Journal of Tropical Oceanography >
The mangrove forest distribution and analysis of afforestation effect in Zhejiang Province
Copy editor: LIN Qiang
Received date: 2021-11-14
Revised date: 2022-01-21
Online published: 2022-03-22
Supported by
Zhejiang Province "14th five-year" Breeding Special Project Selection and Breeding of New Species of Coastal Protective Forest Trees(2021C02070-6)
Investigation on Mangrove Biological Resources in Zhejiang and Fujian(2017FY100701)
Based on the mangrove plantation data and stand growth monitoring at different periods, we analyzed the spatial and temporal variation of mangrove forests and regional silvicultural growth differences in Zhejiang Province. The results show that: (1) The total area of mangrove forests in Zhejiang Province by 2020 is 386.77 hm2, including 257.01 hm2 in Wenzhou and 129.76 hm2 in Taizhou; the main afforestation species are Kandelia obovata (368.48 hm2) and Myoporum bontioides (18.29 hm2); (2) The proportion of mangrove area at different periods was 0.11% (before 2000), 3.72% (2000-2010), 36.17% (2011-2015) and 59.99% (2016-2020), respectively; (3) The average heights of Kandelia obovata before 2000 and 2000-2010 were 205.5 cm and 246.13 cm, respectively; the cover was as high as 67.69% and 77.9%. And the average heights of Kandelia obovata in 2011-2015 and 2016-2020 was 106.63 cm and 50.17 cm, respectively; the cover was 68.66% and 24.56%; (4) There were significant differences in the alkali-hydrolyzed nitrogen, available potassium, organic matter and salt content in tidal flat sediments of mangrove plantations in different regions; (5) The height of 4-year-old Kandelia obovata in different regions was significantly higher (P<0.05) in the Xinmeizhou village, Longgang city than in the Shupaisha Island, while the diameter was significantly higher (P<0.05) in the Shupaisha Island than in the XimenIsland. The area of mangrove planting in Zhejiang Province has increased significantly in recent years; mangrove populations are growing vigorously, and the depression of early planted stands is high; the growth of Kandelia obovata varies significantly in different regions.
WU Weizhi , ZHAO Zhixia , YANG Sheng , LIANG Licheng , Chen Qiuxia , LU Xiang , LIU Xing , ZHANG Xiaowei . The mangrove forest distribution and analysis of afforestation effect in Zhejiang Province[J]. Journal of Tropical Oceanography, 2022 , 41(6) : 67 -74 . DOI: 10.11978/2021158
表1 浙江省各区域红树林分布面积Tab. 1 Mangrove distribution area in each region of Zhejiang Province |
市 | 县(市、区) | 种植年份 | 优势物种 | 面积/hm2 |
---|---|---|---|---|
温 州 市 | 苍南县 | 2008 | 秋茄 | 0.11 |
2017 | 秋茄 | 22.54 | ||
2018 | 秋茄 | 18.39 | ||
2019 | 秋茄 | 14.87 | ||
龙港市 | 2002 | 秋茄 | 10.07 | |
2018 | 秋茄 | 8.36 | ||
2019 | 秋茄 | 10.62 | ||
2020 | 秋茄 | 3.25 | ||
平阳县 | 2015 | 秋茄 | 1.10 | |
2018 | 秋茄 | 5.67 | ||
2020 | 秋茄 | 2.60 | ||
瑞安市 | 1980 | 秋茄 | 0.11 | |
2018 | 秋茄 | 2.94 | ||
洞头区 | 2018 | 秋茄 | 13.71 | |
2019 | 秋茄 | 13.60 | ||
2020 | 秋茄 | 4.49 | ||
龙湾区 | 2014 | 秋茄 | 4.00 | |
2015 | 秋茄 | 70.27 | ||
乐清市 | 1957 | 秋茄 | 0.33 | |
2000 | 秋茄 | 0.02 | ||
2006 | 秋茄 | 1.66 | ||
2008 | 秋茄 | 0.14 | ||
2013 | 秋茄 | 9.13 | ||
2018 | 秋茄 | 1.92 | ||
2019 | 秋茄 | 13.70 | ||
2020 | 秋茄 | 23.41 | ||
台 州 市 | 玉环市 | 2005 | 秋茄 | 0.96 |
2011 | 苦槛蓝 | 18.00 | ||
2011 | 秋茄 | 27.96 | ||
2015 | 秋茄 | 7.58 | ||
2016 | 苦槛蓝 | 0.29 | ||
2016 | 秋茄 | 7.83 | ||
2018 | 秋茄 | 7.18 | ||
2019 | 秋茄 | 42.00 | ||
2020 | 秋茄 | 4.72 | ||
温岭市 | 2009 | 秋茄 | 1.40 | |
2012 | 秋茄 | 1.88 | ||
2019 | 秋茄 | 3.10 | ||
2020 | 秋茄 | 0.89 | ||
椒江区 | 2003 | 秋茄 | 0.02 | |
2018 | 秋茄 | 3.14 | ||
三门县 | 2019 | 秋茄 | 2.81 | |
合计 | 386.77 |
表2 不同时期秋茄株高和盖度Tab. 2 Height and cover of Kandelia obovata at different periods |
年份 | 树高/m | 盖度/% |
---|---|---|
2000年以前 | 205.5±77.07 | 67.69±25.26 |
2000—2010 | 246.13±83.50 | 77.90±8.14 |
2010—2015 | 105.63±33.17 | 68.66±9.57 |
2016—2020 | 50.17±16.87 | 24.56±12.50 |
表3 不同区域滩涂沉积物化学性质Tab. 3 Chemical properties of sediments in different areas of tidal flat |
区域 | 高程/m | 碱解氮含量 /(mg·kg-1) | 有效磷含量 /(mg·kg-1) | 速效钾含量 /(mg·kg-1) | 有机质含量 /(g·kg-1) | 含盐量/‰ | pH |
---|---|---|---|---|---|---|---|
龙港市 新美洲村 | 2.80~3.57 | 47.50±3.45a | 24.03±1.16a | 906.50±89.04a | 13.15±1.36a | 13.76±3.71a | 8.29±0.10b |
龙湾区 树排沙岛 | 2.08~2.93 | 51.33±4.52ab | 22.53±3.45a | 1019.61±134.74a | 16.44±2.30b | 20.90±4.06b | 8.06±0.12a |
乐清市 西门岛 | 1.91~2.56 | 55.00±2.83b | 31.88±4.10b | 1256.50±50.26b | 20.30±2.79c | 27.71±3.15c | 8.19±0.06b |
注: 高程为1985国家高程基准, 以1956黄海高程基准-0.029作为统一基面; 上标不同字母表示不同区域间差异显著(P<0.05) |
表4 不同区域4年生秋茄株高和基径Tab. 4 Height and basal diameter of 4-year-old Kandelia obovata in different regions |
年份 | 树高/m | 基径/cm |
---|---|---|
新美洲村 | 86.93±22.48a | 26.98±5.56ab |
树排沙岛 | 53.63±9.15a | 35.43±5.71a |
西门岛 | 76.79±3.237ab | 18.70±4.81b |
注: 不同小写字母表示不同区域间差异显著(P<0.05) |
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