Difference in the production and elemental composition of litter in Kandelia obovata mangrove forests due to site elevation

IF 2.1 4区地球科学 Q2 MARINE & FRESHWATER BIOLOGY

Journal of Sea Research Pub Date : 2024-06-01 DOI:10.1016/j.seares.2024.102508

Jiahui Chen , Min Gao , Guangcheng Chen , Shunyang Chen , Yong Ye

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Abstract

Site elevation is a crucial driver for mangrove restoration, and litter production restoration is a significantly important target of mangrove restoration, but little attention has been paid to impact of site elevation on the production and elemental composition of litter in the restored mangrove forests. This study compared the production and elemental composition of mangrove litter at the three intertidal elevations, to explore impacts of site elevation on the production and elemental composition of mangrove litter. Compared with the upper elevation site, significantly lower annual litter production was found at the lower elevation site. Leaf litter was the main component of litter, up to 60.49% of total litter production at the upper elevation site, while reproductive materials (flower and fruit) were the key part of litter and accounted for 50.80% (the lower elevation site) and 57.02% (the middle elevation site) of total litter production. As site elevation decreased, element stocks within total litter decreased by approximately 65.39% (organic carbon), 65.17% (total nitrogen) and 63.66% (total phosphorus), respectively, which was attributed more to element stocks within leaf litter instead of element stocks within the other litter. Results showed that site elevation decreases resulted in decreased litter production, altered composition percentages of litter production, and reduced element stocks within total litter. In the future mangrove restoration projects, it is advisable to prioritize upper elevation (above local mean level) for promoting litter production.

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因地点海拔高度而造成的 Kandelia obovata 红树林垃圾产量和元素组成的差异

生境海拔是红树林恢复的关键驱动因素，而恢复红树林的枯落物生产是红树林恢复的重要目标，但很少有人关注生境海拔对恢复后的红树林枯落物生产和元素组成的影响。本研究比较了三个潮间带海拔高度的红树林枯落物产量和元素组成，以探讨海拔高度对红树林枯落物产量和元素组成的影响。与海拔较高的地点相比，海拔较低地点的红树林垃圾年产量明显较低。叶片残余物是残余物的主要组成部分，在高海拔地区占残余物总产量的 60.49%，而生殖物质（花和果实）是残余物的主要组成部分，分别占残余物总产量的 50.80%（低海拔地区）和 57.02%（中海拔地区）。随着地点海拔的降低，总凋落物中的元素储量分别减少了约 65.39%（有机碳）、65.17%（总氮）和 63.66%（总磷），这主要归因于叶片凋落物中的元素储量，而不是其他凋落物中的元素储量。结果表明，地点海拔降低导致枯落物产量减少、枯落物产量的组成比例改变以及总枯落物中的元素储量减少。在未来的红树林恢复项目中，建议优先考虑高海拔地区（高于当地平均水平），以促进枯落物的产生。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sea Research 地学-海洋学

CiteScore

3.20

自引率

5.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Sea Research is an international and multidisciplinary periodical on marine research, with an emphasis on the functioning of marine ecosystems in coastal and shelf seas, including intertidal, estuarine and brackish environments. As several subdisciplines add to this aim, manuscripts are welcome from the fields of marine biology, marine chemistry, marine sedimentology and physical oceanography, provided they add to the understanding of ecosystem processes.