文献类型：期刊文献

英文题名：Interactive Effects of Intertidal Elevation and Light Level on Early Growth of Five Mangrove Species under Sonneratia apetala Buch. Hamplantation Canopy: Turning Monocultures to Mixed Forests

作者：Jiang, Zhongmao[1] Guan, Wei[1] Xiong, Yanmei[1] Li, Mei[1] Chen, Yujun[1] Liao, Baowen[1]

第一作者：姜仲茂

通信作者：Liao, BW[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Key Lab State Forestry Adm Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2019

卷号：10

期号：2

外文期刊名：FORESTS

收录：;EI(收录号：20190506437362);Scopus(收录号：2-s2.0-85060473248);WOS:【SCI-EXPANDED(收录号:WOS:000460744000007)】；

基金：This work was supported by the National Natural Science Foundation of China (grant numbers 41676080, 41876094); the National Key Research and Development Program of China (2017YFC0506103). We are grateful to Shuping Ding for establishment of the experimental plots and for data collection in Qi'ao Island.

语种：英文

外文关键词：intertidal elevation; light level; mangrove; restoration; survival

摘要：The introduced Sonneratia apetala Buch. Hamplantation plantations have occupied more than 3800 ha in China. The prevalence, fast growth rate, and high seed production of S. apetala have raised concerns about the risks to native mangrove habitats. Efforts are required to convert these introduced monocultures to mixed or native forests. In this study, we examined native mangrove colonization in the introduced S. apetala plantations at the Qi'ao Island, Zhuhai, China. A 12-month field study was conducted to evaluate the effects of intertidal elevation and light level on the survival and early growth of five native mangrove species, viz., Bruguiera gymnorrhiza (L.) Savigny, Kandelia obovata Sheue, Liu & Yong, Aegiceras corniculatum (L.) Blanco, Avicennia marina (Forssk.) Vierh., and Rhizophora stylosa Griff. Across intertidal elevations and light levels, the survival of B. gymnorrhiza was the highest. All the species had relatively higher survival rates under 30% canopy closure. Although the seedlings survived best at high intertidal elevation, the relative growth rate (RGR) was the highest at low intertidal elevation, and it was promoted by high light level. The stem height at low intertidal elevation was higher than that at high intertidal elevation, and it was the highest under 30% canopy closure. B. gymnorrhiza and R. stylosa at high intertidal elevation had relatively high leaf numbers, whereas K. obovata and A. marina showed a reverse tendency. The growth of stem diameter showed a decreasing trend initially and then increased with better performance at low intertidal elevations, and B. gymnorrhiza presented the best value under 30% canopy closure. Bruguiera gymnorrhiza showed the highest growth rate under similar conditions. Overall, intensive canopy thinning is an effective measure to promote native mangrove growth in S. apetala plantations. Additionally, increasing planting density especially at low intertidal elevations may improve native mangrove establishment and growth. Furthermore, Bruguiera gymnorrhiza is the best choice in the effort to plant native species in S. apetala plantations in the study area.