Inputs of Particulate Organic Matter to Streams with Different Riparian Vegetation
Inputs of Particulate Organic Matter to Streams with Different Riparian Vegetation
复制标题
不同河岸植被河流的颗粒有机物输入
DOI：
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发表时间：
1997
影响因子：
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通讯作者：
A. Elósegui
中科院分区：
文献类型：
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作者：
J. Pozo;E. González;J. Díez;J. Molinero;A. Elósegui
为了测试是否造林桉树影响的数量，质量和时间的凋落物的投入，我们评估了粗颗粒有机物（CPOM）的输入2个源头流，一个流过混合落叶林，一个通过蓝桉种植园。垂直和横向陷阱采样至少每月，收集的材料分为4个主要类别：落叶（几个物种），水果和花，树枝和树皮，碎片。桉树种植园减少了32%的总凋落物输入，和73%的横向输入，与落叶阔叶混交林相比。它也有一个不太明显的季节性模式的输入，和不同的时间的峰值凋落物，在落叶林的峰值发生在秋季，而在桉树种植园的峰值发生在夏季。同样，桉树下的叶多样性大大减少，98%的落叶质量从1种，导致广泛的变化，凋落物质量。凋落物输入桉树人工林贡献了67%的氮和65%的磷比在落叶林流。虽然桉树种植园的有机投入的广泛变化的结果，底栖生物群落的结构或功能没有显着的影响到目前为止，在Agüera流。然而，谨慎建议保持本地河岸林缓冲带的外来输入的数量和时间。
To test whether afforestation with eucalyptus affects the amount, quality, and timing of litter inputs, we evaluated the inputs of coarse particulate organic matter (CPOM) to 2 headwater streams, one flowing through a mixed deciduous forest and one through a plantation of Eucalyptus globulus. Vertical and lateral traps were sampled at least monthly, and the material collected was sorted into 4 main categories: fallen leaves (several species), fruits and flowers, twigs and bark, and debris. The eucalyptus plantation resulted in a reduction of 32% of total litter inputs, and 73% of lateral inputs, compared to the mixed deciduous forest. It also had a less marked seasonal pattern of inputs, and different timing of peak litterfall, the peak in the deciduous forest occurring in autumn, whereas in the eucalyptus plantation the peak occurred in summer. Similarly, leaf diversity was greatly reduced under the eucalyptus, with 98% of the leaf litter mass from 1 species, resulting in broad changes in litter quality. Litter inputs in the eucalyptus plantations contributed 67% less nitrogen and 65% less phosphorus to the stream than in the deciduous forest. Although eucalyptus plantations result in broad changes in organic inputs, no drastic impacts on the structure or function of benthic communities are evident so far in the Agüera stream. Nevertheless, caution suggests maintaining the quantity and timing of allochthonous inputs by keeping buffer strips of native riparian forest.