Influence of summer drought on spatial patterns of resource availability and detritus processing in Mediterranean stream sub-basins (Sardinia, Italy)
Influence of summer drought on spatial patterns of resource availability and detritus processing in Mediterranean stream sub-basins (Sardinia, Italy)
复制标题
夏季干旱对地中海河流次流域资源可用性和碎屑加工空间格局的影响（意大利撒丁岛）
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
A. Basset
中科院分区：
文献类型：
--
作者：
Maurizio Pinna;A. Fonnesu;F. Sangiorgio;A. Basset
我们研究了芦苇碎屑分解的变化模式，并在不同程度上暴露于夏季干旱事件的三个地中海型子流域的场资源可用性的模式。研究在1998年春夏和1998-1999年秋冬进行，在1 s t到4 t h顺序流。碎屑处理和大型无脊椎动物的身体状况进行了测量。分解率显着较高，在春夏比秋冬，在相对未扰动比扰动子流域，并在高阶比低阶流。干扰的影响随着流序的增加而减少，表明高阶流比低阶流对干旱事件有更大的恢复力。大型无脊椎动物的身体状况表明，现场资源的可用性空间协变与碎石腐烂和生态系统恢复力的模式。
We studied the variation patterns of Phragmites australis detritus decomposition and derived patterns of field resource availability in three Mediterranean-type sub-basins exposed to varying degrees to summer drought events. The study was carried out during spring-summer 1998 and fall-winter 1998-1999, in 1 s t to 4 t h order streams. Detritus processing and macroinvertebrate body-condition were measured. Decomposition rates were significantly higher in spring-summer than in fall-winter, in relatively unperturbed than in perturbed sub-basins, and in high-order than low-order streams. The influence of disturbance decreased with increasing stream order, suggesting that higher order streams have greater resilience to drought events than lower order streams. The body condition of macroinvertebrates suggested patterns of field resource availability spatially covariant with those of detritus decay and ecosystem resilience.