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首页> 外文期刊>Archiv fur Hydrobiologie >Energy input from a riparian forest into a headwater stream in Hokkaido, Japan
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Energy input from a riparian forest into a headwater stream in Hokkaido, Japan

机译：日本北海道沿岸森林的能量输入

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摘要

We investigated the amounts and types of organic matter that entered a coastal forest stream in Hokkaido, northern Japan. Organic matter input from the riparian forest was collected using litter traps, and benthic organic matter was collected from the streambed. Plant parts were weighed, and monthly nitrogen and carbon inputs were calculated. Organic matter input was highest in October, accounting for 58 % of the total annual amount, whereas input between May and August comprised only 22 % of the total amount. Frass and various plant parts, Such as flowers and green leaves, contributed nitrogen from May to August, and the total input during this period accounted for 39 % of the annual input, which was comparable to the input recorded in October. In May and June, senescent leaves accounted for 30-40 % to the total standing crop although only green leaves entered the stream during this period. To explore the relationship between benthic organic matter and stream macroinvertebrate density, we collected the two dominant summer growing shredder species (Goerodes complicatus [Trichoptera] and Sternomoera rhyaca [Gammaridea]). Densities of S. rhyaca were significantly related to the standing crop of detritus; G. complicatus showed the same trend, although the relationship was not significant. During spring and summer, plant matter that contained high levels of nitrogen contributed to increased nutrient resources in the stream. This organic matter probably affected the growth and development of stream macroinvertebrates when resources were scarce during early summer.
机译：我们调查了进入日本北部北海道沿海森林溪流的有机物的数量和类型。利用垃圾收集器收集河岸森林输入的有机物，并从河床收集底栖有机物。称重植物部分，并计算每月的氮和碳输入量。 10月份的有机物投入最高，占年度总量的58％，而5月至8月之间的有机物投入仅占总量的22％。在5月至8月期间，花朵和绿叶等植物和各种植物部分贡献了氮，这一时期的总投入占年度投入的39％，与10月份的投入相当。在5月和6月，衰老的叶片占总站立作物的30-40％，尽管在此期间只有绿叶进入。为了探索底栖有机质与河流大型无脊椎动物密度之间的关系，我们收集了两个夏季生长的主要切碎物种（Goerodes complicatus [Trichoptera]和Sternomoera rhyaca [Gammaridea]）。土生丁香的密度与碎屑的现存作物显着相关。尽管这种关系并不明显，但是复杂的G.显示出相同的趋势。在春季和夏季，含氮量高的植物物质有助于增加溪流中的养分资源。当初夏资源匮乏时，这种有机物质可能影响了河流大型无脊椎动物的生长和发育。

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