Response ofCarex cinerascenspopulations to groundwater level gradients in the Poyang Lake wetland

2016 ◽  
Vol 36 (16) ◽  
Author(s):  
冯文娟 FENG Wenjuan ◽  
徐力刚 XU Ligang ◽  
王晓龙 WANG Xiaolong ◽  
李海英 LI Haiying ◽  
姜加虎 JIANG Jiahu
Keyword(s):  
Groundwater Level ◽  
Poyang Lake ◽  
Poyang Lake Wetland

Assessing ecological health of Poyang Lake wetland, using benthic macroinvertebrate-based index of biotic integrity (B-IBI)

2019 ◽  
Vol 39 (18) ◽  
Author(s):  
游清徽 YOU Qinghui ◽  
刘玲玲 LIU Lingling ◽  
方娜 FANG Na ◽  
阳文静 YANG Wenjing ◽  
张华 ZHANG Hua ◽  
...  
Keyword(s):  
Poyang Lake ◽  
Index Of Biotic Integrity ◽  
Biotic Integrity ◽  
Benthic Macroinvertebrate ◽  
Ecological Health ◽  
Poyang Lake Wetland

scholarly journals Evidences of hydraulic relationships between groundwater and lake water across the large floodplain wetland of Poyang Lake, China

2017 ◽  
Vol 18 (2) ◽  
pp. 698-712 ◽  
Author(s):  
Yunliang Li ◽  
Jing Yao ◽  
Guizhang Zhao ◽  
Qi Zhang
Keyword(s):  
Water Level ◽  
Lake Water ◽  
Poyang Lake ◽  
Spatial And Temporal Variability ◽  
Floodplain Wetland ◽  
Lake Water Level ◽  
Groundwater Dynamics ◽  
Isotope Evidence ◽  
To Receive ◽  
Poyang Lake Wetland

Abstract Hydraulic relationship between wetlands and lakes has become an important topic for the scientific and decision-making communities. Poyang Lake, an open freshwater lake in China, and the extensive floodplain wetland surrounding the lake, plays an important role in protecting the biodiversity of this internationally recognized wetland system. This paper is the first field-based study into an investigation of the groundwater dynamics in the floodplain wetland and the associated hydraulic relationship with the lake using hydrological, hydrochemical and stable isotope evidence, as exemplified by Poyang Lake wetland. Results show that groundwater stores within the floodplain wetland exhibit spatial and temporal variability in terms of the magnitudes of groundwater level variations. Floodplain groundwater fluctuations largely reflect patterns of the precipitation and the lake water level; however, the groundwater dynamics are highly affected by the variations in the lake water level, rather than local precipitation. Floodplain wetland is most likely to receive the lake water during spring and summer and may recharge the lake during periods of low lake water level. Additionally, floodplain groundwater displays similar hydrochemical and environmental isotope signatures to that of the lake at different sampling periods, indicating a close hydraulic relationship between groundwater and the lake throughout the year.

scholarly journals Vegetation Carbon Sequestration Mapping in Herbaceous Wetlands by Using a MODIS EVI Time-Series Data Set: A Case in Poyang Lake Wetland, China

2020 ◽  
Vol 12 (18) ◽  
pp. 3000
Author(s):  
Xue Dai ◽  
Guishan Yang ◽  
Desheng Liu ◽  
Rongrong Wan
Keyword(s):  
Time Series ◽  
Carbon Sequestration ◽  
Vegetation Index ◽  
Time Series Data ◽  
Poyang Lake ◽  
Carbon Stocks ◽  
Series Data ◽  
Biomass Carbon ◽  
Vegetation Carbon ◽  
Poyang Lake Wetland

The carbon sequestration capacity of wetland vegetation determines carbon stocks and changes in wetlands. However, modeling vegetation carbon sequestration of herbaceous wetlands is still problematic due to complex hydroecological processes and rapidly changing biomass carbon stocks. Theoretically, a vegetation index (VI) time series can retrieve the dynamic of biomass carbon stocks and could be used to calculate the cumulative composite of biomass carbon stocks during a given interval, i.e., vegetation carbon sequestration. Hence, we explored the potential for mapping vegetation carbon sequestration in herbaceous wetlands in this study by using a combination of remotely sensed VI time series and field observation data. This method was exemplarily applied for Poyang Lake wetland in 2016 by using a 16-day Moderate Resolution Imaging Spectroradiometer (MODIS) enhanced vegetation index (EVI) time series. Results show that the vegetation carbon sequestration in this area was in the range of 193–1221 g C m−2 year−1 with a mean of 401 g C m−2 year−1 and a standard deviation of 172 g C m−2 year−1 in 2016. The approach has wider spatial applicability in wetlands than the currently used global map of vegetation production (MOD17A3) because our carbon estimation in areas depicted by ‘no data’ in the MOD17A3 product is considerable, which accounts for 91.2–91.5% of the total vegetation carbon sequestration of the wetland. Thus, we determined that VI time series data shows great potential for estimating vegetation carbon sequestration in herbaceous wetlands, especially with the continuously improving quality and frequency of satellite VI images.

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