《Wetland》杂志刊登“亚马逊流域中部的热带泥炭积累”

作者：Outi Lahteenoja,Bernardo Flores,Bruce Nelson

刊物：《湿地》，2013年6月

关键词：巴西；亚马逊河中部；泥炭；美国南部；热带泥炭地

摘要：来自西亚马逊河的报道称：由于广袤的泥炭地多达7.5米深，在关于热带泥炭地在全球碳循环作用的讨论中，亚马逊河最近正受到关注。本研究的目标是探索中亚马逊河（巴西地区）的泥炭堆积。在7个野外站点中，有6个坐落在内格罗河流域，有一个靠近亚马逊河和内格罗河交界处。其中有4个站点的泥炭沉积厚度在0.1到2.1米不等，另外两个站点有其它有机土壤类型，不能被称为泥炭，只有一个站点没有任何有机沉积物。分别测量了四个泥炭地站点的烧失量、碳含量以及干容重，其变化范围分别是17.7%-97.4%、11%-59%和0.0002-0.572g/cm^-3。对所有的站点基于PH和泥炭厚度分类，这些站点均是矿物营养沼泽。本研究证实了亚马逊河泥炭地不仅存在于西亚马逊而且也存在于中亚马逊区域。中亚马逊河可能没有西亚马逊河那么深厚且丰富的泥炭地，这可能是由于在降雨、水文、地质条件、地形、底土类型和火灾频率等方面的差异引起的。

Tropical Peat Accumulation in Central Amazonia

Authors:Outi Lahteenoja,Bernardo Flores,Bruce Nelson

Journal: 《Wetland》,June,2013

Keywords: Brazil;Central Amazonia;Peat;South;America;Tropical peatland

Abstract: Amazonia has been recently included in discussions on the role of tropical peatlands in the global carbon cycle owing to extensive peatlands up to 7.5 m thick, reported from Western Amazonia (Peru). The aim of this study was to explore peat accumulation in Central Amazonia (Brazil). Of seven field sites, six located in the Negro River basin and one close to the junction of the Negro River with the Amazon, four had a peat deposit from 0.10 to 2.10 m thick. Another two sites had other organic soil type which could not be called peat. Only one site did not have any organic deposit. The loss-on-ignition (LOI), carbon content and dry bulk density, measured for the four peatland sites, varied from 17.7 to 97.4 %, 11 to 59 %, and 0.0002 to 0.572 g cm−3, respectively. All sites were classified as minerotrophic based on pH and peat thickness. The study confirms that Amazonian peatlands are not limited to Western Amazonia but also exist in Central Amazonia. We could not find as thick and extensive peats as in Western Amazonia, which we suggest is due to differences in rainfall and hydrology, tectonic conditions, topography, subsoil type and frequency of fires.

链接：http://link.springer.com/article/10.1007/s13157-013-0406-0#