Mangrove carbon sink. Do burrowing crabs contribute to sediment carbon storage? Evidence from a Kenyan mangrove system
Mangrove carbon sink. Do burrowing crabs contribute to sediment carbon storage? Evidence from a Kenyan mangrove system
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DOI：
10.1016/j.seares.2013.08.010
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发表时间：
2014-01-01
影响因子：
2
通讯作者：
Cannicci, Stefano
中科院分区：
文献类型：
--
作者：
Andreetta, Anna;Fusi, Marco;Cannicci, Stefano
红树林生态系统被认为是一个重要的碳库，具有潜在的碳汇作用。然而，沉积物/土壤的能力，以存储有机碳和底栖动物对土壤有机碳（SOC）股票在红树林C-贫土壤的影响知之甚少。研究大型底栖动物对肯尼亚加齐湾红树林土壤有机碳储量及其动态的影响。虽然这些土壤中的有机碳含量相对较低，但它们导致了与其他森林生态系统相当的大的生态系统碳储量。Gazi湾土壤有机碳的变化范围为3.6 kg m（-2）（类红树林带）至29.7 kg m（-2）（红树林带），土壤深度为0 cm至80 cm。不同优势蟹种及其对土壤环境的影响可能解释了土壤有机碳的空间分布和数量的高度异质性。另一个主要决定因素是底土中存在富含有机物的土层，其年代测定表明，它们的形成与全新世海平面上升有关。断代和土壤形态特征被证明是一个有效的支持，讨论大型底栖动物的发展战略和土壤生态系统功能之间的联系。(C)2013爱思唯尔有限公司版权所有。
Mangrove ecosystems are acknowledged as a significant carbon reservoir, with a potential key role as carbon sinks. Little however is known on sediment/soil capacity to store organic carbon and the impact of benthic fauna on soil organic carbon (SOC) stock in mangrove C-poor soils. This study aimed to investigate the effects of macrobenthos on SOC storage and dynamic in mangrove forest at Gazi Bay (Kenya). Although the relatively low amount of organic carbon (OC%) in these soils, they resulted in the presence of large ecosystem carbon stock comparable to other forest ecosystems. SOC at Gazi bay ranged from 3.6 kg m(-2) in a Desert-like belt to 29.7 kg m(-2) in the Rhizophora belt considering the depth soil interval from 0 cm to 80 cm. The high spatial heterogeneity in the distribution and amount of SOC seemed to be explained by different dominant crab species and their impact on the soil environment. A further major determinant was the presence, in the subsoil, of horizons rich in organic matter, whose dating pointed to their formation being associated with sea level rise over the Holocene. Dating and soil morphological characters proved to be an effective support to discuss links between the strategies developed by macrobenthos and soil ecosystem functioning. (C) 2013 Elsevier B.V. All rights reserved.