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首页> 外文期刊>Environmental toxicology and chemistry >EFFECT OF PROLONGED EXPOSITION TO PULP MILL EFFLUENTS ON THE INVASIVE AQUATIC PLANT EGERIA DENSA AND OTHER PRIMARY PRODUCERS: A MESOCOSM APPROACH
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EFFECT OF PROLONGED EXPOSITION TO PULP MILL EFFLUENTS ON THE INVASIVE AQUATIC PLANT EGERIA DENSA AND OTHER PRIMARY PRODUCERS: A MESOCOSM APPROACH

机译：长期暴露于制浆厂废水对入侵性水生植物爱沙尼亚DENSA和其他主要生产者的影响：一种消融方法

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摘要

The recent disappearance of the aquatic plant Egeria densa, a Brazilian native invasive species, from a wetland in southern Chile prompted several efforts to unveil the origin of this phenomenon. Because these changes occurred by the time a newly built pulp mill started its operations in the area, a reasonable doubt for a cause-effect relationship is plausible. We implemented a mesocosm approach to directly evaluate the effect of treated pulp mill effluents (PMEs) on several growth-related parameters of E. densa as well as other primary producers. We hypothesize that effluent, at a dilution similar to that detected in the zone of the wetland where the negative environmental impacts were evident, has a significant negative effect on this aquatic plant as well as on other primary producers inside a mesocosm system. After a prolonged (months) exposure to both 0% PME with pure river water and a 4 to 5% (v/v) dilution of treated PME, no effect on E. densa was measured. Furthermore, plants exposed to effluent exhibited a significantly greater general growth rate. Coincidently, chlorophyll a concentration in the water column and periphyton biomass also changed over time, but without any pattern attributable to the effluent. Values of the autotrophic index obtained from the periphyton growth pattern did not suggest enrichment of the system with organic matter. Our results only refer to the direct effect of mill effluents on several biotic responses, but they represent an important advance toward generation of the scientific knowledge necessary to understand how the ecosystem functions while receiving this and other unquantified sources of water.
机译：最近，智利南部湿地的巴西本土入侵物种水生植物Egeria densa消失了，这促使人们做出了许多努力来揭示这种现象的根源。由于这些变化是在新建的纸浆厂在该地区开始运营时发生的，因此对因果关系的合理怀疑是合理的。我们实施了中观方法来直接评估处理后的纸浆厂废液（PME）对E. densa以及其他主要生产者的几种与生长相关的参数的影响。我们假设废水的稀释度类似于在湿地区域中对环境造成负面影响的区域所检测到的稀释度，对这种水生植物以及中观世界系统内的其他主要生产者均具有显着的负面影响。在用纯净河水长时间（数月）暴露于0％PME和处理过的PME稀释度为4％至5％（v / v）的情况下，均未检测到对大肠杆菌的影响。此外，暴露于污水中的植物表现出明显更高的总体生长速率。巧合的是，水柱中的叶绿素a浓度和附生生物量也随时间而变化，但没有任何可归因于污水的模式。从周围植物生长模式获得的自养指数的值并不表明该系统富含有机物。我们的结果仅涉及工厂废水对几种生物反应的直接影响，但它们代表了在获取必要的科学知识方面取得的重要进展，这些知识是了解生态系统如何在接收此水和其他未量化水源的同时发挥作用的。

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  • 来源
    《Environmental toxicology and chemistry》 |2008年第2期|387-396|共10页
  • 作者

    Alvaro T. Palma; Marcelo G. Silva; Carlos A. Munoz; Carolina Cartes; Fabian M. Jaksic;

  • 作者单位

    Pontificia Universidad Catolica de Chile and Center for Advanced Studies in Ecology and Biodiversity (CASEB),Alameda 340 Casilla 114-D, Santiago, Chile;

    Pontificia Universidad Catolica de Chile and Center for Advanced Studies in Ecology and Biodiversity (CASEB),Alameda 340 Casilla 114-D, Santiago, Chile;

    Pontificia Universidad Catolica de Chile and Center for Advanced Studies in Ecology and Biodiversity (CASEB),Alameda 340 Casilla 114-D, Santiago, Chile;

    DSS Ambiente, Ernesto Pinto Lagarrigue 2C, San Pedro de la Paz, Chile;

    Pontificia Universidad Catolica de Chile and Center for Advanced Studies in Ecology and Biodiversity (CASEB),Alameda 340 Casilla 114-D, Santiago, Chile;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    mesocosm; primary producers; egeria densa; pulp mill;

    机译：中观主要生产者;鸡蛋花制浆厂;

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