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首页> 外文期刊>Environmental toxicology and chemistry >Temperature influences on water permeability and chlorpyrifos uptake in aquatic insects with differing respiratory strategies.
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Temperature influences on water permeability and chlorpyrifos uptake in aquatic insects with differing respiratory strategies.

机译：温度对采用不同呼吸策略的水生昆虫的透水性和毒死rif吸收的影响。

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Aquatic insects have evolved diverse respiratory strategies that range from breathing atmospheric air to breathing dissolved oxygen. These strategies result in vast morphological differences among taxa in terms of exchange epithelial surface areas that are in direct contact with the surrounding water that, in turn, affect physiological processes. This paper examines the effects of acute temperature shifts on water permeability and chlorpyrifos uptake in aquatic insects with different respiratory strategies. While considerable differences existed in water permeability among the species tested, acute temperature shifts raised water influx rates similarly in air-breathing and gill-bearing taxa. This contrasts significantly with temperature-shift effects on chlorpyrifos uptake. Temperature shifts of 4.5 degrees C increased 14C-chlorpyrifos accumulation rates in the gill-bearing mayfly Cinygma sp. and in the air-breathing hemipteran Sigara washingtonensis. However, the temperature-induced increase in 14C-chlorpyrifos uptake after 8 h of exposure was 2.75-fold higher in Cinygma than in Sigara. Uptake of 14C-chlorpyrifos was uniformly higher in Cinygma than in Sigara in all experiments. These findings suggest that organisms with relatively large exchange epithelial surface areas are potentially more vulnerable to both osmoregulatory distress as well as contaminant accumulation. Temperature increases appear more likely to impact organisms that have relatively large exchange epithelial surface areas, both as an individual stressor and in combination with additional stressors such as contaminants.
机译：水生昆虫已经进化出多种呼吸策略，范围从呼吸大气到呼吸溶解氧。这些策略在与周围水直接接触的交换上皮表面积方面导致了分类群之间的巨大形态差异，进而影响了生理过程。本文研究了急性温度变化对具有不同呼吸策略的水生昆虫的透水性和毒死rif吸收的影响。尽管所测试的物种之间的透水性存在显着差异，但急剧的温度变化增加了空气呼吸和带g类群中水的流入速度。这与温度变化对毒死temperature吸收的影响形成鲜明对比。 4.5摄氏度的温度变化增加了带may may Cinygma sp。中14C-毒死rif的积累速率。以及呼吸着空气的半足动物Sigara washingtonensis。然而，温度引起的14C-毒死rif摄取量在暴露8小时后比锡加拉河高2.75倍。在所有实验中，Cinygma中14C-毒死rif的吸收均高于Sigara。这些发现表明，具有较大交换上皮表面积的生物体可能更容易受到渗透调节困扰和污染物积累。温度升高似乎更可能影响具有相对较大交换上皮表面积的生物，无论是作为单个应激源还是与其他应激源（如污染物）结合使用。

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