Article
Biodiversity Conservation
Qiang Guan, Haitao Wu, Lei Xu, Yujuan Kang, Kangle Lu, Dandan Liu, Dandan Han, Zhenshan Xue, Yuxiang Yuan, Wenfeng Wang, Zhongsheng Zhang
Summary: The effects of longitudinal connectivity on the diversity of freshwater snails in river floodplain wetlands are well understood, but the effects of lateral connectivity are less evaluated. This study assessed the impact of lateral and longitudinal connectivity on multiple facets of snail diversity in floodplain wetlands in the Da Xing'an Mountains of Northeast China. The results showed significant effects of the gradients of lateral and longitudinal connectivity on the taxonomic, functional, and phylogenetic structures of snail assemblages. Water and climate variables played important roles in explaining the variations in snail diversity.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Aiping Huang, Xiaobo Liu, Wenqi Peng, Fei Dong, Zhen Han, Fei Du, Bing Ma, Weijie Wang
Summary: This study analyzed the impact of inundation patterns on wetland vegetation distribution and succession in China's largest freshwater lake Poyang Lake. The results revealed that inundation patterns significantly affected the distribution and succession of wetland vegetation, which varied due to climate change and human activities. The proposed water conservancy hub may lead to changes in the inundation patterns and wetland vegetation in the future.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Ecology
Fei Du, Shiyan Wang, Zhen Han, Xiaobo Liu, Chang Liu, Aiping Huang, Kaiqi Chen, Shilin Zhao, Liang Wang, Zhi Jiang
Summary: This study analyzed the impact of hydrological processes on the wetland landscape and migratory bird habitats in Poyang Lake. It identified the critical factors affecting grassland area and optimal water levels for maintaining bird habitats. Additionally, it proposed the optimal inundation period for different plant communities using ecological thresholds.
Article
Environmental Sciences
Toshikazu Kizuka, Hidetoshi Mikami, Satoshi Kameyama, Satoru Ono, Hiroaki Suzuki
Summary: Re-wetting of agricultural areas reclaimed by draining peatlands may lead to nutrient leaching and downstream nutrient loads. This study assessed the risks of nutrient loading in naturally re-wetted agricultural areas in floodplain fens in northern Japan. The results showed that flooding increased the water flow and nutrient influx and outflux, with dissolved organic nitrogen and phosphorus being the main contributors to downstream nutrient loading.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Cristhiana Ropke, Tiago H. S. Pires, Nagila Zuchi, Jansen Zuanon, Sidineia Amadio
Summary: Abnormal hydroclimatic events in the Amazon have been found to impact fish reproduction and demographic parameters, leading to a decrease in the proportion of mature females and a reduction in the average body size of ripe females. These effects are observed in both fished and non-fished species, highlighting the need for conservation policies to address the impact of droughts and fishing pressure.
JOURNAL OF APPLIED ECOLOGY
(2022)
Article
Engineering, Civil
Juan Wu, Qi Zhang, Yunliang Li, Chong-Yu Xu, Xuchun Ye
Summary: This study investigates the stage-area hysteretic relationship in large heterogeneous lake-floodplain systems using the Poyang Lake as an example. By utilizing multi-source remote sensing data and observed water levels, the Enhanced Spatial and Temporal Adaptive Reflection Fusion Model (ESTARFM) is adopted. The results show significant inconsistency in inundation dynamics between the main lake and seasonal floodplain lakes. Furthermore, it is found that seasonal lakes in floodplain settings have a crucial impact on the hysteresis of upstream and downstream stations. This study provides valuable insights into the complexity of hydrological behavior in large heterogeneous lake-floodplain systems, which is important for lake water resources and ecological management.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Zhaoxi Li, Yang Gao, Shuoyue Wang, Ke Zhang, Qi Lin, Junjie Jia, Yao Lu
Summary: This study investigates the phytoplankton community structure, chlorophyll distribution, and associated environmental factors in Poyang Lake, China, throughout a hydrological cycle. The results show a loss in sediment pigment information in the main lake and water channel due to strong hydrodynamic conditions. Sub-lakes sediment pigments accurately reflect phytoplankton community structure and can be considered as preferred lake zones for proxy indexes.
JOURNAL OF HYDROLOGY
(2022)
Article
Biodiversity Conservation
Yang Liu, Li Lin, Haixin Zhang, Guifang Zhang, Zijun Wu, Yanping Zhang, Bin Kang
Summary: By analyzing seasonal fish data from the Poyang Lake, it was found that fish metacommunity displayed quasi-structures, with different paradigm characteristics in different seasons. The diversity and community structure of fish were influenced by environmental and spatial factors to varying degrees in different seasons. Additionally, the change in hydrological conditions caused seasonal shifts in metacommunity dynamics.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Wenqin Huang, Tengfei Hu, Jingqiao Mao, Carsten Montzka, Roland Bol, Songxian Wan, Jianxin Li, Jin Yue, Huichao Dai
Summary: This study quantitatively analyzed the relationship between wetland plant communities and hydrological conditions in Poyang Lake, revealing significant interspecific differences in terms of adaptability to inundation. The integrated framework developed can contribute to better maintaining the wetland plant community structure in the area.
Article
Geosciences, Multidisciplinary
Mingzheng Li, Chang Liu, Fei Liu, Jianwei Wang, Huanzhang Liu
Summary: This study evaluates the long-term dynamics of fishery yields in Poyang Lake and its relationship to hydrological variability. The results show that changes in water levels have a significant impact on fishery yields, which have been decreasing over the past few decades. This study is important for the conservation of fish resources and lake ecosystems.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Environmental Sciences
Pierre Marle, Jeremie Riquier, Pablo Timoner, Helene Mayor, Vera Slaveykova, Emmanuel Castella
Summary: The study indicates that reconnection of floodplain channels with the main river leads to a direct increase in invertebrate richness, but isolation over time causes a continuous decrease in taxonomical richness.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Isabela Freitas Oliveira, Fabricio Beggiato Baccaro, Fernanda P. P. Werneck, Torbjorn Haugaasen
Summary: The seasonal flood pulse in Amazonia plays a crucial role in structuring community diversity in floodplain environments. This study examined the impact of seasonal flooding on fruit-feeding butterfly assemblages in different forest types and strata. The results showed that butterfly abundance decreased during the high-water season, especially in várzea forests, but species richness remained similar between seasons in all forest types. The flood pulse only affected butterfly assemblages in várzea forests, highlighting the idiosyncratic responses of butterfly communities to flooding in different forest types.
ECOLOGY AND EVOLUTION
(2023)
Article
Environmental Sciences
Alba Arenas-Sanchez, Sylvain Doledec, Marco Vighi, Andreu Rico
Summary: Seasonal hydrological variations and chemical pollution are the main drivers of freshwater biodiversity change in Mediterranean rivers. Low flow conditions can intensify the effects of chemical pollution on macroinvertebrate communities. Sites with agricultural and urban pollution have lower taxonomic and functional richness, particularly during low flow periods, while functional diversity is significantly lower in sites with seasonal flow variations. Traits such as large size, asexual reproduction, aquatic passive dispersion, and cocoon production increased in response to pollution during low flow periods. Further studies and monitoring campaigns are recommended to assess the effects of chemical pollution during low flow periods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Civil
Zhaoxi Li, Yang Gao, Shuoyue Wang, Junjie Jia, Xianrui Ha, Yao Lu
Summary: This study reconstructed the long-term succession of phytoplankton community in Poyang Lake and revealed the potential mechanisms of lacustrine ecosystem response to climate-nutrition-hydrology factors. Results showed rapid growth of algal community in Poyang Lake, with increases in diatoms and cryptophytes, and decrease in green algae. The point of change in algal community succession occurred after 1965, representing a delayed response compared to lakes worldwide, due to the unique hydrological fluctuations and anthropogenic disturbances.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Peng Zheng, Xiaoming Jiang, Fengyue Shu, Zhengfei Li, Sijing Zhang, Janne Alahuhta, Jani Heino
Summary: This study evaluated the responses of multiple facets (taxonomic, functional, and phylogenetic) of freshwater molluscs to the loss of lateral hydrological connectivity in floodplain lakes in the Yangtze River Basin. The results showed that functional diversity was significantly higher in connected lakes compared to disconnected lakes, indicating a high level of functional diversity loss without replacement. Lake area, hydrological connectivity, aquatic vegetation coverage, and nutrient levels played important roles in shaping molluscan alpha and beta diversities.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biodiversity Conservation
Evance Omondi Mbao, Jin Gao, Yu Wang, Lewis Sitoki, Yangdong Pan, Beixin Wang
ECOLOGICAL INDICATORS
(2020)
Article
Biodiversity Conservation
Yu Wang, Kai Chen, Jin Gao, Meng Wang, Jie Dong, Yuwei Xie, John P. Giesy, Xiaowei Jin, Beixin Wang
Summary: Through comparing ES-eDNA and WS-eDNA metabarcoding techniques in determining freshwater biodiversity and recovering damaged communities, it was found that ES-eDNA metabarcoding performs better in detecting local biodiversity and is consistent with morphological results, while WS-eDNA is more suitable for exploring biodiversity patterns on a broader scale.
DIVERSITY AND DISTRIBUTIONS
(2021)
Article
Environmental Sciences
Beryl Ochieng, Evance Omondi Mbao, Zhen Zhang, Liandong Shi, Qigen Liu
Summary: This study investigated the seasonal variation in phytoplankton community structure within Tang-Pu Reservoir in relation to physicochemical and hydrological characteristics. The results showed that the abundance and biomass of phytoplankton gradually increased over the three study seasons, with the peak in spring. The phytoplankton community comprised of 7 phyla, 80 genera, and 210 species, with dominant phyla being Chlorophyta, Bacillariophyta, and Cyanophyta. The density and biomass of phytoplankton varied among sampling sites and seasons, with higher values observed in spring. pH, total nitrogen, total phosphorus, transparency, chlorophyll a, dissolve oxygen, and water temperature were identified as important factors influencing the community structure of phytoplankton. Additionally, a decreasing trend in phytoplankton abundance from the river area (inlet) to the lake (outlet) was observed.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Environmental Sciences
Evance Omondi Mbao, Emmanuel Stephen Odinga, Joan Nyika, Beryl Ochieng, Nzula Kitaka
Summary: This article summarizes the topics in diatoms for water quality evaluation and analyzes the trends in diatoms bioassessment in Africa. The study finds that South Africa is more developed in diatoms research compared to other African countries, which is of great significance for the future development of water quality monitoring framework in Africa.
Article
Environmental Sciences
Chunyan Qin, Yifei Ge, Jin Gao, Shengli Zhou, Jian Yu, Beixin Wang, Thibault Datry
Summary: Identifying ecological drivers and understanding their effects on metacommunity and beta diversity are crucial for bioassessment and river management. This study explored the impacts of anthropogenic influences on macroinvertebrate communities in the Yangtze River Delta, China, and found that both species sorting and dispersal shaped the communities, with their importance varying with the levels of anthropogenic impacts. Environmental variables and spatial processes should be considered for effective ecosystem management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Emmanuel Stephen Odinga, Xian Zhou, Evance Omondi Mbao, Qurban Ali, Michael Gatheru Waigi, Margaret L. Shiraku, Wanting Ling
Summary: This study conducted a comprehensive bibliometric analysis of research on steroidal estrogens (SEs) in the past two decades. It revealed that SEs are widespread in surface waters and natural SEs are the most studied, while research on SEs in soils, groundwater, and sediments is limited. The findings provide valuable insights for future monitoring, management, and risk assessment.
Article
Ecology
Jin Gao, Zhiqi Peng, Haoming Zang, Yinchang Wang, Ning Ding, Siwen He, Thibault Datry, Beixin Wang
Summary: Land-use change, particularly urbanisation, has led to a significant decline in both species and functional diversity worldwide. However, the mechanism behind the impact of species loss on functional diversity remains unclear. This study aims to elucidate this mechanism by examining the association between species sensitivity and functional uniqueness, as well as their related functional traits. The findings suggest that urbanisation has a remarkable effect on the taxonomic and functional diversity of macroinvertebrates, and the decline in functional diversity is influenced by the sensitivity and functional uniqueness of species.
FRESHWATER BIOLOGY
(2023)
Article
Marine & Freshwater Biology
Margaret Waturu, Lewis Sitoki, Joseph Lalah, Stanley Chasia, Evance Mbao
Summary: The present study investigated the impact of land use/land cover changes on the spatial-temporal distribution of water quality in the Upper Athi River Catchment. The findings indicate that significant land cover degradation is expected to occur in the catchment if mitigation activities are not undertaken, posing a great threat to biodiversity conservation and the survival of local communities and urban dwellers in Athi River town.
AFRICAN JOURNAL OF AQUATIC SCIENCE
(2023)
