...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Limnology >Determining suitable submerged macrophyte biomass in terms of dissolved oxygen concentration and biodiversity in the South Basin of Lake Biwa, Japan
【24h】

Determining suitable submerged macrophyte biomass in terms of dissolved oxygen concentration and biodiversity in the South Basin of Lake Biwa, Japan

机译：在日本湖博河南部盆地的溶解氧浓度和生物多样性中确定合适的浸没式宏观物质生物量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

After a regime shift in eutrophic lakes from a turbid water state with phytoplankton blooms to a clear water state, troublesome issues caused by excessive growths of aquatic plants occurred. This study investigated the relationships between submerged macrophyte biomass, and associated fauna and flora, and environmental factors at 52 stations in the South Basin of Lake Biwa. Polynomial regression analysis gave 5 significant regression equations (P0.05, n=52) of submerged macrophyte biomass versus depth, periphyton biomass, and periphyton, epifauna and epi-shellfish taxa richness. We added one equation (P0.1, n=52), which was not significant, but was important for complying with the environmental quality standard for submerged macrophyte biomass versus bottom dissolved oxygen(DO) in Japan. Eleven significant regression equations of percentage volume submerged macrophyte infestation(PVI) versus depth, bottom DO, east-west and north-south averaged from surface to bottom current velocities absolute value, total chlorophyll a (chl.a) and chl.a of green and blue-green algae, epifauna biomass, submerged macrophyte species richness, periphyton and epifauna taxa richness (P0.05, n=52) were also generated. When submerged macrophyte biomass was6000gm(-2) or PVI was60%, DO concentrations became too low for the survival of fish and invertebrates (4.3mg l(-1)). In addition, the cubic regressions of periphyton and epifauna taxa richness showed inflection points were at 3000gm(-2) of submerged macrophyte biomass. Epifaunal biomass, submerged macrophyte species richness, periphyton and epifaunal taxa richness showed inflection points at 30% PVI. Previous studies suggested that regime shifts occur at particular thresholds, and community structure and biodiversity change significantly. Therefore, we assumed regression inflection points were threshold indicators. We recommend an appropriate submerged macrophyte biomass of 3000-6000gm(-2) or a PVI of 30-60% to mai
机译：在用浮游生物繁殖的富养殖湖泊中的富营养化湖泊中的政权转变为清澈的水状态，发生了过度生长的水生植物造成的麻烦问题。本研究调查了潜水细胞生物质和相关的动物群和植物区系之间的关系，以及52个湖南河河河河河南部的52站的环境因素。多项式回归分析得到5个显着的回归方程（P <0.05，n = 52）浸没式宏观物质生物量与深度，植物高水中生物量，艾菲顿，EPIFAUNA和EPI-贝壳类的丰富性。我们添加了一个等式（P <0.1，n = 52），这并不显着，但对于遵守浸没式宏观物质生物量的环境质量标准对日本的底部溶解氧（DO）非常重要。十一百分比体积淹没的宏观物质侵扰（PVI）与深度，底部，东西和南北从表面到底部电流速度的绝对值，总叶绿素A（CHL.A）和CHL.a的百分比，底部，东西和南北还产生了Blue-Green Algae，Epifauna生物量，浸没式宏观物种丰富，植物高核和Epifauna类富有量（P <0.05，n = 52）。当浸没式宏观物质生物质为＆ 6000gm（-2）或pvi是＆ 60％，对于鱼类和无脊椎动物的存活，浓度变得太低（＆ 4.3mg l（-1））。此外，Periphyton和Epifauna Taxa Richna的立方回归显示出拐点为3000gm（-2）次浸没式宏观物质生物质。 Epifaunal生物量，淹没的宏观物质物种丰富，珀西氏菌和EpiFaunal Taxa Richna，显示出30％PVI的拐点。以前的研究表明，特定的阈值发生了政权转变，社区结构和生物多样性会发生显着变化。因此，我们假设回归拐点是阈值指标。我们建议适当的浸没式宏观物质生物量为3000-6000gm（-2）或30-60％的PVI到MAI

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号