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• 研究报告 • 上一篇    下一篇

农业景观中两栖类生物分布与环境因素的关系

张丽1,2,梁国付1,2*,郭豪杰1,2,李成蹊1,2,孙博琳1,2,丁圣彦1,2#br#   

  1. 1教育部黄河中下游数字地理技术重点实验室, 河南开封 475004; 2河南大学环境与规划学院,  河南开封 475004)
  • 出版日期:2016-11-10 发布日期:2016-11-10

Relationships between amphibian distribution and environmental factors in agricultural landscape.

ZHANG Li1,2, LIANG Guo-fu1,2*, GUO Hao-jie1,2, LI Cheng-xi1,2, SUN Bo-lin1,2, DING Sheng-yan1,2#br#   

  1. (1Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Kaifeng 475004, Henan, China;2College of Environment and Planning, Henan University, Kaifeng 475004, Henan, China).
  • Online:2016-11-10 Published:2016-11-10

摘要:

以黄河下游地区封丘县为研究区域,对池塘中分布的两栖类生物进行调查,利用CANOCO软件里的冗余分析模型,分析了在250、500、1000和2000 m扩散能力下,两栖类生物多度和栖息地特征变量(化学需氧量、氨氮、总磷、pH值、植被盖度、两栖类幼体捕食者)以及景观变量(池塘数量、林地面积、Shannon多样性指数、Simpson多样性指数、至道路的最近距离、蔓延度指数、景观分化指数、聚集度指数)之间的关系。结果表明:在栖息地水平上,pH值、化学需氧量、植被盖度和两栖类幼体捕食者是影响两栖类生物的重要影响因素;在景观水平上,不同扩散能力下,至道路的最近距离对两栖类生物有显著影响;在物种扩散能力较低时(250和500 m)景观组成多样性也是重要影响因素,随着物种扩散能力的增强,两栖类生物分布与池塘数量和景观聚集度指数关系显著;农业景观中两栖类生物保护要从栖息地水平上和景观水平上进行综合考虑。
 

关键词: 耦合工艺, 微生物降解, 藻毒素, 天然有机物

Abstract:

Taking a typical plain agricultural landscape in Fengqiu County, Henan Province as the study area, the relationships of the abundance of amphibians and their single adult species with environmental conditions at both habitat and landscape scales with four dispersal abilities (250, 500, 1000 and 2000 m) were explored with the support of redundancy analysis (RDA). The explanatory variables were separated into three categories: habitat characteristics variables \[chemical oxygen demand (COD), NH3--N, total phosphorus (TP), pH, vegetation coverage (VEG), benthic fauna predators (PRE)\], landscape composition variables \[number of ponds (NP), total area of woodland (AW), Shannon’s diversity index (SHDI), Simpson’s diversity index (SIDI)\] and landscape configuration variables \[distance to other nearest road (DR), contagion index (CONTAG), landscape division index (DIVISION), aggregation index (AI)\]. The results showed that, at habitat scale, pH, COD, VEG and PRE had significant influences on amphibian distribution. At landscape level, DR was always the significant explanatory variable at different dispersal abilities. When the dispersal abilities were 250 m and 500 m, landscape composition was the most critical factor. With the increase of dispersal ability, the effects of DR and AI were more obvious. Therefore, with regard to the protection of amphibian species and their habitats in plain agricultural region, both habitat and landscape scales should be taken into full consideration.
 

Key words: microbial degradation, cyanobacterial toxin, natural organic matter., coupling process