Species composition and temporal pattern of fish passing through the navigation locks in the middle reach of Yangtze River: implications for fish conservation

2013 ◽  
Vol 29 (6) ◽  
pp. 1441-1444 ◽  
Author(s):  
P.-C. Lin ◽  
S. Brosse ◽  
X. Gao ◽  
C.-C. Liu ◽  
H.-Z. Liu
Keyword(s):  
Species Composition ◽  
Temporal Pattern ◽  
Yangtze River ◽  
Middle Reach ◽  
Fish Conservation

scholarly journals Are river protected areas sufficient for fish conservation? Implications from large-scale hydroacoustic surveys in the middle reach of the Yangtze River

BMC Ecology ◽  
2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Xiao Xie ◽  
Hui Zhang ◽  
Chengyou Wang ◽  
Jinming Wu ◽  
Qiwei Wei ◽  
...  
Keyword(s):  
Protected Areas ◽  
Yangtze River ◽  
Anthropogenic Impacts ◽  
Nature Reserves ◽  
The Yangtze River ◽  
Middle Reach ◽  
Fish Conservation ◽  
Germplasm Resource ◽  
Significant Difference ◽  
Mature Fish

Abstract Background The Yangtze River is the third largest river in the world and suffers from extensive anthropogenic impacts. The fishes in the Yangtze River are essential for the sustainable development of freshwater fisheries and the conservation of aquatic biodiversity in China. However, the fishery resources in the Yangtze River Basin have shown rapid decline due to various human activities. In recent years, nature reserves and germplasm resource reserves have become important means to protect fishes in the Yangtze River. However, nature reserves and germplasm resource reserves that regard freshwater fishes as the main object of protection are not common and have been rarely studied in China. In this paper, a hydroacoustic method and systematic conservation planning tool (Marxan) were combined to evaluate the effectiveness of reserves based on the spatial and temporal patterns of mature fishes in the middle reach of the Yangtze River (MRYR) from 2010 to 2017. Results The hydroacoustic survey results indicated that in the longitudinal direction, low densities of mature fish species were observed in the Jingzhou (S2) and Jianli (S4, S5, S6) sections, whereas high densities of fish were observed in other sections, such as the Yichang (S1), Chenglingji to Huangsangkou (S7–S12), and Hukou (S15) sections. Among the regions preferred by fish, S7, S10 and S12 were non-reserves. No significant difference in mature fish density was observed between the non-reserves and nature reserves, and a similar result was obtained between the non-reserves and germplasm resource reserves. In Marxan, the optimal conservation sites selected for habitat restoration, such as the Chenglingji, Dengjiakou, Zhuankou, Hankou, Yangluo, and Huangsangkou sections, which are located in non-reserves, were identified in the MRYR. Conclusions The Chenglingji, Dengjiakou, Zhuankou, Hankou, Yangluo, and Huangsangkou sections, which are located in non-reserves, play equally important roles in the conservation of fish populations in the MRYR. Our results indicated that further optimization is urgently needed for the currently protected areas in this region. These areas should be designated as reserves, and classification protection mechanisms should be adopted to strengthen the effectiveness of fish conservation in the MRYR.

Climate history of the middle reach of the Yangtze river over the past 9000 years: A speleothem isotopic record from Za cave, Hubei, China

2001 ◽  
Vol 44 (S1) ◽  
pp. 119-122 ◽  
Author(s):  
Chaoyong Hu ◽  
Junhua Huang ◽  
Guanqing Yang ◽  
Xiulun Lin ◽  
Nianqiao Fang
Keyword(s):  
Yangtze River ◽  
The Yangtze River ◽  
Middle Reach ◽  
Climate History ◽  
The Past ◽  
History Of

Monitoring of Drought Change in the Middle Reach of Yangtze River

2018 ◽  
Author(s):  
Pingchuan Zhang ◽  
Na Wang ◽  
Zezhong Zheng ◽  
Jun Xia ◽  
Liping Zhang ◽  
...  
Keyword(s):  
Yangtze River ◽  
Middle Reach

Vegetation history and dynamics in the middle reach of the Yangtze River during the last 1500 years revealed by sedimentary records from Taibai Lake, China

The Holocene ◽  
2012 ◽  
Vol 23 (1) ◽  
pp. 57-67 ◽  
Author(s):  
Xiayun Xiao ◽  
Xiangdong Yang ◽  
Ji Shen ◽  
Sumin Wang ◽  
Bin Xue ◽  
...  
Keyword(s):  
Human Activities ◽  
Yangtze River ◽  
Detrended Correspondence Analysis ◽  
Transitional Period ◽  
Vegetation Changes ◽  
The Yangtze River ◽  
Mixed Conifer ◽  
Middle Reach ◽  
Evergreen Broadleaved Forest ◽  
Pollen Types

Pollen and charcoal records of a 150 cm long lake sediment core from Taibai Lake in the middle reach of the Yangtze River reveal seven major changes in regional vegetation over the last 1500 years. During the period c. ad 480–710, evergreen broadleaved forest dominated by Castanopsis/Lithocarpus and evergreen oaks occurred in the Taibai Lake catchment. From c. ad 710 to 1050, the vegetation shifted to a mixed conifer and broadleaved forest, with Pinus expanding at the expense of Castanopsis/Lithocarpus. Between c. ad 1050 and 1320, evergreen broadleaved forest reoccupied the studied area. From c. ad 1320 to 1650, the area of primary forest decreased markedly with synchronous reduction in broadleaved trees and Pinus. Between c. ad 1650 and 1740, the biomass declined rapidly, while secondary Pinus forest began to expand. During c. ad 1740–1950, forest extent increased slightly compared with the previous stage, but the landscape was still secondary forest with the minimum proportion of broadleaved trees. After c. ad 1950, the biomass in the surrounding area was very low, with vegetation types similar to that at present (secondary Pinus forest and mixed conifer and broadleaved forest). A detrended correspondence analysis (DCA) with 125 samples and 34 main pollen types is used to separate human and climatic impacts on vegetation. Then, the pollen assemblage, DCA, charcoal record, and magnetic susceptibility are combined to discuss the key factors inducing these vegetation changes. The vegetation changes were mainly controlled by the climatic changes, with the weak impacts of human activities before c. ad 1320. Since then, the intensity of human influences on vegetation increased gradually, entering a transitional period of main controlling factors of vegetation changes from nature to human activities. After c. ad 1740, the vegetation changes were chiefly controlled by human activities, and the climatic signal was weak.

Sign in / Sign up

Export Citation Format

Share Document