Eco-exergy based self-organization of the macrobenthic faunal assemblage during mangrove succession in Zhanjiang, China
Eco-exergy based self-organization of the macrobenthic faunal assemblage during mangrove succession in Zhanjiang, China
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DOI：
10.1016/j.ecolind.2018.08.044
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发表时间：
2018-12
影响因子：
6.9
通讯作者：
Quan Chen;Qian Zhao;Pimao Chen;Hongfang Lu;S. Jian
中科院分区：
文献类型：
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作者：
Quan Chen;Qian Zhao;Pimao Chen;Hongfang Lu;S. Jian
生态（生态）已被用来评估健康和自组织的水生和湿地生态系统的扰动或自然演替。大型底栖动物是红树林生态系统的重要组成部分，但它们在红树林演替过程中的自组织机制尚不清楚。应用生态（Eco）（火用）方法，对湛江红树林原生群落（无植被浅滩）、早期群落（白骨壤）、中期群落（桐花树）和晚期群落（木榄+红海榄）的大型底栖动物群落的自组织过程进行了定量研究。在红树林演替的丰水期，大型底栖动物群落的生态（火用）和生物量均呈下降趋势。在红树林演替过程中，大型底栖动物群落的比生态（火用）相对稳定，但软体动物的比生态（火用）呈下降趋势，节肢动物的比生态（火用）呈上升趋势。统计分析表明，红树林演替过程中大型底栖动物群落的自组织主要与一系列植被特征和沉积物理化性质的发展有关，植物冠幅、植物密度、沉积物铵态氮和沉积物总氮。与物种丰富度和功能群的多样性趋势不同，本研究证实了大型底栖动物群落的自组织趋势减弱，主要来源于生物量和遗传信息。这些结果突出了保护大型底栖动物群落在红树林，特别是在后期演替阶段的重要性。
Eco-exergy (ecological exergy) has been used to evaluate the health and self-organization of aquatic and wetland ecosystems following perturbation or natural succession. Although macrobenthic fauna are important components of mangrove ecosystems, their self-organization during mangrove succession is unclear. In this study, eco-exergy was used to quantify the self-organization processes of macrobenthic faunal assemblages in a mangrove chronosequence that included a primary (unvegetated shoal), early (Avicennia marina), middle (Aegiceras corniculatum), and late (Bruguiera gymnorrhiza+Rhizophora stylosa) community in Zhanjiang, China. Eco-exergy and biomass of the macrobenthic faunal community tended to decrease in the wet season during mangrove succession. The specific eco-exergy of the macrobenthic faunal community, in contrast, remained relatively constant in both wet and dry seasons during mangrove succession, although mollusk eco-exergy tended to decrease and arthropod eco-exergy tended to increase. Statistical analyses indicated that the self-organization of the macrobenthic faunal community during mangrove succession was mainly associated with the development of a suite of vegetation characteristics and sediment physicochemical properties, e.g., plant crown breadth, plant density, sediment ammonium nitrogen and sediment total nitrogen. Unlike the diversification trends of species richness and functional groups, this study confirmed the decreased self-organization trend of macrobenthic fauna assemblage mainly derived from biomass and genetic information. These results highlight the importance of conserving the macrobenthic faunal community in mangrove forests, especially in the late successional stages.