高度浑浊过渡水域凋落叶降解:吉伦特河口凋落叶袋实验的初步结果

IF 1.5 Q1 Earth and Planetary Sciences

Geodinamica Acta Pub Date : 2015-01-02 DOI:10.1080/09853111.2013.877233

A. Fuentes-Cid, É. Chauvet, H. Etcheber, E. De-Oliveira, A. Sottolichio, S. Schmidt

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引用次数: 6

摘要

在一个非常高浊度的大潮汐河口，吉伦特河口(法国西南部)，用凋落物袋研究了橡树(栎木)叶子的分解率。第一个实验表明，与水柱相比，在水-沉积物界面(泥浆接触:缺氧条件，减少物理破碎)处橡树叶的分解速率明显降低。研究结果指出了水动力条件对河流-河口系统凋落叶退化的影响。关于水陆联系，我们的观察表明，叶片分解动力学的直接变化，然后，粗颗粒有机物的回收和运输过程的潜在延迟，特别是在自然水流改变的背景下，由于全球和土地利用的变化。

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Leaf litter degradation in highly turbid transitional waters: preliminary results from litter-bag experiments in the Gironde Estuary

The rates of decomposition of oak (Quercus robur) leaves have been examined using litter bags in a very high turbidity macrotidal estuary, the Gironde Estuary (S.W. France). The first experiments show a marked decrease in the decomposition rate of oak leaves at the water-sediment interface (mud-contact: anoxic conditions, reduced physical fragmentation) in comparison to the water column. The results point out the impact of hydrodynamic conditions on leaf litter degradation in such fluvio-estuarine systems. Regarding the aquatic-terrestrial linkage, our observations suggest direct changes in leaf decomposition kinetics and then, a potential delay on the recycling and transport processes of coarse particulate organic matter, especially in a context of modification of the natural water flow, due to global and land use changes.

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来源期刊

Geodinamica Acta 地学-地球科学综合

CiteScore

4.50

自引率

0.00%

发文量

审稿时长

25 weeks

期刊介绍： Geodinamica Acta provides an international and interdisciplinary forum for the publication of results of recent research dealing with both internal and external geodynamics. Its aims to promote discussion between the various disciplines that work on the dynamics of the lithosphere and hydrosphere. There are no constraints over themes, provided the main thrust of the paper relates to Earth''s internal and external geodynamics. The Journal encourages the submission of papers in all fields of earth sciences, such as biostratigraphy, geochemistry, geochronology and thermochronology, geohazards and their societal impacts, geomorphology, geophysics, glaciology, igneous and metamorphic petrology, magmatism, marine geology, metamorphism, mineral-deposits and energy resources, mineralogy, orogeny, palaeoclimatology, palaeoecology, paleoceanograpgy, palaeontology, petroleum geology, sedimentology, seismology and earthquakes, stratigraphy, structural geology, surface processes, tectonics (neoteoctonic, plate tectonics, seismo-tectonics, Active tectonics) and volcanism. Geodinamica Acta publishes high quality, peer-reviewed original and timely scientific papers, comprehensive review articles on hot topics of current interest, rapid communications relating to a significant advance in the earth sciences with broad interest, and discussions of papers that have already appeared in recent issues of the journal. Book reviews are also included. Submitted papers must have international appeal and regional implications; they should present work that would be of interest to many different specialists. Geographic coverage is global and work on any part of the world is considered. The Journal also publishes thematic sets of papers on topical aspects of earth sciences or special issues of selected papers from conferences.