广西山口不同演替阶段红树植物叶茎根的生态化学计量特征*

doi:10.11978/2022119

热带海洋学报 ›› 2023, Vol. 42 ›› Issue (3): 149-157.doi: 10.11978/2022119CSTR: 32234.14.2022119

广西山口不同演替阶段红树植物叶茎根的生态化学计量特征^*

邱瑾¹^,²^,³(), 戴洪涛⁴, 邢永泽²(), 黄大吉²^,¹(), 尹群健², 程德伟²

1.上海交通大学海洋学院, 上海 200030
2.广西北部湾海洋资源环境与可持续发展重点实验室(自然资源部第四海洋研究所), 广西北海 536015
3.卫星海洋环境动力学国家重点实验室(自然资源部第二海洋研究所), 浙江杭州 310012
4.广西山口红树林生态自然保护区管理处, 广西北海 536122

收稿日期:2022-05-23 修回日期:2022-07-28 出版日期:2023-05-10 发布日期:2022-08-02
作者简介:
邱瑾(1997—), 女, 江苏省丹阳市人, 硕士研究生, 从事红树林研究。email: qiujin@sjtu.edu.cn
*感谢广西壮族自治区北海市山口红树林国家级自然保护区管理处的大力支持。
基金资助:
国家自然科学基金项目(42049911); 国家自然科学基金项目(42141016); 自然资源部第四海洋研究所基本科研业务费专项资金资助项目(202005); 广西红树林保护与利用重点实验室系统性课题项目(GKLMC-17A01)

Leaves, stems and roots stoichiometry characteristics of mangrove plants at different succession stages in the Shankou National Mangrove Nature Reserve, China^*

QIU Jin¹^,²^,³(), DAI Hongtao⁴, XING Yongze²(), HUANG Daji²^,¹(), Yin Qunjian², CHENG Dewei²

1. School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
2. Guangxi Key Laboratory of Beibu Gulf Marine Resources, Environment and Sustainable Development (Fourth Institute of Oceanography, Ministry of Natural Resources), Beihai 536015, China
3. State Key Laboratory of Satellite Ocean Environment Dynamics (Second Institute of Oceanography, Ministry of Natural Resources), Hangzhou 310012, China
4. Shankou National Mangrove Ecosystem Nature Reserve Administration, Beihai 536122, China

Received:2022-05-23 Revised:2022-07-28 Online:2023-05-10 Published:2022-08-02
Supported by:
National Natural Science Foundation of China(42049911); National Natural Science Foundation of China(42141016); Scientific Research Fund of the Fourth Institute of Oceanography, MNR(202005); Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization(GKLMC-17A01)

摘要/Abstract

摘要：

红树林是一种典型的湿地生态系统, 研究其生态化学计量特征对了解不同演替阶段红树植物养分利用、分配以及环境适应策略具有重要意义。本文以广西山口红树林保护区由海向岸不同演替阶段的三种红树植物(白骨壤、秋茄和木榄)为研究对象, 比较不同器官碳(C)、氮(N)、磷(P)以及沉积物中有机碳(sedimental organic carbon, SOC)、全氮(total nitrogen, TN)、全磷(total phosphorus, TP)的化学计量特征, 分析三个演替阶段的红树植物不同器官和沉积物养分的生态化学计量特征。结果表明: C、N、P含量在三个演替阶段植物中均表现为叶、茎大于根(P<0.05), 白骨壤叶和茎的N、P含量显著高于秋茄和木榄(P<0.05), 不同演替阶段植物对于养分的利用策略不同, 演替初期为竞争, 演替后期为防御。相关性分析显示, 秋茄茎与根中的P含量呈显著负相关(P<0.05), 木榄叶与茎中的N含量、P含量均呈显著正相关(P<0.05), 红树植物叶、茎的N、P含量与土壤SOC、TP以及C:N有显著的负相关性, 随着由海向岸的群落演替, 红树植物生长从N限制转为N、P两种元素共同限制。

关键词: 红树植物, 演替, 适应机制, 生态化学计量学

Abstract:

Mangrove is one of the typical coastal wetland ecosystems. Studying its ecological stoichiometry characteristics is important to understand the nutrient utilization, distribution and environmental adaptation strategies of mangrove plants at different successional stages. In the present study, three typical mangrove species, Avicennia marina, Kandelia obovate, and Bruguiera gymnorrhiza were studied. The stoichiometry characteristics of carbon (C), nitrogen (N), and phosphorus (P) in different organs and the sedimental organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) in the sediments were measured and compared. The ecological stoichiometry characteristics of different organs and sediment nutrients in three intertidal zones of mangrove plants were also analyzed. The results showed that the C, N, and P contents of the three mangrove plants were higher in the leaves and stems than those in the roots(P<0.05). The N and P contents in the leaves and stems of A. marina were significantly higher than those of K. obovate and B. gymnorrhiza (P<0.05). Mangrove plants have unique adaptation strategies to habitats in the different intertidal zones. At the early stage of succession, the plants were distributed in low tide with a competitive strategy. At the advanced stage of succession, the plants were distributed in high tide and the strategy was changed to defense. Correlation analysis showed that the P content in the stems and roots of K. obovate was negatively correlated (P<0.05), while the N and P contents in the leaves and stems were positively correlated (P<0.05). The contents of N and P in the leaves and stems were negatively correlated with SOC, TP and C:N. It was also found that with the succession of mangrove communities from the sea towards the land, the limiting element for the mangrove plants growth has changed from N to both N and P.

Key words: mangrove plant, succession, adaptation strategy, ecological stoichiometry

邱瑾, 戴洪涛, 邢永泽, 黄大吉, 尹群健, 程德伟. 广西山口不同演替阶段红树植物叶茎根的生态化学计量特征^*[J]. 热带海洋学报, 2023, 42(3): 149-157.

QIU Jin, DAI Hongtao, XING Yongze, HUANG Daji, Yin Qunjian, CHENG Dewei. Leaves, stems and roots stoichiometry characteristics of mangrove plants at different succession stages in the Shankou National Mangrove Nature Reserve, China^*[J]. Journal of Tropical Oceanography, 2023, 42(3): 149-157.

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主要树种	样方号	纬度	经度
白骨壤	1	21°29′26.257''N	109°45′59.299''E
	2	21°29′22.898''N	109°46′04.188''E
	3	21°29′20.515''N	109°46′07.309''E
秋茄	1	21°29′39.548''N	109°45′50.677''E
	2	21°29′33.562''N	109°45′53.338''E
	3	21°29′29.541''N	109°45′54.554''E
木榄	1	21°29′53.596''N	109°45′37.242''E
	2	21°29′52.703''N	109°45′37.487''E
	3	21°29′51.371''N	109°45′42.156''E

植物群落	生活型	平均基径/cm	平均胸径/cm	平均树高/cm	平均冠幅/cm	沉积物类型	分布区域
白骨壤	灌木或小乔木	7.31	4.87	215	258×225	淤泥质	低潮线
秋茄	小乔木	13.36	9.45	393	320×241	砂质	中潮线
木榄	小乔木	23.24	11.52	378	431×351	砂质	高潮线

植物群落	SOC/(g·kg^-1)	TN/(g·kg^-1)	TP/(g·kg^-1)	C:N	C:P	N:P
白骨壤	12.85±3.14^b	0.66±0.18^b	0.35±0.11^b	19.45±1.21^b	38.58±10.93^a	1.97±0.44^a
秋茄	40.11±11.78^a	1.61±0.26^a	0.61±0.06^a	24.48±4.07^ab	67.00±22.39^a	2.68±0.50^a
木榄	34.46±11.91^a	1.27±0.44^ab	0.53±0.08^a	27.00±1.54^a	68.28±34.30^a	2.53±1.28^a

植物元素	器官	沉积物养分含量及计量比
植物元素	器官	SOC	TN	TP	C:N	C:P	N:P
C	叶	-0.26	-0.25	-0.40	-0.26	-0.07	0.00
	茎	0.11	0.13	0.18	-0.02	-0.03	-0.04
	根	0.83**	0.76*	0.53	0.83**	0.76*	0.61
植物元素	器官	沉积物养分含量及计量比
植物元素	器官	SOC	TN	TP	C:N	C:P	N:P
N	叶	-0.69*	-0.63	-0.81**	-0.78*	-0.42	-0.21
	茎	-0.68*	-0.60	-0.75*	-0.85**	-0.44	-0.22
	根	-0.54	-0.50	-0.54	-0.67*	-0.45	-0.31
P	叶	-0.71*	-0.67*	-0.78*	-0.77*	-0.48	-0.28
	茎	-0.69*	-0.60	-0.61	-0.88**	-0.55	-0.34
	根	0.44	0.54	0.51	0.05	0.17	0.20
C:N	叶	0.58	0.49	0.68*	0.80**	0.37	0.14
	茎	0.54	0.42	0.66	0.82**	0.30	0.06
	根	0.67*	0.61	0.51	0.76*	0.61	0.46
C:P	叶	0.56	0.48	0.60	0.77*	0.40	0.20
	茎	0.49	0.35	0.45	0.82**	0.39	0.17
	根	0.15	0.04	-0.08	0.42	0.32	0.23
N:P	叶	0.61	0.55	0.57	0.71*	0.49	0.33
	茎	0.46	0.35	0.23	0.71*	0.52	0.36
	根	-0.58	-0.65	-0.67*	-0.31	-0.29	-0.26

研究区域	C含量/(mg·g^-1)	N含量/(mg·g^-1)	P含量/(mg·g^-1)	C:N	C:P	N:P	数据来源
全球植物	—	20.62	1.99	22.50	232.00	12.70	Elser等(2000)
全球陆生植物	476.10	17.40	1.23	23.40	—	12.80	Kattge等(2011)
中国陆生植物	—	20.24	1.46	—	—	16.30	Han等(2005)
中国陆生植物	—	19.09	1.56	—	—	15.39	任书杰等(2007)
中国湿地	—	18.30	2.55	—	—	7.18	Hu等(2021)
中国东部湿地	369.00	25.90	3.28	17.10	149.00	9.50	Xia等(2014)
中国湿地植物	—	16.07	1.85	—	—	8.67	胡伟芳等(2014)
全球滨海湿地	418.00	16.13	1.59	37.09	432.20	13.04	Hu等(2021)
广西山口	374.83	19.75	1.71	20.15	262.88	12.55	本研究

广西山口不同演替阶段红树植物叶茎根的生态化学计量特征^*

Leaves, stems and roots stoichiometry characteristics of mangrove plants at different succession stages in the Shankou National Mangrove Nature Reserve, China^*

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广西山口不同演替阶段红树植物叶茎根的生态化学计量特征*

Leaves, stems and roots stoichiometry characteristics of mangrove plants at different succession stages in the Shankou National Mangrove Nature Reserve, China*

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广西山口不同演替阶段红树植物叶茎根的生态化学计量特征^*

Leaves, stems and roots stoichiometry characteristics of mangrove plants at different succession stages in the Shankou National Mangrove Nature Reserve, China^*