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首页> 外文期刊>Aquatic Sciences >Extreme climate events can slow down litter breakdown in streams
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Extreme climate events can slow down litter breakdown in streams

机译：极端气候事件可以减缓溪流中的垃圾分类

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摘要

Extreme temperatures have increased in intensity, duration and frequency in the last century, with potential consequences on key ecological processes such as organic matter breakdown. Many stream ecosystems are fueled by the breakdown of terrestrial leaf litter, which is exposed to atmospheric conditions for certain periods of time before entering the stream. Thus, extreme warming or freezing events may affect the litter physicochemical structure, which could translate into altered breakdown within the stream. The above prediction was tested by exposing litter of common riparian tree species in southern Chile to freezing (-20 oC; dry or wet litter) or heating (40 oC) and comparing breakdown with control litter exposed to room temperature (20 oC), separating the effects of different breakdown agents (i.e., leaching, microorganisms and detritivores). The greatest effects were found in wet litter subjected to freezing; this treatment significantly increased leaching in the short term (48 h) and slowed down breakdown in the long term (30 days), mostly due to the inhibition of microbial breakdown. Heating also retarded microbial breakdown, but the effect was smaller. Our results suggest that short-term extreme temperatures-particularly cold ones-have the potential to slow down litter breakdown in streams, which will most likely impact global biogeochemical cycles where streams play a key role.
机译：在上个世纪的强度，持续时间和频率的极端温度有所增加，对有机物质崩溃等关键生态过程具有潜在的后果。许多溪流生态系统被陆地叶垫片的击穿燃烧，在进入流之前暴露于大气条件。因此，极端变暖或冻结事件可能会影响垃圾物理化学结构，其可以转化为流的改变的击穿。通过在智利南部的常见河流树种垃圾到冻结（-20 oc;干燥或湿垃圾）或加热（40℃）并将细分与室温（20℃）进行比较，分离不同击穿剂的影响（即浸出，微生物和Detritivores）。在经受冻结的湿垃圾中发现了最大的效果;这种治疗在短期内（48小时）显着增加了浸出，并在长期（30天）中减缓了击穿，主要是由于抑制微生物分解。加热也延迟了微生物分解，但效果较小。我们的研究结果表明，短期极端温度 - 特别是冷的 - 有可能减缓流垃圾的垃圾分解，这很可能会影响流的流化发挥作用的全球生物地球化学循环。

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  • 来源
    《Aquatic Sciences》 |2020年第2期|25.1-25.7|共7页
  • 作者

    Correa-Araneda Francisco; Tonin Alan M.; Perez Javier; Alvarez Katia; Lopez-Rojo Naiara; Diaz Angie; Esse Carlos; Encina-Montoya Francisco; Figueroa Ricardo; Cornejo Aydee; Boyero Luz;

  • 作者单位

    Univ Autonoma Chile IEH Unidad Cambio Climat & Medio Ambiente Fac Arquitectura & Construcc Temuco Chile;

    Univ Brasilia Dept Ecol Aquariparia Limnol Lab IB Brasilia DF Brazil;

    Univ Basque Country UPV EHU Fac Sci & Technol Dept Plant Biol & Ecol Leioa Spain;

    Univ Concepcion Fac Ciencias Nat & Oceanog Dept Zool Concepcion Chile;

    Univ Basque Country UPV EHU Fac Sci & Technol Dept Plant Biol & Ecol Leioa Spain;

    Univ Concepcion Fac Ciencias Nat & Oceanog Dept Zool Concepcion Chile;

    Univ Autonoma Chile IEH Unidad Cambio Climat & Medio Ambiente Fac Arquitectura & Construcc Temuco Chile;

    Univ Catolica Temuco Nucleo Estudio Ciencias Ambientales NEA Temuco Chile|Univ Catolica Temuco Fac Recursos Nat Dept Ciencias Ambientales Temuco Chile;

    Univ Concepcion Fac Ciencias Ambientales Dept Ecosistemas Acuat Concepcion Chile;

    Univers Panama Programa Doctorado Ciencias Nat Enfasis Entomol Panama City Panama|Inst Conmemorat Gorgas Estudios Salud Lab Macroinvertebrados Acuat Ave Justo Arosemena & Calle 35 Panama City 081602593 Panama;

    Univ Basque Country UPV EHU Fac Sci & Technol Dept Plant Biol & Ecol Leioa Spain|IKERBASQUE Bilbao Spain;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Benthos; Climate change; Ecosystem approach; Invertebrates; Riparian; Stream;

    机译：Benthos;气候变化;生态系统方法;无脊椎动物;河岸;溪流;

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