共查询到19条相似文献，搜索用时 406 毫秒
1.
通过深入调查研究广东沿海红树林生态系统资源及保护现状，针对近年因围垦养殖、城市建
设发展用地、城市生活污水和工业污水大量排放等，导致一些红树林及其生态环境遭到破坏，面积大幅减
少；现有红树林群落植物种类偏少、结构简单、遗传多样性水平较低；互花米草等外来有害生物入侵严
重，林分质量下降、系统功能退化；加上沿海红树林恢复属困难立地造林，技术措施及建设成本要求高等
实际情况，结合广东沿海滩涂立地条件及红树林经营管护特点等，提出了相应的红树林生态保护修复模式
及特殊立地修复营建关键技术等，为沿海红树林生态系统保护、修复、营建等提供理论依据和技术指导。 相似文献
2.
钦州市红树林资源现状与保护对策 总被引：1，自引：0，他引：1
钦州市有红树植物9种，半红树植物3种，红树林伴生植物4种。红树林面积3057.3hm^2，被占红树林面积1074.9hm^2，红树林面积中树高等级在2m以下2353.4hm^2，占77％，盖度在70％以下1646.8hm^2，占54％；Ⅱ级自然度红树林有2180.6hm^2，占红树林面积的71％；质量明显下降，建议尽快理顺有关管理部门的关系并建立红树林保护区，以保护和恢复钦州市的红树林资源，实现生态平衡和资源的可持续发展。 相似文献
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福建省红树林资源现状分析与保护对策 总被引：5，自引：0，他引：5
对福建省红树林资源的现状特点进行了分析评价，对福建省红树林资源发展和保护工作中存在的问题进行全面分析阐述，并提出今后红树林资源的管理和管护对策。 相似文献
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湛江红树林的保护策略 总被引：1，自引：0，他引：1
文章对湛江红树林的保护策略进行了探讨,提出要站在发展湛江及邻近地区大农业的高度上来认识保护湛江红树林的重要性;提出要就地保护好现有的１２４２３ｈｍ＾２的红树林及适宜其生长滩涂的具体措施;开展迁地保护和引种红树林遗传种质资源,为发展当地经济作贡献;建议成立“湛江红树林研究中心”和“湛江市生物多样性保护委员会”,切实做好湛江红树林的保护和合理开发利用工作。 相似文献
6.
深圳福田红树林资源保护与生态旅游开发 总被引：1，自引：0，他引：1
福田红树林自然保护区是深圳市得天独厚的一块生态资源宝地。为了维护红树林湿地的生态平衡,保护宝贵的生态资源,本文从多个方面提出了进行生态恢复的措施,并进一步提出发展生态旅游业是实现红树林资源保护和利用相协调的最佳途径。 相似文献
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指出了红树林是热带及亚热带地区森林生态环境的典型代表 ,但研究中发现红树林保护的起点较低 ,工作较为复杂.对此进行了要素分析 ,结果表明 :增加红树林的规模、增加红树林生态多样化可以有效地实现电白区红树林的规模扩增.而与此同时 ,减少环境污染、适当商业化开发红树林旅游资源也是促进红树林保护的要点. 相似文献
10.
彭华兴 《中南林业调查规划》2001,20(4):15-16,22
红树林资源调配已正式纳入我国森林资源管理的正常工作，红树林资源调查工作是搞好红树林资源管理的很重要基础工作；文中从红树林资源分布和生长特点了发，探讨关于红树林资源的多种手段相结合调查方法及调查区划的技术要求。 相似文献
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红树林保护的意义和建议 总被引：2，自引：0，他引：2
红树林是热带和亚热带海岸带上特有的森林群落,在净化海水、抵挡风浪、保护海岸、改善生态状况、维护生物多样性和沿海地区生态安全等方面发挥着重要作用。然而,由于围海造田、围垦养殖以及城镇发展等原因,我国红树林面积正在日益减少,红树林湿地保护问题已成为世界关注的热点问题之一。笔者结合工作体会,简述保护红树林的意义及对如何保护好现存的红树林提出建议。 相似文献
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浅谈文昌市清澜港红树林湿地生态系统存在问题和发展对策 总被引：1，自引：0，他引：1
通过对文昌市清澜港红树林湿地生态系统进行调查,分析清澜港红树林湿地的现状并寻找存在问题,结合生态和红树林湿地可续发展的观点,提出保护和发展清澜红树林湿地生态系统的对策。 相似文献
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Sebastián Martinuzzi William A. Gould Ariel E. Lugo Ernesto Medina 《Forest Ecology and Management》2009
Human activities have dramatically reduced the world’s area of mangroves just as the ecological services they provide are becoming widely recognized. Improving the conservation tools available to restore lost mangroves would benefit from a better understanding of how human activities influence the conservation of these ecosystems. We took advantage of historical information and long-term landscape analyses to relate land use change with the area of mangroves in Puerto Rico. We found that mangroves experienced dramatic changes over the last 200 years, and four distinct eras of change were visible. During the agricultural era (1800–1940) the area of mangroves declined 45%. As the economy changed to industrial in the late 1940s the area of mangrove increase due to reduced land use pressure on the wetlands. Nevertheless, urban expansion between 1960s and 1970s produced another decline. Public concern for mangrove conservation resulted in the legal protection of all the mangroves in 1972, and since then their area has expanded. We found that past human activity altered the original proportion of mangrove species. The number and size of mangrove-forest fragments was impacted by land use, and urban areas had fewer and smaller fragments than vegetated areas. Uncontrolled expansion of urban areas emerged as a major threat to mangrove conservation. Mangroves are resilient and recover quickly when given an opportunity if the geomorphological and hydrological features of the habitat are not changed by their use. The key to conservation appears to be a combination of the type of human activity in mangrove watersheds combined with strong legal protection. The following steps are recommended: (1) identify the areas that satisfy the ecological requirements of mangrove development; (2) incorporate better zoning regulations to maintain these areas natural and to protect the fluxes of water, nutrients, and organisms in and out of the system; and (3) monitor results. 相似文献
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红树植物生长在热带、亚热带海岸滩涂上。健全的红树植物生态系统是人类持续利用红树林的必要条件。如何保护、维持红树林的生态系统及其遗传健全性已成为红树林生态学家最关心的问题。红树植物当前的地理分布格局及形成原因是生态学家和保护生态学家的研究重点。文中介绍了近些年来红树植物亲缘地理学研究概况,包括地理隔离对红树植物分布格局的影响、基因交流受阻隔以及引起红树群体遗传结构变化的原因等内容;阐述了地质历史引起地形地貌变化、地理隔离、繁殖体扩散及生境环境等因子影响红树群体遗传演化的机制;探讨了红树植物亲缘地理学未来研究的重点,以期为红树植物保护和相关研究提供参考。 相似文献
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《Forest Ecology and Management》1997,96(3):241-259
The distribution, ecology, conservation and management of Chinese mangroves are reviewed. Mangroves naturally occur along the southeast Chinese coast and traverse the provinces of Hainan, Guangdong, Guangxi, Fujian and Taiwan, intermittently extending from 18°N. Thirty-seven mangrove tree species, representing 20 families and 25 genera, have been documented, with thermophilic eurytopic species being the dominant components. A remarkable decrease of species richness is evident from Hainan (18–20°N) to Fujian (23.5–27°N) (35 vs. 9 species). The existing mangrove area is ≈ 17 800 ha, accounting for slightly more than 0.1% of the world's total. Nearly two-thirds of China's mangroves have been lost during the past 40 years, largely due to conversion for rice-farming, embankment for aquaculture ponds and, recently, rapid urban development. A total of 201 papers on Chinese mangroves was published between 1950 and 1995, 178 of which are in Chinese; thus, they are not easily accessible to the international scientific community. Most of the work was conducted after 1985 (91% of the papers published) and research emphasized floristics with little attention to managementrelated issues. The net primary production of the Chinese mangroves shows a latitudinal trend, also significant deviations from predictions on models generated using non-Chinese data. Although 28 Chinese institutions have dealt with mangrove research, only five maintain long-term projects. The bulk of research has been carried out in six mangrove reserves: Qinglan, Dongzhai (Hainan), Mai Po (Hong Kong), Futian (Guangdong), Shankou (Guangxi) and Jiulongjiang (Fujian). Twelve mangrove reserves have been established so far in mainland China, one in Hong Kong (Mai Po) and one in Taiwan (Tanshui). These reserves cover an area of over 19000 ha, of which 8445 ha are mangroves (47% of existing mangrove area). Six measures that can facilitate mangrove conservation and management are recommended: (a) declare more mangrove areas as nature reserves; (b) set up a national mangrove committee and mangrove research centre to foster research and management; (c) develop concrete management guidelines; (d) enact protective legislation and ensure its strict enforcement; (e) launch education programmes in the major mangrove reserves; and (f) stop further nonsustainable exploitation of mangroves and their habitats. 相似文献
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中国广东红树林资源现状与保护对策 总被引：2，自引：0，他引：2
According to the survey of Guangdong mangrove resource in 2001 and author‘s field investigations in the past 5 years, the total mature mangrove land area of Guangdong Province was estimated at 9084 hm2, accounting for 41.4% of total mangrove land area of China. These mangrove forests totally consisted of 50 species belonging to 28 families, distributed at more than 100 locations along the coastlines of Guangdong and most of them present a high dense and dwarf appearance. The Ass. Avicennia marina is the most dominant mangrove association. The investigation results showed that the mangrove forests with coverage rates above 0.7 accounted for 68.0% of the total mangrove land area of the province and 77.8% of mangrove forests was less than 2 m in tree height. Since 1950, 54.6% of mangrove forests have disappeared due to paddy rice reclaim,aquaculture and city constructions. Derivational conservation efforts are still weakly empowered and should be strengthened intensively. The author suggested that mangrove laws and regulations should be enforced, mangrove scientific research should be strengthened; and mangrove conservation awareness of local community should be raised on conservation of mangroves. 相似文献
17.
Analuddin Kangkuso Sahadev Sharma Jamili Jamili Andi Septiana Idin Sahidin Usman Rianse 《Journal of Sustainable Forestry》2018,37(7):691-711
This study aims to establish allometric models and estimate aboveground biomass (AGB) of mangroves Rhizophoraceae in the Southeast Sulawesi, Indonesia. Allometric models of the AGB of mangroves Rhizophora apiculata, R. mucronata, and Ceriops tagal were established using independent variables consisting stem diameter at 30 cm from the ground (D30), diameter at breast height (DBH), D302H and DBH2H. The AGB of mangroves was estimated by applying allometric model and tree census. The results showed that the best fitting allometric models of AGB for R. apiculata is based on variable DBH, while DBH2H is the best variable for R. mucronata trees. Conversely, the D30 is the best variable for estimating AGB of C. tagal trees. Thus, there is some variation of independent variables on allometric models for the estimation of AGB for Rhizophoraceae mangroves. The AGB (ton ha?1) of R. apiculata, R. mucronata, and C. tagal was estimated respective 651.60, 232.11 and 154.56 in the protected area, and respective 137.59, 189.35 and 39.06 ton ha?1 in the unprotected area. Higher AGB of mangroves growing in the protected area indicated the suitable condition and undisturbed by human activities. The conservation of mangroves is necessary for the sustainability of mangroves and coastal ecosystems in the Coral Triangle ecoregion. 相似文献
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海平面上升引起潮汐水位降低和淹水时间增加,探明红树林对潮汐淹浸适应的生理生态特性有助于科学保护和修复红树林,而且科学选取红树林营林宜林地也需要了解红树林与潮汐浸淹之间的相互关联。文中从红树林潮汐浸淹的研究方法出发,重点论述水淹胁迫对红树植物形态表征、光合作用、呼吸作用、抗氧化系统、渗透调节物质和化学计量特征的影响,以及潮汐浸淹下红树植物分子生物学机制,以期为揭示红树植物对潮汐浸淹的适应机制以及全球气候变化背景下我国红树林造林实践和宜林地选择提供参考。 相似文献
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广东省雷州市九龙山风景区植物共记录有种子植物112科394属579种（包括变种）,其中裸子植物7科9属14种,被子植物105科385属565种;其中野生81科294属423种,栽培69科162属227种;植物区系表现了我国北热带植物区系资源的典型性,植物种类丰富,广布种较多;天然植被以湿地红树林群落、次生季雨林和灌丛为优势,人工植被以坡地尾叶桉和热带作物等为优势;是一个具有极大科研价值和保存价值的地区。建议加快红树林国家级湿地公园建设,加强其自然资源保护与生态旅游开发力度。 相似文献