Biodiversity Science ›› 2005, Vol. 13 ›› Issue (5): 407-415.doi: 10.1360/biodiv.050019

Special Issue: Exploring the Mechamism of Species Endangerment and Conservation Strategy in the Rangtze River Drainage

• Special Issue • Previous Article     Next Article

Impact of river-lake isolation on the spatial distribution pattern of Hemisalanx brachyrostralis

Zhongsuo Wang 1, 2, Cai Lu 1, Chongren Xu 1*, Guangchun Lei 1*   

  1. 1College of Life Sciences, Peking University, Beijing 100871
    2College of Life Sciences, Capital Normal University, Beijing 100037
  • Received:2005-01-17 Revised:2005-08-28 Online:2005-09-20
  • Chongren Xu Guangchun Lei

During 2001-2003, we conducted a survey on icefish resources in the Yangtze River basin, aiming to find out the impacts of habitat fragmentation on the population structure and dynamics of the species Hemisalanx brachyrostralis. By investigating the presence/absence of the target species in 86 water bodies, we analysed its temporal-spatial distribution patterns in relation to two important habitat parameters—water area and isolation. The results indicated that this species was mainly distributed in lakes affiliated with the mid-lower reaches of the Yangtze River, showing low incidence of occurrence (IO=21.3%, annual mean), frequent change in spatial pattern, and unstable population structure from year to year. Further analysis showed that both the IO and population stability of this species related positively to the water area index but negatively to the isolation index of the lakes studied. Binary logistic regression elucidated the presence/absence structure of H. brachyrostralis in the three years, showing presence of the species was positively related to water area index with high significance and negatively related to isolation index with significance. We conclude that the process of river-lake fragmentation, which results in the decrease of water area and increase of lake isolation, has major impacts on the spatial structure and dynamics of H. brachyrostralis along the Yangtze River basin.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] ZHANG Wei-Yun CHEN Hao WANG Shui-Juan TAN Ren-Xiang FEI Xiu-Geng. The Isolation, Purification and Identification of a Kind ofAgar Polysaccharide from Porphyra yezoensis[J]. Chin Bull Bot, 2000, 17(05): 429 -434 .
[2] Xiaojun Xi, Jing Cao, Jinfeng Zhang, Dengrong Zhang. Study on Drought Resistance of Abies concolor[J]. Chin Bull Bot, 2008, 25(06): 722 -727 .
[3] . [J]. Chin Bull Bot, 1994, 11(专辑): 81 .
[4] Cai Ji-jiong. Tissue Conductance Technique of Plant Specimens[J]. Chin Bull Bot, 1988, 5(02): 117 -118 .
[5] . [J]. Chin Bull Bot, 1996, 13(专辑): 55 -57 .
[6] Lin Chun-jian. Polar Auxin Transport[J]. Chin Bull Bot, 1996, 13(04): 1 -5 .
[7] Pu Jin-long;Ji Xiao-duo;He Zhen-xing;Gui Xiao-ming and Chen Xiao-liang. GC-MS Analysis of Essential Oils from some Species of Amomun[J]. Chin Bull Bot, 1984, 2(04): 23 -25 .
[8] . [J]. Chin Bull Bot, 1996, 13(专辑): 82 .
[9] LIANG Yu GAO Yu-Bao. Effects of Endophyte Infection on Growth,Development and Stress Resistance of Plants[J]. Chin Bull Bot, 2000, 17(01): 52 -59 .
[10] Huang Yin-xiao. [J]. Chin Bull Bot, 1983, 1(01): 47 -49 .