5.7 to 7.0 and calcium concentrations of 11.0 to 75.0 mg/ℓ. Four of the fens were on floating mats and had relatively stable water levels while the fifth was on a grounded mat and was subject to substantial water level fluctuation.Three previously described alkaline lake-edge kettle-hole 'bog' communities were found to be similar to the fens in species composition and water chemistry.

scholarly journals The Ecological Response ofCarex lasiocarpaCommunity in the Riparian Wetlands to the Environmental Gradient of Water Depth in Sanjiang Plain, Northeast China

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Zhaoqing Luan ◽  
Zhongxin Wang ◽  
Dandan Yan ◽  
Guihua Liu ◽  
Yingying Xu
Keyword(s):  
Water Depth ◽  
Environmental Gradient ◽  
Diversity Index ◽  
Gaussian Model ◽  
Sanjiang Plain ◽  
Average Height ◽  
Riparian Wetlands ◽  
Carex Lasiocarpa ◽  
Classification Tool ◽  
Height Data

The response ofCarex lasiocarpain riparian wetlands in Sanjiang Plain to the environmental gradient of water depth was analyzed by using the Gaussian Model based on the biomass and average height data, and the ecological water-depth amplitude ofCarex lasiocarpawas derived. The results indicated that the optimum ecological water-depth amplitude ofCarex lasiocarpabased on biomass was [13.45 cm, 29.78 cm], while the optimum ecological water-depth amplitude ofCarex lasiocarpabased on average height was [2.31 cm, 40.11 cm]. The intersection of the ecological water-depth amplitudes based on biomass and height confirmed that the optimum ecological water-depth amplitude ofCarex lasiocarpawas [13.45 cm, 29.78 cm] and the optimist growing water-depth ofCarex lasiocarpawas 21.4 cm. The TWINSPAN, a polythetic and divisive classification tool, was used to classify the wetland ecological series into 6 associations. Result of TWINSPAN matrix classification reflected an obvious environmental gradient in these associations: water-depth gradient. The relation of biodiversity ofCarex lasiocarpacommunity and water depth was determined by calculating the diversity index of each association.

Soil C, N and P stoichiometry of Deyeuxia angustifolia and Carex lasiocarpa wetlands in Sanjiang Plain, Northeast China

2012 ◽  
Vol 12 (9) ◽  
pp. 1309-1315 ◽  
Author(s):  
Zhongsheng Zhang ◽  
Xianguo Lu ◽  
Xiaolin Song ◽  
Yue Guo ◽  
Zhenshan Xue
Keyword(s):  
Northeast China ◽  
Sanjiang Plain ◽  
Soil C ◽  
Deyeuxia Angustifolia ◽  
Carex Lasiocarpa

scholarly journals Air Warming and Drainage Influences Soil Microarthropod Communities

2021 ◽  
Vol 9 ◽  
Author(s):  
Hui Zhang ◽  
Xin Sun ◽  
Dong Liu ◽  
Haitao Wu ◽  
Huai Chen
Keyword(s):  
Water Level ◽  
Natural Water ◽  
Synergistic Effects ◽  
Combined Treatment ◽  
Sanjiang Plain ◽  
Water Levels ◽  
Total Density ◽  
Human Beings ◽  
Level Control ◽  
The Sanjiang Plain

The degradation of wetlands due to climate change is of critical concern to human beings worldwide. Little is known about the potential synergistic effects of simultaneous water level reduction and warming on the underground wetland ecosystems. We conducted a 5-month field experiment in the Sanjiang Plain, utilizing open-top chambers and water level automatic control systems to investigate such synergistic effects. Soil springtails (Collembola) and mites (Acari) in the top (0–20 cm) soil layers were sampled to calculate their density, diversity, and to screen for indicator species. Warming significantly influenced soil springtail communities, slightly increasing the total density and total abundance under the natural water level while reducing them under a constant water level. In addition, Anurida maritima and Vertagopus laricis, two indicators for the natural water level, had the highest densities in the natural water level treatment and under the combined treatment of warming and natural water level, respectively. Cheiroseius sinicus and Malaconothrus tardus had the highest densities in warming under the 0 cm water level, significantly higher than the other three treatments. This study also revealed the importance of maintaining fluctuating water levels for microarthropod communities influenced by global warming, providing a theoretical basis for water level control in wetland restoration.

Dewfall Monitoring in Wetland Ecosystem

2013 ◽  
Vol 864-867 ◽  
pp. 883-886
Author(s):  
Ying Ying Xu ◽  
Bai Xing Yan ◽  
Hui Zhu
Keyword(s):  
Relative Humidity ◽  
Water Cycle ◽  
Growing Season ◽  
Sanjiang Plain ◽  
Wetland Ecosystem ◽  
The Sanjiang Plain ◽  
Carex Lasiocarpa ◽  
Important Site

Dew is a crucial factor of water cycle in wetland ecosystem. This study aims to investigate the dewfall in Carex lasiocarpa marsh in the Sanjiang Plain. The experiment was carried out during the growing season from mid-May to mid-October in 2008 and 2009. Dew was monitored by woodsticks. Results indicated that dew intensity in 2008 was lower than it in 2009 obviously because of the much higher relative humidity in 2009. But annual dewfall was almost the same, which reached 8.76 mm and 8.38 mm in 2008 and 2009, respectively. The dew intensity reached the peak in August in both years. The Carex lasiocarpa marsh was the important site for the dew deposit.

Stereological Analyses of Hepatocyte Ultrastructure Monitor Arsenic Liver Burdens

1980 ◽  
Vol 38 ◽  
pp. 442-443
Author(s):  
E. M. B. Sorensen ◽  
R. R. Mitchell ◽  
L. L. Graham
Keyword(s):  
Drainage System ◽  
Water Levels ◽  
Ultrastructural Changes ◽  
Hepatocyte Ultrastructure ◽  
Lepomis Cyanellus ◽  
Large Numbers ◽  
Activation Data ◽  
Water Analyses ◽  
Municipal Lake ◽  
Green Sunfish

Endemic freshwater teleosts were collected from a portion of the Navosota River drainage system which had been inadvertently contaminated with arsenic wastes from a firm manufacturing arsenical pesticides and herbicides. At the time of collection these fish were exposed to a concentration of 13.6 ppm arsenic in the water; levels ranged from 1.0 to 20.0 ppm during the four-month period prior. Scale annuli counts and prior water analyses indicated that these fish had been exposed for a lifetime. Neutron activation data showed that Lepomis cyanellus (green sunfish) had accumulated from 6.1 to 64.2 ppm arsenic in the liver, which is the major detoxification organ in arsenic poisoning. Examination of livers for ultrastructural changes revealed the presence of electron dense bodies and large numbers of autophagic vacuoles (AV) and necrotic bodies (NB) (1), as previously observed in this same species following laboratory exposures to sodium arsenate (2). In addition, abnormal lysosomes (AL), necrotic areas (NA), proliferated rough endoplasmic reticulum (RER), and fibrous bodies (FB) were observed. In order to assess whether the extent of these cellular changes was related to the concentration of arsenic in the liver, stereological measurements of the volume and surface densities of changes were compared with levels of arsenic in the livers of fish from both Municipal Lake and an area known to contain no detectable level of arsenic.

AUTOMATIC WATER LEVEL MONITORING WITH IOT AND LPWAN

2019 ◽  
pp. 95-103
Author(s):  
Krum Videnov ◽  
Vanya Stoykova
Keyword(s):  
Water Level ◽  
Real Time ◽  
Early Warning ◽  
Water Sources ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Level Monitoring ◽  
Water Level Monitoring

Monitoring water levels of lakes, streams, rivers and other water basins is of essential importance and is a popular measurement for a number of different industries and organisations. Remote water level monitoring helps to provide an early warning feature by sending advance alerts when the water level is increased (reaches a certain threshold). The purpose of this report is to present an affordable solution for measuring water levels in water sources using IoT and LPWAN. The assembled system enables recording of water level fluctuations in real time and storing the collected data on a remote database through LoRaWAN for further processing and analysis.

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